void
PolyItem::compute_bounding_box () const
{
- bool have_one = false;
- Rect bbox;
+
+ if (!_points.empty()) {
- for (Points::const_iterator i = _points.begin(); i != _points.end(); ++i) {
- if (have_one) {
+ Rect bbox;
+ Points::const_iterator i = _points.begin();
+
+ bbox.x0 = bbox.x1 = i->x;
+ bbox.y0 = bbox.y1 = i->y;
+
+ while (i != _points.end()) {
bbox.x0 = min (bbox.x0, i->x);
bbox.y0 = min (bbox.y0, i->y);
bbox.x1 = max (bbox.x1, i->x);
bbox.y1 = max (bbox.y1, i->y);
- } else {
- bbox.x0 = bbox.x1 = i->x;
- bbox.y0 = bbox.y1 = i->y;
- have_one = true;
+ ++i;
}
- }
+ _bounding_box = bbox.expand (_outline_width / 2);
- if (!have_one) {
- _bounding_box = boost::optional<Rect> ();
+
} else {
- _bounding_box = bbox.expand (_outline_width / 2);
+ _bounding_box = boost::optional<Rect> ();
}
_bounding_box_dirty = false;