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Brecht Van Lommel 04857cc8ef Cycles: fully decouple triangle and curve primitive storage from BVH2

Previously the storage here was optimized to avoid indirections in BVH2
traversal. This helps improve performance a bit, but makes performance
and memory usage of Embree and OptiX BVHs a bit worse also. It also adds
code complexity in other parts of the code.

Now decouple triangle and curve primitive storage from BVH2.
* Reduced peak memory usage on all devices
* Bit better performance for OptiX and Embree
* Bit worse performance for CUDA
* Simplified code:
** Intersection.prim/object now matches ShaderData.prim/object
** No more offset manipulation for mesh displacement before a BVH is built
** Remove primitive packing code and flags for Embree and OptiX
** Curve segments are now stored in a KernelCurve struct
* Also happens to fix a bug in baking with incorrect prim/object

Fixes T91968, T91770, T91902

Differential Revision: https://developer.blender.org/D12766

2021-10-06 17:52:04 +02:00

cpu

Cleanup: remove unused device code and includes

2021-09-24 16:34:14 +02:00

cuda

Cycles: refactor API for GPU display

2021-09-30 20:48:08 +02:00

dummy

Fix T91641: crash rendering with 16k environment map in Cycles

2021-09-23 17:48:16 +02:00

hip

Cleanup: spelling in comments