Python bindings for barycentric_to_global()

Former-commit-id: 777d5b185879947a39a90da2239a1703879c5744

python/py_doc.cpp

@@ -76,6 +76,20 @@ const char *__doc_igl_barycentric_coordinates = R"igl_Qu8mg5v7(// Compute baryce
   // Outputs:
   //   L  #P by 4 list of barycentric coordinates
   //   )igl_Qu8mg5v7";
+const char *__doc_igl_barycentric_to_global = R"igl_Qu8mg5v7(// Converts barycentric coordinates in the embree form to 3D coordinates
+  // Embree stores barycentric coordinates as triples: fid, bc1, bc2
+  // fid is the id of a face, bc1 is the displacement of the point wrt the 
+  // first vertex v0 and the edge v1-v0. Similarly, bc2 is the displacement
+  // wrt v2-v0.
+  // 
+  // Input:
+  // V:  #Vx3 Vertices of the mesh
+  // F:  #Fxe Faces of the mesh
+  // bc: #Xx3 Barycentric coordinates, one row per point
+  //
+  // Output:
+  // #X: #Xx3 3D coordinates of all points in bc
+  //   )igl_Qu8mg5v7";
 const char *__doc_igl_boundary_facets = R"igl_Qu8mg5v7(// BOUNDARY_FACETS Determine boundary faces (edges) of tetrahedra (triangles)
   // stored in T (analogous to qptoolbox's `outline` and `boundary_faces`).
   //

python/py_doc.h

@@ -4,6 +4,7 @@ extern const char *__doc_igl_arap_solve;
 extern const char *__doc_igl_avg_edge_length;
 extern const char *__doc_igl_barycenter;
 extern const char *__doc_igl_barycentric_coordinates;
+extern const char *__doc_igl_barycentric_to_global;
 extern const char *__doc_igl_boundary_facets;
 extern const char *__doc_igl_boundary_loop;
 extern const char *__doc_igl_cat;

python/py_igl.cpp

@@ -11,6 +11,7 @@
 #include <igl/avg_edge_length.h>
 #include <igl/barycenter.h>
 #include <igl/barycentric_coordinates.h>
+#include <igl/barycentric_to_global.h>
 #include <igl/boundary_facets.h>
 #include <igl/boundary_loop.h>
 #include <igl/cat.h>
@@ -91,6 +92,7 @@ void python_export_igl(py::module &m)
 #include "py_igl/py_avg_edge_length.cpp"
 #include "py_igl/py_barycenter.cpp"
 #include "py_igl/py_barycentric_coordinates.cpp"
+#include "py_igl/py_barycentric_to_global.cpp"
 #include "py_igl/py_boundary_facets.cpp"
 #include "py_igl/py_boundary_loop.cpp"
 #include "py_igl/py_cat.cpp"

python/py_igl/py_barycentric_to_global.cpp

@@ -0,0 +1,12 @@
+
+
+m.def("barycentric_to_global", []
+(
+  const Eigen::MatrixXd& V,
+  const Eigen::MatrixXi& F,
+  const Eigen::MatrixXd& bc
+)
+{
+  return igl::barycentric_to_global(V, F, bc);
+}, __doc_igl_barycentric_to_global,
+py::arg("V"), py::arg("F"), py::arg("bc"));

python/python_shared.cpp

@@ -57,6 +57,7 @@ PYBIND11_PLUGIN(pyigl) {
            avg_edge_length
            barycenter
            barycentric_coordinates
+           barycentric_to_global
            boundary_facets
            boundary_loop
            cat