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base: zwitschi/gig-line:v0.1.6
zwitschi/gig-line:main zwitschi/gig-line:vehicle-0.3.0
zwitschi/gig-line:v0.2.3 zwitschi/gig-line:v0.2.2 zwitschi/gig-line:v0.2.1 zwitschi/gig-line:v0.2.0 zwitschi/gig-line:v0.1.6 zwitschi/gig-line:v0.1.5 zwitschi/gig-line:v0.1.4 zwitschi/gig-line:v0.1.3 zwitschi/gig-line:v0.1.2 zwitschi/gig-line:v0.1.1 zwitschi/gig-line:v0.1.0
..
compare: zwitschi/gig-line:98eae6f3e98f67a7279795e4ac60c84717c40193
zwitschi/gig-line:vehicle-0.3.0 zwitschi/gig-line:main
zwitschi/gig-line:v0.2.3 zwitschi/gig-line:v0.2.2 zwitschi/gig-line:v0.2.1 zwitschi/gig-line:v0.2.0 zwitschi/gig-line:v0.1.6 zwitschi/gig-line:v0.1.5 zwitschi/gig-line:v0.1.4 zwitschi/gig-line:v0.1.3 zwitschi/gig-line:v0.1.2 zwitschi/gig-line:v0.1.1 zwitschi/gig-line:v0.1.0
61 Commits
v0.1.6 .. 98eae6f3e9
Author SHA1 Message Date
zwitschi 98eae6f3e9 docs(architecture): make section pages canonical 2026-11-09 16:30:29 +01:00
zwitschi 15cc6cbdd0 fix(vehicle): the glazing reads as glass 
The windows material was metallic 1.0 with roughness 0.0, which renders as a black void -
indistinguishable from a cabin with no glass at all. It is now tinted translucent: opacity
0.85, roughness 0.08, dark blue-grey base. The windscreen and side glass read as glass.

Opacity 0.45 was tried first and was worse than either extreme: the glass became invisible
and the greenhouse looked open again. The number is recorded in the tool's log line so the
next person does not repeat it.

The vision judge still returns verdict=no for this frame, disputing that the glazing is dark
and the wheels visible. The image shows both. It is an advisory helper - AGENTS.md says it
never replaces the human verdict - so the disagreement is written into
Screenshots/README.md rather than being resolved by iterating against the model.
 2026-11-09 16:21:41 +01:00
zwitschi bb12ce8c33 fix(vehicle): the car is red in the engine, not black 
Root cause was in the template, not the import path: 'car paint' is a legacy mix-shader
graph. The FBX exporter cannot map that node tree, so SM_Vehicle_Body imported holding
WorldGridMaterial - the engine's checker fallback - and rendered black while Blender showed
red.

Two changes:
  - Tools/vehicle_from_template.py converts legacy graphs to a Principled BSDF before export
    and picks the SATURATED colour from the mix nodes; a 'brightest wins' rule chose the 0.8
    grey diffuse beside the 0.49 red and produced a grey car.
  - Tools/ue_vehicle_materials.py creates M_Vehicle_HatchPaint, and the staged body panel
    gets it assigned at build time, because a static mesh slot cannot be repointed from
    Python after import.

Judge on the new capture: verdict=yes confidence=0.9 - 'a red hatch car with a red body and
dark wheels parked on a road'. The comparison table in Screenshots/README.md now shows both
columns agreeing on colour.

Still open and recorded: the glazing does not read - the greenhouse looks open, so the glass
system is mispositioned or drawn behind the body.
 2026-11-09 16:13:35 +01:00
zwitschi 046e2c8b9e docs(review): the Blender-vs-in-game comparison lives in Screenshots/README.md 
Merged COMPARISON.md into the review README as a generated section between
<!-- blender-comparison:begin/end --> markers, so there is one place to look and one place
to sign off. Tools/build_comparison_md.py rewrites only that block - the hand-written
sections around it are untouched - and formats the file with prettier afterwards, because a
generated table is never byte-identical to prettier's output and the repo gates on
--check.

Run it after every capture or Blender render; it is the routine that keeps the page current
with new images rather than a one-off export.
 2026-11-09 16:10:47 +01:00
zwitschi cb94438e0d feat(review): Blender screenshots beside the in-game captures, with signoff 
Two tools for the comparison the review was missing.

- Tools/blender_screenshots.py renders out of a .blend: one image per mesh object, and
  four turntable angles of the whole scene, framed from the scene's own bounds so adding
  geometry never silently crops a shot. Output lands in Screenshots/blender/, beside the
  in-game captures.
- Tools/build_comparison_md.py writes Screenshots/COMPARISON.md: a table with the in-game
  capture and its Blender render side by side per row, then a signoff table with one row
  per in-game screen. Unmatched shots show an em dash rather than disappearing, because a
  missing Blender render is information too.

The first run already earns its keep: the Blender render of the owner's hot hatch is red
with clear glazing, while the in-game capture of the same asset is near-black, so the
material colour is being lost on import - visible in one glance in the new page.
 2026-11-09 16:04:14 +01:00
zwitschi bb8ae3eb4b test(visual): the vehicle shot gets a reference, and the character/car height fixes 
The suite caught an incomplete target: demo-vehicle had an empty references list, which the
visual-loop test requires. It now points at Art/blender/vehicle/hatch-reference.png, a render
of the owner's template, so the shot can be compared like the others rather than only judged
by the vision model.
 2026-11-09 16:01:34 +01:00
zwitschi a17e982561 fix(placement): character and car stand on the ground, not above it 
Both floats had different causes and both were measured.

Character: the player start sat at Z 600 while the capsule settles at Z 561 on this
pavement - the QA self-test has been reporting that settle height all along - so the soles
hung 39 cm in the air. The start now uses the measured 561.

Car: the template's lowest geometry is exhaust and underbody, so grounding the model on its
whole bounding box left the tyres 4 cm above the origin. It is grounded on its WHEELS now.
The staged height is 342 rather than the traced road height of 366, because at 367 the
render still showed a gap: the trace and the visible road mesh disagree by about 25 cm at
that spot, and the number is recorded as empirical rather than derived.

Also adds a foot-contact log to the character at BeginPlay (actor Z, ground, capsule half,
mesh bottom, gap) so the next float is a measurement rather than a look.
 2026-11-09 15:59:52 +01:00
zwitschi b50afa4bcd feat(vehicle): the car renders, built from the owner's hot hatch template 
The invisible-vehicle defect is closed. Shot 9 now shows the car instead of an empty road.

Tools/vehicle_from_template.py converts Art/blender/vehicle/hot hatch.blend into UE-ready
assets, following two skills:

  vehicle-artist - systems split (body 113k tris, trim 10.5k, glass 20.5k, lights 18.6k,
  wheels 47.8k), one UCX_ hull 1.45 x 3.94 x 0.76 m, two decimated LODs at 39.7k and 13.6k.
  unreal-export - scale normalised to a documented 4.05 m hot hatch before export (the
  template measures 7.26 m, factor 0.5579), then verified after import: body bounds
  1.51 x 4.02 x 1.22 m against the 4.05 m target.

Staged as five plain StaticMeshActors, because the earlier probe proved those render while
the same meshes attached to the vehicle pawn do not.

Open and recorded rather than hidden: judge_screenshot returns verdict=no confidence=0.9 -
the silhouette does not read as a hot hatch from this angle and the car floats slightly.
The likely causes are a system misclassification in the template conversion and an
origin-height error of a few centimetres.
 2026-11-09 15:52:42 +01:00
zwitschi 021aa56121 test(vehicle): the pawn is the culprit, the meshes are fine 
Decisive experiment: the same SM_Vehicle_Body staged as a plain StaticMeshActor 5.5 m
from the pawn renders, while the panels attached to the vehicle pawn do not - with
visible=1, the right mesh name, a 238 cm extent, MarkRenderStateDirty() and
UpdateBounds() all in place. The asset and its material are fine; the pawn's component
hierarchy is what keeps them out of the renderer.

So the car is now staged as nine plain StaticMeshActors (body, glass, front/rear lights,
mirrors, four wheels) alongside the physics pawn: visible, and not yet attached to the
driving pawn. A visible car that does not drive yet beats an invisible one that does.

Two defects found by the tools while chasing this, both fixed: the demo builder staged the
vehicle twice per run (the scene audit caught the duplicate label), and clear() could leave
actors behind, so it now repeats until nothing is removed.
 2026-11-09 15:42:22 +01:00
zwitschi 1cddfbfc68 fix(vehicle): spawn on the road, not 2.5 m under it 
Measured rather than guessed: a downward trace from the spawn point reports the road
surface at Z 366 cm, while the vehicle was spawned at Z 120. The car was buried; the only
thing visible in the capture was its shadow falling on the road above it. Spawn is now
Z 470, the camera aims at 430, and it settles at Z 470.

Not fixed, and recorded: with the car above ground the capture still shows road and a
shadow with no car. Panels register, report visible=1 with mesh=SM_Vehicle_Body and a
238 cm extent at the expected position, and MarkRenderStateDirty()/UpdateBounds() run
after registration. The shadow proves a collider is there; the visible geometry is not.

Screenshots/README.md now separates the two causes so the next person does not re-fix the
buried spawn.
 2026-11-09 15:33:42 +01:00
zwitschi 627737062b test(vehicle): a review shot, and the judge that proves the car is missing 
Adds demo-vehicle to the camera list and the visual targets, plus shot 9 in
Screenshots/README.md - marked FAIL, because that is what it shows.

The vehicle is staged and runs: spawned at (-12950,-900,120), 9 visual panels attached,
panel 0 visible with a 238 cm extent, settled at Z 119 cm. The capture shows an empty road
with a soft shadow. Two checks disagree in a useful way: visual_loop --verify PASSES the
frame (it only tests size, blankness and tonal range, so a well-exposed empty road passes),
while judge_screenshot returns verdict=no confidence=1.0.

Strongest clue, recorded in TODO.md: a downward trace from the vehicle finds no ground at
all (ground at Z -9999), so the car sits over a surface without collision or inside
geometry - the shadow and the panels are not in the same place.

Diagnostics added along the way: mesh/visibility/bounds at BeginPlay, per-panel world
positions and extents, and the ground trace. The visual panels were also unhidden from the
physics mesh: SetVisibility(false, ...) hid them whether or not propagation was requested.
 2026-11-09 15:27:58 +01:00
zwitschi 5dd53ac30b fix(vehicle): one chassis body, so the car sits on the road 
The vehicle floated 3.7 m above the street because the physics asset had a body per bone
and the four wheel bodies intersected the chassis body, pushing the whole thing up. It is
now a single chassis body on the root bone (452 x 205 x 40 cm) - the same shape Unreal's
vehicle template uses, because Chaos simulates the wheels itself and they must not be
separate rigid bodies.

Settle check, same spawn point:
  before: settled at Z 494 cm
  after:  settled at Z 119 cm

Added -drivetest, which holds full throttle for 3 s and reports speed and distance. It
fails, and the failure names its own cause: BeginPlay logs '0 wheel objects after register'
while the component reports 4 wheel setups, so no wheels exist to receive torque. Recorded
in TODO.md with the next step - check the skeleton bone names against the setups, then give
the front and rear pairs their own wheel subclasses instead of the base class.
 2026-11-09 15:19:56 +01:00
zwitschi 4f3ed20e49 feat(vehicle): Chaos vehicle spawns and simulates, physics asset generated from script 
The physics asset could not be made from Python (PhysicsAssetFactory exposes no mesh
property), so a small editor-only C++ helper calls FPhysicsAssetUtils::CreateFromSkeletalMesh
- the same code path as the editor's Create Physics Asset action. It produces
PA_Vehicle_Sedan with 6 bodies and assigns it to SK_Vehicle_Sedan.

AGigLineVehicle is a Chaos wheeled pawn that configures its four wheels from the modelled
dimensions (radius 33 cm, wheelbase 278, track 156) and is staged in DemoMap. A run logs:
  spawned at (-12950, -900, 120), 4 wheel setups
  settled at Z 494 cm, simulating=1, speed=0 cm/s

That last line is the defect and it is not hidden: the vehicle rests 3.7 m above the road,
so the generated physics bodies do not match the mesh. Recorded in TODO.md with the next
step - inspect the bodies against the mesh, then either fix the creation params or author
two boxes and four wheel spheres explicitly.
 2026-11-09 15:14:49 +01:00
zwitschi 2e0421480c feat(vehicle): skeletal vehicle asset for Chaos, and the block that follows 
Chaos drives a skeletal mesh, so the static system split was not drivable on its own. The
builder now also rigs the vehicle: a root bone plus one bone per wheel, every wheel skinned
to its own bone, exported with the character preset. SK_Vehicle_Sedan imports with
SK_Vehicle_Sedan_Skeleton (508 triangles).

Blocked, and recorded as blocked rather than worked around: Chaos needs a PhysicsAsset, and
unreal.PhysicsAssetFactory in 5.8 exposes no mesh property - setting skeletal_mesh fails
with 'Failed to find property'. Bodies cannot be generated from the mesh in a commandlet,
so the asset has to be authored once in the editor or built in C++ with FPhysicsAssetUtils.

Also fixed the build order: the skeletal join destroys the per-system objects, so the
report and LODs read them before the join - the first attempt died with 'StructRNA of type
Object has been removed'.
 2026-11-09 14:53:35 +01:00
zwitschi 02cadd4964 feat(vehicle): split into systems, add real LODs, import to Unreal 
Follows the vehicle-artist object split, which the first build violated: body, glass,
front and rear lights, mirrors and a single wheel mesh are now separate objects and
separate assets in /Game/Hollywood/Vehicle. A single merged mesh across all systems is
what the skill forbids for a game vehicle, and it also meant glass could not be made
transparent or lights emissive independently.

LODs decimate rather than duplicate: LOD1 38 triangles, LOD2 14, against 132 for LOD0.
The first pass copied the shell unchanged and produced 84-triangle 'LODs' that saved
nothing.

Imports verified with bounds: body 4.76 x 1.76 x 1.28 m, wheel 0.22 x 0.66 x 0.66 m,
which match the modelled dimensions.

Open, recorded: LOD group wiring needs StaticMeshEditorSubsystem.import_lod, which is
unavailable in a headless commandlet, so the LOD meshes sit as their own assets for now.
 2026-11-09 14:46:02 +01:00
zwitschi a72bf85b2e feat(vehicle): model the sedan with collision hulls 
First 0.3.0 asset. Tools/vehicle_build.py builds a 4.72 x 1.80 x 1.44 m sedan - 2.78 m
wheelbase, 1.62 m track, 0.33 m wheels - as a three-tier silhouette: sill slab, bonnet
and boot shoulders, cabin greenhouse, plus glazing, lamps, bumpers and mirrors. 252
triangles.

Collision is four UCX_-prefixed convex hulls (body, cabin, two bumpers) per the
collision-proxy convention, hidden from render so the preview reads as the car rather
than the colliders.

Two corrections from the preview, both visible in the saved image: the first build was
one tall slab plus a floating cabin and read as a box truck, and the wheels were buried
inside a full-width sill - the sill is now 1.56 m so the wheels stand proud.

Reports every dimension to JSON so the Chaos vehicle config can read the wheelbase, track
and radius instead of restating them.
 2026-11-09 14:43:20 +01:00
zwitschi 73b5bd6cd1 Merge pull request #37: v0.2.3 — camera collision fixes 
The spring arm ticks with the rig now, so its collision probe runs and the boom shortens (340 -> 288 cm against a wall spawned behind the pawn).
 2026-11-09 14:41:49 +01:00
zwitschi 82cafc2f29 fix(camera): prove the boom shortens, and record how to repeat it 
With the spring arm activated the collision now works: a 2 m wall spawned 4 m behind the
pawn shortens the boom from 340 cm to 288 cm - 12 cm clear of the wall, matching the probe
size. -cameratest logs it, writes a placement screenshot, and the measurement is recorded
as a release check for 0.2.3.

Two traps documented because each one made a working mechanism look broken:
  - a spawned static-mesh actor has no collision unless it is created deferred and given
    its mesh and collision before FinishSpawning (three runs reported blocks trace=0)
  - TargetArmLength is not rewritten when the boom shortens, so reading the property
    reports the requested length; the camera's distance from the head is the measurement

Writes the 0.2.3 changelog entry and prunes the section from TODO.md.
 2026-11-09 14:40:18 +01:00
zwitschi 3e4dbd1014 fix(camera): activate the spring arm with the third-person rig 
Real defect, found by reading the code rather than by the harness: the spring arm was
created with SetAutoActivate(false), and ToggleCamera only activated the camera. A
deactivated spring arm does not tick, and its collision probe runs in that tick, so the
boom could never shorten no matter what stood behind the pawn. ToggleCamera and BeginPlay
now activate the arm alongside the camera.

The harness that was meant to prove the behaviour is still not working, and that is
recorded rather than glossed: -cameratest spawns a wall behind the pawn, but neither a
spawned static-mesh actor nor a runtime blocking volume blocks a trace (both report
blocks trace=0), so every 'arm 340 of 340' line so far was measured with no wall present
and is not evidence either way.
 2026-11-09 14:37:03 +01:00
zwitschi a6701aa3d1 test(camera): -cameratest harness for the spring-arm collision, result inconclusive 
0.2.3 is about camera clipping, and nothing had ever exercised the spring arm's
collision test. This adds a harness: find the nearest wall from the spawn, stand the pawn
70 cm off it facing away, wait for the boom, then report the arm length, whether the boom
ends inside geometry, and a back-trace from camera to head.

Inconclusive, and the setup is the suspect rather than the engine: every run reports the
arm at its resting 340 cm, but BOTH traces come back clear, so nothing was between the
pawn and the boom at all. The placement is wrong, not necessarily the collision.

Three wrong turns recorded in TODO.md because each cost a run: the probe accepted the
floor as a wall, then faced the pawn into the wall by negating the impact normal (which
points away from it), then set actor rotation only - which a possessed pawn discards in
favour of control rotation.

Next: look at the placement screenshot before trusting the measurement.
 2026-11-09 14:33:57 +01:00
zwitschi d8b44f1e57 Merge pull request #36: v0.2.2 — the character pass 
Clothing, hair cards, character blueprints and render-vs-blueprint comparison, raised sun, walk cycle starting at maximum stride. All eight review shots approved.
 2026-11-09 14:26:22 +01:00
zwitschi 6c4e0701fb release: v0.2.2 — the character pass 
Writes the 0.2.2 entry and prunes the section from TODO.md. The entry records that this
ships as a patch by the owner's decision even though it adds asset categories, which the
policy otherwise puts in a minor release - so the numbering is not mistaken for scope.

Contents: clothing as three separate skinned meshes, hair cards oriented from the scalp
normal, ComfyUI character blueprints and the render-vs-blueprint comparison, procedural
textures, materials built from scratch, the raised sun, and the walk cycle starting at
maximum stride.

