//Get wind vector at a single position
public Vector3 GetWind(Vector3 position)
{
//create and set result buffer
if (wind != null)
{
wind.Release();
}
wind = new ComputeBuffer(1, sizeof(float) * 3);
getWindCompute.SetBuffer(getWindKernelSinglePos, "Wind", wind);
//set other variables
getWindCompute.SetTexture(getWindKernelSinglePos, "windFieldStatic", windField.GetStaticWindField());
getWindCompute.SetTexture(getWindKernelSinglePos, "windFieldDynamic", windField.GetDynamicWindField());
getWindCompute.SetTexture(getWindKernelSinglePos, "windFieldNoise", windField.GetNoiseWindField());
Vector3 globalWind = windField.GetGlobalWind();
getWindCompute.SetFloats("globalWind", new float[3] {
globalWind.x, globalWind.y, globalWind.z
});
getWindCompute.SetFloat("windFieldCellSize", windField.GetCellSize());
Vector3 leastCorner = windField.LeastCorner;
getWindCompute.SetFloats("windFieldStart", new float[3] {
leastCorner.x, leastCorner.y, leastCorner.z
});
getWindCompute.SetFloats("samplePosition", new float[3] {
position.x, position.y, position.z
});
//dispatch shader
getWindCompute.Dispatch(getWindKernelSinglePos, 1, 1, 1);
//need to send buffer data to an array in order to return a Vector3
Vector3[] windArr = new Vector3[1];
wind.GetData(windArr);
return(windArr[0]);
}
private void UpdateWindFieldBuffer()
{
Vector3Int windFieldNumCells = windField.GetNumCells();
if (windField1DBuffer != null)
{
windField1DBuffer.Release();
}
windField1DBuffer = new ComputeBuffer(windFieldNumCells.x * windFieldNumCells.y * windFieldNumCells.z, bufferStride);
windFieldTo1DCompute.SetBuffer(kernel, "Result", windField1DBuffer);
windFieldTo1DCompute.SetTexture(kernel, "windFieldStatic", windField.GetStaticWindField());
windFieldTo1DCompute.SetTexture(kernel, "windFieldDynamic", windField.GetDynamicWindField());
windFieldTo1DCompute.SetTexture(kernel, "windFieldNoise", windField.GetNoiseWindField());
Vector3 globalWind = windField.GetGlobalWind();
windFieldTo1DCompute.SetFloats("globalWind", new float[3] {
globalWind.x, globalWind.y, globalWind.z
});
windFieldTo1DCompute.SetInt("numCellsX", windFieldNumCells.x);
windFieldTo1DCompute.SetInt("numCellsY", windFieldNumCells.y);
windFieldTo1DCompute.SetFloat("cellSize", windField.GetCellSize());
Vector3 leastCorner = windField.LeastCorner;
windFieldTo1DCompute.SetFloats("leastCorner", new float[3] {
leastCorner.x, leastCorner.y, leastCorner.z
});
/*
* int[] numGroups = new int[3]
* {
* Mathf.Max(1, Mathf.CeilToInt(windFieldNumCells.x / (float)groupSizes[0])),
* Mathf.Max(1, Mathf.CeilToInt(windFieldNumCells.y / (float)groupSizes[1])),
* Mathf.Max(1, Mathf.CeilToInt(windFieldNumCells.z / (float)groupSizes[2]))
* };
*/
int numGroupsX = Mathf.Max(1, Mathf.CeilToInt((windFieldNumCells.x * windFieldNumCells.y * windFieldNumCells.z) / 64));
//windFieldTo1DCompute.Dispatch(kernel, numGroups[0], numGroups[1], numGroups[2]);
windFieldTo1DCompute.Dispatch(kernel, numGroupsX, 1, 1);
}