vpPlotGraph.cpp

/****************************************************************************
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2015 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://visp.inria.fr for more information.
 *
 * This software was developed at:
 * Inria Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 *
 * 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:
 * Define a graph for the vpPlot class.
 *
 * Authors:
 * Nicolas Melchior
 *
 *****************************************************************************/
#define FLUSH_ON_PLOT

#include <visp3/core/vpConfig.h>
#ifndef DOXYGEN_SHOULD_SKIP_THIS

#include <visp3/gui/vpPlotGraph.h>
#include <visp3/core/vpMath.h>
#include <visp3/core/vpMeterPixelConversion.h>
#include <visp3/core/vpPixelMeterConversion.h>
//#include <visp3/vision/vpPose.h>

#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayGTK.h>
#include <visp3/gui/vpDisplayD3D.h>

#include <cmath>    // std::fabs
#include <visp3/core/vpMath.h>
#include <limits>   // numeric_limits

#if defined(VISP_HAVE_DISPLAY)

int laFonctionSansNom (const double delta);
void getGrid3DPoint(const double pente, vpImagePoint &iPunit, vpImagePoint &ip1, vpImagePoint &ip2, vpImagePoint &ip3);


vpPlotGraph::vpPlotGraph()
  : xorg(0.), yorg(0.), zoomx(1.), zoomy(1.), xmax(10), ymax(10), xmin(0), ymin(-10),
    xdelt(1), ydelt(1), gridx(true), gridy(true), gridColor(), curveNbr(1), curveList(NULL),
    scaleInitialized(false), firstPoint(true), nbDivisionx(10), nbDivisiony(10), topLeft(),
    width(0), height(0), graphZone(), dTopLeft(), dWidth(0), dHeight(0), dGraphZone(),
    dTopLeft3D(), dGraphZone3D(), cam(), cMo(), cMf(), w_xval(0), w_xsize(0), w_yval(0), w_ysize(0),
    w_zval(0), w_zsize(0), ptXorg(0), ptYorg(0), ptZorg(0), zoomx_3D(1.), zoomy_3D(1.), zoomz_3D(1.),
    nbDivisionz(10), zorg(1.), zoomz(1.), zmax(10), zmin(-10), zdelt(1), old_iPr(), old_iPz(),
    blockedr(false), blockedz(false), blocked(false), epsi(5), epsj(6),
    dispUnit(false), dispTitle(false), dispLegend(false), gridThickness(1)
{
  gridColor.setColor(200,200,200);
  
  old_iPr = vpImagePoint(-1,-1);
  old_iPz = vpImagePoint(-1,-1);

  gridThickness = 1;
}

vpPlotGraph::~vpPlotGraph()
{
  if (curveList != NULL)
  {
    delete[] curveList;
    curveList = NULL;
  }
}

void
vpPlotGraph::initGraph (unsigned int nbCurve)
{
  curveList = new vpPlotCurve[nbCurve];
  curveNbr = nbCurve;
  
  vpColor colors[6] = {vpColor::blue,vpColor::green,vpColor::red,vpColor::cyan,vpColor::orange,vpColor::purple};
  
  for (unsigned int i = 0; i < curveNbr; i++)
  {
    (curveList+i)->color = colors[i%6]; 
    (curveList+i)->curveStyle = line;
    (curveList+i)->pointListx.clear();
    (curveList+i)->pointListy.clear();
    strcpy((curveList+i)->legend,"");
  }
}

void
vpPlotGraph::initSize (vpImagePoint top_left, unsigned int w, unsigned int h, unsigned int margei, unsigned int margej)
{
  this->topLeft = top_left;
  this->width = w;
  this->height = h;
  graphZone.setTopLeft(topLeft);
  graphZone.setWidth(width);
  graphZone.setHeight(height);
  
  this->dTopLeft = vpImagePoint(topLeft.get_i()+margei,topLeft.get_j()+margej);
  this->dWidth = width-margej-10;
  this->dHeight = height-2*margei;
  dGraphZone.setTopLeft(dTopLeft);
  dGraphZone.setWidth(dWidth+1);
  dGraphZone.setHeight(dHeight+1);
  
  this->dTopLeft3D = vpImagePoint(topLeft.get_i()+margei,topLeft.get_j()+10);
  dGraphZone3D.setTopLeft(dTopLeft3D);
  dGraphZone3D.setWidth(dWidth+1);
  dGraphZone3D.setHeight(dHeight+1);
  
  if (this->dWidth > this->dHeight)
  {
    w_ysize = 1.0;
    w_xsize = this->dWidth/this->dHeight;
    w_zsize = w_xsize;
    
    w_yval = w_ysize/2.0;
    w_xval = w_xsize/2.0;
    w_zval = w_zsize/2.0;
  }
  else if (this->dWidth == this->dHeight)
  {
    w_ysize = 1.0;
    w_xsize = 1.0;
    w_zsize = 1.0;
    
    w_yval = 0.5;
    w_xval = 0.5;
    w_zval = 0.5;
  }
  else if (this->dWidth < this->dHeight)
  {
    w_xsize = 1.0;
    w_ysize = this->dHeight/this->dWidth;
    w_zsize = w_ysize;
    
    w_yval = w_ysize/2.0;
    w_xval = w_xsize/2.0;
    w_zval = w_zsize/2.0;
  }
  
  cam.initPersProjWithoutDistortion(1000,1000,this->dWidth/2.0,this->dHeight/2.0);
  
  findPose();

  cMf.buildFrom(0,0,cMo[2][3],0,0,0);
}


void
vpPlotGraph::findPose()
{
  vpPoint point[4];
  point[0].setWorldCoordinates(-w_xval,-w_yval,-w_zval);
  point[1].setWorldCoordinates(w_xval,-w_yval,-w_zval);
  point[2].setWorldCoordinates(w_xval,w_yval,-w_zval);
  point[3].setWorldCoordinates(-w_xval,w_yval,-w_zval);
  
  vpImagePoint iP[4];
  iP[0].set_ij(0,0);
  iP[1].set_ij(0,dWidth-1);
  iP[2].set_ij(dHeight-1,dWidth-1);
  iP[3].set_ij(dHeight-1,0);

  double x=0, y=0;
#if 0
  // Modified by FS to remove dependency with visp_vision (pose) module
  vpPose pose;
  pose.clearPoint();

  for (unsigned int i=0 ; i < 4 ; i++)
  {
    vpPixelMeterConversion::convertPoint(cam, iP[i], x, y);
    point[i].set_x(x);
    point[i].set_y(y);
    pose.addPoint(point[i]);
  }
  
  pose.computePose(vpPose::LAGRANGE, cMo) ;
  pose.computePose(vpPose::VIRTUAL_VS, cMo);

