Has anyone any experience with setting the POVRay camera to coincide with a
given OpenGL perspective view ?

Basically the problem is as follows

1. Given a openGL view defined by the GL_PROJECTION and the GL_MODELVIEW
matrix
2. Find the POVRAY camera setting that corrispond to the same view

Any help will be appreciated - thanks

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On Wed, 16 Jul 2003 11:24:38 EDT, "herb" <nomail@nomail> wrote:
> 1. Given a openGL view defined by the GL_PROJECTION and the GL_MODELVIEW
> matrix
> 2. Find the POVRAY camera setting that corrispond to the same view

Ray Gardener made it in oposite direction. See at function
daylon_CameraChanged() in package
http://www.daylongraphics.com/other/povray/patches/povgl.zip

ABX

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ABX wrote:
>On Wed, 16 Jul 2003 11:24:38 EDT, "herb" <nomail[at]nomail> wrote:
>> 1. Given a openGL view defined by the GL_PROJECTION and the GL_MODELVIEW
>> matrix
>> 2. Find the POVRAY camera setting that corrispond to the same view
>
>Ray Gardener made it in oposite direction. See at function
>daylon_CameraChanged() in package
>http://www.daylongraphics.com/other/povray/patches/povgl.zip
>
>ABX
>

Thanks for the help. In the meantime,I have solved the question like this

camera {
perspective
direction <0,0,-1> // This is to account for POV begin RHR
angle 45.000000 // FOV from OPenGL
transform {
matrix <
1.000000,0.000000,0.000000, // Rotation from MODELVIEW
0.000000,1.000000,0.000000, // Rotation from MODELVIEW
0.000000,0.000000,1.000000, // Rotation from MODELVIEW
0,0,0                       // Translation from MODELVIEW
>
 inverse } //Needed as we are moving the camera in POV and not the MODEL as
in OGL
}

The MODELVIEW matrix is obtained from OpenGL by
glGetDoublev(GL_MODELVIEW_MATRIX,&m);

This is now working fine for me, as far as I can see there is no reason why
orthographic should not be as easy.

- Herb

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