OpenDoor.Update C# (CSharp) Method

    void Update()
    {
        if (isEmptyDoorMaterial() && isButtonUp)
        {
            this.renderer.material.SetTexture("_MainTex", DoorBlinTexture[0]);
        }

        ForB();

        //whether player is front of the door MinDistance or not
        if (Trigger() <= MinDistance || isMotion)
        {

            if (!isOpen || isMotion)
            {
                if (isEmptyDoorMaterial() && Trigger() <= MinDistance)
                {
                    this.renderer.material.SetTexture("_MainTex", DoorBlinTexture[1]);
                }
                if (isFront)
                {
                    if (onMouseClick)
                    {
                        isMotion = true;
                        Vector3 rotate;
                        rotate = this.transform.localEulerAngles;
                        rotate.y += OpeningSpeed;
                        this.transform.localEulerAngles = rotate;

                        AngleCount += OpeningSpeed;

                        if (AngleCount >= 90)
                        {
                            rotate = this.transform.localEulerAngles;
                            rotate.y = Rotate_Y + 90;
                            this.transform.localEulerAngles = rotate;
                            isOpen = true;
                            onMouseClick = false;
                            AngleCount = 0;
                            isMotion = false;
                            isOpenIn = true;
                        }
                    }
                }
                else
                {
                    if (onMouseClick)
                    {
                        isMotion = true;
                        Vector3 rotate;
                        rotate = transform.localEulerAngles;
                        rotate.y -= OpeningSpeed;
                        transform.localEulerAngles = rotate;

                        AngleCount -= OpeningSpeed;

                        if (AngleCount <= -90)
                        {
                            rotate = transform.localEulerAngles;
                            rotate.y = Rotate_Y - 90;
                            transform.localEulerAngles = rotate;
                            isOpen = true;
                            onMouseClick = false;
                            AngleCount = 0;
                            isMotion = false;
                            isOpenIn = false;
                        }
                    }
                }
            }
        }
        else
        {
            if (isOpen && (!isMotion))
            {
                if (isOpenIn)
                {
                    Vector3 rotate;
                    rotate = transform.localEulerAngles;
                    rotate.y -= OpeningSpeed;
                    transform.localEulerAngles = rotate;

                    AngleCount -= OpeningSpeed;

                    if (AngleCount <= -90)
                    {
                        rotate = transform.localEulerAngles;
                        rotate.x = Rotate_X;
                        rotate.y = Rotate_Y;
                        rotate.z = Rotate_Z;
                        transform.localEulerAngles = rotate;
                        isOpen = false;
                        AngleCount = 0;
                        isMotion = true;
                    }
                }
                else
                {
                    Vector3 rotate;
                    rotate = transform.localEulerAngles;
                    rotate.y += OpeningSpeed;
                    transform.localEulerAngles = rotate;

                    AngleCount += OpeningSpeed;

                    if (AngleCount >= 90)
                    {
                        rotate = transform.localEulerAngles;
                        rotate.y = Rotate_Y;
                        transform.localEulerAngles = rotate;
                        isOpen = false;
                        AngleCount = 0;
                        isMotion = true;
                    }
                }
            }
        }
    }