hello, i am trying to make this phisics based 2D platformer that you are a little ball and you roll arround to move. all the code is using the phisics behavior and aplying force and changing velocity arround. the only problem is i cant detect if the player is on the ground or not so i can tell if they are suposed to be able to jump. i tried puting the platform behavior just to detect ifim touching the floor but it broke the physics, and the only other solution i can think of is puting stuff a bit over the floor to detect if the player is touching it and there fore if it's touching the floor, but that would be really slow. does anyone know what i can do to solve this?