WaveActiveSum function
Sums up the value of the expression across all active lanes in the current wave and replicates it to all lanes in the current wave.
Syntax
<type> WaveActiveSum(
<type> expr
);
Parameters
-
expr
-
The expression to evaluate.
Return value
The sum value.
Remarks
The order of operations is undefined.
This function is supported from shader model 6.0 in all shader stages.
Examples
float3 total = WaveActiveSum( position ); // sum positions in wave
float3 center = total/count; // compute average of these positions
See also