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path: root/src/effects/scratch_effect.h
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2026-03-07refactor(effects): introduce WgslEffect for shader-only post-process effectsskal
Replace boilerplate .h/.cc pairs for simple single-pass effects with a generic WgslEffect base class that takes a shader string + optional WgslEffectParams (binding 3). Port Flash, Passthrough, Heptagon, Scratch, and GaussianBlur to thin header-only wrappers — no .cc files, no CMake entries needed. Removes 5 .cc files (-243 lines). Update EFFECT_WORKFLOW.md, CONTRIBUTING.md, and AI_RULES.md to document the WgslEffect (Path A) vs full class (Path B) workflow. Doc cleanup: fix stale GaussianBlurParams/PostProcessEffect references and test counts. handoff(Claude): WgslEffect landed; 5 effects ported; docs updated. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-06feat(effects): add Scratch post-process effect with reusable scratch_lines ↵skal
snippet - 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 <noreply@anthropic.com>