public AsyncGPUReadbackRequest Initialize()
{
_kernelInit = CS.FindKernel("Init");
_kernelStepVelocity = CS.FindKernel("StepV");
_kernelStepPosition = CS.FindKernel("StepP");
var vertexCount = _vertexCountPerDim;
var totalVertex = vertexCount * vertexCount;
var L0 = _clothSize / (vertexCount - 1);
CS.SetInts("size", vertexCount, vertexCount, totalVertex);
CS.SetVector("restLengths", new Vector3(L0, L0 * Mathf.Sqrt(2), L0 * 2));
this.UpdateSimulateSetting();
_positionBuffer = new ComputeBuffer(totalVertex, 16);
_velocitiesBuffer = new ComputeBuffer(totalVertex, 16);
_normalBuffer = new ComputeBuffer(totalVertex, 16);
System.Action <int> setBufferForKernet = (k) => {
CS.SetBuffer(k, "velocities", _velocitiesBuffer);
CS.SetBuffer(k, "positions", _positionBuffer);
CS.SetBuffer(k, "normals", _normalBuffer);
};
setBufferForKernet(_kernelInit);
setBufferForKernet(_kernelStepVelocity);
setBufferForKernet(_kernelStepPosition);
CS.Dispatch(_kernelInit, _groupX, _groupY, 1);
_totalVertexCount = totalVertex;
CreateIndexBuffer();
material.SetBuffer(ShaderIDs.position, _positionBuffer);
material.SetBuffer(ShaderIDs.normals, _normalBuffer);
return(AsyncGPUReadback.Request(_positionBuffer, (req) => {
if (req.hasError)
{
Debug.LogError("Init error");
}
if (req.done && !req.hasError)
{
_initialized = true;
}
}));
}
public IEnumerator StartAsync()
{
yield return(Initialize());
float dt = 0;
float minDt = _simulateSetting.stepTime;
while (true)
{
dt += Time.deltaTime;
while (dt > minDt)
{
CS.SetFloat("deltaTime", minDt);
CS.Dispatch(_kernelStepVelocity, _groupX, _groupY, 1);
CS.Dispatch(_kernelStepPosition, _groupX, _groupY, 1);
dt -= minDt;
}
yield return(null);
AsyncGPUReadback.WaitAllRequests();
}
}
