Re: Billboarding in Quesa?

[Dair G. <da...@re...>]

James Dessart wrote:

>Is it possible to do billboarding in Quesa? I noticed it was mentioned=20
>in the transparency thread, but I'm not sure how to go about doing it=20
>with Quesa, and I'd like to.

See createTestRasterize() in Geom Test.c: if you submit a
Q3RasterizeCameraTransform object, the x and y coordinates of vertices
are treated as pixel coordinates (with z allowing an offset).

That's more intended for GUI overlays - it might be useful to have a
more 3D-style billboard, that would maintain some orientation to the
camera while remaining fixed in other dimensions. E.g., a tree that
would rotate around the y axis to face the camera position, while
remaining fixed around z and x.

Don't know if that would be best as some kind of transform that would
position any type of geometry, or as a new geometry type (the latter
would be a textured quad, while the former would let you do both a
textured quad and something more complex).


-dair
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