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- Implemented a two-pass rendering strategy in Renderer3D::render:
- First pass renders the skybox without depth writes.
- Second pass renders scene objects with proper depth testing.
- Ensured skybox pipeline explicitly ignores depth via .
- Corrected struct in C++ and WGSL for and padding, resolving validation errors.
- Reverted to for SDF misses, preventing sky bleed-through.
- Updated to include a SKYBOX object with Perlin noise.
handoff(Gemini): Resolved rendering bugs. Skybox renders correctly as background, and scene objects (including floor) are now visible. Codebase stable.
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- Added ObjectType::SKYBOX for dedicated skybox rendering.
- Created assets/final/shaders/skybox.wgsl for background rendering.
- Implemented a two-pass rendering strategy in Renderer3D::render:
- First pass renders the skybox without depth writes.
- Second pass renders scene objects with depth testing.
- Corrected GlobalUniforms struct in common_uniforms.wgsl and src/3d/renderer.h to include and explicit padding for 112-byte alignment.
- Updated Renderer3D::update_uniforms to set the new and zero-initialize padding.
- Reverted sky sampling logic in renderer_3d.wgsl to for SDF misses, preventing background bleed-through.
- Updated test_3d_render.cc to include a SKYBOX object with Perlin noise.
handoff(Gemini): The skybox is now correctly rendered with Perlin noise as a dedicated background pass. Objects render correctly without transparency to the sky. All necessary C++ and WGSL shader changes are implemented and verified.
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- Updated ProcGenFunc signature to return bool for error reporting.
- Implemented gen_perlin (Fractional Brownian Motion) in procedural/generator.cc.
- Added support for sky texture in Renderer3D and its shader.
- Integrated Perlin noise sky texture in test_3d_render.cc.
- Caught and handled memory/generation errors in AssetManager and TextureManager.
- Assigned reference numbers to all remaining tasks in documentation.
handoff(Gemini): Side-quest complete. ProcGenFunc now returns bool. Perlin noise added and used for sky in 3D test. Windows build remains stable. All tasks numbered.
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- Consolidated all WebGPU shims and platform-specific logic into src/platform.h.
- Refactored platform_init to return PlatformState by value and platform_poll to automatically refresh time and aspect_ratio.
- Removed STL dependencies (std::map, std::vector, std::string) from AssetManager and Procedural subsystems.
- Fixed Windows cross-compilation by adjusting include paths and linker flags in CMakeLists.txt and updating build_win.sh.
- Removed redundant direct inclusions of GLFW/glfw3.h and WebGPU headers across the project.
- Applied clang-format and updated documentation.
handoff(Gemini): Completed Task #20 and 20.1. Platform abstraction is now unified, and core paths are STL-free. Windows build is stable.
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Critical Bug Fixes:
- Fixed pool exhaustion: Tracker slots never freed after use, music stopped
after 8 patterns. Implemented round-robin allocation with cleanup.
- Fixed note name parsing: Added automatic note-to-frequency conversion
in tracker_compiler. Bass and melody now play correctly.
- Fixed timing mismatch: Patterns are 2 seconds but triggered every 4 seconds,
causing silence gaps. Updated SCORE to trigger every 2 seconds.
Improvements:
- Implemented dynamic resource sizing in tracker_compiler: Analyzes score to
determine optimal MAX_VOICES/MAX_SPECTROGRAMS values.
- Created comprehensive rock track: 11 patterns with drums, bass, power chords,
and lead melody over 25 seconds.
- Added 213 lines of asset system documentation with 8 prioritized tasks.
Known Issues for next session:
- Audio quality could be improved (some artifacts remain)
- Note synthesis uses default parameters, needs tuning
- Pattern overlaps might cause voice exhaustion under heavy load
Files Changed:
- src/audio/tracker.cc: Round-robin pool allocation, cleanup logic
- tools/tracker_compiler.cc: Note name parser, resource usage analysis
- src/audio/synth.h: Increased limits to 16 based on analysis
- assets/music.track: 230-line rock arrangement
- doc/ASSET_SYSTEM.md: Comprehensive documentation + 8 tasks
- TODO.md: Updated with recent completions and known issues
handoff(Gemini): Music system now functional but needs quality improvements.
Audio artifacts and synthesis tuning remain. See TODO.md for details.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Implemented comprehensive unit tests for ShaderComposer and a validation test for production WGSL shader assets. This ensures the shader asset pipeline is robust and that all shaders contain required entry points and snippets. Also improved InitShaderComposer to be more robust during testing.
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Completed the first part of Task #25. Created static libraries for each subsystem (audio, gpu, 3d, util, procedural) and refactored all executables to link against them. This improves modularity and simplifies the build process. Also fixed linker errors related to glfw, wgpu, and miniaudio.
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Replaces the global array with which wraps a local static array. This ensures the asset table is initialized on first use, preventing crashes when other globals (like shader strings) try to access assets during dynamic initialization.
