jack@shograf.COM (Jack Ritter) (02/28/91)
In the new Foley & Van Damm et all, on page 731, a cheap approximation to the specular componant R dot V can be calculated via the "halfway vector". This predictably over-estimates when the view vector is in the L R plane. Has anyone looked into improving the estimate when the view vec. is not in the plane? (doubling the exponent n, to compensate for the approximation's spreading-out effect, helps!) Jack Ritter SHO Graphics 1890 N Shoreline Blvd. Mountain View, CA 94043 email: jack@shograf.com Tele: (415) 903-3867