OnTriggerExit not happening during collision?

Questions & Answers
1

Hi there! I’m running into a problem where OnTriggerExit is rarely not being called when the player object leaves a trigger volume. It seems that this happens when the player objects leaves the trigger volume at the exact moment they come down from a jump - So I think it has to do with a collision happening at the exact same moment. To be clear:

  1. I’ve got a character controller on a box collider ground.
  2. I have a very large box collider trigger that intersects with half the ground, such that the player can cross into this trigger or leave again.
  3. Sometimes OnTriggerExit is not called properly. I am not 100% certain about this, but I’m pretty sure:

OnTriggerExit is not being called when the player jumps while inside the trigger, and leaves the trigger at the exact moment their feet touch the ground.

Any ideas?

UPDATE: I’ve been able to reproduce this issue without jumping. If I greatly lower the timeScale, I can move slowly into a trigger until OnTriggerEnter is called, and then often slowly move out without OnTriggerExit being called.

Final update: I’m almost certain this is a Unity problem I can’t fix, so I just worked around it. In my case, because the problem had to do with locking the camera with a trigger (and thus, the problem was that the player could wonder off screen when OnTriggerExit wasn’t called) I just implemented a renderer.isVisible check in case this bug happened, which causes the camera to exit its locked state. Not an ideal situation, but the problem’s solved…

2

Heres a raycast example the way this works is if the play is 0.1f from the ground Obstruction is set to true.

	public bool obstructionDetected;

	void Update () {
		Vector3 clearCheck = transform.TransformDirection (Vector3.down * 0.1f);
            /// this Debug is optional its just here to mimic the actual raycast
            /// and display in the Scene window, delete it when ur not testing anymore.
		Debug.DrawRay (transform.position, clearCheck, Color.green, 3f, true);
            // this raycast section basically says, if from our transforms position
            // downwards we detect anything within a range of 0.1f obstruction will be true.
		if (Physics.Raycast (transform.position, clearCheck, 0.1f)) {
			obstructionDetected = true;		
		} else {
			obstructionDetected = false;
		}