On Sun, 13 Oct 2002 22:25:55 -0400, Christopher James Huff
<chr### [at] maccom> wrote:

>The new polynomial is "1 - r*r*(3 - 2*r)".

That looks like the -2*x^3+3*x^2 evaluated in [0;1] - isn't that what
has been used for cubic interpolation for ages now? I've seen this
formula in the source code in a few places, I think cubic_wave is
based on it as well.


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg

Post a reply to this message