Method angle

paper-api/src/main/java/org/bukkit/util/Vector.java:212–216

Gets the angle between this vector and another in radians. @param other The other vector @return angle in radians

(@NotNull Vector other)

     * @return angle in radians
     */
    public float angle(@NotNull Vector other) {
        double dot = Doubles.constrainToRange(dot(other) / (length() * other.length()), -1.0, 1.0);

        return (float) Math.acos(dot);
    }

    /**
     * Sets this vector to the midpoint between this vector and another.