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345 lines
20 KiB
C++
345 lines
20 KiB
C++
#ifndef slic3r_ExtrusionEntity_hpp_
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#define slic3r_ExtrusionEntity_hpp_
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#include "libslic3r.h"
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#include "ExtrusionRole.hpp"
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#include "Polygon.hpp"
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#include "Polyline.hpp"
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#include <assert.h>
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#include <string_view>
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#include <numeric>
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namespace Slic3r {
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class ExPolygon;
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using ExPolygons = std::vector<ExPolygon>;
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class ExtrusionEntityCollection;
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class Extruder;
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class ExtrusionEntity
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{
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public:
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virtual ExtrusionRole role() const = 0;
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virtual bool is_collection() const { return false; }
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virtual bool is_loop() const { return false; }
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virtual bool can_reverse() const { return true; }
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virtual ExtrusionEntity* clone() const = 0;
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// Create a new object, initialize it with this object using the move semantics.
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virtual ExtrusionEntity* clone_move() = 0;
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virtual ~ExtrusionEntity() = default;
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virtual void reverse() = 0;
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virtual const Point& first_point() const = 0;
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virtual const Point& last_point() const = 0;
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// Returns an approximately middle point of a path, loop or an extrusion collection.
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// Used to get a sample point of an extrusion or extrusion collection, which is possibly deep inside its island.
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virtual const Point& middle_point() const = 0;
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// Produce a list of 2D polygons covered by the extruded paths, offsetted by the extrusion width.
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// Increase the offset by scaled_epsilon to achieve an overlap, so a union will produce no gaps.
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virtual void polygons_covered_by_width(Polygons &out, const float scaled_epsilon) const = 0;
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// Produce a list of 2D polygons covered by the extruded paths, offsetted by the extrusion spacing.
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// Increase the offset by scaled_epsilon to achieve an overlap, so a union will produce no gaps.
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// Useful to calculate area of an infill, which has been really filled in by a 100% rectilinear infill.
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virtual void polygons_covered_by_spacing(Polygons &out, const float scaled_epsilon) const = 0;
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Polygons polygons_covered_by_width(const float scaled_epsilon = 0.f) const
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{ Polygons out; this->polygons_covered_by_width(out, scaled_epsilon); return out; }
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Polygons polygons_covered_by_spacing(const float scaled_epsilon = 0.f) const
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{ Polygons out; this->polygons_covered_by_spacing(out, scaled_epsilon); return out; }
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// Minimum volumetric velocity of this extrusion entity. Used by the constant nozzle pressure algorithm.
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virtual double min_mm3_per_mm() const = 0;
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virtual Polyline as_polyline() const = 0;
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virtual void collect_polylines(Polylines &dst) const = 0;
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virtual void collect_points(Points &dst) const = 0;
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virtual Polylines as_polylines() const { Polylines dst; this->collect_polylines(dst); return dst; }
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virtual double length() const = 0;
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virtual double total_volume() const = 0;
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};
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typedef std::vector<ExtrusionEntity*> ExtrusionEntitiesPtr;
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class ExtrusionPath : public ExtrusionEntity
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{
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public:
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Polyline polyline;
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// Volumetric velocity. mm^3 of plastic per mm of linear head motion. Used by the G-code generator.
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double mm3_per_mm;
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// Width of the extrusion, used for visualization purposes.
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float width;
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// Height of the extrusion, used for visualization purposes.