Verified: 8/8 shots, all approved; mean deltaE 31.9 -> 21.8 against the blueprint; 95
tool tests. Known limitations listed rather than omitted - garments are shells over body
faces, the baked diffuse cannot be used because the mesh UVs do not map to it, and the
character has no face detail.
 2026-11-09 14:26:13 +01:00
zwitschi 0e7a6e898b docs(review): owner approved shots 6, 7 and 8 — all eight shots approved 
Ticks both the shot sections and their status rows, so the table and the sections agree:
5 previously approved, these 3 approved 2026-11-09 in their clothed, haired, relit state.
 2026-11-09 14:25:35 +01:00
zwitschi 2f6d06f897 docs(review): restore the status rows for shots 7 and 8 
The previous documentation commit dropped both rows from the status table while editing
the section text - the table then listed six shots against eight embeds. Restored, both
marked verified and pending approval.
 2026-11-09 14:24:02 +01:00
zwitschi 5de4183456 docs(review): shots 6, 7 and 8 reflect the clothed, haired character 
The appearance changed in 0.2.2 and the README still described an unclothed body with
splayed fingers, which is a defect in its own right: a shot whose README section is
stale is not a review.

Shots 6, 7 and 8 now describe the clothing, the dark card hair and the raised sun, and
their approvals are reset to pending because the appearance changed. 8/8 shots verify.
 2026-11-09 14:23:47 +01:00
zwitschi bea6aa3e05 light: raise the sun so the character leaves building shadow (needs approval) 
The skin was never grey. A red test colour reached the render and the slot was confirmed
holding M_Character_Skin, so the material and the assignment were both fine - the body
was simply standing in building shadow and lit almost entirely by the blue skylight
(intensity 2.6). Warm skin under blue fill reads blue-grey.

Raising the sun from pitch -62 to -74, same camera:
  face  (99, 98, 100) -> (131, 121, 117)
  arms  (67, 74, 81)  -> (71, 78, 85)

This touches every approved shot, so it sits on the branch for the owner's approval
rather than being folded in. Also records that the Unreal commandlet silently drops
unknown switches, which is why a --unlit-test flag never took effect.
 2026-11-09 14:20:07 +01:00
zwitschi 7c57bf318b fix(hair): dark constant colour, strand sheet used only as an opacity mask 
The hair read blond and thin because the strand sheet's RGB was driving base colour; the
sheet is a pale highlight map. Colour is now a dark constant (0.030/0.020/0.014) and the
texture supplies only alpha. Sampled in the render: hair (31, 26, 21).

Skin: the assignment is not the problem and the red test proved it - a runtime log shows
the slot holding M_Character_Skin, a deliberate red constant reached the render, yet the
intended warm tone samples as bluish grey (arms 67,74,81 / face 98,97,100) while the tee
and jeans show their colours correctly. Recorded in TODO.md with the next suspects rather
than guessed at.

The temporary material log is removed again.
 2026-11-09 13:55:19 +01:00
zwitschi 878d5a1f4e fix(clothing): close the coverage holes, and bind materials without crashing 
Solidify thickness went from 1 cm to 2 cm and the shell is fattened 8 mm along its own
normals afterwards. That closed the shoulders, hips and knees where the body was
showing through the cloth.

Evaluation against the blueprint, same shot and box before and after:
  mean deltaE     31.9 -> 21.8
  palette deltaE  25.4 -> 19.7
  aspect delta     1.24 -> 1.22

Also fixes a crash I introduced: binding the materials in Tick used
ConstructorHelpers::FObjectFinder, which is fatal outside a constructor - the game died
with 'FObjectFinders can't be used outside of constructors' and the render run failed
with signal 11. The binding now lives in BeginPlay and uses LoadObject.

Not fixed, and recorded: the arms and face still render neutral grey, so
M_Character_Skin itself is suspect rather than the assignment.
 2026-11-09 13:50:21 +01:00
zwitschi 86e9c5b693 feat(clothing): tee, jeans and shoes as separate skinned meshes 
Follows the character-artist clothing workflow literally: duplicate the body's own
faces for the garment base, solidify for cloth thickness, and keep each piece a
separate mesh. Attached as leader-pose components beside the hair, so no second rig.

- Tools/character_clothing_build.py builds three garments from the body mesh, trimmed
  geometrically (height band plus a width limit) instead of by dominant bone: the bone
  filter left holes wherever a face's strongest bone was outside the allowed list.
- Tools/ue_character_clothing_import.py imports them as CharacterTee / CharacterJeans /
  CharacterShoes, each arriving with its own single material slot.
- The pawn attaches all three, hidden with the body in first person.

Three traps recorded in MEMORY.md, each of which cost a build: MPFB weights its helper
geometry to groups that dominate every vertex, Blender refuses to apply a modifier to a
mesh with shape keys, and object-mode polygon selection is discarded on entering edit
mode - the delete wiped the whole garment.

Known defects, in TODO.md: the garments have coverage holes at shoulders, hips and
knees, and the hair reads light and wispy since its material was repointed to the
masked strand sheet.
 2026-11-09 13:41:39 +01:00
zwitschi 85a8437cbc feat(character): ComfyUI blueprints and a render-vs-blueprint evaluation 
Two tools that turn character work into something measurable.

- Tools/comfyui_character_blueprint.py generates a four-view sheet (front, side, back,
  head) plus a contact sheet from one description, with fixed seeds and a JSON record
  of prompts and prompt ids. First sheet: 'GigLine walker', lean pedestrian in a navy
  tee, jeans and sneakers.
- Tools/character_match.py compares a rendered character against a sheet: figure
  aspect, fill and coverage deltas, mean CIE76 colour distance, dominant-palette
  distance, and a side-by-side montage. The deltas stay separate on purpose - a single
  similarity score between a photoreal sheet and a low-detail body would be a number
  with no meaning.
- comfyui_generate.py grew wait_for_image() so both tools share the polling path
  instead of duplicating it.
- 13 unit tests for the colour maths, masks and palette; 95 tool tests pass.

First real result, recorded rather than smoothed over: aspect delta 1.24, fill delta
0.12, mean deltaE 31.9, palette deltaE 25.4. The montage shows the reason - the model
is a nude body and the blueprint wears a tee and jeans, so clothing dominates every
metric. Figure segmentation is explicit (--render-box): auto-detection picked backdrop
blobs on every attempt, and a background plate is the proper fix.
 2026-11-09 13:36:28 +01:00
zwitschi 1fc5835327 fix(hair): cards follow the scalp normal, three overlapping rows 
The first card build anchored every card on a fixed outward vector, so the silhouette
was a spiked crown. Each card is now oriented from the scalp normal at its anchor: the
length runs along the downward tangent, the width across it, and a small tip lift gives
the cut volume. Three overlapping rows (7/9/10) replace the single ring; overlap is
what stops cards reading as separate spikes.

26 cards, 401 verts, 224 quads, 468 tris, still all quads on one head bone.

Recorded as still open: the skin renders darker than the baked diffuse suggests, and
the generated pore and strand textures remain unwired because the material-editing
tool segfaults in the headless commandlet.
 2026-11-09 13:25:40 +01:00
zwitschi 39f07b0f5f feat(hair): hair cards as their own skinned mesh, attached as a second component 
Follows the character-artist skill on two points it is explicit about: hair for a
game character is a card system, and swappable parts stay separate meshes.

- Tools/character_hair_build.py builds SM_Char_Hair: a scalp cap plus 18 cards in
  three rings, quads only, every vertex weighted 1.0 to the head bone, UV-mapped for
  the strand sheet from Tools/generate_character_textures.py. 321 verts / 404 tris.
- Tools/ue_character_hair_import.py imports it as its own skeletal mesh, which is the
  point: joined into the body, Unreal collapses the second material slot and the hair
  renders with the skin material.
- The pawn carries it as a second USkeletalMeshComponent on SetLeaderPoseComponent, so
  it follows the head bone with no second rig and hides with the body in first person.

Still wrong and recorded: the cards point outward, so the silhouette reads as a spiked
crown rather than a short cut. The next pass orients them tangentially along the
skull with a second overlapping row. Tools/ue_character_materials.py also segfaults in
the headless commandlet when editing a material graph, so the generated textures are
not wired yet and the hair keeps its Blender base colour.
 2026-11-09 13:18:40 +01:00
zwitschi 72d00bdfbd memory: ComfyUI API shape, SD's failure on flat swatches, the material-slot collapse 2026-11-09 13:10:57 +01:00
zwitschi 54c579ab1a feat(tex): ComfyUI tool, procedural character textures, hair cap behind a flag 
Tools/comfyui_generate.py drives the local ComfyUI instance for generated textures
and writes a sidecar with model, prompt, seed and workflow, so a generated asset can
be regenerated or rejected instead of being an unexplained PNG. Models list and
generation both verified against 127.0.0.1:8188.

Stable Diffusion is not usable for flat skin swatches, and that is worth recording:
three attempts produced an anatomical close-up twice and a leather-scale surface once.
Skin detail is generated procedurally instead - tileable octave noise for pores, plus
a strand sheet for hair - in Tools/generate_character_textures.py, with sidecars.

Hair geometry exists (cap conforming to the head, weighted to the head bone, second
material slot in Blender) but Unreal's import collapses the second material slot, so
the cap renders with the skin material and reads as a bald skull. It is behind
--hair and off; the next step is a separate skeletal mesh attached as a second
component.
 2026-11-09 13:09:39 +01:00
zwitschi 89a9c59747 Merge pull request #35: walk cycle starts at maximum stride 
The stride shot regression was the clip's phase, not the capture harness: a sine starts and crosses zero at the two frames where the legs pass together.
 2026-11-09 13:05:51 +01:00
zwitschi 4b9ad22108 fix(walk): the cycle starts at maximum stride, so the capture shows one 
The stride shot regressed twice for two different reasons, and only the second was
the clip. The walk cycle was authored on a sine, which is zero at both the start and
the middle of the cycle - exactly the two frames where the legs pass together - so a
deterministic capture at any phase near those frames read as a still. The probe
proved it: frames 0 and 15 carried identical hip rotations while 7 and 22 were the
stride.

The cycle now starts at maximum stride (cosine). Length, amplitudes, keys and loop
are unchanged; only the phase moved. demo-third-person-walk is back as shot 8 and
shows a genuine stride with the curled hands from 0.2.1.

8/8 shots verify.
 2026-11-09 12:55:53 +01:00
zwitschi 0d57b718cf Merge pull request #34: 0.2.0 + 0.2.1 — third-person body, animation, rig fixes 
Third-person body with animated idle/walk, review harness for a deterministic stride capture, F3 debug overlay, and the 0.2.1 rig fixes (curled fingers, derived arm angle).
 2026-11-09 12:53:28 +01:00
zwitschi e9f31f271e release: v0.2.1 — rig fixes changelog entry, TODO pruning 
Writes the 0.2.1 entry (fingers, derived arm angle, base keys) and removes the
section from TODO.md. The stride-capture regression is listed under known
limitations rather than omitted: the shot is retired, not shipped.
 2026-11-09 12:52:01 +01:00
zwitschi 03af8146a6 fix(rig): curl the fingers, derive the arm angle 
Two defects from the 0.2.0 review, both fixed and both measured.

- Fingers splayed because the bind is an A-pose hand. All three joints of all five
  fingers per hand are curled in the standing base (0.28/0.34/0.22 rad), with the
  curl axis probed on the rig first. The front shot now shows relaxed hands.
- The arms-down rotation is derived on every build instead of hard-coded: the
  builder sweeps candidate angles and returns the one whose bone direction points at
  the target (0.60 rad, direction dot 1.000 this build). The old 0.55 was a
  hand-swept constant.
- Base bones are keyed in both clips, so a clip that only animates the limbs cannot
  drop the standing offset.

Regression, recorded rather than hidden: the stride shot shows a standing pose again
after this change. The probe had shown the walk clip playing (speed=28
clip=GigLine_Walk) before it, and pinning the clip to a quarter cycle did not restore
the stride, so the cause needs a fresh look. The shot is retired rather than shipped
broken, and the known-issues table now points at it.
 2026-11-09 12:48:40 +01:00
zwitschi 30e4d65743 todo: claim 0.2.1 rig fixes — splayed fingers, derived standing pose 2026-11-09 12:43:25 +01:00
zwitschi bc2e9c3b8e feat(hud): F3 debug overlay — FPS, frame time, worst frame, state 
A top-left readout for performance work: smoothed FPS and frame time, the worst
frame in a rolling two-second window, the active view, player speed, a frame
counter and the player's position in metres from the project origin.

- F3 toggles it, through the console variable gigline.Debug so a packaged build can
  be checked without a rebuild (IA_ToggleDebug).
- On automatically for -perf and -qaselftest, so a performance capture never depends
  on pressing a key first; off in the built demo, because a player should not see an
  FPS counter over Hollywood Boulevard.
- The first two seconds are a warm-up window excluded from the worst-frame figure.
  Without it the readout showed "worst 400 ms" for a healthy run: the startup shader
  and streaming hitches dominated the rolling maximum.

Measured cost on the self-test route at 1440p: 2.64 to 2.77 ms average, about 5 %,
still 6x the floor. The release-check number stays the overlay-off run; the
overlay-on series is committed beside it as
Docs/perf/0.2.0-walk-frametimes-overlay.csv.

Docs: controls (F3 row, overlay section, switch table), release checks (cost row),
architecture building block view (HUD and input list).
 2026-11-09 12:41:01 +01:00
zwitschi 12272d6b96 release: v0.2.0 — third-person body, animation, stride capture 
Writes the 0.2.0 changelog entry with the measured numbers, removes the completed
section from TODO.md (its goal stays in ROADMAP.md) and updates the roadmap status.

Release checks: 8/8 shots verify with 6, 7 and 8 approved; 1440p at 2.64 ms average
(379 fps); -qaselftest passes walk, reset, pause, transect, wall and facade probes;
82 tool tests pass. Known limitations are listed rather than hidden: splayed fingers,
a swept base rotation and unproven camera collision, all marked for later patches.
 2026-11-09 12:30:49 +01:00
zwitschi 56e104f5f3 todo: close the 0.2.0 animation check, leaving only the tag 
Both clips play and advance (idle proved by the single-node instance's asset time,
walk by shot 8), the body carries its skin material and the QA self-test passes.
The two cosmetic defects — splayed fingers and a base rotation that was swept rather
than derived — stay open as 0.2.2 items and are named in the check.
 2026-11-09 12:30:00 +01:00
zwitschi 8e880ed09d perf: 0.2.0 re-measured at 1440p — 379 fps average, 6.3x the floor 
-qaselftest at 2560x1440, TSR on, VSync off, no frame generation: 759 frames,
avg 2.64 ms (379 fps), p50 2.54, p95 3.39, p99 3.76, max 4.05 ms. The body, skin
material and animation add about 2 % over 0.1.5's 2.61 ms.

The same run passed every QA check: walk, reset 0 cm from spawn, pause/unpause,
transect 1456 samples with 0 holes, wall probe 0/35, facade probe 0/9.

Series committed as Docs/perf/0.2.0-walk-frametimes.csv and the result recorded in
the release-checks table next to the 0.1.0 and 0.1.5 numbers.
 2026-11-09 12:29:46 +01:00
zwitschi 9ce7011389 docs(input): the V toggle, the harness switches, and the HUD line 
Docs/controls.md documented the 0.1.0 bindings only, so the camera toggle added with
0.2.0 was undocumented for the player-facing set and the review switches were
undocumented everywhere. Adds the V row, a changes-since-0.1.0 note that first person
stays the default, and a table for -thirdperson / -walk / -qaselftest with the note
that the walking capture is driven per shot rather than by the switch.

The in-game HUD line gains 'V view' so the packaged build documents it too.
 2026-11-09 12:21:11 +01:00
zwitschi f5e7e66127 docs: remove the 0.1.4 review record and the 0.1.0 packaged capture 
Both were owner-requested removals. Nothing else referenced the review file except a
MEMORY entry, which now says the per-shot Approved column of Screenshots/README.md is
the only and authoritative record; release-checks keeps the 0.1.0 packaged-build
measurement as numbers and notes that its capture is no longer in the repository.
 2026-11-09 12:20:36 +01:00
zwitschi dbb177da6f feat(walk): the stride is captured — walking shot 8, traversal check closed 
Shot 8 shows the body mid-stride in profile: legs apart, arms counter-swinging. The
traversal release check for 0.2.0 is closed with that evidence.

The reason earlier attempts froze on one pose was not the clip. A probe of the
single-node instance showed the clip advancing normally (assetTime 0.19 -> 1.03,
rate 1.0, playing) while the pawn's speed stayed 0 and the clip stayed Idle: the
call that enables walking sat in the shot sequencer's BeginPlay, which runs before
the player pawn exists, so the cast found nothing and silently did nothing. Moved
into the per-frame follow update, the same run logs walk=1 speed=28 clip=GigLine_Walk
and the stride appears.

Also: the walk expectation was missing from visual_targets.json after the earlier
retirement, so --verify was checking 7 shots while 8 were captured. Restored; 8/8
verify.
 2026-11-09 12:18:22 +01:00
zwitschi eeeabe56b1 feat(review): deterministic walking capture, and the defect it exposed 
The shot actor can now photograph a moving pawn: a per-shot ShotFollow flag re-places
the camera every frame at a fixed offset in the pawn's frame, and the walk is driven
per shot (SetReviewWalk) with the pawn returned to spawn after a follow shot, so the
fixed-camera shots later in the list still find it in place. With that, the capture
stopped depending on where a 4.5 m/s pawn happened to be.

Two further bugs fixed on the way:
- the engine's screenshot folder is cleared before each run. The collect step copies
  every review-*.png it finds in Saved/, so a shot retired from the camera list kept
  reappearing with byte-identical content from an older run - which is how a walk shot
  that was never captured looked like a captured one.
- UpdateBodyAnimation no longer calls SetAnimation every frame. Re-setting the same
  clip restarts it, which freezes the body on frame 0.

What the deterministic capture then exposed: the walk clip is applied but does not
advance - every walking frame shows the same pose (arms forward, legs together). The
stride shot is retired again rather than shipped, and TODO.md names the next step:
log GetCurrentAssetTime across frames and check the imported PlayRate. The harness
stays wired for when the clip plays.

Shots 6 and 7 were re-rendered after these changes and still pass; 7/7 verify.
 2026-11-09 12:11:24 +01:00
zwitschi f84093adba feat(walk): a -walk harness flag, and the honest reason the stride shot is not in 
Screenshots 6 and 7 are approved, so the remaining 0.2.0 work is the traversal
release check. This adds the piece of harness it needs - `-walk` holds forward input
from the first frame, so the pawn actually crosses the sidewalk while the third-person
rig follows it - and records what that check still lacks.

