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diff --git a/doc/COMPLETED.md b/doc/COMPLETED.md index 072c92f..a3a988c 100644 --- a/doc/COMPLETED.md +++ b/doc/COMPLETED.md @@ -36,6 +36,14 @@ Completed task archive. See `doc/archive/` for detailed historical documents. ## March 2026 +- [x] **CNN v3 shadow pass debugging** — Fixed 5 independent bugs in `gbuf_shadow.wgsl` + `gbuffer_effect.cc`: + 1. **Camera Y-inversion**: `mat4::perspective` negates Y for post-process chain; fixed with `proj.m[5] = -proj.m[5]` in `upload_scene_data` + `WGPUFrontFace_CCW` on raster pipeline. + 2. **Shadow formula**: replaced `shadowWithStoredDistance` (20 steps, bounded) with 64-step IQ soft shadow (`res = min(res, 8.0*d/t)`, unbounded march). + 3. **Local→world SDF scale**: `sdBox/sdSphere` return local-space distance; fixed with `d *= length(obj.model[0].xyz)`. + 4. **Shadow bias**: replaced light-direction bias (fails at terminator) with rasterized surface normal from `normal_mat_tex` (binding 4); `bias_pos = world + nor * 0.05`. + 5. **ShaderComposer**: `GBufViewEffect` needed `ShaderComposer::Get().Compose()` to resolve `#include "debug/debug_print"`. + - Added per-tile labels to `gbuf_view.wgsl` via `debug_str`. Scale propagation for pulsating sphere confirmed correct end-to-end. 36/36 tests. + - [x] **CNN v3 Phase 7: Validation tools** — `GBufViewEffect` (C++ 4×5 channel grid, `cnn_v3/shaders/gbuf_view.wgsl`, `cnn_v3/src/gbuf_view_effect.{h,cc}`): renders all 20 G-buffer feature channels tiled on screen; custom BGL with `WGPUTextureSampleType_Uint`, bind group rebuilt per frame via `wgpuRenderPipelineGetBindGroupLayout`. Web tool "Load sample directory" (`cnn_v3/tools/tester.js` + `shaders.js`): `webkitdirectory` picker, `FULL_PACK_SHADER` compute (matches `gbuf_pack.wgsl`), `runFromFeat()` inference, PSNR vs `target.png`. 36/36 tests. - [x] **CNN v3 Phase 5: Parity validation** — `test_cnn_v3_parity.cc` (2 tests: zero_weights, random_weights). Root cause: intermediate nodes declared at full res instead of W/2, W/4. Fix: `NodeRegistry::default_width()/default_height()` getters + fractional resolution in `declare_nodes()`. Final max_err=4.88e-4 ✓. 36/36 tests. |