class ColorRGB

Defined in: C4ColorRGBA.h

The ColoRGB class encapsulates an RGB color.

Definition

class ColorRGB

Member Functions

ColorRGB::Set Sets all three components of a color.

Data Members

`float red;`	The red component.
`float green;`	The green component.
`float blue;`	The blue component.

Constructor

ColorRGB();

ColorRGB(float r, float g, float b);

Description

The ColorRGB class encapsulates a color having floating-point red, green, and blue components. An additional alpha component is provided by the ColorRGBA class. When a ColorRGB object is converted to a ColorRGBA object, the alpha component is assumed to be 1.

The default constructor leaves the components of the color undefined. If the values r, g, and b are supplied, then they are assigned to the red, green, and blue components of the color, respectively.

Overloaded Operators

`float& operator [](long k);`	Returns a reference to the `k`-th component of a color. The value of `k` must be 0, 1, or 2.
`const float& operator [](long k) const;`	Returns a constant reference to the `k`-th component of a color. The value of `k` must be 0, 1, or 2.
`ColorRGB& operator =(float f);`	Sets all three components to the value `f`.
`ColorRGB& operator +=(const ColorRGB& c);`	Adds the color `c`.
`ColorRGB& operator -=(const ColorRGB& c);`	Subtracts the color `c`.
`ColorRGB& operator *=(const ColorRGB& c);`	Multiplies by the color `c`.
`ColorRGB& operator *=(float t);`	Multiplies all three components by `t`.
`ColorRGB& operator /=(float t);`	Divides all three components by `t`.

Nonmember Operations

`ColorRGB operator -(const ColorRGB& c);`	Returns the negation of the color `c`.
`ColorRGB operator +(const ColorRGB& c1, const ColorRGB& c2);`	Returns the sum of the colors `c1` and `c2`.
`ColorRGB operator -(const ColorRGB& c1, const ColorRGB& c2);`	Returns the difference of the colors `c1` and `c2`.
`ColorRGB operator *(const ColorRGB& c1, const ColorRGB& c2);`	Returns the product of the colors `c1` and `c2`.
`ColorRGB operator *(const ColorRGB& c, float t);`	Returns the product of the color `c` and the scalar `t`.
`ColorRGB operator *(float t, const ColorRGB& c);`	Returns the product of the color `c` and the scalar `t`.
`ColorRGB operator /(const ColorRGB& c, float t);`	Returns the product of the color `c` and the inverse of the scalar `t`.
`bool operator ==(const ColorRGB& c1, const ColorRGB& c2);`	Returns a boolean value indicating the equality of the colors `c1` and `c2`.
`bool operator !=(const ColorRGB& c1, const ColorRGB& c2);`	Returns a boolean value indicating the inequality of the colors `c1` and `c2`.