public override DensityData GenerateDensityGridGpu(Vector3Int gridSize, Vector3 boxSize, Vector3 rendererPos)
{
var densityData = new DensityData(gridSize);
var size = gridSize.x * gridSize.y * gridSize.z;
var tgX = Mathf.CeilToInt(gridSize.x / (float)ThreadGroupSize);
var tgY = Mathf.CeilToInt(gridSize.y / (float)ThreadGroupSize);
var tgZ = Mathf.CeilToInt(gridSize.z / (float)ThreadGroupSize);
var buffer = new ComputeBuffer(size, sizeof(float));
buffer.SetData(densityData.Data);
computeShader.SetBuffer(0, "points", buffer);
computeShader.SetFloat("radius", radius);
computeShader.SetInt("sizeX", gridSize.x);
computeShader.SetInt("sizeY", gridSize.y);
computeShader.SetInt("sizeZ", gridSize.z);
computeShader.SetVector("size", boxSize);
computeShader.SetVector("position", rendererPos);
computeShader.SetVector("sphereCenter", transform.position);
computeShader.Dispatch(0, tgX, tgY, tgZ);
buffer.GetData(densityData.Data);
buffer.Release();
return(densityData);
}
public override DensityData GenerateDensityGridGpu(Vector3Int gridSize, Vector3 boxSize, Vector3 rendererPos)
{
var densityData = new DensityData(gridSize);
var size = gridSize.x * gridSize.y * gridSize.z;
var threadsGroupsX = Mathf.CeilToInt(gridSize.x / (float)ThreadGroupSize);
var threadGroupsY = Mathf.CeilToInt(gridSize.y / (float)ThreadGroupSize);
var threadGroupsZ = Mathf.CeilToInt(gridSize.z / (float)ThreadGroupSize);
var buffer = new ComputeBuffer(size, sizeof(float));
buffer.SetData(densityData.Data);
computeShader.SetBuffer(0, "points", buffer);
// Standard variables
computeShader.SetInt("sizeX", gridSize.x);
computeShader.SetInt("sizeY", gridSize.y);
computeShader.SetInt("sizeZ", gridSize.z);
computeShader.SetVector("size", boxSize);
computeShader.SetVector("position", rendererPos);
// Specific variables
var offsets = CreateOffsets();
var offsetsBuffer = new ComputeBuffer(offsets.Length, sizeof(float) * 3);
offsetsBuffer.SetData(offsets);
computeShader.SetBuffer(0, "offsets", offsetsBuffer);
computeShader.SetInt("octaves", octaves);
computeShader.SetFloat("noiseScale", noiseScale);
computeShader.SetFloat("noiseWeight", noiseWeight);
computeShader.SetFloat("persistence", persistence);
computeShader.SetFloat("weightMultiplier", weightMultiplier);
computeShader.SetFloat("lacunarity", lacunarity);
// Launch kernels
computeShader.Dispatch(0, threadsGroupsX, threadGroupsY, threadGroupsZ);
// Get results
buffer.GetData(densityData.Data);
buffer.Release();
offsetsBuffer.Release();
return(densityData);
}
public DensityData GenerateDensityGridCpu(Vector3Int gridSize, Vector3 boxSize, Vector3 rendererPos)
{
var densityGrid = new DensityData(gridSize);
for (var xi = 0; xi < gridSize.x; xi++)
{
for (var yi = 0; yi < gridSize.y; yi++)
{
for (var zi = 0; zi < gridSize.z; zi++)
{
var posInGrid = new Vector3(
(xi / (gridSize.x - 1f)) * boxSize.x,
(yi / (gridSize.y - 1f)) * boxSize.y,
(zi / (gridSize.z - 1f)) * boxSize.z
);
var densityPosition = rendererPos + posInGrid - (boxSize / 2f);
var density = Get(densityPosition);
densityGrid[xi, yi, zi] = density;
}
}
}
return(densityGrid);
}
private (List <Vector3>, Dictionary <Vector3Int, int>) GetVertices(DensityData densityData)
{
_verticesBuffer.Clear();
_verticesIndicesBuffer.Clear();
for (var xi = 0; xi < gridSize.x - 1; xi++)
{
for (var yi = 0; yi < gridSize.y - 1; yi++)
{
for (var zi = 0; zi < gridSize.z - 1; zi++)
{
var vertexPos = Vector3.zero;
var counter = 0;
// Search sign changes
for (var dx = 0; dx <= 1; dx++)
{
for (var dy = 0; dy <= 1; dy++)
{
if ((densityData[xi + dx, yi + dy, zi + 0] > 0f) !=
(densityData[xi + dx, yi + dy, zi + 1] > 0f))
{
var change = new Vector3(
dx,
dy,
Adapt(densityData[xi + dx, yi + dy, zi + 0],
densityData[xi + dx, yi + dy, zi + 1])
);
change = Vector3.Scale(change, UnitVector);
vertexPos += change;
counter++;
}
}
}
for (var dx = 0; dx <= 1; dx++)
{
for (var dz = 0; dz <= 1; dz++)
{
if ((densityData[xi + dx, yi + 0, zi + dz] > 0f) !=
(densityData[xi + dx, yi + 1, zi + dz] > 0f))
{
var change = new Vector3(
dx,
Adapt(densityData[xi + dx, yi + 0, zi + dz],
densityData[xi + dx, yi + 1, zi + dz]),
dz
);
change = Vector3.Scale(change, UnitVector);
vertexPos += change;
counter++;
}
}
}
for (var dy = 0; dy <= 1; dy++)
{
for (var dz = 0; dz <= 1; dz++)
