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Question by sbsmith · Aug 15, 2017 at 04:14 PM · physicscharactercontrollercollision detectiontriggers

How do you avoid collisions when teleporting CharacterControllers?

In my game I need to teleport game objects (colliders and triggers) in close proximity to each other without them colliding. In some cases, after a collider and a trigger are already touching, I need to move them both without OnTriggerExit or OnTriggerEnter being called again

This works for Rigidbodies and triggers but not for CharacterControllers and triggers. I believe CharacterController collision is handled differently than Rigidbody (even when Rigidbody is set to dynamic).

These are the two behaviours I need to support.

  1. If a character controller is inside of a trigger, I can move both the controller and the trigger (together so they remain connected) and no new OnTriggerExit or OnTriggerEnter will be called.

  2. If a character controller and a trigger (not touching) switch places, no OnTriggerEnter and OnTriggerExit will be called at all. ie. no collision is detected because they never actually collide.

Like I said, the above works fine with Rigidbodies but not with CharacterControllers. If I attempt either of the above, there is a call to exit and a call to enter for #1 and a call to enter and to exit for #2.

Behaviour #2 can be met for CharacterControllers if it is set to inactive before moving and then reactivated after moving. However, this breaks behaviour #1.

Thanks for your help.

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avatar image Razputin · Aug 15, 2017 at 05:38 PM 0
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You should rewrite your question because I can't decipher what you're trying to ask.

avatar image sbsmith Razputin · Aug 15, 2017 at 08:03 PM 0
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Thanks, I'll try to rewrite it to be more clear.

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