how to make a spell bounce of a wall (colission detection)

[xenaris]

Hi guys, I played a map called 'glaive masters' and i saw they used some engine on how the glaive should bounce off walls, i'm asking you guys for a little help on making the engine, i would prefer GUI cause it's been a VERY long time since i used some Jass


Thanks in advance <3

- Xenaris :shades: