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C:/temp/src/j2k/Beta/Math/Vector/Vector2.cpp

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#ifndef __J2K__Vector2_CPP__
#define __J2K__Vector2_CPP__

#include <j2k/Fred/Games/Vector2.hpp>

inline JVector2::JVector2(const JVector2& obj)
{
   v[0] = obj.v[0];
   v[1] = obj.v[1];
}



inline JVector2::JVector2(const JVector3& obj)
{
   v[0] = obj.v[0] / obj.v[2];
   v[1] = obj.v[1] / obj.v[2];
}



void JVector2::printSelf()
{
  printf("| %-+7.2f %-+7.2f|\n\n", v[0], v[1]);
}



JVector2 JVector2::rotate(double rad)
{
        double s = (double)sin(rad), c = (double)cos(rad);
        JVector2 ret;
  
   ret.v[0] = c * v[0] - s * v[1];
   ret.v[1] = s * v[0] + c * v[1];

   return ret;
}



void JVector2::add(JVector2 add)
{
  v[0] = v[0] + add.v[0];
  v[1] = v[1] + add.v[1];
}



void JVector2::subtract(JVector2 sub)
{
  v[0] = v[0] - sub.v[0];
  v[1] = v[1] - sub.v[1];
}



void JVector2::multiply(double mult)
{
  v[0] = v[0] * mult;
  v[1] = v[1] * mult;
}



void JVector2::divide(double div)
{
  v[0] = v[0] / div;
  v[1] = v[1] / div;
}



double JVector2::dot(JVector2 dot)
{
  return v[0] * dot.v[0] + v[1] * dot.v[1];
}



void JVector2::negative()
{
  v[0] = -v[0];
  v[1] = -v[1];
}



double JVector2::length()
{
  return (double) sqrt(v[0] * v[0] + v[1] * v[1]);
}



void JVector2::unit()
{
  double len = (double) sqrt(v[0] * v[0] + v[1] * v[1]);
  v[0] = v[0] / len;
  v[1] = v[1] / len;
}



double JVector2::comp(JVector2 obj)
{
  return (*this * obj) / !*this;
}



JVector2 JVector2::proj(JVector2 obj)
{
  JVector2 a = *this, b = obj;
  return ((a * b) / (!a * !a)) * a;
}

double JVector2::operator[](int i)
{
  assert( i >= 0 && i < 2);
  return v[i];
}



JVector2 JVector2::operator()(double x, double y)
{
  v[0] = x;
  v[1] = y;
  return *this;
}



JVector2 JVector2::operator+(JVector2 add)
{
  JVector2 result;
  result.v[0] = v[0] + add.v[0];
  result.v[1] = v[1] + add.v[1];
  return result;
}



JVector2 JVector2::operator-(JVector2 add)
{
  JVector2 result;
  result.v[0] = v[0] - add.v[0];
  result.v[1] = v[1] - add.v[1];
  return result;
}



JVector2 JVector2::operator*(double mult)
{
  JVector2 result;
  result.v[0] = v[0] * mult;
  result.v[1] = v[1] * mult;
  return result;
}



JVector2 operator*(double mult, JVector2 vect)
{
  JVector2 result;
  result.v[0] = vect.v[0] * mult;
  result.v[1] = vect.v[1] * mult;
  return result;
}



JVector2 JVector2::operator/(double div)
{
  JVector2 result;
  result.v[0] = v[0] / div;
  result.v[1] = v[1] / div;
  return result;
}



JVector2 operator/(double div, JVector2 vect)
{
  JVector2 result;
  result.v[0] = div / vect.v[0];
  result.v[1] = div / vect.v[1];
  return result;
}



double JVector2::operator*(JVector2 dot)
{
  double result;
  result = v[0] * dot.v[0] + v[1] * dot.v[1];
  return result;
}



JVector2 JVector2::operator-()
{
  JVector2 result;
  result.v[0] = -v[0];
  result.v[1] = -v[1];
  return result;
}



double JVector2::operator!()
{
  return (double) sqrt(v[0] * v[0] + v[1] * v[1]);
}



JVector2 JVector2::operator~()
{
  JVector2 result;
  double len = (double) sqrt(v[0] * v[0] + v[1] * v[1]);
  result.v[0] = v[0] / len;
  result.v[1] = v[1] / len;
  return result;
}

#endif

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