QGIS API Documentation
2.99.0Master (9caa722)

Decorator class which adds the functionality of estimating normals at the data points. More...
#include <NormVecDecorator.h>
Public Types  
enum  PointState { Normal, BreakLine, EndPoint } 
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 end point of it) and EndPoint means, that it is an endpoint of a breakline. More...  
Public Types inherited from Triangulation  
enum  ForcedCrossBehavior { SnappingTypeVertex, DeleteFirst, InsertVertex } 
Enumeration describing the behavior, if two forced lines cross. More...  
Public Member Functions  
NormVecDecorator ()  
NormVecDecorator (Triangulation *tin)  
virtual  ~NormVecDecorator () 
int  addPoint (QgsPoint *p) override 
Adds a point to the triangulation. More...  
bool  calcNormal (double x, double y, Vector3D *result) override 
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. More...  
bool  calcNormalForPoint (double x, double y, int point, Vector3D *result) 
Calculates the normal of a trianglepoint 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. More...  
bool  calcPoint (double x, double y, QgsPoint *result) override 
Calculates x, y and zvalue of the point on the surface and assigns it to 'result'. Returns true in case of success and flase in case of failure. More...  
virtual void  eliminateHorizontalTriangles () override 
Eliminates the horizontal triangles by swapping or by insertion of new points. If alreadyestimated is true, a reestimation of the normals will be done. More...  
bool  estimateFirstDerivative (int pointno) 
Estimates the first derivative a point. Return true in case of succes and false otherwise. More...  
bool  estimateFirstDerivatives (QgsFeedback *feedback=nullptr) 
This method adds the functionality of estimating normals at the data points. Return true in the case of success and false otherwise. More...  
Vector3D *  getNormal (int n) const 
Returns a pointer to the normal vector for the point with the number n. More...  
PointState  getState (int pointno) const 
Returns the state of the point with the number 'pointno'. More...  
bool  getTriangle (double x, double y, QgsPoint *p1, Vector3D *v1, QgsPoint *p2, Vector3D *v2, QgsPoint *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 normally taken from 'mNormVec', except if p1, p2 or p3 is a point on a breakline. In this case, the normal is calculated onthefly. Returns false, if something went wrong and true otherwise. More...  
bool  getTriangle (double x, double y, QgsPoint *p1, int *ptn1, Vector3D *v1, PointState *state1, QgsPoint *p2, int *ptn2, Vector3D *v2, PointState *state2, QgsPoint *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) More...  
virtual bool  saveTriangulation (QgsFeatureSink *sink, QgsFeedback *feedback=nullptr) const override 
Saves the triangulation features to a feature sink. More...  
void  setTriangleInterpolator (TriangleInterpolator *inter) override 
Sets an interpolator. More...  
virtual bool  swapEdge (double x, double y) override 
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) More...  
Public Member Functions inherited from TriDecorator  
TriDecorator ()  
TriDecorator (Triangulation *t)  
virtual  ~TriDecorator () 
virtual void  addLine (Line3D *line, bool breakline) override 
Adds a line (e.g. More...  
virtual void  addTriangulation (Triangulation *t) 
Adds an association to a triangulation. More...  
virtual int  getNumberOfPoints () const override 
Returns the number of points. More...  
virtual int  getOppositePoint (int p1, int p2) override 
Returns the number of the point opposite to the triangle points p1, p2 (which have to be on a halfedge) More...  
virtual QgsPoint *  getPoint (unsigned int i) const override 
Returns a pointer to the point with number i. Any virtual points must have the number 1. More...  
virtual QList< int > *  getPointsAroundEdge (double x, double y) override 
Returns a value list with the numbers of the four points, which would be affected by an edge swap. More...  
virtual QList< int > *  getSurroundingTriangles (int pointno) override 
Returns a pointer to a value list with the information of the triangles surrounding (counterclockwise) a point. More...  
bool  getTriangle (double x, double y, QgsPoint *p1, int *n1, QgsPoint *p2, int *n2, QgsPoint *p3, int *n3) override 
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'. More...  
bool  getTriangle (double x, double y, QgsPoint *p1, QgsPoint *p2, QgsPoint *p3) override 
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. More...  
virtual double  getXMax () const override 
Returns the largest xcoordinate value of the bounding box. More...  
virtual double  getXMin () const override 
Returns the smallest xcoordinate value of the bounding box. More...  
virtual double  getYMax () const override 
Returns the largest ycoordinate value of the bounding box. More...  
virtual double  getYMin () const override 
Returns the smallest xcoordinate value of the bounding box. More...  
virtual void  performConsistencyTest () override 
Performs a consistency check, remove this later. More...  
virtual bool  pointInside (double x, double y) override 
Returns true, if the point with coordinates x and y is inside the convex hull and false otherwise. More...  
virtual void  ruppertRefinement () override 
Adds points to make the triangles better shaped (algorithm of ruppert) More...  
virtual void  setBreakEdgeColor (int r, int g, int b) override 
Sets the color of the breaklines. More...  
virtual void  setEdgeColor (int r, int g, int b) override 
Sets the color of the normal edges. More...  
virtual void  setForcedCrossBehavior (Triangulation::ForcedCrossBehavior b) override 
Draws the points, edges and the forced lines. More...  
virtual void  setForcedEdgeColor (int r, int g, int b) override 
Sets the color of the forced edges. More...  
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. More...  
Protected Attributes  
bool  alreadyestimated 
Is true, if the normals already have been estimated. More...  
TriangleInterpolator *  mInterpolator = nullptr 
Association with an interpolator object. More...  
QVector< Vector3D * > *  mNormVec 
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. More...  
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. More...  
Protected Attributes inherited from TriDecorator  
Triangulation *  mTIN = nullptr 
Association with a Triangulation object. More...  
Static Protected Attributes  
static const unsigned int  DEFAULT_STORAGE_FOR_NORMALS = 100000 
Additional Inherited Members  
Static Public Member Functions inherited from Triangulation  
static QgsFields  triangulationFields () 
Returns the fields output by features when calling saveTriangulation(). More...  
Decorator class which adds the functionality of estimating normals at the data points.
Definition at line 36 of file NormVecDecorator.h.
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 end point of it) and EndPoint means, that it is an endpoint of a breakline.
Enumerator  

