375 lines
14 KiB
C++
375 lines
14 KiB
C++
#include "ExtrusionEntity.hpp"
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#include "ExtrusionEntityCollection.hpp"
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#include "ExPolygonCollection.hpp"
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#include "ClipperUtils.hpp"
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#include "Extruder.hpp"
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#include "Flow.hpp"
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#include <cmath>
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#include <limits>
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#include <sstream>
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#define L(s) (s)
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namespace Slic3r {
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void ExtrusionPath::intersect_expolygons(const ExPolygonCollection &collection, ExtrusionEntityCollection* retval) const
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{
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this->_inflate_collection(intersection_pl(Polylines{ polyline }, collection.expolygons), retval);
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}
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void ExtrusionPath::subtract_expolygons(const ExPolygonCollection &collection, ExtrusionEntityCollection* retval) const
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{
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this->_inflate_collection(diff_pl(Polylines{ this->polyline }, collection.expolygons), retval);
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}
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void ExtrusionPath::clip_end(double distance)
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{
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this->polyline.clip_end(distance);
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}
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void ExtrusionPath::simplify(double tolerance)
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{
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this->polyline.simplify(tolerance);
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}
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double ExtrusionPath::length() const
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{
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return this->polyline.length();
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}
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void ExtrusionPath::_inflate_collection(const Polylines &polylines, ExtrusionEntityCollection* collection) const
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{
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for (const Polyline &polyline : polylines)
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collection->entities.emplace_back(new ExtrusionPath(polyline, *this));
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}
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void ExtrusionPath::polygons_covered_by_width(Polygons &out, const float scaled_epsilon) const
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{
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polygons_append(out, offset(this->polyline, float(scale_(this->width/2)) + scaled_epsilon));
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}
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void ExtrusionPath::polygons_covered_by_spacing(Polygons &out, const float scaled_epsilon) const
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{
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// Instantiating the Flow class to get the line spacing.
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// Don't know the nozzle diameter, setting to zero. It shall not matter it shall be optimized out by the compiler.
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bool bridge = is_bridge(this->role());
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assert(! bridge || this->width == this->height);
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auto flow = bridge ? Flow::bridging_flow(this->width, 0.f) : Flow(this->width, this->height, 0.f);
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polygons_append(out, offset(this->polyline, 0.5f * float(flow.scaled_spacing()) + scaled_epsilon));
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}
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void ExtrusionMultiPath::reverse()
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{
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for (ExtrusionPath &path : this->paths)
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path.reverse();
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std::reverse(this->paths.begin(), this->paths.end());
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}
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double ExtrusionMultiPath::length() const
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{
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double len = 0;
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for (const ExtrusionPath &path : this->paths)
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len += path.polyline.length();
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return len;
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}
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void ExtrusionMultiPath::polygons_covered_by_width(Polygons &out, const float scaled_epsilon) const
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{
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for (const ExtrusionPath &path : this->paths)
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path.polygons_covered_by_width(out, scaled_epsilon);
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}
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void ExtrusionMultiPath::polygons_covered_by_spacing(Polygons &out, const float scaled_epsilon) const
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{
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for (const ExtrusionPath &path : this->paths)
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path.polygons_covered_by_spacing(out, scaled_epsilon);
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}
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double ExtrusionMultiPath::min_mm3_per_mm() const
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{
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double min_mm3_per_mm = std::numeric_limits<double>::max();
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for (const ExtrusionPath &path : this->paths)
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min_mm3_per_mm = std::min(min_mm3_per_mm, path.mm3_per_mm);
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return min_mm3_per_mm;
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}
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Polyline ExtrusionMultiPath::as_polyline() const
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{
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Polyline out;
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if (! paths.empty()) {
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size_t len = 0;
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for (size_t i_path = 0; i_path < paths.size(); ++ i_path) {
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assert(! paths[i_path].polyline.points.empty());
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assert(i_path == 0 || paths[i_path - 1].polyline.points.back() == paths[i_path].polyline.points.front());
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len += paths[i_path].polyline.points.size();
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}
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// The connecting points between the segments are equal.
