Hello Warning: Bad English ahead.
On Sunday 01 August 2004 05:26, you wrote: > this is my first message to this interest group, so please excuse any lack > of etiquette . Don't worry, there's no special etiquette here. But you should search the archives for the "[JAVA3D] New Java 3D interest list -- [EMAIL PROTECTED]"-message. > I would like to add extra objects to the environment after compile time, to > represent the actual weld as it moves across the metal, but I have > absolutely no idea how to do this, or even if it can be done. First read the docs for "BranchGroup" and "Group". What you have to do before compiling/showing anything on the screen: Create a BranchGroup WELD and call: WELD.setCapability(WELD.ALLOW_CHILDREN_EXTEND); WELD.setCapability(ALLOW_CHILDREN_READ); WELD.setCapability(ALLOW_CHILDREN_WRITE); attach WELD to the scene-graph at a "good" position, compile the whole thing (the metal-box and the rest) and show it. If you want to add a bit later: TransformGroup TG = new TransformGroup (); TG.setTransform(transform_to_the_right_position_realtive_to_WELD); TG.addChild (the_thing_representing_the_weld_bit); WELD.addChild(TG); The trick is to tell java3d BEFORE compiling/setting live that later where will be changes in the BranchGroup by calling setCapability. You have to use setCapability for a lot of things, like for: changing textures/colors, removing stuff (BranchGroup.ALLOW_DETACH => BranchGroup.detach()), picking (for finding out what the user clicked on ALLOW_PICKABLE_READ, ALLOW_PICKABLE_WRITE, ENABLE_PICK_REPORTING + some stuff in GeometryArray), or collision detection (ENABLE_COLLISION_REPORTING). For your problem i would have a look at: PickCanvas (The user clicks on something and PickCanvas figures out what it was an where, use GEOMETRY_INTERSECT_INFO) Box.getShape(...) (For marking the shapes as pickable and the geometry readable to PickCanvas) good luck & cu =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
