onMouseDrag bleeding into next drag

[lehni]

As reported by Noah Levine on the mailing list:

I'm starting a new project with paper.js after not having looked at the library since june 2015. i'm noticing that the onMouseDrag events in the tutorial/documentation now affect the next drag after the user has completed the onMouseUp.

as an example: in the drag example that produces a line of circles, when you lift the mouse and start another drag, it creates a giant circle, or chain of circles connecting the two drags. I think this has something to do with event.delta using the last point from the last time the event fired. but this didn't use to be a problem with the library - you used to have distinct lines produced when the mouse was lifted and a new drag began.

does anyone have a solution to this or know why this is happening / how to avoid it?

I've attached a screenshot showing the effect. This is happening on the tutorial page as well, but I tested it myself to be sure.

The large circle in the middle is produced when the mouse is clicked and dragged a second time to produce the bottom line running right to left. The lines become connected by the large circle for some reason, which is so large I think because it's using the event.delta from the end of the last line to the new one, instead of starting a new chain altogether.