List of triangles that are on the island borders, and which linked_edges
can lead to a triangle that have another triangle.island value.
<ul>
<li>There is no need to register all possible exit triangles. Only one per adjacent island is enough.</li>
<li>Generally it is 4 walkable triangles: 1 top left, 2 bot left and 1 bot right</li>
</ul>
List of triangles that are on the island borders, and which linked_edges can lead to a triangle that have another triangle.island value.
<ul> <li>There is no need to register all possible exit triangles. Only one per adjacent island is enough.</li> <li>Generally it is 4 walkable triangles: 1 top left, 2 bot left and 1 bot right</li> </ul>