// ==========================================================================
// $Id: circle.cpp,v 1.1 2011/10/19 03:24:40 jlang Exp $
// CSI2372 example Code for lecture 7
// ==========================================================================
// (C)opyright:
//
//   Jochen Lang
//   EECS, University of Ottawa
//   800 King Edward Ave.
//   Ottawa, On., K1N 6N5
//   Canada. 
//   http://www.eecs.uottawa.ca
// 
// Creator: jlang (Jochen Lang)
// Email:   jlang@eecs.uottawa.ca
// ==========================================================================
// $Log: circle.cpp,v $
// Revision 1.1  2011/10/19 03:24:40  jlang
// Added code for lecture 7
//
//
// ==========================================================================
#include <iostream>

#include "circle.h"
#include "aa_box.h"
#include "vector2d.h"

using std::cout;
using std::endl;

Circle::Circle( Point2D _center, double _radius ) :
  d_center(_center), d_radius(_radius)
{}

bool Circle::enclose( Point2D _extrema[], int _size ) {
  AABox tmp;
  if ( tmp.enclose( _extrema, _size )) {
    Vector2D upperRight(tmp.getUpperRight());
    Vector2D lowerLeft(tmp.getLowerLeft());
    d_center = upperRight.subtract(lowerLeft).scale(0.5).add(lowerLeft);
    d_radius = upperRight.subtract(Vector2D(d_center)).getLength(); 
    return true;
  } 
  return false;
}


bool Circle::isInside( const Point2D& _pt ) const {
  if (Vector2D(_pt).subtract(d_center).getLength()-d_radius <= 0.0 )    
    return true;
  else
    return false;
}


void Circle::print() const {
  cout << "Circle at: ";
  d_center.print(); 
  cout << " with radius  " << d_radius;
  return;
}