I had a question about implicit primitives. If you define a Sphere
with a radius
, usdGeomImaging
produces a right handed catmull clark subdivision surface containing control points positioned radius
units away from the center of mesh.
Refinement will contract the limit surface away from the specified radius. If someone is using a Sphere as a guide for collisions, this can create discontinuities between the refined imaged surface and the true implicit sphere that might be used in simulation or other contexts.
Should usdGeomImaging
“nudge” the control points away from the center so the refined imaged surface is closer to the radius of specified implicit sphere? Alternatively, could implicit rendering be more easily delegated to renderers native support?
We expect that other primitives like Capsule
, Cone
, and Cylinder
requiring similar treatment.