FreeMat: vtkTriangle

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vtkTriangle

Section: Visualization Toolkit Filtering Classes

# Usage

vtkTriangle is a concrete implementation of vtkCell to represent a triangle located in 3-space.

To create an instance of class vtkTriangle, simply invoke its constructor as follows

      obj = vtkTriangle

# Methods

The class vtkTriangle has several methods that can be used. They are listed below. Note that the documentation is translated automatically from the VTK sources, and may not be completely intelligible. When in doubt, consult the VTK website. In the methods listed below, `obj` is an instance of the vtkTriangle class.

- `string = obj.GetClassName ()`
- `int = obj.IsA (string name)`
- `vtkTriangle = obj.NewInstance ()`
- `vtkTriangle = obj.SafeDownCast (vtkObject o)`
- `vtkCell = obj.GetEdge (int edgeId)` - Get the edge specified by edgeId (range 0 to 2) and return that edge's coordinates.
- `int = obj.GetCellType ()` - See the vtkCell API for descriptions of these methods.
- `int = obj.GetCellDimension ()` - See the vtkCell API for descriptions of these methods.
- `int = obj.GetNumberOfEdges ()` - See the vtkCell API for descriptions of these methods.
- `int = obj.GetNumberOfFaces ()` - See the vtkCell API for descriptions of these methods.
- `vtkCell = obj.GetFace (int )` - See the vtkCell API for descriptions of these methods.
- `int = obj.CellBoundary (int subId, double pcoords[3], vtkIdList pts)` - See the vtkCell API for descriptions of these methods.
- `obj.Contour (double value, vtkDataArray cellScalars, vtkIncrementalPointLocator locator, vtkCellArray verts, vtkCellArray lines, vtkCellArray polys, vtkPointData inPd, vtkPointData outPd, vtkCellData inCd, vtkIdType cellId, vtkCellData outCd)` - See the vtkCell API for descriptions of these methods.
- `int = obj.Triangulate (int index, vtkIdList ptIds, vtkPoints pts)` - See the vtkCell API for descriptions of these methods.
- `obj.Derivatives (int subId, double pcoords[3], double values, int dim, double derivs)` - See the vtkCell API for descriptions of these methods.
- `double = obj.ComputeArea ()` - A convenience function to compute the area of a vtkTriangle.
- `obj.Clip (double value, vtkDataArray cellScalars, vtkIncrementalPointLocator locator, vtkCellArray polys, vtkPointData inPd, vtkPointData outPd, vtkCellData inCd, vtkIdType cellId, vtkCellData outCd, int insideOut)` - Clip this triangle using scalar value provided. Like contouring, except that it cuts the triangle to produce other triangles.
- `obj.InterpolateFunctions (double pcoords[3], double sf[3])` - Compute the interpolation functions/derivatives (aka shape functions/derivatives)
- `obj.InterpolateDerivs (double pcoords[3], double derivs[6])` - Return the ids of the vertices defining edge (`edgeId`). Ids are related to the cell, not to the dataset.
- `int = obj.GetParametricCenter (double pcoords[3])` - Return the center of the triangle in parametric coordinates.
- `double = obj.GetParametricDistance (double pcoords[3])` - Return the distance of the parametric coordinate provided to the cell. If inside the cell, a distance of zero is returned.