The rebuild consists in updating all catalog parts (which contains shapes forming the visualization) of the node kit according to field values and other property values (domain, data mapping,...). Be careful, do not use the method OIV.MeshViz.Graph.PoBase.Rebuild() if you use MeshViz property nodes (OIV.MeshViz.Nodes.PoDomain, OIV.MeshViz.Nodes.PoMeshProperty,...), because a representation (axis, legend, 2D and 3D mesh representation,..) depends on the current inherited state. If you need to do an extra work after a representation has been built, do it in a post-rebuild delegate(cf PoBase.addPostRebuildCallback).

Reference