If the situation is as David has described, then the "problem" lies
in how the triangle strip array has been created. Java 3D, Open GL,
and other 3D graphics rendering systems cull polygonal surfaces
by default. It seems as though the "holes" are individual triangles
of the strip with the vertices defined in the opposite order as the
rest of the strip.
The easy way to determine if this is the problem is to turn of backface
culling. The culling is set in the PolygonAttributes NodeComponent.
The following four lines of code create a PolygonAttributes object and
sets the culling to CULL_NONE, and so forth.
PolygonAttributes polyAppear = new PolygonAttributes();
polyAppear.setCullFace(PolygonAttributes.CULL_NONE);
Appearance twistAppear = new Appearance();
twistAppear.setPolygonAttributes(polyAppear);
This code is taken from Chapter 2 of the Java 3D Tutorial. In the
last section of the tutorial, the determination of polygonal faces
is explained along with complete code example programs.
If CULL_NONE make the holes disappear, then the solution is to
change the way in which the vertices are defined in the triangle
strip array. Consult chapter 2 for more information.
If CULL_NONE does not make the holes disappear then there is a
different problem.
cheers,
Dennis
David HALLE wrote:
>
> Hi,
> I had this bug too. If you put your viewplatform under
> the surface of your TriangleStripArray, you should see
> the face the your holes and holes in place of the face
> you were seeing. You may change the polygonattributes
> of the appearance of your Shape(and create it if you
> don't have one yet).
> May be not the right solution, but I can't see
> anything else.
> good luck,
>
> ===
> David.
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--
-----
Dennis J Bouvier
[EMAIL PROTECTED]
Find the Java 3D Tutorial "Getting Started with the Java 3D API" at
http://sun.com/desktop/java3d/collateral
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