11fa2e8b43
See also http://code.google.com/p/bullet/issues/detail?id=390 Added Demos/DX11ClothDemo (an OpenCL cloth demo will follow soon)
36 lines
1.0 KiB
Common Lisp
36 lines
1.0 KiB
Common Lisp
MSTRINGIFY(
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//#define float3 float4
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__kernel void
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updateVelocitiesFromPositionsWithoutVelocitiesKernel(
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const int numNodes,
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const float isolverdt,
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__global float4 * g_vertexPositions,
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__global float4 * g_vertexPreviousPositions,
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__global int * g_vertexClothIndices,
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__global float * g_clothDampingFactor,
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__global float4 * g_vertexVelocities,
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__global float4 * g_vertexForces)
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{
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int nodeID = get_global_id(0);
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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 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*velocityCoefficient*isolverdt;
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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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); |