Re: [JAVA3D] Making a starfield Background with PointArray

[Nathan Bower]

Im not sure this will work, but its worth trying   PointArray starGeom1 = new PointArray(7, PointArray.COORDINATES);                  Appearance starAppear1 = new Appearance(); starGeom1.setCoordinate( 0, new Point3f( 0.79483311f, -0.58810995f,  0.14955615f));   starGeom1.setColor (index, new Color3f(blah,blah,blah));     It appears that this should work, because I have used the following code before :    for (int x = 0; x < L; x++)      for (int y = 0; y < L; y++){               land.setCoordinate ((x * L) + y, new Point3f (x * interpolation,  y * interpolation,  sampled_DTM.DTM [x][y] / (50f / mag)));               land.setColor ((x * L) + y, color);      }       Can you tell me where you got the information on the stars from? Is this data freewear? I would find this data usefull for a project I am currently working on...     ----- Original Message ----- From: Corysia Taware To: [EMAIL PROTECTED] Sent: Tuesday, May 08, 2001 10:29 PM Subject: [JAVA3D] Making a starfield Background with PointArray I'm making a starfield for my background.  I was looking at some of the examples in the Tutorial and came across this:   PointArray starGeom1 = new PointArray(7, PointArray.COORDINATES);                  Appearance starAppear1 = new Appearance(); starGeom1.setCoordinate( 0, new Point3f( 0.79483311f, -0.58810995f,  0.14955615f)); starGeom1.setCoordinate( 1, new Point3f( 0.44430932f, -0.55736839f, -0.70137505f)); starGeom1.setCoordinate( 2, new Point3f( 0.94901367f, -0.30404968f,  0.08322775f)); starGeom1.setCoordinate( 3, new Point3f( 0.68060123f, -0.43044807f,  0.59287173f)); starGeom1.setCoordinate( 4, new Point3f(-0.11641672f,  0.47273532f,  0.87348049f)); starGeom1.setCoordinate( 5, new Point3f(-0.10399289f, -0.98059412f,  0.16619437f)); starGeom1.setCoordinate( 6, new Point3f( 0.08024400f, -0.96944100f, -0.23182900f)); PointAttributes point1 = new PointAttributes(4.0f, false); starAppear1.setPointAttributes(point1); objRoot.addChild(new Shape3D(starGeom1, starAppear1));   This looked liked what I needed, at first.  However, it seems that I can only set one appearance per point.  The data that I have currently is the (x,y,z) of the star and a magnitude value.  I suppose I can round off the magnitude values and create geometry in "clumps" of similiarly bright stars, but I'd also like to add in color -- if I can find the data.  Does anyone have any suggestions?  Currently, I've got realistic data for 2000 stars visible to us from Earth.