I am developing a wargame and part of the planning process is drawing graphics on the map as each side plans their operation. Is there a way to allow a drawing tool of some type in a vassal game?
I know I can make a large menu of png icons they can use as a library to pull from but control graphics can come in a wide array of shapes and sizes
No, there is no in-built facility for this.
You could possibly look at Screen marker/annotation apps, but the results from free-hand drawing via a mouse tends to be pretty sad at the best of times, and I doubt you will get much of an icon library.
You will get much better results implementing your ‘library of pngs’ idea.
You could make it more manageable by say, Loading a set of different sized arrows into layers and adding a rotate trait, and some ‘Move Fixed Distance’ nudge keys.
Agreed, it will be a big job, but start with the basics.
The Roads and Boats module simulates drawing roads on the map which may have some similarities to what you’re wanting to do. Although the lines depicting the roads are pre-drawn, the players choose the overall path.