I hope u saw the code working Kelvin.
But the problem is can I not add this Geometry to the Background node?
I have tried using a Sphere for setting the Geometry as in the demo example
BackGroundGeometry.java where I used my gradient image instead of the sky
image but I don't get a very good gradient with it.
Please tell me if I can use any other geometry other than the sphere to set
the geometry to a background.
----- Original Message -----
From: "Kevin Glass" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, February 13, 2003 8:46 PM
Subject: Re: [JAVA3D] Creating a Background with a color gradient
> I will try it as soon as I get home to a computer I can use.
>
> However, I notice you're geometry has gone back to being 1.0 in scale,
> instead of 0.5. Also, the Z coordinate of your geometry must be set
> otherwise you'll be creating your rectangle at the same spot of the view
> is "standing", which isn't going to help.
>
> Kev
>
> > 1.Yes,I have tried using just one color instead of using a gradient.
> > 2.Now,I did as u suggested.:
> > a>From the code ,removed the part to set the Normals.
> > b>Changed the vertices to the one u suggested.
> > It still does not work.
> > Instead if I add the same branch group to the objRoot,I get the desired
> > effect but is is just a geometry added to the scenegraph whereas I want
> > the geometry to be set to the background node.I want the background to
> > be as far as possible.
> > Here is the code in which I can add the QuadArray as a geometry to
> > objRoot .Plz see it's working.
> > I am not able to add this same geometry to the Background node,why?
> >
> >
> >
> > import java.applet.Applet;
> > import java.awt.BorderLayout;
> > import java.awt.event.*;
> > import java.awt.Color;
> > import java.awt.GraphicsConfiguration;
> > import com.sun.j3d.utils.applet.MainFrame;
> > import com.sun.j3d.utils.geometry.*;
> > import com.sun.j3d.utils.geometry.ColorCube;
> > import com.sun.j3d.utils.universe.*;
> > import javax.media.j3d.*;
> > import javax.vecmath.*;
> >
> > public class HelloUniverse extends Applet {
> >
> > private SimpleUniverse u = null;
> > Color3f white = new Color3f(1.0f,1.0f,1.0f);
> > Color3f blue = new Color3f(0.0f,0.0f,1.0f);
> >
> > private final float[] vertices ={ 1.0f,-1.0f,0.0f,
> > 1.0f, 1.0f,0.0f,
> > -1.0f, 1.0f,0.0f,
> > -1.0f,-1.0f,0.0f};
> >
> >
> >
> > public BranchGroup createSceneGraph() {
> >
> > BranchGroup objRoot = new BranchGroup();
> >
> > TransformGroup objTrans = new TransformGroup();
> > objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
> > objRoot.addChild(objTrans);
> >
> > // Create a simple Shape3D node; add it to the scene graph.
> > objTrans.addChild(new ColorCube(0.4));
> >
> > Transform3D yAxis = new Transform3D();
> > Alpha rotationAlpha = new Alpha(-1, 4000);
> >
> > RotationInterpolator rotator =
> > new RotationInterpolator(rotationAlpha, objTrans, yAxis,
> > 0.0f, (float) Math.PI*2.0f);
> > BoundingSphere bounds =
> > new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
> > rotator.setSchedulingBounds(bounds);
> > objRoot.addChild(rotator);
> >
> > BranchGroup branch = new BranchGroup();
> > branch.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
> > branch.setCapability(BranchGroup.ALLOW_CHILDREN_READ);
> > branch.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
> >
> >
> > Shape3D rectangle = new Shape3D();
> >
> >
> > rectangle.setCapability(Shape3D.ALLOW_GEOMETRY_READ);
> > rectangle.setCapability(Shape3D.ALLOW_GEOMETRY_WRITE);
> > rectangle.setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
> > rectangle.setCapability(Shape3D.ALLOW_APPEARANCE_READ);
> > rectangle.setCapability(Shape3D.ALLOW_APPEARANCE_OVERRIDE_WRITE);
> > rectangle.setCapability(Shape3D.ALLOW_APPEARANCE_OVERRIDE_READ);
> > rectangle.setCapability(Shape3D.ALLOW_LOCAL_TO_VWORLD_READ);
> >
> > QuadArray aQuadArray = new
> > QuadArray(4,QuadArray.COORDINATES|QuadArray.COLOR_3);
> > aQuadArray.setCapability(QuadArray.ALLOW_COLOR_READ);
> > aQuadArray.setCapability(QuadArray.ALLOW_COLOR_WRITE);
> > aQuadArray.setCapability(QuadArray.ALLOW_COORDINATE_WRITE);
> > aQuadArray.setCapability(QuadArray.ALLOW_COORDINATE_READ);
> >
> >
> > aQuadArray.setCoordinates(0,vertices);
> >
> > aQuadArray.setColor(0,white);
> > aQuadArray.setColor(1,blue);
> > aQuadArray.setColor(2,blue);
