How do I make collision only from top?

Hello,

I would like to know if there is a way to make collision between two physics object only if come from top.

Check the picture for more clear explanation

Thank you the community !

you could compare coordinates, but for me the best reliable way to do this is using a collision mask. this means to attach an invisible object to the top of the green rectangle and make that trigger the collisions instead. (https://www.scirra.com/manual/99/pin or https://www.scirra.com/manual/132/common-actions)

If you make the green rectangle contain the invisible object you will have no problem triggering things between each other. (https://www.scirra.com/manual/150/containers)

I see, it may be a good solution yes!

Thank you for this idea !

Cheers !