Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/intersect.cpp

@@ -0,0 +1,50 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2013 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/.
+#include "intersect.h"
+template <class M>
+IGL_INLINE void igl::intersect(const M & A, const M & B, M & C)
+{
+  // Stupid O(size(A) * size(B)) to do it
+  // Alec: This should be implemented by using unique and sort like `setdiff`
+  M dyn_C(A.size() > B.size() ? A.size() : B.size(),1);
+  // count of intersects
+  int c = 0;
+  // Loop over A
+  for(int i = 0;i<A.size();i++)
+  {
+    // Loop over B
+    for(int j = 0;j<B.size();j++)
+    {
+      if(A(i) == B(j))
+      {
+        dyn_C(c) = A(i);
+        c++;
+      }
+    }
+  }
+
+  // resize output
+  C.resize(c,1);
+  // Loop over intersects
+  for(int i = 0;i<c;i++)
+  {
+    C(i) = dyn_C(i);
+  }
+}
+
+template <class M>
+IGL_INLINE M igl::intersect(const M & A, const M & B)
+{
+  M C;
+  intersect(A,B,C);
+  return C;
+}
+#ifdef IGL_STATIC_LIBRARY
+// Explicit template instantiation
+template Eigen::Matrix<int, -1, 1, 0, -1, 1> igl::intersect<Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::Matrix<int, -1, 1, 0, -1, 1> const&, Eigen::Matrix<int, -1, 1, 0, -1, 1> const&); 
+#endif