point.h

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/**
 *\file         point.h
 *
 *\brief
 *              
 *
 *\author       Xianming Chen\n
 *              Computer Science Department\n
 *              University of Utah
 *
 *\date         14 Aug 2006\n
 *              Copyright (c) 2006, University of Utah
 */


#ifndef _POINT_H
#define _POINT_H


#include <cassert>
#include <iosfwd>

namespace euler
{
  const float pi = 3.14159265;
  
  class point_t
  {
      float p[4];
  public:
      float& operator[](int i)                                          { return p[i]; }
      float const& operator[](int i) const                              { return p[i]; }
      point_t(float x=.0f, float y=.0f, float z=.0f, float w=1.0f)      { p[0] = x, p[1] = y, p[2] = z, p[3] = w; }

      point_t operator+(point_t const& r) const                         { assert(p[3] == r[3]); point_t ret(*this);  return ret += r; }
      point_t& operator+=(point_t const& r)                             { assert(p[3] == r[3]); for(int i=0; i<3; i++) p[i] += r[i]; return *this; }
  };

  std::ostream& operator<<(std::ostream& os, point_t const& p);
  
  typedef point_t vector_t;

}//end namespace euler


#endif

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