From d4ae734659196a3a784d297c879bda5ee8d208f8 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Tue, 6 Jan 2015 20:58:07 +0100
Subject: [PATCH] Minor improvement to IntersectionLine (now subclasses Line)

---
 xs/src/libslic3r/TriangleMesh.cpp | 6 ++----
 xs/src/libslic3r/TriangleMesh.hpp | 5 ++---
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/xs/src/libslic3r/TriangleMesh.cpp b/xs/src/libslic3r/TriangleMesh.cpp
index 94e5668dd..7c2a0a344 100644
--- a/xs/src/libslic3r/TriangleMesh.cpp
+++ b/xs/src/libslic3r/TriangleMesh.cpp
@@ -614,10 +614,8 @@ TriangleMeshSlicer::slice_facet(float slice_z, const stl_facet &facet, const int
     if (!points.empty()) {
         assert(points.size() == 2); // facets must intersect each plane 0 or 2 times
         IntersectionLine line;
-        line.a.x        = points[1].x;
-        line.a.y        = points[1].y;
-        line.b.x        = points[0].x;
-        line.b.y        = points[0].y;
+        line.a          = (Point)points[1];
+        line.b          = (Point)points[0];
         line.a_id       = points[1].point_id;
         line.b_id       = points[0].point_id;
         line.edge_a_id  = points[1].edge_id;
diff --git a/xs/src/libslic3r/TriangleMesh.hpp b/xs/src/libslic3r/TriangleMesh.hpp
index afde8a65d..227bceae0 100644
--- a/xs/src/libslic3r/TriangleMesh.hpp
+++ b/xs/src/libslic3r/TriangleMesh.hpp
@@ -5,6 +5,7 @@
 #include <admesh/stl.h>
 #include <vector>
 #include "BoundingBox.hpp"
+#include "Line.hpp"
 #include "Point.hpp"
 #include "Polygon.hpp"
 #include "ExPolygon.hpp"
@@ -71,11 +72,9 @@ class IntersectionPoint : public Point
     IntersectionPoint() : point_id(-1), edge_id(-1) {};
 };
 
-class IntersectionLine
+class IntersectionLine : public Line
 {
     public:
-    Point           a;
-    Point           b;
     int             a_id;
     int             b_id;
     int             edge_a_id;