added 306

finished chapter 3 of the tutorial
warning: there is a memory leak in 305 that happens rarely, it requires debugging

Former-commit-id: b25ed574a2

python/py_igl/py_eigs.cpp

@@ -0,0 +1,22 @@
+py::enum_<igl::EigsType>(m, "EigsType")
+    .value("EIGS_TYPE_SM", igl::EIGS_TYPE_SM)
+    .value("EIGS_TYPE_LM", igl::EIGS_TYPE_LM)
+    .value("NUM_EIGS_TYPES", igl::NUM_EIGS_TYPES)
+    .export_values();
+
+m.def("eigs", []
+(
+  const Eigen::SparseMatrix<double>& A,
+  const Eigen::SparseMatrix<double>& B,
+  const size_t k,
+  const igl::EigsType type,
+  Eigen::MatrixXd& sU,
+  Eigen::MatrixXd& sS
+)
+{
+  Eigen::VectorXd sSt;
+  bool ret = igl::eigs(A,B,k,type,sU,sSt);
+  sS = sSt;
+  return ret;
+}, __doc_igl_eigs,
+py::arg("A"), py::arg("B"), py::arg("k"), py::arg("type"), py::arg("sU"), py::arg("sS"));