VTK
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generate isosurfaces/isolines from scalar values More...
#include <vtkMarchingContourFilter.h>
Inherits vtkPolyDataAlgorithm.
Public Types | |
typedef vtkPolyDataAlgorithm | Superclass |
Public Member Functions | |
virtual int | IsA (const char *type) |
vtkMarchingContourFilter * | NewInstance () const |
void | PrintSelf (ostream &os, vtkIndent indent) |
unsigned long | GetMTime () |
void | CreateDefaultLocator () |
void | SetValue (int i, double value) |
double | GetValue (int i) |
double * | GetValues () |
void | GetValues (double *contourValues) |
void | SetNumberOfContours (int number) |
int | GetNumberOfContours () |
void | GenerateValues (int numContours, double range[2]) |
void | GenerateValues (int numContours, double rangeStart, double rangeEnd) |
virtual void | SetComputeNormals (int) |
virtual int | GetComputeNormals () |
virtual void | ComputeNormalsOn () |
virtual void | ComputeNormalsOff () |
virtual void | SetComputeGradients (int) |
virtual int | GetComputeGradients () |
virtual void | ComputeGradientsOn () |
virtual void | ComputeGradientsOff () |
virtual void | SetComputeScalars (int) |
virtual int | GetComputeScalars () |
virtual void | ComputeScalarsOn () |
virtual void | ComputeScalarsOff () |
virtual void | SetUseScalarTree (int) |
virtual int | GetUseScalarTree () |
virtual void | UseScalarTreeOn () |
virtual void | UseScalarTreeOff () |
void | SetLocator (vtkIncrementalPointLocator *locator) |
virtual vtkIncrementalPointLocator * | GetLocator () |
Static Public Member Functions | |
static int | IsTypeOf (const char *type) |
static vtkMarchingContourFilter * | SafeDownCast (vtkObjectBase *o) |
static vtkMarchingContourFilter * | New () |
Protected Member Functions | |
virtual vtkObjectBase * | NewInstanceInternal () const |
vtkMarchingContourFilter () | |
~vtkMarchingContourFilter () | |
virtual int | RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *) |
virtual int | FillInputPortInformation (int port, vtkInformation *info) |
void | StructuredPointsContour (int dim, vtkDataSet *input, vtkPolyData *output) |
void | ImageContour (int dim, vtkDataSet *input, vtkPolyData *output) |
void | DataSetContour (vtkDataSet *input, vtkPolyData *output) |
Protected Attributes | |
vtkContourValues * | ContourValues |
int | ComputeNormals |
int | ComputeGradients |
int | ComputeScalars |
vtkIncrementalPointLocator * | Locator |
int | UseScalarTree |
vtkScalarTree * | ScalarTree |
generate isosurfaces/isolines from scalar values
vtkMarchingContourFilter 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.
This filter will identify special dataset types (e.g., structured points) and use the appropriate specialized filter to process the data. For examples, if the input dataset type is a volume, this filter will create an internal vtkMarchingCubes instance and use it. This gives much better performance.
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().
Definition at line 67 of file vtkMarchingContourFilter.h.
typedef vtkPolyDataAlgorithm vtkMarchingContourFilter::Superclass |
Definition at line 70 of file vtkMarchingContourFilter.h.
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vtkMarchingContourFilter* vtkMarchingContourFilter::NewInstance | ( | ) | const |
void vtkMarchingContourFilter::PrintSelf | ( | ostream & | os, |
vtkIndent | indent | ||
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Construct object with initial range (0,1) and single contour value of 0.0.
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Methods to set / get contour values.
Set a particular contour value at contour number i. The index i ranges between 0<=i<NumberOfContours.
Definition at line 168 of file vtkMarchingContourFilter.h.
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Get the ith contour value.
Definition at line 176 of file vtkMarchingContourFilter.h.
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Get a pointer to an array of contour values. There will be GetNumberOfContours() values in the list.
Definition at line 185 of file vtkMarchingContourFilter.h.
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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 195 of file vtkMarchingContourFilter.h.
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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 205 of file vtkMarchingContourFilter.h.
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Get the number of contours in the list of contour values.
Definition at line 213 of file vtkMarchingContourFilter.h.
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Generate numContours equally spaced contour values between specified range. Contour values will include min/max range values.
Definition at line 222 of file vtkMarchingContourFilter.h.
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Generate numContours equally spaced contour values between specified range. Contour values will include min/max range values.
Definition at line 232 of file vtkMarchingContourFilter.h.
unsigned long vtkMarchingContourFilter::GetMTime | ( | ) |
Modified GetMTime Because we delegate to vtkContourValues
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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Set/Get the computation of scalars.
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Set/Get the computation of scalars.
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Set/Get the computation of scalars.
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Set/Get the computation of scalars.
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Enable the use of a scalar tree to accelerate contour extraction.
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Enable the use of a scalar tree to accelerate contour extraction.
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Enable the use of a scalar tree to accelerate contour extraction.
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Enable the use of a scalar tree to accelerate contour extraction.
void vtkMarchingContourFilter::SetLocator | ( | vtkIncrementalPointLocator * | locator | ) |
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 vtkMarchingContourFilter::CreateDefaultLocator | ( | ) |
Create default locator. Used to create one when none is specified. The locator is used to merge coincident points.
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Definition at line 146 of file vtkMarchingContourFilter.h.
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Definition at line 147 of file vtkMarchingContourFilter.h.
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Definition at line 148 of file vtkMarchingContourFilter.h.
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Definition at line 149 of file vtkMarchingContourFilter.h.
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Definition at line 150 of file vtkMarchingContourFilter.h.
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Definition at line 151 of file vtkMarchingContourFilter.h.
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Definition at line 152 of file vtkMarchingContourFilter.h.