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Replace raw shadow (ch18) with dif = max(0,dot(normal,KEY_LIGHT))*shadow
across all layers. Channel count stays 20, weight shapes unchanged.
- gbuf_pack.wgsl: t1.z = pack4x8unorm(mip2.g, mip2.b, dif, transp); t1.w = 0u
- gbuf_deferred.wgsl: read dif from unpack4x8unorm(t1.z).z
- gbuf_view.wgsl: revert to 4×5 grid, ch18=dif label, ch19=trns label
- tools/shaders.js: FULL_PACK_SHADER adds oct_decode + computes dif
- cnn_v3_utils.py: assemble_features() computes dif on-the-fly via oct_decode
- docs: CNN_V3.md, HOWTO.md, HOW_TO_CNN.md, GBUF_DIF_MIGRATION.md updated
handoff(Gemini): shadow→dif migration done, ready for first training pass
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- gbuf_shadow.wgsl: normal bias 0.05→0.02
- gbuf_pack.wgsl: compute dif=diffuse*shadow, drop shadow from t1.z,
store dif in t1.w (INTERMEDIATE — incorrect packing, see migration plan)
- gbuf_deferred.wgsl: read dif from t1.w.x (matches intermediate packing)
- gbuf_view.wgsl: expand to 4×6 grid, show dif.r/g/b in row 5
(INTERMEDIATE — to be reverted to 4×5 with ch18=dif)
- gbuffer_effect.cc: add small hovering sphere (r=0.6) above scene;
swap cube/sphere positions; both spheres pulsate
- docs/GBUF_DIF_MIGRATION.md: full migration plan with checklist
handoff(Claude): intermediate commit — GBUF_DIF_MIGRATION.md §Current State
describes what is wrong and the full implementation checklist (5 steps).
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gbuf_shadow.wgsl — dfWithID():
- Sphere: replace inv_model local-space transform with direct world-space
formula (length(p - center) - radius). Exact, no matrix multiply, no
floating-point error from matrix inversion that can corrupt soft-shadow
penumbra over 64 march steps.
- lp/scale now computed only inside the cases that need them (box/torus/plane)
instead of eagerly for every object.
gbuffer_effect.cc — upload_scene_data():
- Replace per-frame std::vector<GBufObjectData> heap allocation with a
file-static staging buffer s_obj_staging[256]: zero alloc per frame.
handoff(Gemini): sphere SDF now exact; shadow march should be cleaner.
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1. Camera Y-inversion: proj.m[5] = -proj.m[5] in upload_scene_data
+ WGPUFrontFace_CCW on raster pipeline.
2. Shadow formula: replace shadowWithStoredDistance with 64-step
IQ soft shadow (8*d/t, unbounded).
3. Local→world SDF scale: d *= length(obj.model[0].xyz).
4. Shadow bias: use rasterized normal from normal_mat_tex (binding 4)
instead of light direction — fixes terminator self-shadow on spheres.
5. ShaderComposer: GBufViewEffect now resolves #include via
ShaderComposer::Get().Compose().
Also: per-tile channel labels in gbuf_view.wgsl via debug_str.
Scene simplified to 1 cube + 1 sphere for debugging (restore TODO).
Scale propagation for pulsating sphere confirmed correct end-to-end.
handoff(Gemini): shadow validated. Next: restore full scene in
GBufferEffect::set_scene() (20 cubes + 4 spheres, 2 lights), then
run training pass per cnn_v3/docs/HOWTO.md §3.
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- TODO/PROJECT_CONTEXT updated to reflect operational pipeline state
- GBufDeferredEffect: shadow re-enabled (albedo * (ambient + diffuse * shadow))
feat_tex1 binding restored for shadow channel debugging
handoff(Gemini): shadow pass live again — investigate why shadow looks broken.
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- Missing WGPUFrontFace_CW (Y-flipped perspective) caused back faces to
render instead of front faces → cubes appeared inside-out.
- Sphere objects now use ray-sphere impostor in fs_main: correct silhouette,
smooth normal from hit point, and reprojected clip-space depth.
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Raw WGSL was sent to WebGPU without resolving the math/normal include.
Also removed unused feat_tex1 binding (shadow dropped for now).
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inv_model applies the inverse rotation → normals pointing inward.
model matrix is correct for uniform-scale objects (matches rotating_cube.wgsl).
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New src/shaders/math/normal.wgsl: oct_encode, oct_decode, oct_encode_unorm,
oct_decode_unorm. Registered in InitShaderComposer as "math/normal".
Removed inline copies from gbuf_raster.wgsl and gbuf_pack.wgsl.
18/18 tests passing.
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New effect unpacks feat_tex0/feat_tex1 and outputs albedo * shadow.
Replaces CNNv3Effect in cnn_v3_test sequence until training is complete.
37/37 tests passing.
handoff(Gemini): GBufDeferredEffect wired in timeline; CNN v3 pipeline: GBufferEffect → GBufDeferredEffect → sink.
