Decorator class which adds the functionality of estimating normals at the data points. More...

#include <NormVecDecorator.h>

Inheritance diagram for NormVecDecorator:

Public Types
enum	pointState { NORMAL, BREAKLINE, ENDPOINT }
	Enumeration for the state of a point. More...

Public Member Functions
	NormVecDecorator ()
	NormVecDecorator (Triangulation *tin)
virtual	~NormVecDecorator ()
int	addPoint (Point3D *p)
	Adds a point to the triangulation.
bool	calcNormal (double x, double y, Vector3D *result)
	Calculates the normal at a point on the surface and assigns it to 'result'.
bool	calcNormalForPoint (double x, double y, int point, Vector3D *result)
	Calculates the normal of a triangle-point for the point with coordinates x and y.
bool	calcPoint (double x, double y, Point3D *result)
	Calculates x-, y and z-value of the point on the surface and assigns it to 'result'.
virtual void	eliminateHorizontalTriangles ()
	Eliminates the horizontal triangles by swapping or by insertion of new points.
bool	estimateFirstDerivative (int pointno)
	Estimates the first derivative a point.
bool	estimateFirstDerivatives (QProgressDialog *d=0)
	This method adds the functionality of estimating normals at the data points.
Vector3D *	getNormal (int n) const
	Returns a pointer to the normal vector for the point with the number n.
bool	getTriangle (double x, double y, Point3D p1, Vector3D v1, Point3D p2, Vector3D v2, Point3D p3, Vector3D v3)
	Finds out, in which triangle a point with coordinates x and y is and assigns the triangle points to p1, p2, p3 and the estimated normals to v1, v2, v3.
bool	getTriangle (double x, double y, Point3D p1, int ptn1, Vector3D v1, pointState state1, Point3D p2, int ptn2, Vector3D v2, pointState state2, Point3D p3, int ptn3, Vector3D v3, pointState state3)
	This function behaves similar to the one above.
pointState	getState (int pointno) const
	Returns the state of the point with the number 'pointno'.
void	setTriangleInterpolator (TriangleInterpolator *inter)
	Sets an interpolator.
virtual bool	swapEdge (double x, double y)
	Swaps the edge which is closest to the point with x and y coordinates (if this is possible) and forces recalculation of the concerned normals (if alreadyestimated is true)
virtual bool	saveAsShapefile (const QString &fileName) const
	Saves the triangulation as a (line) shapefile.
Public Member Functions inherited from TriDecorator
	TriDecorator ()
	TriDecorator (Triangulation *t)
virtual	~TriDecorator ()
virtual void	addLine (Line3D *line, bool breakline)
	Adds a line (e.g.
virtual void	addTriangulation (Triangulation *t)
	Adds an association to a triangulation.
virtual void	performConsistencyTest ()
	Performs a consistency check, remove this later.
virtual Point3D *	getPoint (unsigned int i) const
	Returns a pointer to the point with number i.
virtual int	getNumberOfPoints () const
	Returns the number of points.
bool	getTriangle (double x, double y, Point3D p1, int n1, Point3D p2, int n2, Point3D p3, int n3)
bool	getTriangle (double x, double y, Point3D p1, Point3D p2, Point3D *p3)
	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)
	Returns the number of the point opposite to the triangle points p1, p2 (which have to be on a halfedge)
virtual QList< int > *	getSurroundingTriangles (int pointno)
	Returns a pointer to a value list with the information of the triangles surrounding (counterclockwise) a point.
virtual double	getXMax () const
	Returns the largest x-coordinate value of the bounding box.
virtual double	getXMin () const
	Returns the smallest x-coordinate value of the bounding box.
virtual double	getYMax () const
	Returns the largest y-coordinate value of the bounding box.
virtual double	getYMin () const
	Returns the smallest x-coordinate value of the bounding box.
virtual void	setForcedCrossBehaviour (Triangulation::forcedCrossBehaviour b)
	draws the points, edges and the forced lines
virtual void	setEdgeColor (int r, int g, int b)
	Sets the color of the normal edges.
virtual void	setForcedEdgeColor (int r, int g, int b)
	Sets the color of the forced edges.
virtual void	setBreakEdgeColor (int r, int g, int b)
	Sets the color of the breaklines.
virtual void	ruppertRefinement ()
	Adds points to make the triangles better shaped (algorithm of ruppert)
virtual bool	pointInside (double x, double y)
	Returns true, if the point with coordinates x and y is inside the convex hull and false otherwise.
virtual QList< int > *	getPointsAroundEdge (double x, double y)
	Returns a value list with the numbers of the four points, which would be affected by an edge swap.
Public Member Functions inherited from Triangulation
virtual	~Triangulation ()

Protected Member Functions
void	setState (int pointno, pointState s)
	Sets the state (BREAKLINE, NORMAL, ENDPOINT) of a point.

Protected Attributes
bool	alreadyestimated
	Is true, if the normals already have been estimated.
TriangleInterpolator *	mInterpolator
	Association with an interpolator object.
QVector< Vector3D * > *	mNormVec
	Vector that stores the normals for the points.
QVector< pointState > *	mPointState
	Vector who stores, it a point is not on a breakline, if it is a normal point of the breakline or if it is an endpoint of a breakline.
Protected Attributes inherited from TriDecorator
Triangulation *	mTIN
	Association with a Triangulation object.

