Objects that compute error during cell tessellation. More...

#include <vtkGenericSubdivisionErrorMetric.h>

Inheritance diagram for vtkGenericSubdivisionErrorMetric:

Collaboration diagram for vtkGenericSubdivisionErrorMetric:

Public Member Functions

virtual int	RequiresEdgeSubdivision (double leftPoint, double midPoint, double *rightPoint, double alpha)=0


virtual double	GetError (double leftPoint, double midPoint, double *rightPoint, double alpha)=0


void	SetGenericCell (vtkGenericAdaptorCell *cell)

virtual vtkGenericAdaptorCell *	GetGenericCell ()


void	SetDataSet (vtkGenericDataSet *ds)

virtual vtkGenericDataSet *	GetDataSet ()

Protected Member Functions
	vtkGenericSubdivisionErrorMetric ()

	~vtkGenericSubdivisionErrorMetric ()

Protected Attributes
vtkGenericAdaptorCell *	GenericCell

vtkGenericDataSet *	DataSet

typedef vtkObject	Superclass

static int	IsTypeOf (const char *type)

static vtkGenericSubdivisionErrorMetric *	SafeDownCast (vtkObjectBase *o)

virtual int	IsA (const char *type)

vtkGenericSubdivisionErrorMetric *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent)

virtual vtkObjectBase *	NewInstanceInternal () const

Detailed Description

Objects that compute error during cell tessellation.

Objects of that class answer the following question during the cell subdivision: "does the edge need to be subdivided?" through RequiresEdgeSubdivision(). The answer depends on the criterium actually used in the subclass of this abstract class: a geometric-based error metric (variation of edge from a straight line), an attribute-based error metric (variation of the active attribute/component value from a linear ramp) , a view-depend error metric, ... Cell subdivision is performed in the context of the adaptor framework: higher-order, or complex cells, are automatically tessellated into simplices so that they can be processed with conventional visualization algorithms.

See Also: vtkGenericCellTessellator

Definition at line 47 of file vtkGenericSubdivisionErrorMetric.h.

Member Typedef Documentation

typedef vtkObject vtkGenericSubdivisionErrorMetric::Superclass

Standard VTK type and error macros.

Definition at line 52 of file vtkGenericSubdivisionErrorMetric.h.

Constructor & Destructor Documentation

vtkGenericSubdivisionErrorMetric::vtkGenericSubdivisionErrorMetric ( )

protected

vtkGenericSubdivisionErrorMetric::~vtkGenericSubdivisionErrorMetric ( )

protected

Member Function Documentation

static int vtkGenericSubdivisionErrorMetric::IsTypeOf ( const char * type )

static

Standard VTK type and error macros.

virtual int vtkGenericSubdivisionErrorMetric::IsA ( const char * type )

virtual

Standard VTK type and error macros.

Reimplemented in vtkSmoothErrorMetric, and vtkGeometricErrorMetric.

static vtkGenericSubdivisionErrorMetric* vtkGenericSubdivisionErrorMetric::SafeDownCast ( vtkObjectBase * o )

static

Standard VTK type and error macros.

virtual vtkObjectBase* vtkGenericSubdivisionErrorMetric::NewInstanceInternal ( ) const

protectedvirtual

Standard VTK type and error macros.

Reimplemented in vtkSmoothErrorMetric, and vtkGeometricErrorMetric.

vtkGenericSubdivisionErrorMetric* vtkGenericSubdivisionErrorMetric::NewInstance ( ) const

Standard VTK type and error macros.

void vtkGenericSubdivisionErrorMetric::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

Standard VTK type and error macros.

virtual int vtkGenericSubdivisionErrorMetric::RequiresEdgeSubdivision	(	double *	leftPoint,
		double *	midPoint,
		double *	rightPoint,
		double	alpha
	)

pure virtual

Does the edge need to be subdivided according to the implemented computation? The edge is defined by its `leftPoint' and its `rightPoint'. `leftPoint', `midPoint' and `rightPoint' have to be initialized before calling RequiresEdgeSubdivision(). Their format is global coordinates, parametric coordinates and point centered attributes: xyx rst abc de... `alpha' is the normalized abscissa of the midpoint along the edge. (close to 0 means close to the left point, close to 1 means close to the right point)

Precondition: leftPoint_exists: leftPoint!=0; midPoint_exists: midPoint!=0; rightPoint_exists: rightPoint!=0; clamped_alpha: alpha>0 && alpha<1; valid_size: sizeof(leftPoint)=sizeof(midPoint)=sizeof(rightPoint) =GetAttributeCollection()->GetNumberOfPointCenteredComponents()+6

Implemented in vtkGeometricErrorMetric, and vtkSmoothErrorMetric.

virtual double vtkGenericSubdivisionErrorMetric::GetError	(	double *	leftPoint,
		double *	midPoint,
		double *	rightPoint,
		double	alpha
	)

pure virtual

Return the error at the mid-point. The type of error depends on the state of the concrete error metric. For instance, it can return an absolute or relative error metric. See RequiresEdgeSubdivision() for a description of the arguments.

Precondition: leftPoint_exists: leftPoint!=0; midPoint_exists: midPoint!=0; rightPoint_exists: rightPoint!=0; clamped_alpha: alpha>0 && alpha<1; valid_size: sizeof(leftPoint)=sizeof(midPoint)=sizeof(rightPoint) =GetAttributeCollection()->GetNumberOfPointCenteredComponents()+6