I have the following three functions:

#declare correctRGB_R = function(R,G,B) {min(max(R,0),1)}
#declare correctRGB_G = function(R,G,B) {min(max(G,0),1)}
#declare correctRGB_B = function(R,G,B) {min(max(B,0),1)}

They each process input and output one component of an R,G,B color vector.

However, instead of the above, I want the entire vector discarded if 
*any* of R, G or B is less than zero or greater than one.

I'm not sure how to form the select statement. What is the best way to 
do this?

Mike

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