I have a scene graph and need to label certain parts of it for the user to see. After trying billboards and being unsatisfied with the results, I tried using rasters, which were much faster and looked much nicer. However, they are suffereing from the same problem that my billboards were - when viewed from certain angles, my labels twist to partially embed themselves in nearby geometry. Since these are labels and should sit on top of any geometry, it would be nice to set the depth they write into the depth buffer to be it's minimum. However, no matter what data I write into my DepthComponent, the depth written into the buffer is the same as the raster's root position in my scene graph.
Any ideas how to get my raster to do what I want? I've tried both integer and float depth components.
//Create raster image of label
Image labelImage =
AppImageLoader.instance().getImage(AppImageLoader.IM_AUTO_REF_LOGO);
int width = labelImage.getWidth(null);
int height = labelImage.getHeight(null);
BufferedImage bi = new BufferedImage(width, height,
BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g = bi.createGraphics();
g.drawImage(labelImage, 0, 0, null);
g.dispose();ImageComponent2D ic = new ImageComponent2D(ImageComponent.FORMAT_RGBA, bi);
//Create foreground depth buffer
DepthComponentFloat dc = new DepthComponentFloat(width,
height);
float[] depthData = new float[width * height];
for (int i = 0; i < width * height; i++)
{
depthData[i] = 0f;
}
dc.setDepthData(depthData); //Build raster
javax.media.j3d.Raster raster = new javax.media.j3d.Raster(
new Point3f(0f, 0f, 0f),
javax.media.j3d.Raster.RASTER_COLOR_DEPTH,
0, 0, width, height, ic, dc);
raster.setClipMode(javax.media.j3d.Raster.CLIP_IMAGE);Shape3D labelShape = new Shape3D(raster);
Mark McKay
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