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/ExPolygonCollection.cpp

@@ -0,0 +1,135 @@
+#include "ExPolygonCollection.hpp"
+#include "Geometry.hpp"
+
+namespace Slic3r {
+
+ExPolygonCollection::ExPolygonCollection(const ExPolygon &expolygon)
+{
+    this->expolygons.push_back(expolygon);
+}
+
+ExPolygonCollection::operator Points() const
+{
+    Points points;
+    Polygons pp = *this;
+    for (Polygons::const_iterator poly = pp.begin(); poly != pp.end(); ++poly) {
+        for (Points::const_iterator point = poly->points.begin(); point != poly->points.end(); ++point)
+            points.push_back(*point);
+    }
+    return points;
+}
+
+ExPolygonCollection::operator Polygons() const
+{
+    Polygons polygons;
+    for (ExPolygons::const_iterator it = this->expolygons.begin(); it != this->expolygons.end(); ++it) {
+        polygons.push_back(it->contour);
+        for (Polygons::const_iterator ith = it->holes.begin(); ith != it->holes.end(); ++ith) {
+            polygons.push_back(*ith);
+        }
+    }
+    return polygons;
+}
+
+ExPolygonCollection::operator ExPolygons&()
+{
+    return this->expolygons;
+}
+
+void
+ExPolygonCollection::scale(double factor)
+{
+    for (ExPolygons::iterator it = expolygons.begin(); it != expolygons.end(); ++it) {
+        (*it).scale(factor);
+    }
+}
+
+void
+ExPolygonCollection::translate(double x, double y)
+{
+   for (ExPolygons::iterator it = expolygons.begin(); it != expolygons.end(); ++it) {
+        (*it).translate(x, y);
+    }
+}
+
+void
+ExPolygonCollection::rotate(double angle, const Point &center)
+{
+    for (ExPolygons::iterator it = expolygons.begin(); it != expolygons.end(); ++it) {
+        (*it).rotate(angle, center);
+    }
+}
+
+template <class T>
+bool ExPolygonCollection::contains(const T &item) const
+{
+    for (const ExPolygon &poly : this->expolygons)
+        if (poly.contains(item))
+            return true;
+    return false;
+}
+template bool ExPolygonCollection::contains<Point>(const Point &item) const;
+template bool ExPolygonCollection::contains<Line>(const Line &item) const;
+template bool ExPolygonCollection::contains<Polyline>(const Polyline &item) const;
+
+bool
+ExPolygonCollection::contains_b(const Point &point) const
+{
+    for (ExPolygons::const_iterator it = this->expolygons.begin(); it != this->expolygons.end(); ++it) {
+        if (it->contains_b(point)) return true;
+    }
+    return false;
+}
+
+void
+ExPolygonCollection::simplify(double tolerance)
+{
+    ExPolygons expp;
+    for (ExPolygons::const_iterator it = this->expolygons.begin(); it != this->expolygons.end(); ++it) {
+        it->simplify(tolerance, &expp);
+    }
+    this->expolygons = expp;
+}
+
+Polygon
+ExPolygonCollection::convex_hull() const
+{
+    Points pp;
+    for (ExPolygons::const_iterator it = this->expolygons.begin(); it != this->expolygons.end(); ++it)
+        pp.insert(pp.end(), it->contour.points.begin(), it->contour.points.end());
+    return Slic3r::Geometry::convex_hull(pp);
+}
+
+Lines
+ExPolygonCollection::lines() const
+{
+    Lines lines;
+    for (ExPolygons::const_iterator it = this->expolygons.begin(); it != this->expolygons.end(); ++it) {
+        Lines ex_lines = it->lines();
+        lines.insert(lines.end(), ex_lines.begin(), ex_lines.end());
+    }
+    return lines;
+}
+
+Polygons
+ExPolygonCollection::contours() const
+{
+    Polygons contours;
+    contours.reserve(this->expolygons.size());
+    for (ExPolygons::const_iterator it = this->expolygons.begin(); it != this->expolygons.end(); ++it)
+        contours.push_back(it->contour);
+    return contours;
+}
+
+void
+ExPolygonCollection::append(const ExPolygons &expp)
+{
+    this->expolygons.insert(this->expolygons.end(), expp.begin(), expp.end());
+}
+
+BoundingBox get_extents(const ExPolygonCollection &expolygon)
+{
+    return get_extents(expolygon.expolygons);
+}
+
+}