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Usage
vtkCleanPolyData is a filter that takes polygonal data as
input and generates polygonal data as output.
vtkCleanPolyData can merge duplicate points (within
specified tolerance and if enabled), eliminate points that
are not used, and if enabled, transform degenerate cells
into appropriate forms (for example, a triangle is converted
into a line if two points of triangle are merged).
Conversion of degenerate cells is controlled by the flags
ConvertLinesToPoints, ConvertPolysToLines,
ConvertStripsToPolys which act cumulatively such that a
degenerate strip may become a poly. The full set is Line
with 1 points -> Vert (if ConvertLinesToPoints) Poly with 2
points -> Line (if ConvertPolysToLines) Poly with 1 points -
> Vert (if ConvertPolysToLines &&
ConvertLinesToPoints) Strp with 3 points -> Poly (if
ConvertStripsToPolys) Strp with 2 points -> Line (if
ConvertStripsToPolys && ConvertPolysToLines) Strp
with 1 points -> Vert (if ConvertStripsToPolys &&
ConvertPolysToLines && ConvertLinesToPoints)
If tolerance is specified precisely=0.0, then
vtkCleanPolyData will use the vtkMergePoints object to merge
points (which is faster). Otherwise the slower
vtkIncrementalPointLocator is used. Before inserting points
into the point locator, this class calls a function
OperateOnPoint which can be used (in subclasses) to further
refine the cleaning process. See vtkQuantizePolyDataPoints.
Note that merging of points can be disabled. In this case, a
point locator will not be used, and points that are not used
by any cells will be eliminated, but never merged.
To create an instance of class vtkCleanPolyData, simply
invoke its constructor as follows
obj = vtkCleanPolyData
Methods
The class vtkCleanPolyData 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 vtkCleanPolyData class.
* string = obj.GetClassName ()
* int = obj.IsA (string name)
* vtkCleanPolyData = obj.NewInstance ()
* vtkCleanPolyData = obj.SafeDownCast (vtkObject o)
* obj.SetToleranceIsAbsolute (int ) - By default
ToleranceIsAbsolute is false and Tolerance is a fraction
of Bounding box diagonal, if true, AbsoluteTolerance is
used when adding points to locator (merging)
* obj.ToleranceIsAbsoluteOn () - By default
ToleranceIsAbsolute is false and Tolerance is a fraction
of Bounding box diagonal, if true, AbsoluteTolerance is
used when adding points to locator (merging)
* obj.ToleranceIsAbsoluteOff () - By default
ToleranceIsAbsolute is false and Tolerance is a fraction
of Bounding box diagonal, if true, AbsoluteTolerance is
used when adding points to locator (merging)
* int = obj.GetToleranceIsAbsolute () - By default
ToleranceIsAbsolute is false and Tolerance is a fraction
of Bounding box diagonal, if true, AbsoluteTolerance is
used when adding points to locator (merging)
* obj.SetTolerance (double ) - Specify tolerance in terms of
fraction of bounding box length.
* double = obj.GetToleranceMinValue () - Specify tolerance
in terms of fraction of bounding box length.
* double = obj.GetToleranceMaxValue () - Specify tolerance
in terms of fraction of bounding box length.
* double = obj.GetTolerance () - Specify tolerance in terms
of fraction of bounding box length.
* obj.SetAbsoluteTolerance (double ) - Specify tolerance in
absolute terms
* double = obj.GetAbsoluteToleranceMinValue () - Specify
tolerance in absolute terms
* double = obj.GetAbsoluteToleranceMaxValue () - Specify
tolerance in absolute terms
* double = obj.GetAbsoluteTolerance () - Specify tolerance
in absolute terms
* obj.SetConvertLinesToPoints (int ) - Turn on/off
conversion of degenerate lines to points
* obj.ConvertLinesToPointsOn () - Turn on/off conversion of
degenerate lines to points
* obj.ConvertLinesToPointsOff () - Turn on/off conversion of
degenerate lines to points
* int = obj.GetConvertLinesToPoints () - Turn on/off
conversion of degenerate lines to points
* obj.SetConvertPolysToLines (int ) - Turn on/off conversion
of degenerate polys to lines
* obj.ConvertPolysToLinesOn () - Turn on/off conversion of
degenerate polys to lines
* obj.ConvertPolysToLinesOff () - Turn on/off conversion of
degenerate polys to lines
* int = obj.GetConvertPolysToLines () - Turn on/off
conversion of degenerate polys to lines
* obj.SetConvertStripsToPolys (int ) - Turn on/off
conversion of degenerate strips to polys
* obj.ConvertStripsToPolysOn () - Turn on/off conversion of
degenerate strips to polys
* obj.ConvertStripsToPolysOff () - Turn on/off conversion of
degenerate strips to polys
* int = obj.GetConvertStripsToPolys () - Turn on/off
conversion of degenerate strips to polys
* obj.SetPointMerging (int ) - Set/Get a boolean value that
controls whether point merging is performed. If on, a
locator will be used, and points laying within the
appropriate tolerance may be merged. If off, points are
never merged. By default, merging is on.
* int = obj.GetPointMerging () - Set/Get a boolean value
that controls whether point merging is performed. If on, a
locator will be used, and points laying within the
appropriate tolerance may be merged. If off, points are
never merged. By default, merging is on.
* obj.PointMergingOn () - Set/Get a boolean value that
controls whether point merging is performed. If on, a
locator will be used, and points laying within the
appropriate tolerance may be merged. If off, points are
never merged. By default, merging is on.
* obj.PointMergingOff () - Set/Get a boolean value that
controls whether point merging is performed. If on, a
locator will be used, and points laying within the
appropriate tolerance may be merged. If off, points are
never merged. By default, merging is on.
* obj.SetLocator (vtkIncrementalPointLocator locator) - Set/
Get a spatial locator for speeding the search process. By
default an instance of vtkMergePoints is used.
* vtkIncrementalPointLocator = obj.GetLocator () - Set/Get a
spatial locator for speeding the search process. By
default an instance of vtkMergePoints is used.
* obj.CreateDefaultLocator (vtkPolyData input) - Create
default locator. Used to create one when none is
specified.
* obj.ReleaseLocator () - Get the MTime of this object also
considering the locator.
* long = obj.GetMTime () - Get the MTime of this object also
considering the locator.
* obj.OperateOnPoint (double in[3], double out[3]) - Perform
operation on a point
* obj.OperateOnBounds (double in[6], double out[6]) -
Perform operation on bounds
* obj.SetPieceInvariant (int )
* int = obj.GetPieceInvariant ()
* obj.PieceInvariantOn ()
* obj.PieceInvariantOff ()
* FreeMat_Documentation
* Visualization_Toolkit_Graphics_Classes
* Generated on Thu Jul 25 2013 17:18:31 for FreeMat by
doxygen_ 1.8.1.1
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