vpImagePoint.h

/****************************************************************************
 *
 * $Id: vpImagePoint.h 4649 2014-02-07 14:57:11Z fspindle $
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2014 by INRIA. All rights reserved.
 * 
 * This software is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * ("GPL") version 2 as published by the Free Software Foundation.
 * See the file LICENSE.txt at the root directory of this source
 * distribution for additional information about the GNU GPL.
 *
 * For using ViSP with software that can not be combined with the GNU
 * GPL, please contact INRIA about acquiring a ViSP Professional 
 * Edition License.
 *
 * See http://www.irisa.fr/lagadic/visp/visp.html for more information.
 * 
 * This software was developed at:
 * INRIA Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 * http://www.irisa.fr/lagadic
 *
 * If you have questions regarding the use of this file, please contact
 * INRIA at visp@inria.fr
 * 
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *
 * Description:
 * 2D point useful for image processing
 *
 * Authors:
 * Nicolas Melchior
 * Fabien Spindler
 *
 *****************************************************************************/

#ifndef vpImagePoint_H
#define vpImagePoint_H

#include <visp/vpConfig.h>
#include <visp/vpMath.h>

#include <ostream>
#include <cmath>    // std::fabs
#include <limits>   // numeric_limits

class vpHomography;
class vpRect;

class VISP_EXPORT vpImagePoint
{
 public:
  inline vpImagePoint() : i(0), j(0) {}
  inline vpImagePoint(double ii, double jj) : i(ii), j(jj) {}
  inline vpImagePoint(const vpImagePoint &ip) : i(ip.i), j(ip.j) {}
  inline virtual ~vpImagePoint() { ; }

  inline const vpImagePoint& operator=(const vpImagePoint &ip) {
    this->i = ip.i;
    this->j = ip.j;
    return *this;
  }
   vpImagePoint& operator+=(const vpImagePoint &ip);

  inline vpImagePoint& operator-=(const vpImagePoint &ip) {
    this->i -= ip.i;
    this->j -= ip.j;
    return *this;
  }
  vpImagePoint& operator/=(const double scale);
  inline vpImagePoint& operator*=(const double scale) {
    this->i *= scale;
    this->j *= scale;
    return *this;
  }

  inline void set_i(const double ii) {  this->i = ii ; }

  inline void set_j(const double jj) {  this->j = jj ; }

  inline void set_ij(const double ii, const double jj) {
    this->i = ii ;
    this->j = jj ;
  }

  inline double get_i()  const { return i ; }

  inline double get_j()  const { return j ; }

  inline void set_u(const double u) {  j = u ; }

  inline void set_v(const double v) {  i = v ; }

  inline void set_uv(const double u, const double v) {
    this->i = v ;
    this->j = u ;
  }

  inline double get_u()  const { return j ; }

  inline double get_v()  const { return i; }

  static double distance (const vpImagePoint &iP1, const vpImagePoint &iP2) {
    return(sqrt(vpMath::sqr(iP1.get_i()-iP2.get_i())+vpMath::sqr(iP1.get_j()-iP2.get_j())));}
    
  static double sqrDistance (const vpImagePoint &iP1, const vpImagePoint &iP2) {
    return(vpMath::sqr(iP1.get_i()-iP2.get_i())+vpMath::sqr(iP1.get_j()-iP2.get_j()));}
  
  
  bool inRectangle( const vpRect &rect ) const;

  friend VISP_EXPORT bool operator==( const vpImagePoint &ip1, const vpImagePoint &ip2 );
  friend VISP_EXPORT bool operator!=( const vpImagePoint &ip1, const vpImagePoint &ip2 );
  friend VISP_EXPORT vpImagePoint operator+=( const vpImagePoint &ip1, const vpImagePoint &ip2 );
  friend VISP_EXPORT vpImagePoint operator+( const vpImagePoint &ip1, const vpImagePoint &ip2 );
  friend VISP_EXPORT vpImagePoint operator+( const vpImagePoint &ip1, const int offset );
  friend VISP_EXPORT vpImagePoint operator+( const vpImagePoint &ip1, const double offset );
  friend VISP_EXPORT vpImagePoint operator-( const vpImagePoint &ip1, const vpImagePoint &ip2 );
  friend VISP_EXPORT vpImagePoint operator-( const vpImagePoint &ip1, const int offset );
  friend VISP_EXPORT vpImagePoint operator-( const vpImagePoint &ip1, const double offset );
  friend VISP_EXPORT vpImagePoint operator*( const vpImagePoint &ip1, const double scale );
  friend VISP_EXPORT vpImagePoint operator/( const vpImagePoint &ip1, const double scale );
  friend VISP_EXPORT std::ostream& operator<< (std::ostream &os, const vpImagePoint& ip);

  vpImagePoint projection(const vpHomography& aHb);

 private:
  double i,j;
};

#endif