Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/cotmatrix_entries.h

@@ -0,0 +1,37 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2014 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_COTMATRIX_ENTRIES_H
+#define IGL_COTMATRIX_ENTRIES_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+namespace igl
+{
+  // COTMATRIX_ENTRIES compute the cotangents of each angle in mesh (V,F)
+  // 
+  // Inputs:
+  //   V  #V by dim list of rest domain positions
+  //   F  #F by {3|4} list of {triangle|tetrahedra} indices into V
+  // Outputs:
+  //     C  #F by 3 list of 1/2*cotangents corresponding angles
+  //       for triangles, columns correspond to edges [1,2],[2,0],[0,1]
+  //   OR
+  //     C  #F by 6 list of 1/6*cotangents of dihedral angles*edge lengths
+  //       for tets, columns along edges [1,2],[2,0],[0,1],[3,0],[3,1],[3,2] 
+  //
+  template <typename DerivedV, typename DerivedF, typename DerivedC>
+  IGL_INLINE void cotmatrix_entries(
+    const Eigen::MatrixBase<DerivedV>& V,
+    const Eigen::MatrixBase<DerivedF>& F,
+    Eigen::PlainObjectBase<DerivedC>& C);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "cotmatrix_entries.cpp"
+#endif
+
+#endif