/*
 * 	Problem 2, Part 2, Lab 7, Wednesday, 24-09-2008

	Use this modified Triangle class to develop a program which will take as input the coor-
	dinates of the three points of the triangle A, and a point r. (Total eight command line
	arguments). The program should prints the the following output with suitable messages.
	• Area of triangle A.
	• Perimeter of triangle A.
	• Whether point r lies within triangle A or not.
	• Whether line segment passing through (5, 0) and (0, 5) is parallel to any of the sides
		of triangle A or not.
	• Whether line segment passing through points (0, 0) and (5, 5) intersects any of the
		sides of triangle A or not.	
 */


package Geometry;

class TestGeometry {
	public static void main(String[] args) {
		if(args.length != 8) {
			System.out.println("Invalid No of Command line parameters");
			System.out.println("Usage :: java ./TestTriangle <x1> <y1> <x2> <y2> <x3> <y3> <x4> <y4>");
			return;
		}
		double x1,y1,x2,y2,x3,y3,x4,y4;
		try {
			x1 = Double.parseDouble(args[0]);
			y1 = Double.parseDouble(args[1]);
			x2 = Double.parseDouble(args[2]);
			y2 = Double.parseDouble(args[3]);
			x3 = Double.parseDouble(args[4]);
			y3 = Double.parseDouble(args[5]);
			x4 = Double.parseDouble(args[6]);
			y4 = Double.parseDouble(args[7]);
		}
		catch (NumberFormatException ex) {
			// TODO: handle exception
			System.out.println("NumberFormatException :: " + ex.getMessage());
			return;
		}
		//Creating a Triangle object from the first three sets of coordinates from command line
		Triangle t1 = new Triangle(x1,y1,x2,y2,x3,y3);
		//Creating a point object from the last coordinate set from command line
		Point r = new Point(x4,y4);
		
		System.out.println("Area of triangle :: " + t1.Area());
		System.out.println("Perimeter of triangle :: " + t1.Perimeter());
		
		/*
		 * The return value of isInside method in Triangle class is boolean. 
		 * So it can be directly used to print whether a point lies in a triangle or not
		 */
		System.out.println("Point r lies inside triangle ? :: " + t1.isInside(r));
		
		//Creating two line segments as per given co-ordinates in the question
		LineSegment l1 = new LineSegment(5,0,0,5);
		LineSegment l2 = new LineSegment(0,0,5,5);
		
		//Creating three line segments corrosponding to the three sides of the triangle 
		LineSegment tripq = new LineSegment(t1.getP(),t1.getQ());
		LineSegment triqr = new LineSegment(t1.getQ(),t1.getR());
		LineSegment trirp = new LineSegment(t1.getR(),t1.getP());
		
		/*
		 * The value of (l1.isParallel(tripq) || l1.isParallel(triqr) || l1.isParallel(trirp)) is true if 
		 * Line segment passing through (5,0) and (0,5) parallel to any side of the triangle else the value of the expression is false
		 */
		System.out.println("Line segment passing through (5,0) and (0,5) parallel to any side of the triangle ? :: " + (l1.isParallel(tripq) || l1.isParallel(triqr) || l1.isParallel(trirp)));
		
		/*
		 * The value of (l2.intersects(tripq) || l2.intersects(triqr) || l2.intersects(trirp)) is true if
		 * Line segment passing through (0,0) and (5,5) intersects any side of the triangle  else the value of the expression is false
		 */
		System.out.println("Line segment passing through (0,0) and (5,5) intersects any side of the triangle ? :: " + (l2.intersects(tripq) || l2.intersects(triqr) || l2.intersects(trirp)));
		
	}

}