如何检测Unity中的Android手机旋转?

时间:2017-02-09 15:47:51

标签: android unity3d rotation gyroscope

在我的Unity应用程序中,我想检测一下,如果一个横向倾斜的Android手机向上或向下倾斜 - 例如像这样:https://lh3.ggpht.com/A-9UCSQn7nujEMF5qmJir2YKIHbu3ehFneELSXprBBId_TYhVONTCd3guPUgQ-qte6GO=h900-rw

旋转矢量传感器可能是我正在寻找的工具,但我没有找到如何使用Unity访问它。 我不希望它依赖于速度,我只需要知道,如果手机正面向地板或天空。

如何检测旋转?

3 个答案:

答案 0 :(得分:0)

我相信你必须使用Gyroscope.attitude

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Update() {
        transform.rotation = Input.gyro.attitude;
    }
}

参考:https://docs.unity3d.com/ScriptReference/Gyroscope-attitude.html

答案 1 :(得分:0)

正如@Demon 提到的,您需要使用 Input.gyro.attitude,但您需要注意以下几点:

#1 确保设备有陀螺仪:

if (!SystemInfo.supportsGyroscope)
{
    // Exit with message
}

#2 确保开启陀螺仪

Input.gyro.enabled = true;

#3 将陀螺仪的右手坐标系转换为 Unity 的左手坐标系:

    private static Quaternion GyroToUnity(Quaternion q)
    {
        return new Quaternion(q.x, q.y, -q.z, -q.w);
    }

*** 编辑 ***

这是获取手机倾斜方向的组件:

using System;
using UnityEngine;
using UnityEngine.UI;

public class Orientation : MonoBehaviour
{
    public Text textComponent;
    public GameObject blockText;
    Gyroscope gyro;
    float initAng;

    const float angTolerance = 20;

    Quaternion gyroCalibration;
    void Start()
    {
        // Make sure device supprts Gyroscope
        if (!SystemInfo.supportsGyroscope) throw new Exception("Device does not support Gyroscopoe");

        gyro = Input.gyro;
        gyro.enabled = true;    // Must enable the gyroscope

        textComponent = GameObject.Find("Text").GetComponent<Text>();
        blockText = GameObject.Find("Block Text");

        Quaternion attitude = Attitude();
        initAng = Elevation(attitude);
    }

    // Update is called once per frame
    void Update()
    {

        Quaternion attitude = Attitude();
        float ang = Elevation(attitude) - initAng;

        String dirStr;
        if (ang < -angTolerance)
           dirStr = "Down";
        else if (ang > angTolerance)
            dirStr = "Up";
        else
            dirStr = "Center";

        textComponent.text = ang.ToString() + "\n" + dirStr;    // +ang = up   -ang = down
    }

    private Quaternion Attitude()
    {
        Quaternion rawAttitude = gyro.attitude;             // Get the phones attitude in phone space
        Quaternion attitude = GyroToUnity(rawAttitude);     // Convert phone space to Unity space

        return attitude;
    }

    private static Quaternion GyroToUnity(Quaternion q)
    {
        return Quaternion.Euler(90, 0, 0) * new Quaternion(q.x, q.y, -q.z, -q.w);
    }

    private static float Elevation(Quaternion attitude)
    {
        Vector3 dir = attitude * Vector3.forward;           // Convert Quaterinon to Dir
        Vector2 horizontalDir = new Vector2(dir.x, dir.z);
        float horizontalDis = horizontalDir.magnitude;
        float ang = Mathf.Atan2(dir.y, horizontalDis) * Mathf.Rad2Deg;  // Calculate the elevation

        return ang;
    }
}

您可以只使用“deviceOrientation()”,但这样做有两个优点:

#1 您可以控制手机需要倾斜多远才能注册倾斜 使用 deviceOrientation 您必须在手机注册倾斜之前将手机倾斜很远

#2 它使用设备起始高度作为参考,以补偿用户通常将手机略微向下或向上保持

答案 2 :(得分:0)

实现这一目标的最简单方法之一是使用 Input.deviceOrientation。

if (Input.deviceOrientation == DeviceOrientation.Portrait)

if (Input.deviceOrientation == DeviceOrientation.LandscapeLeft)

您还可以检查: 未知、人像、PortraitUpsideDown、LandscapeLeft、LandscapeRight、FaceUp 和FaceDown。

看看: https://docs.unity3d.com/ScriptReference/Input-deviceOrientation.html