Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/setunion.h

@@ -0,0 +1,43 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2016 Alec Jacobson <alecjacobson@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_SETUNION_H
+#define IGL_SETUNION_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+namespace igl
+{
+  // Union of elements of matrices (like matlab's `union`)
+  //
+  // Inputs:
+  //   A  m-long vector of indices
+  //   B  n-long vector of indices
+  // Outputs:
+  //   C  (k>=m)-long vector of unique elements appearing in A and/or B
+  //   IA  (<k>=m)-long list of indices into A so that C = sort([A(IA);B(IB)])
+  //   IB  (<k>=m)-long list of indices into B so that C = sort([A(IA);B(IB)])
+  //
+  template <
+    typename DerivedA,
+    typename DerivedB,
+    typename DerivedC,
+    typename DerivedIA,
+    typename DerivedIB>
+  IGL_INLINE void setunion(
+    const Eigen::DenseBase<DerivedA> & A,
+    const Eigen::DenseBase<DerivedB> & B,
+    Eigen::PlainObjectBase<DerivedC> & C,
+    Eigen::PlainObjectBase<DerivedIA> & IA,
+    Eigen::PlainObjectBase<DerivedIB> & IB);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "setunion.cpp"
+#endif
+#endif
+
+