// Helene Martin, CSE 142
// Calculates the hypotenuse of a right triangle and displays it on 
// a DrawingPanel and the console.
import java.awt.*;

public class Triangles {
	public static void main(String[] args) {
		DrawingPanel panel = new DrawingPanel(400, 400);
		Graphics g = panel.getGraphics();
		drawRightTriangle(g, 50, 50, 80, 60);
		drawRightTriangle(g, 170, 20, 50, 50);
		drawRightTriangle(g, 10, 200, 150, 133);
		
		printTriangleFact(100, 200);
		printTriangleFact(150, 200);
	}
	
	// Draws a scalable, translatable right triangle with labeled sides
	public static void drawRightTriangle(Graphics g, int x, int y, int width, int height) {
		g.drawLine(x, y, x, y + height);
		g.drawString(height + "", x, y + height / 2);
		
		g.drawLine(x, y + height, x + width, y + height);
		g.drawString("" + width, x + width / 2, y + height);
		
		g.drawLine(x, y, x + width, y + height);
		double hyp = hypotenuse(width, height);
		g.drawString("hyp: " + round(hyp), x + width / 2, y + height / 2);
	}
	
	// Calculates and displays right triangle facts
	public static void printTriangleFact(int width, int height) {
		System.out.println("Right triangle facts:");
		System.out.println("\twidth: " + width);
		System.out.println("\theight: " + height);
		System.out.println("\thypotenuse: " + round(hypotenuse(width, height)));
	}
	
	// Given a decimal value, return it rounded to digits places
	public static double round(double value, int digits) {
		return (int) (value * Math.pow(10, digits)) / (double)Math.pow(10, digits);	
	}
	
	// Given a width and a height, compute the hypotenuse of the triangle.
	public static double hypotenuse(int w, int h) {
		double hyp = Math.sqrt(Math.pow(w, 2) + Math.pow(h, 2));
		return hyp;
		// alternately: return Math.sqrt(Math.pow(w, 2) + Math.pow(h, 2));
	}
}