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watrabi
2025-09-18 17:55:52 -04:00
commit 977f1ff4b8
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App.BulletPhysics/BulletMultiThreaded/GpuSoftBodySolvers/DX11/HLSL/PrepareLinks.hlsl
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MSTRINGIFY(
cbuffer PrepareLinksCB : register( b0 )
{
int numLinks;
int padding0;
int padding1;
int padding2;
};
// Node indices for each link
StructuredBuffer<int2> g_linksVertexIndices : register( t0 );
StructuredBuffer<float> g_linksMassLSC : register( t1 );
StructuredBuffer<float4> g_nodesPreviousPosition : register( t2 );
RWStructuredBuffer<float> g_linksLengthRatio : register( u0 );
RWStructuredBuffer<float4> g_linksCurrentLength : register( u1 );
[numthreads(128, 1, 1)]
void
PrepareLinksKernel( uint3 Gid : SV_GroupID, uint3 DTid : SV_DispatchThreadID, uint3 GTid : SV_GroupThreadID, uint GI : SV_GroupIndex )
{
int linkID = DTid.x;
if( linkID < numLinks )
{
int2 nodeIndices = g_linksVertexIndices[linkID];
int node0 = nodeIndices.x;
int node1 = nodeIndices.y;
float4 nodePreviousPosition0 = g_nodesPreviousPosition[node0];
float4 nodePreviousPosition1 = g_nodesPreviousPosition[node1];
float massLSC = g_linksMassLSC[linkID];
float4 linkCurrentLength = nodePreviousPosition1 - nodePreviousPosition0;
float linkLengthRatio = dot(linkCurrentLength, linkCurrentLength)*massLSC;
linkLengthRatio = 1./linkLengthRatio;
g_linksCurrentLength[linkID] = linkCurrentLength;
g_linksLengthRatio[linkID] = linkLengthRatio;
}
}
);