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MSTRINGIFY(
float dot3(float4 a, float4 b)
{
return a.x*b.x + a.y*b.y + a.z*b.z;
}
__kernel void
PrepareLinksKernel(
const int numLinks,
__global int2 * g_linksVertexIndices,
__global float * g_linksMassLSC,
__global float4 * g_nodesPreviousPosition,
__global float * g_linksLengthRatio,
__global float4 * g_linksCurrentLength GUID_ARG)
{
int linkID = get_global_id(0);
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 = dot3(linkCurrentLength, linkCurrentLength)*massLSC;
linkLengthRatio = 1.0f/linkLengthRatio;
g_linksCurrentLength[linkID] = linkCurrentLength;
g_linksLengthRatio[linkID] = linkLengthRatio;
}
}
);
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