Re: My own billboard?

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Mario Veraart (rioj7++at++fel.tno.nl)
Wed, 14 Jan 1998 13:50:06 +0100 (MET)

>
> Hey folks,
>
> I need to implement my own "Billboard" so that I may articulate the
> geometry that I am "Billboarding".
>
> This geometry will be attached below a couple pfDCS's so it's coordinate
> system will be a bit different than the world coordinate system.
>
> O (pfScene)
> / \
> / \
> / O-----(pfDCS:myBillboard)
> / (pfDCS)
> /
> (eye)
>
> My problem is how do I come up with the angles in myBillboard coordinates
> that will make it face my eye?
>
> Any examples would be great.

You dont need to know this. Performer will calculate the angle needed
for an axis billboard or a point billboard. You just model that the
geometry of the billboard is visible looking from a point on the
positive y-axis towards the origin.

Mario
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