How are labels propagated during refinement?
• Element labels • Quite simply, when an element is refined, it’s label is propagated to all new elements that it contains. For example, if an element were labeled EPI, and EPI were subdivided into 3 new elements, all 3 new elements would now be labeled EPI. • Node labels • While node label propagation is a bit more complicated, it’s also easy to understand, once you know the rules. • Label tokens • Label tokens are delimited with underscores. For example, the label EPI_BASE_OLD_A, has the tokens EPI, BASE, OLD, and A • Rules • Nodes created on a line • Label is propagated if both nodes connecting that line had the same label, or have a token in common. If they have a token in common, only the token is propagated. For example. If node 1 were labeled EPI_BASE and node 2 were labeled EPI_APEX, then a node created on a line between these two nodes would be labeled EPI • Nodes created on a face • Label is propagated if all 4 nodes which make up the face have the same label or have a token
