added negative position/motion and updated jar

Author: EnderCrypt

EndersPositionLibrary.jar

@@ -0,0 +1,52 @@
+package com.endercrypt.library.position;
+
+import java.io.Serializable;
+
+public class DownsideMotion extends Motion
+{
+	private static final long serialVersionUID = -1510348838797560540L;
+
+	/**
+	 *  this class basically just reverses all Y positions
+	 */
+
+	public DownsideMotion()
+	{
+		super();
+		// TODO Auto-generated constructor stub
+	}
+
+	public DownsideMotion(double x, double y)
+	{
+		super(x, y);
+		// TODO Auto-generated constructor stub
+	}
+
+	public DownsideMotion(Motion motion)
+	{
+		super(motion);
+		// TODO Auto-generated constructor stub
+	}
+
+	@Override
+	public void setMotion(double direction, double length)
+	{
+		double x = Math.cos(direction) * length;
+		double y = -Math.sin(direction) * length;
+		set(x, y);
+	}
+
+	@Override
+	public void addMotion(double direction, double length)
+	{
+		double x = Math.cos(direction) * length;
+		double y = -Math.sin(direction) * length;
+		add(x, y);
+	}
+
+	@Override
+	public double getDirection()
+	{
+		return Math.atan2(-y, x);
+	}
+}

src/com/endercrypt/library/position/DownsideMotion.java

@@ -0,0 +1,58 @@
+package com.endercrypt.library.position;
+
+import java.awt.Point;
+import java.awt.geom.Point2D;
+import java.awt.geom.Point2D.Double;
+import java.io.Serializable;
+
+public class DownsidePosition extends Position
+{
+	private static final long serialVersionUID = 1448197238813213458L;
+
+	/**
+	 * 
+	 */
+
+	public DownsidePosition()
+	{
+		super();
+		// TODO Auto-generated constructor stub
+	}
+
+	public DownsidePosition(double x, double y)
+	{
+		super(x, y);
+		// TODO Auto-generated constructor stub
+	}
+
+	public DownsidePosition(Double point)
+	{
+		super(point);
+		// TODO Auto-generated constructor stub
+	}
+
+	public DownsidePosition(Point point)
+	{
+		super(point);
+		// TODO Auto-generated constructor stub
+	}
+
+	public DownsidePosition(Position position)
+	{
+		super(position);
+		// TODO Auto-generated constructor stub
+	}
+
+	@Override
+	public double direction(double x, double y)
+	{
+		return Math.atan2((y - this.y), (x - this.x));
+	}
+
+	@Override
+	public void add(double direction, double length)
+	{
+		x += Math.cos(direction) * length;
+		y += -Math.sin(direction) * length;
+	}
+}

src/com/endercrypt/library/position/DownsidePosition.java

@@ -76,10 +76,10 @@ public double direction(double x, double y)
 		return Math.atan2((y - this.y), (x - this.x));
 	}
 
-	public void add(Motion vector)
+	public void add(Motion motion)
 	{
-		x += vector.x;
-		y += vector.y;
+		x += motion.x;
+		y += motion.y;
 	}
 
 	public void add(double direction, double length)