FreeMat: vtkQuadraticWedge

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vtkQuadraticWedge

Section: Visualization Toolkit Filtering Classes

# Usage

vtkQuadraticWedge is a concrete implementation of vtkNonLinearCell to represent a three-dimensional, 15-node isoparametric parabolic wedge. The interpolation is the standard finite element, quadratic isoparametric shape function. The cell includes a mid-edge node. The ordering of the fifteen points defining the cell is point ids (0-5,6-14) where point ids 0-5 are the six corner vertices of the wedge; followed by nine midedge nodes (6-14). Note that these midedge nodes correspond lie on the edges defined by (0,1), (1,2), (2,0), (3,4), (4,5), (5,3), (0,3), (1,4), (2,5).

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

      obj = vtkQuadraticWedge

# Methods

The class vtkQuadraticWedge 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 vtkQuadraticWedge class.

- `string = obj.GetClassName ()`
- `int = obj.IsA (string name)`
- `vtkQuadraticWedge = obj.NewInstance ()`
- `vtkQuadraticWedge = obj.SafeDownCast (vtkObject o)`
- `int = obj.GetCellType ()` - Implement the vtkCell API. See the vtkCell API for descriptions of these methods.
- `int = obj.GetCellDimension ()` - Implement the vtkCell API. See the vtkCell API for descriptions of these methods.
- `int = obj.GetNumberOfEdges ()` - Implement the vtkCell API. See the vtkCell API for descriptions of these methods.
- `int = obj.GetNumberOfFaces ()` - Implement the vtkCell API. See the vtkCell API for descriptions of these methods.
- `vtkCell = obj.GetEdge (int edgeId)` - Implement the vtkCell API. See the vtkCell API for descriptions of these methods.
- `vtkCell = obj.GetFace (int faceId)` - Implement the vtkCell API. See the vtkCell API for descriptions of these methods.
- `int = obj.CellBoundary (int subId, double pcoords[3], vtkIdList pts)`
- `obj.Contour (double value, vtkDataArray cellScalars, vtkIncrementalPointLocator locator, vtkCellArray verts, vtkCellArray lines, vtkCellArray polys, vtkPointData inPd, vtkPointData outPd, vtkCellData inCd, vtkIdType cellId, vtkCellData outCd)`
- `int = obj.Triangulate (int index, vtkIdList ptIds, vtkPoints pts)`
- `obj.Derivatives (int subId, double pcoords[3], double values, int dim, double derivs)`
- `obj.Clip (double value, vtkDataArray cellScalars, vtkIncrementalPointLocator locator, vtkCellArray tetras, vtkPointData inPd, vtkPointData outPd, vtkCellData inCd, vtkIdType cellId, vtkCellData outCd, int insideOut)` - Clip this quadratic hexahedron using scalar value provided. Like contouring, except that it cuts the hex to produce linear tetrahedron.
- `int = obj.GetParametricCenter (double pcoords[3])` - Return the center of the quadratic wedge in parametric coordinates.
- `obj.InterpolateFunctions (double pcoords[3], double weights[15])` - Compute the interpolation functions/derivatives (aka shape functions/derivatives)
- `obj.InterpolateDerivs (double pcoords[3], double derivs[45])` - Return the ids of the vertices defining edge/face (`edgeId`/`faceId'). Ids are related to the cell, not to the dataset.