ifndef::imagesdir[:imagesdir: ./images]

[[section-glossary]]
== Glossary

[cols="e,2e" options="header"]
|===
| 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.

| 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.

| ODbL
| Open Database Licence 1.0. The licence covering OSM-derived data. Requires attribution and may impose share-alike on derivative databases.

| 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.

| 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.
|===