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Added support for loading and rendering OBJ meshes.
- Updated asset_packer to parse .obj files into a binary format.
- Added MeshAsset and GetMeshAsset helper to asset_manager.
- Extended Object3D with mesh_asset_id and ObjectType::MESH.
- Implemented mesh rasterization pipeline in Renderer3D.
- Added a sample cube mesh and verified in test_3d_render.
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SUMMARY
=======
Successfully completed comprehensive 4-phase refactor of audio subsystem to
eliminate fragile initialization order dependency between synth and tracker.
This addresses long-standing architectural fragility where tracker required
synth to be initialized first or spectrograms would be cleared.
IMPLEMENTATION
==============
Phase 1: Design & Prototype
- Created AudioEngine class as unified audio subsystem manager
- Created SpectrogramResourceManager for lazy resource loading
- Manages synth, tracker, and resource lifecycle
- Comprehensive test suite (test_audio_engine.cc)
Phase 2: Test Migration
- Migrated all tracker tests to use AudioEngine
- Updated: test_tracker.cc, test_tracker_timing.cc,
test_variable_tempo.cc, test_wav_dump.cc
- Pattern: Replace synth_init() + tracker_init() with engine.init()
- All 20 tests pass (100% pass rate)
Phase 3: Production Integration
- Fixed pre-existing demo crash (procedural texture loading)
- Updated flash_cube_effect.cc and hybrid_3d_effect.cc
- Migrated main.cc to use AudioEngine
- Replaced tracker_update() calls with engine.update()
Phase 4: Cleanup & Documentation
- Removed synth_init() call from audio_init() (backwards compatibility)
- Added AudioEngine usage guide to HOWTO.md
- Added audio initialization protocols to CONTRIBUTING.md
- Binary size verification: <500 bytes overhead (acceptable)
RESULTS
=======
✅ All 20 tests pass (100% pass rate)
✅ Demo runs successfully with audio and visuals
✅ Initialization order fragility eliminated
✅ Binary size impact minimal (<500 bytes)
✅ Clear documentation for future development
✅ No backwards compatibility issues
DOCUMENTATION UPDATES
=====================
- Updated TODO.md: Moved Task #56 to "Recently Completed"
- Updated PROJECT_CONTEXT.md: Added AudioEngine milestone
- Updated HOWTO.md: Added "Audio System" section with usage examples
- Updated CONTRIBUTING.md: Added audio initialization protocols
CODE FORMATTING
===============
Applied clang-format to all source files per project standards.
FILES CREATED
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- src/audio/audio_engine.h (new)
- src/audio/audio_engine.cc (new)
- src/audio/spectrogram_resource_manager.h (new)
- src/audio/spectrogram_resource_manager.cc (new)
- src/tests/test_audio_engine.cc (new)
KEY FILES MODIFIED
==================
- src/main.cc (migrated to AudioEngine)
- src/audio/audio.cc (removed backwards compatibility)
- All tracker test files (migrated to AudioEngine)
- doc/HOWTO.md (added usage guide)
- doc/CONTRIBUTING.md (added protocols)
- TODO.md (marked complete)
- PROJECT_CONTEXT.md (added milestone)
TECHNICAL DETAILS
=================
AudioEngine Design Philosophy:
- Manages initialization order (synth before tracker)
- Owns SpectrogramResourceManager for lazy loading
- Does NOT wrap every synth API - direct calls remain valid
- Provides lifecycle management, not a complete facade
What to Use AudioEngine For:
- Initialization: engine.init() instead of separate init calls
- Updates: engine.update(music_time) instead of tracker_update()
- Cleanup: engine.shutdown() for proper teardown
- Seeking: engine.seek(time) for timeline navigation (debug only)
Direct Synth API Usage (Still Valid):
- synth_register_spectrogram() - Register samples
- synth_trigger_voice() - Trigger playback
- synth_get_output_peak() - Get audio levels
- synth_render() - Low-level rendering
SIZE IMPACT ANALYSIS
====================
Debug build: 6.2MB
Size-optimized build: 5.0MB
Stripped build: 5.0MB
AudioEngine overhead: <500 bytes (0.01% of total)
BACKWARD COMPATIBILITY
======================
No breaking changes. Tests that need low-level control can still call
synth_init() directly. AudioEngine is the recommended pattern for
production code and tests requiring both synth and tracker.
handoff(Claude): Task #56 COMPLETE - All 4 phases finished. Audio
initialization is now robust, well-documented, and properly tested.
The fragile initialization order dependency has been eliminated.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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- Integrated stb_image for image decompression in asset_packer.
- Added GetTextureAsset helper in asset_manager.
- Updated procedural asset generation to include dimensions header for consistency.
- Updated test_assets to verify new asset format.
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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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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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- Task A: Centralized all generated code (assets, timeline) into a single directory to create a single source of truth.
- Task A: Isolated test asset generation into a temporary build directory, preventing pollution of the main source tree.
- Task B: Vertically compacted all C/C++ source files by removing superfluous newlines.
- Task C: Created a top-level README.md with project overview and file descriptions.
- Task D: Moved non-essential documentation into a directory to reduce root-level clutter.
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- Fixed test_sequence by restoring MainSequence::init_test for mocking.
- Corrected CMakeLists.txt dependencies and source groupings to prevent duplicate symbols.
- standardizing Effect constructor signature for seq_compiler compatibility.
- Implemented Hybrid3DEffect using bumpy Renderer3D and procedural NOISE_TEX.
- Updated MainSequence to support depth buffer for 3D elements.
- Formatted all source files with clang-format.
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- Updated asset_packer to parse PROC(...) syntax.
- Implemented runtime dispatch in AssetManager for procedural generation.
- Added procedural generator functions (noise, grid, periodic).
- Added comprehensive tests for procedural asset lifecycle.
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- Refactored asset manager to use a static array for caching, improving performance and memory efficiency.
- Updated asset_packer to correctly generate ASSET_LAST_ID for array sizing.
- Modified asset_manager.h to use a forward declaration for AssetId.
- Updated asset_manager.cc to use the conditional include for generated asset headers.
- Added a test case in test_assets to verify the array-based cache and ASSET_LAST_ID logic.
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- Enabled AllowShortFunctionsOnASingleLine: All
- Enabled AllowShortBlocksOnASingleLine: Always
- Enabled AllowShortIfStatementsOnASingleLine: Always
- Enabled AllowShortLoopsOnASingleLine: true
- Set MaxEmptyLinesToKeep: 1
- Applied formatting to all source files.
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- Updated CMakeLists.txt to generate assets.h and assets_data.cc in src/generated/.
- Updated scripts/gen_assets.sh to reflect the new output location.
- Modified asset_packer.cc to generate correct include paths in assets_data.cc.
- Updated source files (main.cc, asset_manager.cc, test_assets.cc) to include headers from the 'generated/' subdirectory.
- Ensured all targets have correct include paths to find generated headers.
- Removed stale generated files from src/.
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This refactors the asset management system to be more efficient and cleaner.
- Moved common GetAsset/DropAsset logic to src/util/asset_manager.cc.
- Changed retrieval to use an array of records (AssetRecord) for O(1) lookups instead of a switch statement.
- Updated asset_packer to generate only raw data and the record array.
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