| Age | Commit message (Collapse) | Author |
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Fixed critical bug causing mesh and bounding box stretching during rotation.
ROOT CAUSE:
quat::from_axis() did not normalize the input axis vector. When called
with non-unit vectors (e.g., {0.5, 1.0, 0.0}), it created invalid
quaternions that encoded scaling transformations instead of pure rotations.
SYMPTOMS:
- Mesh vertices stretched during rotation (non-uniform scaling)
- Bounding boxes deformed and stretched
- Transform matrices became non-orthogonal
ISSUE LOCATIONS:
- src/tests/test_mesh.cc:309 - axis {0.5, 1.0, 0.0} (length ≈1.118)
- src/gpu/effects/flash_cube_effect.cc:79 - axis {0.3, 1, 0.2} (length ≈1.044)
FIX:
Added automatic normalization in quat::from_axis():
a = a.normalize(); // Ensure axis is unit vector
RESULT:
- All quaternions now represent pure rotations
- No scaling artifacts during rotation
- Bounding boxes remain orthogonal
- Fixes Task A (test_mesh stretching bug)
SAFETY:
This change is backward compatible. Code that already passed normalized
axes will work identically (normalizing a unit vector = identity).
handoff(Claude): Rotation stretching bug fixed. Both shader normal
transformation (previous commit) and quaternion creation (this commit)
now work correctly. test_mesh should display properly rotated meshes
without distortion.
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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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- 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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- 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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- 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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- Extended mini_math.h with mat4 multiplication and affine transforms.
- Implemented TextureManager for runtime procedural texture generation and GPU upload.
- Added 3D system components: Camera, Object, Scene, and Renderer3D.
- Created test_3d_render mini-demo for interactive 3D verification.
- Fixed WebGPU validation errors regarding depthSlice and unimplemented WaitAny.
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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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