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Minor optimizations

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This commit is contained in:
Alessandro Ranellucci 2013-09-13 15:19:15 +02:00
parent 6e22a82e7d
commit 4dce461aaf
8 changed files with 31 additions and 30 deletions
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28
xs/src/Polygon.cpp
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@ -15,40 +15,40 @@ Lines
Polygon::lines() const
{
Lines lines;
for (int i = 0; i < this->points.size()-1; i++) {
lines.push_back(Line(this->points[i], this->points[i+1]));
lines.reserve(this->points.size());
for (Points::const_iterator it = this->points.begin(); it != this->points.end()-1; ++it) {
lines.push_back(Line(*it, *(it + 1)));
}
lines.push_back(Line(this->points.back(), this->points.front()));
return lines;
}
Polyline*
Polygon::split_at(const Point* point)
Polygon::split_at(const Point* point) const
{
// find index of point
for (Points::const_iterator it = this->points.begin(); it != this->points.end(); ++it) {
if ((*it).coincides_with(point)) {
if (it->coincides_with(point))
return this->split_at_index(it - this->points.begin());
}
}
throw "Point not found";
CONFESS("Point not found");
return NULL;
}
Polyline*
Polygon::split_at_index(int index)
Polygon::split_at_index(int index) const
{
Polyline* poly = new Polyline;
for (int i = index; i < this->points.size(); i++) {
poly->points.push_back( this->points[i] );
}
for (int i = 0; i <= index; i++) {
poly->points.push_back( this->points[i] );
}
poly->points.reserve(this->points.size() + 1);
for (Points::const_iterator it = this->points.begin() + index; it != this->points.end(); ++it)
poly->points.push_back(*it);
for (Points::const_iterator it = this->points.begin(); it != this->points.begin() + index + 1; ++it)
poly->points.push_back(*it);
return poly;
}
Polyline*
Polygon::split_at_first_point()
Polygon::split_at_first_point() const
{
return this->split_at_index(0);
}