Description
SubgroupLocalInvocationId
-
Decorating a variable with the
SubgroupLocalInvocationId
builtin decoration will make that variable contain the index of the invocation within the subgroup. This variable is in range [0,SubgroupSize
-1].
Note
There is no direct relationship between index = If full subgroups are not enabled, some subgroups may be dispatched with inactive invocations that do not correspond to a local workgroup invocation, making the value of index unreliable. |
Document Notes
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.