Geomview/gv_terrain.cpp

#include <CGAL/Cartesian.h>
#include <iostream>

#ifndef CGAL_USE_GEOMVIEW
int main()
{
  std::cout << "Geomview doesn't work on Windows, so..." << std::endl;
  return 0;
}
#else

#include <fstream>
#include <unistd.h> // for sleep()

#include <CGAL/Projection_traits_xy_3.h>

#include <CGAL/Delaunay_triangulation_2.h>
#include <CGAL/Delaunay_triangulation_3.h>

#include <CGAL/IO/Geomview_stream.h>
#include <CGAL/IO/Triangulation_geomview_ostream_2.h>
#include <CGAL/IO/Triangulation_geomview_ostream_3.h>

#include <CGAL/intersections.h>

typedef CGAL::Cartesian<double>  K;

typedef K::Point_2 Point2;
typedef CGAL::Projection_traits_xy_3<K> Gt3;
typedef Gt3::Point Point3;

typedef CGAL::Delaunay_triangulation_2<K>   Delaunay;
typedef CGAL::Delaunay_triangulation_2<Gt3> Terrain;

typedef CGAL::Delaunay_triangulation_3<K>   Delaunay3d;

int main()
{
  CGAL::Geomview_stream gv(CGAL::Bbox_3(-100, -100, -100, 600, 600, 600));
  gv.set_line_width(4);
  // gv.set_trace(true);
  gv.set_bg_color(CGAL::Color(0, 200, 200));
  // gv.clear();

  Delaunay D;
  Delaunay3d D3d;
  Terrain T;
  std::ifstream iFile("data/points3", std::ios::in);
  Point3 p;

  while ( iFile >> p )
  {
      D.insert( Point2(p.x(), p.y()) );
      D3d.insert( p );
      T.insert( p );
  }

  // use different colors, and put a few sleeps/clear.

  gv << CGAL::blue();
  std::cout << "Drawing 2D Delaunay triangulation in wired mode.\n";
  gv.set_wired(true);
  gv << D;

#if 1 // It's too slow !  Needs to use OFF for that.
  gv << CGAL::red();
  std::cout << "Drawing its Voronoi diagram.\n";
  gv.set_wired(true);
  D.draw_dual(gv);
#endif

  sleep(5);
  gv.clear();

  std::cout << "Drawing 2D Delaunay triangulation in non-wired mode.\n";
  gv.set_wired(false);
  gv << D;
  sleep(5);
  gv.clear();

  std::cout << "Drawing 3D Delaunay triangulation in wired mode.\n";
  gv.set_wired(true);
  gv << D3d;
  sleep(5);
  gv.clear();
  std::cout << "Drawing 3D Delaunay triangulation in non-wired mode.\n";
  gv.set_wired(false);
  gv << D3d;
  sleep(5);
  gv.clear();

  std::cout << "Drawing Terrain in wired mode.\n";
  gv.set_wired(true);
  gv << T;
  sleep(5);
  gv.clear();
  std::cout << "Drawing Terrain in non-wired mode.\n";
  gv.set_wired(false);
  gv << T;

  std::cout << "Enter a key to finish" << std::endl;
  char ch;
  std::cin >> ch;

  return 0;
}
#endif