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Added GPU SoftBody constraint solvers for DirectX 11 (Direct Compute) and OpenCL, thanks to AMD.

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See also http://code.google.com/p/bullet/issues/detail?id=390
Added Demos/DX11ClothDemo
(an OpenCL cloth demo will follow soon)
This commit is contained in:
erwin.coumans
2010-07-20 16:09:53 +00:00
parent 5fd08505ba
commit 11fa2e8b43
99 changed files with 117195 additions and 0 deletions
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36
src/BulletMultiThreaded/GpuSoftBodySolvers/OpenCL/OpenCLC/UpdatePositions.cl Normal file
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@@ -0,0 +1,36 @@
MSTRINGIFY(
//#define float3 float4
__kernel void
updateVelocitiesFromPositionsWithoutVelocitiesKernel(
const int numNodes,
const float isolverdt,
__global float4 * g_vertexPositions,
__global float4 * g_vertexPreviousPositions,
__global int * g_vertexClothIndices,
__global float * g_clothDampingFactor,
__global float4 * g_vertexVelocities,
__global float4 * g_vertexForces)
{
int nodeID = get_global_id(0);
if( nodeID < numNodes )
{
float3 position = g_vertexPositions[nodeID].xyz;
float3 previousPosition = g_vertexPreviousPositions[nodeID].xyz;
float3 velocity = g_vertexVelocities[nodeID].xyz;
int clothIndex = g_vertexClothIndices[nodeID];
float dampingFactor = g_clothDampingFactor[clothIndex];
float velocityCoefficient = (1.f - dampingFactor);
float3 difference = position - previousPosition;
velocity = difference*velocityCoefficient*isolverdt;
g_vertexVelocities[nodeID] = (float4)(velocity, 0.f);
g_vertexForces[nodeID] = (float4)(0.f, 0.f, 0.f, 0.f);
}
}
);