Arcs jumping in editor

[Jiri Srba]

To reproduce:

draw one place and under it about 4 transitions in one line, very close to each other.
Now draw an arc from place to transition number 2, then to number 3 and then to number 1
and the already drawn arrows start to behave in a weird way (jump from a transition to transition).

[Jiri Srba (srba)]

The same problem is with inhibitor arcs. Once the net is saved and opened, the arcs point to the correct transitions however.

[Kenneth Yrke Jørgensen (yrke)]

To Reproduce,

Create a new with a place and a number of transitions around.

Create new arc from place, hover/snap to a number of transitions and select one transition.
Create a new arc from place, hover/snap to a transition, if the transition was hover/snaped to by the old arc, the old arc will update its position to the current selected transition.
Will only work for transitions.

[Kenneth Yrke Jørgensen (yrke)]

Transitions uses an internal ArcAngleCompareObject, used to save the input angle of arcs. If a arc is removed from the transition, the ArcAngleCompareObject is not updated. When updateEndPoint is called on a transition, this will make all arcs that have a ArcAngleCompareObject jump to the transition.

[Peter Haahr Taankvist (ptaank)]

It seems that it is removed when you drag it on to the canvas, but kept if you drag it on to another transition directly without hovering the canvas.