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cgal
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Draw face/vertex/edge with its own colour or a random colour

This commit is contained in:
maximecharriere 2022-08-29 19:57:32 +02:00
parent 585d0dc3dd
commit fa4d69c1fa
1 changed files with 24 additions and 9 deletions
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33
BGL/include/CGAL/draw_face_graph.h
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@ -22,17 +22,29 @@
namespace CGAL namespace CGAL
{ {
template <typename EI>
std::string getColorPropertyName(void) { return std::string("color"); }
template <>
inline std::string getColorPropertyName<CGAL::SM_Face_index>(void) { return std::string("f:color"); }
template <>
inline std::string getColorPropertyName<CGAL::SM_Edge_index>(void) { return std::string("e:color"); }
template <>
inline std::string getColorPropertyName<CGAL::SM_Vertex_index>(void) { return std::string("v:color"); }
// Default color functor; user can change it to have its own face color // Default color functor; user can change it to have its own face color
struct DefaultColorFunctorFaceGraph struct DefaultColorFunctorFaceGraph
{ {
template<typename Graph> template<typename Graph, typename EI>
CGAL::IO::Color operator()(const Graph&, CGAL::IO::Color operator()(const Graph& mesh,
typename boost::graph_traits<Graph>::face_descriptor fh) const EI elementIndex) const
{ {
if (fh==boost::graph_traits<Graph>::null_face()) // use to get the mono color typename Graph::template Property_map<EI, CGAL::IO::Color> colorPm;
return CGAL::IO::Color(100, 125, 200); // R G B between 0-255 bool found;
std::tie(colorPm, found) = mesh.property_map<EI, CGAL::IO::Color>(getColorPropertyName<EI>()); //Get the color property map
return get_random_color(CGAL::get_default_random()); return found ? colorPm[elementIndex] : get_random_color(CGAL::get_default_random()); //return the element color if any, otherwise return a random color
} }
}; };
@ -159,13 +171,16 @@ protected:
for (auto e: edges(sm)) for (auto e: edges(sm))
{ {
CGAL::IO::Color c=fcolor(sm, e);
add_segment(get(point_pmap, source(halfedge(e, sm), sm)), add_segment(get(point_pmap, source(halfedge(e, sm), sm)),
get(point_pmap, target(halfedge(e, sm), sm))); get(point_pmap, target(halfedge(e, sm), sm)),
c);
} }
for (auto v: vertices(sm)) for (auto v: vertices(sm))
{ {
this->add_point(get(point_pmap, v)); CGAL::IO::Color c=fcolor(sm, v);
this->add_point(get(point_pmap, v), c);
} }
}; };
} }