#else
  // Instead of pose computation we use an approximation
  double Z = 0;
  for(unsigned int i=0; i< 4; i++) {
    vpPixelMeterConversion::convertPoint(cam, iP[i], x, y);
    Z = vpMath::maximum(Z, point[i].get_oX() / x);
    Z = vpMath::maximum(Z, point[i].get_oY() / y);
  }
  cMo[2][3] = Z;
#endif
}

void
vpPlotGraph::computeGraphParameters()
{
  zoomx = dWidth/(xmax-xmin);
  zoomy = dHeight/(ymax-ymin);
  xorg = dTopLeft.get_j() - (xmin*zoomx);
  yorg = dTopLeft.get_i() + (ymax*zoomy);
}

void 
vpPlotGraph::setCurveColor(const unsigned int curveNum, const vpColor color)
{
  (curveList+curveNum)->color = color;
}

void
vpPlotGraph::setTitle (const char *title_)
{
  if (strlen(title_) >= 256) {
    throw(vpException(vpException::memoryAllocationError,
                      "Not enough memory to intialize the title"));
  }

  strcpy(this->title, title_);
  dispTitle = true;
}

void
vpPlotGraph::setUnitX (const char *unit_x)
{
  if (strlen(unit_x) >= 256) {
    throw(vpException(vpException::memoryAllocationError,
                      "Not enough memory to intialize the unit along x axis"));
  }

  strcpy(this->unitx, unit_x);
  dispUnit = true;
}

void
vpPlotGraph::setUnitY (const char *unit_y)
{
  if (strlen(unit_y) >= 256) {
    throw(vpException(vpException::memoryAllocationError,
                      "Not enough memory to intialize the unit along y axis"));
  }

  strcpy(this->unity, unit_y);
  dispUnit = true;
}

void
vpPlotGraph::setUnitZ (const char *unit_z)
{
  if (strlen(unit_z) >= 256) {
    throw(vpException(vpException::memoryAllocationError,
                      "Not enough memory to intialize the unit along z axis"));
  }

  strcpy(this->unitz, unit_z);
  dispUnit = true;
}

void
vpPlotGraph::setLegend (const unsigned int curveNum, const char *legend)
{
  if (strlen(legend) >= 256) {
    throw(vpException(vpException::memoryAllocationError,
                      "Not enough memory to intialize the legend"));
  }

  strcpy((curveList+curveNum)->legend,legend);
  dispLegend = true;
}

void 
vpPlotGraph::setCurveThickness(const unsigned int curveNum, const unsigned int thickness)
{
  (curveList+curveNum)->thickness = thickness;
}

int
laFonctionSansNom (const double delta)
{
  double d = delta;
  int power = 0;
  if (d < 1)
  {
    while (d < 1)
    {
      d = d * 10;
      power++;
    }
    power--;
    return power;
  }
  
  if (d >= 10)
  {
    while (d > 10)
    {
      d = d / 10;
      power--;
    }
    power--;
    return power;
  }
  
  return 0;
}

void
vpPlotGraph::displayGrid (vpImage<unsigned char> &I)
{
  computeGraphParameters();
  
  xdelt = (xmax-xmin)/nbDivisionx;
  ydelt = (ymax-ymin)/nbDivisiony;
  
  double t;
  char valeur[20];
  int power;
  
  power = laFonctionSansNom(xdelt);
  for(t=xmin;t<=xmax;t=t+xdelt)
  {
    double x = xorg+(zoomx*t);
    if(gridy)
      vpDisplay::displayDotLine(I,vpImagePoint(dTopLeft.get_i(),x), vpImagePoint(dTopLeft.get_i()+dHeight,x), gridColor, gridThickness);
    else
      vpDisplay::displayDotLine(I,vpImagePoint(yorg,x), vpImagePoint(yorg-3,x), vpColor::black, gridThickness);
    
    if (t+xdelt <= xmax+1e-10)
    {
      double ttemp;
      if (power!=0)
        ttemp = t*pow(10.0,power); 
      else ttemp = t;
      sprintf(valeur, "%.2f", ttemp);
#if defined VISP_HAVE_X11
      vpDisplay::displayCharString(I,vpImagePoint(yorg + 3*epsi,x),valeur, vpColor::black);
#elif defined (VISP_HAVE_GDI) || defined (VISP_HAVE_OPENCV) || defined(VISP_HAVE_D3D9) || defined(VISP_HAVE_GTK)
      vpDisplay::displayCharString(I,vpImagePoint(yorg + epsi,x),valeur, vpColor::black);
#endif
    }
  }
  if (power != 0)
  {
    sprintf(valeur, "x10e%d", -power);
#if defined VISP_HAVE_X11
    vpDisplay::displayCharString(I,vpImagePoint(yorg+4*epsi,dTopLeft.get_j()+dWidth-6*epsj),valeur, vpColor::black);
#elif defined (VISP_HAVE_GDI) || defined (VISP_HAVE_OPENCV) || defined(VISP_HAVE_D3D9) || defined(VISP_HAVE_GTK)
    vpDisplay::displayCharString(I,vpImagePoint(yorg+4*epsi,dTopLeft.get_j()+dWidth-10*epsj),valeur, vpColor::black);
#endif
  }
  
  power = laFonctionSansNom(ydelt);
  for(t=ymin;t<=ymax;t=t+ydelt)
  {
    double y = yorg-(zoomy*t);
    if(gridx)
      vpDisplay::displayDotLine(I,vpImagePoint(y,dTopLeft.get_j()), vpImagePoint(y,dTopLeft.get_j()+dWidth), gridColor, gridThickness);
    else
      vpDisplay::displayDotLine(I,vpImagePoint(y,xorg), vpImagePoint(y,xorg+3), vpColor::black, gridThickness);
      
    double ttemp;
    if (power!=0)
      ttemp = t*pow(10.0,power); 
    else ttemp = t;
      
    sprintf(valeur, "%.2f", ttemp);
#if defined VISP_HAVE_X11    
    vpDisplay::displayCharString(I,vpImagePoint(y+epsi,topLeft.get_j()+epsj),valeur, vpColor::black);
#elif defined (VISP_HAVE_GDI) || defined (VISP_HAVE_OPENCV) || defined(VISP_HAVE_D3D9) || defined(VISP_HAVE_GTK)
    vpDisplay::displayCharString(I,vpImagePoint(y-epsi,topLeft.get_j()+epsj),valeur, vpColor::black);
#endif
  }
  if (power != 0)
  {
    sprintf(valeur, "x10e%d", -power);
#if defined VISP_HAVE_X11   
    vpDisplay::displayCharString(I,vpImagePoint(dTopLeft.get_i()-3*epsi,dTopLeft.get_j()-6*epsj),valeur, vpColor::black);
#elif defined (VISP_HAVE_GDI) || defined (VISP_HAVE_OPENCV) || defined(VISP_HAVE_D3D9) || defined(VISP_HAVE_GTK)
    vpDisplay::displayCharString(I,vpImagePoint(dTopLeft.get_i()-3*epsi,dTopLeft.get_j()-6*epsj),valeur, vpColor::black);
#endif
  }

