Section: Visualization Toolkit Graphics Classes
Generally spatial search objects are used for collision detection and other geometric operations, but in this filter one or more levels of spatial searchers can be generated to form a geometric approximation to the input data. This is a form of data simplification, generally used to accelerate the rendering process. Or, this filter can be used as a debugging/ visualization aid for spatial search objects. This filter can generate one or more output vtkPolyData corresponding to different levels in the spatial search tree. The output data is retrieved using the GetOutput(id) method, where id ranges from 0 (root level) to Level. Note that the output for level "id" is not computed unless a GetOutput(id) method is issued. Thus, if you desire three levels of output (say 2,4,7), you would have to invoke GetOutput(2), GetOutput(4), and GetOutput(7). (Also note that the Level ivar is computed automatically depending on the size and nature of the input data.) There is also another GetOutput() method that takes no parameters. This method returns the leafs of the spatial search tree, which may be at different levels.
To create an instance of class vtkSpatialRepresentationFilter, simply invoke its constructor as follows
obj = vtkSpatialRepresentationFilter
obj
is an instance of the vtkSpatialRepresentationFilter class.
string = obj.GetClassName ()
int = obj.IsA (string name)
vtkSpatialRepresentationFilter = obj.NewInstance ()
vtkSpatialRepresentationFilter = obj.SafeDownCast (vtkObject o)
obj.SetSpatialRepresentation (vtkLocator )
- Set/Get the locator that will be used to generate the representation.
vtkLocator = obj.GetSpatialRepresentation ()
- Set/Get the locator that will be used to generate the representation.
int = obj.GetLevel ()
- Get the maximum number of outputs actually available.
vtkPolyData = obj.GetOutput (int level)
- A special form of the GetOutput() method that returns multiple outputs.
vtkPolyData = obj.GetOutput ()
- Output of terminal nodes/leaves.
obj.ResetOutput ()
- Reset requested output levels
obj.SetInput (vtkDataSet input)
- Set / get the input data or filter.
vtkDataSet = obj.GetInput ()
- Set / get the input data or filter.