axel: mesh rasterization to sdf. #664
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Summary: For real-time collision detection, signed distance fields are a pretty commonly used primitive, since vertex-signed distance tests are O(1) and volumetric representations tend to be more robust to interpenetration than meshes. This is the actual implementation of the volume with interpolation and gradient calculation; actually creating them will come in later diffs. Reviewed By: jeongseok-meta Differential Revision: D84392738
Summary: We need to be able to create SDF fields from meshes. This is the simplest version of the algorithm: 1. rasterize the triangles to the grid, marking all cells within a narrow band with the actual analytical distance. 2. Solve the eikonal equation to propagate distances throughout the field. 3. Do a simple inside-outside test, this one just shoots rays and counts the intersections. Reviewed By: jeongseok-meta Differential Revision: D84392744
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Summary:
We need to be able to create SDF fields from meshes. This is the simplest version of the algorithm:
Reviewed By: jeongseok-meta
Differential Revision: D84392744