Hi,

I would like to know if there is a way to extract the 4x4 projection matrix
from a perspective camera declared in Povray.  I currently have these
camera settings:

camera
{
    perspective
    location <-49.61, 1.18, 0.44>
    angle 32.58
    look_at <0.00, 1.18, 0.44>
    right 4/3*x
    up y
    sky -z
}

Is there a way to do so ?

Thank you !
David.

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> I would like to know if there is a way to extract the 4x4 projection
matrix
> from a perspective camera declared in Povray.

Not directly, because POV-Ray doesn't use one internally. You'll probably
have to work it out yourself.

 - Slime
 [ http://www.slimeland.com/ ]

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On Wed,  2 Nov 2005 17:39:30 EST, "pare03" <par### [at] gelulavalca> wrote:
> I would like to know if there is a way to extract the 4x4 projection matrix
> from a perspective camera declared in Povray.  I currently have these
> camera settings:
>
> camera
> {
>     perspective
>     location <-49.61, 1.18, 0.44>
>     angle 32.58
>     look_at <0.00, 1.18, 0.44>
>     right 4/3*x
>     up y
>     sky -z
> }
>
> Is there a way to do so ?

You can try to setup camera with macros of screen.inc include file. These
macros internally declare transform Camera_Transform which contains matrix of
current camera. See how it is done there.

ABX

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