Revision: | 1.1 |
Committed: | Sat Feb 22 02:07:21 2003 UTC (21 years, 1 month ago) by greg |
Branch: | MAIN |
CVS Tags: | rad3R7P2, rad3R7P1, rad4R0, rad3R5, rad3R6, rad3R6P1, rad3R8, rad3R9 |
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 | frac(x)=x-floor(x); |
2 | |
3 | hermite(p0,p1,r0,r1,t) = p0 * ((2*t-3)*t*t+1) + |
4 | p1 * (-2*t+3)*t*t + |
5 | r0 * (((t-2)*t+1)*t) + |
6 | r1 * ((t-1)*t*t); |
7 | |
8 | rand2a(x) = 1-2*rand(.69692*x); |
9 | rand2b(x) = 1-2*rand(.05393*x); |
10 | |
11 | noise(x,y) = noise_1(floor(x),frac(x),ceil(x)); |
12 | |
13 | noise_1(xl,xd,xu) = hermite( |
14 | rand2a(xl), |
15 | rand2a(xu), |
16 | rand2b(xl), |
17 | rand2b(xu), |
18 | xd); |