Orthographic camera width?

Hi all,

I'm developing a game which uses an Orthographic camera for a 2D using 3D game. This was started as a prototype in Unity 3 before the 2D features were added. I've recently got around to finishing it.

When I started the prototype it was just for a bit of fun to learn unity; however I've fleshed it out as a full game that works really well on touch devices.

At the moment I have a border around the camera viewport which creates pillar-boxing at the sides and is used to keep objects in the scene. Is there a better way to handle this? I've tried determining the viewport width using the ortho size and aspect ratio to create a frame; however I can't get an accurate size.

I've attached a few images to help illustrate the issue, the 16:9 aspect on the iPhone 5 causes the widest pillar-boxing. Interface and game elements have been stripped to make it clearer:

 

To answer part of your question, about calculating the orthographic camera width, I do this in my code by getting the aspect ratio of the Screen.height to Screen.width, as follows (in C#):

float screenAspect = (float) Screen.width / (float) Screen.height;
float camHalfHeight = orthoCam.orthographicSize;
float camHalfWidth = screenAspect * camHalfHeight;
float camWidth = 2.0f * camHalfWidth;

This gives the width of the camera in the world/scene coordinate system.

 

Thanks. I'll give this a go.

 

It works. Thanks.