wehub-resource-sync
82 lines
2.3 KiB
HLSL
82 lines
2.3 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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cbuffer FloatParams : register(b0)
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{
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float3 Target;
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float Amount;
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float3 UpVector;
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}
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cbuffer IntParams : register(b1)
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{
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int UseWAsWeight;
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int Flip;
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int AmountFactor;
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int OrientationMode; // 0 = Look at Center, 2 = screen space, 3 = Billboard to camera
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}
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cbuffer Transforms : register(b2)
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{
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float4x4 CameraToClipSpace;
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float4x4 ClipSpaceToCamera;
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float4x4 WorldToCamera;
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float4x4 CameraToWorld;
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float4x4 WorldToClipSpace;
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float4x4 ClipSpaceToWorld;
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float4x4 ObjectToWorld;
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float4x4 WorldToObject;
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float4x4 ObjectToCamera;
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float4x4 ObjectToClipSpace;
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};
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StructuredBuffer<Point> SourcePoints : t0;
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RWStructuredBuffer<Point> ResultPoints : u0;
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[numthreads(64, 1, 1)] void main(uint3 i : SV_DispatchThreadID)
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{
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uint numStructs, stride;
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SourcePoints.GetDimensions(numStructs, stride);
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if (i.x >= numStructs)
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{
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return;
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}
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Point p = SourcePoints[i.x];
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p.Position = p.Position;
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float strength = Amount * (AmountFactor == 0
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? 1
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: (AmountFactor == 1) ? p.FX1
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: p.FX2);
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float sign = Flip > 0.5 ? -1 : 1;
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switch (OrientationMode) {
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case 0: // Center
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float4 newRot = qLookAt(normalize(Target - p.Position) * sign, normalize(UpVector));
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float3 forward = qRotateVec3(float3(0, 0, 1), newRot);
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float4 alignment = qFromAngleAxis(3.141578, forward);
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newRot = qMul(alignment, newRot);
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p.Rotation = normalize(qSlerp(normalize(p.Rotation), normalize(newRot), strength));
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break;
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case 1: // Screen
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p.Rotation = normalize(qSlerp(p.Rotation,qFromMatrix3((float3x3)WorldToCamera), strength));
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break;
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case 2: // Billboard to camera
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float3 up=mul(float3(0,-1,0),(float3x3)CameraToWorld);
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float3 dir=normalize(p.Position-CameraToWorld[3].xyz);
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p.Rotation = normalize(qSlerp(p.Rotation, qLookAt(-dir,up), strength));
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break;
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}
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ResultPoints[i.x] = p;
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}
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