Another option is to set your geometry into you PlatformGeometry. So it will
move alongside your câmera. Nice for HUD.
See the java3d demo at:
${JAVA_HOME}/demo/java3d/PlatformGeometry/SimpleGeometry.javaAlessandro --- Mike Pilone <[EMAIL PROTECTED]> escreveu: > Scott, > > You have a couple of options. You could draw on the J3Dgraphics2D object in > a Canvas call back. This would probably be the simplest approach, but there > are a few outstanding bugs with J3Dgraphics2D. > > Another option would be to use an OrderedGroup and simple line geometry in > the scene, and disable depth testing for the lines. This can get tricky > because you will need to project the points into the scene to get them > infront of your front clipping plane. > > Another option is to use one of the publicly available HUD packages, or roll > your own. The trick is to use a texture mounted on the view side of the > scenegraph and update the image on the texture. I think this is what > J3Dgraphics2D is doing for you in the background. > > -mike > > > -----Original Message----- > From: Discussion list for Java 3D API [mailto:[EMAIL PROTECTED] > On Behalf Of Scott Hong > Sent: Thursday, August 05, 2004 8:56 AM > To: [EMAIL PROTECTED] > Subject: [JAVA3D] How to draw lines that are always on top of Canvas3D > > Hi, > > I am trying to draw lines that are always displayed on > > top of Canvas3D. The lines should be visible no matter > what objects are in the SceneGraph. > > Here is the code used to get the point from image > space(x, y) to 3D space (Point3d). In order to draw > lines that appear on top of Canvas3D, the points must > be further projected to the near clipping plane to be > able to achieve the objective. > > Is there better or easier way to do this? > > Thanks! > > -- Scott > --------------------------------------------------- > public Point3d getWorldCoordinate(Canvas3D canvas, > int x, int y ) { > > Canvas3D canvas; > Transform3D ipToVworld = new Transform3D(); > Point3d point = new Point3d(); > //get the transformation > canvas.getImagePlateToVworld(ipToVworld); > canvas.getPixelLocationInImagePlate( x, y, > point ); > //Get coordinate in world coordinate system. > ipToVworld.transform(point ); > > return point; > } > ---------------------------------------------------- > > > > __________________________________ > Do you Yahoo!? > Y! Messenger - Communicate in real time. Download now. > http://messenger.yahoo.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". > _______________________________________________________ Yahoo! Acesso Grátis - navegue de graça com conexão de qualidade! Acesse: http://br.acesso.yahoo.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".
