[SOLVED] Is there any way to get the collisions of an entity on demand? (Good way to to detect ground collision for jumping)

[LeXXik]

Right, so there is probably no universal approach and the jump mechanic is usually tailored to the game. From what I read in your description, your issue with the raycast was that it doesn’t report the collision, when the player is standing on the edge. You can mitigate it by using a convex sweep test of the physics engine, instead of raycast. If your character has a cyllinder collision shape, you can cast a sphere shape downwards to test for ground touch.

I made a convex cast extension to make it easier to do convex shapes collision tests:

PlayCanvas physics extension

Sometimes there comes a need to detect a collision, when simple raycast is not suitable. For example, when you want to check if camera sphere can fit into that new location, or a car can pass between two trees without hitting them. To manage such cases, you would want to cast a sphere along the path or some sort of a shape, that would detect the collision. I’ve made a physics extension to do just that: Example project. (Click to change shapes. An invisible shape is a custom shape - convex tri…

Edit:
There is also a way for the collider to continuously track the collision with a rigidbody. I made an example a while back, but it hasn’t been battle tested, so might have bugs/issues:
https://playcanvas.com/project/718607/overview/oncollisionstay