private static void CellEdges()
{
vtkTriangle triangle = vtkTriangle.New();
triangle.GetPoints().SetPoint(0, 1.0, 0.0, 0.0);
triangle.GetPoints().SetPoint(1, 0.0, 0.0, 0.0);
triangle.GetPoints().SetPoint(2, 0.0, 1.0, 0.0);
triangle.GetPointIds().SetId(0, 0);
triangle.GetPointIds().SetId(1, 1);
triangle.GetPointIds().SetId(2, 2);
Console.WriteLine("The cell has " + triangle.GetNumberOfEdges() + " edges.");
for (int i = 0; i < triangle.GetNumberOfEdges(); i++)
{
vtkCell edge = triangle.GetEdge(i);
vtkIdList pointIdList = edge.GetPointIds();
Console.WriteLine("Edge " + i + " has " + pointIdList.GetNumberOfIds() + " points.");
for (int p = 0; p < pointIdList.GetNumberOfIds(); p++)
{
Console.WriteLine("Edge " + i + " uses point " + pointIdList.GetId(p));
}
}
}
private static void IterateOverLines()
{
double[] origin = new double[] { 0.0, 0.0, 0.0 };
double[,] p = new double[, ] {
{ 1.0, 0.0, 0.0 },
{ 0.0, 1.0, 0.0 },
{ 0.0, 1.0, 2.0 },
{ 1.0, 2.0, 3.0 }
};
// Create a vtkPoints object and store the points in it
vtkPoints points = vtkPoints.New();
points.InsertNextPoint(origin[0], origin[1], origin[2]);
for (int i = 0; i < 4; i++)
{
points.InsertNextPoint(p[i, 0], p[i, 1], p[i, 2]);
}
// Create a cell array to store the lines in and add the lines to it
vtkCellArray lines = vtkCellArray.New();
// Create four lines
for (int i = 0; i < 4; i++)
{
vtkLine line = vtkLine.New();
line.GetPointIds().SetId(0, i);
line.GetPointIds().SetId(1, i + 1);
lines.InsertNextCell(line);
}
// Create a polydata to store everything in
vtkPolyData linesPolyData = vtkPolyData.New();
// Add the points to the dataset
linesPolyData.SetPoints(points);
// Add the lines to the dataset
linesPolyData.SetLines(lines);
Console.WriteLine("There are " + linesPolyData.GetNumberOfLines() + " lines.");
linesPolyData.GetLines().InitTraversal();
vtkIdList idList = vtkIdList.New();
while (linesPolyData.GetLines().GetNextCell(idList) != 0)
{
Console.WriteLine("Line has " + idList.GetNumberOfIds() + " points.");
for (int pointId = 0; pointId < idList.GetNumberOfIds(); pointId++)
{
Console.Write(idList.GetId(pointId) + " ");
}
Console.Write(Environment.NewLine);
}
}
private int ImportCellIndices(int currentIndexNumber, vtkIdList cellIndices)
{
int numberOfIndices = cellIndices.GetNumberOfIds();
for (int j = 0; j < numberOfIndices; j++)
{
Indices[currentIndexNumber] = cellIndices.GetId(j);
currentIndexNumber += 1;
}
return(currentIndexNumber);
}
private void DrawMesh()
{
#if USE_VTK
var renderer = this.renderWindowControl.RenderWindow.GetRenderers().GetFirstRenderer();
if (this.actor != null)
{
renderer.RemoveActor(this.actor);
this.actor.Dispose();
this.actor = null;
}
var points = vtkPoints.New();
points.SetNumberOfPoints(_mesh.VertexCount);
int index = 0;
foreach (var vertex in _mesh.Vertices())
{
points.SetPoint(index++, vertex.x, vertex.y, vertex.z);
}
var triangles = vtkCellArray.New();
triangles.Allocate(triangles.EstimateSize(_mesh.TriangleCount, 3), _mesh.TriangleCount / 2);
foreach (var triangle in _mesh.Triangles())
{
vtkIdList verts = vtkIdList.New();
verts.InsertNextId(triangle.a);
verts.InsertNextId(triangle.b);
verts.InsertNextId(triangle.c);
triangles.InsertNextCell(verts);
}
var polyData = vtkPolyData.New();
polyData.SetPoints(points);
polyData.SetPolys(triangles);
points.Dispose();
triangles.Dispose();
var mapper = vtkPolyDataMapper.New();
mapper.SetInput(polyData);
actor = vtkActor.New();
actor.SetMapper(mapper);
renderer.AddActor(actor);
this.renderWindowControl.RenderWindow.Render();
#endif
}
public vtkUnstructuredGrid VtkGrid(double x_offset = 0.0, double y_offset = 0.0, double z_offset = 0.0)
