GUICam

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Here is the script I attach to a camera that holds a Rect with the cameras pixels in GUI co-ordinate space.

<Boo>

import UnityEngine 

class GUICam (MonoBehaviour): 

  public GUIRect as Rect 
  cam as Camera 
   
  def Start(): 
     cam = transform.camera 

  def Update (): 
     pr=cam.pixelRect 
     r = cam.rect 
     screenHeight = pr.height / r.height 
     GUIRect = Rect(pr.left,screenHeight-(pr.top+pr.height),pr.width,pr.height) 
</Boo>      


to use I put this on GUI generation script which is a camera component and draw a button in the top left of the camera viewport. <Boo>

  aGUICam as GUICam 

  def Start (): 
     aGUICam = transform.camera.GetComponent(GUICam) 

  def ButtonGUI(): 
     r=aGUICam.GUIRect 
     GUI.Button ( Rect (r.xMin+10,r.yMin+50,50, 30), "button"))

</Boo>

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