Hi,

On Saturday 26 May 2007, Harald JOHNSEN wrote:
> Are we talking about the matrices used for the culling and the rendering
> ? If that's the case then we don't need precision for culling and the
> gpu does nothing with doubles, they have allready some trouble to use
> floats efficiently.
These are also the matrices that control the transform from and back to the 
view.
You will get jitter if these are floats.
Remember the jittering aircraft models in earlier days ...
The workaround was a complex logic to carry that scenery center with you.
Having doubles in the transform matrices is a much simpler and cleaner 
solution - without scenery center ...

What double precision problems do you have?

   Greetings

         Mathias

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