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Add `Blend2d` (Alpha, PremultipliedAlpha, Additive, Multiply, Screen, Opaque) selectable per object via `Object2d::set_blend` / `SceneNode2d::set_blend[_recursive]`. `ObjectMaterial2d` now builds one surface pipeline per blend mode, each lazily specialized by MSAA sample count, and selects it from `data.blend()` at draw time. Wireframe/point overlays keep straight alpha blending. Adds the `blend_modes2d` example plus its run configs. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add `SceneNode2d::sprite`/`add_sprite` (textured quad), `SpriteSheet` (regular atlas grid) with `set_sprite_frame` for flip-book animation, `set_uv_rect` to map a sprite to a texture sub-rectangle (recomputed from each vertex's normalized position so it is repeatable), and `nine_slice`/`add_nine_slice` building a 16-vertex / 9-quad mesh with a `Border` that keeps corners fixed while edges and center stretch. Adds the `sprites2d` example plus its run configs. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The 2D scene renders into the HDR film, so HDR tonemapping and bloom (`Window::set_bloom_enabled`) already affect 2D content — over-bright (>1.0) colors bleed light. Add `Window::render_2d_with` to run a post-processing effect over a 2D frame, and a new `Crt` stylization effect (barrel curvature, chromatic aberration, scanlines, vignette) with per-term toggles. The CRT shader is GPU-validated in the shader-validity test. Adds the `post_processing2d` example plus its run configs. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add `LitMaterial2d`, shading 2D objects with the dynamic 2D lights from a new thread-local `Light2dManager` (ambient + up to 16 point/spot `Light2d`s, stored in a uniform array so it stays within WebGPU's bind group/storage limits). Lights sit above the plane, so a normal-mapped sprite shades per-pixel (diffuse + Blinn-Phong specular); without a normal map the surface is flat and still picks up each light's radial falloff and spot cone. New `ObjectData2d` fields `normal_map` and `lit_params` (+ accessors, `Object2d`/`SceneNode2d` setters). Helpers: `SceneNode2d::lit_sprite` /`add_lit_sprite`, `set_lit_params`, `set_normal_map_from_file`. The lit shader (point + spot lights) is GPU-validated in the shader-validity test. Adds the `lighting2d` example + run configs. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add `Tilemap`: a grid of tiles drawn from a single `SpriteSheet` atlas, baked into one `SceneNode2d` mesh (one draw call, sharing the standard 2D material and blend modes). Tiles index atlas frames; `set_tile` / `fill` rebuild the dynamic mesh, and `EMPTY` cells are skipped. GPU-validated in the shader-validity test (including a dynamic rebuild). Adds the `tilemap2d` example + run configs. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add `SkinnedMesh2d`: vertices bind to up to four bones of a `Bone2d` skeleton with weights, and the vertex shader blends per-bone joint matrices (bone world × inverse bind, as 2D affine 3x3) on the GPU — Spine/DragonBones-style deformation. `update()` walks the hierarchy and uploads the joint matrices; `set_bone_local`/`set_transform` pose it. Exposes a `SceneNode2d` rendered by a dedicated skinning material. GPU-validated in the shader-validity test (built + posed + rendered). Adds the `skinning2d` example + run configs. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Apply WESL @if conditional compilation to object2d.wgsl: a `textured` feature gates the texture binding and sample. `ObjectMaterial2d` now compiles specialized shader variants and pipelines lazily, cached by (blend mode, features, sample count), all sharing one pipeline layout (stripped bindings simply go unused). Specialization is automatic: an object still using the global default white texture gets the untextured variant (no texture sample, higher occupancy), while textured objects get the textured one — no API change. Both variants are GPU-validated in the shader-validity test (a textured object added alongside the solid ones). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add `Gi2d`, a post-processing effect that ray-marches incoming light per pixel against analytic emitter/occluder discs and modulates the rendered scene by the resulting irradiance — soft shadows and colored light bleed with no light/shadow bookkeeping. Applied via `render_2d_with`; set the camera and the emitters/occluders each frame. This is the direct, brute-force form of the technique that radiance cascades accelerate (cone-traced cascade probes can layer on top later); implemented straight here for correctness and clarity. The march uses analytic sphere tracing, so no precomputed SDF/JFA texture is needed for the disc primitives. GPU-validated in the shader-validity test. Adds the `global_illumination2d` example + run configs. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Generalize post-processing from a single effect to an ordered chain, the three.js EffectComposer model: the tonemapped scene feeds the first effect, each effect's output feeds the next, and the last writes the frame. Implemented by ping-ponging between two LDR targets (`post_process_render_target` + a new `_b`); each effect reads one and writes the other. `Window::render_chain` / `render_2d_with_chain` / `render_3d_with_chain` (and `OffscreenSurface::render_chain`) take `&mut [&mut dyn PostProcessingEffect]`. The single-effect `render` / `render_2d_with` are now thin wrappers (back-compatible), and an empty chain matches the no-effect path. GPU-validated: the shader-validity test now also renders a 2-effect chain. Adds the `effect_chain2d` example (GI → CRT) + run configs. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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We have made a couple of PRs for improving 3D rendering effects. This PR focuses on 2D (see changelog for details).
This also removes the default behavior that closes the window when pressing the Escape button (it can be re-enabled with
Window::rebind_close_key(Some(Key::Escape))if needed).