\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)

CGAL 4.8 - Geomview

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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