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float height;
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ExtrusionPath(ExtrusionRole role) : mm3_per_mm(-1), width(-1), height(-1), m_role(role) {}
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ExtrusionPath(ExtrusionRole role, double mm3_per_mm, float width, float height) : mm3_per_mm(mm3_per_mm), width(width), height(height), m_role(role) {}
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ExtrusionPath(const ExtrusionPath& rhs) : polyline(rhs.polyline), mm3_per_mm(rhs.mm3_per_mm), width(rhs.width), height(rhs.height), m_role(rhs.m_role) {}
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ExtrusionPath(ExtrusionPath&& rhs) : polyline(std::move(rhs.polyline)), mm3_per_mm(rhs.mm3_per_mm), width(rhs.width), height(rhs.height), m_role(rhs.m_role) {}
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ExtrusionPath(const Polyline &polyline, const ExtrusionPath &rhs) : polyline(polyline), mm3_per_mm(rhs.mm3_per_mm), width(rhs.width), height(rhs.height), m_role(rhs.m_role) {}
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ExtrusionPath(Polyline &&polyline, const ExtrusionPath &rhs) : polyline(std::move(polyline)), mm3_per_mm(rhs.mm3_per_mm), width(rhs.width), height(rhs.height), m_role(rhs.m_role) {}
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ExtrusionPath& operator=(const ExtrusionPath& rhs) { m_role = rhs.m_role; this->mm3_per_mm = rhs.mm3_per_mm; this->width = rhs.width; this->height = rhs.height; this->polyline = rhs.polyline; return *this; }
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ExtrusionPath& operator=(ExtrusionPath&& rhs) { m_role = rhs.m_role; this->mm3_per_mm = rhs.mm3_per_mm; this->width = rhs.width; this->height = rhs.height; this->polyline = std::move(rhs.polyline); return *this; }
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ExtrusionEntity* clone() const override { return new ExtrusionPath(*this); }
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// Create a new object, initialize it with this object using the move semantics.
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ExtrusionEntity* clone_move() override { return new ExtrusionPath(std::move(*this)); }
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void reverse() override { this->polyline.reverse(); }
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const Point& first_point() const override { return this->polyline.points.front(); }
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const Point& last_point() const override { return this->polyline.points.back(); }
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const Point& middle_point() const override { return this->polyline.points[this->polyline.size() / 2]; }
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size_t size() const { return this->polyline.size(); }
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bool empty() const { return this->polyline.empty(); }
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bool is_closed() const { return ! this->empty() && this->polyline.points.front() == this->polyline.points.back(); }
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// Produce a list of extrusion paths into retval by clipping this path by ExPolygons.
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// Currently not used.
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void intersect_expolygons(const ExPolygons &collection, ExtrusionEntityCollection* retval) const;
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// Produce a list of extrusion paths into retval by removing parts of this path by ExPolygons.
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// Currently not used.
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void subtract_expolygons(const ExPolygons &collection, ExtrusionEntityCollection* retval) const;
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void clip_end(double distance);
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void simplify(double tolerance);
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double length() const override;
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ExtrusionRole role() const override { return m_role; }
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// Produce a list of 2D polygons covered by the extruded paths, offsetted by the extrusion width.
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// Increase the offset by scaled_epsilon to achieve an overlap, so a union will produce no gaps.
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void polygons_covered_by_width(Polygons &out, const float scaled_epsilon) const override;
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// Produce a list of 2D polygons covered by the extruded paths, offsetted by the extrusion spacing.
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// Increase the offset by scaled_epsilon to achieve an overlap, so a union will produce no gaps.
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// Useful to calculate area of an infill, which has been really filled in by a 100% rectilinear infill.
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void polygons_covered_by_spacing(Polygons &out, const float scaled_epsilon) const override;
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Polygons polygons_covered_by_width(const float scaled_epsilon = 0.f) const
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{ Polygons out; this->polygons_covered_by_width(out, scaled_epsilon); return out; }
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Polygons polygons_covered_by_spacing(const float scaled_epsilon = 0.f) const
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{ Polygons out; this->polygons_covered_by_spacing(out, scaled_epsilon); return out; }
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// Minimum volumetric velocity of this extrusion entity. Used by the constant nozzle pressure algorithm.
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double min_mm3_per_mm() const override { return this->mm3_per_mm; }
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Polyline as_polyline() const override { return this->polyline; }
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void collect_polylines(Polylines &dst) const override { if (! this->polyline.empty()) dst.emplace_back(this->polyline); }
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void collect_points(Points &dst) const override { append(dst, this->polyline.points); }
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double total_volume() const override { return mm3_per_mm * unscale<double>(length()); }
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private:
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void _inflate_collection(const Polylines &polylines, ExtrusionEntityCollection* collection) const;
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ExtrusionRole m_role;
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};
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class ExtrusionPathOriented : public ExtrusionPath
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{
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public:
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ExtrusionPathOriented(ExtrusionRole role, double mm3_per_mm, float width, float height) : ExtrusionPath(role, mm3_per_mm, width, height) {}
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ExtrusionEntity* clone() const override { return new ExtrusionPathOriented(*this); }
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// Create a new object, initialize it with this object using the move semantics.
