void
arrangement::keep_arc(Arrangement_2::Edge_iterator &e, Arrangement_2 ©, Walk_pl &walk_pl)
{
e->set_data("none");
Conic_point_2 p;
// if it is a segment
if (e->curve().orientation() == CGAL::COLLINEAR)
{
Conic_point_2 source = e->curve().source();
Conic_point_2 target = e->curve().target();
double x = CGAL::to_double((target.x() + source.x()) /2);
double y = CGAL::to_double((target.y() + source.y()) /2);
Rational x_(x);
Rational y_(y);
p = Conic_point_2(x_,y_);
}
else // if it is an arc
{
int n = 2;
approximated_point_2* points = new approximated_point_2[n + 1];
e->curve().polyline_approximation(n, points); // there is 3 points
p = Conic_point_2(Rational(points[1].first),Rational(points[1].second));
}
Arrangement_2::Vertex_handle v = insert_point(copy, p, walk_pl);
try
{
if (v->face()->data() != 1)
nonCriticalRegions.remove_edge(e, false, false);
copy.remove_isolated_vertex(v);
}
catch (const std::exception exn) {}
}
void
arrangement::compute_pointInCells(Arrangement_2 &arr, std::vector<std::vector<double> > &points)
{
Walk_pl walk_pl(arr);
int cpt = 0;
for (Arrangement_2::Face_iterator face = arr.faces_begin(); face != arr.faces_end(); ++face)
{
if (face->is_unbounded())
face->set_data(-1);
else
{
// set data to each face
face->set_data(cpt++);
// find a point in this face
Arrangement_2::Ccb_halfedge_circulator previous = face->outer_ccb();
Arrangement_2::Ccb_halfedge_circulator first_edge = face->outer_ccb();
Arrangement_2::Ccb_halfedge_circulator edge = face->outer_ccb();
++edge;
do
{
std::vector<double> p1 = getPointMiddle(previous);
std::vector<double> p2 = getPointMiddle(edge);
std::vector<double> m;
m.push_back((p1[0]+p2[0])/2);
m.push_back((p1[1]+p2[1])/2);
Rational x_(m[0]);
Rational y_(m[1]);
Conic_point_2 p(x_,y_);
Arrangement_2::Vertex_handle v = insert_point(arr, p, walk_pl);
try
{
if (v->face()->data() == (cpt-1))
{
bool flag = false;
// test if it is not in holes and not in unbounded face
for (int i = 0; i < (int) convolutions_o.size(); ++i)
{
Walk_pl wpl(convolutions_o[i]);
Arrangement_2::Vertex_handle t = insert_point(convolutions_o[i], p, wpl);
if (t->face()->data() == 1)
{
convolutions_o[i].remove_isolated_vertex(t);
break;
}
else if (t->face()->data() == 2 || t->face()->data() == 0)
{
flag = true;
convolutions_o[i].remove_isolated_vertex(t);
break;
}
}
// then continue
if (!flag)
points.push_back(m);
else
{
--cpt;
face->set_data(-1);
}
arr.remove_isolated_vertex(v);
break;
}
arr.remove_isolated_vertex(v);
}
catch (const std::exception exn) {}
previous = edge;
++edge;
} while (edge != first_edge);
}
}
}