A stride shot was attempted three times and removed: a fixed review camera cannot
catch a pawn moving at 4.5 m/s. Each attempt framed it at a different distance and
the last two missed it entirely, so shipping it would have been a broken shot with a
green verification. The TODO item now says the blocker is the capture harness (a
camera that tracks the pawn), not the game, and names where the shot goes back in.

The flag stays because it is what the traversal check will drive.
 2026-11-09 11:50:07 +01:00
zwitschi 0e0aed02d6 review: tick shot 6 in the status row too 2026-11-09 11:43:29 +01:00
zwitschi 7ea3c1999c review: owner approves the two third-person shots (6 and 7) 2026-11-09 11:43:23 +01:00
zwitschi 46b84884b8 fix(character): the arms hang at the sides — and why that took so long 
The character now stands naturally: arms at its sides with a soft elbow bend, hands
at the hips, feet flat. Both character shots confirm it, front and back.

The root cause was not the pose. The FBX importer had been silently refusing to
replace the existing assets: after changing the arm base from 1.55 rad to 0.55 rad
and rebuilding, the imported clip returned the IDENTICAL bone quaternion
(+0.006, +0.002, -0.179, -0.984). replace_existing=True was set and delete_asset
returned False even after chmod u+w, because the pawn's constructor hard-references
the clips. Importing under a new name (CharacterV2) created fresh assets and the
same probe then returned (+0.439, +0.898) — the rotation had landed. Every earlier
attempt had been invisible for this reason.

The rotation itself is measured, not inherited: sweeping it in Blender gives 0.55 rad
for arms down and clear of the body, 0.65 for straight down against the hip, 0.75 for
past vertical and into the torso. It lives in the clamp keys, not in the bind: every
bind experiment was impossible on this shape-keyed MPFB mesh or left Unreal showing
the old bind.

Remaining, for 0.2.2: the fingers splay from the bind, and the walk clip has still
not been captured in motion.
 2026-11-09 11:42:36 +01:00
zwitschi 8993fd83c4 feat(body): pose the arms down, add a front-angle shot 
The character now stands with its arms at its sides instead of in a bind A-pose,
and there is a second camera to prove it: the third-person shot only ever showed
the pawn's back, so a front-facing pose defect was invisible in review.

  demo-third-person-front  camera on the road, ~6 m in front, looking back north
                           at the pawn; embedded in Screenshots/README.md as shot 7.

The pose work itself is a chain of measured findings, all recorded in TODO.md:

- clip data is exported relative to the REST pose, so arms-down offsets held only in
  the keys arrived as a ±20 degree swing around an A bind;
- a rest-pose bake alone does not move the mesh: the MPFB mesh has shape keys, the
  armature modifier cannot be applied while they exist, and the vertices stayed in
  the A shape (X span unchanged at 1.051 m). Clearing the shape keys, baking the
  deformation into the vertices and re-binding is what made bind and clips agree.

Not settled, and left as an open item rather than a claim: the base pose uses
inverted signs to compensate for the FBX axis mapping, the upper arms clip into the
torso, and the fingers splay. An aim-based pose module was written and then removed
- applied without the vertex bake it produced arms raised in a V, and a half-working
shared module is worse than none. The proper solve is 0.2.2: apply the standing pose
at character creation, then author clips against that bind.
 2026-11-09 11:28:29 +01:00
zwitschi a1f5989cbb fix(anim): the clip now drives the body — two causes, both measured 
The body stood in an A-pose while the log said the clip was playing. Two
independent defects, found by querying the imported asset instead of guessing:

1. PlayAnimation needs the component in AnimationSingleNode with a live
   single-node instance. The body is hidden at construction and only unhidden by
   the camera toggle, so the first call could land before the component was ready,
   and the Wanted == PlayingAnimation guard then returned forever. UpdateBodyAnimation
   now sets the mode, calls SetAnimation + Play, and re-asserts while the instance
   is missing.
2. The arms-down offsets lived only in the clip keys. The exporter writes clip data
   relative to the rest pose, so they arrived as a ±20 degree swing around an
   A-posed bind - which is exactly what the pose probe measured. apply_base_pose now
   bakes them into the rest pose before any clip is authored, the same trick
   mpfb_character_export.py --pose idle uses. The table is applied with inverted
   signs: as written, the FBX axis mapping produced arms raised in a V.

Shot 6 confirms it: the arms hang at the sides. Still open and recorded - the idle
pose reads awkwardly (arms forward, hands splayed) and the walk clip has no shot in
motion; both are marked in TODO.md and Screenshots/README.md.

Instrumentation removed; the diagnostics that remain are behind
gigline.SetupLogs.
 2026-11-09 10:56:43 +01:00
zwitschi d0f94dff4e memory: record the bind-pose defect and the FBX that is not the cause 
Re-importing the exported FBX gives two actions with 1379 f-curves over 137 bones,
so the animation is baked; the defect is engine-side. Records that PlayAnimation
needs AnimationSingleNode mode and that the clip-name log line proves intent, not
effect.
 2026-11-09 10:45:07 +01:00
zwitschi 50e023f15d merge: bring main (v0.1.6) into anim-body-0.2.0 
Conflicts resolved by union, not by picking a side:

- AGENTS.md keeps the stronger visual-review rule (README updated with every visual
  change; a stale section is a defect).
- render_screenshots.sh keeps the absolute engine path from main and adds
  -thirdperson from this branch - both were needed and neither alone worked.
- Screenshots/README.md now lists six shots, retail and third-person both embedded;
  the known-issues tables merged, with the animation defect and unproven camera
  collision added to main's rows.
- visual_targets.json carries both expectations.
- Architecture docs: ADR-8 (realistic buildings) and ADR-9 (third-person body) both
  present and in numeric order; ADR-8 was mis-placed before the Quality Requirements
  heading in the combined document by an earlier edit, now fixed.
- Binary conflicts resolved to main's content, since the retail trim only exists
  there.

Checks: 82 tool tests, prettier clean, six embeds resolve.
 2026-11-09 10:43:00 +01:00
zwitschi e487655e2f Merge pull request #33: 0.1.6 — retail frontage (Lee Drug, 6806–6820) 
Patch release v0.1.6: retail frontage modelled from its own photograph, 0.9.0 realistic-buildings milestone planned, screenshots embedded inline.
 2026-11-09 10:41:10 +01:00
zwitschi 304c1e9afd docs(review): embed every demo shot inline, record the rule in AGENTS 
Screenshots/README.md on this branch still used the path-only table, so a reviewer
had to open six PNGs to judge a pass. Every shot now has its own section with the
image embedded, its view, expected content and both verdicts, plus a status table
at the top that links to them.

The known-issues list becomes a table of issue -> version and item that owns it:
pale hero stone, hero entrance doors, the bind-pose animation defect, unproven
camera collision and the terrain-as-pavement strip all point at their TODO owner.
Two stale entries removed: the theatre marquee exists (six trim actors staged) and
'materials not yet created' contradicted the scene conventions.

AGENTS.md now says the README is updated with every visual change, that the image
is embedded inline, and that approval ticks both the section and the table row.

Also removed an orphan: review-demo-retail-frontage.png had been re-copied into
this branch by the capture step although its geometry only exists on
facade-retail-0.1.6.
 2026-11-09 10:35:44 +01:00
zwitschi 05c1488c00 feat(camera): third-person rig, V toggle, visible body 
One pawn, both rigs (ADR-9): a skeletal body hidden in first person, a
collision-tested spring arm, and a toggle that swaps the active camera and the
body's visibility. Shipped default stays first person; -thirdperson starts the
pawn in the third-person rig so the review shot is reproducible, and the
screenshot run passes it.

Three defects found and two fixed:
- The skin material had no SkeletalMesh usage flag, so Unreal silently substituted
  the default grey. That is why the body rendered as clay.
- render_screenshots.sh still called ./Engine/... on this branch (the fix lives on
  the facade branch and never reached main); applied here so the shots generate.
- OPEN: the idle clip is bound and PlayAnimation is called - the run logs the clip
  name - but the body still renders in bind pose, arms out. Recorded with that
  evidence in TODO.md rather than called done.

Shot 5 (demo-third-person) added and documented; camera collision is implemented
but unproven, since the spawn has open space behind it.
 2026-11-09 10:33:06 +01:00
zwitschi 96238bdb6a feat(anim): idle and walk clips on the MPFB rig 
Two parametric cycles authored at 30 fps instead of hand-keyed poses, so the loop
closes by construction: GigLine_Idle (60 f, breathing sway, feet planted) and
GigLine_Walk (30 f, one stride, hip 0.45 rad / knee 0.55 / arm 0.32, arms
counter-phased, torso counter-rotation).

The limb axes were measured, not assumed: a probe rotated upperleg01.L by 0.5 rad
on each axis and read foot.L, which moved -0.022 -> +0.362 in Y on X, twisted on Y
and abducted on Z. Using the wrong axis here would have produced a character
scissoring sideways, which no import error would have caught.

The character export preset now bakes animation. Without bake_anim the exporter
writes a static bind pose and Unreal imports a mesh with no AnimSequence and no
error, so the importer asserts a clip exists and prints VERDICT: PASS/FAIL.

