> Date: Mon, 3 Jun 2002 17:14:15 +0000 > From: Jayasree Tangirala <[EMAIL PROTECTED]> > > I am trying to depict some world coordinates onto the java3d screen. I tried > to transform it suitably so that they fit onto the screen but it does not > seem to work. I am trying to depict the data on a 700 x 700 window.
If you use SimpleUniverse and all the defaults, then you can call ViewingPlatform.setNominalViewingTransform() to move the view platform back on along +Z. This looks at the field of view (default 90 degrees) and figures out how much the view platform has to move back to fully display the range [-1.0 .. +1.0] in virtual units, at the virtual world origin, across the width of the window. You're looking down the -Z axis of the virtual world by default, with +X going to the right and +Y going up, so make sure your objects of interest are at Z values that less than view platform origin. Also check to see if your front and back clip planes are set appropriately and your objects are not getting clipped out (use the VIRTUAL_EYE clipping policies to make this easier). If you need to see more of the scene, move the view platform back some more. You can also widen the field of view, but this will lead to distortion at the wider angles. Hope that gets you going -- the dreaded blank screen can be tough to deal with. The OpenGL redbook gives some tips in this domain that might apply to Java 3D; see Chapter 3, "Troubleshooting Transformations". -- Mark Hood =========================================================================== 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".
