demo.git/src/shaders/render, branch main

factorize render_ntsc()

2026-03-11T06:13:22Z

ntsc: factor common code into snippet; add RGB and YIQ input variants

2026-03-10T19:42:32Z

- Extract shared NTSC logic into render/ntsc_common.wgsl snippet - sample_ntsc_signal() hook decouples input format from processing - ntsc_rgb.wgsl: RGB input (converts via rgba_to_luma_chroma_phase) - ntsc_yiq.wgsl: YIQ passthrough for RotatingCube output - Add NtscYiq WgslEffect thin wrapper; register both in tests handoff(Claude): NTSC refactor complete; NtscYiq ready for timeline use with RotatingCube. Co-Authored-By: Claude Sonnet 4.6

ntsc effect for real

2026-03-08T22:38:11Z

fix(shaders): enforce y-up screen-space convention + document coordinate conventions

2026-03-08T08:13:57Z

- Add textureSampleYUp() helper to fullscreen_uv_vs.wgsl to correct y-flip when sampling WebGPU textures with y-up UV coordinates - Use textureSampleYUp() in passthrough, gaussian_blur, combined_postprocess - Fix skybox.wgsl: remove erroneous (1.0 - uv.y) flip (double-flip bug) - Document world/view/screen conventions in doc/3D.md, camera_common.wgsl, and fullscreen_uv_vs.wgsl Co-Authored-By: Claude Sonnet 4.6

feat(effects): add Scratch post-process effect with reusable scratch_lines snippet

2026-03-06T21:53:29Z

- src/shaders/render/scratch_lines.wgsl: reusable WGSL snippet registered as "render/scratch_lines"; call scratch_lines(uv, resolution, time)->f32 from any effect. Uses hash_1f from math/noise; 8 lines/frame, ~24fps flicker. - src/effects/scratch.{wgsl,h,cc}: thin Scratch effect wrapping the snippet. - Applied to "intro" and "rotating_cube" sequences as the final step. - 35/35 tests passing. handoff(Gemini): Scratch effect added. render/scratch_lines snippet is reusable. Co-Authored-By: Claude Sonnet 4.6

refactor: move common/shaders/ to src/shaders/

2026-02-28T08:08:57Z

Relocates shared WGSL shaders under src/ where all source code lives, eliminating the top-level common/ directory. - Update asset references in workspaces/main/assets.txt and workspaces/test/assets.txt - Update docs: PROJECT_CONTEXT.md, ARCHITECTURE.md, WORKSPACE_SYSTEM.md, SHADER_REUSE_INVESTIGATION.md Co-Authored-By: Claude Sonnet 4.6