  //Ligne horizontal
  vpDisplay::displayArrow(I,vpImagePoint(yorg,dTopLeft.get_j()), vpImagePoint(yorg,dTopLeft.get_j()+dWidth), vpColor::black, 4*gridThickness, 2*gridThickness, gridThickness);
  //Ligne verticale
  vpDisplay::displayArrow(I, vpImagePoint(dTopLeft.get_i()+dHeight,xorg), vpImagePoint(dTopLeft.get_i(),xorg), vpColor::black, 4*gridThickness, 2*gridThickness, gridThickness);
  
  if (dispUnit)
    displayUnit(I);
  if (dispTitle)
  displayTitle(I);
  if (dispLegend)
    displayLegend(I);
  
  //vpDisplay::flushROI(I,graphZone);
}

void
vpPlotGraph::displayUnit (vpImage<unsigned char> &
#if defined(VISP_HAVE_X11) || defined (VISP_HAVE_GDI) || defined(VISP_HAVE_OPENCV) || defined(VISP_HAVE_D3D9) || defined(VISP_HAVE_GTK)
                          I
#endif
                          )
{ 
    unsigned int offsetx = vpMath::minimum<unsigned int>((unsigned int)strlen(unitx), dWidth);

#if defined VISP_HAVE_X11   
  vpDisplay::displayCharString(I,vpImagePoint(yorg-2*epsi,dTopLeft.get_j()+dWidth-offsetx*epsj),unitx, vpColor::black);
  vpDisplay::displayCharString(I,vpImagePoint(dTopLeft.get_i(),dTopLeft.get_j()+epsj),unity, vpColor::black);
#elif defined (VISP_HAVE_GDI) || defined (VISP_HAVE_OPENCV) || defined(VISP_HAVE_D3D9) || defined(VISP_HAVE_GTK)
  vpDisplay::displayCharString(I,vpImagePoint(yorg-5*epsi,dTopLeft.get_j()+dWidth-offsetx*epsj),unitx, vpColor::black);
  vpDisplay::displayCharString(I,vpImagePoint(dTopLeft.get_i(),dTopLeft.get_j()+epsj),unity, vpColor::black);
#endif
}

void
vpPlotGraph::displayTitle (vpImage<unsigned char> &I)
{
  double size = (double)strlen(title);
  size = size/2.0;
  vpDisplay::displayCharString(I,
                   vpImagePoint(dTopLeft.get_i()-3*epsi,
                        dTopLeft.get_j()+dWidth/2.0-4*size),
                   title, 
                   vpColor::black);
}

void
vpPlotGraph::displayLegend (vpImage<unsigned char> &I)
{
  size_t offsetj = 0;
  for (unsigned int i = 0; i < curveNbr; i++) {
    size_t offset = epsj * strlen((curveList+i)->legend);
    offsetj = vpMath::maximum(offset, offsetj);
  }
  if (offsetj > dWidth) offsetj = dWidth;

  for (unsigned int i = 0; i < curveNbr; i++) {
    vpDisplay::displayCharString(I,
                                 vpImagePoint(dTopLeft.get_i()+i*5*epsi,
                                              dTopLeft.get_j()+dWidth-offsetj),
                                 (curveList+i)->legend,
                                 (curveList+i)->color);
  }
}

void
vpPlotGraph::rescalex(unsigned int side, double extremity)
{
  switch (side)
  {
    case 0:
      xmin = (3*extremity-xmax)/2;
      break;
    case 1:
      xmax = (3*extremity-xmin)/2;
      break;
  }
  
  xdelt = (xmax-xmin)/(double)nbDivisionx;
}

void
vpPlotGraph::rescaley(unsigned int side, double extremity)
{
  switch (side)
  {
    case 0:
      ymin = (3*extremity-ymax)/2;
      break;
    case 1:
      ymax = (3*extremity-ymin)/2;
      break;
  }
  
  ydelt = (ymax-ymin)/(double)nbDivisiony;
}

void
vpPlotGraph::initScale(vpImage<unsigned char> &I, const double x_min, const double x_max, const int nbDivx,
                       const double y_min, const double y_max, const int nbDivy, const bool gx, const bool gy)
{
  this->xmin = x_min;
  this->xmax = x_max;
  this->ymin = y_min;
  this->ymax = y_max;
  this->gridx = gx;
  this->gridy = gy;
  this->nbDivisionx = nbDivx;
  this->nbDivisiony = nbDivy;
  computeGraphParameters();
  clearGraphZone(I);
  displayGrid(I);
  vpDisplay::flushROI(I,graphZone);
  scaleInitialized = true;
}


void
vpPlotGraph::initScale(vpImage<unsigned char> &I, const double x_min, const double x_max, const int nbDivx,
                       const double y_min, const double y_max, const int nbDivy,
                       const double z_min, const double z_max, const int nbDivz, const bool gx, const bool gy)
{
  this->xmin = x_min;
  this->xmax = x_max;
  this->ymin = y_min;
  this->ymax = y_max;
  this->zmin = z_min;
  this->zmax = z_max;
  this->gridx = gx;
  this->gridy = gy;
  this->nbDivisionx = nbDivx;
  this->nbDivisiony = nbDivy;
  this->nbDivisionz = nbDivz;
  computeGraphParameters();
  clearGraphZone(I);
  displayGrid(I);
  vpDisplay::flushROI(I,graphZone);
  scaleInitialized = true;
}