Verified in /Game/Test/Character: Idle 1.967 s and Walk 0.967 s, both AnimSequences,
skeleton intact. Playback on a possessed pawn is not yet verified: the demo pawn has
no visible body, so that check belongs with the third-person camera item.
 2026-11-09 10:14:05 +01:00
zwitschi 817313aabd todo: claim 0.2.0 character setup on branch anim-body-0.2.0 2026-11-09 10:11:10 +01:00
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AGENTS.md
+3 -3
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@@ -141,7 +141,7 @@ Keep the tools standard-library-only where practical; if a third-party import is
## Architecture documentation
[`Docs/Architecture/`](Docs/Architecture/) is the arc42 documentation: twelve numbered section files, `about-arc42.md`, and the combined [`architecture.md`](Docs/Architecture/architecture.md). **Markdown is canonical** — the `.adoc` sources were removed on 2026-11-08.
[`Docs/Architecture/`](Docs/Architecture/) is the arc42 documentation: [`README.md`](Docs/Architecture/README.md) provides the overview and links to twelve numbered section files; `about-arc42.md` records the template attribution. **Markdown is canonical** — the `.adoc` sources were removed on 2026-11-08.
Keep it current **in the same change as the implementation**, not in a later documentation pass. When work alters any of the following, edit the matching section:
@@ -160,7 +160,7 @@ Rules:
- **Describe what exists.** No aspirational architecture: anything planned belongs in `ROADMAP.md` and `TODO.md`. Every structural claim names the file, script or flag that implements it.
- **ADRs are append-only.** Never rewrite an accepted decision; supersede it with a new ADR that says what it replaces and why.
- **Keep the combined document in sync.** `architecture.md` mirrors the section files; when a section changes, update the combined document too.
- **Keep the index current.** `Docs/Architecture/README.md` links to the canonical section pages; update it when the structure or section list changes.
- **Images** live in `Docs/Architecture/images/` and are referenced, not duplicated.
- **Verify:** all Markdown must pass `prettier --check` (config in `.prettierrc`), and a command you quote must still run.
@@ -210,7 +210,7 @@ Any change that affects the game's appearance — meshes, materials, lighting, l
1. Run `Tools/render_screenshots.sh` (rebuilds `Game/GigLine/Content/Test/ReviewMap.umap` from current content, runs the game on it, captures the fixed camera list, copies the PNGs into `Screenshots/`).
2. Optional pre-check with a vision model: `Tools/judge_screenshot.py --image <shot.png> --expect "<what it should show>"` (or `--shots` to run every shot in the README) flags likely-missing content before a human looks. It reads `OPENROUTER_API_KEY` from `.env` (ignored). Small helper only — it never replaces the human verdict.
3. Update `Screenshots/README.md`: the image is **embedded inline** (`![alt](demo/<shot>.png)`) with its view, expected content, verification and approval state, plus one row in the status table at the top. The point is that the review happens in the file; a path alone is not a review. Describe any new shots or scene changes in the same change.
3. Update `Screenshots/README.md` **in the same change as any visual work** — every change that affects appearance, not only new shots: the image is **embedded inline** (`![alt](demo/<shot>.png)`) with its view, expected content, verification and approval state, plus one row in the status table at the top. The review happens in the file; a path alone is not a review, and a shot whose README section is stale is a defect.
4. The PNGs **are committed** so reviewers see exactly what the build rendered (`.gitignore` does not exclude them). Keep them in sync with this README: drop retired shots in the same change.
5. Wait for the user's approval before treating a visual change as done; record approval by ticking both the shot's section and its row in the status table in `Screenshots/README.md`.
Art/blender/vehicle/gigline-sedan.blend
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Art/characters/blueprints/blueprint.json
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{
"character": "GigLine walker",
"description": "lean adult pedestrian, short dark hair, olive skin, plain navy t-shirt, dark jeans, worn sneakers",
"model": "juggernautXL_ragnarok.safetensors",
"views": {
"front": {
"file": "Art/characters/blueprints/front.png",
"seed": 101,
"prompt": "GigLine walker, lean adult pedestrian, short dark hair, olive skin, plain navy t-shirt, dark jeans, worn sneakers, full body front view, neutral standing pose, arms at sides, even studio light, plain light grey background, character sheet",
"negative": "multiple people, crowd, text, watermark, signature, blurry, low quality, cropped limbs, extra limbs, deformed hands, cartoon, anime, logo",
"prompt_id": "ff81a0c1-e4d7-4740-9310-806c11600539"
},
"side": {
"file": "Art/characters/blueprints/side.png",
"seed": 202,
"prompt": "GigLine walker, lean adult pedestrian, short dark hair, olive skin, plain navy t-shirt, dark jeans, worn sneakers, full body side profile view, neutral standing pose, arms at sides, even studio light, plain light grey background, character sheet",
"negative": "multiple people, crowd, text, watermark, signature, blurry, low quality, cropped limbs, extra limbs, deformed hands, cartoon, anime, logo",
"prompt_id": "cdd0bfac-446b-4c5a-8375-37fb5c70a75e"
},
"back": {
"file": "Art/characters/blueprints/back.png",
"seed": 303,
"prompt": "GigLine walker, lean adult pedestrian, short dark hair, olive skin, plain navy t-shirt, dark jeans, worn sneakers, full body back view, neutral standing pose, arms at sides, even studio light, plain light grey background, character sheet",
"negative": "multiple people, crowd, text, watermark, signature, blurry, low quality, cropped limbs, extra limbs, deformed hands, cartoon, anime, logo",
"prompt_id": "069bc59d-93bb-41ce-a95b-f5b2e8194982"
},
"head": {
"file": "Art/characters/blueprints/head.png",
"seed": 404,
"prompt": "GigLine walker, lean adult pedestrian, short dark hair, olive skin, plain navy t-shirt, dark jeans, worn sneakers, head and shoulders portrait, front view, neutral expression, even studio light, plain light grey background",
"negative": "multiple people, crowd, text, watermark, signature, blurry, low quality, cropped limbs, extra limbs, deformed hands, cartoon, anime, logo",
"prompt_id": "39ab3ba6-5e6f-4a69-bdbb-b2faf4318dc0"
}
},
"contact_sheet": "Art/characters/blueprints/contact-sheet.png",
"note": "generated locally by Tools/comfyui_character_blueprint.py; record the model licence in THIRD_PARTY_NOTICES.md before shipping"
}
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{
"tool": "Tools/generate_character_textures.py",
"asset": "T_Character_Hair",
"size": 512,
"procedural": true,
"meta": {
"strands": 190,
"base": [
44,
32,
26
],
"highlight": [
96,
74,
58
]
},
"note": "generated, not photographed; no third-party licence"
}
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{
"tool": "Tools/generate_character_textures.py",
"asset": "T_Character_SkinDetail",
"size": 512,
"procedural": true,
"meta": {
"octaves": {
"fine": 96,
"mid": 24,
"broad": 7
},
"detail": 9,
"tint": [
222,
178,
152
]
},
"note": "generated, not photographed; no third-party licence"
}
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CHANGELOG.md
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Nothing yet.
## [0.2.3] — 2026-11-09
Camera collision worked in the code and never in the game.
### Fixed
- **The third-person boom never shortened.** The spring arm was created with `SetAutoActivate(false)` and `ToggleCamera()` activated only the camera. A deactivated spring arm does not tick, and its collision probe runs in that tick, so the boom could not shorten no matter what stood behind the pawn. Both `ToggleCamera` and `BeginPlay` now activate the arm with the rig.
### Added
- **`-cameratest`** — backs the pawn against a spawned 2 m wall, waits for the boom, and reports the shortening, whether the boom ends inside geometry, and a back-trace from camera to head. It writes `review-demo-camera-collision.png` so the placement can be checked by eye.
### Verified
- With a wall 4 m behind the pawn the boom shortens from 340 cm to **288 cm** — 12 cm clear of the wall, matching the probe size. Recorded as a release check.
- 8 review shots verify; 95 tool tests pass.
### Notes for future work
- **A spawned static-mesh actor has no collision unless it is deferred.** Setting the mesh and collision profile after `SpawnActor` produced a wall that blocked nothing (`blocks trace=0`) on three consecutive attempts. `SpawnActorDeferred` → set mesh and collision → `FinishSpawning` builds the physics state correctly.
- **`TargetArmLength` is not rewritten when the boom shortens.** The spring arm applies the shortened length to the camera, so the measurement must be the camera's distance from the head; reading the property reports the requested length and looks like a failure.
## [0.2.2] — 2026-11-09
The character becomes a character: clothed, haired, and measured against a generated blueprint instead of judged by eye.
**Version note:** this ships as a patch by the owner's decision even though it adds asset categories, which the release policy otherwise puts in a minor release. Recorded here so the numbering is not mistaken for scope later.
### Added
- **Clothing** — navy tee, dark jeans and off-white shoes as three separate skinned meshes (`Tools/character_clothing_build.py`), built from the body's own faces per the `character-artist` workflow: duplicate faces, solidify for cloth thickness, one mesh per piece. Each imports with its own single material slot and is attached as a leader-pose component.
- **Hair cards** (`Tools/character_hair_build.py`) — a scalp cap plus 26 cards in three overlapping rows, quads only, every vertex weighted to `head`. Cards are oriented from the scalp normal at their anchor, so the cut follows the skull instead of standing out as spikes.
- **Character blueprints** (`Tools/comfyui_character_blueprint.py`) — front, side, back and head views generated by the local ComfyUI instance from one description, with fixed seeds and a JSON record of prompts and prompt ids.
- **Blueprint comparison** (`Tools/character_match.py`) — figure aspect, fill and coverage deltas, mean CIE76 and dominant-palette distance, plus a side-by-side montage. The deltas stay separate on purpose: one similarity number between a photoreal sheet and a low-detail body would mean nothing.
- **ComfyUI driver** (`Tools/comfyui_generate.py`) and **procedural textures** (`Tools/generate_character_textures.py`), each writing a provenance sidecar.
- **Material builder** (`Tools/ue_character_materials.py`) — `M_Character_Skin` and `M_Character_Hair_Mat` built from scratch, because `unreal.MaterialEditingLibrary` segfaults in a headless commandlet when it rebuilds an existing graph.
### Changed
- **The sun was raised** from pitch -62 to -74. The character stood in building shadow lit almost entirely by the blue sky light, so warm skin sampled as blue-grey — face (99, 98, 100) before, (131, 121, 117) after at the same camera.
- **The walk cycle starts at maximum stride**, so the deterministic stride capture lands on the stride rather than on one of the two frames where the legs pass together.
- Cloth shells are fattened 8 mm along their own normals after solidify; 1 cm of solidify let the body through at shoulders, hips and knees.
### Fixed
- **Hair read blond and thin** because the strand sheet's pale RGB drove base colour; the sheet now supplies only the opacity mask, and the colour is a dark constant.
- **Garment coverage holes** at shoulders, hips and knees, closed by 2 cm solidify plus the normal fatten.
- **A crash of my own making:** binding materials in `Tick` with `ConstructorHelpers::FObjectFinder` is fatal outside a constructor. Moved to `BeginPlay` with `LoadObject`.
- **Shots 6, 7 and 8 were documented as an unclothed body** after the appearance changed; the README now matches the render and all eight shots are approved.
### Verified
- 8 review shots verify; **all eight approved** by the owner 2026-11-09.
- Blueprint comparison improved from mean ΔE **31.9 → 21.8** and palette ΔE **25.4 → 19.7** once the character was clothed.
- 95 tool tests pass (13 new for the colour maths, masks and palettes).
### Known limitations
- **The garments are still shells over body faces**, not simulated cloth: no wrinkles, no drape, and no separation from the body in motion.
- **`T_Character_Diffuse` cannot be used.** Sampling it renders the body black, so the MPFB mesh's UVs do not map onto that bake; skin is a constant tone and the generated pore sheet is unwired.
- **The character has no face detail** — the eyes, mouth and brows are mesh and lighting only, and read as a mannequin at close range.
- **Camera collision remains implemented but unexercised.**
## [0.2.1] — 2026-11-09
Rig fixes. Two defects from the `0.2.0` review, both fixed against measurements taken on the rig rather than against guesses.
### Fixed
- **The fingers splayed.** The bind pose is an A-pose hand, so its finger spread carried into every pose. All three joints of all five fingers per hand are now curled in the standing base (`0.28 / 0.34 / 0.22` rad, 30 bones); the curl axis was probed on the rig before use — rotating a finger base joint on X moves the tip toward the palm.
- **The arms-down rotation was hard-coded.** It is now derived on every build: `derive_arm_rotation()` sweeps candidate angles, reads the resulting bone direction and returns the one pointing at the target (0.60 rad, direction dot 1.000 in this build). The old 0.55 was a hand-swept constant that would have rotted on any rig change.
- **Base bones are keyed at both ends of both clips**, so a clip that only animates the limbs can no longer drop the standing offset.
### Known limitations
- **The stride capture regressed.** After the finger-curl and derived-arm change, `demo-third-person-walk` shows a standing pose again. The probe had recorded the walk clip playing (`speed=28 clip=GigLine_Walk`) before the change, and pinning the clip to a quarter cycle did not restore the stride, so the cause is still open. The shot is retired rather than shipped broken — seven shots verify, and the walk evidence stands on the earlier capture plus the probe.
- Camera collision remains implemented but unexercised against a wall.
## [0.2.0] — 2026-11-09
Third-person body. The pawn gains a visible, animated body and a third-person camera, so the walk cycle is finally something a player can see rather than a clip in an asset list.
### Added
- **`Tools/character_anim_build.py`**: `GigLine_Idle` (60 frames) and `GigLine_Walk` (30 frames) at 30 fps, authored as parametric cycles so the loop closes by construction. Limb axes were **measured** on the rig — a probe rotated `upperleg01.L` by 0.5 rad on each axis and read `foot.L`, which showed X swings the limb fore/aft while Y twists and Z abducts.
- **Third-person rig** (`ADR-9`): a visible skeletal body, a `USpringArmComponent` with collision testing, and a **V** toggle. One pawn carries both rigs; first person stays the shipped default.
- **Walk capture harness**: a per-shot `ShotFollow` mode that re-places the review camera every frame in the pawn's frame, plus `SetReviewWalk` / `ReturnToStartForReview`, so a stride is captured deterministically and the fixed-camera shots still find the pawn at spawn.
- **Review shots 6, 7 and 8** — third-person back, front and mid-stride — embedded in `Screenshots/README.md`.
### Changed
- Character export preset now **bakes animation** (`bake_anim`, all actions). Without it the exporter wrote a static bind pose and Unreal imported a mesh with no clips and no error.
- `Docs/controls.md` documents the V toggle and the review switches; the in-game HUD line reads `WASD move · Mouse look · Space jump · V view · R reset · Esc pause`.
### Fixed
- **`PlayAnimation` on a hidden component never took effect.** The body is hidden at construction and only unhidden by the toggle, so the first call could land before the component was ready; the code now sets `AnimationSingleNode`, calls `SetAnimation` + `Play`, and re-asserts while the instance is missing.
- **The animation switch restarted the clip every frame**, freezing the body on frame 0.
- **The importer silently refused to replace the existing assets.** Changing the arm rotation and rebuilding returned the identical bone quaternion every time; `replace_existing` and `delete_asset` both failed because the pawn's constructor hard-references the clips. Importing under a new name (`CharacterV2`) finally landed the change — that is what unblocked the pose after a dozen failed rebuilds.
- **The review runner copied stale screenshots** from `Saved/`, so a shot retired from the camera list reappeared with byte-identical content from an older run. The folder is cleared before each capture.
- **Walking was never enabled for the stride shot**: the call sat in the shot sequencer's `BeginPlay`, which runs before the player pawn exists, so the cast silently found nothing and `speed` stayed at 0.
### Verified
- **8 review shots verify**; shots 6, 7 and 8 approved by the owner.
- **1440p, no frame generation, VSync off**: 759 frames, avg **2.64 ms (379 fps)**, p50 2.54, p95 3.39, p99 3.76, max 4.05 ms — about 2 % over `0.1.5` and 6.3× the 60 fps floor. Series: `Docs/perf/0.2.0-walk-frametimes.csv`.
- `-qaselftest`: walk, reset 0 cm from spawn, pause/unpause, transect 1456 samples / 0 holes, wall probe 0/35, façade probe 0/9 — all PASS.
- 82 tool tests pass.
### Known limitations
- **The fingers splay** — the bind's finger spread carries into the pose. Deferred to `0.2.2`.
- **The arms-down rotation was found by sweeping**, not derived: 0.55 rad puts the arms at the sides, 0.65 against the hip, 0.75 into the torso. A derived pose is a `0.2.2` job.
- **Camera collision is implemented but unproven** — the spawn point has open space behind it, so no shot exercises the boom shortening.
- The third-person body has no head or hand IK and no turn-in-place; it is a first playable, not a finished character.
## [0.1.6] — 2026-11-09
Retail frontage. The two retail buildings beside the hero are modelled from their own photograph instead of the generic kit, and the photograph is treated as evidence: an analysis is written before any geometry, and every dimension the image does not resolve is carried into the part report as an assumption.
Docs/Architecture/05_building_block_view.md
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@@ -20,12 +20,14 @@ C++ classes in `Game/GigLine/Source/GigLine/`:
| --- | --- | --- |
| `AGigLineCharacter` | First-person player pawn | 1.75 m capsule, 4.5 m/s walk, Enhanced Input bindings, reset, pause, `-qaselftest` harness |
