Quantum GIS API Documentation  1.7.4
src/core/qgspoint.h
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00001 /***************************************************************************
00002                           qgspoint.h  -  description
00003                              -------------------
00004     begin                : Sat Jun 22 2002
00005     copyright            : (C) 2002 by Gary E.Sherman
00006     email                : sherman at mrcc.com
00007  ***************************************************************************/
00008 
00009 /***************************************************************************
00010  *                                                                         *
00011  *   This program is free software; you can redistribute it and/or modify  *
00012  *   it under the terms of the GNU General Public License as published by  *
00013  *   the Free Software Foundation; either version 2 of the License, or     *
00014  *   (at your option) any later version.                                   *
00015  *                                                                         *
00016  ***************************************************************************/
00017 /* $Id$ */
00018 
00019 #ifndef QGSPOINT_H
00020 #define QGSPOINT_H
00021 
00022 #include <iostream>
00023 #include <QString>
00024 #include <QPoint>
00025 
00031 class CORE_EXPORT QgsVector
00032 {
00033     double m_x, m_y;
00034 
00035   public:
00036     QgsVector();
00037     QgsVector( double x, double y );
00038 
00039     QgsVector operator-( void ) const;
00040     QgsVector operator*( double scalar ) const;
00041     QgsVector operator/( double scalar ) const;
00042     double operator*( QgsVector v ) const;
00043     double length() const;
00044 
00045     double x() const;
00046     double y() const;
00047 
00048     // perpendicular vector (rotated 90 counter-clockwise)
00049     QgsVector perpVector() const;
00050 
00051     double angle( void ) const;
00052     double angle( QgsVector v ) const;
00053     QgsVector rotateBy( double rot ) const;
00054     QgsVector normal() const;
00055 
00056 };
00057 
00062 class CORE_EXPORT QgsPoint
00063 {
00064   public:
00066     QgsPoint()
00067     {}
00068 
00070     QgsPoint( const QgsPoint& p );
00071 
00076     QgsPoint( double x, double y )
00077         : m_x( x ), m_y( y )
00078     {}
00079 
00080     ~QgsPoint()
00081     {}
00082 
00086     void setX( double x )
00087     {
00088       m_x = x;
00089     }
00090 
00094     void setY( double y )
00095     {
00096       m_y = y;
00097     }
00098 
00100     void set( double x, double y )
00101     {
00102       m_x = x;
00103       m_y = y;
00104     }
00105 
00109     double x() const
00110     {
00111       return m_x;
00112     }
00113 
00117     double y() const
00118     {
00119       return m_y;
00120     }
00121 
00123     QString toString() const;
00124 
00126     QString toString( int thePrecision ) const;
00127 
00133     QString toDegreesMinutesSeconds( int thePrecision ) const;
00134 
00135 
00140     QString wellKnownText() const;
00141 
00143     double sqrDist( double x, double y ) const;
00144 
00146     double sqrDist( const QgsPoint& other ) const;
00147 
00150     double sqrDistToSegment( double x1, double y1, double x2, double y2, QgsPoint& minDistPoint ) const;
00151 
00154     double azimuth( const QgsPoint& other );
00155 
00157     bool operator==( const QgsPoint &other );
00158 
00160     bool operator!=( const QgsPoint &other ) const;
00161 
00163     QgsPoint & operator=( const QgsPoint &other );
00164 
00166     void multiply( const double& scalar );
00167 
00172     int onSegment( const QgsPoint& a, const QgsPoint& b ) const;
00173 
00174     QgsVector operator-( QgsPoint p ) const { return QgsVector( m_x - p.m_x, m_y - p.m_y ); }
00175     QgsPoint &operator+=( const QgsVector &v ) { *this = *this + v; return *this; }
00176     QgsPoint &operator-=( const QgsVector &v ) { *this = *this - v; return *this; }
00177     QgsPoint operator+( const QgsVector &v ) const { return QgsPoint( m_x + v.x(), m_y + v.y() ); }
00178     QgsPoint operator-( const QgsVector &v ) const { return QgsPoint( m_x - v.x(), m_y - v.y() ); }
00179 
00180   private:
00181 
00183     double m_x;
00184 
00186     double m_y;
00187 
00188 
00189 }; // class QgsPoint
00190 
00191 
00192 inline bool operator==( const QgsPoint &p1, const QgsPoint &p2 )
00193 {
00194   if (( p1.x() == p2.x() ) && ( p1.y() == p2.y() ) )
00195     { return true; }
00196   else
00197     { return false; }
00198 }
00199 
00200 inline std::ostream& operator << ( std::ostream& os, const QgsPoint &p )
00201 {
00202   // Use Local8Bit for printouts
00203   os << p.toString().toLocal8Bit().data();
00204   return os;
00205 }
00206 
00207 #endif //QGSPOINT_H
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