How to check collision using onCollideObservable()

[RainerHeintzmann]

Note that this playground is missing the essential init codes as pointed out by @Joe_Kerr:

Collisions with lines

See here: https://playground.babylonjs.com/#YZSWTL#9 You need to init due to the onBeforeRenderObservable. Axis-aligned bounding box / oriented bounding box (see image) N.B. If the line is for a laser beam, then you can just use a little sphere on the tip of the laser as a collider.

Babylon.js Playground