/*
 * ViSP, open source Visual Servoing Platform software.
 * Copyright (C) 2005 - 2025 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 as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 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 https://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:
 * Example which describes how to use the vpPlot class
 *
 */

/*!
  \example plot3d.cpp

  Plot 3D curves example.
*/

#include <iostream>
#include <visp3/core/vpConfig.h>
#include <visp3/gui/vpPlot.h>

int main()
{
#if defined(VISP_HAVE_DISPLAY)
#ifdef ENABLE_VISP_NAMESPACE
  using namespace VISP_NAMESPACE_NAME;
#endif

  try {
    // Create a window with one graphic
    vpPlot plot(1);

    // Change the default font
    // plot.setFont("-misc-fixed-bold-r-semicondensed--0-0-75-75-c-0-iso8859-10");

    // The graphic contains 2 curves
    plot.initGraph(0, 2);

    // Set the graphic parameters
    plot.setTitle(0, "First graphic");
    plot.setUnitX(0, "time (s)");
    plot.setUnitY(0, "y");
    plot.setUnitZ(0, "z");
    plot.setLegend(0, 0, "y^2+z^2=1 and y(0) = 1");
    plot.setLegend(0, 1, "y^2+z^2=1 and y(0) = -1");
    plot.setColor(0, 0, vpColor::red);
    plot.setColor(0, 1, vpColor::green);

    double x = 0;
    double y = 1;
    double z = 0;
    double dx = 0.08;
    double dy = 0.04;
    double zsign = 1.0;

    unsigned long iter = 0;

    std::cout << "Hit CTRL-C to or right mouse button to exit..." << std::endl;
    bool end = false;
    while (!end) {
      if (iter < 300) {
        // y*y+z*z = 1
        if (fabs(y) < 1.0)
          z = sqrt(1.0 - y * y);
        else
          z = 0;

        // Add points to the graphic
        if (plot.plot(0, 0, x, y, z * zsign) == vpMouseButton::button3)
          end = true;
        if (plot.plot(0, 1, x, -y, -z * zsign) == vpMouseButton::button3)
          end = true;

        x += dx;

        if (fabs(y) >= 1.0)
          dy = -dy;
        y += dy;
        if (fabs(y) >= 1.0)
          zsign = -zsign;
      }
      else {
     // Tip: to allows modifying the point of view with the mouse we
     // plot always the last point
        if (plot.plot(0, 0, x, y, z * zsign) == vpMouseButton::button3)
          end = true;
        if (plot.plot(0, 1, x, -y, -z * zsign) == vpMouseButton::button3)
          end = true;
      }
      iter++;
    }
    return EXIT_SUCCESS;
  }
  catch (const vpException &e) {
    std::cout << "Catch an exception: " << e << std::endl;
    return EXIT_FAILURE;
  }
#else
  std::cout << "Plot functionalities are not avalaible since no display is "
    "available."
    << std::endl;
  return EXIT_SUCCESS;
#endif
}