How can I draw simple line between two points in superpowers?

Install this plugin https://github.com/florentpoujol/superpowers-game-threejs-plugin

Then you can use three.js directly to draw

Here is the documentation of three.js about lines

http://threejs.org/docs/#Reference/Objects/Line

Hope this helps

I installed plugin and played around, I think this is what I need. Thank you so much!