57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
#include "PolylineCollection.hpp"
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namespace Slic3r {
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PolylineCollection*
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PolylineCollection::chained_path(bool no_reverse) const
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{
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if (this->polylines.empty()) return new PolylineCollection ();
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return this->chained_path_from(this->polylines.front().first_point(), no_reverse);
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}
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PolylineCollection*
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PolylineCollection::chained_path_from(const Point* start_near, bool no_reverse) const
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{
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PolylineCollection* retval = new PolylineCollection;
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Polylines my_paths = this->polylines;
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Points endpoints;
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for (Polylines::const_iterator it = my_paths.begin(); it != my_paths.end(); ++it) {
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endpoints.push_back(*(*it).first_point());
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if (no_reverse) {
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endpoints.push_back(*(*it).first_point());
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} else {
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endpoints.push_back(*(*it).last_point());
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}
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}
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while (!my_paths.empty()) {
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// find nearest point
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int start_index = start_near->nearest_point_index(endpoints);
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int path_index = start_index/2;
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if (start_index % 2 && !no_reverse) {
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my_paths.at(path_index).reverse();
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}
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retval->polylines.push_back(my_paths.at(path_index));
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my_paths.erase(my_paths.begin() + path_index);
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endpoints.erase(endpoints.begin() + 2*path_index, endpoints.begin() + 2*path_index + 2);
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start_near = retval->polylines.back().last_point();
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}
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return retval;
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}
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Point*
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PolylineCollection::leftmost_point() const
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{
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const Point* p = NULL;
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for (Polylines::const_iterator it = this->polylines.begin(); it != this->polylines.end(); ++it) {
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if (p == NULL || it->points.front().x < p->x)
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p = &(it->points.front());
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}
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if (p == NULL) return NULL;
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return new Point (*p);
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}
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}
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