demo.git - Vide-coded 64k demo system

Age	Commit message (Collapse)	Author
18 hours	fix: Resolve WebGPU uniform buffer alignment issues (Task #74)	skal
	Fixed critical validation errors caused by WGSL vec3<f32> alignment mismatches. Root cause: - WGSL vec3<f32> has 16-byte alignment (not 12 bytes) - Using vec3 for padding created unpredictable struct layouts - C++ struct size != WGSL struct size → validation errors Solution: - Changed circle_mask_compute.wgsl EffectParams padding - Replaced _pad: vec3<f32> with three separate f32 fields - Now both C++ and WGSL calculate 16 bytes consistently Results: - demo64k: 0 WebGPU validation errors - Test suite: 32/33 passing (97%) - All shader compilation tests passing Files modified: - assets/final/shaders/circle_mask_compute.wgsl - TODO.md (updated task status) - PROJECT_CONTEXT.md (updated test results) - HANDOFF_2026-02-09_UniformAlignment.md (technical writeup) Note: DemoEffectsTest failure is unrelated (wgpu_native library bug) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
33 hours	feat(gpu): Add VignetteEffect	skal
	- Implemented VignetteEffect, including its shader, parameters, and sequence integration. - Added VignetteEffect to demo_effects.h, shaders.cc/h, and asset definitions. - Updated seq_compiler to handle VignetteEffect parameters. - Added VignetteEffect to test suite and updated expected counts. - Ensured all changes build and tests pass.