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examples: apply real texture assets to multi-mesh examples

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- meshes/cube: procedural checkerboard -> uv_texture.jpg (8x8 UV grid)
- meshes/pbr: floor -> ground.jpeg, bump cube -> cave.jpg + caveNormal.jpg
  (normal map pre-encoded via sRGB OETF to cancel the GPU sRGB decode)
- lights/shadow: ground -> ground.jpeg, cube -> uv_texture.jpg
- effects/demo: ground -> ground.jpeg, cube -> uv_texture.jpg
- effects/fog: ground -> ground.jpeg (tiled 80x80), cubes -> stonewall.jpg
- effects/dof: ground -> ground.jpeg, cubes -> uv_texture.jpg
- cameras/culling: shared cube mesh -> uv_texture.jpg
- add lib/examples/assets/textures/ (19 assets, 6.5 MB)
- document assets + usage in examples READMEs, docs/user/examples.md,
  docs/user/meshes/materials.md (CARGO_MANIFEST_DIR pattern, sRGB caveat)
This commit is contained in:
Jérôme Bousquié
2026-09-26 10:49:13 +02:00
parent fecfdcd2d2
commit e5f3636b42
32 changed files with 341 additions and 104 deletions
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lib/examples/cameras/README.md
+6 -4
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@@ -4,7 +4,7 @@ Examples where the **camera** drives what gets rendered.
| Example | Run command | What it shows |
|---------|-------------|---------------|
| `culling` | `cargo run -p wsg-lib --example culling` | GPU-driven frustum culling: a 15×15 grid of cubes, off-frustum objects skipped |
| `culling` | `cargo run -p wsg-lib --example culling` | GPU-driven frustum culling: a 15×15 grid of UV-atlas cubes, off-frustum objects skipped |
> All commands run from the repo root.
@@ -16,9 +16,11 @@ objects changes — with **zero CPU cost** (the GPU decides in a compute pass).
## `culling` — GPU Frustum Culling
A grid of **15×15 = 225 cubes** is placed on a large floor. The GPU-driven
culling (compute shader) determines which cubes are visible in the camera
frustum and zeros their indirect draw args — **zero CPU cost**.
A grid of **15×15 = 225 cubes** is placed on a large floor. The shared cube
mesh is textured with the `uv_texture.jpg` atlas — the colourful labelled
cells make it obvious exactly which cubes the GPU draws and which it culls.
The GPU-driven culling (compute shader) determines which cubes are visible in
the camera frustum and zeros their indirect draw args — **zero CPU cost**.
```sh
cargo run -p wsg-lib --example culling