How to do this with Java3d in a Applet

Engines, Libraries and Tools Java 3D
#1

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!

#2

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):


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?

#3

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)