Re: [JAVA3D] Change background color of Canvas3D

[Raghavendra R]

Hi,


I am calling the repaint method from a method "PrintImage". I have used
the piece of code in "http://www.j3d.org/faq/capturing.html";. I tried
setting the Canvas background color and also tried to get Graphics2D
from the BufferedImage and set the color etc, but still the background
remains black.

PrintImage()
{
myCanvas.repaint()
}

RenderCanvas extends Canvas3D
{
postSwap()
{
         GraphicsContext3D  ctx = getGraphicsContext3D();
         Rectangle rect = getBounds() ;

         Raster ras = new Raster(new Point3f(-1.0f,-1.0f,-1.0f),
Raster.RASTER_COLOR, 0, 0, rect.width,
              rect.height, new ImageComponent2D(ImageComponent.FORMAT_RGB,
                   new BufferedImage(rect.width, rect.height,
BufferedImage.TYPE_INT_RGB)), null);

         BufferedImage img = ras.getImage().getImage();

         try
         {
            FileOutputStream out =
            new FileOutputStream("images/Capture"+postSwapCount_+".jpg");
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(img);
            param.setQuality(0.9f, false);
            encoder.setJPEGEncodeParam(param);
            encoder.encode(img);
            writeJPEG = false;
            out.close();
         }
         catch (IOException e)
         {

         }
}
}

Shouldn't i be setting the background color of the Canvas3D before
calling the repaint method or can we swap the colors in the BufferedImage?

Thanks
Raghav


David Bourgais wrote:

> Hi !
>
> To change your background color, you sohould use this :
>
> float coul1, coul2, coul3; /*In french, coul for couleur (couleur =
> color in perfect english)*/
> Background bg = new Background(coul1, coul2, coul3);
> bg.setCapability(bg.ALLOW_COLOR_READ);
> bg.setCapability(bg.ALLOW_COLOR_WRITE);
> bg.setApplicationBounds(/*your BoundingSphere*/);
> YourScene.addChild(bg);
> //Changing the background color
> float a, b, c;
> bg.setColor(a,b,c);
>
> I hope that it will help you.
>
> David Bourgais
>
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