Can the ranges set in colorMode have minimum values?

benw999999999

colorMode() can set maximum values for rgb hsb gray alpha parameters, creating ranges between 0 and the given argument between 1 and 255. Can colorMode() also set minimum values for these parameters?

For example: how could I add a minimum value of 50 to the grayscale for this code? colorMode(RGB, 100)

jeremydouglass

@benw999999999 --

No, colorMode doesn't take a min argument:

• https://processing.org/reference/colorMode_.html
• http://processing.github.io/processing-javadocs/core/processing/core/PGraphics.html#colorMode-int-float-float-float-float-

What are you trying to express with RGB min 50, max 100? Would that mean that background(50) would draw black, and background(100) would draw what? Or are you trying to have colors never go below a certain gray value...?

I believe (?) that color math throughout Processing is zero-range based. Depending on what you are trying to do, might be easier to map your color inputs -- or normalize the into a 0-1.0 colorspace:

noStroke();
// 1. map 50-100 to default color range 0-255 
color c = color(map(75, 50, 100, 0, 255));
fill(c);
rect(0,0,width/2,height);
// 2. normalize 50-100 to the color range 0-1.0
colorMode(RGB, 1.0);
c = color(norm(95, 50, 100));
fill(c);
rect(width/2,0,width/2,height);