Objects that compute geometry-based error during cell tessellation. More...
#include <vtkGeometricErrorMetric.h>
Detailed Description
Objects that compute geometry-based error during cell tessellation.
It is a concrete error metric, based on a geometric criterium: the variation of the edge from a straight line.
Definition at line 38 of file vtkGeometricErrorMetric.h.
Member Typedef Documentation
Standard VTK type and error macros.
Reimplemented from vtkGenericSubdivisionErrorMetric.
Definition at line 47 of file vtkGeometricErrorMetric.h.
Constructor & Destructor Documentation
| vtkGeometricErrorMetric::vtkGeometricErrorMetric | ( | ) | [protected] |
| virtual vtkGeometricErrorMetric::~vtkGeometricErrorMetric | ( | ) | [protected, virtual] |
Member Function Documentation
| static vtkGeometricErrorMetric* vtkGeometricErrorMetric::New | ( | ) | [static] |
Construct the error metric with a default squared absolute geometric accuracy equal to 1.
Reimplemented from vtkObject.
| static int vtkGeometricErrorMetric::IsTypeOf | ( | const char * | type | ) | [static] |
Standard VTK type and error macros.
Reimplemented from vtkGenericSubdivisionErrorMetric.
| virtual int vtkGeometricErrorMetric::IsA | ( | const char * | type | ) | [virtual] |
Standard VTK type and error macros.
Reimplemented from vtkGenericSubdivisionErrorMetric.
| static vtkGeometricErrorMetric* vtkGeometricErrorMetric::SafeDownCast | ( | vtkObjectBase * | o | ) | [static] |
Standard VTK type and error macros.
Reimplemented from vtkGenericSubdivisionErrorMetric.
| virtual vtkObjectBase* vtkGeometricErrorMetric::NewInstanceInternal | ( | ) | const [protected, virtual] |
Standard VTK type and error macros.
Reimplemented from vtkGenericSubdivisionErrorMetric.
Standard VTK type and error macros.
Reimplemented from vtkGenericSubdivisionErrorMetric.
| void vtkGeometricErrorMetric::PrintSelf | ( | ostream & | os, |
| vtkIndent | indent | ||
| ) | [virtual] |
Standard VTK type and error macros.
Reimplemented from vtkGenericSubdivisionErrorMetric.
| virtual double vtkGeometricErrorMetric::GetAbsoluteGeometricTolerance | ( | ) | [virtual] |
Return the squared absolute geometric accuracy. See SetAbsoluteGeometricTolerance() for details.
- Postcondition:
- positive_result: result>0
| void vtkGeometricErrorMetric::SetAbsoluteGeometricTolerance | ( | double | value | ) |
Set the geometric accuracy with a squared absolute value. This is the geometric object-based accuracy. Subdivision will be required if the square distance between the real point and the straight line passing through the vertices of the edge is greater than `value'. For instance 0.01 will give better result than 0.1.
- Precondition:
- positive_value: value>0
| void vtkGeometricErrorMetric::SetRelativeGeometricTolerance | ( | double | value, |
| vtkGenericDataSet * | ds | ||
| ) |
Set the geometric accuracy with a value relative to the length of the bounding box of the dataset. Internally compute the absolute tolerance. For instance 0.01 will give better result than 0.1.
- Precondition:
- valid_range_value: value>0 && value<1
- ds_exists: ds!=0
| int vtkGeometricErrorMetric::RequiresEdgeSubdivision | ( | double * | leftPoint, |
| double * | midPoint, | ||
| double * | rightPoint, | ||
| double | alpha | ||
| ) | [virtual] |
Does the edge need to be subdivided according to the distance between the line passing through its endpoints and the mid point? 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
Implements vtkGenericSubdivisionErrorMetric.
| double vtkGeometricErrorMetric::GetError | ( | double * | leftPoint, |
| double * | midPoint, | ||
| double * | rightPoint, | ||
| double | alpha | ||
| ) | [virtual] |
Return the error at the mid-point. It will return an error relative to the bounding box size if GetRelative() is true, a square absolute error otherwise. 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
Implements vtkGenericSubdivisionErrorMetric.
Return the type of output of GetError()
| double vtkGeometricErrorMetric::Distance2LinePoint | ( | double | x[3], |
| double | y[3], | ||
| double | z[3] | ||
| ) | [protected] |
Square distance between a straight line (defined by points x and y) and a point z. Property: if x and y are equal, the line is a point and the result is the square distance between points x and z.
Member Data Documentation
Definition at line 123 of file vtkGeometricErrorMetric.h.
double vtkGeometricErrorMetric::SmallestSize [protected] |
Definition at line 124 of file vtkGeometricErrorMetric.h.
int vtkGeometricErrorMetric::Relative [protected] |
Definition at line 125 of file vtkGeometricErrorMetric.h.
The documentation for this class was generated from the following file:
- dox/Common/DataModel/vtkGeometricErrorMetric.h
