Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/resolve_duplicated_faces.h

@@ -0,0 +1,52 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2015 Qingnan Zhou <qnzhou@gmail.com>
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public License 
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+// obtain one at http://mozilla.org/MPL/2.0/.
+//
+#ifndef IGL_COPYLEFT_RESOLVE_DUPLICATED_FACES
+#define IGL_COPYLEFT_RESOLVE_DUPLICATED_FACES
+
+#include "igl_inline.h"
+#include <Eigen/Core>
+
+namespace igl {
+
+  // Resolve duplicated faces according to the following rules per unique face:
+  //
+  // 1. If the number of positively oriented faces equals the number of
+  //    negatively oriented faces, remove all duplicated faces at this triangle.
+  // 2. If the number of positively oriented faces equals the number of
+  //    negatively oriented faces plus 1, keeps one of the positively oriented
+  //    face.
+  // 3. If the number of positively oriented faces equals the number of
+  //    negatively oriented faces minus 1, keeps one of the negatively oriented
+  //    face.
+  // 4. If the number of postively oriented faces differ with the number of
+  //    negativley oriented faces by more than 1, the mesh is not orientable.
+  //    An exception will be thrown.
+  //
+  // Inputs:
+  //   F1  #F1 by 3 array of input faces.
+  //
+  // Outputs:
+  //   F2  #F2 by 3 array of output faces without duplicated faces.
+  //   J   #F2 list of indices into F1.
+  template<
+    typename DerivedF1,
+    typename DerivedF2,
+    typename DerivedJ >
+  IGL_INLINE void resolve_duplicated_faces(
+      const Eigen::PlainObjectBase<DerivedF1>& F1,
+      Eigen::PlainObjectBase<DerivedF2>& F2,
+      Eigen::PlainObjectBase<DerivedJ>& J);
+
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "resolve_duplicated_faces.cpp"
+#endif
+
+#endif