[JAVA3D]

[Andy Tay]

This is a copy of my program and my intention is to create a sphere using points but when generate, i get all sorts of points all over the place.. It does not seems to look like a sphere at all.. I hope that anyone out there can help me.. I guess the generating of points lies on the sphereGeometry() section.. Thanks..       import java.applet.Applet; import java.awt.BorderLayout; import java.awt.Frame; import java.awt.event.*; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.universe.*; import javax.media.j3d.*; import javax.vecmath.*;   public class FinalProject extends Applet {       /////////////////////////////////////////////////     //     // create scene graph branch group     //     public class Bone extends Shape3D{    ////////////////////////////////////////////  //  // create Shape3D with geometry and appearance         // the geometry is created in method sphereGeometry         // the appearance is created in method sphereAppearance  //  public Bone() {               this.setGeometry(sphereGeometry());             this.setAppearance(sphereAppearance());    }  private Geometry sphereGeometry() {     int r = 2;   int xc = 4;   int yc = 6;   int zc = 4;   int v;   int bvol;   float rx, ry, rz, spanx, spany, spanz, randx, randy, randz;     bvol = ((xc+r)-(xc-r))*((yc+r)-(yc-r))*((zc+r)-(zc-r));     v = ((bvol*80)/100);     Point3f[] coordinates;     coordinates = new Point3f[v];     for (int i=0; i<v; i++)   {   coordinates[i] = new Point3f ();   //}     //for(int f=0; f<v; f++){    randx = 0.0f + (float) (Math.random() * 1.0f);    randy = 0.0f + (float) (Math.random() * 1.0f);    randz = 0.0f + (float) (Math.random() * 1.0f);      spanx = (xc+r)-(xc);    spany = (yc+r)-(yc);    spanz = (zc+r)-(zc);      rx = (randx*spanx);    ry = (randy*spany);    rz = (randz*spanz);    //+(zc-r);      //if (((rx-xc)*(rx-xc))+((ry-yc)*(ry-yc))+((rz-zc)*(rz-zc)) <= r) {     coordinates[i].x = rx;     coordinates[i].y = ry;     coordinates[i].z = rz;    //}   }     PointArray point = new PointArray(v, PointArray.COORDINATES);   point.setCoordinates(0, coordinates);           return point;    } // end of method SphereGeometry in class Bone    ////////////////////////////////////////////  //  // create Sphere geometry  //   private Appearance sphereAppearance () {        Appearance appearance = new Appearance();      PolygonAttributes polyAttrib = new PolygonAttributes();        polyAttrib.setPolygonMode(PolygonAttributes.POLYGON_POINT);      appearance.setPolygonAttributes(polyAttrib);        return appearance;    } // end of method sphereAppearance of class Bone       } // end of class Bone       /////////////////////////////////////////////////     //     // create scene graph branch group     //     public BranchGroup createSceneGraph() {    BranchGroup objRoot = new BranchGroup();         // Create the transform group node and initialize it to the       // identity.  Enable the TRANSFORM_WRITE capability so that       // our behavior code can modify it at runtime.  Add it to the       // root of the subgraph.       TransformGroup objSpin = new TransformGroup();       objSpin.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);         objRoot.addChild(objSpin);         objSpin.addChild(new Bone());         // Create a new Behavior object that will perform the desired       // operation on the specified transform object and add it into       // the scene graph.       Transform3D yAxis = new Transform3D();       Alpha rotationAlpha = new Alpha(-1, 4000);         RotationInterpolator rotator =           new RotationInterpolator(rotationAlpha, objSpin);       BoundingSphere bounds =           new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);       rotator.setSchedulingBounds(bounds);       objSpin.addChild(rotator);    // Let Java 3D perform optimizations on this scene graph.         objRoot.compile();    return objRoot;     } // end of CreateSceneGraph method of FinalProject       // Create a simple scene and attach it to the virtual universe       public FinalProject() {         setLayout(new BorderLayout());         Canvas3D canvas3D = new Canvas3D(null);         add("Center", canvas3D);           BranchGroup scene = createSceneGraph();           // SimpleUniverse is a Convenience Utility class         SimpleUniverse simpleU = new SimpleUniverse(canvas3D);    // This will move the ViewPlatform back a bit so the  // objects in the scene can be viewed.         simpleU.getViewingPlatform().setNominalViewingTransform();           simpleU.addBranchGraph(scene);     } // end of FinalProject constructor       //  The following allows this to be run as an application     //  as well as an applet       public static void main(String[] args) {         Frame frame = new MainFrame(new FinalProject(), 256, 256);     } // end of main method of FinalProject   } // end of class FinalProject