Multiple Objects & Gradients?

[KehanLong]

Hi,

Thanks for your nice work and decent code. I have two questions:
(1). If there are multiple objects, for example, there are multiple circles in your 2D toy example, is there a way of handing them and estimate the shortest signed distance among all those circles?

(2). Is there an analytic expression of the derivative/gradients of the signed distance function you estimated? If so, how can I compute it?

Thanks!