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Viewing changes to tests/bullet/src/BulletMultiThreaded/GpuSoftBodySolvers/DX11/HLSL/UpdateNodes.hlsl

  • Committer: Package Import Robot
  • Author(s): Sylvestre Ledru
  • Date: 2013-05-02 13:11:51 UTC
  • Revision ID: package-import@ubuntu.com-20130502131151-q8dvteqr1ef2x7xz
Tags: upstream-1.4.1~20130504~adb56cb
Import upstream version 1.4.1~20130504~adb56cb

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tests/bullet/src/BulletMultiThreaded/GpuSoftBodySolvers/DX11/HLSL/UpdateNodes.hlsl
 
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MSTRINGIFY(
 
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cbuffer UpdateVelocitiesFromPositionsWithVelocitiesCB : register( b0 )
 
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{
 
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        int numNodes;
 
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        float isolverdt;
 
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        int padding1;
 
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        int padding2;
 
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};
 
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StructuredBuffer<float4> g_vertexPositions : register( t0 );
 
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StructuredBuffer<float4> g_vertexPreviousPositions : register( t1 );
 
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StructuredBuffer<int> g_vertexClothIndices : register( t2 );
 
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StructuredBuffer<float> g_clothVelocityCorrectionCoefficients : register( t3 );
 
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StructuredBuffer<float> g_clothDampingFactor : register( t4 );
 
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RWStructuredBuffer<float4> g_vertexVelocities : register( u0 );
 
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RWStructuredBuffer<float4> g_vertexForces : register( u1 );
 
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[numthreads(128, 1, 1)]
 
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void 
 
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updateVelocitiesFromPositionsWithVelocitiesKernel( uint3 Gid : SV_GroupID, uint3 DTid : SV_DispatchThreadID, uint3 GTid : SV_GroupThreadID, uint GI : SV_GroupIndex )
 
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{
 
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        int nodeID = DTid.x;
 
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        if( nodeID < numNodes )
 
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        {       
 
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                float3 position = g_vertexPositions[nodeID].xyz;
 
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                float3 previousPosition = g_vertexPreviousPositions[nodeID].xyz;
 
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                float3 velocity = g_vertexVelocities[nodeID].xyz;
 
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                int clothIndex = g_vertexClothIndices[nodeID];
 
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                float velocityCorrectionCoefficient = g_clothVelocityCorrectionCoefficients[clothIndex];
 
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                float dampingFactor = g_clothDampingFactor[clothIndex];
 
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                float velocityCoefficient = (1.f - dampingFactor);
 
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                float3 difference = position - previousPosition;
 
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                velocity += difference*velocityCorrectionCoefficient*isolverdt;
 
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                // Damp the velocity
 
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                velocity *= velocityCoefficient;
 
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                g_vertexVelocities[nodeID] = float4(velocity, 0.f);
 
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                g_vertexForces[nodeID] = float4(0.f, 0.f, 0.f, 0.f);                                                            
 
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        }
 
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}
 
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);
 
 
b'\\ No newline at end of file'