| `AGigLineGameModeBase` | Sets game mode and HUD class | `HUDClass = AGigLineHUD` |
| `AGigLineHUD` | HUD text overlay | `DrawText` every frame, bottom-left |
| `AGigLineHUD` | HUD text overlay | `DrawText` every frame: controls bottom-right, and an F3 debug readout top-left (`gigline.Debug`, on for `-perf`/`-qaselftest`) |
| `AGigLineNPCPerson` | NPC prefab (future) | Capsule + visible MPFB body, feet on Z 0 |
| `AGigLineShotActor` | Screenshot camera walker | Drives cameras in `-game` mode, `FScreenshotRequest`, quits |
| `UGigLineAssetTools` | C++ collision helpers | `SetComplexCollisionAsSimple` on `StaticMesh` assets |
Input assets in `/Game/Input/`: `IA_Move`, `IA_MoveBack`, `IA_Strafe`, `IA_StrafeLeft`, `IA_Look`, `IA_Jump`, `IA_Reset`, `IA_Pause`, bound in `IMC_Default`.
Input assets in `/Game/Input/`: `IA_Move`, `IA_MoveBack`, `IA_Strafe`, `IA_StrafeLeft`, `IA_Look`, `IA_Jump`, `IA_Reset`, `IA_Pause`, `IA_ToggleCamera`, `IA_ToggleDebug`, bound in `IMC_Default`.
Player-facing bindings: **WASD** move, **mouse** look, **Space** jump, **R** reset, **Escape** pause, **V** swap first/third person. The camera and body work landed with `0.2.0` (see ADR-9): the shipped default view stays first person, and `-thirdperson` starts the pawn in the third-person rig — used by the screenshot run so the review is reproducible.
### Site
@@ -55,6 +57,9 @@ Python scripts in `Tools/` drive the content pipeline:
| Script group | Purpose |
| --- | --- |
| `export_*`, `hero_facade_build` | Blender headless export (FBX) |
| `ue_import_*`, `ue_hero_facade_import` | Unreal headless import + placement |
| `character_anim_build`, `ue_character_anim_import` | Character animation clips (`GigLine_Idle`, `GigLine_Walk`) and their import |
| `export_*`, `hero_facade_build`, `retail_frontage_build`, `theatre_trim_build`, `facade_kit_build` | Blender headless export (FBX); trim builders work in world coordinates |
| `ue_import_*`, `ue_hero_facade_import`, `ue_import_retail_detail` | Unreal headless import + placement |
| `ue_build_demo_map`, `ue_build_review_map` | Map assembly (lighting, meshes, player start) |
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- **Decision**: Building realism gets its own minor milestone, `0.9.0 — Realistic buildings`, placed before the feature freeze. Its scope is the façade system (orders, profile library, storefront types, signage as decals), per-building photo-matched models, a measured material library with a texel-density rule, and LODs plus collision proxies. Patches keep fixes and refinements only. Renumbered by this decision: the former `0.9.0` freeze/beta/audit milestone becomes `0.10.0`, its patches `0.10.1`–`0.10.3`, and `1.0.0` moves to weeks 39–44.
- **Consequences**: Façade work now has a release gate — every building measured against its own photograph, every building with a collision proxy and a LOD, no placeholder materials — so "modelled" means verified, not merely present. The price is that realism work stops being sliced into patches, and the schedule shifts by one minor cycle. Blockouts without a photograph stay blockouts and are listed as such, rather than being dressed up to fill the milestone.
## ADR-9: Third-person body is an attachment of the first-person pawn, not a second pawn
- **Context**: `0.2.0` needs a visible body and a third-person camera, while `0.1.0` shipped a first-person pawn with no body and the owner's decision was first person for that release. Two separate pawn classes would duplicate movement, input and reset logic, which is the code most likely to drift.
- **Decision**: one pawn, both rigs. `AGigLineCharacter` carries a skeletal mesh (hidden in first person), a collision-tested spring-arm camera, and a **V** toggle that swaps the active camera and the body's visibility. The shipped default view stays first person; `-thirdperson` starts the pawn in the third-person rig and is what the screenshot run passes, so the review shot is reproducible without a human pressing a key.
- **Consequences**: movement, reset, pause and the QA self-test stay in one place. The body's animation state is driven from `Tick` by speed rather than from input, so being pushed or falling animates correctly. The cost is that the camera swap is not a separate actor, so a future cinematic camera needs its own path rather than reusing the toggle.
Docs/Architecture/README.md
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---
title: Gig Line Architecture Documentation
description: Architecture documentation for the Gig Line Linux-first Unreal Engine 5 demo around 6840 Hollywood Blvd.
status: v0.1.0
date: 2026-11-08
---
Gig Line is a Linux-first Unreal Engine 5 walking and driving demo around 6840 Hollywood Boulevard and the El Capitan Entertainment Centre. The architecture prioritises visual realism and geographically faithful placement while maintaining a fully walkable scene, reproducible asset pipeline, documented provenance, and a 60 FPS floor at 1440p.
This directory contains the canonical arc42 documentation. Each section is maintained independently; update the relevant page in the same change as its implementation. Project work and future scope remain in [TODO.md](../../TODO.md) and [ROADMAP.md](../../ROADMAP.md).
## Sections
1. [Introduction and Goals](01_introduction_and_goals.md)
2. [Architecture Constraints](02_architecture_constraints.md)
3. [Context and Scope](03_context_and_scope.md)
4. [Solution Strategy](04_solution_strategy.md)
5. [Building Block View](05_building_block_view.md)
6. [Runtime View](06_runtime_view.md)
7. [Deployment View](07_deployment_view.md)
8. [Cross-cutting Concepts](08_concepts.md)
9. [Architecture Decisions](09_architecture_decisions.md)
10. [Quality Requirements](10_quality_requirements.md)
11. [Risks and Technical Debt](11_technical_risks.md)
12. [Glossary](12_glossary.md)
See also [About arc42](about-arc42.md).
Docs/Architecture/architecture.md
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---
title: Gig Line Architecture Documentation
description: Architecture documentation for the Gig Line Linux-first Unreal Engine 5 demo around 6840 Hollywood Blvd.
status: v0.1.0
date: 2026-11-08
---
# Introduction and Goals
Gig Line is a Linux-first Unreal Engine 5 game that reconstructs a walkable (and eventually drivable) stretch of Hollywood Boulevard around 6840 Hollywood Blvd / El Capitan Entertainment Centre. The initial release (`0.1.0`) delivers a first-person walking demo of the south-side block between Highland Avenue and Orange Drive, plus north-side buildings within 50 m of the frontage.
## Requirements Overview
| ID | Description |
| --- | --- |
| F-1 | Walk both sides of Hollywood Blvd in the demo area without falling through geometry |
| F-2 | First-person movement (WASD + mouse look), jump, reset (R), pause (Escape) |
| F-3 | Fixed daytime lighting and atmosphere (sun, sky, fog, exposure) |
| F-5 | Designated street crossing with zebra markings at signalised crossings |
| F-6 | Building façades recognisable against reference photography |
| F-7 | Terrain, road, and sidewalk follow real-world DEM elevation |
| F-8 | 60 FPS at 1440p on the documented workstation and quality preset |
Full requirements and progress are in [TODO.md](../../TODO.md); version direction is in [ROADMAP.md](../../ROADMAP.md).
## Quality Goals
| Priority | Quality Goal | Scenario |
| --- | --- | --- |
| 1 | **Visual realism** | Renders read as the reference photographs: façade identity, proportion, material and light — judged side by side, shot against photo |
| 2 | **Geographic fidelity** | Building placement and street scale match the measured data and the photographs |
| 3 | **Terrain walkability** | Zero raycast holes across both sidewalks and the carriageway (84-sample transect passes) |
| 4 | **Build reproducibility** | Fresh checkout + documented engine path produces a runnable Linux build |
| 5 | **Provenance** | Every committed asset has recorded provenance |
| 6 | **Performance efficiency** | 60 FPS at 2560×1440 on RTX 5070 Ti, documented preset, no frame generation |
**How the order is used.** It decides trade-offs. When realism and performance disagree, realism wins and the cost is paid — but never by silently shipping a frame rate below the floor. The 60 FPS figure is a **budget that must still be met**, so the response to "realism costs too much frame time" is to cut the realism feature deliberately, record the cut, and keep the floor — not to let frames slip. Walkability outranks realism in one direction only: a beautiful block the player falls through is not a demo.
## Stakeholders
| Role | Contact | Expectations |
| --- | --- | --- |
| Owner / Director | zwitschi | Sets scope, approves screenshots, cuts release tags |
| AI coding agents | multiple sessions | Read `AGENTS.md`, `TODO.md`, `ROADMAP.md`, and this document for architecture constraints; never commit directly to `main` |
| Players | end users | Walk the demo at 60 FPS without falling through the world; see a recognisable Hollywood block |
# Architecture Constraints
## Technical Constraints
| Constraint | Explanation |
| --- | --- |
| Engine: Unreal 5.8.4 | Pinned; no bundled Linux clang — uses system clang 23.1.4. Game targets use `BuildSettingsVersion.V7`. |
| Platform: Linux first | Developed and tested on Bazzite Linux (Fedora 45 base). Windows builds ship but are secondary. |
| GPU: RTX 5070 Ti 16 GB | Dev workstation target. Vulkan RHI; open kernel module driver 615.78.08. |
| No static lighting | `r.AllowStaticLighting=False`. The demo is a fixed daytime scene lit entirely dynamically to avoid "LIGHTING NEEDS TO BE REBUILT" warnings. |
| Blender→UE via FBX | Flat diffuse colours do not survive FBX→Unreal import. All materials are authored in UE. |
| Terrain collision | UE 5.8 exposes `CollisionTraceFlag` (not `bUseComplexAsSimpleCollision`); Python cannot set it. Must use C++ helper `UGigLineAssetTools::SetComplexCollisionAsSimple`. |
| Coordinate convention | South = +Y, north = −Y (ground truth = street mesh orientation). 1 m in Blender = 100 cm in Unreal. |
## Organisational Constraints
| Constraint | Explanation |
| --- | --- |
| Squash-merge to `main` | Every PR is squash-merged for a linear history. No direct commits to `main` except integration merges. |
| Visual review required | Any change affecting appearance must produce screenshots for human approval before being marked done. |
| Asset provenance | Every committed asset must have verified licence and redistribution permission recorded in `THIRD_PARTY_NOTICES.md`. |
| Reference photography | Local only, gitignored, never committed. Used for façade work under fair-use / internal-development rationale. |
| LFS for binaries | `.uasset`, `.umap`, `.blend` tracked with Git LFS; `Binaries/`, `Intermediate/`, `Saved/` are gitignored. |
## Conventions
| Convention | Explanation |
| --- | --- |
| Semantic versioning | `MAJOR.MINOR.PATCH`. `0.x` documents breaking changes. `1.0.0` = agreed game scope. |
| Task tracking in `TODO.md` | Single central task list. `- [ ]` open, `- [-]` or `- [~]` in progress, `- [x]` done, `- [A]` active, `- [D]` deferred. |
| Headless Blender | All Blender work driven by `bpy` scripts in `Tools/`, not MCP. Blender skills are method guides only. |
| Named export presets | `ue_metric_v1` for static meshes, `ue_character_v1` for skeletal. Every exporter calls the metre→centimetre conversion. |
# Context and Scope
## Business Context
The system is a self-contained single-player game. It has no server backend, no multiplayer, and no live service dependencies. Its communication partners are:
| Partner | Inbound | Outbound |
| --- | --- | --- |
| Player (keyboard/mouse) | WASD, mouse, R (reset), Escape (pause), Space (jump) | Rendered 3D scene + HUD |
| OSM data | Extracted building footprints, street geometry, elevation | — |
| Filesystem | Engine content (`.uasset`, `.umap`), Blender sources (`.blend`), DEM GeoTIFF | Saved maps, screenshots, packaged build |
## Technical Context
| Channel | Protocol / Format | Purpose |
| --- | --- | --- |
| Keyboard + mouse | Enhanced Input (IA\_\*, IMC_Default) | First-person movement, look, jump, reset, pause |
| Vulkan RHI | GPU rendering | Scene display at 60 FPS / 1440p |
| FBX | Autodesk FBX (binary) | Blender→Unreal mesh and skeleton transfer |
| GeoTIFF | 3DEP 1 m DEM | Terrain heightfield source |
| OSM XML | Overpass API extract | Building footprint and street layout source |
| Git / LFS | HTTPS to Gitea remote | Source control, binary asset storage |
# Solution Strategy
## Technology decisions
- **Unreal Engine 5.8.4** for rendering, World Partition, physics (Chaos), and the Enhanced Input system. Chosen for its Linux support, open C++ source, and real-time rendering quality.
- **Blender 5.2 LTS** for all 3D modelling, UV work, and collision mesh authoring. Driven headlessly via `bpy` Python scripts, not MCP.
- **QGIS 4.2.3** for geographic data cleanup, coordinate conversion (EPSG:26911), and DEM preparation.
- **Blosm 2.7.28** for OSM building and street blockouts inside Blender (layout data only — not authoritative façade, height, or pavement detail).
- **MPFB 2.0.18** for human base meshes and baked materials (NPCs in `0.2.0+`).
## Top-level decomposition
The system is a single Unreal game module (`GigLine`) with no plugins beyond `EnhancedInput`. Content is organised by domain under `/Game/Hollywood/`:
- `Site/` — terrain, road, sidewalks, kerbs, crossing markings, site materials
- `ElCapitan/` — hero façade mesh and materials
- `Frontage/` — south-side block building meshes
- `North/` — north-side building meshes
- `Input/` — Enhanced Input actions and mapping context
All modelling and geographic processing live outside the game project in `Art/`, `Geo/`, and `Tools/`. The `Game/` directory contains only engine-ready content and C++ source.
## Quality achievement
- **Realism**: reference photography drives every façade decision, measured data fixes placement and scale, and renders are compared against the photographs (`Tools/visual_loop.py`, `Screenshots/README.md`). One module kit at the 4.96 m bay keeps the street wall coherent; materials are world-aligned and lit by a fixed daytime rig so a shot is comparable between runs.
- **Performance holds the floor, it does not set the agenda**: dynamic-only lighting (no build step, no static shadow maps), cheap procedural materials, minimal overdraw for street-level geometry, and 60 FPS at 1440p as a budget every release must meet.
- **Walkability**: complex-as-simple collision on terrain (C++ helper forces the flag on the asset), block-all collision on every site mesh, swept transect QA verifies zero raycast holes.
- **Fidelity**: geographic data verified before modelling (footprints, bounds, DEM); building placement checked against street mesh, never in isolation; reference photography drives façade work.
- **Reproducibility**: pinned toolchain in `Docs/toolchain.md`, named export presets, `Tools/check-lfs.sh` gate, fresh-checkout build procedure in `Docs/build.md`.
# Building Block View
## Whitebox Overall System
The system decomposes into five top-level building blocks:
| **Name** | **Responsibility** |
| --- | --- |
| Gameplay | Player pawn, movement, camera, input bindings, HUD, game mode |
| Site | Terrain, road, sidewalks, kerbs, crossing markings, site-level collision |
| Façades | Hero façade (El Capitan), south block frontage, north-side buildings |
| Art Pipeline | Blender models, geographic data, export scripts, import scripts |
| QA & Review | Screenshot pipeline, self-test harness, visual review workflow |
### Gameplay
C++ classes in `Game/GigLine/Source/GigLine/`:
| Class | Responsibility | Key detail |
| --- | --- | --- |
| `AGigLineCharacter` | First-person player pawn | 1.75 m capsule, 4.5 m/s walk, Enhanced Input bindings, reset, pause, `-qaselftest` harness |
| `AGigLineGameModeBase` | Sets game mode and HUD class | `HUDClass = AGigLineHUD` |
| `AGigLineHUD` | HUD text overlay | `DrawText` every frame, bottom-left |
| `AGigLineNPCPerson` | NPC prefab (future) | Capsule + visible MPFB body, feet on Z 0 |
| `AGigLineShotActor` | Screenshot camera walker | Drives cameras in `-game` mode, `FScreenshotRequest`, quits |
| `UGigLineAssetTools` | C++ collision helpers | `SetComplexCollisionAsSimple` on `StaticMesh` assets |
Input assets in `/Game/Input/`: `IA_Move`, `IA_MoveBack`, `IA_Strafe`, `IA_StrafeLeft`, `IA_Look`, `IA_Jump`, `IA_Reset`, `IA_Pause`, bound in `IMC_Default`.
### Site
Static meshes and materials in `/Game/Hollywood/Site/`:
| Asset | Role |
| --- | --- |
| `Terrain_DEM` | Ground heightfield (complex-as-simple collision) |
| `Road_Hollywood` | Carriageway surface (block-all collision) |
| `Sidewalk_North`, `Sidewalk_South` | Pedestrian surfaces (block-all collision) |
| `Kerb_North`, `Kerb_South` | Kerb edges |
| `Crossing_Markings` | Zebra markings at signalised crossing |
| `M_Asphalt`, `M_Concrete`, `M_KerbConcrete`, `M_Ground`, `M_RoadPaint`, `M_Stucco`, `M_FacadeStone` | Procedural materials (world-space-noise blend + roughness) |
### Façades
| Asset | Role |
| --- | --- |
| `SM_HeroFacade` | El Capitan Entertainment Centre detailed façade |
| `SM_ElCapitanTheatre`, `SM_Budget_6822`, `SM_Hollywood_6806`, `SM_Hollywood_6902`, `SM_Hollywood_6922`, `SM_LeeDrug_6800` | South block frontage (6 buildings) |
| `SM_Madame_Tussauds`, `SM_TCL_Chinese_Theatre` | North-side buildings (within 50 m) |
| `SM_Retail_LeeDrug`, `SM_Retail_6806` | Retail trim over 6800 and 6806–6820, modelled from their own photograph (`Tools/retail_frontage_build.py`, staged as `RetailTrim_*`). `6822 Budget` stays a bare volume: no photograph exists. |
### Art Pipeline
Python scripts in `Tools/` drive the content pipeline:
| Script group | Purpose |
| --- | --- |
| `export_*`, `hero_facade_build`, `retail_frontage_build`, `theatre_trim_build`, `facade_kit_build` | Blender headless export (FBX); trim builders work in world coordinates |
| `ue_import_*`, `ue_hero_facade_import`, `ue_import_retail_detail` | Unreal headless import + placement |
| `ue_build_demo_map`, `ue_build_review_map` | Map assembly (lighting, meshes, player start) |
| `ue_create_input_assets` | Enhanced Input actions + mapping context |
| `render_screenshots.sh` | Screenshot capture pipeline |
| `judge_screenshot.py` | Vision-model pre-check (optional) |
| `input_emulation.py`, `input_test.py` | OS-level virtual keyboard/mouse injection for input verification |
| `Tools/_common.py` | Pure helper shared by Blender builders, importable without Blender (bay layout) |
| `Tools/tests/` | Stdlib `unittest` tests for the pure parts of the tools (`requirements-tools.txt`) |
| `Geo/tools/mapbox_buildings.py` | Second height source: Mapbox `mapbox-streets-v8` building data vs our OSM heights |
Source data: `Art/blender/` (`.blend` files), `Geo/` (OSM extracts, DEM, verification docs).
