Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/parallel_transport_angles.h

@@ -0,0 +1,51 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2015 Olga Diamanti <olga.diam@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_PARALLEL_TRANSPORT_ANGLE
+#define IGL_PARALLEL_TRANSPORT_ANGLE
+#include "igl_inline.h"
+
+#include <Eigen/Core>
+#include <vector>
+
+namespace igl {
+  // Given the per-face local bases computed via igl::local_basis, this function
+  // computes the angle between the two reference frames across each edge.
+  // Any two vectors across the edge whose 2D representation only differs by
+  // this angle are considered to be parallel.
+
+  // Inputs:
+  //   V               #V by 3 list of mesh vertex coordinates
+  //   F               #F by 3 list of mesh faces (must be triangles)
+  //   FN              #F by 3 list of face normals
+  //   E2F             #E by 2 list of the edge-to-face relation (e.g. computed
+  //                   via igl::edge_topology)
+  //   F2E             #F by 3 list of the face-to-edge relation (e.g. computed
+  //                   via igl::edge_topology)
+  // Output:
+  //   K               #E by 1 list of the parallel transport angles (zero
+  //                   for all boundary edges)
+  //
+template <typename DerivedV, typename DerivedF, typename DerivedK>
+IGL_INLINE void parallel_transport_angles(
+const Eigen::PlainObjectBase<DerivedV>&V,
+const Eigen::PlainObjectBase<DerivedF>&F,
+const Eigen::PlainObjectBase<DerivedV>&FN,
+const Eigen::MatrixXi &E2F,
+const Eigen::MatrixXi &F2E,
+Eigen::PlainObjectBase<DerivedK>&K);
+
+};
+
+
+#ifndef IGL_STATIC_LIBRARY
+#include "parallel_transport_angles.cpp"
+#endif
+
+
+#endif /* defined(IGL_PARALLEL_TRANSPORT_ANGLE) */