//------------------------------------------
// Filename: Point.C
// Author  : DL Frey
// Date    : 2/21/03
// Section : 1234
// Project : CMSC 202, Spring 03, Project 2
// SSN     : xxx - xx - xxxx
// Description
//    This file implements the Point class
// that encapsulates the x- and y-coordinates
// of a point in the cooridinate plane
//
//    See Point.H for complete method documenation
//
// Basic distance functions are also provide
//-------------------------------------------

#include <cstdlib>        // for abs
#include <cmath>          // for sqrt
#include "Point.H"

using namespace std;

// constructor
Point::Point (int x, int y)
{
   m_XCoordinate = x;
   m_YCoordinate = y;
}

// accessor for X coordinate
int Point::GetX( void ) const
{
   return m_XCoordinate;
}

// mutator for X coordinate
void Point::SetX (int x )
{
   m_XCoordinate = x;
}

// accessor for Y coordinate
int Point::GetY ( void ) const
{
   return m_YCoordinate;
}

// mutator for Y coordinate
void Point::SetY ( int y )
{
   m_YCoordinate = y;
}

// ----------------------------
// Vertical distance
//    returns delta-Y
//-----------------------------
int VerticalDistance (const Point& point1, const Point& point2)
{
   return (abs (point1.GetY() - point2.GetY()));
}

// ----------------------------
// Horizontal distance
//    returns delta-X
//-----------------------------
int HorizontalDistance (const Point& point1, const Point& point2)
{
   return abs(point1.GetX() - point2.GetX());
}

// -------------------------------------
// Distance
//    returns straightline distance from
// point1 to point2 using standard calculation
// derived from Pythagorean theorem
//--------------------------------------
double Distance (const Point& point1, const Point& point2)
{

   int deltaY = VerticalDistance (point1, point2);
   int deltaX = HorizontalDistance (point1, point2);

   return (sqrt(static_cast<double>( deltaY * deltaY + deltaX * deltaX)));
}