Move and rotate the camera at the same time

Hi, I'm quite new about unity and I cannot figure out how to make my camera move and rotate at the same time when I click a specific button on my interface.

Let me explain more in detail what I need.

I've added a GUI interface in my project and when I press a specific button, I want that my camera makes a smooth movement while adjusting its rotation (and maybe its field of view). The problem is that all those translations and rotations happen along more than one axes:

  • start position (0,800,610)
  • start rotation (55,180,0)
  • final position (-200,800,1000)
  • final rotation (45,150,0)

I've found a lot of information about how to make GameObjects move or rotate using mouse coordinates, but not one matched my need. Does someone know how to solve this problem with a script?


this is the function I wrote

function CameraMovement()
   var startTime = Time.time;
   var startPoition = movementTarget.transform.position;

   var targetPosition = GameObject.Find("main_cam").transform.position;

   while (Time.time<startTime+1.5)
      var i=(Time.time - startTime);
      movementTarget.transform.position = Vector3.Lerp(startPosition, targetPosition, i);

It is triggered by one of the buttons in my GUI and it realize only a smooth translation. Do you know how can I improve it to have also the rotation?

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asked Nov 18 '11 at 11:42 PM

usagi gravatar image

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2 answers: sort voted first

The method you are using here to translate the movement target is entirely in world space, which is good because if the object rotates, that won't affect its movement direction.

You can Lerp rotation in a similar way to how you are Lerping the position. Check out Quaternion.Lerp and Quaternion.Slerp (http://unity3d.com/support/documentation/ScriptReference/Quaternion.html). You can then lerp from a current rotation to a new rotation.

If you are unsure how quaternions work, you can probably get by without knowing the internals of it all. There are a few static Quaternion functions that you can use to create a quaternion that represents a rotation direction. For example, Quaternion.Euler(x,y,z) will give you a Quaternion that represents a rotation with the given x,y,z angles.

You could then say something like

movementTarget.transform.rotation = Quaternion.Slerp(startRotation, endRotation, i);

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answered Nov 21 '11 at 05:52 PM

kromenak gravatar image

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Thank you for the answer.

In the meanwhile I've found the iTween library, that is really easy to use and allows me to do the movements that I need.

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answered Nov 28 '11 at 10:20 AM

usagi gravatar image

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asked: Nov 18 '11 at 11:42 PM

Seen: 1898 times

Last Updated: Nov 28 '11 at 10:20 AM