Differentiable Surface Interaction #209
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- Add Shape::ray_intersect_preliminary - Add Scene::ray_intersect_preliminary - Rename Shape::fill_surface_interaction into Shape::compute_surface_interaction - Add support for differential SurfaceInteraction3f - Add unit tests for differentiable SI - Remove Shape::normal_derivative()
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Description
In this PR, I propose some API changes, mainly in
scene.handshape.hto add more flexibility and finer control on how theSurfaceInteraction3fis computed after ray intersection.This is the first part of a larger work itemon integrating the
pathreparamplugin from PR #157.Testing
TODO
Checklist:
gpu_*andpacket_*variants. If you can't test this, please leave a note in the description above