Main Page Class Hierarchy Alphabetical List Compound List File List Compound Members File Members Related Pages
vtkContourFilter Class Reference
generate isosurfaces/isolines from scalar values.
More...
#include <vtkContourFilter.h>
Inheritance diagram for vtkContourFilter:
[legend]Collaboration diagram for vtkContourFilter:
[legend]List of all members.
Detailed Description
generate isosurfaces/isolines from scalar values.
-
Date:
-
2000/12/10 20:08:32
-
Revision:
-
1.56
vtkContourFilter is a filter that takes as input any dataset 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.
-
See also:
-
vtkMarchingContourFilter vtkKitwareContourFilter vtkMarchingCubes vtkSliceCubes vtkDividingCubes vtkMarchingSquares vtkImageMarchingCubes
-
Examples:
-
vtkContourFilter (examples)
Definition at line 89 of file vtkContourFilter.h.
Constructor & Destructor Documentation
| vtkContourFilter::vtkContourFilter |
( |
|
) |
[protected] |
|
| vtkContourFilter::~vtkContourFilter |
( |
|
) |
[protected] |
|
| vtkContourFilter::vtkContourFilter |
( |
const vtkContourFilter & |
|
) |
[inline, protected] |
|
Member Function Documentation
| virtual const char* vtkContourFilter::GetClassName |
( |
|
) |
[virtual] |
|
| int vtkContourFilter::IsTypeOf |
( |
const char * |
type |
) |
[static] |
|
| virtual int vtkContourFilter::IsA |
( |
const char * |
type |
) |
[virtual] |
|
| vtkContourFilter* vtkContourFilter::SafeDownCast |
( |
vtkObject * |
o |
) |
[static] |
|
| void vtkContourFilter::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 vtkSource. |
| vtkContourFilter* vtkContourFilter::New |
( |
|
) |
[static] |
|
| void vtkContourFilter::SetValue |
( |
int |
i, |
|
|
float |
value |
|
) |
[inline] |
|
| float vtkContourFilter::GetValue |
( |
int |
i |
) |
[inline] |
|
| float * vtkContourFilter::GetValues |
( |
|
) |
[inline] |
|
| void vtkContourFilter::GetValues |
( |
float * |
contourValues |
) |
[inline] |
|
|
|
Fill a supplied list with contour values. There will be GetNumberOfContours() values in the list. Make sure you allocate enough memory to hold the list.
Definition at line 190 of file vtkContourFilter.h. |
| void vtkContourFilter::SetNumberOfContours |
( |
int |
number |
) |
[inline] |
|
|
|
Set the number of contours to place into the list. You only really need to use this method to reduce list size. The method SetValue() will automatically increase list size as needed.
Definition at line 196 of file vtkContourFilter.h. |
| int vtkContourFilter::GetNumberOfContours |
( |
|
) |
[inline] |
|
|
|
Get the number of contours in the list of contour values.
Definition at line 200 of file vtkContourFilter.h. |
| void vtkContourFilter::GenerateValues |
( |
int |
numContours, |
|
|
float |
range[2] |
|
) |
[inline] |
|
|
|
Generate numContours equally spaced contour values between specified range. Contour values will include min/max range values.
Definition at line 205 of file vtkContourFilter.h. |
| void vtkContourFilter::GenerateValues |
( |
int |
numContours, |
|
|
float |
rangeStart, |
|
|
float |
rangeEnd |
|
) |
[inline] |
|
|
|
Generate numContours equally spaced contour values between specified range. Contour values will include min/max range values.
Definition at line 210 of file vtkContourFilter.h. |
| unsigned long vtkContourFilter::GetMTime |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::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 vtkContourFilter::GetComputeNormals |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::ComputeNormalsOn |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::ComputeNormalsOff |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::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 vtkContourFilter::GetComputeGradients |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::ComputeGradientsOn |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::ComputeGradientsOff |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::SetComputeScalars |
( |
int |
|
) |
[virtual] |
|
|
|
Set/Get the computation of scalars. |
| virtual int vtkContourFilter::GetComputeScalars |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::ComputeScalarsOn |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::ComputeScalarsOff |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::SetUseScalarTree |
( |
int |
|
) |
[virtual] |
|
|
|
Enable the use of a scalar tree to accelerate contour extraction. |
| virtual int vtkContourFilter::GetUseScalarTree |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::UseScalarTreeOn |
( |
|
) |
[virtual] |
|
| virtual void vtkContourFilter::UseScalarTreeOff |
( |
|
) |
[virtual] |
|
|
|
Set / get a spatial locator for merging points. By default, an instance of vtkMergePoints is used. |
| void vtkContourFilter::CreateDefaultLocator |
( |
void |
|
) |
|
|
|
|
Create default locator. Used to create one when none is specified. The locator is used to merge coincident points. |
| void vtkContourFilter::operator= |
( |
const vtkContourFilter & |
|
) |
[inline, protected] |
|
| void vtkContourFilter::Execute |
( |
|
) |
[protected, virtual] |
|
Member Data Documentation
int vtkContourFilter::ComputeNormals [protected]
|
|
int vtkContourFilter::ComputeGradients [protected]
|
|
int vtkContourFilter::ComputeScalars [protected]
|
|
int vtkContourFilter::UseScalarTree [protected]
|
|
The documentation for this class was generated from the following file:
Generated on Wed Nov 21 12:47:02 2001 for VTK by
1.2.11.1 written by Dimitri van Heesch,
© 1997-2001