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Comparing ray/src/rt/rayinit.cal (file contents):
Revision 2.14 by greg, Tue Mar 11 19:29:05 2003 UTC vs.
Revision 2.15 by greg, Mon Mar 25 16:10:00 2013 UTC

# Line 21 | Line 21
21  
22          Lu, Lv                          - local (u,v) coordinates
23  
24 <        For brdf functions, the following are also available:
24 >        For *func & *data materials, the following are also available:
25  
26          NxP, NyP, NzP                   - perturbed surface normal
27          RdotP                           - perturbed ray dot product
# Line 41 | Line 41
41  
42          sin(x), cos(x), tan(x),
43          asin(x), acos(x),
44 <        atan(x), atan2(y,x)             - standard trig functions
44 >        atan(x), atan2(y,x)             - standard trig functions (radians)
45  
46          floor(x), ceil(x)               - g.l.b. & l.u.b.
47  

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