Is it possible (already in Vassal) to draw a line between two pieces? I already use LOS to show the maximum firing range. I would like to link the two pieces, with unique names, this mainly for long range artillery units off the screen.
The first example shows the current range firing ring.
Perhaps movement trails could mimic the line between pieces. Add a Movement Trail to the Fire & Blast marker. Position it at the firing unit and move it to the target. Not sure how you specify the firer and target. It could be automated somewhat with a Mulit-location command or Send to Location. Of course the line will disappear when someone clears movement trails. That may be good or bad depending on your use case.
So, this morning I realized that the MOVEMENT TRAIL command was similar to what I wanted (80%). I created a copy and renamed it TRAJECTORY TRAIL and with some editing and TRIGGER commands I had success! Not 100% what I wanted but close.