void
vpPlotGraph::plot (vpImage<unsigned char> &I, const unsigned int curveNb, const double x, const double y)
{
  if (!scaleInitialized)
  {
    if (x < 0)
    {
      xmax = 0;
      rescalex(0,x);
    }
    if (x > 0)
    {
      xmin = 0;
      rescalex(1,x);
    }
    if (y < 0) 
    {      
      ymax = 0;
      rescaley(0,y);
    }
    if (y > 0)
    {
      ymin = 0;
      rescaley(1,y);
    }
    scaleInitialized = true;
    computeGraphParameters();
    clearGraphZone(I);
    displayGrid(I);
    //if (y == 0)
    if (std::fabs(y) <= std::numeric_limits<double>::epsilon())
      scaleInitialized = false;
  }
  
  if (firstPoint)
  {
//     clearGraphZone(I);
//     displayGrid(I);
//     vpDisplay::flushROI(I,graphZone);
    replot(I);
    firstPoint = false;
  }
  
  double i = yorg-(zoomy*y);
  double j = xorg+(zoomx*x);
  
  vpImagePoint iP(i,j);
  
  if (!iP.inRectangle(dGraphZone))
  {
    if (x > xmax) rescalex(1,x);
    else if(x < xmin) rescalex(0,x);
    
    if (y > ymax) rescaley(1,y);
    else if(y < ymin) rescaley(0,y);
    
    computeGraphParameters();
    
    replot(I);
    i = yorg-(zoomy*y);
    j = xorg+(zoomx*x);
    
    iP.set_ij(i,j);
  }
  
  (curveList+curveNb)->plotPoint(I, iP, x, y);
#if (!defined VISP_HAVE_X11 && defined FLUSH_ON_PLOT)
  vpDisplay::flushROI(I,graphZone);
  //vpDisplay::flush(I);
#endif
}

void
vpPlotGraph::replot (vpImage<unsigned char> &I)
{
  clearGraphZone(I);
  displayGrid(I);
  for (unsigned int i = 0; i < curveNbr; i++)
    (curveList+i)->plotList(I,xorg,yorg,zoomx,zoomy);
  vpDisplay::flushROI(I,graphZone);
}

void
vpPlotGraph::clearGraphZone(vpImage<unsigned char> &I)
{
  vpDisplay::displayROI(I,graphZone);
}

bool
vpPlotGraph::getPixelValue(vpImage<unsigned char> &I, vpImagePoint &iP)
{
  if (iP.inRectangle(dGraphZone))
  {
    double x = (iP.get_j()-xorg)/zoomx;
    double y = (yorg-iP.get_i())/zoomy;
    
    vpDisplay::displayROI(I,vpRect(vpImagePoint(topLeft.get_i()+height-20,topLeft.get_j()),width-1,19));
    char valeur[200];
    sprintf(valeur, " x: %f", x);
    vpDisplay::displayCharString(I,vpImagePoint(topLeft.get_i()+height-2,topLeft.get_j()+5*epsj),valeur, vpColor::black);
    sprintf(valeur, " y: %f", y);
    vpDisplay::displayCharString(I,vpImagePoint(topLeft.get_i()+height-2,topLeft.get_j()+width/2.0),valeur, vpColor::black);
//     vpDisplay::flush(I);
    vpDisplay::flushROI(I,vpRect(vpImagePoint(topLeft.get_i()+height-20,topLeft.get_j()),width-1,19));
    return true;
  }
  return false;
}

void 
vpPlotGraph::resetPointList(const unsigned int curveNum)
{
  (curveList+curveNum)->pointListx.clear();
  (curveList+curveNum)->pointListy.clear();
  (curveList+curveNum)->pointListz.clear();
  (curveList+curveNum)->nbPoint = 0;
  firstPoint = true;
}


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

bool
vpPlotGraph::check3Dline(vpImagePoint &iP1, vpImagePoint &iP2)
{
  bool iP1In = iP1.inRectangle(dGraphZone3D);
  bool iP2In = iP2.inRectangle(dGraphZone3D);
  
  if (!iP1In || !iP2In)
  {
    double dTopLeft_i = dTopLeft3D.get_i();
    double dTopLeft_j = dTopLeft3D.get_j();
    double dBottomRight_i = dTopLeft_i+dHeight;
    double dBottomRight_j = dTopLeft_j+dWidth;
    
    //Cas vertical
    if (vpImagePoint::distance(iP1,iP2) < 9)
      return false;
    if (fabs(iP2.get_j()-iP1.get_j()) <=2)
    {
      if (!iP1In && !iP2In)
      {
    if (iP1.get_i() < dTopLeft_i && iP2.get_i() < dTopLeft_i)
      return false;
    if (iP1.get_i() > dBottomRight_i && iP2.get_i() > dBottomRight_i)
      return false;
    if (iP1.get_j() < dTopLeft_j || iP1.get_j() > dBottomRight_j)
      return false;
    if (iP1.get_i() < dTopLeft_i) iP1.set_i(dTopLeft_i);
    else iP1.set_i(dBottomRight_i);
    if (iP2.get_i() < dTopLeft_i) iP2.set_i(dTopLeft_i);
    else iP2.set_i(dBottomRight_i);
      }
      else if (!iP1In)
      {
    if (iP1.get_j() < dTopLeft_j) iP1.set_j(dTopLeft_j);
    if (iP1.get_j() > dBottomRight_j) iP1.set_j(dBottomRight_j);
    if (iP1.get_i() < dTopLeft_i) iP1.set_i(dTopLeft_i);
    if (iP1.get_i() > dBottomRight_i) iP1.set_i(dBottomRight_i);
    return true;
      }
      else if (!iP2In)
      {
    if (iP2.get_j() < dTopLeft_j) iP2.set_j(dTopLeft_j);
    if (iP2.get_j() > dBottomRight_j) iP2.set_j(dBottomRight_j);
    if (iP2.get_i() < dTopLeft_i) iP2.set_i(dTopLeft_i);
    if (iP2.get_i() > dBottomRight_i) iP2.set_i(dBottomRight_i);
    return true;
      }
    }
    //cas horizontal
    else if (fabs(iP2.get_i()-iP1.get_i()) <= 2)
    {
      if (!iP1In && !iP2In)
      {
    if (iP1.get_j() < dTopLeft_j && iP2.get_j() < dTopLeft_j)
      return false;
    if (iP1.get_j() > dBottomRight_j && iP2.get_j() > dBottomRight_j)
      return false;
    if (iP1.get_i() < dTopLeft_i || iP1.get_i() > dBottomRight_i)
      return false;
    if (iP1.get_j() < dTopLeft_j) iP1.set_j(dTopLeft_j);
    else iP1.set_j(dBottomRight_j);
    if (iP2.get_j() < dTopLeft_j) iP2.set_j(dTopLeft_j);
    else iP2.set_j(dBottomRight_j);
      }
      else if (!iP1In)
      {
    if (iP1.get_j() < dTopLeft_j) iP1.set_j(dTopLeft_j);
    if (iP1.get_j() > dBottomRight_j) iP1.set_j(dBottomRight_j);
    if (iP1.get_i() < dTopLeft_i) iP1.set_i(dTopLeft_i);
    if (iP1.get_i() > dBottomRight_i) iP1.set_i(dBottomRight_i);
    return true;
      }
      else if (!iP2In)
      {
    if (iP2.get_j() < dTopLeft_j) iP2.set_j(dTopLeft_j);
    if (iP2.get_j() > dBottomRight_j) iP2.set_j(dBottomRight_j);
    if (iP2.get_i() < dTopLeft_i) iP2.set_i(dTopLeft_i);
    if (iP2.get_i() > dBottomRight_i) iP2.set_i(dBottomRight_i);
    return true;
      }
    }
    
