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Question by Ebil · Jan 25, 2014 at 09:10 PM · camera2dorthographic

2D Orthographic matching proportions to screen resolution

Hello,

Im creating a 2D Game with an Orthographic camera setup. I have problems with the proportions, for example I have screen resolution 1280x768 Orthographic Cam Size 5. When I create a plane - which size must it have to exactly fill the screen? Thanks in advance :) Ebil

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Answer by robertbu · Jan 26, 2014 at 02:40 AM

Orthographic size is 1/2 of the size seen by the camera vertically, and the horizontal size will be based on the aspect ratio. So you want to make your plane:

 var y : float = Camera.main.orthographicSize * 2.0;
 var x : float = y * Screen.width / Screen.height;
 transform.localScale = Vector3(x, y, 1);

This will be the size for Unity's Quad. For a Plane, divide the size by 10 since Unity's built-in plane is 10 x 10 with a local scale of (1,1,1).

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avatar image Happy-Zomby · Mar 29, 2016 at 09:56 AM 0
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Thanks a lot for that. This is great to set scene backgrounds to resolutions - notably main menu. Just a quick note - make sure you don't declare Y and X outside of your main thread (e.g. not in start or other function) if not you get a main thread error. So to be safe this (I'm dividing by 10 as I have a plane):

  var y : float;
  var x : float;
  
  function Start()
  {
  y = Camera.main.orthographicSize * 2.0;
 x = y * Screen.width / Screen.height;
  transform.localScale = Vector3(x/10, y/10, 1);
  }
  

or that

  function Start()
  {
 var y = Camera.main.orthographicSize * 2.0;
 var x = y * Screen.width / Screen.height;
  transform.localScale = Vector3(x/10, y/10, 1);
  }
  

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