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docs(resources): Étape 10 textures — bilan, README et ROADMAP à jour

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- ROADMAP : Phase 4.1 (Textures) cochée — struct Texture, uvs, bind group
  shader, Material avec texture diffuse.
- README : jalon 8 (diffuse textures) ajouté à la Roadmap ; ligne resource
  'texture' + material enrichi dans le tableau des resources du module.
- DRAFT Étape 10 : cases 10.1-10.6 cochées (terminé et vérifié le
  2026-09-18), point d'étape clôturé, bilan de fin d'étape rédigé (y compris
  la divergence D2 : multiplication texel * couleur du vertex au lieu de
  remplacement, et la structure réelle du PipelineCache).
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Jérôme Bousquié
2026-09-18 14:26:30 +02:00
parent 440f2dffa3
commit 23568e8820
4 changed files with 74 additions and 31 deletions
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@@ -8,7 +8,8 @@ The `resources` module defines three immutable data types that flow through the
|------|---------------|
| **vertex** | Vertex struct — CPU-side per-attribute tuple (position [f32;3], normal [f32;3], uv [f32;2], color [f32;4]). Must match PipelineCache::build_pipeline() vertex buffer layout byte-for-byte. |
| **mesh** | Mesh struct — persistent GPU geometry container with retained CPU `geometry: Arc<Geometry>` (Étape 8), vertex_buffer (wgpu::Buffer), optional index_buffer, and draw call counters. Created via Mesh::from_geometry() which derives Vertex arrays from the Geometry and uploads them to GPU buffers. |
| **material** | Material struct — lightweight appearance descriptor pairing shader_id with a shared RenderPipeline Arc. Multiple Materials referencing the same shader_id point to the identical compiled GPU pipeline. |
| **material** | Material struct — lightweight appearance descriptor pairing shader_id with a shared RenderPipeline Arc. Multiple Materials referencing the same shader_id point to the identical compiled GPU pipeline. Optionally holds a diffuse `Texture` (Étape 10) plus its texture bind group. |
| **texture** | Texture struct *(Étape 10)* — GPU 2D image (device, view, sampler) in `Rgba8UnormSrgb`. Constructors: `from_rgba8` (raw bytes), `from_bytes` (encoded, via the `image` crate: png/jpeg/...), `from_file`, and `white_placeholder` (1x1 white used when no texture is attached). Sampler is linear-filtered with repeat addressing. |
## Interaction with Other Modules