When you can go in any direction and not just constrained to up down left right, you'd want the fast marching method [1]. [1] https://en.wikipedia.org/wiki/Fas

When you can go in any direction and not just constrained to up down left right, you'd want the fast marching method [1]. [1] https://en.wikipedia.org/wiki/Fast_marching_method https://en.wikipedia.org/wiki/Fast_marching_method