public class CircularCurve extends Curve{

  // The circle in the complex plane
  private double x, y; // coordinates of the center of the circle
  private double r;    // radius of the circle
  
  public CircularCurve (double x, double y, double r) {
    set(x,y,r);
  }
  
  public void set (double x, double y, double r) {
    this.x = x; this.y = y; this.r = r;
  }

  public double x(double t) {
	return  x + r*Math.cos(t);
  }
  
  public double y(double t) {
	  return  y + r*Math.sin(t);
  }
  
}