You've got a line there that says brightnessFactor = a whole bunch of integer math. Integer math is only going to give inter gets, it will never give you 0.82 or any other decimal number.

Make those constants floats like 1.0 and 2.0 instead of just 1 and 2 and see what happens.

Delta_G:
You've got a line there that says brightnessFactor = a whole bunch of integer math. Integer math is only going to give inter gets, it will never give you 0.82 or any other decimal number.

Make those constants floats like 1.0 and 2.0 instead of just 1 and 2 and see what happens.