source: golgotha/src/maxtool/sdk_inc/color.h @ 80 Tweet

/**********************************************************************
 *<
        FILE: color.h

        DESCRIPTION:

        CREATED BY: Dan Silva

        HISTORY:

 *>     Copyright (c) 1994, All Rights Reserved.
 **********************************************************************/

#ifndef _COLOR_H 

#define _COLOR_H

#include "point3.h"

#define FLto255(x) ((int)((x)*255.0f+.5))       

class Color;

struct RealPixel {
        unsigned char r,g,b;   // mantissas
        unsigned char e;           // exponent
        DllExport operator Color();
        };

DllExport RealPixel MakeRealPixel(float r, float g, float b);
DllExport void ExpandRealPixel(const RealPixel &rp, float &r, float &g, float &b);


class Color {
public:
        float r,g,b;

        // Constructors
        Color()  {}
        Color(float R, float G, float B)  { r = R; g = G; b = B;  }
        Color(double R, double G, double B) { r = (float)R; g = (float)G; b = (float)B; }
        Color(int R, int G, int B) { r = (float)R; g = (float)G; b = (float)B; }
        Color(const Color& a) { r = a.r; g = a.g; b = a.b; } 
        DllExport Color(DWORD rgb);  // from Windows RGB value
        Color(Point3 p) { r = p.x; g = p.y; b = p.z; }
        Color(float af[3]) { r = af[0]; g = af[1]; b = af[2]; }
        Color(RealPixel rp) { ExpandRealPixel(rp,r,g,b); } 
                
        void Black() { r = g = b = 0.0f; }
        void White() { r = g = b = 1.0f; }

        DllExport void ClampMax();  // makes components >= 0.0
        DllExport void ClampMin();  // makes components <= 1.0
    DllExport void ClampMinMax();  // makes components in [0,1]

        // Access operators
        float& operator[](int i) { return (&r)[i]; }     
        const float& operator[](int i) const { return (&r)[i]; }  

        // Conversion function
        operator float*() { return(&r); }

        // Convert to Windows RGB
        operator DWORD() { return RGB(FLto255(r),FLto255(g), FLto255(b)); }

        // Convert to Point3
        operator Point3() { return Point3(r,g,b); }

        // Convert to RealPixel
        DllExport operator RealPixel() { return MakeRealPixel(r,g,b); }

        // Unary operators
        Color operator-() const { return(Color(-r,-g,-b)); } 
        Color operator+() const { return *this; } 

        // Assignment operators
        inline Color& operator-=(const Color&);
    inline Color& operator+=(const Color&);
        inline Color& operator*=(float); 
        inline Color& operator/=(float);
        inline Color& operator*=(const Color&); // element-by-element multiplg.

        // Test for equality
        int operator==(const Color& p) const { return ((p.r==r)&&(p.g==g)&&(p.b==b)); }
        int operator!=(const Color& p) const { return ((p.r!=r)||(p.g!=g)||(p.b!=b)); }

        // Binary operators
        inline Color operator-(const Color&) const;
        inline Color operator+(const Color&) const;
        inline Color operator/(const Color&) const;
    inline Color operator*(const Color&) const;   
        inline Color operator^(const Color&) const;   // CROSS PRODUCT
        };

int DllExport MaxComponent(const Color&);  // index of the component with the maximum abs value
int DllExport MinComponent(const Color&);  // index of the component with the minimum abs value

float DllExport MaxVal(const Color&);  // value of the component with the maximum abs value
float DllExport MinVal(const Color&);  // value of the component with the minimum abs value

// Inlines:

inline float Length(const Color& v) {   
        return (float)sqrt(v.r*v.r+v.g*v.g+v.b*v.b);
        }

inline Color& Color::operator-=(const Color& a) {       
        r -= a.r;       g -= a.g;       b -= a.b;
        return *this;
        }

inline Color& Color::operator+=(const Color& a) {
        r += a.r;       g += a.g;       b += a.b;
        return *this;
        }

inline Color& Color::operator*=(float f) {
        r *= f;   g *= f;       b *= f;
        return *this;
        }

inline Color& Color::operator/=(float f) { 
        r /= f; g /= f; b /= f; 
        return *this; 
        }

inline Color& Color::operator*=(const Color& a) { 
        r *= a.r;       g *= a.g;       b *= a.b;       
        return *this; 
        }

inline Color Color::operator-(const Color& c) const {
        return(Color(r-c.r,g-c.g,b-c.b));
        }

inline Color Color::operator+(const Color& c) const {
        return(Color(r+c.r,g+c.g,b+c.b));
        }

inline Color Color::operator/(const Color& c) const {
        return Color(r/c.r,g/c.g,b/c.b);
        }

inline Color Color::operator*(const Color& c) const {  
        return Color(r*c.r, g*c.g, b*c.b);      
        }

inline Color operator*(float f, const Color& a) {
        return(Color(a.r*f, a.g*f, a.b*f));
        }

inline Color operator*(const Color& a, float f) {
        return(Color(a.r*f, a.g*f, a.b*f));
        }

inline Color operator/(const Color& a, float f) {
        return(Color(a.r/f, a.g/f, a.b/f));
        }

inline Color operator+(const Color& a, float f) {
        return(Color(a.r+f, a.g+f, a.b+f));
        }

inline Color operator+(float f, const Color& a) {
        return(Color(a.r+f, a.g+f, a.b+f));
        }

inline Color operator-(const Color& a, float f) {
        return(Color(a.r-f, a.g-f, a.b-f));
        }

inline Color operator-(float f, const Color& a) {
        return(Color(f-a.r, f-a.g, f-a.b));
        }


#endif