Unity 6中CharacterController出现抖动问题，求助。

我在Unity 6中遇到一个奇怪的运动抖动问题。

我的玩家运动是完全在FixedUpdate()方法中处理的。控制器速度是在那里累积的，我调用：

controller.Move(velocity * Time.fixedDeltaTime);

相机(CineMachine)不是问题。通过：

• 不移动鼠标，
• 将游戏速度降低到Time.timeScale = 0.2,
• 观察玩家运动时使用阻尼。

当游戏速度降低时，我可以清晰地看到玩家以小块的跳跃方式前进，而不是平滑地移动。

运动是使用自定义Quake/Source风格加速系统与CharacterController实现的。代码：

private void FixedUpdate()
{
    Move();
    ApplyCounterMovement();
    ApplyFriction();
    ApplyGravity();

    motor.Move(Time.fixedDeltaTime);
}

private void Move()
{
    Vector2 moveInput = input.MoveInput;
    Vector3 wishDirection = GetWishDirection(moveInput);

    if (wishDirection.sqrMagnitude < 0.0001f)
        return;

    wishDirection.Normalize();

    float wishSpeed = isGrounded ? walkWishSpeed : airWishSpeed;
    float accel = isGrounded ? walkAcceleration : airAcceleration;

    Accelerate(wishDirection, wishSpeed, accel);
}

private void Accelerate(Vector3 wishDirection, float wishSpeed, float accel)
{
    Vector3 horizontalVelocity = GetHorizontalVelocity();
    float currentSpeed = Vector3.Dot(horizontalVelocity, wishDirection);

    float addSpeed = wishSpeed - currentSpeed;
    if (addSpeed <= 0f)
        return;

    float accelSpeed = accel * Time.fixedDeltaTime * wishSpeed;
    accelSpeed = Mathf.Min(accelSpeed, addSpeed);

    motor.AddVelocity(wishDirection * accelSpeed);
}

private void ApplyCounterMovement()
{
    if (!isGrounded)
        return;

    if (input.MoveInput.sqrMagnitude < 0.01f)
        return;

    Vector3 wishDirection = GetWishDirection(input.MoveInput).normalized;
    Vector3 horizontalVelocity = GetHorizontalVelocity();

    Vector3 unwantedVelocity =
        horizontalVelocity -
        Vector3.Project(horizontalVelocity, wishDirection);

    motor.AddVelocity(
        -unwantedVelocity *
        counterMovement *
        Time.fixedDeltaTime);
}

private void ApplyFriction()
{
    if (!isGrounded)
        return;

    if (input.MoveInput.sqrMagnitude > 0.01f)
        return;

    Vector3 horizontalVelocity = GetHorizontalVelocity();
    float speed = horizontalVelocity.magnitude;

    float drop = groundFriction * Time.fixedDeltaTime;
    speed = Mathf.Max(speed - drop, 0f);

    horizontalVelocity = horizontalVelocity.normalized * speed;

    motor.SetVelocity(new Vector3(
        horizontalVelocity.x,
        motor.Velocity.y,
        horizontalVelocity.z));
}

private void ApplyGravity()
{
    Vector3 velocity = motor.Velocity;

    if (isGrounded && velocity.y < 0f)
    {
        motor.SetVelocity(new Vector3(
            velocity.x,
            -groundStickVelocity,
            velocity.z));
        return;
    }

    motor.AddVelocity(Vector3.down * gravity * Time.fixedDeltaTime);
}

PlayerMotor.Move()方法仅仅调用：

public CollisionFlags Move(float deltaTime)
{
    Vector3 moveVelocity = Velocity;

    if (IsGrounded && moveVelocity.y < 0f)
        moveVelocity.y = -2f;

    return controller.Move(moveVelocity * deltaTime);
}