WIP: Moved sources int src/, separated most of the source code from Perl.

The XS was left only for the unit / integration tests, and it links
libslic3r only. No wxWidgets are allowed to be used from Perl starting
from now.

src/libslic3r/Polyline.hpp

@@ -0,0 +1,157 @@
+#ifndef slic3r_Polyline_hpp_
+#define slic3r_Polyline_hpp_
+
+#include "libslic3r.h"
+#include "Line.hpp"
+#include "MultiPoint.hpp"
+#include <string>
+#include <vector>
+
+namespace Slic3r {
+
+class Polyline;
+class ThickPolyline;
+typedef std::vector<Polyline> Polylines;
+typedef std::vector<ThickPolyline> ThickPolylines;
+
+class Polyline : public MultiPoint {
+public:
+    Polyline() {};
+    Polyline(const Polyline &other) : MultiPoint(other.points) {}
+    Polyline(Polyline &&other) : MultiPoint(std::move(other.points)) {}
+    Polyline(std::initializer_list<Point> list) : MultiPoint(list) {}
+    explicit Polyline(const Point &p1, const Point &p2) { points.reserve(2); points.emplace_back(p1); points.emplace_back(p2); }
+    explicit Polyline(const Points &points) : MultiPoint(points) {}
+    explicit Polyline(Points &&points) : MultiPoint(std::move(points)) {}
+    Polyline& operator=(const Polyline &other) { points = other.points; return *this; }
+    Polyline& operator=(Polyline &&other) { points = std::move(other.points); return *this; }
+	static Polyline new_scale(const std::vector<Vec2d> &points) {
+		Polyline pl;
+		pl.points.reserve(points.size());
+		for (const Vec2d &pt : points)
+			pl.points.emplace_back(Point::new_scale(pt(0), pt(1)));
+		return pl;
+    }
+    
+    void append(const Point &point) { this->points.push_back(point); }
+    void append(const Points &src) { this->append(src.begin(), src.end()); }
+    void append(const Points::const_iterator &begin, const Points::const_iterator &end) { this->points.insert(this->points.end(), begin, end); }
+    void append(Points &&src)
+    {
+        if (this->points.empty()) {
+            this->points = std::move(src);
+        } else {
+            this->points.insert(this->points.end(), src.begin(), src.end());
+            src.clear();
+        }
+    }
+    void append(const Polyline &src) 
+    { 
+        points.insert(points.end(), src.points.begin(), src.points.end());
+    }
+
+    void append(Polyline &&src) 
+    {
+        if (this->points.empty()) {
+            this->points = std::move(src.points);
+        } else {
+            this->points.insert(this->points.end(), src.points.begin(), src.points.end());
+            src.points.clear();
+        }
+    }
+
+    operator Polylines() const;
+    operator Line() const;
+    Point last_point() const;
+    Point leftmost_point() const;
+    virtual Lines lines() const;
+    void clip_end(double distance);
+    void clip_start(double distance);
+    void extend_end(double distance);
+    void extend_start(double distance);
+    Points equally_spaced_points(double distance) const;
+    void simplify(double tolerance);
+    template <class T> void simplify_by_visibility(const T &area);
+    void split_at(const Point &point, Polyline* p1, Polyline* p2) const;
+    bool is_straight() const;
+};
+
+extern BoundingBox get_extents(const Polyline &polyline);
+extern BoundingBox get_extents(const Polylines &polylines);
+
+inline double total_length(const Polylines &polylines) {
+    double total = 0;
+    for (Polylines::const_iterator it = polylines.begin(); it != polylines.end(); ++it)
+        total += it->length();
+    return total;
+}
+
+inline Lines to_lines(const Polyline &poly) 
+{
+    Lines lines;
+    if (poly.points.size() >= 2) {
+        lines.reserve(poly.points.size() - 1);
+        for (Points::const_iterator it = poly.points.begin(); it != poly.points.end()-1; ++it)
+            lines.push_back(Line(*it, *(it + 1)));
+    }
+    return lines;
+}
+
+inline Lines to_lines(const Polylines &polys) 
+{
+    size_t n_lines = 0;
+    for (size_t i = 0; i < polys.size(); ++ i)
+        if (polys[i].points.size() > 1)
+            n_lines += polys[i].points.size() - 1;
+    Lines lines;
+    lines.reserve(n_lines);
+    for (size_t i = 0; i < polys.size(); ++ i) {
+        const Polyline &poly = polys[i];
+        for (Points::const_iterator it = poly.points.begin(); it != poly.points.end()-1; ++it)
+            lines.push_back(Line(*it, *(it + 1)));
+    }
+    return lines;
+}
+
+inline void polylines_append(Polylines &dst, const Polylines &src) 
+{ 
+    dst.insert(dst.end(), src.begin(), src.end());
+}
+
+inline void polylines_append(Polylines &dst, Polylines &&src) 
+{
+    if (dst.empty()) {
+        dst = std::move(src);
+    } else {
+        std::move(std::begin(src), std::end(src), std::back_inserter(dst));
+        src.clear();
+    }
+}
+
+bool remove_degenerate(Polylines &polylines);
+
+class ThickPolyline : public Polyline {
+public:
+    ThickPolyline() : endpoints(std::make_pair(false, false)) {}
+    ThickLines thicklines() const;
+    void reverse() {
+        Polyline::reverse();
+        std::reverse(this->width.begin(), this->width.end());
+        std::swap(this->endpoints.first, this->endpoints.second);
+    }
+
+    std::vector<coordf_t> width;
+    std::pair<bool,bool>  endpoints;
+};
+
+class Polyline3 : public MultiPoint3
+{
+public:
+    virtual Lines3 lines() const;
+};
+
+typedef std::vector<Polyline3> Polylines3;
+
+}
+
+#endif