{
vtkUnstructuredGrid grid = vtkUnstructuredGrid.New();
// Points
vtkPoints points = vtkPoints.New();
_nodes.ForEach(n => points.InsertNextPoint(n.X + x_offset, n.Y + y_offset, n.Z + z_offset));
grid.SetPoints(points);
// Cells
//vtkCellArray cellArray = vtkCellArray.New();
_elements.ForEach(e =>
{
switch (e.ElementType)
{
case GmshMeshElementType.HEXA_8NODE:
{
vtkHexahedron hex = vtkHexahedron.New();
vtkIdList hexIDList = hex.GetPointIds();
for (int i = 0; i < e.NumberOfNodes; ++i)
{
hexIDList.SetId(i, e.Nodes[i] - 1);
}
grid.InsertNextCell(hex.GetCellType(), hex.GetPointIds());
}
break;
case GmshMeshElementType.TET_4NODE:
{
vtkTetra tet = vtkTetra.New();
vtkIdList tetIDList = tet.GetPointIds();
for (int i = 0; i < e.NumberOfNodes; ++i)
{
tetIDList.SetId(i, e.Nodes[i] - 1);
}
grid.InsertNextCell(tet.GetCellType(), tet.GetPointIds());
}
break;
case GmshMeshElementType.QUAD_4NODE:
{
vtkQuad quad = vtkQuad.New();
vtkIdList quadIDList = quad.GetPointIds();
for (int i = 0; i < e.NumberOfNodes; ++i)
{
quadIDList.SetId(i, e.Nodes[i] - 1);
}
grid.InsertNextCell(quad.GetCellType(), quad.GetPointIds());
}
break;
case GmshMeshElementType.TRIANGLE_3NODE:
{
vtkTriangle tri = vtkTriangle.New();
vtkIdList triIDList = tri.GetPointIds();
for (int i = 0; i < e.NumberOfNodes; ++i)
{
triIDList.SetId(i, e.Nodes[i] - 1);
}
grid.InsertNextCell(tri.GetCellType(), tri.GetPointIds());
}
break;
case GmshMeshElementType.PRISM_6NODE:
default:
break;
}
}
);
return(grid);
}
public void Read_Unstructured_Grid_File(string filename)
{
// Initalize VTK Reader
vtkXMLUnstructuredGridReader reader = new vtkXMLUnstructuredGridReader();
reader.SetFileName(filename);
reader.Update();
vtkUnstructuredGrid grid = reader.GetOutput();
vtkCellArray data = grid.GetCells();
vtkIdList idList = vtkIdList.New();
int numCells = (int)data.GetNumberOfCells();
if (numCells != 0)
{
if (grid.GetCellType(0) == 10)
{
isTetra = true;
Console.WriteLine("Celltype is tetra");
}
else if (grid.GetCellType(0) == 5)
{
isTetra = false;
Console.WriteLine("Celltype is triangle");
}
else
{
Console.WriteLine("No valid celltype");
}
for (int i = 0; i < numCells; i++)
{
long cellTypeID = grid.GetCellType(i);
// alle punkte durchlaufen und in eine Variable für jeden Punkt die anderen drei Punkte speichern
if (isTetra)
{
Vector4 tetraPoint = new Vector4();
grid.GetCellPoints(i, idList);
// ueber alle vier punkte iterieren und diese in extra liste für jeden Punkt speichern
for (int j = 0; j < 4; j++)
{
tetraPoint[j] = idList.GetId(j);
}
tetraPoints.Add(tetraPoint);
}
else if (!isTetra)
{
Vector3 triangle = new Vector3();
grid.GetCellPoints(i, idList);
// ueber alle drei punkte iterieren und diese in extra liste für jeden Punkt speichern
for (int j = 0; j < 3; j++)
{
triangle[j] = idList.GetId(j);
}
trianglePoints.Add(triangle);
}
}
}
// Read Point Coordinates
vtkPoints points = grid.GetPoints();
int numPoints = (int)points.GetNumberOfPoints();
List <Vector3d> point_dat = new List <Vector3d>();
if (numPoints != 0)
{
// Read Point Data
double[] pt;
for (int i = 0; i < numPoints; i++)
{
pt = points.GetPoint(i);
point_dat.Add(new Vector3d((float)pt[0], (float)pt[1], (float)pt[2]));
}
if (this.vertex_data.ContainsKey("vertices"))
{
this.vertex_data["vertices"] = point_dat;
}
else
{
this.vertex_data.Add("vertices", point_dat);
}
Console.WriteLine("All points read in correctly!");
}
else
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("---------------No Points existent");
}
vtkPointData pointData = grid.GetPointData();
// Load point attributes
this.Load_Point_Attributes(pointData);
}