Class RGB¶
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class
colormodel.RGB(r, g, b, a=255)¶ An instance is a RGB color value.
Constructor: creates a new RGB value (r,g,b,a).
param r: initial red value Precondition: int between 0 and 255, inclusive.
param g: initial green value Precondition: int between 0 and 255, inclusive.
param b: initial blue value Precondition: int between 0 and 255, inclusive.
param a: initial alpha value (default 255) Precondition: int between 0 and 255, inclusive.
The alpha channel is 255 by default, unless otherwise specified.
Attributes¶
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RGB.red¶ The red channel.
Invariant: Value must be an int between 0 and 255, inclusive.
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RGB.green¶ The green channel.
Invariant: Value must be an int between 0 and 255, inclusive.
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RGB.blue¶ The blue channel.
Invariant: Value must be an int between 0 and 255, inclusive.
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RGB.alpha¶ The alpha channel.
Used for transparency effects (but not in this course).
Invariant: Value must be an int between 0 and 255, inclusive.