Mask for collider groups

[rigo128]

Problem: Setting up collision filtering for physics.
Imagine a game with three types of monsters: ground, flying, and ghosts. Ground monsters should collide with other ground monsters. Flying monsters should collide with other flying monsters. Ghosts should be able to move through any monsters. All monsters should collide with the hero's weapons. With the current system of setting collider groups, it's inconvenient to configure such behavior. It will be even more inconvenient to add a new type of monster.

Possible solution:
Allow setting a group as a mask. For example: "enemy, ghost" or "enemy, flying". In Box2d, there is already a possibility for such a setup: https://www.iforce2d.net/b2dtut/collision-filtering

[rigo128]

Unfortunately, the mask group will break the current api with .other_group.

[Daniel-EST]

I don't know if I understood correctly your suggestion. However, I am pretty sure, you can set multiple groups and masks by defining them using comma separation in the editor, just as you mentioned.

[rigo128]

you can set multiple groups

Unfortunately this doesn't work for groups.