Camera Transformation Matrix

Date : Sat, 21 Apr 2007 22:46:38 +0200
To : XSI(at)Softimage.COM
From : "Abdo Haji-Ali" <abdo.haji.ali(at)gmail.com>
Subject : Camera Transformation Matrix
Greetings,

I was wondering if there's a way to get the transformation matrix of a camera (or a camera rig)?
What I'm trying to do is to find the world coordinates of a point in screen coordinates.
My understanding of the camera transformation matrix is that one can use it to do the following:
Screen(x,y,0,1) = World(x,y,z,w) * Tranformation_Matrix

So I thought that I can use it like this:
World(x,y,z,w) = Screen(x,y,0,1) * Inverse_Of_Tranformation_Matrix

Am I right about this? And how can I get this transformation matrix?

Thanks,
Abdo Haji-Ali
Programmer
In|Framez

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