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- GBufferEffect::render() was a no-op (scene_ready_=false) because
set_scene() was never called from the timeline sequence constructor.
Fixed by calling set_scene() at the end of the constructor.
- Camera now orbits the scene at 0.3 rad/s (R=6, y=2.5).
handoff(Gemini): cnn_v3_test sequence now renders G-buffer + GBufViewEffect with animated orbiting camera.
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Remove dead code and reduce duplication:
- drop create_bilinear_sampler() (never called)
- drop update_pack_bind_group() stub and pack_bind_group_ member
- drop node_feat0_/node_feat1_; use output_nodes_[0/1] directly
- Compose({}, src) consistently for all three pipelines
- extract clear_r8_node() helper to replace two identical 10-line blocks
No behavior change. 36/36 tests pass.
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dfWithID() in gbuf_shadow.wgsl now branches on obj.params.x
(ObjectType) instead of using sdBox for everything:
0=CUBE → sdBox(lp, vec3(1))
1=SPHERE → sdSphere(lp, 1.0)
2=PLANE → sdPlane(lp, vec3(0,1,0), obj.params.y)
3=TORUS → sdTorus(lp, vec2(0.8, 0.2))
36/36 tests pass.
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Implements gbuf_shadow.wgsl: fullscreen render pass that reads depth
from Pass 1, reconstructs world-space positions, evaluates a proxy-box
SDF for each object (via inv_model), computes soft shadows for both
directional lights using shadowWithStoredDistance(), and writes shadow
factor to the RGBA8Unorm node_shadow_ target consumed by gbuf_pack.wgsl.
Bind layout: B0=GlobalUniforms, B1=ObjectsBuffer (storage-read),
B2=texture_depth_2d, B3=GBufLightsUniforms.
Sky fragments (depth=1.0) are output as 1.0 (fully lit).
Falls back to clear(1.0) if pipeline is not ready.
36/36 tests pass.
handoff(Gemini): Pass 2 done. Pass 3 (transparency) still TODO.
Phase 4 (type-aware SDF) optional after visual validation.
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GBufferEffect:
- set_scene() now owns Scene/Camera internally; no external pointers needed
- 20 randomly rotating cubes (xorshift32 seed, axis-angle animation)
- 4 pumping spheres (radius = base_r * (1 + audio_intensity * 0.8))
- Camera at (0,2.5,6) looking at origin; aspect updated per-frame
- GBufLightsUniforms: 2 directional lights (warm key + cool fill)
- object_type written to ObjectData.params.x (ready for SDF shadow)
- shadow/transp nodes cleared via zero-draw render passes (placeholder)
- bilinear sampler cached via create_linear_sampler() / sampler_.get()
- dead placeholder textures removed
GBufViewEffect:
- gbuf_view.wgsl: all channels now fully grayscale (removed color tint)
- seq_compiler.py: GBufViewEffect added to CLASS_TO_HEADER
- timeline.seq: cnn_v3_test uses GBufViewEffect -> sink for debug view
Docs: HOWTO.md §1 updated with set_scene() description + §1b implementation
plan for Pass 2 SDF shadow (shader spec, bind layout, C++ additions)
handoff(Gemini): GBufferEffect has internal scene, 36/36 tests green.
Next: implement Pass 2 shadow (gbuf_shadow.wgsl) per §1b plan in HOWTO.md.
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measure)
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WebGPU auto-reflects the BGL from the shader; a declared-but-unused sampler
binding is omitted from the layout, causing CreateBindGroup to reject it.
Removed binding 6 (sampler) entirely — all reads use textureLoad(). Renumbered
f0/f1 from 7/8 to 6/7 to match.
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C++ GBufViewEffect: renders all 20 feature channels from feat_tex0/feat_tex1
in a 4×5 tiled grid. Custom BGL with WGPUTextureSampleType_Uint; bind group
rebuilt per frame via wgpuRenderPipelineGetBindGroupLayout.
Web tool: "Load sample directory" button — webkitdirectory picker, FULL_PACK_SHADER
compute (matches gbuf_pack.wgsl packing), runFromFeat() skips photo-pack step,
computePSNR() readback + comparison vs target.png side-by-side.
36/36 tests pass. Docs updated: HOWTO.md §9, README, PROJECT_CONTEXT, TODO,
COMPLETED.
handoff(Gemini): CNN v3 Phase 7 done. Next: run train_cnn_v3.py (see HOWTO §3).
