Splitting an Arbitrary Projection Matrix into 2 (or 4)

Math and Physics Programming

Started by DrGUI February 10, 2005 01:54 PM

3 comments, last by DrGUI 19 years, 2 months ago

402

Author

February 10, 2005 01:54 PM

How do I split an arbitrary projection matrix into 2 (or 4) halfs (quarters) so I could have two views? I am now doing my GCSEs and have not covered matrices in lessons, although I have learnt about them myself to make games. Any help would be greatly appreciated.

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The Reindeer Effect

211

February 10, 2005 02:07 PM

I am a bit confused by your post, but it sounds like what you want is two projection matrices and two viewports. The whole viewport thing is really API dependent, and the two projection matrices are just like having one matrix, but for reach view. Want four views? Four matrices.

Eelco

301

February 10, 2005 02:39 PM

yeah you shouldnt really be splitting any matrices.

you should just set up multiple cameras, and derive their seperate projection matrices based on their own properties such as frustrum or whatever you use to generate your camera class.

DrGUI

402

Author

February 12, 2005 03:03 PM

Actually I am trying to make a high-resolution screen-shot system. I saw an article on this and it split up the projection matrix using a FOV projection, took the separate screen-shots then pieced them together. I want to know how to do this with any projection matrix.
Thanks

------------------------------------Development of Rock, Paper, Scissors - The Third Dimension

DrGUI

402

Author

February 17, 2005 03:54 PM

Can this be bumped up or do I need to repost?

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