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".
