That is, the maximum interior angle of any triangle is less than or equal to that of any possible triangulation. The Delaunay triangulation can be numerically sensitive in some cases. If numerical problems are present, you will see a warning message to this effect at the end of the triangulation process. To create constrained meshes, you must define an additional input. Lines and polylines found in the input will be mesh edges in the output.
Polygons define a loop with inside and outside regions.
Holes in a polygon should be ordered clockwise. If you choose to create a constrained triangulation, the final mesh may not satisfy the Delaunay criterion. This is because the Delaunay triangulation requires unique input points. In certain cases this implementation may not generate the convex hull. This behavior can be controlled by the Offset instance variable.