Coordinate conversion interface?

I've skimmed the CSS feature list, but I can't find this one.

I am looking for a way to take a coordinate that is in the coordinate
space of one element in the DOM and convert it into the equivalent
coordinate, but in the coordinate system of another element in the same DOM.

My usecase is as follows, a javascript would like to run a particle
system and position particles relative to one object, but place them in
another.

Received on Tuesday, 20 June 2017 21:10:32 UTC