FreeMat: vtkHyperOctreeContourFilter

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vtkHyperOctreeContourFilter

Section: Visualization Toolkit Graphics Classes

# Usage

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().

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

      obj = vtkHyperOctreeContourFilter

# Methods

The class vtkHyperOctreeContourFilter 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 vtkHyperOctreeContourFilter class.

- `string = obj.GetClassName ()`
- `int = obj.IsA (string name)`
- `vtkHyperOctreeContourFilter = obj.NewInstance ()`
- `vtkHyperOctreeContourFilter = obj.SafeDownCast (vtkObject o)`
- `obj.SetValue (int i, double value)` - Get the ith contour value.
- `double = obj.GetValue (int i)` - Get a pointer to an array of contour values. There will be GetNumberOfContours() values in the list.
- `obj.GetValues (double contourValues)` - 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.
- `obj.SetNumberOfContours (int number)` - Get the number of contours in the list of contour values.
- `int = obj.GetNumberOfContours ()` - Generate numContours equally spaced contour values between specified range. Contour values will include min/max range values.
- `obj.GenerateValues (int numContours, double range[2])` - Generate numContours equally spaced contour values between specified range. Contour values will include min/max range values.
- `obj.GenerateValues (int numContours, double rangeStart, double rangeEnd)` - Modified GetMTime Because we delegate to vtkContourValues
- `long = obj.GetMTime ()` - Modified GetMTime Because we delegate to vtkContourValues
- `obj.SetLocator (vtkIncrementalPointLocator locator)` - Set / get a spatial locator for merging points. By default, an instance of vtkMergePoints is used.
- `vtkIncrementalPointLocator = obj.GetLocator ()` - Set / get a spatial locator for merging points. By default, an instance of vtkMergePoints is used.
- `obj.CreateDefaultLocator ()` - Create default locator. Used to create one when none is specified. The locator is used to merge coincident points.