package rebelsky.newvec;

/**
 * A vector in two space.
 *
 * @author CSC152 2004F
 * @version 1.0
 */
public interface Vec2D
{

// +----------+-----------------------------------------------------
// | Mutators |
// +----------+


// +-----------+----------------------------------------------------
// | Observers |
// +-----------+

	/**
	 * Get the X coordinate of this vector.
	 */
	public double getX();
	
	/**
	 * Get the Y coordinate of this vector.
	 */
	public double getY();
	
	/**
	 * Get the angle of this vector from the origin.
	 */
	public double getAngle();

	/**
	 * Get the radius of this vector.
	 */
	public double getRadius();
	
	/**
	 * Rotate this vector for some amount around the origin.
	 */
	public Vec2D rotate(double angle);

	/**
	 * Stretch this vector by some amount.
	 */
	public Vec2D stretch(double factor);

	/**
	 * Compute the unit vector for this vector (radius 1, same
	 * angle).
	 */
	public Vec2D unitVector();
	
	/**
	 * Convert this vector to a string.
	 */
	public String toString();

} // interface Vec2D