wehub-resource-sync
79 lines
1.9 KiB
HLSL
79 lines
1.9 KiB
HLSL
#include "shared/hash-functions.hlsl"
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#include "shared/noise-functions.hlsl"
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#include "shared/point.hlsl"
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#include "shared/quat-functions.hlsl"
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/*{ADDITIONAL_INCLUDES}*/
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cbuffer Params : register(b0)
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{
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float Amount;
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float Frequency;
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float Phase;
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float Variation;
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float3 AmountDistribution;
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}
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cbuffer Params : register(b1)
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{
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/*{FLOAT_PARAMS}*/
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}
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RWStructuredBuffer<Particle>
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Particles : u0;
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sampler ClampedSampler : register(s0);
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//=== Globals =======================================================
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/*{GLOBALS}*/
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//=== Resources =====================================================
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/*{RESOURCES(t0)}*/
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//=== Field functions ===============================================
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/*{FIELD_FUNCTIONS}*/
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//-------------------------------------------------------------------
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float4 GetField(float4 p)
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{
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float4 f = 1;
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/*{FIELD_CALL}*/
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return f;
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}
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inline float GetDistance(float3 p3)
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{
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return GetField(float4(p3.xyz, 0)).w;
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}
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//===================================================================
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[numthreads(64, 1, 1)] void main(uint3 i : SV_DispatchThreadID)
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{
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uint maxParticleCount, _;
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Particles.GetDimensions(maxParticleCount, _);
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if (i.x >= maxParticleCount)
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{
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return;
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}
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float3 variationOffset = hash41u(i.x).xyz * Variation;
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float3 pos = Particles[i.x].Position * 0.9; // avoid simplex noice glitch at -1,0,0
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float3 noiseLookup = (pos + variationOffset + Phase * float3(1, -1, 0)) * Frequency;
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float3 velocity = Particles[i.x].Velocity;
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float speed = length(velocity);
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float4 field = GetField(float4(pos, 0));
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float fieldAmount = (field.r + field.g + field.b) / 3;
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float amount = Amount / 100 * fieldAmount;
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float3 noise3 = curlNoise(noiseLookup);
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Particle p = Particles[i.x];
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noise3 *= AmountDistribution;
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noise3 = qRotateVec3(noise3, normalize(p.Rotation));
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Particles[i.x].Position += noise3 * amount;
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}
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