src/BulletMultiThreaded/GpuSoftBodySolvers/OpenCL/OpenCLC10/PrepareLinks.cl

   1 MSTRINGIFY(\r
   2 \r
   3 \r
   4 \r
   5 __kernel void \r
   6 PrepareLinksKernel( \r
   7         const int numLinks,\r
   8         __global int2 * g_linksVertexIndices,\r
   9         __global float * g_linksMassLSC,\r
  10         __global float4 * g_nodesPreviousPosition,\r
  11         __global float * g_linksLengthRatio,\r
  12         __global float4 * g_linksCurrentLength GUID_ARG)\r
  13 {\r
  14         int linkID = get_global_id(0);\r
  15         if( linkID < numLinks )\r
  16         {       \r
  17                 \r
  18                 int2 nodeIndices = g_linksVertexIndices[linkID];\r
  19                 int node0 = nodeIndices.x;\r
  20                 int node1 = nodeIndices.y;\r
  21                 \r
  22                 float4 nodePreviousPosition0 = g_nodesPreviousPosition[node0];\r
  23                 float4 nodePreviousPosition1 = g_nodesPreviousPosition[node1];\r
  24 \r
  25                 float massLSC = g_linksMassLSC[linkID];\r
  26                 \r
  27                 float4 linkCurrentLength = nodePreviousPosition1 - nodePreviousPosition0;\r
  28                 linkCurrentLength.w = 0.f;\r
  29                 \r
  30                 float linkLengthRatio = dot(linkCurrentLength, linkCurrentLength)*massLSC;\r
  31                 linkLengthRatio = 1.0f/linkLengthRatio;\r
  32                 \r
  33                 g_linksCurrentLength[linkID] = linkCurrentLength;\r
  34                 g_linksLengthRatio[linkID]   = linkLengthRatio;         \r
  35         }\r
  36 }\r
  37 \r
  38 );