Unity Gyroscope 重置相机位置（如 oculus 重新定位相机）

Question

我正在为 android/ios 制作一个支持陀螺仪的应用程序，您可以在其中使用您的陀螺仪环顾四周。我想让玩家重置他们的相机位置（在设备前面重新居中场景），但我无法让系统为此工作。

这是环顾四周的代码：

using UnityEngine;
using System.Collections;

public class CameraControl : MonoBehaviour {
    void Start () {
        if (SystemInfo.supportsGyroscope) {
            Input.gyro.enabled = true;

            //Create parent object and set this object's parent to that
            GameObject camParent = new GameObject ("CamParent");
            camParent.transform.position = transform.position;
            transform.parent = camParent.transform;

            // Rotate the parent object by 90 degrees around the x axis
            camParent.transform.Rotate (Vector3.right, 90);
        }
    }

    void Update () {
        if (SystemInfo.supportsGyroscope) {
            Quaternion rotation = new Quaternion (Input.gyro.attitude.x, Input.gyro.attitude.y, -Input.gyro.attitude.z, -Input.gyro.attitude.w);
            transform.localRotation = rotation;
        }
    }

    void OnGUI () {
        if (SystemInfo.supportsGyroscope) {
            GUILayout.Label (transform.localRotation.ToString());
            GUILayout.Label (transform.parent.rotation.ToString());

            if (GUILayout.Button ("Recenter View")) {
                //RECENTER THE CAMERA VIEW
            }
        }
    }
}

Answer 1

您需要添加一个原点旋转 - 将您的旋转旋转一个与您要重置的旋转相反的四元数。

在你的情况下，这将是：

using UnityEngine;
using System.Collections;

public class CameraControl : MonoBehaviour {
    void Start () {
        if (SystemInfo.supportsGyroscope) {
            Input.gyro.enabled = true;

            //Create parent object and set this object's parent to that
            GameObject camParent = new GameObject ("CamParent");
            camParent.transform.position = transform.position;
            transform.parent = camParent.transform;

            // Rotate the parent object by 90 degrees around the x axis
            camParent.transform.Rotate (Vector3.right, 90);
        }
    }

    Quaternion origin = Quaternion.identity;

    void Update () {
        if (SystemInfo.supportsGyroscope) {
            Quaternion rotation = new Quaternion (Input.gyro.attitude.x, Input.gyro.attitude.y, -Input.gyro.attitude.z, -Input.gyro.attitude.w);
            transform.localRotation = rotation * origin;
        }
    }

    void OnGUI () {
        if (SystemInfo.supportsGyroscope) {
            GUILayout.Label (transform.localRotation.ToString());
            GUILayout.Label (transform.parent.rotation.ToString());

            if (GUILayout.Button ("Recenter View")) {
                //RECENTER THE CAMERA VIEW
                origin = Quaternion.Inverse(transform.localRotation);
            }
        }
    }
}