detecting when layout stop computation (find optimal)

Hi,
I am trying to play around with UX for graphs in webgl, but with images as textures.

I am not having still good results (as a number of nodes and links opened before I see cluttering, it is <= than SVG, so there is room for improving).

In SVG, I was able to play around with precompute() and postcompute() functions, pausing rendering ad hoc.

Does a layout function return a variable when graph is relaxed ?
As example, settings with theta = 0 will allow reduce number of computations, and I would like to pause rendering each time the graph is relaxed.

Start by reading the layout function and the precompute() and postcompute() entry points mentioned in the issue, then examine how theta = 0 affects computation. Done means establishing a clear way to detect when the graph is relaxed so rendering can be paused.

Written by the indexing model from the issue text.