I am trying to add a float data type to each face in my mesh. I am following the storing custom properties tutorial but I am a little confused on how to assign each face with an actual value.

For example: 

 OpenMesh::FPropHandleT<float> fprop_float;
 mesh.add_property(fprop_float, "fprop_float");
 mesh.property(fprop_float).set_persistent(true);

 mesh.face(mesh.face_handle(1)) = 1.12;

Thank you very much for your help and quick responses.

- William