Interface for Triangulation classes. More...

#include <Triangulation.h>

Inheritance diagram for Triangulation:

Public Types
enum	forcedCrossBehaviour { SnappingType_VERTICE, DELETE_FIRST, INSERT_VERTICE }
	Enumeration describing the behaviour, if two forced lines cross. More...

Public Member Functions
virtual	~Triangulation ()
virtual void	addLine (Line3D *line, bool breakline)=0
	Adds a line (e.g.
virtual int	addPoint (Point3D *p)=0
	Adds a point to the triangulation.
virtual bool	calcNormal (double x, double y, Vector3D *result)=0
	Calculates the normal at a point on the surface and assigns it to 'result'.
virtual void	performConsistencyTest ()=0
	Performs a consistency check, remove this later.
virtual bool	calcPoint (double x, double y, Point3D *result)=0
	Calculates x-, y and z-value of the point on the surface and assigns it to 'result'.
virtual Point3D *	getPoint (unsigned int i) const =0
	Returns a pointer to the point with number i.
virtual bool	getTriangle (double x, double y, Point3D p1, int n1, Point3D p2, int n2, Point3D p3, int n3)=0
	Finds out, in which triangle the point with coordinates x and y is and assigns the numbers of the vertices to 'n1', 'n2' and 'n3' and the vertices to 'p1', 'p2' and 'p3'.
virtual bool	getTriangle (double x, double y, Point3D p1, Point3D p2, Point3D *p3)=0
	Finds out, in which triangle the point with coordinates x and y is and assigns the points at the vertices to 'p1', 'p2' and 'p3.
virtual int	getOppositePoint (int p1, int p2)=0
	Returns the number of the point opposite to the triangle points p1, p2 (which have to be on a halfedge)
virtual double	getXMax () const =0
	Returns the largest x-coordinate value of the bounding box.
virtual double	getXMin () const =0
	Returns the smallest x-coordinate value of the bounding box.
virtual double	getYMax () const =0
	Returns the largest y-coordinate value of the bounding box.
virtual double	getYMin () const =0
	Returns the smallest x-coordinate value of the bounding box.
virtual int	getNumberOfPoints () const =0
	Returns the number of points.
virtual QList< int > *	getSurroundingTriangles (int pointno)=0
	Returns a pointer to a value list with the information of the triangles surrounding (counterclockwise) a point.
virtual QList< int > *	getPointsAroundEdge (double x, double y)=0
	Returns a value list with the numbers of the four points, which would be affected by an edge swap.
virtual void	setForcedCrossBehaviour (Triangulation::forcedCrossBehaviour b)=0
	draws the points, edges and the forced lines
virtual void	setEdgeColor (int r, int g, int b)=0
	Sets the color of the normal edges.
virtual void	setForcedEdgeColor (int r, int g, int b)=0
	Sets the color of the forced edges.
virtual void	setBreakEdgeColor (int r, int g, int b)=0
	Sets the color of the breaklines.
virtual void	setTriangleInterpolator (TriangleInterpolator *interpolator)=0
	Sets an interpolator object.
virtual void	eliminateHorizontalTriangles ()=0
	Eliminates the horizontal triangles by swapping.
virtual void	ruppertRefinement ()=0
	Adds points to make the triangles better shaped (algorithm of ruppert)
virtual bool	pointInside (double x, double y)=0
	Returns true, if the point with coordinates x and y is inside the convex hull and false otherwise.
virtual bool	swapEdge (double x, double y)=0
	Reads the content of a taff-file.
virtual bool	saveAsShapefile (const QString &fileName) const =0
	Saves the triangulation as a (line) shapefile.

Detailed Description

Interface for Triangulation classes.

Definition at line 28 of file Triangulation.h.

Member Enumeration Documentation

enum Triangulation::forcedCrossBehaviour

Enumeration describing the behaviour, if two forced lines cross.

SnappingType_VERTICE means, that the second inserted forced line is snapped to the closest vertice of the first inserted forced line. DELETE_FIRST means, that the status of the first inserted forced line is reset to that of a normal edge (so that the second inserted forced line remain and the first not

Enumerator:

SnappingType_VERTICE
DELETE_FIRST
INSERT_VERTICE

Definition at line 32 of file Triangulation.h.

Constructor & Destructor Documentation

Triangulation::~Triangulation ( )

inlinevirtual

Definition at line 96 of file Triangulation.h.

Member Function Documentation

virtual void Triangulation::addLine	(	Line3D *	line,
		bool	breakline
	)

pure virtual

Adds a line (e.g.

a break-, structure- or an isoline) to the triangulation. The class takes ownership of the line object and its points

Implemented in DualEdgeTriangulation, and TriDecorator.

Referenced by QgsTINInterpolator::insertData().

virtual int Triangulation::addPoint ( Point3D * p )

pure virtual

Adds a point to the triangulation.

Implemented in DualEdgeTriangulation, NormVecDecorator, and TriDecorator.

Referenced by QgsTINInterpolator::insertData().

virtual bool Triangulation::calcNormal	(	double	x,
		double	y,
		Vector3D *	result
	)

pure virtual

Calculates the normal at a point on the surface and assigns it to 'result'.

