public void setVertex2(final int x, final int y, final int z) {
        if (this.x2 != null && this.y2 != null && this.z2 != null && this.x2 == x && this.y2 == y && this.z2 == z) return;

        this.x2 = x;
        this.y2 = y;
        this.z2 = z;
        this.refresh();
    }