7/23/01 4:44:56 PM, gaoming fu <[EMAIL PROTECTED]> wrote:
>
> I built some polyhedrons using IndexedTriangleArray, the normal for each
>vertex point is (0.0, -1.0, 0.0). I used the following code to set the
>appearance:
i don't really understand why you let all your normals point downwards? maybe
you want them to point inward?
you can also let java3d the normal calculation if you use the normalgenerator class
>
>Now my trouble is, if I keep zooming in, I can not see some sides of the
>polyhedrons. It seems that the normals changed. I do not have this trouble
>if I keep zooming out. I am not sure if this is normal problem, or lighting
>problem.
or maybe it is just a implementation bug of your opengl library
I noticed that the microsoft opengl driver doesn't clip right so you get some other
color shading (when clipping occurs (in your case when you zoom in fully)
maybe this bug is only with quads , I don't remember in detail anymore
mattie
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