From 7d135252b09930528ea1fcbef41940a5baa044c5 Mon Sep 17 00:00:00 2001
From: Joseph Lenox <lenox.joseph@gmail.com>
Date: Wed, 18 Jul 2018 22:39:44 -0500
Subject: [PATCH] Added a method borrowed from prusa3d/Slic3r that tests if two
 surfaces are compatible.

---
 xs/src/libslic3r/Surface.hpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/xs/src/libslic3r/Surface.hpp b/xs/src/libslic3r/Surface.hpp
index 867f9a61b..1495d7215 100644
--- a/xs/src/libslic3r/Surface.hpp
+++ b/xs/src/libslic3r/Surface.hpp
@@ -149,6 +149,15 @@ inline void polygons_append(Polygons &dst, SurfacesPtr &&src)
     }
 }
 
+inline bool surfaces_could_merge(const Surface &s1, const Surface &s2)
+{
+    return 
+        s1.surface_type      == s2.surface_type     &&
+        s1.thickness         == s2.thickness        &&
+        s1.thickness_layers  == s2.thickness_layers &&
+        s1.bridge_angle      == s2.bridge_angle;
 }
 
+} // namespace Slic3r
+
 #endif