Only a branch group can be added at runtime!!

Question

only a branch group can be added at runtime!!, im just a beginner and im trying to draw some points taking the coordinates from jtextfield objects, and each time i want to draw point i get an exception
another issue, i have added some mouse behavior and when i draw the points (adding new branches) they appear but not rotated or translated with the behavior
any ideas to remove useless branches????

Answer 1

One way I have found to add things at runtime is to create a 'holder' object for it during compile time and then modify it while the program is running. For example, I want to dynamically create a LineArray based on some user action but I won't know what the action is till runtime.
LineArray lineArray = new LineArray(2, LineArray.COORDINATES);
lineArray.setCapability(LineArray.ALLOW_COORDINATE_WRITE);
myTransformGroup.addChild(new Shape3D(lineArray); //  Now the LineArray is part of the scene
///  This is the class you create that modifies the LineArray based on user interaction
MyCustomBehavior mcb = new MyCustomBehavior(lineArray, ......);
mcb.setSchedulingBounds(BOUNDS); // BOUNDS is defined somewhere else.
myTransformGroup.addChild(mcb);In the MyCustomBehavior class you can modify the lineArray based on user interaction. This is close to what I have done. My code is at home (and I am at work right now) so I cannot be totally sure this is exactly correct. :)
fitz