CGAL 6.1.2 - CGAL Basic Viewer

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Basic_viewer/draw_surface_mesh_vcolor.cpp
#include <CGAL/Simple_cartesian.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/draw_surface_mesh.h>
#include <CGAL/Graphics_scene_options.h>
#include <fstream>
using Kernel=CGAL::Simple_cartesian<double>;
using Point=Kernel::Point_3;
using Mesh=CGAL::Surface_mesh<Point>;
// Inherit from CGAL::Graphics_scene_options to get all the default values.
struct My_graphics_scene_options:
public CGAL::Graphics_scene_options<Mesh,
typename boost::graph_traits<Mesh>::vertex_descriptor,
typename boost::graph_traits<Mesh>::edge_descriptor,
typename boost::graph_traits<Mesh>::face_descriptor>
{
// All vertices are colored.
bool colored_vertex(const Mesh&,
typename boost::graph_traits<Mesh>::vertex_descriptor) const
{ return true; }
// Change the color of vertices randomly.
CGAL::IO::Color vertex_color(const Mesh&,
typename boost::graph_traits<Mesh>::vertex_descriptor) const
{
static bool v_green=true;
v_green=!v_green;
if(v_green) // 1 vertex out of two green (randomly)
{ return CGAL::IO::Color(0,220,0); }
else // the others are blue
{ return CGAL::IO::Color(0,0,220); }
}
};
int main(int argc, char* argv[])
{
const std::string filename = (argc>1) ? argv[1] : CGAL::data_file_path("meshes/elephant.off");
Mesh sm;
if(!CGAL::IO::read_polygon_mesh(filename, sm))
{
std::cerr << "Invalid input file: " << filename << std::endl;
return EXIT_FAILURE;
}
// Draw the mesh using the new graphics scene option.
CGAL::draw(sm, My_graphics_scene_options());
return EXIT_SUCCESS;
}
CGAL::IO::Color
CGAL::Surface_mesh
Kernel::Point_3
CGAL::draw
void draw(const PS2 &ps2, const GSOptions &gso)
Kernel
CGAL::Graphics_scene_options
The class Graphics_scene_options is used to tune the way that the cells of a given data structure of ...
Definition: Graphics_scene_options.h:28
CGAL::Simple_cartesian