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Fixes crashes in demo64k and test_3d_render caused by uninitialized ShaderComposer. Moves InitShaderComposer() call before effect initialization in gpu.cc and adds explicit call in test_3d_render.cc. Also fixes include paths for generated assets.h in multiple files.
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Extracted all hardcoded WGSL shaders into external assets. Updated AssetManager to handle shader snippets. Refactored Renderer3D, VisualDebug, and Effects to load shaders via the AssetManager, enabling better shader management and composition.
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Updates asset_packer to align static asset arrays to 16 bytes and append a null-terminator. This allows assets to be safely reinterpreted as typed pointers (e.g., float*, const char*) without copying. Updates AssetManager documentation to reflect these guarantees.
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- Implemented the basic tracker system with runtime support (tracker.h, tracker.cc).
- Added a sample music track file (assets/music.track).
- Created a tracker compiler tool (tools/tracker_compiler.cc) to generate music data.
- Updated CMakeLists.txt to build the tracker compiler and integrate generated data.
- Updated GEMINI.md to reflect new file locations and project context.
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- Implemented test_shader_composer.cc to verify WGSL snippet assembly.
- Expanded test_maths.cc with rigorous matrix inversion and transposition checks.
- Verified that A * inv(A) equals Identity for various TRS combinations.
- Updated CMakeLists.txt to include the new test targets.
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- Reverted floor to BOX (SDF) for robust shadow receipt.
- Updated shader to apply grid pattern ONLY to instance 0 (floor) or PLANE objects.
- Restored noise-based texturing for floating cubes and other SDF primitives.
- Verified that shadows and textures are now correctly applied across all scene elements.
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- Switched floor back to PLANE type in test_3d_render.
- Updated fragment shader to apply grid pattern ONLY to PLANE objects.
- Restored noise-based bump mapping and texturing for BOX and other SDF primitives.
- Verified correct visual appearance of floating cubes (no fixed grid).
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- Implemented ShaderComposer for modular WGSL snippet management.
- Factored out common math, primitives, lighting, and ray-box helpers.
- Refactored Renderer3D to use dynamic shader composition.
- Consolidated high-DPI and shadow robustness fixes into final shader structure.
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- Increased number of random objects to 30.
- Enlarged base scale of all objects.
- Restricted object distribution radius to encourage inter-object shadows.
- Scaled up center torus and moving sphere.
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- Corrected world-space position calculation in SDF fragment shader.
- Transformed local hit point back to world space using the model matrix.
- Restored accurate planar p.xz mapping for the floor grid.
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- Added Ray-Box intersection in local space to derive precise t_entry and t_exit.
- Optimized fragment shader to only march between box intersection points.
- Improved robustness of SDF rendering for non-uniform scaled objects.
- Verified correct texturing and shadow casting on all primitives.
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- Adjusted Torus proxy hull in vs_main to 1.5x0.5x1.5 for better SDF fit.
- Updated VisualDebug::add_box to use per-object local extents.
- Standardized floor grid mapping in fs_main using planar p.xz projection.
- Verified non-uniform scale and rotation robustness in test_3d_render.
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- Implemented planar (p.xz) grid mapping for BOX objects in the SDF path.
- Standardized grid generation logic between raster and SDF paths for consistency.
- Ensured grid is high-contrast and clearly visible on the floor.
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- Adjusted Torus proxy hull in vs_main to fit unit dimensions (1.4x0.4x1.4).
- Updated VisualDebug to support per-object local extents, improving wireframe accuracy.
- Restored procedural floor grid and SDF bump mapping in the fragment shader.
- Added varied scaling to test scene objects to verify transform robustness.
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- Updated VisualDebug to accept mat4 transforms, enabling wireframes to follow rotating objects.
- Restored SDF bump mapping and floor grid texture in the fragment shader.
- Added vec4::xyz() helper to mini_math.h.
- Fixed Renderer3D to pass the full model matrix for debug visualization.
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- Updated ObjectData to include inv_model for reliable world-to-local mapping.
- Enabled SDF raymarching path for all objects in test_3d_render (floor is now a large SDF BOX).
- Implemented robust normal calculation using SDF gradient for all objects.
- Standardized lighting (light_dir = 1,1,1) and diffuse+ambient model.
- Refined calc_shadow with instance-based skip_idx and robust bias.
- Fixed non-uniform scale handling in shader by extracting min scale from model matrix.
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- Converted floor in test_3d_render to a large SDF BOX for consistent shading.
- Standardized lighting (light_dir = 1,1,1) and normal calculation for all objects.
- Fixed calc_shadow bias and skip_idx to reliably prevent self-shadowing.
- Improved raymarching robustness in fs_main to find exact SDF hit points.
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- Elevated objects in test_3d_render to avoid shadow occlusion.
- Slanted light direction for more visible, elongated shadows.
