Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/volume.h

@@ -0,0 +1,74 @@
+// 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_VOLUME_H
+#define IGL_VOLUME_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+namespace igl
+{
+  // VOLUME Compute volume for all tets of a given tet mesh
+  // (V,T)
+  //
+  // vol = volume(V,T)
+  //
+  // Inputs:
+  //   V  #V by dim list of vertex positions
+  //   T  #V by 4 list of tet indices
+  // Outputs:
+  //   vol  #T list of dihedral angles (in radians)
+  //
+  template <
+    typename DerivedV, 
+    typename DerivedT, 
+    typename Derivedvol>
+  IGL_INLINE void volume(
+    const Eigen::MatrixBase<DerivedV>& V,
+    const Eigen::MatrixBase<DerivedT>& T,
+    Eigen::PlainObjectBase<Derivedvol>& vol);
+  template <
+    typename DerivedA,
+    typename DerivedB,
+    typename DerivedC,
+    typename DerivedD,
+    typename Derivedvol>
+  IGL_INLINE void volume(
+    const Eigen::MatrixBase<DerivedA> & A,
+    const Eigen::MatrixBase<DerivedB> & B,
+    const Eigen::MatrixBase<DerivedC> & C,
+    const Eigen::MatrixBase<DerivedD> & D,
+    Eigen::PlainObjectBase<Derivedvol> & vol);
+  // Single tet
+  template <
+    typename VecA,
+    typename VecB,
+    typename VecC,
+    typename VecD>
+  IGL_INLINE typename VecA::Scalar volume_single(
+    const VecA & a,
+    const VecB & b,
+    const VecC & c,
+    const VecD & d);
+  // Intrinsic version:
+  //
+  // Inputs:
+  //   L  #V by 6 list of edge lengths (see edge_lengths)
+  template <
+    typename DerivedL, 
+    typename Derivedvol>
+  IGL_INLINE void volume(
+    const Eigen::MatrixBase<DerivedL>& L,
+    Eigen::PlainObjectBase<Derivedvol>& vol);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "volume.cpp"
+#endif
+
+#endif
+
+