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ExtrusionEntity* clone_move() override { return new ExtrusionPathOriented(std::move(*this)); }
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virtual bool can_reverse() const override { return false; }
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};
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typedef std::vector<ExtrusionPath> ExtrusionPaths;
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// Single continuous extrusion path, possibly with varying extrusion thickness, extrusion height or bridging / non bridging.
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class ExtrusionMultiPath : public ExtrusionEntity
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{
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public:
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ExtrusionPaths paths;
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ExtrusionMultiPath() {}
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ExtrusionMultiPath(const ExtrusionMultiPath &rhs) : paths(rhs.paths) {}
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ExtrusionMultiPath(ExtrusionMultiPath &&rhs) : paths(std::move(rhs.paths)) {}
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ExtrusionMultiPath(const ExtrusionPaths &paths) : paths(paths) {}
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ExtrusionMultiPath(const ExtrusionPath &path) { this->paths.push_back(path); }
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ExtrusionMultiPath& operator=(const ExtrusionMultiPath &rhs) { this->paths = rhs.paths; return *this; }
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ExtrusionMultiPath& operator=(ExtrusionMultiPath &&rhs) { this->paths = std::move(rhs.paths); return *this; }
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bool is_loop() const override { return false; }
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bool can_reverse() const override { return true; }
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ExtrusionEntity* clone() const override { return new ExtrusionMultiPath(*this); }
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// Create a new object, initialize it with this object using the move semantics.
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ExtrusionEntity* clone_move() override { return new ExtrusionMultiPath(std::move(*this)); }
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void reverse() override;
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const Point& first_point() const override { return this->paths.front().polyline.points.front(); }
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const Point& last_point() const override { return this->paths.back().polyline.points.back(); }
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const Point& middle_point() const override { auto &path = this->paths[this->paths.size() / 2]; return path.polyline.points[path.polyline.size() / 2]; }
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size_t size() const { return this->paths.size(); }
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bool empty() const { return this->paths.empty(); }
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double length() const override;
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ExtrusionRole role() const override { return this->paths.empty() ? ExtrusionRole::None : this->paths.front().role(); }
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// Produce a list of 2D polygons covered by the extruded paths, offsetted by the extrusion width.
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// Increase the offset by scaled_epsilon to achieve an overlap, so a union will produce no gaps.
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void polygons_covered_by_width(Polygons &out, const float scaled_epsilon) const override;
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// Produce a list of 2D polygons covered by the extruded paths, offsetted by the extrusion spacing.
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// Increase the offset by scaled_epsilon to achieve an overlap, so a union will produce no gaps.
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// Useful to calculate area of an infill, which has been really filled in by a 100% rectilinear infill.
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void polygons_covered_by_spacing(Polygons &out, const float scaled_epsilon) const override;
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Polygons polygons_covered_by_width(const float scaled_epsilon = 0.f) const
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{ Polygons out; this->polygons_covered_by_width(out, scaled_epsilon); return out; }
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Polygons polygons_covered_by_spacing(const float scaled_epsilon = 0.f) const
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{ Polygons out; this->polygons_covered_by_spacing(out, scaled_epsilon); return out; }
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// Minimum volumetric velocity of this extrusion entity. Used by the constant nozzle pressure algorithm.
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double min_mm3_per_mm() const override;
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Polyline as_polyline() const override;
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void collect_polylines(Polylines &dst) const override { Polyline pl = this->as_polyline(); if (! pl.empty()) dst.emplace_back(std::move(pl)); }
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void collect_points(Points &dst) const override {
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size_t n = std::accumulate(paths.begin(), paths.end(), 0, [](const size_t n, const ExtrusionPath &p){ return n + p.polyline.size(); });
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dst.reserve(dst.size() + n);
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for (const ExtrusionPath &p : this->paths)
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append(dst, p.polyline.points);
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}
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double total_volume() const override { double volume =0.; for (const auto& path : paths) volume += path.total_volume(); return volume; }
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};
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// Single continuous extrusion loop, possibly with varying extrusion thickness, extrusion height or bridging / non bridging.
