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faster drawing with horizontal segment parabola 

Signed-off-by: Panagiotis Cheilaris <philaris@cs.ntua.gr>
This commit is contained in:
Panagiotis Cheilaris 2013-02-22 17:03:59 +01:00
parent 1df026fd56
commit 1cb71db25d
1 changed files with 9 additions and 16 deletions
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25
Segment_Delaunay_graph_Linf_2/include/CGAL/Segment_Delaunay_graph_Linf_2/Constructions_C2.h
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@ -945,22 +945,16 @@ public:
FT half = FT(0.5);
FT seglenhalf ( half * CGAL::abs(pnt.y()-pver.y()) );
//positive side is left-turn
if (lseg.has_on_positive_side(pnt)) {
points[1]= (compare_x_2(seg.source(),seg.target())==SMALLER)
? Point_2(m.x() + seglenhalf, m.y())
: Point_2(m.x() - seglenhalf, m.y());
points[2]= (compare_x_2(seg.source(),seg.target())==SMALLER)
? Point_2(m.x() - seglenhalf, m.y())
: Point_2(m.x() + seglenhalf, m.y());
} else {//pnt is on the negative side of lseg i.e right turn
points[1]= (compare_x_2(seg.source(),seg.target())==SMALLER)
? Point_2(m.x() - seglenhalf, m.y())
: Point_2(m.x() + seglenhalf, m.y());
points[2]= (compare_x_2(seg.source(),seg.target())==SMALLER)
? Point_2(m.x() + seglenhalf, m.y())
: Point_2(m.x() - seglenhalf, m.y());
Comparison_result cmp = compare_y_2(pnt, pver);
if (cmp == LARGER) {
points[1] = Point_2(m.x() + seglenhalf, m.y());
points[2] = Point_2(m.x() - seglenhalf, m.y());
} else {
CGAL_assertion(cmp == SMALLER);
points[1] = Point_2(m.x() - seglenhalf, m.y());
points[2] = Point_2(m.x() + seglenhalf, m.y());
}
if (p.is_segment()) {
std::swap(points[1], points[2]);
}
@ -1012,7 +1006,6 @@ public:
FT seglenhalf ( half * CGAL::abs(pnt.x()-phor.x()) );
npts = 4;
Compare_y_2 compare_y_2;
if (lseg.has_on_positive_side(pnt)) {
points[1]= (compare_y_2(seg.source(),seg.target())==SMALLER)