1 files changed, 47 insertions, 0 deletions
diff --git a/src/libslic3r/PolylineCollection.hpp b/src/libslic3r/PolylineCollection.hpp
new file mode 100644
index 000000000..87fc1985b
--- /dev/null
+++ b/src/libslic3r/PolylineCollection.hpp
@@ -0,0 +1,47 @@
+#ifndef slic3r_PolylineCollection_hpp_
+#define slic3r_PolylineCollection_hpp_
+
+#include "libslic3r.h"
+#include "Polyline.hpp"
+
+namespace Slic3r {
+
+class PolylineCollection
+{
+    static Polylines _chained_path_from(
+        const Polylines &src,
+        Point start_near,
+        bool no_reverse, 
+        bool move_from_src);
+
+public:
+    Polylines polylines;
+    void chained_path(PolylineCollection* retval, bool no_reverse = false) const
+    	{ retval->polylines = chained_path(this->polylines, no_reverse); }
+    void chained_path_from(Point start_near, PolylineCollection* retval, bool no_reverse = false) const
+    	{ retval->polylines = chained_path_from(this->polylines, start_near, no_reverse); }
+    Point leftmost_point() const
+    	{ return leftmost_point(polylines); }
+    void append(const Polylines &polylines)
+        { this->polylines.insert(this->polylines.end(), polylines.begin(), polylines.end()); }
+
+	static Point     leftmost_point(const Polylines &polylines);
+	static Polylines chained_path(Polylines &&src, bool no_reverse = false) {
+        return (src.empty() || src.front().points.empty()) ?
+            Polylines() :
+            _chained_path_from(src, src.front().first_point(), no_reverse, true);
+    }
+	static Polylines chained_path_from(Polylines &&src, Point start_near, bool no_reverse = false)
+        { return _chained_path_from(src, start_near, no_reverse, true); }
+    static Polylines chained_path(const Polylines &src, bool no_reverse = false) {
+        return (src.empty() || src.front().points.empty()) ?
+            Polylines() :
+            _chained_path_from(src, src.front().first_point(), no_reverse, false);
+    }
+    static Polylines chained_path_from(const Polylines &src, Point start_near, bool no_reverse = false)
+        { return _chained_path_from(src, start_near, no_reverse, false); }
+};
+
+}
+
+#endif