/*
   Lab : Lab7
   Day : Tuesday  [ 23 Sept 08 ]

   Problem Number: 01
   Problem Title : implementing a Axis parallel rect class 
   
   Theory :
       Please go through the code
	
        
 */

	// This class had been discussed in class on 19sept (lecture 21)
	class point
	{ 
		double x;
  		double y;

  		public void setX(double x_value) 
		{
			x = x_value;
		}

 	 	public void setY(double y_value) 
		{ 
			y = y_value;
		}

  		public double distance_from_origin()
  		{
    			return Math.sqrt(x*x+y*y);
  		}
		
		public void show_point()
  		{
    			System.out.print(" (" + x + "," + y + ")" );
  		}
	};

	// Implimentation of class Axis_parallel_rect
	class axis_parallel_rect
	{ 
		point lower_left_corner;
  		point upper_right_corner;

		// constructor with two point as parameter
  		public axis_parallel_rect(point L, point U)
		{
			lower_left_corner = new point();
  			upper_right_corner = new point();

			lower_left_corner.x = L.x ;
			lower_left_corner.y = L.y ;

			upper_right_corner.x = U.x ;
			upper_right_corner.y = U.y ;
		}

		// constructor with one point and two distance parameter
		public axis_parallel_rect(point L, double x_length, double y_length)
		{
			lower_left_corner = new point();
  			upper_right_corner = new point();

			lower_left_corner.x = L.x ;
			lower_left_corner.y = L.y ;

			upper_right_corner.x = L.x + x_length;
			upper_right_corner.y = L.y + y_length;
		}

		// constructor without parameter
		public axis_parallel_rect()
		{
			lower_left_corner = new point();
  			upper_right_corner = new point();

			lower_left_corner.x  = 0;
			lower_left_corner.y  = 0;
			upper_right_corner.x = 0;
			upper_right_corner.y = 0;
		}

		public double area()
		{
			return (upper_right_corner.x - lower_left_corner.x) * (upper_right_corner.y - lower_left_corner.y);
		}

 	 	public double perimeter()
		{
			return 2*((upper_right_corner.x - lower_left_corner.x) + (upper_right_corner.y - lower_left_corner.y));
		}

 	 	public point center()
		{
			point centre = new point();
			centre.x = (upper_right_corner.x + lower_left_corner.x) / 2 ;
			centre.y = (upper_right_corner.y + lower_left_corner.y) / 2 ;
			return  centre;
		}

		public boolean is_inside(point P)
		{
			if ( 
				(P.x >= this.lower_left_corner.x)   &&  (P.x <= this.upper_right_corner.x) &&
			     	(P.y >= this.lower_left_corner.y)   &&  (P.y <= this.upper_right_corner.y) 
                           ) 
			{
				return true;
			}
			return false;
		}

	};

	
class sol_lab7_prob01{

   	public static void main(String args[])
	{		
		point point1 = new point();
		point point2 = new point();

		point1.setX(10);  
		point1.setY(10);
		System.out.print("\n\npoint1 = "); point1.show_point();
		System.out.print("\nDistance of point1 from Origine = " + point1.distance_from_origin() );

		point2.setX(15);  
		point2.setY(15);
		System.out.print("\n\npoint1 = "); point2.show_point();
		System.out.print("\nDistance of point1 from Origine = " + point2.distance_from_origin() );

		axis_parallel_rect rect1 = new axis_parallel_rect(point1,point2);
		axis_parallel_rect rect2 = new axis_parallel_rect(point1,20,20);
		axis_parallel_rect rect3 = new axis_parallel_rect();
 		
		System.out.print("\n\nrect1 = " ); rect1.lower_left_corner.show_point(); rect1.upper_right_corner.show_point();
		System.out.print("\nArea=" + rect1.area() +" Perimeter="+rect1.perimeter() + " Centre=");  rect1.center().show_point();

		System.out.print("\n\nrect2=" ); rect2.lower_left_corner.show_point(); rect2.upper_right_corner.show_point();
		System.out.print("\nArea=" + rect2.area() +" Perimeter="+rect2.perimeter() + " Centre=");  rect2.center().show_point();

		System.out.print("\n\nrect3 = " ); rect3.lower_left_corner.show_point(); rect3.upper_right_corner.show_point();
		System.out.print("\nArea=" + rect3.area() +"  Perimeter="+rect3.perimeter() + " Centre=");  rect3.center().show_point();		

		System.out.print("\n\n rect3.is_inside(point1) = " + rect3.is_inside(point1) );
     		System.out.println("\n rect2.is_inside(point1) = " + rect2.is_inside(point1) );
 	}	
}