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Ported regular_points() to XS and renamed it to equally_spaced_points()

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Alessandro Ranellucci 2013-11-11 20:59:58 +01:00
parent 6bb425e88d
commit 885ab5844e
8 changed files with 45 additions and 34 deletions
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31
xs/src/Polyline.cpp
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@ -49,6 +49,37 @@ Polyline::clip_start(double distance)
if (this->points.size() >= 2) this->reverse();
}
/* this method returns a collection of points picked on the polygon contour
so that they are evenly spaced according to the input distance */
Points
Polyline::equally_spaced_points(double distance) const
{
Points pts;
pts.push_back(*this->first_point());
double len = 0;
for (Points::const_iterator it = this->points.begin() + 1; it != this->points.end(); ++it) {
double segment_length = it->distance_to(&*(it-1));
len += segment_length;
if (len < distance) continue;
if (len == distance) {
pts.push_back(*it);
len = 0;
continue;
}
double take = segment_length - (len - distance); // how much we take of this segment
Line segment(*(it-1), *it);
pts.push_back(*segment.point_at(take));
it--;
len = -take;
}
return pts;
}
#ifdef SLIC3RXS
SV*
Polyline::to_SV_ref()