Method rotateAroundX

src/main/java/org/bukkit/util/Vector.java:427–435

Rotates the vector around the x 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 rotateAroundX(double angle) {
        double angleCos = Math.cos(angle);
        double angleSin = Math.sin(angle);

        double y = angleCos * getY() - angleSin * getZ();
        double z = angleSin * getY() + angleCos * getZ();
        return setY(y).setZ(z);
    }

    /**
     * Rotates the vector around the y axis.