Get Transform the frame before OnCollisionEnter

Hi,

A camera is attached to a projectile (as a child), when the projectile enters in collision with another object I would like to detach the camera from the projectile to stop the camera motion and watch the projectile continuing physics simulation.
Actually, when the projectile hits something and calls OnCollisionEnter, I store the current camera's rotation, I trigger DetachChildren on my projectile (camera's parent) to get the camera free of it then I apply saved rotation to the detached camera. However the wanted angle is not preserved and I think it is because the projectile angle is already affected by the collision when OnCollisionEnter is triggered.

Is there a way to get the angle the frame before the collision occurs?

void detachCamera() {
Quaternion currentRotation = ProjCamera.transform.rotation;
gameObject.transform.DetachChildren();
ProjCamera.transform.rotation = currentRotation;
}

 

OnCollisionEnter happens after the physics simulation, and FixedUpdate happens right before. See here: http://docs.unity3d.com/Manual/ExecutionOrder.html

So you can just declare currentRotation in your class and set it in FixedUpdate...

 

Hi Matthew, and thank you for your reply
(it' seems so evident now you've said it, shame on me…)
btw I took a look at Flashbang website, nice work, congrats!