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removed use of auxiliary vector to save runtime

This commit is contained in:
Francisc Bungiu 2013-09-06 19:08:10 +03:00
parent 535691662c
commit aab7aece16
1 changed files with 11 additions and 11 deletions
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22
Visibility_2/include/CGAL/Simple_polygon_visibility_2.h
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@ -102,20 +102,21 @@ public:
typename Input_arrangement_2::Ccb_halfedge_const_circulator circ =
face->outer_ccb();
typename Input_arrangement_2::Ccb_halfedge_const_circulator curr = circ;
typename Input_arrangement_2::Ccb_halfedge_const_circulator start = curr;
typename Input_arrangement_2::Halfedge_const_handle he = curr;
std::vector<Point_2> temp_vertices;
// std::cout << "start\n";
Point_2 min_intersect_pt;
bool intersect_on_endpoint = false;
Segment_2 curr_edge(he->source()->point(), he->target()->point());
Segment_2 curr_min_edge(he->source()->point(), he->target()->point());
Point_2 curr_vertex = he->target()->point();
temp_vertices.push_back(curr_vertex);
Number_type min_dist = CGAL::Visibility_2::compute_squared_distance_2
<Geometry_traits_2, Point_2, Segment_2>(geom_traits, q, curr_edge);
int min_dist_index = 0;
int index = 1;
curr++;
// Push all vertices and determine edge minimum in terms
// of squared distance to query point
do {
@ -128,8 +129,8 @@ public:
min_dist = curr_dist;
min_dist_index = index;
curr_min_edge = curr_edge;
start = curr;
}
temp_vertices.push_back(he->target()->point());
index++;
} while (++curr != circ);
@ -145,13 +146,12 @@ public:
else {
intersect_pt_on_seg_endpoint = true;
}
// Now create vector so that first vertex v0 is visible
for (unsigned int k = min_dist_index ; k < temp_vertices.size() ; k++) {
vertices.push_back(temp_vertices[k]);
}
for (unsigned int k = 0 ; k < min_dist_index ; k++) {
vertices.push_back(temp_vertices[k]);
}
curr = start;
do {
he = curr;
vertices.push_back(he->target()->point());
} while(++curr != start);
// Push first vertex again to fulfill algo precondition
if (min_intersect_pt != curr_min_edge.source() &&