Are you sure you're passing in a brand new BranchGroup every call? Also,
which call to addChild is giving you the exception? vrmlTrans.addChild or
objGroup.addChild? Try putting print statements between the lines to find
out, like this: System.err.println("got this far");
Hope this helps.
-Guillermo Gutierrez
Andreea Francu wrote:
> I'm trying to write a method that will add a vrml object to a BranchGroup.
> The vrml object is loaded in another class and is given to the method as a
> BranchGroup parameter. The problem appears when I try to add more than one
> vrml objects. Then I get the following exception:
> javax.media.j3d.MultipleParentException:Group.addChild: child already has
> a parent
>
> Does anybody know how can I avoid getting this error?
>
> Here is the relevant code:
>
> public void addVRML(Point3d placePoint, BranchGroup vrmlbg)
> {
> placePoint_ = placePoint;
> BranchGroup objGroup = new BranchGroup();
>
> Transform3D transformation = new Transform3D();
> transformation.setTranslation(new Vector3d(placePoint_.x,
> placePoint_.y,
> placePoint_.z));
>
> TransformGroup vrmlTrans = new TransformGroup(transformation);
> vrmlTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
> vrmlTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
> vrmlTrans.setCapability(TransformGroup.ALLOW_CHILDREN_EXTEND);
> vrmlTrans.setCapability(TransformGroup.ALLOW_CHILDREN_READ);
> vrmlTrans.setCapability(TransformGroup.ALLOW_CHILDREN_WRITE);
>
> objGroup.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
> objGroup.setCapability(BranchGroup.ALLOW_CHILDREN_READ);
> objGroup.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
>
> vrmlTrans.addChild(vrmlbg);
> objGroup.addChild(vrmlTrans);
>
> scene_.addChild(objGroup);
> }
>
> ******************************************************************
> * Andreea Francu *
> * Graduate Student *
> * CAIP Center, Rutgers University *
> * 96 Frelinghuysen Rd., Piscataway, NJ, 08854 *
> * [EMAIL PROTECTED] http://www.caip.rutgers.edu/~afrancu/*
> ******************************************************************
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