Method rotateAroundZ

src/main/java/org/bukkit/util/Vector.java:471–479

Rotates the vector around the z axis This piece of math is based on the standard rotation matrix for vectors in three dimensional space. This matrix can be found here: Rotation Matrix . @param angle the angle to rotate t

(double angle)

     * @return the same vector
     */
    @NotNull
    public Vector rotateAroundZ(double angle) {
        double angleCos = Math.cos(angle);
        double angleSin = Math.sin(angle);

        double x = angleCos * getX() - angleSin * getY();
        double y = angleSin * getX() + angleCos * getY();
        return setX(x).setY(y);
    }

    /**
     * Rotates the vector around a given arbitrary axis in 3 dimensional space.