wehub-resource-sync
52 lines
1.2 KiB
HLSL
52 lines
1.2 KiB
HLSL
#include "shared/hash-functions.hlsl"
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#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 TriggerStep;
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float StepWidth;
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float TurnAngle;
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float StepRatio;
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float TurnRatio;
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float RandomStepWidth;
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float RandomRotateAngle;
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float Seed;
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float2 AreaEdgeRange;
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float2 AreaEdgeCenter;
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float Time; // For Random Seed
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}
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RWStructuredBuffer<LegacyPoint> ResultPoints : 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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if(TriggerStep < 0.5)
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return;
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float2 hash2 = hash22(float2(i.x, Time));
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if(hash2.x > StepRatio)
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return;
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if(hash2.y < TurnRatio) {
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float turnDirection = hash2.y * 100 % 1 > 0.5 ? -1 : 1;
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float4 q = ResultPoints[i.x].Rotation;
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float randomAngle = (TurnAngle + hash2.x * RandomRotateAngle) * 3.141578 / 180 * turnDirection;
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ResultPoints[i.x].Rotation = qMul(q, qFromAngleAxis(randomAngle, float3(0,0,1)));
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}
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float3 forward = float3(StepWidth + RandomStepWidth * hash2.y, 0,0);
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float3 step = qRotateVec3(forward, ResultPoints[i.x].Rotation );
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ResultPoints[i.x].Position += step;
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ResultPoints[i.x].W += 0;
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}
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