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Ported encloses_point() to XS and renamed to contains_point()

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This commit is contained in:
Alessandro Ranellucci 2013-11-21 16:21:42 +01:00
parent a225a8b2ef
commit 5f81292f3f
22 changed files with 81 additions and 76 deletions
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15
xs/src/Polygon.cpp
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@ -110,6 +110,21 @@ Polygon::is_valid() const
return this->points.size() >= 3;
}
bool
Polygon::contains_point(const Point* point) const
{
// http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
bool result;
Points::const_iterator i = this->points.begin();
Points::const_iterator j = this->points.end() - 1;
for (; i != this->points.end(); j = i++) {
if ( ((i->y > point->y) != (j->y > point->y))
&& (point->x < (j->x - i->x) * (point->y - i->y) / (j->y - i->y) + i->x) )
result = !result;
}
return result;
}
#ifdef SLIC3RXS
SV*
Polygon::to_SV_ref() {