wehub-resource-sync
111 lines
2.5 KiB
HLSL
111 lines
2.5 KiB
HLSL
#include "shared/point.hlsl"
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#include "shared/quat-functions.hlsl"
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cbuffer Params : register(b0)
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{
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float AddNewPoints;
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float UseAging;
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float AgingRate;
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float MaxAge;
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float ClampAtMaxAge;
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float Reset;
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float DeltaTime;
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float ApplyMovement;
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float Speed;
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float Drag;
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float SetInitialVelocity;
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float InitialVelocity;
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}
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cbuffer IntParams : register(b1)
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{
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int CollectCycleIndex;
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}
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StructuredBuffer<LegacyPoint> NewPoints : t0;
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RWStructuredBuffer<LegacyPoint> CollectedPoints : u0;
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[numthreads(64,1,1)]
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void main(uint3 i : SV_DispatchThreadID)
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{
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uint newPointCount, pointStride;
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NewPoints.GetDimensions(newPointCount, pointStride);
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uint collectedPointCount, pointStride2;
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CollectedPoints.GetDimensions(collectedPointCount, pointStride2);
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uint gi = i.x;
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if(i.x >= collectedPointCount)
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return;
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if(Reset > 0.5)
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{
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CollectedPoints[gi].W = sqrt(-1);
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return;
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}
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int addIndex = (gi - CollectCycleIndex) % collectedPointCount;
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// Insert emit points
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if( AddNewPoints > 0.5 && addIndex >= 0 && addIndex < (int)newPointCount )
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{
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CollectedPoints[gi] = NewPoints[addIndex];
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if(UseAging > 0.5)
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{
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CollectedPoints[gi].W = 0.0001;
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}
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if(SetInitialVelocity > 0.5)
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{
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CollectedPoints[gi].Rotation = q_encode_v(CollectedPoints[gi].Rotation, InitialVelocity);
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}
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}
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// Update other points
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else if(UseAging > 0.5 || ApplyMovement > 0.5)
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{
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if(UseAging > 0.5 )
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{
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float age = CollectedPoints[gi].W;
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if(!isnan(age))
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{
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if(age <= 0)
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{
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CollectedPoints[gi].W = sqrt(-1); // Flag non-initialized points
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}
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else if(age < MaxAge)
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{
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CollectedPoints[gi].W = age+ DeltaTime * AgingRate;
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}
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else if(ClampAtMaxAge) {
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CollectedPoints[gi].W = MaxAge;
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}
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}
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}
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if(ApplyMovement > 0.5)
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{
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LegacyPoint p = CollectedPoints[gi];
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float4 rot;
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float v = q_separate_v(p.Rotation, rot);
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float3 forward = normalize(qRotateVec3(float3(0, 0, 1), rot));
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forward *= v * 0.01 * Speed;
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p.Position += forward;
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v *= (1-Drag);
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p.Rotation = q_encode_v(rot, v);
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CollectedPoints[gi] = p;
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}
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}
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}
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