Returns true in case of success and flase in case of failure

Implemented in DualEdgeTriangulation, NormVecDecorator, and TriDecorator.

virtual bool Triangulation::calcPoint	(	double	x,
		double	y,
		Point3D *	result
	)

pure virtual

Calculates x-, y and z-value of the point on the surface and assigns it to 'result'.

Returns true in case of success and flase in case of failure

Implemented in DualEdgeTriangulation, NormVecDecorator, and TriDecorator.

virtual void Triangulation::eliminateHorizontalTriangles ( )

pure virtual

Eliminates the horizontal triangles by swapping.

Implemented in DualEdgeTriangulation, TriDecorator, and NormVecDecorator.

virtual int Triangulation::getNumberOfPoints ( ) const

pure virtual

Returns the number of points.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual int Triangulation::getOppositePoint	(	int	p1,
		int	p2
	)

pure virtual

Returns the number of the point opposite to the triangle points p1, p2 (which have to be on a halfedge)

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual Point3D* Triangulation::getPoint ( unsigned int i ) const

pure virtual

Returns a pointer to the point with number i.

Any virtual points must have the number -1

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual QList<int>* Triangulation::getPointsAroundEdge	(	double	x,
		double	y
	)

pure virtual

Returns a value list with the numbers of the four points, which would be affected by an edge swap.

This function is e.g. needed by NormVecDecorator to know the points, for which the normals have to be recalculated. The list has to be deleted by the code which calls this method

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual QList<int>* Triangulation::getSurroundingTriangles ( int pointno )

pure virtual

Returns a pointer to a value list with the information of the triangles surrounding (counterclockwise) a point.

Four integer values describe a triangle, the first three are the number of the half edges of the triangle and the fourth is -10, if the third (and most counterclockwise) edge is a breakline, and -20 otherwise. The value list has to be deleted by the code which called the method. Any virtual point needs to have the number -1

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual bool Triangulation::getTriangle	(	double	x,
		double	y,
		Point3D *	p1,
		int *	n1,
		Point3D *	p2,
		int *	n2,
		Point3D *	p3,
		int *	n3
	)

pure virtual

Finds out, in which triangle the point with coordinates x and y is and assigns the numbers of the vertices to 'n1', 'n2' and 'n3' and the vertices to 'p1', 'p2' and 'p3'.

Note: not available in python binding

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual bool Triangulation::getTriangle	(	double	x,
		double	y,
		Point3D *	p1,
		Point3D *	p2,
		Point3D *	p3
	)

pure virtual

Finds out, in which triangle the point with coordinates x and y is and assigns the points at the vertices to 'p1', 'p2' and 'p3.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual double Triangulation::getXMax ( ) const

pure virtual

Returns the largest x-coordinate value of the bounding box.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual double Triangulation::getXMin ( ) const

pure virtual

Returns the smallest x-coordinate value of the bounding box.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual double Triangulation::getYMax ( ) const

pure virtual

Returns the largest y-coordinate value of the bounding box.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual double Triangulation::getYMin ( ) const

pure virtual

Returns the smallest x-coordinate value of the bounding box.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual void Triangulation::performConsistencyTest ( )

pure virtual

Performs a consistency check, remove this later.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual bool Triangulation::pointInside	(	double	x,
		double	y
	)

pure virtual

Returns true, if the point with coordinates x and y is inside the convex hull and false otherwise.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual void Triangulation::ruppertRefinement ( )

pure virtual

Adds points to make the triangles better shaped (algorithm of ruppert)

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual bool Triangulation::saveAsShapefile ( const QString & fileName ) const

pure virtual

Saves the triangulation as a (line) shapefile.

Returns: true in case of success

Implemented in DualEdgeTriangulation, and NormVecDecorator.

virtual void Triangulation::setBreakEdgeColor	(	int	r,
		int	g,
		int	b
	)

pure virtual

Sets the color of the breaklines.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual void Triangulation::setEdgeColor	(	int	r,
		int	g,
		int	b
	)

pure virtual

Sets the color of the normal edges.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual void Triangulation::setForcedCrossBehaviour ( Triangulation::forcedCrossBehaviour b )

pure virtual

draws the points, edges and the forced lines

Sets the behaviour of the triangulation in case of crossing forced lines

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual void Triangulation::setForcedEdgeColor	(	int	r,
		int	g,
		int	b
	)

pure virtual

Sets the color of the forced edges.

Implemented in DualEdgeTriangulation, and TriDecorator.

virtual void Triangulation::setTriangleInterpolator ( TriangleInterpolator * interpolator )

pure virtual

Sets an interpolator object.

Implemented in DualEdgeTriangulation, NormVecDecorator, and TriDecorator.

virtual bool Triangulation::swapEdge	(	double	x,
		double	y
	)

pure virtual

Reads the content of a taff-file.

Saves the content to a taff file Swaps the edge which is closest to the point with x and y coordinates (if this is possible)

Implemented in DualEdgeTriangulation, NormVecDecorator, and TriDecorator.

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

/tmp/buildd/qgis-2.0.1/src/analysis/interpolation/Triangulation.h

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation