Is it possible to define your own Colliders (e.g. Cylinder)

Questions & Answers
1

Unity seems to provide only a small selection of colliders and then a generic Mesh collider. However, the physics and performance characteristics for a Cylindrical Mesh Collider are obviously going to be worse than one defined using equations of line and circle.

Is there a reason why there is no cylinder collider? Is there any way of defining our own CylinderCollider class? How would we go about doing this?

2

Capsules are more efficient than cylinders for collision detection and can be used in most of the same cases, so I guess there’s little reason for a built-in cylinder collider as well as the capsule.

You can always define your own cylinder collider by using a convex mesh collider on the built-in cylinder primitive if you really need to.