Re: [JAVA3D] Static scene vs. Camera navigated scene

[Ian Wang]

Thanks Joachim, Xiaowen, and Thomas for your kind helps.   Joachim suggested to use Billboard, I believe it works. However, the text label (caption) will not be a completely fixed caption. It appears rotating back and forth a bit (not so stationary).   Thomas' method should work. I compiled your code, and it runs well. In my case, I didn't use keyNavigator. So I tried Xiaowen's suggestion first.   Xiaowen suggested to use ViewingPlatform.setPlatformGeometry() method to attach the caption to the ViewingPlatform of a SimpleUniverse. I did it as follows. No error message. But I cannot see my caption. How can I bring it in front of my eyes? Should I attach a BranchGroup node or a TransformGroup node?       .....     SimpleUniverse simpleU = new SimpleUniverse(canvas3D);     PlatformGeometry pg = new PlatformGeometry();     pg.addChild(setCaption());     ViewingPlatform vp = simpleU.getViewingPlatform();     vp.setPlatformGeometry(pg);     BranchGroup scene = createSceneGraph();     simpleU.addBranchGraph(scene);     .....         public BranchGroup setCaption()     {         BranchGroup captionBG = new BranchGroup();         TransformGroup captionTG = new TransformGroup();          String fontName  = "TestFont";         String textString ="This is my Caption";         float len = textString.length();            Color3f textColor = new Color3f(0.7f, 0.8f, 0.6f);         Material text = new Material(textColor,CONSTANTS.black,textColor,                   CONSTANTS.white,100.0f);           text.setLightingEnable(true);            Appearance appearText = new Appearance();         appearText.setMaterial(text);             Line2D.Float height = new Line2D.Float(0.0f, 0.0f, 1.2f, 0.0f);         Font3D f3d = new Font3D(new Font(fontName,Font.PLAIN,2),                   new FontExtrusion(height));         Text3D txt = new Text3D(f3d,textString,                   new Point3f(-(len-1)/2,8.5f,0.0f),Text3D.ALIGN_FIRST, Text3D.PATH_RIGHT);            Shape3D textShape = new Shape3D();         textShape.setGeometry(txt);           textShape.setAppearance(appearText);            Transform3D tex = new Transform3D();         tex.set(new Vector3f(50.0f, 50.0f, 222.0f));  <----- location of my caption         captionTG.setTransform(tex);            captionTG.addChild(textShape);         captionBG.addChild(captionTG);         return captionBG;      } I guess I didn't use the correct TransformGroup. Ian Wang >From: "Wang, Lihui" <[EMAIL PROTECTED]> >Reply-To: Discussion list for Java 3D API <[EMAIL PROTECTED]> >To: [EMAIL PROTECTED] >Subject: [JAVA3D] Static scene vs. Camera navigated scene >Date: Fri, 16 Nov 2001 14:43:24 -0500 > >Hello, > >I have a scene graph attached to a Simple Universe. By manipulating a >camera's TransformGroup obtained through >SimpleU.getViewingPlatform().getViewPlatformTransform(), It is possible to >do a camera-based navigation through my Java 3D scene. > >Now, I want to add a stationary background with a static Text3D label to the >same Canvas3D, but not to be affected by the camera's viewpoint. It means >that no matter where the viewpoint is and no matter what the camera's >orientation is, the background and the text label remain stationary to the >viewer. > >Could somebody kindly give me a hint of how to do it? Is it possible to >detach the ViewPlatform from the SimpleUniverse and attach it to a lower >node, so the higher part of the scene graph may become stationary? > >Thanks. > >Ian Wang