Math for Game Developers - Distance Comparison

Main class:

package learn.mathforgame.DistanceComparison;

public class Main {

public static void main(String[] args) {

Point p = new Point(0, -1);

Point i = new Point(1, 1);

Point c = new Point(2, -1);

Vector ip = new Vector().subtractPoints(p, i);

Vector cp = new Vector().subtractPoints(p, c);

System.out.println("Result IP: "+new Vector().length(ip));

System.out.println("Result CP: "+new Vector().length(cp));

}

}

Point class:

package learn.mathforgame.DistanceComparison;

public class Point {

private int x, y;

public Point(int x, int y) {

this.x = x;

this.y = y;

}

public int getX() {

return x;

}

public int getY() {

return y;

}

}

Vector Class:

package learn.mathforgame.VectorLength;

public class Vector {

private int x, y;

public Vector() {

}

public Vector(int x, int y) {

this.x = x;

this.y = y;

}

public Vector subtractPoints(Point p, Point i) {

return new Vector(p.getX() - i.getX(), p.getY()-i.getY());

}

public int length(Vector v) {

return ((v.x *v.x) + (v.y*v.y));

}

}