### QA & Review
- `AGigLineShotActor` walks fixed cameras in `-game` mode, captures PNGs, and quits.
- `-qaselftest` switch on `AGigLineCharacter` runs a core-ticker harness: walk 2 s, reset, pause/unpause, ground transect — all PASS/FAIL logged.
- `Screenshots/` holds committed PNGs and `README.md` approval table.
## Level 2
### White Box Gameplay — Input Flow
1. `AGigLineCharacter::SetupPlayerInputComponent` binds `IA_*` actions to `MoveForward`, `MoveBack`, `MoveStrafe`, `MoveLeft`, `Look`, `StartJump`/`StopJump`, `ResetToStart`, `TogglePause`.
2. Movement delegates to `ApplyMove(Forward, Strafe)` → `AddMovementInput`.
3. Look applies yaw/pitch scaled by `LookSensitivity` (Y invertable via `bInvertLookY`).
4. `ResetToStart` teleports to `StartLocation` (captured on first grounded frame), clears velocity, resets control rotation.
5. `TogglePause` toggles `APlayerController::SetPause`, swaps input mode between `FInputModeGameOnly` and `FInputModeUIOnly`, shows/hides mouse cursor.
### White Box Site — Collision Model
- Every site mesh (road, sidewalks, kerbs, crossing) is `STATIC` with `BlockAll` collision.
- `Terrain_DEM` uses `CTF_UseComplexAsSimple` (forced by `UGigLineAssetTools` at build time, saved on the asset).
- The terrain corridor is carved to half-width 10.7 m around the road centreline so the player can walk the carriageway and both sidewalks.
- Ground Z: north sidewalk 395, road 366, south sidewalk 317 (3.94 m fall along the block, matching the DEM).
# Runtime View
## Walk the block
1. Player launches game → `AGigLineGameModeBase` spawns `AGigLineCharacter` at `PlayerStart` `(-13336, -1150, 600)`.
2. Character falls 144 cm to road surface (Z 456) and begins walking. `StartLocation` captured on first grounded frame.
3. Player holds W → `IA_Move` fires → `ApplyMove(1, 0)` → `AddMovementInput(ForwardVector, 1)` → capsule moves at 450 cm/s.
4. Mouse move → `IA_Look` fires → yaw/pitch applied to controller rotation → camera follows (attached to capsule at 160 cm eye height).
5. Player presses R → `ResetToStart` → teleport to `StartLocation`/`StartRotation`, `StopMovementImmediately`, reset control rotation.
6. Player presses Escape → `TogglePause` → `SetPause(true)`, switch to `FInputModeUIOnly`, show cursor. World timers stop; core tickers continue.
7. Player presses Escape again → `TogglePause` → `SetPause(false)`, switch to `FInputModeGameOnly`, hide cursor.
## Screenshot capture
1. `Tools/render_screenshots.sh` compiles editor, builds `ReviewMap` from `Tools/ue_build_review_map.py`, launches game in `-game` mode.
2. `AGigLineShotActor` iterates the camera list, sets view, calls `HighResShot 1280x720`, waits for capture.
3. On last camera, requests engine quit. PNGs are copied to `Screenshots/` and committed.
## QA self-test (`-qaselftest`)
1. Core ticker starts at `BeginPlay` (not a world timer — world timers freeze on pause).
2. 1.0 s: begin driving forward input.
3. 3.0 s: stop, measure displacement (> 200 cm = PASS).
4. 3.5 s: call `ResetToStart`.
5. 4.0 s: measure distance from spawn (< 100 cm = PASS).
6. 4.5 s: call `TogglePause`, check `IsGamePaused()` (= true = PASS).
7. 5.5 s: call `TogglePause`, check `IsGamePaused()` (= false = PASS).
8. 6.0 s: swept ground transect across three lanes (Y −1400, −167, +1000), X −14900 to −9420 at 200 cm spacing. 84 samples, 0 holes = PASS.
9. 7.0 s: final verdict logged.
## Build and import pipeline
1. Blender headless (`Tools/export_*.py`) reads `.blend` files, applies metre→centimetre conversion, exports FBX with `ue_metric_v1` preset.
2. Unreal headless (`Tools/ue_import_*.py`) imports FBX via Interchange, places meshes at geographic coordinates, sets collision profiles.
3. `Tools/ue_build_demo_map.py` assembles `DemoMap`: creates/repositions actors, sets lighting, saves map and assets.
# Deployment View
## Infrastructure Level 1 — Development Workstation
| Node | Specification |
| --- | --- |
| Dev workstation | Bazzite Linux 45 (Fedora 45 base, immutable ostree), Ryzen 7 7700X, 64 GB RAM, RTX 5070 Ti 16 GB, Vulkan RHI |
| Engine install | `/run/media/system/DATA/Engines/UE_5.8.4` (73 GiB, external to repo) |
| Project repo | `/run/media/system/DATA/Documents/06-games/gig-line` (Git + LFS, remote at `git.allucanget.biz`) |
| Build output | `/run/media/system/DATA/Builds/GigLineQA/Linux` (packaged Development build, ~1.1 GiB; outside the repository) |
Motivation
Single-machine development. No build farm, no CI pipeline yet. The engine, toolchain, and GPU are all on the same host.
Quality and Performance Features
- Vulkan RHI on RTX 5070 Ti, open kernel module driver 615.78.08.
- System clang 23.1.4 (no bundled engine clang) compiles game code.
- Build time: ~90 s incremental, ~5 min clean for the editor target.
Mapping of Building Blocks to Infrastructure
| Building Block | Infrastructure Element |
| --- | --- |
| Gameplay (C++) | Dev workstation — compiled to `libUnrealEditor-GigLine.so`, loaded by engine |
| Site + Façades (UE content) | Dev workstation — `.uasset`/`.umap` in `Game/GigLine/Content/` |
| Art Pipeline (Python/Blender) | Dev workstation — headless Blender 5.2 Flatpak, Python 3.14.8 |
| QA & Review | Dev workstation — game run in `-game` mode, PNGs to `Screenshots/` |
| Git remote | `git.allucanget.biz` — Gitea instance, LFS-enabled |
## Infrastructure Level 2 — Packaged Build
| Element | Detail |
| --- | --- |
| Linux packaged build | Development config, ~1.1 GiB. Contains engine binaries, game module, cooked content, no editor. |
| Run command | `./GigLine.sh -windowed -ResX=2560 -ResY=1440` |
No server infrastructure. The game is a standalone executable.
# Cross-cutting Concepts
## Coordinate system and scale
- **Source CRS**: EPSG:26911 (UTM zone 11N). Local origin recorded in `Geo/`.
- **Blender**: metres. East → +X, north → +Y (Blender convention).
- **Unreal**: centimetres. East → +X, north → **−Y** (confirmed from street mesh: `Sidewalk_North` Y −1912..−1053, `Sidewalk_South` Y +718..+1447).
- **Conversion**: every exporter calls the metre→centimetre function. Import presets (`ue_metric_v1`, `ue_character_v1`) are named and repeatable.
Rule: place a building only against a neighbour or street mesh, never in isolation.
## Collision model
- Site meshes (road, sidewalks, kerbs, crossing): `STATIC` mobility, `BlockAll` collision profile.
- Terrain: `STATIC`, `CTF_UseComplexAsSimple` (forced by `UGigLineAssetTools` at build time, saved on the asset — the flag lives on the `UStaticMesh`/`UBodySetup`, not the map).
- Buildings: `STATIC`, simple collision (convex hull from mesh).
- Rule: the collision flag must be saved on the asset. Saving only the `.umap` silently reverts it.
## Lighting
- Dynamic-only: `r.AllowStaticLighting=False`. All lights are `MOVABLE`.
- Fixed daytime rig: directional light (sun, −62° pitch), sky light, exponential height fog, post-process volume with fixed exposure.
- Rationale: avoids "LIGHTING NEEDS TO BE REBUILT" warnings; no bake step; the scene never changes time of day.
## Materials
- All materials authored in Unreal, not carried from Blender (FBX import loses diffuse colours).
- World-space-noise blend nodes for cheap procedural variation (asphalt grain, concrete speckle, stucco roughness).
- Instance parameters where tunable (e.g. wetness, ageing).
## Geographic data provenance
- OSM extract is layout data only — not authoritative for façade, height, or pavement detail.
- DEM from 3DEP 1 m; elevation verified against cross-sections in `Geo/verification/`.
- Reference photography (local, gitignored) drives manual façade work.
## QA harness
- `-qaselftest`: core ticker (not world timer) so pause cannot freeze the test that proves pause works.
- `GigLine SIM` / `GigLine GROUND`: TEMP diagnostic logging, to be removed before release tag.
- Screenshot approval: human must tick `Screenshots/README.md` before visual work is marked done.
# Architecture Decisions
## ADR-1: Dynamic-only lighting for the demo
- **Context**: The demo is a fixed daytime scene. Stationary lights demand a lighting build and produce "LIGHTING NEEDS TO BE REBUILT" warnings.
- **Decision**: `r.AllowStaticLighting=False`, all lights `MOVABLE`.
- **Consequences**: No bake step, no warning, simpler iteration. Slightly higher GPU cost per frame (no baked shadows) — acceptable for the demo scope.
## ADR-2: Materials authored in Unreal, not imported from Blender
- **Context**: FBX→Unreal import maps all Blender diffuse colours to white. Flat colour materials do not survive the pipeline.
- **Decision**: Build all materials (asphalt, concrete, stucco, façade stone, road paint) directly in Unreal with procedural nodes.
- **Consequences**: Materials cannot be previewed in Blender look-dev. Must round-trip to Unreal for visual check. But: full PBR control, world-space noise, no import surprise.
## ADR-3: Complex-as-simple collision on terrain via C++ helper
- **Context**: UE 5.8 removed `bUseComplexAsSimpleCollision`. Python cannot set `CollisionTraceFlag` on `StaticMesh`/`BodySetup` at all. The Interchange default is bbox-only simple collision, which placed an invisible lid 8 m above the street.
- **Decision**: `UGigLineAssetTools::SetComplexCollisionAsSimple` (C++) forces `CTF_UseComplexAsSimple` and saves the asset.
- **Consequences**: One C++ helper class. The flag must be saved on the asset (not just the map). No Python workaround exists.
## ADR-4: Reset captures StartLocation on first grounded frame
- **Context**: `BeginPlay` captures `StartLocation` at the PlayerStart, which is above grade (Z 600) so the capsule does not spawn embedded. Every reset dropped the player 1.4 m back into the air.
- **Decision**: Repeating 0.25 s timer captures `StartLocation` once the character reports `IsMovingOnGround()`, then clears itself.
- **Consequences**: Reset is correct. A one-shot timer at 2 s is wrong (fires after walking begins, records mid-stride position).
## ADR-5: Core ticker for QA self-test, not world timer
- **Context**: Pausing the game stops world timers. A timer-driven test freezes exactly when it proves pause works.
- **Decision**: `FTSTicker::GetCoreTicker()` drives the `-qaselftest` harness.
- **Consequences**: Test runs even while paused. Must be enabled explicitly (`-qaselftest`), never in normal play.
## ADR-6: South = +Y, north = −Y in Unreal
- **Context**: The street mesh established this convention: `Sidewalk_North` has Y range −1912..−1053, `Sidewalk_South` has +718..+1447.
- **Decision**: Adopt it project-wide. Never place a building by assumption; always verify against a street mesh or neighbour.
- **Consequences**: Matches Blender’s north→+Y after the Y-flip in the `ue_metric_v1` export preset.
## ADR-7: Headless Blender via bpy scripts, not MCP
- **Context**: Blender skill packs assume an MCP server; the project does not run one.
- **Decision**: All Blender work driven by Python scripts in `Tools/`. Skill packs used as method guides (checklists, naming, proportions) only.
- **Consequences**: Scripts are version-controlled and repeatable. No live Blender session needed for CI.
# Quality Requirements
## ADR-8: Realistic building façades are a minor milestone, not a patch
- **Context**: `0.1.4` carried the first façade pass as a _patch_, while the release policy says patches contain fixes and refinements and never new scope. The `0.1.6` retail pass then showed what that costs: a façade built in a patch has no release gate of its own, so a first pass that does not yet read as the building (`Screenshots/README.md`, 0.1.6 gaps) can sit inside a "done" patch series. Realism is also the project's leading quality goal, which a patch cannot carry.
- **Decision**: Building realism gets its own minor milestone, `0.9.0 — Realistic buildings`, placed before the feature freeze. Its scope is the façade system (orders, profile library, storefront types, signage as decals), per-building photo-matched models, a measured material library with a texel-density rule, and LODs plus collision proxies. Patches keep fixes and refinements only. Renumbered by this decision: the former `0.9.0` freeze/beta/audit milestone becomes `0.10.0`, its patches `0.10.1`–`0.10.3`, and `1.0.0` moves to weeks 39–44.
- **Consequences**: Façade work now has a release gate — every building measured against its own photograph, every building with a collision proxy and a LOD, no placeholder materials — so "modelled" means verified, not merely present. The price is that realism work stops being sliced into patches, and the schedule shifts by one minor cycle. Blockouts without a photograph stay blockouts and are listed as such, rather than being dressed up to fill the milestone.
## Quality Requirements Overview
Ordered by priority: realism first, performance last. The order decides design trade-offs; it does not license dropping a lower item silently (see the trade-off rule below the table).
| Priority | Category | Requirement |
| --- | --- | --- |
| 1 | Realism / Fidelity | Façade identity, proportion, material and lighting read like the reference photographs when compared side by side |
| 2 | Realism / Fidelity | Building placement matches the measured footprints and the photographs (within ~1 m) |
| 2 | Realism / Fidelity | Street scale (lane width, sidewalk width) within ~10 cm of the measured profile |
| 3 | Reliability / Terrain | Zero raycast holes across sidewalks and carriageway (84-sample transect) |
| 3 | Usability | WASD + mouse look, jump, reset (R), pause (Escape) — no tutorial needed |
| 4 | Maintainability | Fresh checkout builds with the documented engine installation |
| 4 | Portability | Linux build packages and runs; Windows build ships |
| 5 | Provenance | Every committed asset has a recorded source and licence |
| 6 | Performance efficiency | 60 FPS at 2560×1440, documented preset, no frame generation |
**Trade-off rule.** Realism leads: when a realism improvement costs frame time, the improvement wins. Performance is still a **floor, not a preference** — 60 FPS at 1440p without frame generation must be met at every release. If realism cannot fit inside that budget, reduce the realism scope deliberately and record the reduction in `CHANGELOG.md`; never ship below the floor without the owner's explicit approval. Walkability outranks realism in one direction: a block the player falls through is not a demo, whatever it looks like.
## Quality Scenarios
| ID | Source/Stimulus | Response | Metric |
| --- | --- | --- | --- |
| QS-1 | Screenshot is compared against its reference photograph | The render reads as the same building | Similarity score and visual match confirmed by the owner; `Tools/visual_loop.py` reports the deltas |
| QS-2 | A façade is placed from measured data | It sits on its verified footprint | World span probed against `Geo/verification/` within ~1 m |
| QS-3 | Player walks both sides of the demo | No fall-through, character stays at ground Z | 0 raycast holes in 84-sample transect |
| QS-4 | Player holds W for 2 s on flat road | Character moves forward | ≥ 200 cm displacement, Z constant within ±5 cm |
| QS-5 | Player presses R | Character teleports to spawn | < 100 cm from `StartLocation` |
| QS-6 | Player presses Escape | Game pauses, cursor appears | `IsGamePaused()` = true |
| QS-7 | Player presses Escape while paused | Game unpauses, cursor hides | `IsGamePaused()` = false |
| QS-8 | Fresh checkout + engine install | Build succeeds | Exit code 0, runnable binary produced |
| QS-9 | Game runs on dev workstation at 1440p | Frame rate holds the floor | ≥ 60 FPS, 99th percentile ≥ 55 FPS |
> QS-9 is last on purpose. Performance is a floor that every release must meet, not the goal that shapes the content: realism decides what gets built, the frame budget decides how much of it.
### Building realism gate (0.9.0)
| ID | Check | Metric |
| --- | --- | --- |
| BR-1 | A building with a reference photograph has a review shot compared against it | Silhouette and proportion deltas recorded per building in `Screenshots/README.md`; owner approval per shot |
| BR-2 | Every building is either photo-matched or explicitly recorded as an unfounded blockout | List in `TODO.md`; no building in an in-between state |
| BR-3 | Every building has a collision proxy and at least one LOD | Count of buildings missing either = 0 |
| BR-4 | No surface carries a placeholder material | Material audit in `Tools/ue_audit_scene.py` reports 0 placeholder slots |
| BR-5 | The realism pass does not break the floor | QS-9 still holds at 1440p, with the measured cost of the pass recorded |
# Risks and Technical Debts
| ID | Risk / Debt | Priority | Mitigation |
| --- | --- | --- | --- |
| R-1 | Terrain bbox proxy misdiagnosed as fall-through — already fixed, but the root-cause path (Interchange defaults to simple collision) could recur on reimport | High | `UGigLineAssetTools` runs in the build script; always reassert complex-as-simple after any reimport. Documented in `MEMORY.md` and ADR-3. |
| R-2 | Blosm 3Dsimple on Blender 5.2 — worked around, not resolved; `3Drealistic` mode untested | Medium | Pin Blosm 2.7.28 and Blender 5.2 LTS; test realistic mode before depending on it. |
| R-3 | Kerb height is an assumption (DEM does not resolve it) | Medium | Record the assumption in `Geo/verification/`; measure from reference photography if possible; mark as unresolved until verified. |
| R-5 | `GigLine SIM` / `GigLine GROUND` TEMP diagnostic logging still in `GigLineCharacter.cpp` | Medium | Strip behind a cvar or remove entirely before the `v0.1.0` release tag. |
| TD-1 | Materials are Unreal-only — no Blender preview round-trip | Low | Accepted (ADR-2). Look-dev happens in UE; screenshot review catches issues. |
| TD-2 | No CI pipeline — all builds and QA are manual on the dev workstation | Low | Acceptable for `0.x`. CI is a `0.3.0+` concern. |
# Glossary
| Term | Definition |
| --- | --- |
| Blosm | Blender add-on (2.7.28) that imports OSM data as 3D building and street blockouts. Used for layout only — not authoritative for façade or height. |
| PIE | Play In Editor — an Unreal Editor feature that runs the current map as a live game session inside the editor window, with full game code, input, and physics, without packaging a build. Used for interactive verification (walk, reset, pause) before the scripted QA self-test. |
| Complex-as-simple collision | `CTF_UseComplexAsSimple`: Unreal collision mode where the render mesh triangles are used as the collision surface, instead of a simplified proxy. Required for terrain so the player walks on the actual ground shape. |
| DEM | Digital Elevation Model. 3DEP 1 m resolution GeoTIFF covering the demo bounds. Source of terrain heightfield. |
| El Capitan | El Capitan Entertainment Centre, 6838 Hollywood Blvd. The hero building of the demo. |
| Enhanced Input | Unreal’s modern input system (UE 5+). Uses Input Actions (`IA_*`) and Input Mapping Contexts (`IMC_*`) instead of legacy axis/action bindings. |
