//------------------------------------------------
public void SimplifyMesh(double threshold, TraceListener log, bool verbose)
{
var edgePoints = EdgeIndices.Select(p => Vertices[p]).ToArray();
double fudgeSq = double.MaxValue;
for (int i = 1; i < edgePoints.Length; i++)
{
var d = edgePoints[i].DeltaSq(ref edgePoints[i - 1]);
if (d > 1.0E-10)
{
fudgeSq = Math.Min(fudgeSq, d);
}
}
fudgeSq /= 100.0;
var mdFinal = new SimplifyMesh(log, Vertices, TriangleIndices, EdgeIndices, verbose);
mdFinal.SimplifyMeshByThreshold(threshold);
Vertices = mdFinal.GetVertices();
TriangleIndices = mdFinal.GetIndices();
VertexNormals = mdFinal.GetVertexNormals();
EdgeIndices = mdFinal.GetEdgeIndices();
mdFinal = null;
VertexToImage = new Vector2d[Vertices.Length];
GeoPolar3d buffGeoPolar = new GeoPolar3d();
for (int i = 0; i < VertexToImage.Length; i++)
{
InvertTo(ref Vertices[i], ref VertexToImage[i], ref buffGeoPolar);
}
}
public ComplexMesh(Vector3d[][] grid, TraceListener log, double threshold = 0.0001)
{
this.log = log;
var reducedPositions = new List <Vector3d>();
var reducedTriangleIndices = new List <int>();
var reducedExternalIndices = new List <int>();
var max = grid.Length;
// The min distance between vertices is at the corners
var cornerDists = new double[]
{
grid[0][0].DeltaSq(ref grid[0][1]),
grid[0][0].DeltaSq(ref grid[1][0]),
grid[max - 1][0].DeltaSq(ref grid[max - 1][1]),
grid[max - 1][0].DeltaSq(ref grid[max - 2][0]),
grid[0][max - 1].DeltaSq(ref grid[0][max - 2]),
grid[0][max - 1].DeltaSq(ref grid[1][max - 1]),
grid[max - 1][max - 1].DeltaSq(ref grid[max - 1][max - 2]),
grid[max - 1][max - 1].DeltaSq(ref grid[max - 2][max - 1]),
};
double fudgeSq = cornerDists.Min() / 100.0;
int numChunks = 9;
int chunkMax = max / numChunks;
bool verbose = false;
List <int> chunkIs = new List <int>();
List <int> chunkJs = new List <int>();
for (int i = 0; i < numChunks; i++)
{
chunkIs.Add(i);
chunkJs.Add(i);
}
var chunkInfos = new ChunkInfo[chunkIs.Count][];
foreach (int chunkI in chunkIs)
{
chunkInfos[chunkI - chunkIs.Min()] = new ChunkInfo[chunkJs.Count];
int iMin = chunkI * chunkMax;
int iMax = (chunkI < numChunks - 1 ? chunkMax * (chunkI + 1) + 1 : max);
int iCount = iMax - iMin;
foreach (int chunkJ in chunkJs)
{
log?.WriteLine(DateTime.Now + "\tWorking on chunk (" + (chunkI - chunkIs.Min()) + "," + (chunkJ - chunkJs.Min()) + ") " +
"(" + (((chunkI - chunkIs.Min()) * chunkJs.Count) + (chunkJ - chunkJs.Min())) + "/" + (chunkIs.Count * chunkJs.Count) + ")");
int jMin = chunkJ * chunkMax;
int jMax = (chunkJ < numChunks - 1 ? chunkMax * (chunkJ + 1) + 1 : max);
int jCount = jMax - jMin;
int vid = 0;
Vector3d[] positions = new Vector3d[iCount * jCount];
List <int> edgeIndices = new List <int>();
List <Vector3d> edges = new List <Vector3d>();
List <Vector3d> exteriors = new List <Vector3d>();
for (int i = iMin; i < iMax; i++)
{
for (int j = jMin; j < jMax; j++)
{
int iPrime = (max - 1 - i) * grid.Length / max;
int jPrime = (j) * grid[0].Length / max;
var v = grid[jPrime][iPrime];
if (i == iMin || i == (iMax - 1) || j == jMin || j == (jMax - 1))
{
edgeIndices.Add(vid);
edges.Add(v);
}
if ((chunkI == chunkIs.Min() && i == iMin) ||
(chunkI == chunkIs.Max() && i == iMax - 1) ||
(chunkJ == chunkJs.Min() && j == jMin) ||
(chunkJ == chunkJs.Max() && j == jMax - 1))
{
exteriors.Add(v);
}
positions[vid++] = v;
}
}
// Create a collection of triangle indices
int tid = 0;
int[] triangleIncides = new int[(iCount - 1) * (jCount - 1) * 6];
for (int i = 0; i < iCount - 1; i++)
{
for (int j = 0; j < jCount - 1; j++)
{
triangleIncides[tid++] = (i + 0) * jCount + (j + 0);
triangleIncides[tid++] = (i + 1) * jCount + (j + 0);
triangleIncides[tid++] = (i + 0) * jCount + (j + 1);
triangleIncides[tid++] = (i + 1) * jCount + (j + 1);
triangleIncides[tid++] = (i + 0) * jCount + (j + 1);
triangleIncides[tid++] = (i + 1) * jCount + (j + 0);
}
}
var md = new SimplifyMesh(log, positions.ToArray(), triangleIncides.ToArray(), edgeIndices.ToArray(), verbose);
positions = null;
triangleIncides = null;
ChunkInfo chunkInfo = new ChunkInfo()
{
I = chunkI - chunkIs.Min(), J = chunkJ - chunkJs.Min()
};
md.SimplifyMeshByThreshold(threshold);
var startIndex = reducedPositions.Count;
var vertices = md.GetVertices();
reducedPositions.AddRange(vertices);
chunkInfo.EdgeIndices.AddRange(GetVertexIndices(vertices, edges, fudgeSq).Select(ei => ei + startIndex));
reducedExternalIndices.AddRange(GetVertexIndices(vertices, exteriors, fudgeSq).Select(exti => exti + startIndex));
reducedTriangleIndices.AddRange(md.GetIndices().Select(ti => ti + startIndex));
vertices = null;
edges = null;
exteriors = null;
md = null;
chunkInfos[chunkI - chunkIs.Min()][chunkJ - chunkJs.Min()] = chunkInfo;
// Clear out unused objects
GC.Collect();
}
}
var reducedPositionsArray = reducedPositions.ToArray();
reducedPositions = null;
var reducedTriangleIndicesArray = reducedTriangleIndices.ToArray();
reducedTriangleIndices = null;
var edgePoints = reducedExternalIndices.Select(p => reducedPositionsArray[p]).ToArray();
GlueChunks(reducedPositionsArray, reducedTriangleIndicesArray, chunkInfos, fudgeSq);
var mdFinal = new SimplifyMesh(log, reducedPositionsArray, reducedTriangleIndicesArray, reducedExternalIndices.ToArray(), verbose);
reducedPositionsArray = null;
reducedTriangleIndicesArray = null;
mdFinal.SimplifyMeshByThreshold(threshold);
Vertices = mdFinal.GetVertices();
TriangleIndices = mdFinal.GetIndices();
EdgeIndices = GetVertexIndices(Vertices, edgePoints, fudgeSq).ToArray();
VertexNormals = mdFinal.GetVertexNormals();
mdFinal = null;
}
