Nacho Sanz-Pastor Computer Arts + Developments VISSIM Div. (nacho++at++comarts.es)
Mon, 6 Feb 95 18:02:42 GMT
> I have a Performer 1.2 application for a flight simulator in which
>we have 3D models flying over a polygonal terrain grid. Performer only
>handles our models, the terrain is draw with GL in our draw callback.
>We now need a 2D overview mode where we look down on the scene from
>above, but for this mode we want to display a scanned map rather than
>the terrain grid.
>
>We are working on an Indigo2 Extreme and realize that software texture
>mapping would be too slow. Does anyone know a way I can accomplish this?
>Since all models will always be above the terrain, perhaps I could simply
>throw a raster background up before the models. Is there a Performer, GL,
>or X-windows way to do this. We are using IRIX 5.2.
Hi, Mike.
Sounds like the best way to do the display is make a lrectwrite gl call
instead of the screen clear in the PreDraw for that channel, painting a
2D image in the background before you draw any geometry.
Depending on the size of the window, frame rate should be ok with that.
Best regards,
Nacho Sanz-Pastor nacho++at++comarts.es
Computer Arts & Developments
Anita Vindel 10 bajo
28023 Madrid Spain
tel ++ 34 1 357 27 51 fax ++ 34 1 307 03 39
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Computer Arts & Developments Visual Simulation Group
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