package part2;

import java.awt.Color;
import java.awt.Point;

public class Triangle extends Shape {
   private Point a, b, c;
  
   /**
    * Create a triangle with the specified vertices and color.
    * @param a The first vertex.
    * @param b The second vertex.
    * @param c The third vertex.
    * @param color The color of the triangle.
    */
   public Triangle(Point a, Point b, Point c, Color color) {
      super(color);
      this.a = a;
      this.b = b;
      this.c = c;
   }
   
   /**
    * Compute and return the area of this triangle.
    */
   @Override
   public double getArea() {
      return 0.5 * Math.abs(
         this.a.x * (this.b.y - this.c.y) + 
         this.b.x * (this.c.y - this.a.y) +
         this.c.x * (this.a.y - this.b.y)
      );
   }

   /**
    * Compute and return the perimeter of this triangle.
    */
   @Override
   public double getPerimeter() {
      return a.distance(b) + b.distance(c) + c.distance(a);
   }

   /**
    * Move the triangle by the specified amount.
    * @param p The amount to move the triangle.
    */
   @Override
   public void translate(Point p) { 
      this.a.translate(p.x, p.y); 
      this.b.translate(p.x, p.y); 
      this.c.translate(p.x, p.y); 
   }

   public Point getVertexA() {
      return this.a;
   }

   public Point getVertexB() {
      return this.b;
   }

   public Point getVertexC() {
      return this.c;
   }
}