Counting rays #205
Description
Is your feature request related to a problem? Please describe.
Variable roughness with soft shadows and recursions will amp up the ray count dramatically and viewing the number of rays will give insight into how an optimization affects the ray count and how that ray count affects performance. Not only is this good for reflections, this also allows us to see how many rays (total) our program is casting; and which parts we can optimize further.
Describe the solution you'd like
StructuredBuffer counter with InterlockedAdd, to serve as an atomic counter where for every ray you increment. counter[0] is the camera rays (0 for hybrid), counter[1] is the shadow rays, counter[2] is the reflection rays, counter[3] is the AO rays, counter[4] is the GI rays.
This structure can be read from the GPU and can use a shader to render text with the count (to allow triple buffering) or can be read from the CPU and output to the console.
Describe alternatives you've considered
I tried looking into it through nsight, but it doesn't provide any insight into those stats.
Additional context
N.A.