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len -= paths.size() - 1;
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assert(len > 0);
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out.points.reserve(len);
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out.points.push_back(paths.front().polyline.points.front());
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for (size_t i_path = 0; i_path < paths.size(); ++ i_path)
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out.points.insert(out.points.end(), paths[i_path].polyline.points.begin() + 1, paths[i_path].polyline.points.end());
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}
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return out;
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}
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bool ExtrusionLoop::make_clockwise()
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{
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bool was_ccw = this->polygon().is_counter_clockwise();
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if (was_ccw) this->reverse();
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return was_ccw;
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}
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bool ExtrusionLoop::make_counter_clockwise()
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{
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bool was_cw = this->polygon().is_clockwise();
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if (was_cw) this->reverse();
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return was_cw;
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}
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void ExtrusionLoop::reverse()
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{
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for (ExtrusionPath &path : this->paths)
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path.reverse();
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std::reverse(this->paths.begin(), this->paths.end());
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}
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Polygon ExtrusionLoop::polygon() const
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{
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Polygon polygon;
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for (const ExtrusionPath &path : this->paths) {
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// for each polyline, append all points except the last one (because it coincides with the first one of the next polyline)
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polygon.points.insert(polygon.points.end(), path.polyline.points.begin(), path.polyline.points.end()-1);
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}
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return polygon;
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}
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double ExtrusionLoop::length() const
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{
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double len = 0;
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for (const ExtrusionPath &path : this->paths)
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len += path.polyline.length();
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return len;
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}
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bool ExtrusionLoop::split_at_vertex(const Point &point)
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{
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for (ExtrusionPaths::iterator path = this->paths.begin(); path != this->paths.end(); ++path) {
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int idx = path->polyline.find_point(point);
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if (idx != -1) {
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if (this->paths.size() == 1) {
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// just change the order of points
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path->polyline.points.insert(path->polyline.points.end(), path->polyline.points.begin() + 1, path->polyline.points.begin() + idx + 1);
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path->polyline.points.erase(path->polyline.points.begin(), path->polyline.points.begin() + idx);
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} else {
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// new paths list starts with the second half of current path
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ExtrusionPaths new_paths;
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new_paths.reserve(this->paths.size() + 1);
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{
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ExtrusionPath p = *path;
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p.polyline.points.erase(p.polyline.points.begin(), p.polyline.points.begin() + idx);
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if (p.polyline.is_valid()) new_paths.push_back(p);
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}
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// then we add all paths until the end of current path list
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new_paths.insert(new_paths.end(), path+1, this->paths.end()); // not including this path
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// then we add all paths since the beginning of current list up to the previous one
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new_paths.insert(new_paths.end(), this->paths.begin(), path); // not including this path
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// finally we add the first half of current path
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{
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ExtrusionPath p = *path;
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p.polyline.points.erase(p.polyline.points.begin() + idx + 1, p.polyline.points.end());
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if (p.polyline.is_valid()) new_paths.push_back(p);
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}
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// we can now override the old path list with the new one and stop looping
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std::swap(this->paths, new_paths);
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}
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return true;
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}
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}
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return false;
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}
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std::pair<size_t, Point> ExtrusionLoop::get_closest_path_and_point(const Point& point, bool prefer_non_overhang) const
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{
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// Find the closest path and closest point belonging to that path. Avoid overhangs, if asked for.
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size_t path_idx = 0;
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Point p;
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{
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double min = std::numeric_limits<double>::max();
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Point p_non_overhang;
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size_t path_idx_non_overhang = 0;
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double min_non_overhang = std::numeric_limits<double>::max();
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for (const ExtrusionPath& path : this->paths) {
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Point p_tmp = point.projection_onto(path.polyline);
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double dist = (p_tmp - point).cast<double>().norm();
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if (dist < min) {
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p = p_tmp;
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min = dist;
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path_idx = &path - &this->paths.front();
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}
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if (prefer_non_overhang && !is_bridge(path.role()) && dist < min_non_overhang) {
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p_non_overhang = p_tmp;
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min_non_overhang = dist;
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path_idx_non_overhang = &path - &this->paths.front();
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}
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}
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if (prefer_non_overhang && min_non_overhang != std::numeric_limits<double>::max()) {
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// Only apply the non-overhang point if there is one.
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path_idx = path_idx_non_overhang;
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p = p_non_overhang;
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}
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}
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return std::make_pair(path_idx, p);
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}
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// Splitting an extrusion loop, possibly made of multiple segments, some of the segments may be bridging.
