wehub-resource-sync
58 lines
1.4 KiB
HLSL
58 lines
1.4 KiB
HLSL
#include "shared/point.hlsl"
|
|
#include "shared/quat-functions.hlsl"
|
|
|
|
cbuffer Params : register(b0)
|
|
{
|
|
int CycleIndex;
|
|
int TrailLength;
|
|
int PointCount;
|
|
int BufferLength;
|
|
int WriteOrderTo;
|
|
int WriteLineSeparators;
|
|
}
|
|
|
|
StructuredBuffer<Point> CyclePoints : t0; // input
|
|
RWStructuredBuffer<Point> TrailPoints : u0; // output
|
|
|
|
[numthreads(64, 1, 1)] void main(uint3 i : SV_DispatchThreadID)
|
|
{
|
|
if (i.x >= BufferLength)
|
|
return;
|
|
|
|
int sourceIndex = (i.x + CycleIndex) % BufferLength;
|
|
int targetIndex = BufferLength - i.x - 1;
|
|
|
|
TrailPoints[targetIndex] = CyclePoints[sourceIndex];
|
|
|
|
float fInBuffer = 1;
|
|
|
|
int indexInTrail = targetIndex % TrailLength;
|
|
if (WriteLineSeparators)
|
|
{
|
|
fInBuffer = TrailLength > 1 ? (1 - indexInTrail / (float)(TrailLength - 1))
|
|
: 0.5;
|
|
|
|
if (indexInTrail == TrailLength - 1)
|
|
{
|
|
TrailPoints[targetIndex].Scale = NAN;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fInBuffer = TrailLength > 2 ? (1 - (indexInTrail) / (float)(TrailLength - 1))
|
|
: 0.5;
|
|
}
|
|
|
|
if (WriteOrderTo == 1)
|
|
{
|
|
TrailPoints[targetIndex].FX1 = fInBuffer;
|
|
}
|
|
else if (WriteOrderTo == 2)
|
|
{
|
|
TrailPoints[targetIndex].FX2 = fInBuffer;
|
|
}
|
|
else if (WriteOrderTo == 3)
|
|
{
|
|
TrailPoints[targetIndex].Scale = fInBuffer;
|
|
}
|
|
} |