Mesh generation on the geometry is performed in the bottom-up
flow: nodes on vertices are created first, then edges are divided into
-segments using nodes on vertices; the segments of edges are then
-used to mesh faces; then the mesh of faces is used to mesh
+segments using nodes on vertices; the node of segments are then
+used to mesh faces; then the nodes of faces are used to mesh
solids. This automatically assures the conformity of the mesh.
It is required to choose a meshing algorithm for every dimension of
