I have a concave volume and would like to break it into tetrahedra as quickly as possible. I am not too concerned about the quality of the output and I don't need a Delaunay tetrahedralization. (Specifically, I'm not looking for tetgen, or similar projects, which generates high quality Delaunay tetrahedralization for engineering applications. I want fast)
What is a fast, if not so high quality, algorithm I could use?