09-30-2015, 12:16 AM
A floating point range of 0.0 to 1.0 is a very common way to handle color channel values rather than an integer range of 0 to 255, or 0 to 100, or 0 to 65535, or ... you get the idea.
http://lmgtfy.com/?q=rgb+0+to+1+scale
http://stackoverflow.com/questions/10848...to-1-scale
http://lmgtfy.com/?q=rgb+0+to+1+scale
http://stackoverflow.com/questions/10848...to-1-scale