class ColorRGB

The ColorRGB class encapsulates a floating-point RGB color.

class ColorRGB

ColorRGB::Set	Sets all three components of a color.
ColorRGB::GetLuminance	Returns the luminance of an RGB color.

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

ColorRGB();

ColorRGB(float r, float g, float b);

The ColorRGB class encapsulates a color having floating-point red, green, and blue components in the range [0.0, 1.0]. 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 1.0.

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.

float& operator [](machine 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 [](machine 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 s);	Sets all three components to the value s.
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 s);	Multiplies all three components by s.
ColorRGB& operator /=(float s);	Divides all three components by s.

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 s);	Returns the product of the color c and the scalar s.
ColorRGB operator *(float s, const ColorRGB& c);	Returns the product of the color c and the scalar s.
ColorRGB operator /(const ColorRGB& c, float s);	Returns the product of the color c and the inverse of the scalar s.
bool operator ==(const ColorRGB& c1, const ColorRGB& c2);	Returns a boolean value indicating whether the colors c1 and c2 are equal.
bool operator !=(const ColorRGB& c1, const ColorRGB& c2);	Returns a boolean value indicating whether the colors c1 and c2 are not equal.
float Luminance(const ColorRGB& c);	Returns the luminance value of the color c.

ColorRGBA