Hi, I wonder if someone can guide me with this. I have a ball object which I want to rotate about it's x-axis (simulating back-spin).
I am using the RotPosPathInterpolator which has the correspoding quats to simulate the spin upon its target TransformGroup. The target TG is set with a Transform3D. The rpi transform3D in an empty constructor. The problem I am having is that when the ball moves and spins about the x-axis I need to be perpendicular to the direction it is travelling in. When I rotated the target TG to face the direction it is supposed to travel in, the TG's cordinate system was also rotated so that the bounds of my billiard table (a seperate TG) no longer take effect, as they are now un-aligned. I have tried various rotations of the TG's, including some experiments with AxisAngle4f. If someone can help, it would be very much appreciated. -Greg ps: The following snippets of code show how the ball's TG and the rpi is being instantiated: ball TG: Transform3D sphereT3D = new Transform3D(); sphereT3D.setTranslation( position ); TransformGroup sphereTG = new TransformGroup (sphereT3D ); sphereTG.addChild( createSphere( canvas, imageName ) ); rpi: RotPosPathInterpolator(alpha, target,new Transform3D(), knots, quats, positions ); __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.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".
