# History of UtilityClass

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Revision 16 . . (edit) March 11, 2006 15:45 EST by AvihooI
Revision 14 . . March 11, 2006 15:20 EST by AvihooI
Revision 11 . . (edit) October 26, 2005 2:30 EST by Voidious [minor question answered]

Difference (from prior major revision) (minor diff, author diff)

 Here's a Vector2D class that I wrote, feel free to use it (AvihooI): ` /*For this class, sin and cos are inversed because robocode requires it *Also, the angles are in Radians */ public class Vector2D { double x,y; //Vector coordinates //Cartesian Representation public double getX() { return x; } public double getY() { return y; } public void setX(double sX) { x = sX; } public void setY(double sY) { y = sY; } //Polar representation public double getMagnitude() { return Math.sqrt(Math.pow(x,2) + Math.pow(y,2)); } public double getDirection() { return Math.atan2(x,y); } public void setMagnitude(double sMagnitude) { double theta = getDirection(); x = sMagnitude * Math.sin(theta); y = sMagnitude * Math.cos(theta); } public void setDirection(double sDirection) { double magnitude = getMagnitude(); x = magnitude * Math.sin(sDirection); y = magnitude * Math.cos(sDirection); } //Vectorial manipulations public Vector2D Normalise() { double theta = getDirection(); return new Vector2D(Math.sin(theta), Math.cos(theta)); } public Vector2D Add(Vector2D sVector2D) { return new Vector2D(x + sVector2D.x, y + sVector2D.y); } public Vector2D Substract(Vector2D sVector2D) { return new Vector2D( x- sVector2D.x, y - sVector2D.y); } public Vector2D Inverse() { return new Vector2D(-x,-y); } public double Dot(Vector2D sVector2D) { return Math.sqrt(x * sVector2D.x + y * sVector2D.y); } public Vector2D Multiply(double sScalar) { return new Vector2D(x * sScalar, y * sScalar); } public Vector2D(double sX, double sY) { x = sX; y = sY; } public Point2D.Double translateToPoint() { return new Point2D.Double(x,y); } public Point2D.Double translateToPoint(Point2D.Double source) { return new Point2D.Double(source.x + x, source.y + y); } } `