protected override bool ProcessNode(CommandBuffer cmd)
{
if (input == null)
{
return(false);
}
if (input.dimension != TextureDimension.Tex2D)
{
return(false);
}
Color32[] colors = null;
cache = new Texture2D(input.width, input.height, settings.GetGraphicsFormat(graph), TextureCreationFlags.None);
cache.filterMode = FilterMode.Point;
if (input is RenderTexture rt)
{
cmd.RequestAsyncReadback(rt, (r) => {
colors = r.GetData <Color32>().ToArray();
});
cmd.WaitAllAsyncReadbackRequests();
MixtureGraphProcessor.AddGPUAndCPUBarrier(cmd);
}
else
{
colors = (input as Texture2D).GetPixels32();
}
var r = new System.Random(42);
points = new MixtureAttributeList();
for (int i = 0; i < colors.Length; i++)
{
float f = (float)r.NextDouble();
var p = colors[i];
float a = (float)p.a / 255.0f;
if (f * a > density)
{
colors[i] = Color.white;
Vector3 position = new Vector3((float)(i % input.width), 0, (Mathf.Floor(i / (float)input.width)));
Vector2 uv = new Vector2(position.x / (float)input.width, position.z / (float)input.height);
points.Add(new MixtureAttribute {
{ "uv", uv },
{ "position", position },
{ "density", p.a }
});
}
else
{
colors[i] = Color.black;
}
}
cache.SetPixels32(colors);
cache.Apply();
return(true);
}
protected override bool ProcessNode(CommandBuffer cmd)
{
if (!base.ProcessNode(cmd) || input == null)
{
return(false);
}
#if UNITY_2021_2_OR_NEWER
cmd.SetBufferCounterValue(vertices, 0);
#else
cmd.SetComputeBufferCounterValue(vertices, 0);
#endif
// TODO: non pot texture3Ds
cmd.SetComputeVectorParam(computeShader, "_VolumeSize", new Vector4(input.width, input.height, TextureUtils.GetSliceCount(input)));
cmd.SetComputeFloatParam(computeShader, "_VoxelResolution", 1);
cmd.SetComputeFloatParam(computeShader, "_Threshold", threshold);
cmd.SetComputeTextureParam(computeShader, marchingCubes, "_VolumeTexture", input);
cmd.SetComputeBufferParam(computeShader, marchingCubes, "_Vertices", vertices);
cmd.SetComputeBufferParam(computeShader, marchingCubes, "_Normals", normals);
cmd.SetComputeBufferParam(computeShader, marchingCubes, "_Triangles", triangles);
DispatchCompute(cmd, marchingCubes, input.width, input.height, TextureUtils.GetSliceCount(input));
MixtureGraphProcessor.AddGPUAndCPUBarrier(cmd);
ComputeBuffer.CopyCount(vertices, counterReadback, 0);
int[] count = new int[1];
counterReadback.GetData(count);
int vertexCount = count[0] * 3;
// Readback all buffers
Vector3[] vBuffer = new Vector3[vertexCount];
vertices.GetData(vBuffer, 0, 0, vertexCount);
int[] iBuffer = new int[vertexCount];
triangles.GetData(iBuffer, 0, 0, vertexCount);
var mesh = new Mesh {
indexFormat = IndexFormat.UInt32
};
mesh.vertices = vBuffer;
mesh.indexFormat = IndexFormat.UInt32;
// mesh.triangles = iBuffer;
mesh.SetIndices(iBuffer, MeshTopology.Triangles, 0);
mesh.RecalculateBounds();
mesh.RecalculateNormals();
mesh.UploadMeshData(false);
output = new MixtureMesh {
mesh = mesh
};
return(true);
}
protected override bool ProcessNode(CommandBuffer cmd)
{
if (input == null || inputPoints == null)
{
return(false);
}
if (input.dimension != TextureDimension.Tex2D)
{
return(false);
}
Color32[] colors = null;
cache = new Texture2D(rtSettings.GetWidth(graph), rtSettings.GetHeight(graph), rtSettings.GetGraphicsFormat(graph), TextureCreationFlags.None);
cache.filterMode = FilterMode.Point;
if (input is RenderTexture rt)
{
cmd.RequestAsyncReadback(rt, (r) => {
colors = r.GetData <Color32>().ToArray();
});
cmd.WaitAllAsyncReadbackRequests();
MixtureGraphProcessor.AddGPUAndCPUBarrier(cmd);
}
else
{
colors = (input as Texture2D).GetPixels32();
}
var r = new System.Random(42);
outputPoints = new MixtureAttributeList();
Color32[] previewColor = new Color32[cache.width * cache.height];
foreach (var attr in inputPoints)
{
// Sample the input texture with points:
if (attr.TryGetValue("uv", out var ouv) && ouv is Vector2 uv)
{
int index = (int)(uv.x * input.width + uv.y * input.height * input.width);
Vector4 color = new Vector4(colors[index].r / 255f, colors[index].g / 255f, colors[index].b / 255f, colors[index].a / 255f);
AddAttribute(attr, uv, color, ref previewColor);
}
outputPoints.Add(attr);
}
cache.SetPixels32(previewColor);
cache.Apply();
return(true);
}
protected override bool ProcessNode(CommandBuffer cmd)
{
if (loopStart == null)
{
Debug.Log("For End node is not connected to a start");
return(false);
}
if (mode == AggregationMode.FeedbackToStartNode)
{
FeedbackInputToStartNode(cmd);
}
// So right now we need to flush the command buffer because we are changing
// the inputs to some potential CRT nodes in the loop, which result in a change
// of material value and because this change is not registered within the command
// buffer, it would cause issues to just change values without flushing the cmd.
// We need to consider either material property blocks or a material pool in the loop
// for these nodes.
MixtureGraphProcessor.AddGPUAndCPUBarrier(cmd);
return(true);
}
