檢測谷歌紙板磁性按鈕點擊

Question

我正在開發與紙板的VR應用程序。當我點擊兩次磁性按鈕時，我想要菜單出現。

如何在C＃中編寫此條件？

Answer 1

總之，你需要檢測到您的手機上的羅盤改變沒有任何傾斜（即磁鐵接近了電話，並擾亂了指南針，而不改變其物理方向）。

你會想看看這兩個載體，看看他們是否已經改變。

有兩個開源實現，這是最簡單的我無恥地包括下面（從祕方運動會信貸安德魯·懷特）：

1. http://www.andrewnoske.com/wiki/Unity_-_Detecting_Google_Cardboard_Click
2. https://github.com/CaseyB/UnityCardboardTrigger/blob/develop/MagnetSensor.cs

/*  -- MIT/X11 like license -- 
Copyright (c) 2014 Paramita ltd, (Secret Ingredient Games) 
*/ 

// 
// Google Cardboard click code in C# for Unity. 
// Author: Andrew Whyte 
// 
using UnityEngine; 
using System.Collections; 
using System; 
using System.Runtime.Serialization.Formatters.Binary; 
using System.IO; 

//public static XmlDocument XmlDoc; 
//public static XmlNodeList xnl; 
//public TextAsset TA; 

public class magneticClick { 
    // Concept: two FIR filters, running on Magnetics and tilt. 
    // If the tilt hasn't changed, but the compass has, then the magnetic field moved 
    // without device this is the essence of a cardboard magnet click. 
    private Vector3 lastTiltVector; 
    public float tiltedBaseLine = 0f; 
    public float magnetBaseLine = 0f; 

    public float tiltedMagn = 0f; 
    public float magnetMagn = 0f; 

    private int N_SlowFIR = 25; 
    private int N_FastFIR_magnet = 3; 
    private int N_FastFIR_tilted = 5; // Clicking the magnet tends to tilt the device slightly. 


    public float threshold = 1.0f; 

    bool click = false; 
    bool clickReported = false; 

    public void init() { 
    Input.compass.enabled = true; 

    // Note that init is platform specific to unity. 
    magnetMagn = Input.compass.rawVector.magnitude; 
    magnetBaseLine = Input.compass.rawVector.magnitude; 
    tiltedBaseLine = Input.acceleration.magnitude; 
    tiltedMagn = Input.acceleration.magnitude; 
    } 

    public void magUpdate(Vector3 acc, Vector3 compass) { 
    // Call this function in the Update of a monobehaviour as follows: 
    // <magneticClickInstance>.magUpdate(Input.acceleration, Input.compass.rawVector); 

    // we are interested in the change of the tilt not the actual tilt. 
    Vector3 TiltNow = acc; 
    Vector3 motionVec3 = TiltNow - lastTiltVector; 
    lastTiltVector = TiltNow; 

    // update tilt and compass "fast" values 
    tiltedMagn = ((N_FastFIR_tilted-1) * tiltedMagn + motionVec3.magnitude)/N_FastFIR_tilted; 
    magnetMagn = ((N_FastFIR_magnet-1) * magnetMagn + compass.magnitude)/N_FastFIR_magnet; 

    // update the "slow" values 
    tiltedBaseLine = ((N_SlowFIR-1) * tiltedBaseLine + motionVec3.magnitude)/N_SlowFIR; 
    magnetBaseLine = ((N_SlowFIR-1) * magnetBaseLine + compass.magnitude)/N_SlowFIR; 

    if(tiltedMagn < 0.2 && (magnetMagn/magnetBaseLine) > 1.1 ) { 
     if(clickReported == false) { 
     click = true; 
     } 
     clickReported = true; 
    } else { 
     clickReported = false; 
    } 
    } 

    public bool clicked() { 
    // Basic premise is that the magnitude of magnetic field should change while the 
    // device is steady. This seems to be suiltable for menus etc. 

    // Clear the click by reading (so each 'click' returns true only once) 
    if(click == true) { 
     click = false; 
     return true; 
    } else { 
     return false; 
    } 
    } 
}