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/******************************************************************/
/* This file is part of the homework assignments for CSCI-427/527 */
/* at The College of William & Mary and authored by Pieter Peers. */
/* No part of this file, whether altered or in original form, can */
/* be distributed or used outside the context of CSCI-427/527 */
/* without consent of either the College of William & Mary or */
/* Pieter Peers. */
/******************************************************************/
#include <cassert>
#include <algorithm>
#include "vec2d.h"
//////////////////
// Constructors //
//////////////////
vec2d::vec2d(vec2d::const_reference value)
{
x = y = value;
}
vec2d::vec2d(vec2d::const_reference x, vec2d::const_reference y)
{
this->x = x;
this->y = y;
}
vec2d::vec2d(const vec2d& v)
{
x = v.x;
y = v.y;
}
////////////////
// Inspectors //
////////////////
vec2d::const_reference vec2d::operator[](size_t index) const
{
assert(index < size());
return data[index];
}
vec2d::reference vec2d::operator[](size_t index)
{
assert(index < size());
return data[index];
}
vec2d::iterator vec2d::begin(void)
{
return data;
}
vec2d::const_iterator vec2d::begin(void) const
{
return data;
}
vec2d::iterator vec2d::end(void)
{
return begin() + size();
}
vec2d::const_iterator vec2d::end(void) const
{
return begin() + size();
}
///////////////
// Operators //
///////////////
vec2d& vec2d::operator=(const vec2d& v)
{
_assign(v);
return *this;
}
bool vec2d::operator==(const vec2d& v) const
{
return (x == v.x) && (y == v.y);
}
bool vec2d::operator!=(const vec2d& v) const
{
return (x != v.x) || (y != v.y);
}
vec2d vec2d::operator-(void) const
{
return vec2d(-x, -y);
}
vec2d vec2d::operator+(const vec2d& v) const
{
return vec2d(x + v.x, y + v.y);
}
vec2d vec2d::operator-(const vec2d& v) const
{
return vec2d(x - v.x, y - v.y);
}
vec2d vec2d::operator*(const vec2d& v) const
{
return vec2d(x * v.x, y * v.y);
}
vec2d vec2d::operator*(vec2d::const_reference scale) const
{
return vec2d(x * scale, y * scale);
}
vec2d vec2d::operator/(const vec2d& v) const
{
return vec2d(x / v.x, y / v.y);
}
vec2d vec2d::operator/(vec2d::const_reference scale) const
{
return vec2d(x / scale, y / scale);
}
vec2d& vec2d::operator+=(const vec2d& v)
{
x += v.x;
y += v.y;
return *this;
}
vec2d& vec2d::operator-=(const vec2d& v)
{
x -= v.x;
y -= v.y;
return *this;
}
vec2d& vec2d::operator*=(const vec2d& v)
{
x *= v.x;
y *= v.y;
return *this;
}
vec2d& vec2d::operator*=(vec2d::const_reference scale)
{
x *= scale;
y *= scale;
return *this;
}
vec2d& vec2d::operator/=(const vec2d& v)
{
x /= v.x;
y /= v.y;
return *this;
}
vec2d& vec2d::operator/=(vec2d::const_reference scale)
{
x /= scale;
y /= scale;
return *this;
}
///////////////
// Modifiers //
///////////////
vec2d::value_type vec2d::dot(const vec2d& v) const
{
return (x*v.x + y*v.y);
}
vec2d::value_type vec2d::squared_length(void) const
{
return dot(*this);
}
vec2d::value_type vec2d::length(void) const
{
return sqrt(squared_length());
}
vec2d::value_type vec2d::squared_distance(const vec2d& v) const
{
return (*this - v).squared_length();
}
vec2d::value_type vec2d::distance(const vec2d& v) const
{
return sqrt(squared_distance(v));
}
///////////////
// Modifiers //
///////////////
vec2d& vec2d::abs(void)
{
std::for_each(begin(), end(), [](reference val)
{
if(val < 0) val = -val;
});
return *this;
}
vec2d& vec2d::normalize(void)
{
*this /= length();
return *this;
}
/////////////////////
// Private Methods //
/////////////////////
void vec2d::_assign(const vec2d& v)
{
x = v.x;
y = v.y;
}
void vec2d::_swap(vec2d& v)
{
std::swap(x, v.x);
std::swap(y, v.y);
}
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