- Sharpened shadows by increasing k constant to 32.
- Cleaned up debug printfs from previous turns.
- Maintained skip_idx logic for robust self-shadowing prevention.
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- Reverted floor to CUBE (rasterized) at index 0.
- Restored vertical lighting and original soft shadow loop (k=8, t+=h).
- Maintained instance-based skip_idx for generic self-shadowing prevention.
- Confirmed map_scene correctly skips the floor, allowing other objects to cast shadows on it.
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- Switched floor from rasterized CUBE to SDF PLANE for consistent shadow mapping.
- Implemented skip_idx in map_scene to properly prevent self-shadowing.
- Standardized soft shadow logic with improved bias and step size.
- Increased object elevation and adjusted light direction for more visible shadows.
- Enabled debug boxes in test_3d_render.
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- Implemented dynamic resolution support in all shaders and effects.
- Added explicit viewport setting for all render passes to ensure correct scaling.
- Fixed 3D shadow mapping by adding PLANE support and standardizing soft shadow logic.
- Propagated resize events through the Effect hierarchy.
- Applied project-wide code formatting.
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- Reverted test_3d_render to use the global 'noise' texture for floating objects, restoring their bump mapping.
- Implemented a procedural grid directly in the fragment shader for rasterized objects (floor).
- Inverted the grid color scheme (black lines on a lighter background) as requested.
- This ensures accurate object bump mapping and clear shadow visibility on the floor without requiring multiple texture bindings.
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- Replaced invalid 'i++' with 'i = i + 1' in the shader's calc_shadow function loop.
- This resolves the shader parsing error and allows the 3D renderer test to run successfully on all platforms.
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- Modified 'test_3d_render' to generate and use a procedural 'grid' texture for the floor.
- Updated fragment shader to sample the texture for rasterized objects, adding a grid pattern to the floor.
- This provides visual detail and contrast, making raymarched shadows much easier to observe and verify.
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- Removed duplicate 'light_dir' declaration in the shader.
- Fixed a syntax error (duplicate closing raw string delimiter) that caused shader compilation failure.
- Verified all targets build and run correctly with 'check_all.sh'.
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- Fixed 'redefinition of light_dir' shader validation error by centralizing the light definition at the top of fs_main.
- Further brightened the floor in 'test_3d_render' for better shadow contrast.
- Reduced shadow bias and made the light more vertical to ensure shadows are clearly visible on all surfaces.
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- Part 1: Unified shadow calculation in fragment shader for both SDF and rasterized objects.
- Part 2: Added 'model_inverse_transpose' to ObjectData to correctly transform normals for non-uniformly scaled objects.
- Part 3: Brightened the floor in 'test_3d_render' to make shadows visible.
- Verified correct lighting and shadows on the non-uniformly scaled floor.
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- Implemented full support for non-uniform scaling by calculating and passing the 'model_inverse_transpose' matrix to the shader for correct normal transformation.
- Added 'transpose()' and 'inverse()' methods to the 'mat4' class in 'mini_math.h'.
- Refactored the shader to use the new matrix for lighting rasterized objects.
- Updated the test scene to use a rasterized floor (CUBE) instead of an SDF one, ensuring it receives correct lighting and shadows even with non-uniform scale.
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- Refactored the fragment shader to calculate raymarched shadows for all fragments, not just SDF objects.
- This enables rasterized objects (like the floor) to receive shadows from SDF objects, fixing the missing shadows in the test scene.
- This serves as a proof-of-concept for a unified lighting pipeline.
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- Changed the floor object in 'test_3d_render' from SDF BOX to rasterized CUBE.
- This prevents the non-uniform scale of the floor from breaking the scene-wide SDF query used for shadow calculations.
- The lighting and shadows now render correctly in the more complex test scene.
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- Updated 'src/tests/test_3d_render.cc' to populate the scene with a large floor and 30 randomly placed objects (spheres, boxes, tori).
- This provides a more complex environment to verify the new shadow mapping implementation.
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- Updated Renderer3D shader to include 'map_scene' and 'calc_shadow' functions.
- Shader now iterates over all objects (up to kMaxObjects) to evaluate the scene SDF globally.
- Implemented hard/soft shadows from a fixed directional light.
- Updated GlobalUniforms struct with proper packing/padding for WebGPU compatibility.
- Captured 'GPU BVH & Shadows' task in PROJECT_CONTEXT.md for future optimization.
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- Added 'src/3d/visual_debug.h/cc' to implement wireframe rendering.
- Integrated VisualDebug into Renderer3D with a static global toggle.
- Added '--debug' command-line option to 'demo64k' and 'test_3d_render' to enable wireframes.
- Updated 'src/gpu/effects/hybrid_3d_effect.h' to expose the debug setter (reverted later as static method used).
- Ensured full cross-platform compatibility (native and Windows) for the new debug module.
- All code guarded by STRIP_ALL for final release.
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