Support for BVH primitive lists
Support for BVH primitive lists

If primitive need to be fetched from BVH, linearly search for the right BVH by comparing the primitive range to hr.prim_id
TODO: check if better performance can be achieved by storing bvh_index as part of hit_record_bvh

ukoeln-vis/ctpperf,ukoeln-vis/ctpperf,szellmann/visionaray,tu500/visionaray,szellmann/visionaray,tu500/visionaray