cal/cal/bezier.cal

{
        Cubic Bezier Interpolating Function

        02Mar90
}
bezier(p1, p2, p3, p4, t) =     p1 * (1+t*(-3+t*(3-t))) +
                                p2 * 3*t*(1+t*(-2+t)) +
                                p3 * 3*t*t*(1-t) +
                                p4 * t*t*t ;
Revision:	1.1
Committed:	Sat Feb 22 02:07:21 2003 UTC (21 years, 2 months ago) by greg
Branch:	MAIN
CVS Tags:	rad3R7P1, rad3R7P2, rad3R5, rad3R6, rad3R8, rad3R6P1
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	Content
1	{
2	Cubic Bezier Interpolating Function
3
4	02Mar90
5	}
6	bezier(p1, p2, p3, p4, t) = p1 * (1+t(-3+t(3-t))) +
7	p2 * 3t(1+t*(-2+t)) +
8	p3 * 3tt*(1-t) +
9	p4 * ttt ;