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C:/temp/src/j2k/Beta/Math/Vector/Vector3.cpp

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#ifndef __J2K__Vector3_CPP__
#define __J2K__Vector3_CPP__

#include <j2k/Fred/Math/Vector/Vector3.hpp>

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



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



void JVector3::print()
{
  printf("|  %-+7.2f %-+7.2f %-+7.2f|\n\n", v[0], v[1], v[2]);
}



void JVector3::add(JVector3 add)
{
  v[0] = v[0] + add.v[0];
  v[1] = v[1] + add.v[1];
  v[2] = v[2] + add.v[2];
}



void JVector3::subtract(JVector3 sub)
{
  v[0] = v[0] - sub.v[0];
  v[1] = v[1] - sub.v[1];
  v[2] = v[2] - sub.v[2];
}



void JVector3::multiply(double mult)
{
  v[0] = v[0] * mult;
  v[1] = v[1] * mult;
  v[2] = v[2] * mult;
}



void JVector3::divide(double div)
{
  v[0] = v[0] / div;
  v[1] = v[1] / div;
  v[2] = v[2] / div;
}



double JVector3::dot(JVector3 dot)
{
  return v[0] * dot.v[0] + v[1] * dot.v[1] + v[2] * dot.v[2];
}



void JVector3::cross(JVector3 cross)
{
  JVector3 result;
  result.v[0] = v[1] * cross.v[2] - v[2] * cross.v[1];
  result.v[1] = v[2] * cross.v[0] - v[0] * cross.v[2];
  result.v[2] = v[0] * cross.v[1] - v[1] * cross.v[0];
  *this = result;
}



void JVector3::negative()
{
  v[0] = -v[0];
  v[1] = -v[1];
  v[2] = -v[2];
}



double JVector3::length()
{
  return (double) sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
}



void JVector3::unit()
{
  double len = (double) sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
  v[0] = v[0] / len;
  v[1] = v[1] / len;
  v[2] = v[2] / len;
}



double JVector3::comp(JVector3 obj)
{
  return (*this * obj) / !*this;
}



JVector3 JVector3::proj(JVector3 obj)
{
  JVector3 a = *this, b = obj;
  return ((a * b) / (!a * !a)) * a;
}

//=========================================================//

double& JVector3::operator[](int i)
{
  assert( i >= 0 && i < 3);
  return v[i];
}



JVector3 JVector3::operator()(double x, double y, double z)
{
  v[0] = x;
  v[1] = y;
  v[2] = z;
  return *this;
}



JVector3 JVector3::operator+(JVector3 add)
{
  JVector3 result;
  result.v[0] = v[0] + add.v[0];
  result.v[1] = v[1] + add.v[1];
  result.v[2] = v[2] + add.v[2];
  return result;
}



JVector3 JVector3::operator-(JVector3 add)
{
  JVector3 result;
  result.v[0] = v[0] - add.v[0];
  result.v[1] = v[1] - add.v[1];
  result.v[2] = v[2] - add.v[2];
  return result;
}



JVector3 JVector3::operator*(double mult)
{
  JVector3 result;
  result.v[0] = v[0] * mult;
  result.v[1] = v[1] * mult;
  result.v[2] = v[2] * mult;
  return result;
}



JVector3 operator*(double mult, JVector3 vect)
{
  JVector3 result;
  result.v[0] = vect.v[0] * mult;
  result.v[1] = vect.v[1] * mult;
  result.v[2] = vect.v[2] * mult;
  return result;
}



JVector3 JVector3::operator/(double div)
{
  JVector3 result;
  result.v[0] = v[0] / div;
  result.v[1] = v[1] / div;
  result.v[2] = v[2] / div;
  return result;
}



JVector3 operator/(double div, JVector3 vect)
{
  JVector3 result;
  result.v[0] = div / vect.v[0];
  result.v[1] = div / vect.v[1];
  result.v[2] = div / vect.v[2];
  return result;
}



double JVector3::operator*(JVector3 dot)
{
  double result;
  result = v[0] * dot.v[0] + v[1] * dot.v[1] + v[2] * dot.v[2];
  return result;
}



JVector3 JVector3::operator%(JVector3 cross)
{
  JVector3 result;
  result.v[0] = v[1] * cross.v[2] - v[2] * cross.v[1];
  result.v[1] = v[2] * cross.v[0] - v[0] * cross.v[2];
  result.v[2] = v[0] * cross.v[1] - v[1] * cross.v[0];
  return result;
}



JVector3 JVector3::operator-()
{
  JVector3 result;
  result.v[0] = -v[0];
  result.v[1] = -v[1];
  result.v[2] = -v[2];
  return result;
}



double JVector3::operator!()
{
  return (double) sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
}



JVector3 JVector3::operator~()
{
  JVector3 result;
  double len = (double) sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
  result.v[0] = v[0] / len;
  result.v[1] = v[1] / len;
  result.v[2] = v[2] / len;
  return result;
}

#endif

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