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- Bind document.getElementById in filmParams() to fix 'Illegal invocation' error
- Add preload() that auto-fetches cnn_v3_weights.bin + cnn_v3_film_mlp.bin from
workspaces/main/weights/ on init; skips silently if files not found
- Add '↺ Reload from workspace weights/' button for manual re-fetch
handoff(Gemini): cnn_v3 web tool fixed; serve from repo root via http.server
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- seq_compiler: add gbuf_albedo/gbuf_rgba32uint to NODE_TYPES
- timeline: declare gbuf_feat0/feat1 as gbuf_rgba32uint, route
CNNv3Effect output through cnn_v3_out (gbuf_albedo) + Passthrough
to sink (dec0 can't write directly to Rgba8Unorm sink)
- cnn_v3_effect: fix update_bind_groups using .set() instead of
.replace() causing FATAL assert on second frame
- TODO: add CNN v3 "2D mode" (G-buffer-free) future task
handoff(Gemini): CNNv3Effect now runs without crashes at --seek 48
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- CNNv3Effect constructor loads ASSET_WEIGHTS_CNN_V3 via GetAsset on startup
- seq_compiler.py: CLASS_TO_HEADER supports full #include paths for cnn_v3/ classes
- timeline.seq: add cnn_v3_test sequence at 48s (GBufferEffect → CNNv3Effect)
- test_cnn_v3_parity: zero_weights test now explicitly uploads zeros to override asset
handoff(Gemini): CNNv3Effect ready; export weights to workspaces/main/weights/ and seek to 48s to test
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- Add WEIGHTS_CNN_V3 and WEIGHTS_CNN_V3_FILM_MLP to workspaces/main/assets.txt
- Add opencv-python and pillow to export_cnn_v3_weights.py uv inline deps
- Update HOW_TO_CNN.md §3 export target → workspaces/main/weights/
- Update HOW_TO_CNN.md §4 weight loading → SafeGetAsset (asset system)
handoff(Gemini): cnn_v3 weight assets registered; export and C++ load path documented
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https://colorifyai.art/photo-to-sketch/#playground with 'Ink Sketch' does a small zooming
and resize
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- --patch-search-window N: at dataset init, find per-patch (dx,dy) in
[-N,N]² that minimises grayscale MSE between source albedo and target;
result cached so __getitem__ pays only a list-lookup per sample.
- --resume [CKPT]: restore model + Adam state from a checkpoint; omit
path to auto-select the latest in --checkpoint-dir.
- Ctrl-C (SIGINT) finishes the current batch, then saves a checkpoint
before exiting; finally-block guarded so no spurious epoch-0 save.
- Review: remove unused sd variable, lift patch_idx out of duplicate
computation, move _LUMA to Constants block, update module docstring.
handoff(Gemini): cnn_v3/training updated — no C++ or test changes.
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handoff(Gemini): train_cnn_v3.py now has uv script metadata block
(torch, torchvision, numpy, pillow, opencv-python). HOW_TO_CNN §2
Prerequisites updated with uv quick-start alternative.
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handoff(Gemini): CNNv3Dataset now loads all samples once in __init__ into
self._cache; __getitem__ reads from cache instead of reloading PNGs each
call. Eliminates N×patches_per_image file loads per epoch.
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target.png can have a different resolution than albedo.png in simple
samples; patch slicing into the smaller target produced 0×0 tensors,
crashing torch.stack in the DataLoader collate.
handoff(Gemini): target resized in _load_sample (LANCZOS) + note in HOW_TO_CNN §1c.
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handoff(Gemini): added render + batch-pack example commands at end of section 1b
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blender_export.py:
- Replace broken compositor FileOutput approach with native OPEN_EXR_MULTILAYER
render output; all enabled passes included automatically, no socket wiring needed
- Suppress Fra:/Mem: render spam via os.dup2 fd redirect; per-frame progress
printed to stderr via render_post handler
pack_blender_sample.py:
- get_pass_r: try .R/.X/.Y/.Z/'' suffixes + aliases param for Depth→Z fallback
- combined_rgba loaded once via ("Combined","Image") loop; shared by transp+target
- Remove unused sys import
HOW_TO_CNN.md: update channel table to native EXR naming (Depth.Z, IndexOB.X,
Shadow.X), fix example command, note Shadow defaults to 255 when absent
handoff(Gemini): blender pipeline now produces correct multilayer EXR with all
G-buffer passes; pack script handles native channel naming
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- Use bpy.app.version for version detection instead of attribute sniffing
- Blender 5.0.x: warn that per-pass compositor routing is broken (Combined only);
compositing_node_group path kept ready for when Blender fixes this upstream
- Remove all DEBUG prints and failed use_nodes=True experiment
- configure_scene() returns only discard_dir (compositor always configured)
- Move _SOCKET_ALIASES to module level; simplify slots/None fallback
handoff(Gemini): blender_export.py stable for Blender 4.5 LTS; Blender 5.x
path is forward-compatible but produces Combined-only output until upstream fix.
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RenderLayer sockets
- Activate compositor in Blender 5.0+ by relying on compositing_node_group
assignment (no use_nodes needed, avoids deprecation warning)
- Document full CompositorNodeRLayers output socket list for Blender 5.0.1
- Clean up SOCKET_ALIASES to match confirmed socket names
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after render
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- Prefer file_output_items over file_slots; use explicit is-None checks
so empty collections do not fall through to the legacy attribute.
- Clear out_node.file_name so multilayer EXR frames are named 0001.exr
instead of file_name0001.exr.
handoff(Gemini): blender_export.py now produces frames/0001.exr on Blender 5.0.1.
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