Actions tests

Triangular actions

Flip

We want to ensure that flip operations are performed correctly. Consider the following mesh:

If we flip the dart between nodes n0 and n3, we should obtain the following mesh:

Split

We want to ensure that split operations are performed correctly. Consider the following mesh:

If we split the dart between nodes n0 and n3, we add a node n5 on the middle of the edge and two faces are created. We should obtain the following mesh:

Collapse

We want to ensure that split operations are performed correctly. Consider the following mesh:

Here we can't collapse the dart between nodes n5 and n2 because n2 is on boundary. However we can collapse the edge between n4 and n5. We should obtain the following mesh: