Documentation for vtkCastToConcrete

vtkCastToConcrete - works around type-checking limitations

Description:

vtkCastToConcrete is a filter that works around type-checking limitations in the filter classes. Some filters generate abstract types on output, and cannot be connected to the input of filters requiring a concrete input type. For example, vtkElevationFilter generates vtkDataSet for output, and cannot be connected to vtkDecimate, because vtkDecimate requires vtkPolyData as input. This is true even though (in this example) the input to vtkElevationFilter is of type vtkPolyData, and you know the output of vtkElevationFilter is the same type as its input. vtkCastToConcrete performs run-time checking to insure that output type is of the right type. An error message will result if you try to cast an input type improperly. Otherwise, the filter performs the appropriate cast and returns the data.

Caveats:

You must specify the input before you can get the output. Otherwise an error results.

See Also:

vtkDataSetToDataSetFilter vtkPointSetToPointSetFilter

Methods:

	void vtkCastToConcrete ()
	void vtkCastToConcrete ()
	static vtkCastToConcrete *New ()
	const char *GetClassName ()
	void Update ()
	vtkDataSet *GetOutput ()
	vtkPolyData *GetPolyDataOutput ()
	vtkStructuredPoints *GetStructuredPointsOutput ()
	vtkStructuredGrid *GetStructuredGridOutput ()
	vtkUnstructuredGrid *GetUnstructuredGridOutput ()
	vtkRectilinearGrid *GetRectilinearGridOutput ()
	void Execute ()

Detailed Method Descriptions:

Special method just passes Update through pipeline.

void Update ()

Get the output of this filter. If output is NULL then input hasn't been set which is necessary for abstract objects.

vtkDataSet *GetOutput ()

Get the output of this filter as type vtkPolyData. Performs run-time checking on type. Returns NULL if wrong type.

vtkPolyData *GetPolyDataOutput ()

Get the output of this filter as type vtkStructuredPoints. Performs run-time checking on type. Returns NULL if wrong type.

vtkStructuredPoints *GetStructuredPointsOutput ()

Get the output of this filter as type vtkStructuredGrid. Performs run-time checking on type. Returns NULL if wrong type.

vtkStructuredGrid *GetStructuredGridOutput ()

Get the output of this filter as type vtkUnstructuredGrid. Performs run-time checking on type. Returns NULL if wrong type.

	vtkUnstructuredGrid *GetUnstructuredGridOutput ()
	vtkRectilinearGrid *GetRectilinearGridOutput ()