Ron Parker schrieb in Nachricht ...
>I think there's a fundamental misunderstanding here about how isosurfaces
>work.  It's not as though we're tesselating the thing at render time or
>something.  There's no "shape" to save or reuse.


I know that it's not tessellated. Talking of the "shape" was probably not
that good. But the function forming the isosurface is calculated and the
most accurate point is found where a given ray intersects the object. This
is information which is needed in every render of the scene containing the
isosurface (at a given location). As long as the  camera does not move nor
the Iso, the result should be the same. Of course the actual color of that
"point" depends on other things in the scene and the Iso might be hidden by
other objects, too. But those intersection points could be reused, I think.
There is an isosurface cache already, isn't it? Perhaps it would suffice or
at least help to save and load  its contents?
I don't want to calculate the iso once and forever to use it in any given
scene. I just thought it would be good to reuse isosurface calculations from
one render in following once - just like radiosity data.
Don't know. Perhaps it's total nonsense.

Marc-Hendrik

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