    double a = (iP2.get_i()-iP1.get_i())/(iP2.get_j()-iP1.get_j());
    double b = iP1.get_i()-a*iP1.get_j();

    //test horizontal
    double jtop = (dTopLeft_i-b)/a;
    double jlow = (dBottomRight_i-b)/a;
    //test vertical
    double ileft = dTopLeft_j*a+b;
    double iright = (dBottomRight_j)*a+b;
    
    vpImagePoint iP[2];
    int n = 0;
    
    if(jtop >= dTopLeft_j && jtop <= dBottomRight_j)
    {
      iP[n].set_ij(dTopLeft_i,jtop);
      n++;
    }
    if(jlow >= dTopLeft_j && jlow <= dBottomRight_j)
    {
      iP[n].set_ij(dBottomRight_i,jlow);
      n++;
    }
    if(ileft >= dTopLeft_i && ileft <= dBottomRight_i && n <2)
    {
      iP[n].set_ij(ileft,dTopLeft_j);
      n++;
    }
    if(iright >= dTopLeft_i && iright <= dBottomRight_i && n <2)
    {
      iP[n].set_ij(iright,dBottomRight_j);
      n++;
    }
    
    if (n < 2)
      return false;
    
    if (!iP1In && !iP2In)
    {
      if (fabs(a) < 1)
      {
    if (vpMath::sign(iP1.get_j()-iP[0].get_j()) == vpMath::sign(iP2.get_j()-iP[0].get_j()))
      return false;
        int sign = vpMath::sign(iP1.get_j() - iP2.get_j());
    if (sign == vpMath::sign(iP[0].get_j()-iP[1].get_j())) 
    {
      iP1 = iP[0]; iP2 = iP[1];
    }
    else
    {
      iP1 = iP[1]; iP2 = iP[0];
    }
      }
      else
      {
    if (vpMath::sign(iP1.get_i()-iP[0].get_i()) == vpMath::sign(iP2.get_i()-iP[0].get_i()))
      return false;
        int sign = vpMath::sign(iP1.get_i() - iP2.get_i());
    if (sign == vpMath::sign(iP[0].get_i()-iP[1].get_i()))
    {
      iP1 = iP[0];iP2 = iP[1];
    }
    else
    {
      iP1 = iP[1];iP2 = iP[0];
    }
      }
    }
    else if (!iP1In)
    {
      vpImagePoint iPtemp = iP1;
      if (fabs(a) < 1)
      {
        int sign = vpMath::sign(iP1.get_j() - iP2.get_j());
    if (fabs(iP[0].get_j()-iP2.get_j()) > 5)
    {
      if (sign == vpMath::sign(iP[0].get_j()-iP2.get_j())) iP1 = iP[0];
      else iP1 = iP[1];
    }
    else
    {
      if (sign == vpMath::sign(iP[1].get_j()-iP2.get_j())) iP1 = iP[1];
      else iP1 = iP[0];
    }
      }
      else
      {
        int sign = vpMath::sign(iP1.get_i() - iP2.get_i());
    if (fabs(iP[0].get_i()-iP2.get_i()) > 5)
    {
      if (sign == vpMath::sign(iP[0].get_i()-iP2.get_i())) iP1 = iP[0];
      else iP1 = iP[1];
    }
    else
    {
      if (sign == vpMath::sign(iP[1].get_i()-iP2.get_i())) iP1 = iP[1];
      else iP1 = iP[0];
    }
      }
      if (vpImagePoint::distance(iP1,iP2) < 9)
      {
    iP1 = iPtemp;
        return false;
      }
    }
    else if (!iP2In)
    {
      vpImagePoint iPtemp = iP2;
      if (fabs(a) < 1)
      {
        int sign = vpMath::sign(iP2.get_j() - iP1.get_j());
    if (fabs(iP[0].get_j()-iP1.get_j()) > 5)
    {
      if (sign == vpMath::sign(iP[0].get_j()-iP1.get_j())) iP2 = iP[0];
      else iP2 = iP[1];
    }
    else
    {
      if (sign == vpMath::sign(iP[1].get_j()-iP1.get_j())) iP2 = iP[1];
      else iP2 = iP[0];
    }
      }
      else
      {
        int sign = vpMath::sign(iP2.get_i() - iP1.get_i());
    if (fabs(iP[0].get_i()-iP1.get_i()) > 5)
    {
      if (sign == vpMath::sign(iP[0].get_i()-iP1.get_i())) iP2 = iP[0];
      else iP2 = iP[1];
    }
    else
    {
      if (sign == vpMath::sign(iP[1].get_i()-iP1.get_i())) iP2 = iP[1];
      else iP2 = iP[0];
    }  
      }
      if (vpImagePoint::distance(iP1,iP2) < 9)
      {
    iP2 = iPtemp;
        return false;
      }
    }
  }
  return true;
}

bool 
vpPlotGraph::check3Dpoint(vpImagePoint &iP)
{ 
  if (!iP.inRectangle(dGraphZone3D))
  {
    if (iP.get_i() < dTopLeft3D.get_i())
      iP.set_i(dTopLeft3D.get_i());
    else if (iP.get_i() > dTopLeft3D.get_i()+dHeight)
      iP.set_i(dTopLeft3D.get_i()+dHeight-1);
    if (iP.get_j() <dTopLeft3D.get_j())
      iP.set_j(dTopLeft3D.get_j());
    else if (iP.get_j() > dTopLeft3D.get_j()+dWidth)
      iP.set_j(dTopLeft3D.get_j()+dWidth-1);
    return false;
  }
  return true;
}

