Function vertexIndex [src]

Will make ptr contain the index of the vertex that is being processed by the current vertex shader invocation. ptr must be a reference to variable or struct field.

Prototype

pub fn vertexIndex(comptime ptr: *addrspace(.input) u32) void

Parameters

ptr: *addrspace(.input) u32

Source

  pub fn vertexIndex(comptime ptr: *addrspace(.input) u32) void {
    asm volatile (
        \\OpDecorate %ptr BuiltIn VertexIndex
        :
        : [ptr] "" (ptr),
    );
}  