This document currently is a largely undocumented draft so it is more informational to refer to the C API at the moment: Open Mesh Effect API Reference.
Properties attached to an MfxMesh. Usage:
MfxMeshProps props; mesh.FetchProperties(props);
Number of points.
A point is a location in the 3D space.
Number of vertices.
A vertex is a “face corner”, associating a face to a point. For instance UVs are typically attached to vertices because a given point may have different UV coordinates depending on whether it belongs to a face or another one.
NB: This is called a “loop” in Blender.
Number of faces.
Faces may have 2 or more vertices. When they have only two vertices, there are also called “loose edges”.
Tells whether the mesh has some 2-vertices faces. If set to true, the mesh is garrantied to have at least 3 vertices per face. Otherwise, there is no warranty, namely the mesh may or may not have loose edges.
If different from -1, tells that all faces of the mesh have the same number of vertices. For instance, a mesh only made of triangles may have this property set to 3. A wireframe mesh, containing only loose edges, will have this set to 2. When it set to -1, individual vertex counts for each face are given by the kOfxMeshAttribFaceCounts
Number of attributes attached to this mesh. NB: This is not useful at the moment because there is no way to discover what are the names of these attributes.