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  How to do this with Java3d in a Applet  (Read 1094 times)
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Offline Brook_Lee

Senior Newbie




Java games rock!


« Posted 2003-04-03 06:48:18 »

if we select cone in ComboBox,the Applet draws a cone in the Canvas,if we select ColorCube in the same ComboBox,the Applet draws a ColorCube in the Canvas.
Maybe it's easy,i am a beginner .
thanks for your post!
Offline misterX

Junior Devvie




java forever!


« Reply #1 - Posted 2003-04-13 18:17:52 »

huh, nobody answers?

hi, since nobody answer, i'll try, but i'm not very experienced either, so i hope what i say is right.


what you need:
- a onComboChange(...) method
- a TG or BG with capabilities ALLOW_CHILDREN_WRITE and ALLOW_CHILDREN_EXTEND
- the corresponding Cube & Cone nodes.

Then, simply (pseudo-code):
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void init() {
    Group myRoot = new BranchGroup();
    myRoot.setCapability(...);

    myCube = makeCube();
    myCone = makeCone();
}


void onComboChange(...) {
    myForm = (myCube or myCone)

    if (currentForm == null)
         myRoot.insertChild(myForm, 0);
    else
         myRoot.setChild(myForm, 0);

    currentForm = myForm;
}



hmm... should work. shouldn't it?
Offline Brook_Lee

Senior Newbie




Java games rock!


« Reply #2 - Posted 2003-04-13 23:18:58 »

Maybe it works well,i did not try .
Fortunately,I found a way to solve this problem.
it works in such way:

BranchGroup parent_Group=new BrahcnGroup();
praent_Group.setCapability(BranchGroup.ALLOW_DETACH);
and some other capability:
praent_Group.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
...
then,
before you add child Group,clear up the parent_Group
parent_Group.removeChild(index);
last,
add you child Group
parent_Group.addChild(child_Group)
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