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[[section-introduction-and-goals]]
== Introduction and Goals

{project-name} 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

[cols="1,3" options="header"]
|===
| 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-4 | Geographic attribution display (ODbL: "© OpenStreetMap contributors" + licence link)
| 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 link:../../TODO.md[TODO.md]; version direction is in link:../../ROADMAP.md[ROADMAP.md].

=== Quality Goals

[cols="1,3,2" options="header"]
|===
| Priority | Quality Goal | Scenario
| 1 | **Performance efficiency** | 60 FPS at 2560×1440 on RTX 5070 Ti, documented preset, no frame generation
| 2 | **Terrain walkability** | Zero raycast holes across both sidewalks and the carriageway (84-sample transect passes)
| 3 | **Geographic fidelity** | Building placement, street scale, and façade identity match reference photography
| 4 | **Build reproducibility** | Fresh checkout + documented engine path produces a runnable Linux build
| 5 | **Licensing compliance** | Every redistributable asset has verified provenance; ODbL attribution is visible at runtime
|===

=== Stakeholders

[cols="1,2,2" options="header"]
|===
| 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
| OSM contributors | OpenStreetMap | ODbL attribution is displayed and derivative-database obligations are met
|===