Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/dihedral_angles.h

@@ -0,0 +1,55 @@
+// 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_DIHEDRAL_ANGLES_H
+#define IGL_DIHEDRAL_ANGLES_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+namespace igl
+{
+  // DIHEDRAL_ANGLES Compute dihedral angles for all tets of a given tet mesh
+  // (V,T)
+  //
+  // theta = dihedral_angles(V,T)
+  // theta = dihedral_angles(V,T,'ParameterName',parameter_value,...)
+  //
+  // Inputs:
+  //   V  #V by dim list of vertex positions
+  //   T  #V by 4 list of tet indices
+  // Outputs:
+  //   theta  #T by 6 list of dihedral angles (in radians)
+  //   cos_theta  #T by 6 list of cosine of dihedral angles (in radians)
+  //
+  template <
+    typename DerivedV, 
+    typename DerivedT, 
+    typename Derivedtheta,
+    typename Derivedcos_theta>
+  IGL_INLINE void dihedral_angles(
+    Eigen::PlainObjectBase<DerivedV>& V,
+    Eigen::PlainObjectBase<DerivedT>& T,
+    Eigen::PlainObjectBase<Derivedtheta>& theta,
+    Eigen::PlainObjectBase<Derivedcos_theta>& cos_theta);
+  template <
+    typename DerivedL, 
+    typename DerivedA, 
+    typename Derivedtheta,
+    typename Derivedcos_theta>
+  IGL_INLINE void dihedral_angles_intrinsic(
+    Eigen::PlainObjectBase<DerivedL>& L,
+    Eigen::PlainObjectBase<DerivedA>& A,
+    Eigen::PlainObjectBase<Derivedtheta>& theta,
+    Eigen::PlainObjectBase<Derivedcos_theta>& cos_theta);
+
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "dihedral_angles.cpp"
+#endif
+
+#endif
+