Re: [Chromium-dev] Error in stereo.conf

[Brian P. <bri...@tu...>]

Michael D=FCrig wrote:
>=20
> Regarding the stereo*.conf files which come along with Chromium I think=
=20
> there is an error in the calculation of the viewing frustum.
> Shouldn't it be
>=20
> # Projection matrix
> p =3D crmatrix.CRMatrix()
> if eye =3D=3D 0:
>   left =3D s * ((halfWidth * -aspect) + EyeSep);
>   right =3D s * ((halfWidth * aspect) + EyeSep);
> else:
>   left =3D s * (halfWidth * -aspect - EyeSep);
>   right =3D s * (halfWidth * aspect - EyeSep);
>=20
> instead of
>=20
> # Projection matrix
> p =3D crmatrix.CRMatrix()
> if eye =3D=3D 0:
>   left =3D s * ((halfWidth * -aspect) - EyeSep);
>   right =3D s * ((halfWidth * aspect) - EyeSep);
> else:
>   left =3D s * (halfWidth * -aspect + EyeSep);
>   right =3D s * (halfWidth * aspect + EyeSep);
>=20
>=20
> For the left eye the scene is shifted to the right by EyeSep. This=20
> results in a right shift of the corresponding near plane by s*EyeSep.
>=20
> I verified the above in our CAVE environment by displaying a vertical=20
> line exactly at the focal distance. Moving the line back and forth alon=
g=20
> the z-axis it will always display in negative parallax in the first=20
> case. In the second case however it will correctly display in=20
> negative/positive parallax depending on the z-coordinate being behind/i=
n=20
> front of the focal distance.

That sounds right.  I've checked in your changes.

-Brian