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class ExtrusionLoop : public ExtrusionEntity
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{
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public:
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ExtrusionPaths paths;
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ExtrusionLoop(ExtrusionLoopRole role = elrDefault) : m_loop_role(role) {}
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ExtrusionLoop(const ExtrusionPaths &paths, ExtrusionLoopRole role = elrDefault) : paths(paths), m_loop_role(role) {}
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ExtrusionLoop(ExtrusionPaths &&paths, ExtrusionLoopRole role = elrDefault) : paths(std::move(paths)), m_loop_role(role) {}
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ExtrusionLoop(const ExtrusionPath &path, ExtrusionLoopRole role = elrDefault) : m_loop_role(role)
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{ this->paths.push_back(path); }
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ExtrusionLoop(ExtrusionPath &&path, ExtrusionLoopRole role = elrDefault) : m_loop_role(role)
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{ this->paths.emplace_back(std::move(path)); }
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bool is_loop() const override{ return true; }
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bool can_reverse() const override { return false; }
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ExtrusionEntity* clone() const override{ return new ExtrusionLoop (*this); }
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// Create a new object, initialize it with this object using the move semantics.
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ExtrusionEntity* clone_move() override { return new ExtrusionLoop(std::move(*this)); }
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bool make_clockwise();
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bool make_counter_clockwise();
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void reverse() override;
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const Point& first_point() const override { return this->paths.front().polyline.points.front(); }
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const Point& last_point() const override { assert(this->first_point() == this->paths.back().polyline.points.back()); return this->first_point(); }
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const Point& middle_point() const override { auto& path = this->paths[this->paths.size() / 2]; return path.polyline.points[path.polyline.size() / 2]; }
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Polygon polygon() const;
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double length() const override;
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bool split_at_vertex(const Point &point, const double scaled_epsilon = scaled<double>(0.001));
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void split_at(const Point &point, bool prefer_non_overhang, const double scaled_epsilon = scaled<double>(0.001));
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struct ClosestPathPoint {
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size_t path_idx;
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size_t segment_idx;
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Point foot_pt;
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};
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ClosestPathPoint get_closest_path_and_point(const Point& point, bool prefer_non_overhang) const;
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void clip_end(double distance, ExtrusionPaths* paths) const;
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// Test, whether the point is extruded by a bridging flow.
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// This used to be used to avoid placing seams on overhangs, but now the EdgeGrid is used instead.
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bool has_overhang_point(const Point &point) const;
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ExtrusionRole role() const override { return this->paths.empty() ? ExtrusionRole::None : this->paths.front().role(); }
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ExtrusionLoopRole loop_role() const { return m_loop_role; }
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// Produce a list of 2D polygons covered by the extruded paths, offsetted by the extrusion width.
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// Increase the offset by scaled_epsilon to achieve an overlap, so a union will produce no gaps.
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void polygons_covered_by_width(Polygons &out, const float scaled_epsilon) const override;
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// Produce a list of 2D polygons covered by the extruded paths, offsetted by the extrusion spacing.
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// Increase the offset by scaled_epsilon to achieve an overlap, so a union will produce no gaps.
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// Useful to calculate area of an infill, which has been really filled in by a 100% rectilinear infill.
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void polygons_covered_by_spacing(Polygons &out, const float scaled_epsilon) const override;
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Polygons polygons_covered_by_width(const float scaled_epsilon = 0.f) const
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{ Polygons out; this->polygons_covered_by_width(out, scaled_epsilon); return out; }
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Polygons polygons_covered_by_spacing(const float scaled_epsilon = 0.f) const
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{ Polygons out; this->polygons_covered_by_spacing(out, scaled_epsilon); return out; }
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// Minimum volumetric velocity of this extrusion entity. Used by the constant nozzle pressure algorithm.
