Where do i get the java debugging tools cause i am still quite fresh with
java..
Andy
----- Original Message -----
From: John D <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, December 24, 2000 9:33 PM
Subject: Re: [JAVA3D]
> At a glance, it does not look like you have
> instantiated each coordinates value in your for loop;
> you only instantiated the array itself. Come to think
> of it, you could not possibly be even entering the for
> loop or you would get a null-pointer exception when
> you try to set the x and y...bvol must be equal to
> zero. You really try try some of the java debugging
> tools, they probably would made this clear very
> quickly.
>
> --- Andy Tay <[EMAIL PROTECTED]> wrote:
> > This is a part of my source code for my project...
> > It is giving me alot of problem and i still couldn't
> > figure how to correct it.. Can any one help me.. It
> > is quite urgent cause my deadline is coming soon...
> >
> > private Geometry sphereGeometry() {
> >
> > int f;
> >
> > int r = 50;
> > int xc = 100;
> > int yc = 100;
> > int zc = 100;
> > 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*(60/100);
> >
> > Point3f[] coordinates;
> >
> > coordinates = new Point3f[bvol];
> >
> > for(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-r);
> > spany = (yc+r)-(yc-r);
> > spanz = (zc+r)-(zc-r);
> >
> > rx = (randx*spanx)+(xc-r);
> > ry = (randy*spany)+(yc-r);
> > rz = (randz*spanz)+(zc-r);
> >
> > if
> >
> (((rx-xc)*(rx-xc))+((ry-yc)*(ry-yc))+((rz-zc)*(rz-zc))
> > <= r) {
> > coordinates[f].x = rx;
> > coordinates[f].y = ry;
> > coordinates[f].z = rz;
> > }
> > }
> >
> > PointArray point = new PointArray(bvol,
> > PointArray.COORDINATES);
> > point.setCoordinates(0, coordinates);
> >
> > return point;
> >
> > } // end of method SphereGeometry in class Bone
> >
> > When i compile, it doesn't show any problem but when
> > i run, i show me this errors.... I really hope that
> > anyone out that can help me with this problem
> > thanks....
> >
> > java.lang.NullPointerException
> > at
> >
> javax.media.j3d.GeometryArrayRetained.setCoordinates<CompiledCode>
> > at
> >
> javax.media.j3d.GeometryArray.setCoordinates<GeometryArray.java:333>
> > at
> > FinalProject$Bone.sphereGeometry<Compiled Code>
> > at
> > FinalProject$Bone.<init><FinalProject.java:27>
> > at
> > FinalProject.createSceneGraph<FinalProject.java:114>
> > at
> > FinalProject.<init><FinalProject.java:142>
> > at java.lang.Class.newInstance0<Native
> > Method>
> > at
> > java.lang.Class.newInstance<Class.java:239>
> > at
> >
> sun.applet.AppletPanel.createApplet<AppletPanel.java:532>
> > at
> >
> sun.applet.AppletPanel.runLoader<AppletPanel.java:468>
> > at sun.applet.AppletPanel.run<Compiled
> > Code>
> > at java.lang.Thread.run<Thread.java:479>
> >
> > Andy
> >
>
>
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