Method rotateAroundY

paper-api/src/main/java/org/bukkit/util/Vector.java:465–473

Rotates the vector around the y 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

(double angle)

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

        double x = angleCos * getX() + angleSin * getZ();
        double z = -angleSin * getX() + angleCos * getZ();
        return setX(x).setZ(z);
    }

    /**
     * Rotates the vector around the z axis