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root/radiance/ray/src/rt/rayinit.cal
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Comparing ray/src/rt/rayinit.cal (file contents):
Revision 2.8 by greg, Thu Dec 9 16:56:28 1993 UTC vs.
Revision 2.10 by greg, Thu Feb 29 11:13:34 1996 UTC

# Line 24 | Line 24
24          RdotP                           - perturbed ray dot product
25          CrP, CgP, CbP                   - perturbed material color
26  
27 +        For prism1 and prism2 types, the following are available:
28 +
29 +        DxA, DyA, DzA                   - direction to target light source
30 +
31          Library functions:
32  
33          if(a, b, c)                     - if a positive, return b, else c
# Line 97 | Line 101 | noneg(v) = if(v,v,0);
101   red(r,g,b) = if(r,r,0);
102   green(r,g,b) = if(g,g,0);
103   blue(r,g,b) = if(b,b,0);
104 < grey(r,g,b) = noneg(.263*r + .655*g + .082*b);
104 > grey(r,g,b) = noneg(.265074126*r + .670114631*g + .064811243*b);
105   clip_r(r,g,b) = bound(0,r,1);
106   clip_g(r,g,b) = bound(0,g,1);
107   clip_b(r,g,b) = bound(0,b,1);

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