void VoronoiCgal_Patch::Compute()
{
m_CgalPatchs = MakePatchs(m_ImageSpline);
for (int i = 0; i < m_CgalPatchs.size(); ++i)
{
m_Delaunay = Delaunay();
insert_polygon(m_Delaunay, m_ImageSpline, i);
insert_polygonInter(m_Delaunay, m_ImageSpline, i);
Mesher mesher(m_Delaunay);
Criteria criteria(0, 100);
mesher.set_criteria(criteria);
mesher.refine_mesh();
mark_domains(m_Delaunay);
LineSegs lineSegs;
for (auto e = m_Delaunay.finite_edges_begin();
e != m_Delaunay.finite_edges_end(); ++e)
{
Delaunay::Face_handle fn = e->first->neighbor(e->second);
//CGAL::Object o = m_Delaunay.dual(e);
if (!fn->is_in_domain() || !fn->info().in_domain())
{
continue;
}
if (!m_Delaunay.is_constrained(*e) && (!m_Delaunay.is_infinite(e->first))
&& (!m_Delaunay.is_infinite(e->first->neighbor(e->second))))
{
Delaunay::Segment s = m_Delaunay.geom_traits().construct_segment_2_object()
(m_Delaunay.circumcenter(e->first),
m_Delaunay.circumcenter(e->first->neighbor(e->second)));
const CgalInexactKernel::Segment_2* seg = &s;
CgalPoint p1(seg->source().hx(), seg->source().hy());
CgalPoint p2(seg->target().hx(), seg->target().hy());
Vector2 pp1(p1.hx(), p1.hy());
Vector2 pp2(p2.hx(), p2.hy());
if (pp1 == pp2)
{
continue;
}
lineSegs.push_back(LineSeg(pp1, pp2));
}
}
for (auto it = lineSegs.begin(); it != lineSegs.end(); ++it)
{
//m_PositionGraph.AddNewLine(it->beg, it->end, );
}
}
m_PositionGraph.ComputeJoints();
//printf("joints: %d\n", m_PositionGraph.m_Joints.size());
//MakeLines();
MakeGraphLines();
}
void CgalPatch::SetData(ImageSpline& is)
{
m_Inter.clear();
m_Outer.clear();
for (int i = 0; i < is.m_PatchSplines.size(); ++i)
{
insert_polygon(is, i);
}
for (int i = 0; i < is.m_PatchSplinesInter.size(); ++i)
{
insert_polygonInter(is, i);
}
}
int main() {
//construct two non-intersecting nested polygons
Polygon_2 polygon1;
polygon1.push_back(Point_2(0.0, 0.0));
polygon1.push_back(Point_2(2.0, 0.0));
polygon1.push_back(Point_2(1.7, 1.0));
polygon1.push_back(Point_2(2.0, 2.0));
polygon1.push_back(Point_2(0.0, 2.0));
Polygon_2 polygon2;
polygon2.push_back(Point_2(0.5, 0.5));
polygon2.push_back(Point_2(1.5, 0.5));
polygon2.push_back(Point_2(1.5, 1.5));
polygon2.push_back(Point_2(0.5, 1.5));
//Insert the polyons into a constrained triangulation
CDT cdt;
insert_polygon(cdt, polygon1);
insert_polygon(cdt, polygon2);
//Extract point and provide the an index
std::vector< triangulation_point > points ;
for ( CDT::Vertex_iterator it = cdt.vertices_begin(); it != cdt.vertices_end(); ++it ){
it->info() = points.size() ;
points.push_back( it->point() );
}
//Mark facets that are inside the domain bounded by the polygon
mark_domains(cdt);
//
int count = 0;
for (CDT::Finite_faces_iterator fit = cdt.finite_faces_begin(); fit != cdt.finite_faces_end(); ++fit) {
if (fit->info().in_domain()){
++count;
}
}
/*
* export
*/
std::ofstream ofs("polygon_triangulation2.obj");
if ( ! ofs.good() ){
std::cout << "can't open file" << std::endl;
return 1 ;
}
//-- print vertices
ofs << "# " << points.size() << " vertices"<< std::endl ;
for ( size_t i = 0; i < points.size(); i++ ){
ofs << "v " << points[i] << " 0.0" << std::endl;
}
//-- print faces
ofs << "# " << cdt.number_of_faces() << " faces"<< std::endl ;
// warning : Delaunay_triangulation_2::All_faces_iterator iterator over infinite faces
for ( CDT::Finite_faces_iterator it = cdt.finite_faces_begin(); it != cdt.finite_faces_end(); ++it )
{
//ignore holes
if ( ! it->info().in_domain() ){
continue ;
}
size_t ia = it->vertex(0)->info();
size_t ib = it->vertex(1)->info();
size_t ic = it->vertex(2)->info();
assert( it->is_valid() );
//assert ( ia < cdt.number_of_vertices() || ib < tri.number_of_vertices() || ic < tri.number_of_vertices() ) ;
ofs << "f " << ( ia + 1 ) << " " << ( ib + 1 ) << " " << ( ic + 1 ) << std::endl;
}
return 0;
}