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().
- 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
Definition at line 59 of file vtkContourGrid.h.
Member Typedef Documentation
Constructor & Destructor Documentation
| vtkContourGrid::vtkContourGrid |
( |
|
) |
[protected] |
|
| vtkContourGrid::~vtkContourGrid |
( |
|
) |
[protected] |
|
Member Function Documentation
| virtual const char* vtkContourGrid::GetClassName |
( |
|
) |
[virtual] |
|
| static int vtkContourGrid::IsTypeOf |
( |
const char * |
type |
) |
[static] |
|
|
|
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 vtkPolyDataAlgorithm. |
| virtual int vtkContourGrid::IsA |
( |
const char * |
type |
) |
[virtual] |
|
|
|
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 vtkPolyDataAlgorithm. |
| void vtkContourGrid::PrintSelf |
( |
ostream & |
os, |
|
|
vtkIndent |
indent |
|
) |
[virtual] |
|
|
|
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 vtkPolyDataAlgorithm. |
|
|
Construct object with initial range (0,1) and single contour value of 0.0.
Reimplemented from vtkPolyDataAlgorithm. |
| void vtkContourGrid::SetValue |
( |
int |
i, |
|
|
double |
value |
|
) |
[inline] |
|
| double vtkContourGrid::GetValue |
( |
int |
i |
) |
[inline] |
|
| double * vtkContourGrid::GetValues |
( |
|
) |
[inline] |
|
| void vtkContourGrid::GetValues |
( |
double * |
contourValues |
) |
[inline] |
|
| void vtkContourGrid::SetNumberOfContours |
( |
int |
number |
) |
[inline] |
|
| int vtkContourGrid::GetNumberOfContours |
( |
|
) |
[inline] |
|
| void vtkContourGrid::GenerateValues |
( |
int |
numContours, |
|
|
double |
range[2] |
|
) |
[inline] |
|
| void vtkContourGrid::GenerateValues |
( |
int |
numContours, |
|
|
double |
rangeStart, |
|
|
double |
rangeEnd |
|
) |
[inline] |
|
| unsigned long vtkContourGrid::GetMTime |
( |
|
) |
[virtual] |
|
| virtual void vtkContourGrid::SetComputeNormals |
( |
int |
|
) |
[virtual] |
|
|
|
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 |
( |
|
) |
[virtual] |
|
| virtual void vtkContourGrid::ComputeNormalsOn |
( |
|
) |
[virtual] |
|
| virtual void vtkContourGrid::ComputeNormalsOff |
( |
|
) |
[virtual] |
|
| virtual void vtkContourGrid::SetComputeGradients |
( |
int |
|
) |
[virtual] |
|
|
|
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 |
( |
|
) |
[virtual] |
|
|
|
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 |
( |
|
) |
[virtual] |
|
|
|
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 |
( |
|
) |
[virtual] |
|
|
|
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 |
( |
int |
|
) |
[virtual] |
|
|
|
Set/Get the computation of scalars. |
| virtual int vtkContourGrid::GetComputeScalars |
( |
|
) |
[virtual] |
|
|
|
Set/Get the computation of scalars. |
| virtual void vtkContourGrid::ComputeScalarsOn |
( |
|
) |
[virtual] |
|
|
|
Set/Get the computation of scalars. |
| virtual void vtkContourGrid::ComputeScalarsOff |
( |
|
) |
[virtual] |
|
|
|
Set/Get the computation of scalars. |
| virtual void vtkContourGrid::SetUseScalarTree |
( |
int |
|
) |
[virtual] |
|
|
|
Enable the use of a scalar tree to accelerate contour extraction. |
| virtual int vtkContourGrid::GetUseScalarTree |
( |
|
) |
[virtual] |
|
|
|
Enable the use of a scalar tree to accelerate contour extraction. |
| virtual void vtkContourGrid::UseScalarTreeOn |
( |
|
) |
[virtual] |
|
|
|
Enable the use of a scalar tree to accelerate contour extraction. |
| virtual void vtkContourGrid::UseScalarTreeOff |
( |
|
) |
[virtual] |
|
|
|
Enable the use of a scalar tree to accelerate contour extraction. |
|
|
Set / get a spatial locator for merging points. By default, an instance of vtkMergePoints is used. |
|
|
Set / get a spatial locator for merging points. By default, an instance of vtkMergePoints is used. |
| void vtkContourGrid::CreateDefaultLocator |
( |
|
) |
|
|
|
|
Create default locator. Used to create one when none is specified. The locator is used to merge coincident points. |
|
|
This is called by the superclass. This is the method you should override.
Reimplemented from vtkPolyDataAlgorithm. |
| virtual int vtkContourGrid::FillInputPortInformation |
( |
int |
port, |
|
|
vtkInformation * |
info |
|
) |
[protected, virtual] |
|
|
|
Fill the input port information objects for this algorithm. This is invoked by the first call to GetInputPortInformation for each port so subclasses can specify what they can handle.
Reimplemented from vtkPolyDataAlgorithm. |
Member Data Documentation
The documentation for this class was generated from the following file:
Generated on Mon Jan 21 23:38:35 2008 for VTK by
1.4.3-20050530