public async Task ModifyVertices(SQT.Core.Context context, SQT.Core.Node node, CancellationTokenSource cancellation)
{
if (positionBuffer == null || positionBuffer.count != node.positions.Length)
{
if (positionBuffer != null)
{
positionBuffer.Release();
}
positionBuffer = new ComputeBuffer(node.positions.Length, 3 * 4);
}
if (normalBuffer == null || normalBuffer.count != node.normals.Length)
{
if (normalBuffer != null)
{
normalBuffer.Release();
}
normalBuffer = new ComputeBuffer(node.normals.Length, 3 * 4);
}
positionBuffer.SetData(node.positions);
normalBuffer.SetData(node.normals);
computeShader.SetBuffer(computeKernel, "positionBuffer", positionBuffer);
computeShader.SetBuffer(computeKernel, "normalBuffer", normalBuffer);
computeShader.SetTexture(computeKernel, "_Gradients2D", gradientsTexture);
computeShader.SetTexture(computeKernel, "_Permutation2D", permutationTexture);
computeShader.SetFloat("_Strength", strength);
computeShader.SetFloat("_Frequency", frequency);
computeShader.SetFloat("_Lacunarity", lacunarity);
computeShader.SetFloat("_Persistence", persistence);
computeShader.SetInt("_Octaves", octaves);
uint x, y, z;
computeShader.GetKernelThreadGroupSizes(computeKernel, out x, out y, out z);
float total = x * y * z;
computeShader.Dispatch(computeKernel, Mathf.CeilToInt(node.positions.Length / total), 1, 1);
Task positionsTask = new Task(() => { });
Task normalsTask = new Task(() => { });
Action <AsyncGPUReadbackRequest> positionsAction = new Action <AsyncGPUReadbackRequest>((request) =>
{
node.positions = request.GetData <Vector3>().ToArray();
positionsTask.Start();
});
Action <AsyncGPUReadbackRequest> normalsAction = new Action <AsyncGPUReadbackRequest>((request) =>
{
node.normals = request.GetData <Vector3>().ToArray();
normalsTask.Start();
});
AsyncGPUReadback.Request(positionBuffer, positionsAction);
AsyncGPUReadback.Request(normalBuffer, normalsAction);
await positionsTask;
await normalsTask;
}
public Task ModifyVertices(SQT.Core.Context context, SQT.Core.Node node, CancellationTokenSource cancellation)
{
return(Task.Factory.StartNew(() =>
{
for (int i = 0; i < node.positions.Length; i++)
{
Perlin.PerlinSample sample = GetSample(node.positions[i]);
node.positions[i] += node.normals[i] * sample.value;
node.normals[i] = (node.normals[i] - sample.derivative).normalized;
}
}));
}
public void ModifyMarkedSet(SQT.Core.Context context, HashSet <SQT.Core.Node> marked, SQT.Core.Node leaf)
{
SQT.Core.Node n1 = SQT.Core.Reconciler.EnsureNeighbor(context, leaf, 0);
SQT.Core.Node n2 = SQT.Core.Reconciler.EnsureNeighbor(context, leaf, 1);
SQT.Core.Node n3 = SQT.Core.Reconciler.EnsureNeighbor(context, leaf, 2);
SQT.Core.Node n4 = SQT.Core.Reconciler.EnsureNeighbor(context, leaf, 3);
SQT.Core.Node n5 = SQT.Core.Reconciler.EnsureNeighbor(context, n1, 3);
SQT.Core.Node n6 = SQT.Core.Reconciler.EnsureNeighbor(context, n2, 2);
SQT.Core.Node n7 = SQT.Core.Reconciler.EnsureNeighbor(context, n3, 0);
SQT.Core.Node n8 = SQT.Core.Reconciler.EnsureNeighbor(context, n4, 1);
marked.Add(n1);
marked.Add(n2);
marked.Add(n3);
marked.Add(n4);
marked.Add(n5);
marked.Add(n6);
marked.Add(n7);
marked.Add(n8);
}