| EPSG:26911 | UTM zone 11N, the projected CRS used for the demo area. Local origin recorded in `Geo/`. |
| Hero façade | The detailed, reference-calibrated model of the El Capitan building frontage. |
| MPFB | MakeHuman Plugin for Blender (2.0.18). Generates parametric human base meshes with rigs and baked materials. |
| PlayerStart | Unreal actor that defines where the player pawn spawns. Positioned above grade so the capsule does not embed in the floor on spawn. |
| QA self-test | The `-qaselftest` command-line switch that runs an automated behaviour check (walk, reset, pause, ground transect) via a core ticker. |
| Site | The terrain, road, sidewalks, kerbs, and crossing markings — the ground-level infrastructure of the demo area. |
| Squash merge | Git merge strategy that compresses all branch commits into one commit on `main`, keeping a linear history. |
| Swept transect | A QA technique that raycasts vertically at regular intervals along a path (e.g. every 200 cm along both sidewalks and the carriageway) and counts holes (misses). Zero holes = the block is fully walkable. |
| UE | Unreal Engine — Epic Games' real-time 3D creation platform (version 5.8.4 in this project). Comprises the Unreal Editor (including PIE, content browser, viewport, blueprint editor), a C++ game framework, and runtime systems for rendering (Vulkan RHI on Linux), physics (Chaos), and input (Enhanced Input). The game project is `GigLine.uproject`; game code is a single C++ module in `Game/GigLine/Source/GigLine/`. |
| World Partition | Unreal's world composition system for large open-world levels. Not yet used in `0.1.0` but planned for `0.3.0+` driving routes. |
| Y convention | In Unreal, south = +Y, north = −Y (confirmed from street mesh orientation). In Blender, north = +Y; the `ue_metric_v1` export preset flips Y. |
---
**About arc42**
<div data-wrapper="1" role="lead">
arc42, the template for documentation of software and system architecture.
</div>
Template Version 0.1.0. initial architecture documentation, 2026-11-08
Created, maintained and © by Dr. Peter Hruschka, Dr. Gernot Starke and contributors. See <https://arc42.org>.
Adapted for the Gig Line project (Linux-first walking/driving demo around 6840 Hollywood Blvd).
Docs/controls.md
+28 -1
View File
@@ -1,4 +1,4 @@
# Controls (`0.1.0` walkable demo)
# Controls
Keyboard and mouse. The same list is shown in-game, bottom-right of the frame (`AGigLineHUD`), and the packaged Linux build ships with these bindings.
@@ -12,6 +12,8 @@ Keyboard and mouse. The same list is shown in-game, bottom-right of the frame (`
| Jump | `Space` | |
| Reset to start | `R` | Returns to the grounded spawn point |
| Pause / release mouse | `Escape` | Second press resumes and recaptures the mouse |
| Swap first / third person | `V` | First person is the default; the body is hidden in that view |
| Show / hide debug overlay | `F3` | FPS, frame time, worst frame, view mode, speed and player position |
## Notes
@@ -19,6 +21,31 @@ Keyboard and mouse. The same list is shown in-game, bottom-right of the frame (`
- The mouse is captured on launch, so looking works without clicking first. `Escape` toggles the capture as part of pause.
- Bindings are Enhanced Input actions in `/Game/Input` built by `Tools/ue_create_input_assets.py`; the mapping context is `IMC_Default`.
## Changes since `0.1.0`
- **`V` swaps first and third person** (`0.2.0`, `IA_ToggleCamera`). The shipped default view is still first person, as the owner decided for `0.1.0`; third person adds a collision-tested spring-arm camera and a visible, animated body. `Escape` still pauses and releases the mouse in either view.
## Debug overlay
`F3` toggles a top-left readout: smoothed **FPS** and frame time, the **worst** frame in a rolling two-second window, the active view (first or third person), player speed, a frame counter, and the player's position in metres from the project origin. The first two seconds of a session are a warm-up window and are excluded from the worst-frame figure, because shader and streaming hitches there made a healthy run read as a 400 ms stall.
It is **off in the built demo** — a player should not see an FPS counter over Hollywood Boulevard — and **on automatically** when the process is started with `-perf` or `-qaselftest`, so a performance capture never depends on someone pressing a key first. In a running build it can also be forced with the console variable `gigline.Debug 1`.
Cost: about **5 %** of frame time at 1440p in the demo (2.64 → 2.77 ms average), measured in the same self-test route. The performance release check is recorded without the overlay for that reason; the overlay run is kept beside it as `Docs/perf/0.2.0-walk-frametimes-overlay.csv`.
## Review and harness switches
These are command-line switches for the screenshot pipeline and QA runs, not player controls. They exist so a capture is reproducible rather than dependent on a human pressing keys at the right moment.
| Switch | Effect |
| --- | --- |
| `-thirdperson` | Starts the pawn in the third-person rig, so a capture shows the body without anyone pressing `V` |
| `-walk` | Holds forward input from the first frame — what makes the stride shot possible |
| `-qaselftest` | Runs the scripted walk / reset / pause / transect checks and quits; also enables the debug overlay |
| `-perf` | Enables the debug overlay for a manual frame-time check |
The walking shot is driven per shot rather than by the switch: the shot actor enables the walk only while a tracking (`ShotFollow`) camera is being captured, and returns the pawn to spawn afterwards, so the fixed-camera shots still find it in place.
## Testing input without a physical keyboard
`Tools/input_test.py` injects OS-level keyboard/mouse events through a virtual `/dev/uinput` device (see `Tools/input_emulation.py`), e.g.:
Docs/perf/0.1.0-packaged-hud-controls.png
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Docs/perf/0.2.0-walk-frametimes-overlay.csv
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frame,ms
0,2.607
1,2.532
2,2.324
3,3.432
4,2.808
5,2.870
6,2.367
7,2.311
8,2.756
9,3.278
10,2.418
11,2.665
12,2.438
13,2.646
14,2.461
15,2.941
16,2.975
17,3.164
18,2.766
19,2.341
20,2.543
21,3.395
22,2.772
23,2.575
24,2.737
25,2.427
26,2.538
27,2.708
28,3.183
29,2.734
30,2.425
31,2.546
32,2.600
33,2.545
34,3.705
35,2.563
36,2.907
37,2.368
38,2.470
39,2.411
40,3.778
41,3.735
42,2.292
43,2.458
44,2.566
45,3.044
46,3.449
47,2.914
48,3.243
49,2.084
50,3.872
51,1.633
52,3.389
53,2.448
54,2.474
55,2.509
56,2.346
57,3.192
58,2.762
59,2.788
60,2.538
61,2.520
62,2.517
63,3.036
64,3.205
65,3.080
66,2.514
67,2.429
68,2.515
69,2.963
70,3.555
71,2.430
72,2.742
73,2.435
74,2.526
75,3.304
76,3.511
77,2.477
78,2.472
79,2.452
80,2.421
81,3.334
82,3.286
83,2.725
84,2.411
85,2.597
86,2.440
87,3.213
88,3.411
89,3.047
90,2.365
91,2.530
92,2.877
93,3.249
94,3.186
95,2.684
96,2.304
97,2.406
98,2.948
99,3.652
100,2.822
101,2.552
102,2.575
103,2.354
104,2.676
105,2.775
106,3.865
107,2.480
108,2.501
109,2.675
110,2.724
111,3.671
112,2.828
113,3.064
114,2.153
115,2.752
116,2.936
117,3.008
118,2.932
119,2.648
120,2.441
121,3.471
122,1.885
123,4.435
124,2.504
125,3.241
126,2.813
127,2.445
128,3.321
129,3.055
130,3.222
131,2.766
132,2.582
133,2.597
134,3.637
135,3.150
136,3.163
137,2.675
138,2.708
139,2.581
140,3.377
141,3.518
142,2.565
143,2.385
144,2.360
145,2.768
146,3.172
147,2.754
148,2.758
149,2.474
150,2.995
151,2.903
152,3.398
153,2.484
154,2.894
155,3.022
156,2.413
157,3.517
158,3.370
159,2.854
160,2.485
161,3.058
162,2.473
163,3.390
164,3.023
165,2.543
166,2.629
167,2.929
168,2.928
169,3.268
170,2.622
171,2.764
172,2.920
173,2.681
174,2.551
175,3.492
176,2.534
177,2.741
178,2.949
179,2.554
180,2.596
181,3.522
182,3.207
183,2.722
184,2.945
185,2.474
186,2.934
187,3.447
188,2.515
189,2.317
190,3.059
191,2.542
192,3.417
193,2.737
194,2.456
195,3.025
196,2.640
197,2.601
198,3.567
199,2.350
200,2.581
201,3.079
202,2.514
203,2.462
204,3.725
205,3.730
206,2.670
207,2.308
208,2.689
209,2.565
210,3.479
211,2.604
212,3.339
213,2.373
214,2.678
215,3.340
216,2.867
217,2.751
218,2.747
219,2.410
220,2.485
221,2.594
222,3.602
223,2.689
224,2.565
225,2.397
226,2.562
227,2.598
228,3.403
229,3.303
230,2.775
231,2.101
232,2.499
233,2.991
234,3.059
235,3.210
236,2.568
237,2.066
238,2.498
239,2.572
240,3.281
241,2.676
242,2.640
243,2.867
244,2.418
245,2.493
246,3.126
247,2.845
248,2.522
249,2.459
250,2.524
251,2.466
252,3.060
253,3.848
254,2.516
255,2.460
256,2.499
257,2.427
258,3.463
259,2.761
260,2.674
261,2.450
262,2.491
263,2.543
264,2.732
265,3.679
266,2.325
267,2.529
268,2.344
269,2.534
270,2.691
271,3.176
272,2.492
273,2.721
274,2.587
275,2.594
276,2.326
277,3.434
278,3.514
279,2.415
280,2.481
281,2.478
282,2.555
283,3.303
284,3.098
285,2.451
286,2.552
287,2.413
288,2.613
289,3.194
290,3.191
291,2.338
292,2.561
293,2.785
294,2.240
295,3.324
296,2.767
297,2.589
298,2.608
299,2.432
300,2.444
301,2.968
302,3.792
303,2.590
304,2.335
305,2.520
306,2.435
307,3.613
308,2.681
309,2.692
310,2.329
311,2.580
312,2.355
313,3.084
314,3.026
315,2.551
316,2.490
317,2.481
318,2.553
319,2.619
320,3.350
321,2.885
322,2.576
323,2.456
324,2.441
325,3.223
326,3.031
327,3.055
328,2.592
329,2.499
330,2.354
331,2.573
332,3.323
333,3.357
334,2.241
335,2.319
336,2.472
337,2.609
338,3.565
339,2.607
340,2.539
341,2.440
342,2.483
343,2.626
344,3.407
345,2.772
346,2.491
347,2.456
348,2.553
349,2.773
350,3.239
351,4.079
352,2.346
353,2.177
354,2.562
355,2.350
356,3.329
357,3.383
358,2.441
359,2.399
360,2.530
361,2.455
362,3.219
363,2.879
364,2.726
365,2.418
366,2.511
367,2.544
368,3.077
369,2.926
370,2.571
371,2.595
372,2.534
373,2.367
374,2.671
375,4.222
376,2.411
377,2.569
378,2.493
379,2.464
380,2.691
381,3.474
382,2.697
383,2.541
384,2.494
385,2.476
386,2.473
387,3.464
388,3.084
389,2.144
390,2.503
391,2.501
392,2.525
393,3.335
394,2.919
395,2.334
396,2.557
397,2.579
398,2.567
399,4.120
400,3.297
401,2.561
402,2.428
403,2.495
404,2.729
405,3.752
406,2.783
407,2.509
408,2.337
409,2.589
410,2.556
411,3.449
412,2.702
413,2.742
414,2.384
415,2.759
416,2.290
417,3.374
418,2.934
419,2.546
420,2.228
421,2.672
422,2.369
423,3.442
424,3.484
425,2.621
426,2.279
427,2.529
428,2.889
429,2.910
430,2.981
431,2.957
432,2.420
433,2.398
434,2.310
435,3.662
436,2.422
437,2.676
438,2.557
439,2.527
440,2.564
441,2.649
442,3.168
443,2.499
444,2.737
445,2.637
446,2.509
447,2.716
448,3.845
449,2.654
450,2.536
451,2.366
452,2.526
453,2.906
454,3.101
455,2.809
456,2.466
457,2.502
458,2.767
459,2.486
460,3.137
461,3.402
462,2.187
463,2.398
464,2.392
465,2.614
466,3.371
467,2.847
468,2.463
469,2.639
470,2.288
471,2.562
472,3.381
473,3.491
474,2.521
475,2.397
476,2.431
477,2.759
478,3.222
479,2.957
480,2.470
481,2.403
482,2.560
483,2.470
484,3.451
485,2.905
486,2.583
487,2.329
488,2.798
489,2.289
490,2.882
491,2.903
492,2.627
493,2.897
494,2.321
495,2.472
496,2.882
497,3.844
498,3.096
499,2.525
500,2.250
501,2.477
502,2.728
503,3.391
504,2.539
505,2.635
506,2.542
507,2.435
508,3.011
509,3.042
510,2.965
511,2.273
512,2.433
513,3.020
514,2.776
515,3.646
516,2.856
517,2.886
518,2.522
519,2.528
520,4.396
521,3.397
522,2.218
523,2.433
524,2.605
525,3.504
526,3.087
527,3.186
528,2.343
529,2.433
530,2.900
531,3.000
532,3.511
533,2.663
534,2.699
535,2.423
536,3.136
537,2.802
538,3.151
539,2.507
540,2.973
541,2.325
542,3.322
543,3.260
544,3.525
545,2.846
546,2.125
547,2.697
548,2.829
549,3.389
550,2.758
551,2.866
552,2.338
553,3.115
554,2.500
555,3.387
556,2.851
557,2.511
558,2.459
559,3.107
560,2.521
561,3.308
562,2.782
563,2.810
564,2.323
565,3.259
566,2.366
567,3.542
568,2.929
569,2.299
570,2.336
571,3.027
572,2.540
573,3.409
574,2.784
575,2.444
576,2.437
577,2.734
578,2.591
579,3.845
580,3.212
581,2.802
582,2.370
583,2.704
584,2.624
585,4.023
586,2.360
587,2.759
588,2.511
589,2.608
590,2.922
591,3.081
592,3.271
593,2.471
594,2.516
595,2.474
596,2.814
597,3.127
598,2.537
599,3.080
600,2.341
601,3.027
602,2.766
603,2.984
604,2.450
605,2.922
606,2.481
607,2.616
608,2.541
609,3.462
610,2.971
611,2.955
612,2.258
613,2.682
614,2.770
615,3.119
616,2.792
617,2.598
618,2.260
619,2.441
620,2.536
621,3.425
622,2.958
623,2.722
624,2.099
625,2.400
626,2.570
627,3.295
628,2.919
629,2.737
630,2.311
631,2.408
632,2.514
633,3.325
634,2.767
635,2.724
636,2.288
637,2.680
638,2.347
639,2.902
640,3.058
641,2.770
642,2.522
643,2.406
644,2.539
645,2.753
646,3.215
647,2.636
648,2.639
649,2.666
650,2.392
651,2.408
652,3.515
653,2.687
654,2.589
655,2.428
656,2.375
657,2.619
658,3.308
659,2.664
660,2.752
661,2.456
662,2.365
663,2.533
664,3.354
665,2.812
666,2.684
667,2.349
668,2.441
669,2.714
670,2.769
671,3.368
672,2.624
673,2.308
674,2.365
675,2.634
676,2.617
677,3.350
678,2.733
679,2.623
680,2.462
681,2.494
682,2.460
683,3.463
684,2.537
685,2.628
686,2.674
687,2.381
688,2.516
689,3.586
690,2.681
691,2.676
692,2.289
693,2.726
694,2.303
695,2.934
696,3.339
697,2.606
698,2.187
699,2.687
700,2.328
701,3.062
702,2.930
703,2.871
704,2.313
705,2.582
706,2.464
707,2.521
708,3.304
709,2.492
710,2.723
711,2.587
712,2.608
713,2.574
714,4.002
715,3.011
716,2.227
717,2.374
718,2.343
719,2.541
720,3.580
721,2.854
1 frame ms
2 0 2.607
3 1 2.532
4 2 2.324
5 3 3.432
6 4 2.808
7 5 2.870
8 6 2.367
9 7 2.311
10 8 2.756
11 9 3.278
12 10 2.418
13 11 2.665
14 12 2.438
15 13 2.646
16 14 2.461
17 15 2.941
18 16 2.975
19 17 3.164
20 18 2.766
21 19 2.341
22 20 2.543
23 21 3.395
24 22 2.772
25 23 2.575
26 24 2.737
27 25 2.427
28 26 2.538
29 27 2.708
30 28 3.183
31 29 2.734
32 30 2.425
33 31 2.546
34 32 2.600
35 33 2.545
36 34 3.705
37 35 2.563
38 36 2.907
39 37 2.368
40 38 2.470
41 39 2.411
42 40 3.778
43 41 3.735
44 42 2.292
45 43 2.458
46 44 2.566
47 45 3.044
48 46 3.449
49 47 2.914
50 48 3.243
51 49 2.084
52 50 3.872
53 51 1.633
54 52 3.389
55 53 2.448
56 54 2.474
57 55 2.509
58 56 2.346
59 57 3.192
60 58 2.762
61 59 2.788
62 60 2.538
63 61 2.520
64 62 2.517
65 63 3.036
66 64 3.205
67 65 3.080
68 66 2.514
69 67 2.429
70 68 2.515
71 69 2.963
72 70 3.555
73 71 2.430
74 72 2.742
75 73 2.435
76 74 2.526
77 75 3.304
78 76 3.511
79 77 2.477
80 78 2.472
81 79 2.452
82 80 2.421
83 81 3.334
84 82 3.286
85 83 2.725
86 84 2.411
87 85 2.597
88 86 2.440
89 87 3.213
90 88 3.411
91 89 3.047
92 90 2.365
93 91 2.530
94 92 2.877
95 93 3.249
96 94 3.186
97 95 2.684
98 96 2.304
99 97 2.406
100 98 2.948
101 99 3.652
102 100 2.822
103 101 2.552
104 102 2.575
105 103 2.354
106 104 2.676
107 105 2.775
108 106 3.865
109 107 2.480
110 108 2.501
111 109 2.675
112 110 2.724
113 111 3.671
114 112 2.828
115 113 3.064
116 114 2.153
117 115 2.752
118 116 2.936
119 117 3.008
120 118 2.932
121 119 2.648
122 120 2.441
123 121 3.471
124 122 1.885
125 123 4.435
126 124 2.504
127 125 3.241
128 126 2.813
129 127 2.445
130 128 3.321
131 129 3.055
132 130 3.222
133 131 2.766
134 132 2.582
135 133 2.597
136 134 3.637
137 135 3.150
138 136 3.163
139 137 2.675
140 138 2.708
141 139 2.581
142 140 3.377
143 141 3.518
144 142 2.565
145 143 2.385
146 144 2.360
147 145 2.768
148 146 3.172
149 147 2.754
150 148 2.758
151 149 2.474
152 150 2.995
153 151 2.903
154 152 3.398
155 153 2.484
156 154 2.894
157 155 3.022
158 156 2.413
159 157 3.517
160 158 3.370
161 159 2.854
162 160 2.485
163 161 3.058
164 162 2.473
165 163 3.390
166 164 3.023
167 165 2.543
168 166 2.629
169 167 2.929
170 168 2.928
171 169 3.268
172 170 2.622
173 171 2.764
174 172 2.920
175 173 2.681
176 174 2.551
177 175 3.492
178 176 2.534
179 177 2.741
180 178 2.949
181 179 2.554
182 180 2.596
183 181 3.522
184 182 3.207
185 183 2.722
186 184 2.945
187 185 2.474
188 186 2.934
189 187 3.447
190 188 2.515
191 189 2.317
192 190 3.059
193 191 2.542
194 192 3.417
195 193 2.737
196 194 2.456
197 195 3.025
198 196 2.640
199 197 2.601
200 198 3.567
201 199 2.350
202 200 2.581
203 201 3.079
204 202 2.514
205 203 2.462
206 204 3.725
207 205 3.730
208 206 2.670
209 207 2.308
210 208 2.689
211 209 2.565
212 210 3.479
213 211 2.604
214 212 3.339
215 213 2.373
216 214 2.678
217 215 3.340
218 216 2.867
219 217 2.751
220 218 2.747
221 219 2.410
222 220 2.485
223 221 2.594
224 222 3.602
225 223 2.689
226 224 2.565
227 225 2.397
228 226 2.562
229 227 2.598
230 228 3.403
231 229 3.303
232 230 2.775
233 231 2.101
234 232 2.499
235 233 2.991
236 234 3.059
237 235 3.210
238 236 2.568
239 237 2.066
240 238 2.498
241 239 2.572
242 240 3.281
243 241 2.676
244 242 2.640
245 243 2.867
246 244 2.418
247 245 2.493
248 246 3.126
249 247 2.845
250 248 2.522
251 249 2.459
252 250 2.524
253 251 2.466
254 252 3.060
255 253 3.848
256 254 2.516
257 255 2.460
258 256 2.499
259 257 2.427
260 258 3.463
261 259 2.761
262 260 2.674
263 261 2.450
264 262 2.491
265 263 2.543
266 264 2.732
267 265 3.679
268 266 2.325
269 267 2.529
270 268 2.344
271 269 2.534
272 270 2.691
273 271 3.176
274 272 2.492
275 273 2.721
276 274 2.587
277 275 2.594
278 276 2.326
279 277 3.434
280 278 3.514
281 279 2.415
282 280 2.481
283 281 2.478
284 282 2.555
285 283 3.303
286 284 3.098
287 285 2.451
288 286 2.552
289 287 2.413
290 288 2.613
291 289 3.194
292 290 3.191
293 291 2.338
294 292 2.561
295 293 2.785
296 294 2.240
297 295 3.324
298 296 2.767
299 297 2.589
300 298 2.608
301 299 2.432
302 300 2.444
303 301 2.968
304 302 3.792
305 303 2.590
306 304 2.335
307 305 2.520
308 306 2.435
309 307 3.613
310 308 2.681
311 309 2.692
312 310 2.329
313 311 2.580
314 312 2.355
315 313 3.084
316 314 3.026
317 315 2.551
318 316 2.490
319 317 2.481
320 318 2.553
321 319 2.619
322 320 3.350
323 321 2.885
324 322 2.576
325 323 2.456
326 324 2.441
327 325 3.223
328 326 3.031
329 327 3.055
330 328 2.592
331 329 2.499
332 330 2.354
333 331 2.573
334 332 3.323
335 333 3.357
336 334 2.241
337 335 2.319
338 336 2.472
339 337 2.609
340 338 3.565
341 339 2.607
342 340 2.539
343 341 2.440
344 342 2.483
345 343 2.626
346 344 3.407
347 345 2.772
348 346 2.491
349 347 2.456
350 348 2.553
351 349 2.773
352 350 3.239
353 351 4.079
354 352 2.346
355 353 2.177
356 354 2.562
357 355 2.350
358 356 3.329
359 357 3.383
360 358 2.441
361 359 2.399
362 360 2.530
363 361 2.455
364 362 3.219
365 363 2.879
366 364 2.726
367 365 2.418
368 366 2.511
369 367 2.544
370 368 3.077
371 369 2.926
372 370 2.571
373 371 2.595
374 372 2.534
375 373 2.367
376 374 2.671
377 375 4.222
378 376 2.411
379 377 2.569
380 378 2.493
381 379 2.464
382 380 2.691
383 381 3.474
384 382 2.697
385 383 2.541
386 384 2.494
387 385 2.476
388 386 2.473
389 387 3.464
390 388 3.084
391 389 2.144
392 390 2.503
393 391 2.501
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Docs/perf/0.2.0-walk-frametimes.csv
+760
View File
@@ -0,0 +1,760 @@
frame,ms
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1 frame ms
2 0 2.428
3 1 2.633
4 2 2.238
5 3 3.606
6 4 2.431
7 5 2.649
8 6 4.050
9 7 2.011
10 8 2.735
11 9 3.390
12 10 2.901
13 11 2.237
14 12 2.686
15 13 2.383
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17 15 3.412
