update bundled_deps

bundled_deps/libigl/igl/exact_geodesic.h

@@ -0,0 +1,55 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2017 Zhongshi Jiang <jiangzs@nyu.edu>
+//
+// 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_EXACT_GEODESIC_H
+#define IGL_EXACT_GEODESIC_H
+
+#include "igl_inline.h"
+#include <Eigen/Core>
+
+namespace igl 
+{
+  // Exact geodesic algorithm for triangular mesh with the implementation from https://code.google.com/archive/p/geodesic/, 
+  // and the algorithm first described by Mitchell, Mount and Papadimitriou in 1987
+  //
+  // Inputs:
+  //   V  #V by 3 list of 3D vertex positions
+  //   F  #F by 3 list of mesh faces
+  //   VS #VS by 1 vector specifying indices of source vertices
+  //   FS #FS by 1 vector specifying indices of source faces
+  //   VT #VT by 1 vector specifying indices of target vertices
+  //   FT #FT by 1 vector specifying indices of target faces
+  // Output:
+  //   D  #VT+#FT by 1 vector of geodesic distances of each target w.r.t. the nearest one in the source set
+  //
+  // Note: 
+  //      Specifying a face as target/source means its center. 
+  //
+    template <
+    typename DerivedV,
+    typename DerivedF,
+    typename DerivedVS,
+    typename DerivedFS,
+    typename DerivedVT,
+    typename DerivedFT,
+    typename DerivedD>
+    IGL_INLINE void exact_geodesic(
+      const Eigen::MatrixBase<DerivedV> &V,
+      const Eigen::MatrixBase<DerivedF> &F,
+      const Eigen::MatrixBase<DerivedVS> &VS,
+      const Eigen::MatrixBase<DerivedFS> &FS,
+      const Eigen::MatrixBase<DerivedVT> &VT,
+      const Eigen::MatrixBase<DerivedFT> &FT,
+      Eigen::PlainObjectBase<DerivedD> &D);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "exact_geodesic.cpp"
+#endif
+
+#endif