Vector2.java

package com.minestellar.utils.vector;

/**
 * Vector2 Class is used for defining objects in a 2D space.
 *
 * @author Calclavia
 */

public class Vector2 implements Cloneable {
	public double x;
	public double y;

	public Vector2() {
		this(0, 0);
	}

	public Vector2(double x, double y) {
		this.x = x;
		this.y = y;
	}

	/**
	 * Returns the integer floor value.
	 *
	 * @return
	 */
	public int intX() {
		return (int) Math.floor(this.x);
	}

	public int intY() {
		return (int) Math.floor(this.y);
	}

	/**
	 * Makes a new copy of this Vector. Prevents variable referencing problems.
	 */
	@Override
	public final Vector2 clone() {
		return new Vector2(this.x, this.y);
	}

	public static double distance(Vector2 point1, Vector2 point2) {
		double xDifference = point1.x - point2.x;
		double yDiference = point1.y - point2.y;
		return Math.sqrt(xDifference * xDifference + yDiference * yDiference);
	}

	public static double slope(Vector2 point1, Vector2 point2) {
		double xDifference = point1.x - point2.x;
		double yDiference = point1.y - point2.y;
		return yDiference / xDifference;
	}

	public double distanceTo(Vector2 target) {
		double xDifference = this.x - target.x;
		double yDifference = this.y - target.y;
		return Math.sqrt(xDifference * xDifference + yDifference * yDifference);
	}

	public Vector2 add(Vector2 par1) {
		this.x += par1.x;
		this.y += par1.y;
		return this;
	}

	public Vector2 add(double par1) {
		this.x += par1;
		this.y += par1;
		return this;
	}

	public Vector2 invert() {
		this.multiply(-1);
		return this;
	}

	public Vector2 multiply(double amount) {
		this.x *= amount;
		this.y *= amount;
		return this;
	}

	public Vector2 round() {
		return new Vector2(Math.round(this.x), Math.round(this.y));
	}

	public Vector2 ceil() {
		return new Vector2(Math.ceil(this.x), Math.ceil(this.y));
	}

	public Vector2 floor() {
		return new Vector2(Math.floor(this.x), Math.floor(this.y));
	}

	@Override
	public int hashCode() {
		return ("X:" + this.x + "Y:" + this.y).hashCode();
	}

	@Override
	public boolean equals(Object o) {
		if (o instanceof Vector2) {
			Vector2 vector = (Vector2) o;
			return this.x == vector.x && this.y == vector.y;
		}

		return false;
	}

	@Override
	public String toString() {
		return "Vector2 [" + this.x + "," + this.y + "]";
	}
}