api/3.16/MathUtils_8h_source.html

/***************************************************************************

                          MathUtils.h  -  description

                             -------------------

    copyright            : (C) 2004 by Marco Hugentobler

    email                : [email protected]

 ***************************************************************************/


/***************************************************************************

 *                                                                         *

 *   This program is free software; you can redistribute it and/or modify  *

 *   it under the terms of the GNU General Public License as published by  *

 *   the Free Software Foundation; either version 2 of the License, or     *

 *   (at your option) any later version.                                   *

 *                                                                         *

 ***************************************************************************/


#ifndef MATHUTILS_H

#define MATHUTILS_H


#include <cmath>

#include "qgis_analysis.h"


class QgsPoint;

class Vector3D;


#define SIP_NO_FILE


namespace MathUtils

{

  bool ANALYSIS_EXPORT calcBarycentricCoordinates( double x, double y, QgsPoint *p1, QgsPoint *p2, QgsPoint *p3, QgsPoint *result );

  bool ANALYSIS_EXPORT BarycentricToXY( double u, double v, double w, QgsPoint *p1, QgsPoint *p2, QgsPoint *p3, QgsPoint *result );

  double ANALYSIS_EXPORT calcBernsteinPoly( int n, int i, double t );

  double ANALYSIS_EXPORT cFDerBernsteinPoly( int n, int i, double t );

  double ANALYSIS_EXPORT calcCubicHermitePoly( int n, int i, double t );

  double ANALYSIS_EXPORT cFDerCubicHermitePoly( int n, int i, double t );

  bool ANALYSIS_EXPORT circumcenter( QgsPoint *p1, QgsPoint *p2, QgsPoint *p3, QgsPoint *result );

  double ANALYSIS_EXPORT distPointFromLine( QgsPoint *thepoint, QgsPoint *p1, QgsPoint *p2 );

  int ANALYSIS_EXPORT faculty( int n );

  bool ANALYSIS_EXPORT inCircle( QgsPoint *testp, QgsPoint *p1, QgsPoint *p2, QgsPoint *p3 );

  bool ANALYSIS_EXPORT inDiametral( QgsPoint *p1, QgsPoint *p2, QgsPoint *point );

  double ANALYSIS_EXPORT leftOf( const QgsPoint &thepoint, const QgsPoint *p1, const QgsPoint *p2 );

  bool ANALYSIS_EXPORT lineIntersection( QgsPoint *p1, QgsPoint *p2, QgsPoint *p3, QgsPoint *p4 );

  bool ANALYSIS_EXPORT lineIntersection( QgsPoint *p1, QgsPoint *p2, QgsPoint *p3, QgsPoint *p4, QgsPoint *intersection_point );

  int ANALYSIS_EXPORT lower( int n, int i );

  double ANALYSIS_EXPORT triArea( QgsPoint *pa, QgsPoint *pb, QgsPoint *pc );

  bool ANALYSIS_EXPORT derVec( const Vector3D *v1, const Vector3D *v2, Vector3D *result, double x, double y );

  double ANALYSIS_EXPORT crossVec( QgsPoint *first, Vector3D *vec1, QgsPoint *second, Vector3D *vec2 );

  bool ANALYSIS_EXPORT normalLeft( Vector3D *v1, Vector3D *result, double length );

  bool ANALYSIS_EXPORT normalRight( Vector3D *v1, Vector3D *result, double length );

  void ANALYSIS_EXPORT normalFromPoints( QgsPoint *p1, QgsPoint *p2, QgsPoint *p3, Vector3D *vec );

  bool ANALYSIS_EXPORT pointInsideTriangle( double x, double y, QgsPoint *p1, QgsPoint *p2, QgsPoint *p3 );

  bool ANALYSIS_EXPORT normalMinDistance( Vector3D *tangent, Vector3D *target, Vector3D *result );

  double ANALYSIS_EXPORT planeTest( QgsPoint *test, QgsPoint *pt1, QgsPoint *pt2, QgsPoint *pt3 );

  double ANALYSIS_EXPORT angle( QgsPoint *p1, QgsPoint *p2, QgsPoint *p3, QgsPoint *p4 );

}


#endif