module.exports = class Vector3 {
    /**
     * A 3D vector
     *
     * @param {number} x The X value of this vector
     * @param {number} y The Y value of this vector
     * @param {number} z The Z value of this vector
     */
    constructor(x, y, z) {
        this.x = x;
        this.y = y;
        this.z = z;
    }

    /**
     * Add another vector to this one
     *
     * @param {Vector3} operand The vector to add to this one
     * @returns {void}
     */
    add(operand) {
        this.x += operand.x;
        this.y += operand.y;
        this.z += operand.z;
    }

    /**
     * Flip the sign of all properties of the vector
     *
     * @returns {Vector3} A new Vector3
     */
    negate() {
        return new Vector3(
            -this.x,
            -this.y,
            -this.z,
        );
    }
};