Repositioning Camera To Have A Certain Width At Z=0 Plane

Hi all,

I have a camera and it is positioned at (0,0,0). I want to move the camera backwards such that the function Camera.main.ViewportToWorldPoint( new Vector3( 1, 0.5, Camera.main.transform.position.z ) ) will return "almost" exactly 10. In other words, camera's horizontal field of view will be 20-unit wide at the plane Z=0.

I gave this short script to the camera:

Code (JavaScript):

1. function Start()
2. {
3.     transform.position.z -= 10 / Mathf.Tan( Mathf.Deg2Rad * camera.fieldOfView * camera.aspect * 0.5f );
4. }
5. function Update()
6. {
7.     print( camera.ViewportToWorldPoint( new Vector3( 1, 0.5, -transform.position.z ) ) );
8. }

It prints 8.5 to the console. My math is not very good but I really expected some value very close to 10. Can someone help me solve my problem?

Thank you

 

OK changing the code like this did the work:

Code (JavaScript):

1. transform.position.z -= 10 / ( Mathf.Tan( Mathf.Deg2Rad * camera.fieldOfView * 0.5f ) * camera.aspect );

Seems like I misunderstood the meaning of the aspect.