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Mastering openFrameworks: Creative Coding Demystified by Denis Perevalov

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Colors

Up until now we have worked with colors using the functions ofSetColor( r, g, b ) and ofBackground( r, g, b ). By calling these functions, we specify the color of the current drawing and background as r, g, and b values, corresponding to red, green, and blue components, where r, g and b are integer values lying in the range 0 to 255.

Tip

When you need to specify gray colors, you can use overloaded versions of these functions with just one argument: ofSetColor( gray ) and ofBackground( gray ), where gray is in the range 0 to 255.

These functions are simple, but not enough. Sometimes, you need to pass the color as a single parameter in a function, and also do color modifications like changing the brightness. To solve this problem, openFrameworks ...

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