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Add RayMarchResult struct and functions for deferred SDF rendering:
- rayMarchWithID() tracks object ID and distance_max
- reconstructPosition(), normalWithID(), shadowWithStoredDistance()
- Pass 1: store geometry data, Pass 2: reuse for shading
Add WGSL style rule: prefer return values over pointers for small structs (≤16 bytes).
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Add unified camera system for SDF raymarching effects:
- CameraParams struct (80 bytes): inv_view matrix + FOV/near/far/aspect
- SDFEffect base class: manages camera uniform, provides update_camera() helpers
- camera_common.wgsl: getCameraRay(), position/forward/up/right extractors
- SDFTestEffect: working example with orbiting camera + animated sphere
Refactor effect headers:
- Extract class definitions from demo_effects.h to individual .h files
- Update includes in .cc files to use specific headers
- Cleaner compilation dependencies, faster incremental builds
Documentation:
- Add SDF_EFFECT_GUIDE.md with complete workflow
- Update ARCHITECTURE.md, UNIFORM_BUFFER_GUIDELINES.md
- Update EFFECT_WORKFLOW.md, CONTRIBUTING.md
Tests: 34/34 passing, SDFTestEffect validated
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Merge sdf_primitives.wgsl into math/sdf_shapes.wgsl to eliminate
duplication and establish single source of truth for all SDF functions.
Changes:
- Delete common/shaders/sdf_primitives.wgsl (duplicate of math/sdf_shapes.wgsl)
- Add sdBox2D() and sdEllipse() to math/sdf_shapes.wgsl
- Update ellipse.wgsl (main/test) to use #include "math/sdf_shapes"
- Update scene1.wgsl to use math/sdf_shapes instead of sdf_primitives
- Rename asset SHADER_SDF_PRIMITIVES → SHADER_SDF_SHAPES
- Update shader registration and tests
Impact:
- ~60 lines eliminated from ellipse shaders
- Single source for 3D primitives (sphere, box, torus, plane) and 2D (box, ellipse)
- Consistent include path across codebase
All tests passing (34/34).
handoff(Claude): SDF shapes consolidated to math/sdf_shapes.wgsl
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Extracted common WGSL functions into separate files in `common/shaders/` to improve reusability and maintainability.
- Created `common/shaders/render/fullscreen_vs.wgsl` for a reusable fullscreen vertex shader.
- Created `common/shaders/math/color.wgsl` for color conversion and tone mapping functions.
- Created `common/shaders/math/utils.wgsl` for general math utilities.
- Created `common/shaders/render/raymarching.wgsl` for SDF raymarching logic.
- Updated multiple shaders to use these new common snippets via `#include`.
- Fixed the shader asset validation test to correctly handle shaders that include the common vertex shader.
This refactoring makes the shader code more modular and easier to manage.
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Eliminates 36 duplicate shader files across workspaces.
Structure:
- common/shaders/{math,render,compute}/ - Shared utilities (20 files)
- workspaces/*/shaders/ - Workspace-specific only
Changes:
- Created common/shaders/ with math, render, compute subdirectories
- Moved 20 common shaders from workspaces to common/
- Removed duplicates from test workspace
- Updated assets.txt: ../../common/shaders/ references
- Enhanced asset_packer.cc: filesystem path normalization for ../ resolution
Implementation: Option 1 from SHADER_REUSE_INVESTIGATION.md
- Single source of truth for common code
- Workspace references via relative paths
- Path normalization in asset packer
handoff(Claude): Common shader directory implemented
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