Static Protected Attributes
static const unsigned int	mDefaultStorageForNormals = 100000

Detailed Description

Decorator class which adds the functionality of estimating normals at the data points.

Member Enumeration Documentation

enum NormVecDecorator::pointState

Enumeration for the state of a point.

NORMAL means, that the point is not on a breakline, BREAKLINE means that the point is on a breakline (but not an endpoint of it) and ENDPOINT means, that it is an endpoint of a breakline

Enumerator:

NORMAL
BREAKLINE
ENDPOINT

Constructor & Destructor Documentation

NormVecDecorator::NormVecDecorator ( )

inline

NormVecDecorator::NormVecDecorator ( Triangulation * tin )

inline

virtual NormVecDecorator::~NormVecDecorator ( )

virtual

Member Function Documentation

int NormVecDecorator::addPoint ( Point3D * p )

virtual

Adds a point to the triangulation.

Reimplemented from TriDecorator.

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

virtual

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

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

Reimplemented from TriDecorator.

bool NormVecDecorator::calcNormalForPoint	(	double	x,
		double	y,
		int	point,
		Vector3D *	result
	)

Calculates the normal of a triangle-point for the point with coordinates x and y.

This is needed, if a point is on a break line and there is no unique normal stored in 'mNormVec'. Returns false, it something went wrong and true otherwise

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

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

Reimplemented from TriDecorator.

virtual void NormVecDecorator::eliminateHorizontalTriangles ( )

virtual

Eliminates the horizontal triangles by swapping or by insertion of new points.

If alreadyestimated is true, a re-estimation of the normals will be done

Reimplemented from TriDecorator.

bool NormVecDecorator::estimateFirstDerivative ( int pointno )

Estimates the first derivative a point.

Return true in case of succes and false otherwise

bool NormVecDecorator::estimateFirstDerivatives ( QProgressDialog * d = 0 )

This method adds the functionality of estimating normals at the data points.

Return true in the case of success and false otherwise

Vector3D * NormVecDecorator::getNormal ( int n ) const

inline

Returns a pointer to the normal vector for the point with the number n.

pointState NormVecDecorator::getState ( int pointno ) const

Returns the state of the point with the number 'pointno'.

bool NormVecDecorator::getTriangle	(	double	x,
		double	y,
		Point3D *	p1,
		Vector3D *	v1,
		Point3D *	p2,
		Vector3D *	v2,
		Point3D *	p3,
		Vector3D *	v3
	)

Finds out, in which triangle a point with coordinates x and y is and assigns the triangle points to p1, p2, p3 and the estimated normals to v1, v2, v3.

The vectors are normaly taken from 'mNormVec', exept if p1, p2 or p3 is a point on a breakline. In this case, the normal is calculated on-the-fly. Returns false, if something went wrong and true otherwise

bool NormVecDecorator::getTriangle	(	double	x,
		double	y,
		Point3D *	p1,
		int *	ptn1,
		Vector3D *	v1,
		pointState *	state1,
		Point3D *	p2,
		int *	ptn2,
		Vector3D *	v2,
		pointState *	state2,
		Point3D *	p3,
		int *	ptn3,
		Vector3D *	v3,
		pointState *	state3
	)

This function behaves similar to the one above.

Additionally, the numbers of the points are returned (ptn1, ptn2, ptn3) as well as the pointStates of the triangle points (state1, state2, state3)

Note: not available in python bindings

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

virtual

Saves the triangulation as a (line) shapefile.

Returns: true in case of success

Implements Triangulation.

void NormVecDecorator::setState	(	int	pointno,
		pointState	s
	)

protected

Sets the state (BREAKLINE, NORMAL, ENDPOINT) of a point.

void NormVecDecorator::setTriangleInterpolator ( TriangleInterpolator * inter )

inlinevirtual

Sets an interpolator.

Reimplemented from TriDecorator.

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

virtual

Swaps the edge which is closest to the point with x and y coordinates (if this is possible) and forces recalculation of the concerned normals (if alreadyestimated is true)

Reimplemented from TriDecorator.

Member Data Documentation

bool NormVecDecorator::alreadyestimated

protected

Is true, if the normals already have been estimated.

const unsigned int NormVecDecorator::mDefaultStorageForNormals = 100000

staticprotected

TriangleInterpolator* NormVecDecorator::mInterpolator

protected

Association with an interpolator object.

QVector<Vector3D*>* NormVecDecorator::mNormVec

protected

Vector that stores the normals for the points.

If 'estimateFirstDerivatives()' was called and there is a null pointer, this means, that the triangle point is on a breakline

QVector<pointState>* NormVecDecorator::mPointState

protected

Vector who stores, it a point is not on a breakline, if it is a normal point of the breakline or if it is an endpoint of a breakline.

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

/tmp/buildd/qgis-2.6.0+wheezy1/src/analysis/interpolation/NormVecDecorator.h

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation