Hi All, I have a question for the Java3D folks. In my app, I am using the method in Shape3D:
intersect(SceneGraphPath path, PickRay pickRay, double[] dist); Now, I'd really like to know the normal at the intersection point, and I'm wondering whether it would (theoretically) be possible for a *similarly performant* method to be added to Shape3D thus: intersect(SceneGraphPath path, PickRay pickRay, double[] dist, Vector3f[] normal); that returned the normal of the intersection point ? Now, yes, I know that I can achieve this with PickTool / PickResult / PickIntersection.getPointNormal() in the utilities classes, but the implementation essentially does the pick all over again (but slower), and performance is critical to me. (And anyhow, I prefer to shun the utility classes). I suspect that there is some underlying reason that the method I'm suggesting couldn't be implemented efficiently, and I'd really like to know what the situation is. A (naive, no doubt) mathematical approach would suggest that the existing intersect method needs to solve the plane equation 'r.n=c' and the line equation 'r = a + lamba * b' for r, which would suggest n should be readily available. Thanks! Rob -- Rob Nugent Sun Microsystems, Southampton, UK [EMAIL PROTECTED] Tel: +44 (0) 1489 585503 Fax: +44 (0) 1489 881363 =========================================================================== 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".
