Re: [JAVA3D] getting shape from vrml and finding the points

[SUBSCRIBE JAVA3D-INTEREST Nazrul]

* Sorry for the last mail I accidentally pressed send button (I wanted
to use the tab key to move some text but is went to the send button).

Question:
But what happen if the Scene is live and the capability of the Shpe3D is
not set to ALLOW_GEOMETRY_READ.

How can you get the Geometry now, because you can not set capability
of a live or compiled objects.

I will very happy if some one can help me on this I been on the same
problem for the past 4 weeks.

If you want to see my code plese mail me

Thanks, Bye.


On Mon, 10 Jan 2000 08:25:01 -0800, Decker, Scott D <[EMAIL PROTECTED]> wrote:

>Well, if you have the shape DEF'd in the vrml file, it will be easier =)
>
>Let us say that the DEF'd object's name is CubeShape
>
>do
>Hashtable hash = Scene.getNamedObjects();
>
>Object rootObj = hash.get("CubeShape");
>
>//now you must start doing some testing
>//usually the rootObj will be a branchgroup, test it first
>
>if (rootObj instanceof BranchGroup){
>        BranchGroup bgRoot = (BranchGroup)objRoot;
>
>        //next, the next child is usually a transform group, but again,
>        //it could also be the shape right underneath it
>
>        Object childObject = bgRoot.getChild(0);
>        if (childObject instanceof TransformGroup){
>                TransformGroup tgRoot = (TransformGroup)childObject;
>                //now, again, the next item should be the child
>                Object tmpObject = tgRoot.getChild(0);
>
>                if (shapeObject instanceof Shape3D){
>                        Shape3D shapeObject = (Shape3D)tmpObject;
>
>                        //now get the geometry
>                        Geometry geomShape = shapeObject.getGeometry();
>                        //yeah, you now have the geometry
>                }
>        }
>}
>
>now, the problem here is that, you never know if the child to parent
>relationships are going to be like this.  You could use Daniel Selman's tree
>object, load up the vrml object, see how the tree structure looks to get to your
>vrml shape, and then write the code to get to it.  Or, you could do almost
>exactly what he did in code and just build tree traversers, so you get the main
>object from the hashtable, then start testing to see if it is a shape3D.  If it
>isn't cast it to it's object type, then get all of it's children and go
>recursively through them until you find a shape3d. Once you find the shape3d you
>can get the geometry.
>
>Hope that helps
>Scott
>
>
>Scott Decker
>Research Scientist
>Pacific Northwest National Labs
>[EMAIL PROTECTED]
>please feed the squirrels

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