package proj4;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Polygon;

public class ColoredEquilateralTriangle extends ColoredShape {
   
   private int side;
   private Polygon triangle;
   
   public ColoredEquilateralTriangle(int x, int y, Color c, int side) {
      super(x, y, c);
      this.side = side;
      triangle = getPolygon();
   }
   
   public void draw(Graphics g) {
      if (isFilled())
         g.fillPolygon(triangle);
      else
         g.drawPolygon(triangle);
   }
   
   private  Polygon getPolygon() {
      int x = getX();
      int y = getY();
      int height = (int)(side * Math.sqrt(3)/2.0 + 0.5);
      int[] xs = new int[3];
      int[] ys = new int[3];
      xs[0] = x;
      ys[0] = y + height;
      xs[1] = x + side/2;
      ys[1] = y;
      xs[2] = x + side;
      ys[2] = y + height;
      return new Polygon(xs, ys, 3);
   }
   
   public boolean inside(int x, int y) {
      return triangle.contains(x,y);
   }

}