Normal  
BreakLine  
EndPoint 
Definition at line 40 of file NormVecDecorator.h.

inline 
Definition at line 89 of file NormVecDecorator.h.

inline 
Definition at line 94 of file NormVecDecorator.h.

virtual 
Definition at line 23 of file NormVecDecorator.cpp.

overridevirtual 
Adds a point to the triangulation.
Reimplemented from TriDecorator.
Definition at line 43 of file NormVecDecorator.cpp.

overridevirtual 
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.
Definition at line 84 of file NormVecDecorator.cpp.
bool NormVecDecorator::calcNormalForPoint  (  double  x, 
double  y,  
int  point,  
Vector3D *  result  
) 
Calculates the normal of a trianglepoint 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.
Definition at line 104 of file NormVecDecorator.cpp.

overridevirtual 
Calculates x, y and zvalue 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.
Definition at line 235 of file NormVecDecorator.cpp.

overridevirtual 
Eliminates the horizontal triangles by swapping or by insertion of new points. If alreadyestimated is true, a reestimation of the normals will be done.
Reimplemented from TriDecorator.
Definition at line 530 of file NormVecDecorator.cpp.
bool NormVecDecorator::estimateFirstDerivative  (  int  pointno  ) 
Estimates the first derivative a point. Return true in case of succes and false otherwise.
Definition at line 365 of file NormVecDecorator.cpp.
bool NormVecDecorator::estimateFirstDerivatives  (  QgsFeedback *  feedback = nullptr  ) 
This method adds the functionality of estimating normals at the data points. Return true in the case of success and false otherwise.
Definition at line 515 of file NormVecDecorator.cpp.

inline 
Returns a pointer to the normal vector for the point with the number n.
Definition at line 104 of file NormVecDecorator.h.
NormVecDecorator::PointState NormVecDecorator::getState  (  int  pointno  )  const 
Returns the state of the point with the number 'pointno'.
Definition at line 312 of file NormVecDecorator.cpp.
bool NormVecDecorator::getTriangle  (  double  x, 
double  y,  
QgsPoint *  p1,  
Vector3D *  v1,  
QgsPoint *  p2,  
Vector3D *  v2,  
QgsPoint *  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 normally taken from 'mNormVec', except if p1, p2 or p3 is a point on a breakline. In this case, the normal is calculated onthefly. Returns false, if something went wrong and true otherwise.
Definition at line 256 of file NormVecDecorator.cpp.
bool NormVecDecorator::getTriangle  (  double  x, 
double  y,  
QgsPoint *  p1,  
int *  ptn1,  
Vector3D *  v1,  
PointState *  state1,  
QgsPoint *  p2,  
int *  ptn2,  
Vector3D *  v2,  
PointState *  state2,  
QgsPoint *  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)
Definition at line 326 of file NormVecDecorator.cpp.

overridevirtual 
Saves the triangulation features to a feature sink.
The sink must be setup to accept LineString features, with fields matching those returned by triangulationFields().
Implements Triangulation.
Definition at line 594 of file NormVecDecorator.cpp.

protected 
Sets the state (BreakLine, Normal, EndPoint) of a point.
Definition at line 550 of file NormVecDecorator.cpp.

inlineoverridevirtual 
Sets an interpolator.
Reimplemented from TriDecorator.
Definition at line 99 of file NormVecDecorator.h.

overridevirtual 
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.
Definition at line 562 of file NormVecDecorator.cpp.

protected 
Is true, if the normals already have been estimated.
Definition at line 75 of file NormVecDecorator.h.

staticprotected 
Definition at line 76 of file NormVecDecorator.h.

protected 
Association with an interpolator object.
Definition at line 78 of file NormVecDecorator.h.

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.
Definition at line 80 of file NormVecDecorator.h.

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.
Definition at line 82 of file NormVecDecorator.h.