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double min_mm3_per_mm() const override;
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Polyline as_polyline() const override { return this->polygon().split_at_first_point(); }
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void collect_polylines(Polylines &dst) const override { Polyline pl = this->as_polyline(); if (! pl.empty()) dst.emplace_back(std::move(pl)); }
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void collect_points(Points &dst) const override {
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size_t n = std::accumulate(paths.begin(), paths.end(), 0, [](const size_t n, const ExtrusionPath &p){ return n + p.polyline.size(); });
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dst.reserve(dst.size() + n);
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for (const ExtrusionPath &p : this->paths)
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append(dst, p.polyline.points);
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}
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double total_volume() const override { double volume =0.; for (const auto& path : paths) volume += path.total_volume(); return volume; }
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#ifndef NDEBUG
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bool validate() const {
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assert(this->first_point() == this->paths.back().polyline.points.back());
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for (size_t i = 1; i < paths.size(); ++ i)
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assert(this->paths[i - 1].polyline.points.back() == this->paths[i].polyline.points.front());
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return true;
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}
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#endif /* NDEBUG */
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private:
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ExtrusionLoopRole m_loop_role;
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};
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inline void extrusion_paths_append(ExtrusionPaths &dst, Polylines &polylines, ExtrusionRole role, double mm3_per_mm, float width, float height)
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{
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dst.reserve(dst.size() + polylines.size());
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for (Polyline &polyline : polylines)
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if (polyline.is_valid()) {
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dst.push_back(ExtrusionPath(role, mm3_per_mm, width, height));
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dst.back().polyline = polyline;
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}
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}
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inline void extrusion_paths_append(ExtrusionPaths &dst, Polylines &&polylines, ExtrusionRole role, double mm3_per_mm, float width, float height)
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{
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dst.reserve(dst.size() + polylines.size());
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for (Polyline &polyline : polylines)
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if (polyline.is_valid()) {
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dst.push_back(ExtrusionPath(role, mm3_per_mm, width, height));
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dst.back().polyline = std::move(polyline);
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}
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polylines.clear();
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}
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inline void extrusion_entities_append_paths(ExtrusionEntitiesPtr &dst, const Polylines &polylines, ExtrusionRole role, double mm3_per_mm, float width, float height, bool can_reverse = true)
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{
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dst.reserve(dst.size() + polylines.size());
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for (const Polyline &polyline : polylines)
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if (polyline.is_valid()) {
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ExtrusionPath* extrusion_path = can_reverse ? new ExtrusionPath(role, mm3_per_mm, width, height) : new ExtrusionPathOriented(role, mm3_per_mm, width, height);
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dst.push_back(extrusion_path);
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extrusion_path->polyline = polyline;
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}
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}
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inline void extrusion_entities_append_paths(ExtrusionEntitiesPtr &dst, Polylines &&polylines, ExtrusionRole role, double mm3_per_mm, float width, float height, bool can_reverse = true)
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{
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dst.reserve(dst.size() + polylines.size());
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for (Polyline &polyline : polylines)
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if (polyline.is_valid()) {
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ExtrusionPath *extrusion_path = can_reverse ? new ExtrusionPath(role, mm3_per_mm, width, height) : new ExtrusionPathOriented(role, mm3_per_mm, width, height);
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dst.push_back(extrusion_path);
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extrusion_path->polyline = std::move(polyline);
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}
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polylines.clear();
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}
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inline void extrusion_entities_append_loops(ExtrusionEntitiesPtr &dst, Polygons &&loops, ExtrusionRole role, double mm3_per_mm, float width, float height)
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{
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dst.reserve(dst.size() + loops.size());
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for (Polygon &poly : loops) {
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if (poly.is_valid()) {
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ExtrusionPath path(role, mm3_per_mm, width, height);
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path.polyline.points = std::move(poly.points);
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path.polyline.points.push_back(path.polyline.points.front());
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dst.emplace_back(new ExtrusionLoop(std::move(path)));
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}
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}
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loops.clear();
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}
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inline void extrusion_entities_append_loops_and_paths(ExtrusionEntitiesPtr &dst, Polylines &&polylines, ExtrusionRole role, double mm3_per_mm, float width, float height)
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{
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dst.reserve(dst.size() + polylines.size());
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for (Polyline &polyline : polylines) {
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if (polyline.is_valid()) {
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if (polyline.is_closed()) {
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ExtrusionPath extrusion_path(role, mm3_per_mm, width, height);
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extrusion_path.polyline = std::move(polyline);
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dst.emplace_back(new ExtrusionLoop(std::move(extrusion_path)));
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} else {
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ExtrusionPath *extrusion_path = new ExtrusionPath(role, mm3_per_mm, width, height);
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extrusion_path->polyline = std::move(polyline);
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dst.emplace_back(extrusion_path);
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}
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}
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}
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polylines.clear();
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}
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}
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#endif
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