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void ExtrusionLoop::split_at(const Point &point, bool prefer_non_overhang)
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{
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if (this->paths.empty())
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return;
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auto [path_idx, p] = get_closest_path_and_point(point, prefer_non_overhang);
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// now split path_idx in two parts
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const ExtrusionPath &path = this->paths[path_idx];
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ExtrusionPath p1(path.role(), path.mm3_per_mm, path.width, path.height);
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ExtrusionPath p2(path.role(), path.mm3_per_mm, path.width, path.height);
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path.polyline.split_at(p, &p1.polyline, &p2.polyline);
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if (this->paths.size() == 1) {
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if (! p1.polyline.is_valid())
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std::swap(this->paths.front().polyline.points, p2.polyline.points);
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else if (! p2.polyline.is_valid())
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std::swap(this->paths.front().polyline.points, p1.polyline.points);
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else {
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p2.polyline.points.insert(p2.polyline.points.end(), p1.polyline.points.begin() + 1, p1.polyline.points.end());
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std::swap(this->paths.front().polyline.points, p2.polyline.points);
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}
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} else {
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// install the two paths
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this->paths.erase(this->paths.begin() + path_idx);
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if (p2.polyline.is_valid()) this->paths.insert(this->paths.begin() + path_idx, p2);
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if (p1.polyline.is_valid()) this->paths.insert(this->paths.begin() + path_idx, p1);
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}
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// split at the new vertex
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this->split_at_vertex(p);
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}
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void ExtrusionLoop::clip_end(double distance, ExtrusionPaths* paths) const
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{
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*paths = this->paths;
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while (distance > 0 && !paths->empty()) {
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ExtrusionPath &last = paths->back();
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double len = last.length();
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if (len <= distance) {
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paths->pop_back();
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distance -= len;
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} else {
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last.polyline.clip_end(distance);
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break;
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}
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}
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}
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bool ExtrusionLoop::has_overhang_point(const Point &point) const
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{
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for (const ExtrusionPath &path : this->paths) {
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int pos = path.polyline.find_point(point);
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if (pos != -1) {
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// point belongs to this path
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// we consider it overhang only if it's not an endpoint
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return (is_bridge(path.role()) && pos > 0 && pos != (int)(path.polyline.points.size())-1);
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}
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}
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return false;
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}
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void ExtrusionLoop::polygons_covered_by_width(Polygons &out, const float scaled_epsilon) const
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{
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for (const ExtrusionPath &path : this->paths)
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path.polygons_covered_by_width(out, scaled_epsilon);
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}
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void ExtrusionLoop::polygons_covered_by_spacing(Polygons &out, const float scaled_epsilon) const
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{
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for (const ExtrusionPath &path : this->paths)
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path.polygons_covered_by_spacing(out, scaled_epsilon);
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}
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double ExtrusionLoop::min_mm3_per_mm() const
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{
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double min_mm3_per_mm = std::numeric_limits<double>::max();
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for (const ExtrusionPath &path : this->paths)
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min_mm3_per_mm = std::min(min_mm3_per_mm, path.mm3_per_mm);
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return min_mm3_per_mm;
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}
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std::string ExtrusionEntity::role_to_string(ExtrusionRole role)
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{
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switch (role) {
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case erNone : return L("Unknown");
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case erPerimeter : return L("Perimeter");
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case erExternalPerimeter : return L("External perimeter");
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case erOverhangPerimeter : return L("Overhang perimeter");
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case erInternalInfill : return L("Internal infill");
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case erSolidInfill : return L("Solid infill");
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case erTopSolidInfill : return L("Top solid infill");
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case erIroning : return L("Ironing");
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case erBridgeInfill : return L("Bridge infill");
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case erGapFill : return L("Gap fill");
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case erSkirt : return L("Skirt/Brim");
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case erSupportMaterial : return L("Support material");
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case erSupportMaterialInterface : return L("Support material interface");
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case erWipeTower : return L("Wipe tower");
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case erCustom : return L("Custom");
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case erMixed : return L("Mixed");
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default : assert(false);
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}
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return "";
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}
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ExtrusionRole ExtrusionEntity::string_to_role(const std::string_view role)
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{
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if (role == L("Perimeter"))
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return erPerimeter;
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else if (role == L("External perimeter"))
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return erExternalPerimeter;
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else if (role == L("Overhang perimeter"))
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return erOverhangPerimeter;
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else if (role == L("Internal infill"))
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return erInternalInfill;
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else if (role == L("Solid infill"))
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return erSolidInfill;
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else if (role == L("Top solid infill"))
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return erTopSolidInfill;
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else if (role == L("Ironing"))
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return erIroning;
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else if (role == L("Bridge infill"))
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return erBridgeInfill;
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else if (role == L("Gap fill"))
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return erGapFill;
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else if (role == L("Skirt") || role == L("Skirt/Brim")) // "Skirt" is for backward compatibility with 2.3.1 and earlier
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return erSkirt;
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else if (role == L("Support material"))
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return erSupportMaterial;
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else if (role == L("Support material interface"))
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return erSupportMaterialInterface;
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else if (role == L("Wipe tower"))
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return erWipeTower;
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else if (role == L("Custom"))
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return erCustom;
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else if (role == L("Mixed"))
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return erMixed;
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else
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return erNone;
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}
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}
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