I create a dialog image box and assign it to the shape3D, then i add this shap3D under PlatformGeometry. So that the dialog always show over canvas3D.

ViewingPlatform ourView = su.getViewingPlatform();
pg = new PlatformGeometry();
pg.addChild(dialogShape3D);
ourView.setPlatformGeometry(pg);


Then i try to use pickCanvas for detection:

pickcanvas = new PickCanvas(canvas, pg);
pickcanvas.setModePickCanvas.GEOMETRY_INTERSECT_INFO);
pickcanvas.setTolerance(2.0f);      

But when i click the dialog the pickresult got null.

pickcanvas.setShapeLocation(mouseEvent);
PickResult pickresult = pickcanvas.getClosest();

Please advice on above case, thanks ^^

Hi All,

I try to save the scenegraph (include RotPosPathInterpolator node) by using SceneGraphStreamWriter. After i loading it again. I got following error meessage. Please give me some advice. Thanks.

P.S. There are no problems if the scenegraph didn't contain behavior node.


java.lang.NullPointerException
     at javax.media.j3d.Transform3D.set(Transform3D.java:1846)
     at javax.media.j3d.TransformInterpolator.<init>(TransformInterpolator.java:89)
     at javax.media.j3d.PathInterpolator.<init>(PathInterpolator.java:122)
     at javax.media.j3d.RotPosPathInterpolator.<init>(RotPosPathInterpolator.java:75)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.RotPosPathInterpolatorState.createNode(RotPosPathInterpolatorState.java:109)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.SceneGraphObjectState.readObject(SceneGraphObjectState.java:151)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.NodeState.readObject(NodeState.java:71)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.BehaviorState.readObject(BehaviorState.java:87)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.InterpolatorState.readObject(InterpolatorState.java:65)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.TransformInterpolatorState.readObject(TransformInterpolatorState.java:71)
     at com.sun.j3d.utils.scenegraph.io.retained.Controller.readObject(Controller.java:340)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.GroupState.readObject(GroupState.java:86)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.TransformGroupState.readObject(TransformGroupState.java:70)
     at com.sun.j3d.utils.scenegraph.io.retained.Controller.readObject(Controller.java:340)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.GroupState.readObject(GroupState.java:86)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.TransformGroupState.readObject(TransformGroupState.java:70)
     at com.sun.j3d.utils.scenegraph.io.retained.Controller.readObject(Controller.java:340)
     at com.sun.j3d.utils.scenegraph.io.state.javax.media.j3d.GroupState.readObject(GroupState.java:86)
     at com.sun.j3d.utils.scenegraph.io.retained.Controller.readObject(Controller.java:340)
     at com.sun.j3d.utils.scenegraph.io.retained.StreamControl.readBranchGraph(StreamControl.java:148)
     at com.sun.j3d.utils.scenegraph.io.SceneGraphStreamReader.readBranchGraph(SceneGraphStreamReader.java:91)
     at loader$2.actionPerformed(loader.java:222)
     at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
     at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
     at java.awt.Component.processMouseEvent(Unknown Source)
     at java.awt.Component.processEvent(Unknown Source)
     at java.awt.Container.processEvent(Unknown Source)
     at java.awt.Component.dispatchEventImpl(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Window.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)

thanks your reply and tutorials  

How about XJ3D? It is suitable for me? Since i just want to make animation base on the key frame geometry data which created from 3DSMax.

Please advice  

I am newbie of java3D. And i know like to get more advice from all of you about animation.

I try to use loader3DS (http://www.starfireresearch.com/) to load my 3ds model. It work fine. But animation can't since this loader didn't support animation and keyframe. I just know one method to make animation. By using 3dsMAX, i created the model and made the animation. Then export each frame one by one. Then i create a branchgroup and a switch in java. And load the files one by one by using loader3ds and add them to the switch. Then i can control the switch mask on and off to make animation. But seems not the good methods. So i try to use milkshape3D but this software only support skeleton animation. But it didn't work of my model since my model will not have any skeleton attach. So any other best way for loading animation. Thanks for your advice.