void
vpPlotGraph::computeGraphParameters3D()
{
  zoomx_3D = w_xsize/(xmax-xmin);
  zoomy_3D = w_ysize/(ymax-ymin);
  zoomz_3D = w_zsize/(zmax-zmin);
  ptXorg = w_xval - zoomx_3D*xmax;
  ptYorg = w_yval + zoomy_3D*ymin;
  ptZorg = w_zval - zoomz_3D*zmax;
}

void getGrid3DPoint(const double pente, vpImagePoint &iPunit, vpImagePoint &ip1, vpImagePoint &ip2, vpImagePoint &ip3)
{
  if (pente <= 1)
    {
      ip1 = iPunit-vpImagePoint(3,0);
      ip2 = iPunit+vpImagePoint(3,0);
      ip3 = iPunit-vpImagePoint(6,6);
    }
    else 
    {
      ip1 = iPunit-vpImagePoint(0,3);
      ip2 = iPunit+vpImagePoint(0,3);
      ip3 = iPunit+vpImagePoint(6,6);
    }
}

void
vpPlotGraph::displayGrid3D (vpImage<unsigned char> &I)
{
  computeGraphParameters3D();
  
  xdelt = (xmax-xmin)/nbDivisionx;
  ydelt = (ymax-ymin)/nbDivisiony;
  zdelt = (zmax-zmin)/nbDivisionz;
  
  vpPoint pt[6];
  pt[0].setWorldCoordinates(-w_xval,ptYorg,ptZorg);
  pt[1].setWorldCoordinates(w_xval,ptYorg,ptZorg);
  pt[2].setWorldCoordinates(ptXorg,-w_yval,ptZorg);
  pt[3].setWorldCoordinates(ptXorg,w_yval,ptZorg);
  pt[4].setWorldCoordinates(ptXorg,ptYorg,-w_zval);
  pt[5].setWorldCoordinates(ptXorg,ptYorg,w_zval);
  
  vpImagePoint iP[6];
  for (unsigned int i = 0; i < 6; i++)
  {
    pt[i].track(cMo);
    double u=0.0,v=0.0;
    vpMeterPixelConversion::convertPoint(cam,pt[i].get_x(),pt[i].get_y(),u,v);
    iP[i].set_uv(u,v);
    iP[i] = iP[i] + dTopLeft3D;
  }
  
  int power;
  double t;
  char valeur[20];
  vpPoint ptunit;
  vpImagePoint iPunit;
  double pente;
  vpImagePoint ip1;
  vpImagePoint ip2;
  vpImagePoint ip3;
  vpImagePoint ip4;
  
  power = laFonctionSansNom(xdelt);
  ptunit.setWorldCoordinates(-w_xval,ptYorg,ptZorg);
  //if (iP[0].get_j()-iP[1].get_j() != 0) 
  if (std::fabs(iP[0].get_j()-iP[1].get_j()) > 
      vpMath::maximum(std::fabs(iP[0].get_j()), std::fabs(iP[1].get_j()))* std::numeric_limits<double>::epsilon())
    pente = fabs((iP[0].get_i()-iP[1].get_i())/(iP[0].get_j()-iP[1].get_j()));
  else pente = 2;
  
  unsigned int count = 1;
  for(t=xmin;t<=xmax;t=t+xdelt)
  {
    double x = ptXorg+(zoomx_3D*t);
    ptunit.set_oX(x);
    ptunit.track(cMo);
    double u=0.0, v=0.0;
    vpMeterPixelConversion::convertPoint(cam,ptunit.get_x(),ptunit.get_y(),u,v);
    iPunit.set_uv(u,v);
    iPunit = iPunit + dTopLeft3D;
    
    getGrid3DPoint(pente,iPunit,ip1,ip2,ip3);
    
    if(check3Dline(ip1,ip2))
    {
      vpDisplay::displayLine(I,ip2, ip1, vpColor::black);
      if (count%2 == 1)
      {
        double ttemp;
        if (power!=0)
          ttemp = t*pow(10.0,power); 
        else ttemp = t;
        sprintf(valeur, "%.1f", ttemp);
        vpDisplay::displayCharString(I,ip3,valeur, vpColor::black);
      }
    }
    count++;
  }
  if (power != 0)
  {
    ip4 = iP[1] -vpImagePoint(-15,10);
    sprintf(valeur, "x10e%d", -power);
    if(check3Dpoint(ip4))
      vpDisplay::displayCharString(I,ip4,valeur, vpColor::black);
  }
  
  power = laFonctionSansNom(ydelt);
  ptunit.setWorldCoordinates(ptXorg,-w_yval,ptZorg);
  //if (iP[2].get_j()-iP[3].get_j() != 0) 
  if (std::fabs(iP[2].get_j()-iP[3].get_j()) > 
      vpMath::maximum(std::fabs(iP[2].get_j()), std::fabs(iP[3].get_j()))* std::numeric_limits<double>::epsilon())
    pente = fabs((iP[2].get_i()-iP[3].get_i())/(iP[2].get_j()-iP[3].get_j()));
  else pente = 2;
  count = 0;
  for(t=ymin;t<=ymax;t=t+ydelt)
  {
    double y = ptYorg-(zoomy_3D*t);
    ptunit.set_oY(y);
    ptunit.track(cMo);
    double u=0.0, v=0.0;
    vpMeterPixelConversion::convertPoint(cam,ptunit.get_x(),ptunit.get_y(),u,v);
    iPunit.set_uv(u,v);
    iPunit = iPunit + dTopLeft3D;
    
    getGrid3DPoint(pente,iPunit,ip1,ip2,ip3);
    
    if(check3Dline(ip1,ip2))
    {
      vpDisplay::displayLine(I,ip1, ip2, vpColor::black);
      if (count%2 == 1)
      {
        double ttemp;
        if (power!=0)
          ttemp = t*pow(10.0,power); 
        else ttemp = t;
        sprintf(valeur, "%.1f", ttemp);
        vpDisplay::displayCharString(I,ip3,valeur, vpColor::black);
      }
    }
    count++;
  }
  if (power != 0)
  {
    ip4 = iP[2] -vpImagePoint(-15,10);
    sprintf(valeur, "x10e%d", -power);
    if(check3Dpoint(ip4))
    vpDisplay::displayCharString(I,ip4,valeur, vpColor::black);
  }
  
