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Mastering openFrameworks: Creative Coding Demystified
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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.
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 has the class ofColor. It lets us operate with colors as we do with single entities and modify these.
ofColor
is a class representing a color. It has four float fields: r, g, b, and a. Here r, g, and b are red, green, and blue components of a...
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