How to make two cameras face the same direction?

Question

I basically have two scipts controlling the same camera. One for Third Person, one for first person. When I switch between the two, I want them to face the same direction. My plan was to get the forward vector of one of the cameras and use transform.lookAt on the other, to face that direction, sadly that doesn't work as intended.

Drawing a ray with that method, starting at transform.position works perfectly fine. What do I do wrong?

Answer 1

Answer by whydoidoit · Sep 17, 2012 at 03:37 PM

Try:

 camera2.transform.forward = camera1.transform.forward;

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PsychoHead · Sep 17, 2012 at 04:21 PM 0

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I don't quite understand your tip, and how this should work?

My idea was passing the direction from the 3. Person camera over to the 1. Person camera, converted to world space.

 Vector3 globalForward = Transform.TransformDirection(transform.forward);
 FP_Camera.Instance.setDirection(globalForward);

Afterwards I wanted to adjust the 1. person camera with it's script:

     public void setDirection(Vector3 globalLookDirection)
     {
 
         Vector3 localLookDirection = transform.InverseTransformDirection(globalLookDirection);
         transform.LookAt(localLookDirection);
     }

What's my mistake behind this thought? Like I said, drawing a ray works as intended, but the camera doesn't get adjusted at all.

whydoidoit · Sep 17, 2012 at 04:25 PM 0

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transform.forward is already in world space coordinates - there is no need to transform it. LookAt looks at something (a point in 3d space not a direction). Setting one transforms forward to another ones makes them look in the same direction - but to ensure that Up didn't change you could do:

   camera2.transform.rotation = Quaternion.LookRotation(camera1.transform.forward, transform.up);

PsychoHead · Sep 17, 2012 at 05:15 PM 0

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Okay, it doesn't work. I guess it's some problem with another part of my script, that I haven't thought of yet. After all, it's the same camera, just moved. When I just change it's position, the rotation shouldn't even change, therefor there should not be the need for a new rotation.

I'll just continue searching for the problematic part.

Thank you nonetheless!

whydoidoit · Sep 17, 2012 at 05:19 PM 0

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@fattie is right in the comment above - I might have been too literal in my answer - it's possible this isn't the effect you are looking for!

How to make two cameras face the same direction?

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