>Never mind, I got it.... You det the "false" to "true" in the
>PolygonAttributes....
Correct. This sets the backFaceNormalFlip attribute to true.
>Any way to make the inside a different color without defining a different
>polygon?
No. We looked into doing this and there is no clean/efficient way to do it.
You'll have to define two polygons. Make sure that they are wound opposite
from one another.
--
Kevin Rushforth
Java 3D Team
Sun Microsystems
[EMAIL PROTECTED]
>-----Original Message-----
>From: Bob Gray [mailto:[EMAIL PROTECTED]]
>Sent: Tuesday, November 23, 1999 1:37 PM
>To: [EMAIL PROTECTED]
>Subject: [JAVA3D] CULL_NONE?
>
>
>I have a polyhderon centered at the origin.
>
>I defined the PolygonAttributes of the appearance to be
>
>A.setPolygonAttributes(new PolygonAttributes(PolygonAttributes.POLYGON_FILL,
>
> PolygonAttributes.CULL_NONE,
>0.01f, false));
>
>I then set the front cull distance to be between the view platform and
>the polyhedron.
>
>As I zoom in on the polyhedron, the front cull plane will start to
>intersect the polyhedron and cut away at it, revealing the inside. Its
>a nice effect.
>
>But, the inside is all gray. It doesn't have the same color (or shades of
>the same color) as the outside.
>
>I thought by setting the PolygonAttributes to be PolygonAttributes.CULL_NONE
>that both sides of the polygons making up the polyhedron would have color.
>It
>doesn't work....
>
>So, how should I define the polyhedron so both inside and outside have the
>same color?
>
>I thought about doing some kind of norm vector inversion, but this would
>result
>in the outside of the polyhedron loosing its color, wouldn't it?
>
>And I thought about defining 2 Polyhedra; one with its normals pointing out
>and one
>with its normals pointing in. But that's an ugly thing to do!
>
>So how should I do it?
>
>Bob Gray
>
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