  power = laFonctionSansNom(zdelt);
  ptunit.setWorldCoordinates(ptXorg,ptYorg,-w_zval);
  //if (iP[4].get_j()-iP[5].get_j() != 0) 
  if (std::fabs(iP[4].get_j()-iP[5].get_j()) > 
      vpMath::maximum(std::fabs(iP[4].get_j()), std::fabs(iP[5].get_j()))* std::numeric_limits<double>::epsilon())
    pente = fabs((iP[4].get_i()-iP[5].get_i())/(iP[4].get_j()-iP[5].get_j()));
  else pente = 2;
  count = 0;
  for(t=zmin;t<=zmax;t=t+zdelt)
  {
    double z = ptZorg+(zoomz_3D*t);
    ptunit.set_oZ(z);
    ptunit.track(cMo);
    double u=0.0, v=0.0;
    vpMeterPixelConversion::convertPoint(cam,ptunit.get_x(),ptunit.get_y(),u,v);
    iPunit.set_uv(u,v);
    iPunit = iPunit + dTopLeft3D;
 
    getGrid3DPoint(pente,iPunit,ip1,ip2,ip3);
    
    if(check3Dline(ip1,ip2))
    {
      vpDisplay::displayLine(I,ip1, ip2, vpColor::black);
      if (count%2 == 1)
      {
        double ttemp;
        if (power!=0)
          ttemp = t*pow(10.0,power); 
        else ttemp = t;
        sprintf(valeur, "%.1f", ttemp);
        vpDisplay::displayCharString(I,ip3,valeur, vpColor::black);
      }
    }
    count++;
  }
  if (power != 0)
  {
    ip4 = iP[5] -vpImagePoint(-15,10);
    sprintf(valeur, "x10e%d", -power);
    if(check3Dpoint(ip4))
      vpDisplay::displayCharString(I,ip4,valeur, vpColor::black);
  }
  
  
//Ligne horizontal
  if (check3Dline(iP[0],iP[1]))
  {
    vpDisplay::displayArrow(I,iP[0],iP[1], vpColor::black, gridThickness);
    if (dispUnit)
    {
      iPunit.set_ij(iP[1].get_i(),iP[1].get_j()-10*epsj);
      check3Dpoint (iPunit);
      vpDisplay::displayCharString(I,iPunit,unitx, vpColor::black);
    }
  }
  if (check3Dline(iP[3],iP[2]))
  {
    vpDisplay::displayArrow(I,iP[3],iP[2], vpColor::black, gridThickness);
    if (dispUnit)
    {
      iPunit.set_ij(iP[2].get_i(),iP[2].get_j()-10*epsj);
      check3Dpoint (iPunit);
      vpDisplay::displayCharString(I,iPunit,unity, vpColor::black);
    }
  }
  if (check3Dline(iP[4],iP[5]))
  {
    vpDisplay::displayArrow(I,iP[4],iP[5], vpColor::black, gridThickness);
    if (dispUnit)
    {
      iPunit.set_ij(iP[5].get_i(),iP[5].get_j()-10*epsj);
      check3Dpoint (iPunit);
      vpDisplay::displayCharString(I,iPunit,unitz, vpColor::black);
    }
  }
  
  if (dispTitle)
    displayTitle(I);
  if (dispLegend)
    displayLegend(I);
}

vpMouseButton::vpMouseButtonType
vpPlotGraph::plot (vpImage<unsigned char> &I, const unsigned int curveNb, const double x, const double y, const double z)
{
  if (!scaleInitialized)
  {
    if (x < 0)
    {
      xmax = 0;
      rescalex(0,x);
    }
    if (x > 0)
    {
      xmin = 0;
      rescalex(1,x);
    }
    if (y < 0) 
    {      
      ymax = 0;
      rescaley(0,y);
    }
    if (y > 0)
    {
      ymin = 0;
      rescaley(1,y);
    }
    if (z < 0) 
    {      
      zmax = 0;
      rescalez(0,z);
    }
    if (z > 0)
    {
      zmin = 0;
      rescalez(1,z);
    }
    scaleInitialized = true;
    computeGraphParameters3D();
    clearGraphZone(I);
    displayGrid3D(I);
    //if (std::fabs(y) == 0 || z == 0)
    if (std::fabs(y) <= std::numeric_limits<double>::epsilon()  || std::fabs(z) <= std::numeric_limits<double>::epsilon())
      scaleInitialized = false;
  }
  
  if (firstPoint)
  {
    clearGraphZone(I);
    displayGrid3D(I);
    vpDisplay::flushROI(I,graphZone);
    firstPoint = false;
  }
  
  bool changed = false;
  if (x > xmax) {rescalex(1,x); changed = true;}
  else if(x < xmin) {rescalex(0,x);changed = true;}
    
  if (y > ymax) {rescaley(1,y);changed = true;}
  else if(y < ymin) {rescaley(0,y);changed = true;}
  
  if (z > zmax) {rescalez(1,z);changed = true;}
  else if(z < zmin) {rescalez(0,z);changed = true;}
  
  vpMouseButton::vpMouseButtonType button = vpMouseButton::none;

  if (changed || move(I, button))
  {
    computeGraphParameters3D();
    replot3D(I);
  }

  vpPoint pointPlot;
  pointPlot.setWorldCoordinates(ptXorg+(zoomx_3D*x),ptYorg-(zoomy_3D*y),ptZorg+(zoomz_3D*z));
  pointPlot.track(cMo);
  double u=0.0, v=0.0;
  vpMeterPixelConversion::convertPoint(cam,pointPlot.get_x(),pointPlot.get_y(),u,v);
  vpImagePoint iP;
  iP.set_uv(u,v);
  iP = iP + dTopLeft3D;
  
