COLOR.H

/* 
 * (c) Copyright 1993, Silicon Graphics, Inc. 
 *               1993-1995 Microsoft Corporation 
 * 
 * ALL RIGHTS RESERVED 
 * 
 * Please refer to OpenGL/readme.txt for additional information 
 * 
 */ 
 
#ifndef COLOR_H 
#define COLOR_H 
 
class Color { 
 public: 
  inline Color() {}; 
  inline Color(GLfloat r, GLfloat g, GLfloat b, GLfloat a = 1.0); 
   
  inline Color operator=(GLfloat *a); 
  inline Color operator=(GLfloat a); 
  inline Color operator+(Color a); 
  inline Color operator+=(Color a); 
  inline Color operator*(Color a); 
  inline Color operator*(GLfloat a); 
  inline Color operator*=(Color a); 
  inline Color operator*=(GLfloat *a); 
  inline Color operator*=(GLfloat a); 
  
  inline GLfloat& operator[](int index); 
 
  inline Color clamp(); 
   
  inline void glcolor(); 
 
  inline void print(); 
  inline void print(const char *format); 
 
  GLfloat c[4]; 
}; 
 
const Color white(1., 1., 1., 1.), black(0., 0., 0., 1.); 
const Color red(1, 0, 0), green(0, 1, 0), blue(0, 0, 1); 
 
inline Color::Color(GLfloat r, GLfloat g, GLfloat b, GLfloat a) 
{ 
  c[0] = r; 
  c[1] = g; 
  c[2] = b; 
  c[3] = a; 
} 
 
inline Color Color::operator=(GLfloat a) 
{ 
  c[0] = c[1] = c[2] = c[3] = a; 
  return *this; 
} 
 
inline Color Color::operator=(GLfloat *a) 
{ 
  c[0] = a[0]; 
  c[1] = a[1]; 
  c[2] = a[2]; 
  c[3] = a[3]; 
  return *this; 
} 
 
inline Color Color::operator+(Color a)  
{ 
  Color val; 
  val.c[0] = c[0] + a.c[0]; 
  val.c[1] = c[1] + a.c[1]; 
  val.c[2] = c[2] + a.c[2]; 
  val.c[3] = c[3] + a.c[3]; 
  return val; 
} 
 
inline Color Color::operator+=(Color a) 
{ 
  c[0] += a.c[0]; 
  c[1] += a.c[1]; 
  c[2] += a.c[2]; 
  c[3] += a.c[3]; 
  return *this; 
} 
 
inline Color Color::operator*(Color a) 
{ 
  Color val; 
  val.c[0] = c[0] * a.c[0]; 
  val.c[1] = c[1] * a.c[1]; 
  val.c[2] = c[2] * a.c[2]; 
  val.c[3] = c[3] * a.c[3]; 
  return val; 
} 
 
inline Color Color::operator*(GLfloat a) 
{ 
  Color val; 
  val.c[0] = c[0] * a; 
  val.c[1] = c[1] * a; 
  val.c[2] = c[2] * a; 
  val.c[3] = c[3] * a; 
  return val; 
} 
 
inline Color Color::operator*=(Color a) 
{ 
  c[0] *= a.c[0]; 
  c[1] *= a.c[1]; 
  c[2] *= a.c[2]; 
  return *this; 
} 
 
inline Color Color::operator*=(GLfloat *a)  
{ 
  c[0] *= a[0]; 
  c[1] *= a[1]; 
  c[2] *= a[2]; 
  return *this; 
} 
 
inline Color Color::operator*=(GLfloat a) 
{ 
  c[0] *= a; 
  c[1] *= a; 
  c[2] *= a; 
  c[3] *= a; 
   
  return *this; 
} 
 
inline GLfloat& Color::operator[](int index) 
{ 
  return c[index]; 
} 
 
inline Color Color::clamp() 
{ 
  Color val; 
  val.c[0] = c[0] < 0.0 ? 0.0 : (c[0] > 1.0 ? 1.0 : c[0]); 
  val.c[1] = c[1] < 0.0 ? 0.0 : (c[1] > 1.0 ? 1.0 : c[1]); 
  val.c[2] = c[2] < 0.0 ? 0.0 : (c[2] > 1.0 ? 1.0 : c[2]); 
  val.c[3] = c[3] < 0.0 ? 0.0 : (c[3] > 1.0 ? 1.0 : c[3]); 
  return val; 
} 
 
inline void Color::glcolor() 
{ 
  glColor4fv(c); 
} 
 
inline void Color::print() 
{ 
  print("%f %f %f %f\n"); 
} 
 
inline void Color::print(const char *format) 
{ 
  printf(format, c[0], c[1], c[2], c[3]); 
} 
 
#endif