setVisibilityResultMode(_:offset:)
Configures a visibility test for Metal to run, and the destination for any results it generates.
Declaration
func setVisibilityResultMode(_ mode: MTLVisibilityResultMode, offset: Int)Parameters
- mode:
A Mtlvisibilityresultmode that configures which visibility test results the render pass saves to a buffer, or disables visibility testing.
- offset:
A location, in bytes, relative to the start of Visibilityresultbuffer The GPU stores the result of a visibility test at
offset, which needs to be a multiple of8.
Discussion
You use the mode parameter to enable or disable the visibility test, and determine if it produces a boolean response for passing fragments, or if it counts the number of fragments.