[cairo] 2D Vectors in cairo from 3D

Damian Frank damian.frank at gmail.com
Wed Sep 24 09:49:08 PDT 2008

On Wed, Sep 24, 2008 at 11:32 AM, Stuart Axon <stuaxo2 at yahoo.com> wrote:
> Hi,
>  Is there a way to take something that is in 3d, then get the 2d representation of it into cairo (not the bitmap, but vectors) ? - The program I'm thinking of generates 3d and displays it in opengl.

Sure, although it won't be easy.  Conceptually, you want to do part of
what OpenGL does -- use a projection transformation matrix to
transform each 3D point into a 2D point, projected onto a plane.  Then
you can use them to render in Cairo however you wish.

Explaining how to do *that* is beyond the scope of this mailing list,
but you should be able to use Google to find some resources on
projection matrices and how to use them.


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