color.hpp

来自「The goal of this project is to explore t」· HPP 代码 · 共 73 行

#if !defined(BRL_COLOR_HPP)
#define BRL_COLOR_HPP

/*+----------------------------------------------------------------------------
    Ben Landon
    CSCI E-235

    Color 

    This is a simple class that hangs onto RGBA values.
    
    There are also a few named colors (e.g. "blue") that
    are generally useful.  
*/

class Color 
{
private:
    float m_red;
    float m_green;
    float m_blue;
    float m_alpha;
    
public:
    Color (void);
    Color (const Color& color);
    Color (float r, float g, float b);
    Color (float r, float g, float b, float a);
    ~Color ();
    
    const Color& operator= (const Color& color);

    float red (void) const { return m_red; }
    float green (void) const {return m_green; }
    float blue (void) const {return m_blue; }
    float alpha (void) const {return m_alpha; }
    
    float r (void) const {return this->red(); }
    float g (void) const {return this->green(); }
    float b (void) const {return this->blue(); }
    float a (void) const {return this->alpha(); }

    void set (float r, float g, float b, float a = 1.0f);
    void set_from_array (const float* array, int size);

    // Return the sum of the red green and blue channels
    // multiplied by opacity.  This gives the brightness
    // of a color.
    float sum (void) { return m_alpha * (m_red + m_green + m_blue); }

    // Set as the current color in OpenGL.
    void make_current (void) const;
    
    // Return the color data in a float array.
    void to_float_array (float *array, int size) const;

    static void set_current (const Color& color);
    
};


extern const Color cyan; 
extern const Color yellow;
extern const Color blue;
extern const Color red;
extern const Color magenta;
extern const Color green;
extern const Color black;
extern const Color white;
extern const Color gray;

#endif