> > aQuadArray.setColor(3,white);
> >
> > rectangle.setGeometry(aQuadArray);
> > branch.addChild(rectangle);
> > Background background = new Background();
> > background.setApplicationBounds(bounds);
> > background.setCapability(Background.ALLOW_GEOMETRY_READ);
> > background.setCapability(Background.ALLOW_GEOMETRY_WRITE);
> > /*These lines do not give the result
> > background.setGeometry(branch);
> > objRoot.addChild(bg);*/
> > /*Instead Here if I add the branchgroup I can see the effect*/
> > objRoot.addChild(branch);
> > objRoot.compile();
> > return objRoot;
> >
> > }//end of function createScenegraph
> >
> > public HelloUniverse() {
> >
> > }//end of constructor
> >
> > public void init() {
> >
> > setLayout(new BorderLayout());
> > GraphicsConfiguration config =
> > SimpleUniverse.getPreferredConfiguration();
> >
> > Canvas3D c = new Canvas3D(config);
> > add("Center", c);
> >
> > // Create a simple scene and attach it to the virtual universe
> > BranchGroup scene = createSceneGraph();
> > u = new SimpleUniverse(c);
> >
> > u.getViewingPlatform().setNominalViewingTransform();
> >
> > u.addBranchGraph(scene);
> > }//end of init
> >
> > public void destroy() {
> >
> > u.removeAllLocales();
> >
> > }//end of destroy
> >
> >
> > public static void main(String[] args) {
> > new MainFrame(new HelloUniverse(), 256, 256);
> > }//end of main
> >
> >
> > }//end of class
> >
> >
> >
> > ----- Original Message -----
> > From: "Kevin Glass" <[EMAIL PROTECTED]>
> > To: <[EMAIL PROTECTED]>
> > Sent: Thursday, February 13, 2003 1:15 PM
> > Subject: Re: [JAVA3D] Creating a Background with a color gradient
> >
> >
> >> By single colour I actually meant using just one colour on your
> >> vertices. Instead of attempting to get a gradient.
> >>
> >> Also are your normals right, I mean the vector(0.0,0.7,0.7). You using
> >> nominal viewing transform, which means +Z goes into the screen (is
> >> that right anyone?). First off this means that your normals wouldn't
> >> point towards the screen.
> >>
> >> I also think you're vertices are a bit dubious. You want this
> >> background to appear infront of you? As far as possible away? I'd go
> >> for something like this:
> >>
> >> private final float[] vertices =
> >> {-0.5f, -0.5f, 0.5f,
> >> 0.5f, -0.5f, 0.5f,
> >> 0.5f, 0.5f, 0.5f,
> >> -0.5f, 0.5f, 0.5f};
> >>
> >> This should form a rectangle on the Z axis as far back into the screen
> >> as possible? I suggest either not setting the normals, or setting them
> >> to to (0.0,0.0,-1.0)
> >>
> >> HTH,
> >>
> >> Kev
> >>
> >> > Single color->U mean setting a color to the background and then
> >> adding the background node to objRoot.Yes ,I tried that and it works
> >> .
> >> >
> >> > Also,about the geometry I have tried changing the coordinates of the
> >> QuadArray.
> >> > Note: vertices array was changed to->
> >> > private final float[] vertices =
> >> > { 0.5f,0.0f,0.0f, 0.0f, 0.5f,0.0f, -0.5f, 0.0f,0.0f,
> >> > 0.0f,-0.5f,0.0f};
> >> > It still does not work .
> >> > Can u suggest something,please.
> >> > P.S:I got another reply about creating an image having color
> >> > gradient,with Buffered Image.I have used that and it was a succesful
> >> process but there are some speed issues due to which I cannot use
> >> this method.
> >> >
> >> >
> >> > ----- Original Message -----
> >> > From: "Kevin Glass" <[EMAIL PROTECTED]>
> >> > To: <[EMAIL PROTECTED]>
> >> > Sent: Wednesday, February 12, 2003 5:43 PM
> >> > Subject: Re: [JAVA3D] Creating a Background with a color gradient
> >> >
> >> >
> >> </SNIP>
> >>
> >> --
> >> Jose UML - http://www.newdawnsoftware.com/jose
> >> Pondering RPG - http://pondering.newdawnsoftware.com
> >>
> >>
> >
===========================================================================
> >> 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".
> >
> >
===========================================================================
> > 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".
>
>
> --
> Jose UML - http://www.newdawnsoftware.com/jose
> Pondering RPG - http://pondering.newdawnsoftware.com
>
>
===========================================================================
> 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".
===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
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