{
if ((densityData[xi + 0, yi + dy, zi + dz] > 0f) !=
(densityData[xi + 1, yi + dy, zi + dz] > 0f))
{
var change =
new Vector3(
Adapt(densityData[xi + 0, yi + dy, zi + dz],
densityData[xi + 1, yi + dy, zi + dz]),
dy,
dz
);
change = Vector3.Scale(change, UnitVector);
vertexPos += change;
counter++;
}
}
}
if (counter != 0)
{
vertexPos /= (float)counter;
_verticesIndicesBuffer.Add(new Vector3Int(xi, yi, zi), _verticesBuffer.Count);
_verticesBuffer.Add(vertexPos + GetDensityPosition(xi, yi, zi));
}
}
}
}
return(_verticesBuffer, _verticesIndicesBuffer);
}
private List <int> GetTriangles(IEnumerable <Vector3> vertices, Dictionary <Vector3Int, int> indexes, DensityData densityData)
{
_trianglesBuffer.Clear();
for (var xi = 0; xi < gridSize.x - 1; xi++)
{
for (var yi = 0; yi < gridSize.y - 1; yi++)
{
for (var zi = 0; zi < gridSize.z - 1; zi++)
{
if (xi > 0 && yi > 0)
{
//var solid1 = density.Get(position + GetDensityPosition(xi, yi, zi + 0)) > 0f;
//var solid2 = density.Get(position + GetDensityPosition(xi, yi, zi + 1)) > 0f;
var solid1 = densityData[xi, yi, zi + 0] > 0f;
var solid2 = densityData[xi, yi, zi + 1] > 0f;
if (solid1 != solid2)
{
if (solid1)
{
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi - 1, zi)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi - 0, zi)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi - 1, zi)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi - 0, zi)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi - 0, zi)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi - 1, zi)]);
}
else
{
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi - 1, zi)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi - 0, zi)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi - 1, zi)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi - 0, zi)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi - 1, zi)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi - 0, zi)]);
}
}
}
if (xi > 0 && zi > 0)
{
//var solid1 = density.Get(position + GetDensityPosition(xi, yi + 0, zi)) > 0f;
//var solid2 = density.Get(position + GetDensityPosition(xi, yi + 1, zi)) > 0f;
var solid1 = densityData[xi, yi + 0, zi] > 0f;
var solid2 = densityData[xi, yi + 1, zi] > 0f;
if (solid1 != solid2)
{
if (solid1)
{
//t1
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi, zi - 1)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi, zi - 0)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi, zi - 1)]);
//t2
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi, zi - 1)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi, zi - 0)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi, zi - 0)]);
}
else
{
//t1
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi, zi - 1)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi, zi - 0)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi, zi - 1)]);
//t2
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi, zi - 0)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 0, yi, zi - 0)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi - 1, yi, zi - 1)]);
}
}
}
if (yi > 0 && zi > 0)
{
//var solid1 = density.Get(position + GetDensityPosition(xi + 0, yi, zi)) > 0f;
//var solid2 = density.Get(position + GetDensityPosition(xi + 1, yi, zi)) > 0f;
var solid1 = densityData[xi + 0, yi, zi] > 0f;
var solid2 = densityData[xi + 1, yi, zi] > 0f;
if (solid1 != solid2)
{
if (solid2)
{
//t1
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 0, zi - 1)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 0, zi - 0)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 1, zi - 1)]);
//t2
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 1, zi - 1)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 0, zi - 0)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 1, zi - 0)]);
}
else
{
//t1
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 1, zi - 1)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 0, zi - 0)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 0, zi - 1)]);
//t2
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 1, zi - 0)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 0, zi - 0)]);
_trianglesBuffer.Add(indexes[new Vector3Int(xi, yi - 1, zi - 1)]);
}
}
}
}
}
}
return(_trianglesBuffer);
}
