How to check for a specific collider on a trigger?

Questions & Answers
1

I am making a checkpoint system in a racing game. The checkpoint objects are have trigger colliders and I want them to only check for a box collider on a vehicle, so only a portion of the vehicle (outlined by the box collider) activates the checkpoint.

2

You can use tags to get specific colliders.

3

@sleepyfunnyfish
1- Create an empty object as a child of your vehicle, name it CarCollider

2- add a BoxCollider component to that CarCollider object

3- place that very object in a separate layer, that you create only for that purpose. (Eg. A new layer named « CarColliderLayer »)

4- make sure in the Physics tab in settings that the Checkpoint and CarColliderLayer layers do in fact interact

5- Check, in the OnTrigger method, that the collision is with that new layer. As the CarCollider is a «reserved » layer of yours, the collision detection will be very specific.