四元数在X和Z轴上不带Y轴

Question

我试图绕X，Y和Z轴旋转播放器。Y轴不应从最后一个角度移动。例如，如果我向左旋转45度，则播放器不应旋转回0。播放器的X和Z轴最多旋转30度，然后在不再使用Input时，将其稳定为0。

经过反复试验，我终于使我的Y角不再Slerp回到0。但是，X和Z仍然认为Y是0度。播放器旋转（假定向左旋转45度），但沿X和Z的移动就好像Y为0度。

我一直在阅读文章和主题，并观看多个领域的视频，包括但不限于StackOverflow，Unity论坛，Unity API和YouTube视频。

当前游戏的视频 -注意引擎排气-X和Z永远不会更改为“相机”视图/“播放器” Y方向的新法线。

        void Update()
    {
        if(!controller.isGrounded)
        {

            //Three degree's
            moveDirection = new Vector3(Input.GetAxis("Horizontal"), Input.GetAxis("Thrust"), Input.GetAxis("Vertical"));
            moveDirection *= speed;

            //rotate around Y-Axis
            transform.Rotate(0, Input.GetAxis("Yaw") * rotationSpeed, 0);
            float currentY = transform.eulerAngles.y; //save Y for later

            //rotation around X and Z
            float tiltAroundX = Input.GetAxis("Vertical") * tiltAngle;
            float tiltAroundZ = -1 * (Input.GetAxis("Horizontal") * tiltAngle);

            Quaternion targetRotation = Quaternion.Euler(tiltAroundX, currentY, tiltAroundZ);

            Vector3 finalRotation = Quaternion.Slerp(transform.rotation, targetRotation, smooth).eulerAngles;
            finalRotation.y = currentY; //reintroduce Y
            transform.rotation = Quaternion.Euler(finalRotation);

        controller.Move(moveDirection * Time.deltaTime);
    }

Answer 1

经过进一步的研究，我走上了不同的道路，我发现存在两个问题。这两个问题都围绕着这样一个事实：旋转后 Z 轴从未标准化为新的 Y 轴度数。@Ruzihm，解决了旋转问题。我解决了当时可见的运动问题。一旦旋转正常工作，这一点就变得显而易见。

transform.forward本质上，在 Y 轴旋转 ( ) 发生任何变化后，必须重新计算Z 轴( Vector3.up)。一旦有了新的法线 ( transform.forward)，运动矢量就需要展平到平面，以防止玩家潜入世界表面。感谢@Ruzihm 的所有帮助。

这是新代码：

//Three degree's
moveDirection = new Vector3(Input.GetAxis("Horizontal"),
                            Input.GetAxis("Thrust"),
                            Input.GetAxis("Vertical"));

//Normalize the movement direction and flatten the Plane
moveDirection = transform.TransformDirection(moveDirection);
moveDirection = Vector3.ProjectOnPlane(moveDirection, Vector3.up);

moveDirection *= speed;

// collect inputs
float yaw = Input.GetAxis("Yaw") * rotationSpeed;
float pitch = Input.GetAxis("Vertical") * tiltAngle;
float roll = -1 * (Input.GetAxis("Horizontal") * tiltAngle);

// Get current forward direction projected to plane normal to up (horizontal plane)
Vector3 forwardCurrent = transform.forward
                        - Vector3.Dot(transform.forward, Vector3.up) * Vector3.up;
// Debug to view forwardCurrent
Debug.DrawRay(transform.position, forwardCurrent * 2, Color.white);

// create rotation based on forward
Quaternion targetRotation = Quaternion.LookRotation(forwardCurrent);

// rotate based on yaw, then pitch, then roll. 
// This order prevents changes to the projected forward direction

targetRotation = targetRotation * Quaternion.AngleAxis(yaw, Vector3.up);


// Debug to see forward after applying yaw
Debug.DrawRay(transform.position, targetRotation * Vector3.forward, Color.red);

targetRotation = targetRotation * Quaternion.AngleAxis(pitch, Vector3.right);
targetRotation = targetRotation * Quaternion.AngleAxis(roll, Vector3.forward);

transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, smooth);


controller.Move(moveDirection * Time.deltaTime);