  (curveList+curveNb)->pointListx.end();
  (curveList+curveNb)->pointListy.end();
  (curveList+curveNb)->pointListz.end();
  if((curveList+curveNb)->nbPoint)
  {
    if (check3Dline((curveList+curveNb)->lastPoint,iP))
      vpDisplay::displayLine(I,(curveList+curveNb)->lastPoint, iP, (curveList+curveNb)->color, (curveList+curveNb)->thickness);
  }
#if( defined VISP_HAVE_X11 || defined VISP_HAVE_GDI )
  double top;
  double left;
  double width_;
  double height_;
  
  if (iP.get_i() <= (curveList+curveNb)->lastPoint.get_i()) {top = iP.get_i()-5; height_ = (curveList+curveNb)->lastPoint.get_i() - top+10;}
  else {top = (curveList+curveNb)->lastPoint.get_i()-5; height_ = iP.get_i() - top+10;}
  if (iP.get_j() <= (curveList+curveNb)->lastPoint.get_j()) {left = iP.get_j()-5; width_ = (curveList+curveNb)->lastPoint.get_j() - left+10;}
  else {left = (curveList+curveNb)->lastPoint.get_j()-5; width_ = iP.get_j() - left+10;}
  vpDisplay::flushROI(I,vpRect(left,top,width_,height_));
#endif
  
  (curveList+curveNb)->lastPoint = iP;
  (curveList+curveNb)->pointListx.push_back(x);
  (curveList+curveNb)->pointListy.push_back(y);
  (curveList+curveNb)->pointListz.push_back(z);
  (curveList+curveNb)->nbPoint++;
  
#if( !defined VISP_HAVE_X11 && defined FLUSH_ON_PLOT)  
  vpDisplay::flushROI(I,graphZone);
#endif
  return button;
}

void
vpPlotGraph::replot3D (vpImage<unsigned char> &I)
{
  clearGraphZone(I);
  displayGrid3D(I);
  
  for (unsigned int i = 0; i < curveNbr; i++)
  {
    std::list<double>::const_iterator it_ptListx = (curveList+i)->pointListx.begin();
    std::list<double>::const_iterator it_ptListy = (curveList+i)->pointListy.begin();
    std::list<double>::const_iterator it_ptListz = (curveList+i)->pointListz.begin();
  
    unsigned int k = 0;
    vpImagePoint iP;
    vpPoint pointPlot;
    double x,y,z;
    while (k < (curveList+i)->nbPoint)
    {
      x = *it_ptListx;
      y = *it_ptListy;
      z = *it_ptListz;
      pointPlot.setWorldCoordinates(ptXorg+(zoomx_3D*x),ptYorg-(zoomy_3D*y),ptZorg+(zoomz_3D*z));
      pointPlot.track(cMo);
      double u=0.0, v=0.0;
      vpMeterPixelConversion::convertPoint(cam,pointPlot.get_x(),pointPlot.get_y(),u,v);
      iP.set_uv(u,v);
      iP = iP + dTopLeft3D;
    
      //vpDisplay::displayCross(I,iP,3,vpColor::cyan);
      if (k > 0)
      {
        if (check3Dline((curveList+i)->lastPoint,iP))
          vpDisplay::displayLine(I,(curveList+i)->lastPoint, iP, (curveList+i)->color);
        //vpDisplay::displayCross(I,iP,3,vpColor::orange);
      }
    
      (curveList+i)->lastPoint = iP;
    
      ++it_ptListx;
      ++it_ptListy;
      ++it_ptListz;
      k++;
    }
  }
  vpDisplay::flushROI(I,graphZone);
}



void
vpPlotGraph::rescalez(unsigned int side, double extremity)
{
  switch (side)
  {
    case 0:
      zmin = (3*extremity-zmax)/2;
      break;
    case 1:
      zmax = (3*extremity-zmin)/2;
      break;
  }
  
  zdelt = (zmax-zmin)/(double)nbDivisionz;
}

bool
vpPlotGraph::move(const vpImage<unsigned char> &I, vpMouseButton::vpMouseButtonType &button)
{
  bool changed = false;
  vpHomogeneousMatrix displacement = navigation(I, changed, button);

  //if (displacement[2][3] != 0)
  if (std::fabs(displacement[2][3]) > std::numeric_limits<double>::epsilon())
    cMf = cMf*displacement;
  vpHomogeneousMatrix fMo = cMf.inverse()*cMo;
  
  cMo = cMf* displacement * fMo;
  return changed;
}

vpHomogeneousMatrix
vpPlotGraph::navigation(const vpImage<unsigned char> &I, bool &changed, vpMouseButton::vpMouseButtonType &b)
{
  vpImagePoint iP;
  vpImagePoint trash;
  bool clicked = false;
  bool clickedUp = false;

  vpHomogeneousMatrix mov(0,0,0,0,0,0);
  changed = false;

  //if(!blocked) vpDisplay::getClickUp(I,trash, b,false);
  
  if(!blocked) clicked = vpDisplay::getClick(I,iP,b,false);

  if(blocked) clickedUp = vpDisplay::getClickUp(I,trash, b,false);
  
  if (clicked)
  {
    if (!iP.inRectangle(graphZone))
      return mov;
  }

  if(clicked)
  {
    if (b == vpMouseButton::button1) blockedr = true;
    if (b == vpMouseButton::button2) blockedz = true;
    blocked = true;
  }
  
  else if(clickedUp)
  {
    if (b == vpMouseButton::button1)
    {
      old_iPr = vpImagePoint(-1,-1);
      blockedr = false;
    }
    if (b == vpMouseButton::button2)
    {
      old_iPz = vpImagePoint(-1,-1);
      blockedz = false;
    }
    if (!(blockedr || blockedz))
    {
      blocked = false;
      //while (vpDisplay::getClick(I,trash,b,false)) {};
    }
  }

  vpDisplay::getPointerPosition(I,iP);

  double anglei = 0;
  double anglej = 0;

  if (old_iPr != vpImagePoint(-1,-1) && blockedr)
  {
    double width_ = vpMath::minimum(I.getWidth(),I.getHeight());
    
    double diffi = iP.get_i() - old_iPr.get_i();
    double diffj = iP.get_j() - old_iPr.get_j();
    
    anglei = diffi*360/width_;
    anglej = diffj*360/width_;
    mov.buildFrom(0,0,0,vpMath::rad(anglei),vpMath::rad(-anglej),0);
    changed = true;
  }

  if (blockedr) old_iPr = iP;

  if (old_iPz != vpImagePoint(-1,-1) && blockedz)
  {
    double diffi = iP.get_i() - old_iPz.get_i();
    mov.buildFrom(0,0,diffi*0.01,0,0,0);
    changed = true;
  }

  if (blockedz) old_iPz = iP;

  return mov;
}

#elif !defined(VISP_BUILD_SHARED_LIBS)
// Work arround to avoid warning: libvisp_core.a(vpPlotGraph.cpp.o) has no symbols
void dummy_vpPlotGraph() {};
#endif
#endif