wehub-resource-sync
57 lines
1.8 KiB
HLSL
57 lines
1.8 KiB
HLSL
#include "shared/hash-functions.hlsl"
|
|
#include "shared/noise-functions.hlsl"
|
|
#include "shared/point.hlsl"
|
|
#include "shared/quat-functions.hlsl"
|
|
|
|
cbuffer Params : register(b0)
|
|
{
|
|
float4x4 TransformVolume;
|
|
|
|
float FallOff;
|
|
float Bias;
|
|
float Strength;
|
|
float DistanceMode;
|
|
|
|
float SpeedFactor;
|
|
}
|
|
|
|
StructuredBuffer<Point> TargetPoints : t0;
|
|
RWStructuredBuffer<Particle> Particles : u0;
|
|
|
|
[numthreads(64, 1, 1)] void main(uint3 i : SV_DispatchThreadID)
|
|
{
|
|
uint gi = i.x;
|
|
uint targetPointCount, maxParticleCount, stride;
|
|
Particles.GetDimensions(maxParticleCount, stride);
|
|
if (gi >= maxParticleCount)
|
|
return;
|
|
|
|
if (isnan(TransformVolume._11) || TransformVolume._11 == 0)
|
|
return;
|
|
|
|
TargetPoints.GetDimensions(targetPointCount, stride);
|
|
uint targetPointIndex = gi % targetPointCount;
|
|
|
|
float3 pos = Particles[gi].Position;
|
|
float4 rot = Particles[gi].Rotation;
|
|
float3 velocity = Particles[gi].Velocity;
|
|
|
|
float3 usedPos = DistanceMode < 0.5 ? pos : TargetPoints[gi].Position;
|
|
float3 posInVolume = mul(float4(usedPos, 1), TransformVolume).xyz;
|
|
float d = length(posInVolume);
|
|
const float r = 0.5;
|
|
float t = (d + r * (FallOff - 1)) / (2 * r * FallOff);
|
|
|
|
// float blendFactor = smoothstep(1, 0, t) * Strength * SpeedFactor;
|
|
|
|
float baseBlend = smoothstep(1, 0, t) * Strength;
|
|
float blendFactor = 1 - pow(1 - baseBlend, SpeedFactor);
|
|
|
|
Particles[gi].Position = lerp(pos, TargetPoints[targetPointIndex].Position, blendFactor);
|
|
Particles[gi].Rotation = qSlerp(rot, TargetPoints[targetPointIndex].Rotation, blendFactor);
|
|
Particles[gi].Velocity = lerp(velocity, 0, blendFactor);
|
|
Particles[gi].Color = lerp(Particles[gi].Color, TargetPoints[targetPointIndex].Color, blendFactor);
|
|
|
|
// Particles[gi].Radius = lerp(Particles[gi].Radius, TargetPoints[targetPointIndex].W, blendFactor);
|
|
}
|