Math for Game Developers - Character Movement 4 (Vector Scaling)

Main class:

public class Main {

public static void main(String[] args) {

Vector v= new Vector(3,4);

System.out.println("Initial Speed: "+v.length());

System.out.println("Double Speed: "+v.scalingSpeed(2));

System.out.println("Halved Speed: "+v.scalingSpeed(0.5f));

}

}

Vector Class:

public class Vector {

private float x, y;

public Vector() {

}

public Vector(float x, float y) {

this.x = x;

this.y = y;

}

public float length() {

return (float) Math.sqrt((x*x) + (y*y));

}

public float scalingSpeed(float times) {

return times*length();

}

}