public static SoftBody CreateFromVtkFile(SoftBodyWorldInfo worldInfo, string fileName)
{
List <Vector3> points = new List <Vector3>(0);
List <int[]> cells = new List <int[]>(0);
using (var reader = new StreamReader(fileName))
{
bool readingPoints = false;
bool readingCells = false;
string line;
while ((line = reader.ReadLine()) != null)
{
if (line.Length == 0)
{
continue;
}
string[] lineParts = line.Split(' ');
if (lineParts[0] == "POINTS")
{
readingPoints = true;
readingCells = false;
points.Capacity = int.Parse(lineParts[1]);
}
else if (lineParts[0] == "CELLS")
{
readingPoints = false;
readingCells = true;
cells.Capacity = int.Parse(lineParts[1]);
}
else if (lineParts[0] == "CELL_TYPES")
{
readingPoints = false;
readingCells = false;
}
else if (readingPoints)
{
Vector3 point = new Vector3(
(float)ParseDouble(lineParts[0]),
(float)ParseDouble(lineParts[1]),
(float)ParseDouble(lineParts[2]));
points.Add(point);
}
else if (readingCells)
{
int numPoints = int.Parse(lineParts[0]);
int[] cell = new int[numPoints];
for (int i = 0; i < numPoints; i++)
{
cell[i] = int.Parse(lineParts[i + 1]);
}
cells.Add(cell);
}
}
}
SoftBody body = new SoftBody(worldInfo, points.Count, points.ToArray(), null);
foreach (int[] cell in cells)
{
body.AppendTetra(cell[0], cell[1], cell[2], cell[3]);
body.AppendLink(cell[0], cell[1], null, true);
body.AppendLink(cell[1], cell[2], null, true);
body.AppendLink(cell[2], cell[0], null, true);
body.AppendLink(cell[0], cell[3], null, true);
body.AppendLink(cell[1], cell[3], null, true);
body.AppendLink(cell[2], cell[3], null, true);
}
GenerateBoundaryFaces(body);
body.InitializeDmInverse();
body.TetraScratches.Resize(body.Tetras.Count);
body.TetraScratchesTn.Resize(body.Tetras.Count);
//Console.WriteLine($"Nodes: {body.Nodes.Count}");
//Console.WriteLine($"Links: {body.Links.Count}");
//Console.WriteLine($"Faces: {body.Faces.Count}");
//Console.WriteLine($"Tetras: {body.Tetras.Count}");
return(body);
}
public static SoftBody CreateFromTetGenData(SoftBodyWorldInfo worldInfo,
string ele, string face, string node, bool faceLinks, bool tetraLinks, bool facesFromTetras)
{
CultureInfo culture = CultureInfo.InvariantCulture;
char[] separator = new[] { ' ' };
Vector3[] pos;
using (var nodeReader = new StringReader(node))
{
string[] nodeHeader = nodeReader.ReadLine().Split(separator, StringSplitOptions.RemoveEmptyEntries);
int numNodes = int.Parse(nodeHeader[0]);
//int numDims = int.Parse(nodeHeader[1]);
//int numAttrs = int.Parse(nodeHeader[2]);
//bool hasBounds = !nodeHeader[3].Equals("0");
pos = new Vector3[numNodes];
for (int n = 0; n < numNodes; n++)
{
string[] nodeLine = nodeReader.ReadLine().Split(separator, StringSplitOptions.RemoveEmptyEntries);
pos[int.Parse(nodeLine[0])] = new Vector3(
double.Parse(nodeLine[1], culture),
double.Parse(nodeLine[2], culture),
double.Parse(nodeLine[3], culture));
}
}
var psb = new SoftBody(worldInfo, pos.Length, pos, null);
/*
* if (!string.IsNullOrEmpty(face))
* {
* throw new NotImplementedException();
* }
*/
if (!string.IsNullOrEmpty(ele))
{
using (var eleReader = new StringReader(ele))
{
string[] eleHeader = eleReader.ReadLine().Split(separator, StringSplitOptions.RemoveEmptyEntries);
int numTetras = int.Parse(eleHeader[0]);
//int numCorners = int.Parse(eleHeader[1]);
//int numAttrs = int.Parse(eleHeader[2]);
for (int n = 0; n < numTetras; n++)
{
string[] eleLine = eleReader.ReadLine().Split(separator, StringSplitOptions.RemoveEmptyEntries);
//int index = int.Parse(eleLine[0], culture);
int ni0 = int.Parse(eleLine[1], culture);
int ni1 = int.Parse(eleLine[2], culture);
int ni2 = int.Parse(eleLine[3], culture);
int ni3 = int.Parse(eleLine[4], culture);
psb.AppendTetra(ni0, ni1, ni2, ni3);
if (tetraLinks)
{
psb.AppendLink(ni0, ni1, null, true);
psb.AppendLink(ni1, ni2, null, true);
psb.AppendLink(ni2, ni0, null, true);
psb.AppendLink(ni0, ni3, null, true);
psb.AppendLink(ni1, ni3, null, true);
psb.AppendLink(ni2, ni3, null, true);
}
}
}
}
//Console.WriteLine("Nodes: {0}", psb.Nodes.Count);
//Console.WriteLine("Links: {0}", psb.Links.Count);
//Console.WriteLine("Faces: {0}", psb.Faces.Count);
//Console.WriteLine("Tetras: {0}", psb.Tetras.Count);
return(psb);
}
SoftBody CreateVolumetricSoftbody(SoftBodyWorldInfo worldInfo, BulletSharp.Math.Vector3[] vertices)
{
int vertexcount = vertices.Length;
psb = new SoftBody(worldInfo, vertexcount, vertices, null);
for (int x = 3; vertexcount > x; x += 4)
{
int n0 = x - 3;
int n1 = x - 2;
int n2 = x - 1;
int n3 = x - 0;
psb.AppendTetra(n0, n1, n2, n3);
psb.AppendLink(n0, n1);
linkdata.Add(true);
brokenlinks.Add(false);
psb.AppendLink(n1, n2);
linkdata.Add(true);
brokenlinks.Add(false);
psb.AppendLink(n2, n0);
linkdata.Add(true);
brokenlinks.Add(false);
psb.AppendLink(n0, n3);
linkdata.Add(true);
brokenlinks.Add(false);
psb.AppendLink(n1, n3);
linkdata.Add(true);
brokenlinks.Add(false);
psb.AppendLink(n2, n3);
linkdata.Add(true);
brokenlinks.Add(false);
ValidTetras.Add(true);
}
instances = GetInstances(vertices);
//List<bool> ValidCuts = CutTest3(vertices);
for (int x = 0; instances.Count > x; x++)
{
//if (ValidCuts[x] == false)
{
// continue;
}
for (int i = 1; instances[x].Count > i; i++)
{
int i1 = instances[x][i - 1];
int i2 = instances[x][i - 0];
psb.AppendLink(i1, i2);
linkdata.Add(false);
brokenlinks.Add(false);
}
}
return(psb);
}