vtkGenericSubdivisionErrorMetric Class Reference

#include <vtkGenericSubdivisionErrorMetric.h>

Inheritance diagram for vtkGenericSubdivisionErrorMetric:

[legend]Collaboration diagram for vtkGenericSubdivisionErrorMetric:

[legend]List of all members.

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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 46 of file vtkGenericSubdivisionErrorMetric.h.

typedef vtkObject	Superclass
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
static int	IsTypeOf (const char *type)
static vtkGenericSubdivisionErrorMetric *	SafeDownCast (vtkObject *o)
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

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Member Typedef Documentation

typedef vtkObject vtkGenericSubdivisionErrorMetric::Superclass

Standard VTK type and error macros. Reimplemented from vtkObject. Reimplemented in vtkAttributesErrorMetric, vtkGeometricErrorMetric, vtkSmoothErrorMetric, and vtkViewDependentErrorMetric. Definition at line 51 of file vtkGenericSubdivisionErrorMetric.h.

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Constructor & Destructor Documentation

vtkGenericSubdivisionErrorMetric::vtkGenericSubdivisionErrorMetric (   )  [protected]

vtkGenericSubdivisionErrorMetric::~vtkGenericSubdivisionErrorMetric (   )  [protected]

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Member Function Documentation

virtual const char* vtkGenericSubdivisionErrorMetric::GetClassName (   )  [virtual]

Standard VTK type and error macros. Reimplemented from vtkObject. Reimplemented in vtkAttributesErrorMetric, vtkGeometricErrorMetric, vtkSmoothErrorMetric, and vtkViewDependentErrorMetric.

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

Standard VTK type and error macros. Reimplemented from vtkObject. Reimplemented in vtkAttributesErrorMetric, vtkGeometricErrorMetric, vtkSmoothErrorMetric, and vtkViewDependentErrorMetric.

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

Standard VTK type and error macros. Reimplemented from vtkObject. Reimplemented in vtkAttributesErrorMetric, vtkGeometricErrorMetric, vtkSmoothErrorMetric, and vtkViewDependentErrorMetric.

static vtkGenericSubdivisionErrorMetric* vtkGenericSubdivisionErrorMetric::SafeDownCast (  vtkObject *  o  )  [static]

Standard VTK type and error macros. Reimplemented from vtkObject. Reimplemented in vtkAttributesErrorMetric, vtkGeometricErrorMetric, vtkSmoothErrorMetric, and vtkViewDependentErrorMetric.

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

Standard VTK type and error macros. Reimplemented from vtkObject. Reimplemented in vtkAttributesErrorMetric, vtkGeometricErrorMetric, vtkSmoothErrorMetric, and vtkViewDependentErrorMetric.

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 vtkAttributesErrorMetric, vtkGeometricErrorMetric, vtkSmoothErrorMetric, and vtkViewDependentErrorMetric.

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 Postcondition: positive_result: result>=0 Implemented in vtkAttributesErrorMetric, vtkGeometricErrorMetric, vtkSmoothErrorMetric, and vtkViewDependentErrorMetric.

void vtkGenericSubdivisionErrorMetric::SetGenericCell (  vtkGenericAdaptorCell *  cell  )

The cell that the edge belongs to.

virtual vtkGenericAdaptorCell* vtkGenericSubdivisionErrorMetric::GetGenericCell (   )  [virtual]

The cell that the edge belongs to.

void vtkGenericSubdivisionErrorMetric::SetDataSet (  vtkGenericDataSet *  ds  )

Set/Get the dataset to be tessellated.

virtual vtkGenericDataSet* vtkGenericSubdivisionErrorMetric::GetDataSet (   )  [virtual]

Set/Get the dataset to be tessellated.

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Member Data Documentation

vtkGenericAdaptorCell* vtkGenericSubdivisionErrorMetric::GenericCell [protected]

Definition at line 103 of file vtkGenericSubdivisionErrorMetric.h.

vtkGenericDataSet* vtkGenericSubdivisionErrorMetric::DataSet [protected]

Definition at line 104 of file vtkGenericSubdivisionErrorMetric.h.

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The documentation for this class was generated from the following file:

• dox/Filtering/vtkGenericSubdivisionErrorMetric.h

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