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Turn ExtrusionLoop into a collection of polylines. Includes some changes to the Polygon API to avoid returning newly allocatd objects

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This commit is contained in:
Alessandro Ranellucci 2014-05-07 12:02:09 +02:00
parent c72dc13d7e
commit d2d885fc53
11 changed files with 107 additions and 72 deletions
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13
xs/src/Polyline.cpp
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@ -89,11 +89,10 @@ Polyline::extend_start(double distance)
/* 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
void
Polyline::equally_spaced_points(double distance, Points* points) const
{
Points pts;
pts.push_back(this->first_point());
points->push_back(this->first_point());
double len = 0;
for (Points::const_iterator it = this->points.begin() + 1; it != this->points.end(); ++it) {
@ -102,19 +101,17 @@ Polyline::equally_spaced_points(double distance) const
if (len < distance) continue;
if (len == distance) {
pts.push_back(*it);
points->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));
points->push_back(segment.point_at(take));
it--;
len = -take;
}
return pts;
}
void