vtkContourGrid Class Reference
#include <vtkContourGrid.h>
Inheritance diagram for vtkContourGrid:
[legend]Collaboration diagram for vtkContourGrid:
[legend]List of all members.
Detailed Description
generate isosurfaces/isolines from scalar values (specialized for unstructured grids)
vtkContourGrid is a filter that takes as input datasets of type vtkUnstructuredGrid and generates on output isosurfaces and/or isolines. The exact form of the output depends upon the dimensionality of the input data. Data consisting of 3D cells will generate isosurfaces, data consisting of 2D cells will generate isolines, and data with 1D or 0D cells will generate isopoints. Combinations of output type are possible if the input dimension is mixed.
To use this filter you must specify one or more contour values. You can either use the method SetValue() to specify each contour value, or use GenerateValues() to generate a series of evenly spaced contours. It is also possible to accelerate the operation of this filter (at the cost of extra memory) by using a vtkScalarTree. A scalar tree is used to quickly locate cells that contain a contour surface. This is especially effective if multiple contours are being extracted. If you want to use a scalar tree, invoke the method UseScalarTreeOn().
If the input data is structured, consider using a filter that is optimized for structured data. These can be found in the patented classes of vtk.
- Warning:
- For unstructured data or structured grids, normals and gradients are not computed. Use vtkPolyDataNormals to compute the surface normals of the resulting isosurface.
- See also:
- vtkMarchingContourFilter vtkKitwareContourFilter vtkMarchingCubes vtkSliceCubes vtkDividingCubes vtkMarchingSquares vtkImageMarchingCubes
- Created by:
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- CVS contributions (if > 5%):
- Henderson, Amy (59%)
- Martin, Ken (17%)
- Schroeder, Will (8%)
- CVS logs (CVSweb):
/Graphics/vtkContourGrid.h)/Graphics/vtkContourGrid.cxx)
Definition at line 74 of file vtkContourGrid.h.
Member Typedef Documentation
Constructor & Destructor Documentation
| vtkContourGrid::vtkContourGrid |
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Member Function Documentation
| virtual const char* vtkContourGrid::GetClassName |
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| int vtkContourGrid::IsTypeOf |
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const char * |
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Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h.
Reimplemented from vtkUnstructuredGridToPolyDataFilter. |
| virtual int vtkContourGrid::IsA |
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const char * |
type |
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Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h.
Reimplemented from vtkUnstructuredGridToPolyDataFilter. |
| void vtkContourGrid::PrintSelf |
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ostream & |
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vtkIndent |
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Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.
Reimplemented from vtkUnstructuredGridToPolyDataFilter. |
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Construct object with initial range (0,1) and single contour value of 0.0.
Reimplemented from vtkAlgorithm. |
| void vtkContourGrid::SetValue |
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int |
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double |
value |
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| double vtkContourGrid::GetValue |
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int |
i |
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| double * vtkContourGrid::GetValues |
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| void vtkContourGrid::GetValues |
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double * |
contourValues |
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| void vtkContourGrid::SetNumberOfContours |
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int |
number |
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| int vtkContourGrid::GetNumberOfContours |
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| void vtkContourGrid::GenerateValues |
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int |
numContours, |
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double |
range[2] |
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| void vtkContourGrid::GenerateValues |
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int |
numContours, |
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double |
rangeStart, |
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double |
rangeEnd |
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| unsigned long vtkContourGrid::GetMTime |
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| virtual void vtkContourGrid::SetComputeNormals |
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int |
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Set/Get the computation of normals. Normal computation is fairly expensive in both time and storage. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. |
| virtual int vtkContourGrid::GetComputeNormals |
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Set/Get the computation of normals. Normal computation is fairly expensive in both time and storage. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. |
| virtual void vtkContourGrid::ComputeNormalsOn |
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Set/Get the computation of normals. Normal computation is fairly expensive in both time and storage. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. |
| virtual void vtkContourGrid::ComputeNormalsOff |
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Set/Get the computation of normals. Normal computation is fairly expensive in both time and storage. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. |
| virtual void vtkContourGrid::SetComputeGradients |
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int |
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Set/Get the computation of gradients. Gradient computation is fairly expensive in both time and storage. Note that if ComputeNormals is on, gradients will have to be calculated, but will not be stored in the output dataset. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. |
| virtual int vtkContourGrid::GetComputeGradients |
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Set/Get the computation of gradients. Gradient computation is fairly expensive in both time and storage. Note that if ComputeNormals is on, gradients will have to be calculated, but will not be stored in the output dataset. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. |
| virtual void vtkContourGrid::ComputeGradientsOn |
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Set/Get the computation of gradients. Gradient computation is fairly expensive in both time and storage. Note that if ComputeNormals is on, gradients will have to be calculated, but will not be stored in the output dataset. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. |
| virtual void vtkContourGrid::ComputeGradientsOff |
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Set/Get the computation of gradients. Gradient computation is fairly expensive in both time and storage. Note that if ComputeNormals is on, gradients will have to be calculated, but will not be stored in the output dataset. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. |
| virtual void vtkContourGrid::SetComputeScalars |
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int |
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Set/Get the computation of scalars. |
| virtual int vtkContourGrid::GetComputeScalars |
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Set/Get the computation of scalars. |
| virtual void vtkContourGrid::ComputeScalarsOn |
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Set/Get the computation of scalars. |
| virtual void vtkContourGrid::ComputeScalarsOff |
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Set/Get the computation of scalars. |
| virtual void vtkContourGrid::SetUseScalarTree |
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int |
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Enable the use of a scalar tree to accelerate contour extraction. |
| virtual int vtkContourGrid::GetUseScalarTree |
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Enable the use of a scalar tree to accelerate contour extraction. |
| virtual void vtkContourGrid::UseScalarTreeOn |
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Enable the use of a scalar tree to accelerate contour extraction. |
| virtual void vtkContourGrid::UseScalarTreeOff |
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Enable the use of a scalar tree to accelerate contour extraction. |
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Set / get a spatial locator for merging points. By default, an instance of vtkMergePoints is used. |
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Set / get a spatial locator for merging points. By default, an instance of vtkMergePoints is used. |
| void vtkContourGrid::CreateDefaultLocator |
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Create default locator. Used to create one when none is specified. The locator is used to merge coincident points. |
| virtual char* vtkContourGrid::GetInputScalarsSelection |
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If you want to contour by an arbitrary array, then set its name here. By default this in NULL and the filter will use the active scalar array. |
| void vtkContourGrid::SelectInputScalars |
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const char * |
fieldName |
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If you want to contour by an arbitrary array, then set its name here. By default this in NULL and the filter will use the active scalar array.
Definition at line 151 of file vtkContourGrid.h. |
| void vtkContourGrid::Execute |
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This method is the old style execute method
Reimplemented from vtkSource. |
| virtual void vtkContourGrid::SetInputScalarsSelection |
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const char * |
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Member Data Documentation
The documentation for this class was generated from the following file: