Revert "Revert "Marching Tetrahedra (#716)" (#924)" (#925)

This reverts commit 65aa93e9ef [formerly 47634615ce].

Former-commit-id: fd8d66156c

python/py_igl/py_marching_tets.cpp

@@ -0,0 +1,28 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2017 Sebastian Koch <s.koch@tu-berlin.de> and Daniele Panozzo <daniele.panozzo@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/.
+m.def("marching_tets", []
+(
+  const Eigen::MatrixXd& V,
+  const Eigen::MatrixXi& T,
+  const Eigen::MatrixXd& plane,
+  Eigen::MatrixXd& U,
+  Eigen::MatrixXi& G,
+  Eigen::MatrixXi& J,
+  Eigen::SparseMatrix<double>& BC
+)
+{
+  assert_is_VectorX("plane", plane);
+  Eigen::VectorXd planev;
+  if (plane.size() != 0)
+    planev = plane;
+  Eigen::VectorXi Jv;
+  igl::marching_tets(V, T, planev, U, G, Jv, BC);
+  J = Jv;
+}, __doc_igl_marching_tets,
+py::arg("V"), py::arg("T"), py::arg("plane"), py::arg("U"), py::arg("G"), py::arg("J"), py::arg("BC"));
+