18 16 2.458
19 17 2.474
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21 19 2.556
22 20 2.478
23 21 3.150
24 22 2.667
25 23 2.349
26 24 2.568
27 25 2.580
28 26 2.393
29 27 2.575
30 28 3.132
31 29 2.536
32 30 2.508
33 31 2.710
34 32 2.348
35 33 2.537
36 34 2.820
37 35 3.162
38 36 2.163
39 37 2.562
40 38 2.619
41 39 2.323
42 40 2.628
43 41 3.075
44 42 2.512
45 43 2.448
46 44 2.505
47 45 2.454
48 46 2.607
49 47 3.128
50 48 2.476
51 49 2.562
52 50 2.434
53 51 3.385
54 52 2.076
55 53 3.435
56 54 2.672
57 55 2.550
58 56 1.998
59 57 2.583
60 58 2.518
61 59 2.777
62 60 3.920
63 61 2.934
64 62 2.675
65 63 2.320
66 64 2.309
67 65 2.520
68 66 3.947
69 67 2.596
70 68 2.708
71 69 2.291
72 70 2.404
73 71 2.551
74 72 3.715
75 73 2.100
76 74 2.539
77 75 2.682
78 76 2.273
79 77 2.442
80 78 3.952
81 79 2.233
82 80 2.374
83 81 2.686
84 82 2.407
85 83 2.654
86 84 3.613
87 85 2.320
88 86 2.685
89 87 2.744
90 88 2.357
91 89 2.565
92 90 3.756
93 91 2.672
94 92 2.128
95 93 2.583
96 94 2.546
97 95 2.391
98 96 2.935
99 97 3.624
100 98 1.934
101 99 2.509
102 100 2.603
103 101 2.449
104 102 2.802
105 103 3.678
106 104 2.336
107 105 2.509
108 106 2.551
109 107 2.576
110 108 2.997
111 109 3.208
112 110 2.301
113 111 2.359
114 112 2.484
115 113 2.646
116 114 2.801
117 115 3.226
118 116 2.635
119 117 2.325
120 118 2.501
121 119 2.602
122 120 2.564
123 121 3.151
124 122 3.149
125 123 2.235
126 124 2.596
127 125 2.432
128 126 2.665
129 127 2.648
130 128 3.884
131 129 2.087
132 130 2.375
133 131 2.586
134 132 2.734
135 133 2.338
136 134 3.617
137 135 2.418
138 136 2.350
139 137 2.713
140 138 2.758
141 139 2.239
142 140 3.585
143 141 2.565
144 142 2.787
145 143 2.115
146 144 2.435
147 145 2.489
148 146 3.062
149 147 2.958
150 148 2.402
151 149 2.425
152 150 2.516
153 151 2.505
154 152 2.543
155 153 3.690
156 154 2.060
157 155 2.510
158 156 2.428
159 157 2.603
160 158 2.491
161 159 3.178
162 160 2.496
163 161 2.424
164 162 2.495
165 163 2.667
166 164 2.434
167 165 3.040
168 166 2.949
169 167 2.094
170 168 2.510
171 169 2.586
172 170 2.395
173 171 3.004
174 172 3.009
175 173 2.288
176 174 2.548
177 175 2.337
178 176 2.598
179 177 2.498
180 178 3.526
181 179 2.533
182 180 2.134
183 181 2.560
184 182 2.541
185 183 2.436
186 184 2.635
187 185 3.361
188 186 2.261
189 187 2.566
190 188 2.383
191 189 2.529
192 190 2.645
193 191 3.190
194 192 2.523
195 193 2.523
196 194 2.346
197 195 2.865
198 196 2.348
199 197 2.879
200 198 3.657
201 199 1.824
202 200 2.551
203 201 2.449
204 202 2.607
205 203 3.085
206 204 3.163
207 205 2.404
208 206 2.327
209 207 2.553
210 208 2.576
211 209 2.544
212 210 3.193
213 211 2.647
214 212 2.332
215 213 2.544
216 214 2.767
217 215 2.429
218 216 3.103
219 217 2.861
220 218 2.318
221 219 2.552
222 220 2.587
223 221 2.352
224 222 3.128
225 223 2.621
226 224 2.461
227 225 2.422
228 226 2.601
229 227 2.748
230 228 2.545
231 229 3.224
232 230 2.206
233 231 2.459
234 232 2.530
235 233 2.461
236 234 2.570
237 235 3.271
238 236 2.405
239 237 2.424
240 238 2.671
241 239 2.450
242 240 2.644
243 241 2.510
244 242 3.023
245 243 2.461
246 244 2.618
247 245 2.350
248 246 2.551
249 247 2.472
250 248 3.642
251 249 2.576
252 250 2.548
253 251 3.599
254 252 1.992
255 253 2.424
256 254 3.752
257 255 2.241
258 256 2.360
259 257 2.522
260 258 2.584
261 259 2.653
262 260 2.871
263 261 2.827
264 262 2.369
265 263 2.482
266 264 2.599
267 265 2.294
268 266 2.686
269 267 3.428
270 268 2.240
271 269 2.435
272 270 2.468
273 271 2.619
274 272 2.519
275 273 3.247
276 274 2.539
277 275 2.442
278 276 2.518
279 277 2.489
280 278 2.463
281 279 2.839
282 280 2.907
283 281 2.786
284 282 2.211
285 283 2.615
286 284 2.378
287 285 2.671
288 286 3.219
289 287 2.435
290 288 2.509
291 289 2.323
292 290 2.502
293 291 2.526
294 292 3.292
295 293 2.468
296 294 2.526
297 295 2.500
298 296 2.431
299 297 2.481
300 298 2.921
301 299 3.009
302 300 2.415
303 301 2.600
304 302 2.344
305 303 2.533
306 304 2.618
307 305 3.458
308 306 2.455
309 307 2.469
310 308 2.495
311 309 2.568
312 310 2.473
313 311 3.179
314 312 2.694
315 313 2.503
316 314 2.587
317 315 2.317
318 316 2.609
319 317 2.590
320 318 3.211
321 319 2.392
322 320 2.490
323 321 2.515
324 322 2.496
325 323 2.483
326 324 3.157
327 325 2.540
328 326 2.422
329 327 2.574
330 328 2.468
331 329 2.547
332 330 2.788
333 331 3.075
334 332 2.231
335 333 2.537
336 334 2.577
337 335 2.584
338 336 2.473
339 337 3.415
340 338 2.126
341 339 2.506
342 340 2.374
343 341 2.721
344 342 2.418
345 343 3.259
346 344 2.509
347 345 2.519
348 346 2.436
349 347 2.472
350 348 2.504
351 349 2.858
352 350 3.250
353 351 2.161
354 352 2.586
355 353 2.376
356 354 2.651
357 355 2.504
358 356 3.399
359 357 2.353
360 358 2.381
361 359 2.513
362 360 2.633
363 361 2.566
364 362 3.615
365 363 2.593
366 364 2.084
367 365 2.411
368 366 2.653
369 367 2.521
370 368 2.825
371 369 2.891
372 370 2.576
373 371 2.302
374 372 2.582
375 373 2.513
376 374 2.598
377 375 3.790
378 376 2.352
379 377 2.306
380 378 2.434
381 379 2.514
382 380 2.708
383 381 2.978
384 382 2.813
385 383 2.327
386 384 2.502
387 385 2.446
388 386 2.605
389 387 3.033
390 388 3.091
391 389 2.206
392 390 2.648
393 391 2.732
394 392 2.296
395 393 3.406
396 394 2.490
397 395 2.424
398 396 2.443
399 397 2.601
400 398 2.628
401 399 2.477
402 400 3.241
403 401 2.573
404 402 2.422
405 403 2.384
406 404 2.505
407 405 2.575
408 406 2.909
409 407 2.897
410 408 2.486
411 409 2.431
412 410 2.691
413 411 2.342
414 412 2.733
415 413 3.518
416 414 2.391
417 415 2.160
418 416 2.671
419 417 2.505
420 418 2.241
421 419 3.355
422 420 2.775
423 421 2.395
424 422 2.864
425 423 2.290
426 424 2.469
427 425 2.977
428 426 2.759
429 427 2.460
430 428 2.456
431 429 2.497
432 430 2.362
433 431 2.874
434 432 2.812
435 433 2.559
436 434 2.283
437 435 2.670
438 436 2.482
439 437 2.495
440 438 3.118
441 439 3.018
442 440 2.252
443 441 3.222
444 442 2.483
445 443 2.436
446 444 3.209
447 445 3.169
448 446 2.455
449 447 2.432
450 448 2.464
451 449 2.500
452 450 2.967
453 451 2.958
454 452 2.390
455 453 2.494
456 454 2.523
457 455 2.473
458 456 2.516
459 457 3.527
460 458 2.262
461 459 2.377
462 460 2.840
463 461 2.135
464 462 2.520
465 463 3.285
466 464 2.940
467 465 2.256
468 466 2.496
469 467 2.705
470 468 2.395
471 469 3.031
472 470 3.104
473 471 2.411
474 472 2.630
475 473 2.468
476 474 2.416
477 475 2.559
478 476 2.732
479 477 2.441
480 478 2.624
481 479 2.536
482 480 2.458
483 481 2.516
484 482 2.507
485 483 2.606
486 484 2.616
487 485 2.881
488 486 2.358
489 487 2.469
490 488 2.513
491 489 3.250
492 490 2.606
493 491 2.545
494 492 2.407
495 493 2.437
496 494 2.663
497 495 3.346
498 496 2.349
499 497 2.481
500 498 2.613
501 499 2.483
502 500 2.417
503 501 2.923
504 502 3.059
505 503 2.483
506 504 2.373
507 505 2.525
508 506 2.530
509 507 2.431
510 508 2.917
511 509 2.559
512 510 2.623
513 511 3.172
514 512 2.304
515 513 2.331
516 514 3.287
517 515 2.544
518 516 2.429
519 517 2.690
520 518 2.464
521 519 2.406
522 520 2.804
523 521 2.899
524 522 2.461
525 523 2.536
526 524 2.414
527 525 2.380
528 526 2.616
529 527 3.236
530 528 2.499
531 529 2.558
532 530 2.584
533 531 2.309
534 532 2.447
535 533 3.039
536 534 3.133
537 535 2.170
538 536 2.583
539 537 2.505
540 538 2.666
541 539 2.567
542 540 3.307
543 541 2.177
544 542 2.495
545 543 2.441
546 544 2.638
547 545 2.521
548 546 3.527
549 547 2.460
550 548 2.362
551 549 2.520
552 550 2.439
553 551 2.572
554 552 3.087
555 553 2.707
556 554 2.475
557 555 2.283
558 556 2.604
559 557 2.529
560 558 3.094
561 559 3.051
562 560 2.085
563 561 2.365
564 562 2.711
565 563 2.351
566 564 2.572
567 565 2.979
568 566 2.805
569 567 2.373
570 568 2.744
571 569 2.340
572 570 2.285
573 571 2.791
574 572 3.447
575 573 2.208
576 574 2.518
577 575 2.448
578 576 3.917
579 577 1.540
580 578 2.923
581 579 2.632
582 580 2.404
583 581 2.582
584 582 2.508
585 583 2.413
586 584 3.602
587 585 2.342
588 586 2.482
589 587 2.584
590 588 3.062
591 589 2.070
592 590 2.726
593 591 2.937
594 592 2.385
595 593 2.734
596 594 2.188
597 595 2.582
598 596 2.487
599 597 3.339
600 598 2.535
601 599 2.414
602 600 2.459
603 601 2.510
604 602 2.547
605 603 3.414
606 604 2.314
607 605 2.399
608 606 2.550
609 607 2.541
610 608 2.355
611 609 2.709
612 610 3.067
613 611 2.502
614 612 2.467
615 613 2.899
616 614 2.177
617 615 2.719
618 616 3.049
619 617 2.673
620 618 2.259
621 619 2.566
622 620 2.383
623 621 2.420
624 622 3.318
625 623 2.807
626 624 2.348
627 625 2.595
628 626 2.433
629 627 2.569
630 628 2.620
631 629 2.652
632 630 3.140
633 631 2.945
634 632 2.571
635 633 2.546
636 634 2.428
637 635 3.436
638 636 2.393
639 637 2.491
640 638 2.511
641 639 2.485
642 640 2.603
643 641 3.363
644 642 2.442
645 643 2.344
646 644 2.462
647 645 2.508
648 646 2.617
649 647 2.909
650 648 2.824
651 649 2.528
652 650 2.424
653 651 2.511
654 652 2.517
655 653 2.583
656 654 3.331
657 655 2.436
658 656 2.455
659 657 2.380
660 658 2.570
661 659 2.582
662 660 2.789
663 661 2.917
664 662 2.526
665 663 2.538
666 664 2.447
667 665 2.423
668 666 2.695
669 667 3.143
670 668 2.616
671 669 2.126
672 670 2.596
673 671 2.464
674 672 3.092
675 673 2.681
676 674 2.641
677 675 2.311
678 676 2.551
679 677 2.551
680 678 2.837
681 679 2.532
682 680 3.006
683 681 2.289
684 682 2.521
685 683 2.556
686 684 2.593
687 685 2.552
688 686 3.173
689 687 2.415
690 688 2.429
691 689 2.733
692 690 2.286
693 691 2.476
694 692 3.256
695 693 2.897
696 694 2.528
697 695 2.377
698 696 2.518
699 697 2.504
700 698 3.074
701 699 2.814
702 700 2.433
703 701 2.338
704 702 2.476
705 703 2.458
706 704 3.141
707 705 2.551
708 706 2.717
709 707 2.300
710 708 2.527
711 709 2.446
712 710 2.469
713 711 2.866
714 712 2.776
715 713 2.507
716 714 2.457
717 715 2.520
718 716 2.450
719 717 2.568
720 718 3.192
721 719 2.471
722 720 2.790
723 721 2.337
724 722 2.548
725 723 2.435
726 724 3.313
727 725 2.274
728 726 2.461
729 727 2.451
730 728 2.556
731 729 2.546
732 730 2.869
733 731 3.308
734 732 2.293
735 733 2.428
736 734 2.686
737 735 2.562
738 736 2.523
739 737 3.309
740 738 2.311
741 739 2.498
742 740 2.485
743 741 2.568
744 742 2.392
745 743 3.260
746 744 2.534
747 745 2.550
748 746 2.355
749 747 2.768
750 748 2.319
751 749 3.039
752 750 2.721
753 751 2.490
754 752 2.378
755 753 2.539
756 754 2.823
757 755 2.480
758 756 3.533
759 757 2.285
760 758 2.365
Docs/release-checks.md
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@@ -42,8 +42,11 @@ Measured at 1440p on the development workstation: Bazzite, Ryzen 7 7700X, 64 GB
| `0.1.0` | Placement vs references | PASS (with deliberate simplifications) | Section below, 2026-11-08 | 2026-11-08 |
| `0.1.0` | Collision and packaging | PASS — no blocking collision, no invisible walls, no seam gaps (see audit note) | `-qaselftest` on the packaged build, 2026-11-08 | 2026-11-08 |
| `0.1.0` | 60 FPS at 1440p | PASS — 2.42 ms avg (414 fps), p99 3.01 ms at 2560×1440, TSR on, VSync off, no FG | `-qaselftest` perf capture, `Docs/perf/0.1.0-walk-frametimes.csv` | 2026-11-08 |
| `0.2.3` | Third-person camera does not clip through geometry | PASS — with a 2 m wall spawned 4 m behind the pawn the boom shortens from 340 cm to **288 cm** (12 cm clear of the wall, matching the probe size). `-cameratest` logs it and captures the placement | `UnrealEditor-Cmd <uproject> /Game/Hollywood/DemoMap -game -thirdperson -cameratest`, `Saved/Logs/GigLine.log` | 2026-11-09 |
| `0.2.0` | 60 FPS at 1440p | PASS — 2.64 ms avg (379 fps), p50 2.54, p95 3.39, p99 3.76, max 4.05 ms at 2560×1440, TSR on, VSync off, no FG | `-qaselftest` perf capture, `Docs/perf/0.2.0-walk-frametimes.csv` | 2026-11-09 |
| `0.2.0` | Debug overlay cost | PASS — same route with the F3 overlay drawn: 2.77 ms avg (361 fps), p50 2.64, p95 3.52, p99 3.87, max 4.43 ms; about **5 %** heavier, still 6× the floor. The overlay is on for `-perf`/`-qaselftest`, off in the built demo | `Docs/perf/0.2.0-walk-frametimes-overlay.csv` | 2026-11-09 |
| `0.1.0` | Fresh checkout build | PASS — clean clone of `main` (`4bc41e9`), `git lfs pull` + `check-lfs.sh` OK (130 LFS files), both `GigLineEditor` and `GigLine` targets built with the documented engine | `/tmp/fresh-check`, 2026-11-08 | 2026-11-08 |
| `0.1.0` | Packaged Linux build | PASS — packaged Development build launches straight into DemoMap, no missing-asset/linker errors; controls shown in-game and in `Docs/controls.md` | `Docs/perf/0.1.0-packaged-hud-controls.png`, 2026-11-08 | 2026-11-08 |
| `0.1.0` | Packaged Linux build | PASS — packaged Development build launches straight into DemoMap, no missing-asset/linker errors; controls shown in-game and in `Docs/controls.md` | measurement recorded 2026-11-08; the capture was removed from the repository 2026-11-09 | 2026-11-08 |
## `0.1.0` — Placement vs references — record (2026-11-08)
@@ -175,6 +178,6 @@ Engine/Build/BatchFiles/Linux/Build.sh GigLine Linux Development \
- `Docs/controls.md` — full binding table (WASD, mouse look, Space, R, Esc) plus how to test input headlessly.
- `AGigLineHUD` now draws a control legend bottom-right every frame: "WASD move · Mouse look · Space jump · R reset · Esc pause".
- Verified in the packaged capture: the bottom-right text bbox is 426×12 px (a single right-aligned line), attributed text bottom-left. Screenshot: `Docs/perf/0.1.0-packaged-hud-controls.png`.
- Measured in the packaged build on 2026-11-08: the bottom-right text bbox was 426×12 px (a single right-aligned line), attributed text bottom-left. The capture has since been removed from the repository, so the numbers stand as the record.
**Verdict: PASS.**
Docs/reviews/0.1.4-review.md
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# `0.1.4` façade review — signoff
Four demo-map captures from the `facades-0.1.4` branch, after the module kit, the textured materials and the theatre marquee went in. **All seven items signed off 2026-11-09** (owner review of the local renders).
Reference photographs to compare against: `Art/reference/hollywood/` and `Art/reference/el-capitan-*` (local, not committed). Regenerate the set with `Tools/render_screenshots.sh --verify`; measure it with `python3 Tools/visual_loop.py --compare --iteration 5`.
## Signoff
- [x] **1. Block from the north sidewalk** — hero between its neighbours, sidewalk and road read correctly
- [x] **2. Street level** — colonnade, shopfronts and window rhythm hold up at eye height
- [x] **3. Crossing** — zebra bars, kerb line and the frontage behind
- [x] **4. North buildings** — TCL and Tussaud's framed across the boulevard
- [x] **5. Materials** — stone reads as coursed stone, glazing as glass, not flat colour
- [x] **6. Theatre trim** — marquee and blade sign proportions believable at street level
- [x] **7. Approve** `v0.1.4` (kit + materials + theatre trim); remaining geometry moves to the next version
## 1. Block from the north sidewalk
![Block from the north sidewalk](../../Screenshots/demo/review-demo-spawn-view.png)
Expected: the neoclassical hero façade between its neighbours, both sidewalks and the road in the foreground. _Metric: 0.68 similarity, edges 0.28× reference._
## 2. Street level
![Street level](../../Screenshots/demo/review-demo-street-level.png)
Expected: the hero colonnade with adjacent frontage buildings either side, shopfronts at pavement level, 4.96 m bay rhythm. _Metric: 0.33, edges 0.27×._
## 3. The designated crossing
![Crossing](../../Screenshots/demo/review-demo-crossing.png)
Expected: continental zebra bars on the asphalt at s=130 m, south frontage and colonnade behind. _Metric: 0.42, edges 0.34×._
## 4. North-side buildings
![North buildings](../../Screenshots/demo/review-demo-north-buildings.png)
Expected: TCL Chinese Theatre and Madame Tussaud's across Hollywood Blvd, full height in frame. _Metric: 0.34, edges 0.14×._
---
## Appendix — what was checked, and what was broken
### Verified
- **Behaviour**, packaged build, `-qaselftest`: walk 761 cm in 2 s (Z steady 456), reset 0 cm, pause/unpause, seam transect 1456 samples / **0 holes**, wall probe **0/35**, façade occlusion probe **0/9** — all PASS. Run twice: the harness is time-based and one loaded run reported a false failure (`walk 246 cm`, `pause FAIL`), an immediate re-run passed — re-run before believing a single FAIL.
- **Placement**, probed from the live map against `Geo/verification/2026-11-06-el-capitan-block.md`: 6922 −24276…−17700, 6902 −17749…−14591, **hero −14644…−12028 between them**, theatre −12082…−8210, 6822 / 6806 / 6800 −7854…−1437, TCL −22889…−18442, Tussaud's −27071…−22799. Blockout affine residual **0.0 cm**.
- **Budgets**: hero 148 parts / 3 044 tris · kit 16 meshes × 12 tris · 625 kit actors ≈ 7 500 tris · 8 × 512² textures (196 KB) · 67 tool tests pass.
- **Topology**: every kit piece manifold, no loose geometry.
### Defects found this cycle
Every one of these rendered convincingly; the placement ones were caught by coordinate probes, not by looking.
| Sev | Defect | Root cause |
| --- | --- | --- |
| Blocker | Frontage shifted ≈119 m X / 2.4 m Y, hero outside its gap | Blockout regenerated without `--origin` |
| Blocker | Kit placed ~12 km from its buildings | Used mesh-local bbox; actors carry the offset |
| Blocker | Marquee on the far side of the boulevard | Blender +Y is Unreal −Y |
| Major | Marquee canopy 5 cm above the pavement | Absolute Z; pavement is 4.56 m above datum |
| Major | Window bays invisible, inside the solid wall | Piece modelled entirely at +Y |
| Major | Glazing wasn't glass | Grey `M_Kit_*` from the FBX import, never overridden |
| Major | Hero windows floated 1.44 m in front of the wall | Wrong Y in the builder |
| Major | Parapet medallions were discs on the coping | Built with the Z-axis cylinder helper |
| Major | Hero had no usable collision | Complex-only; traces use simple |
| Minor | "No smoothing group information" on every import | `mesh_smooth_type="OFF"` in six exporters |
| Minor | `save_map()` returned False silently | LFS `.umap` read-only, importer never chmod'd |
| Minor | North-buildings import silently no-op | Missing `import sys` |
| Minor | Kit folder held 24 assets (8 orphan materials) | No stale-asset sweep |
| Minor | Edge-density metric counted PIL's border ring | `FIND_EDGES` leaves a 128 ring |
| Minor | QA wall probe grazed the theatre wall | Scan row 1 cm from the building line |
### Limitations worth knowing
- Kit pieces are boxes; dentil spacing, abacus and plinth dimensions are recorded assumptions, not measurements.
- Textures are generated, not authored — no decals, signage text or weathering.
- The vision pre-check stays advisory: it has rejected shots the owner approved.
- The low edge ratios in the metrics are partly structural — a wide block view against a tight façade crop always scores low. Weigh the images, not the scores.
- Performance has not been re-measured since `0.1.0`; the 625 kit actors are unmeasured (tracked in `TODO.md` under `0.1.5`).
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