[Radiance-general] colorfunc

[Ehsan M.Vazifeh]

Hello,

I am doing rad Tutorial, there we used blue_band as a modifier for
wall_mat. I checked the primitive for blue_band and it looks like below:

void colorfunc blue_band
4 if(Pz-1.2,1,if(Pz-1,0,1)) if(Pz-1.2,1,if(Pz-1,0,1)) 1 .
0
0

my question is how can I find a description for second sentence?

Thanks,

Ehsan
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