WindowsでC++で加速度センサーの値をとりたい

ぐぐってもWinRTの情報はよくひっかかるんですけどねぇ。

情報ソースはここらへんを見ればいいらしい。

• Sensor API (Windows)

個人的に超参考になるなと思ったのは以下のサイトです。 Windows* 8 Sensors Sample Application – A Ball in Hole Game Whitepaper | Intel® Developer Zonesoftware.intel.com

ということで、今回はUnity向けにdllとして提供しないといけなかったのでこんな感じになりました。

ヘッダー。

extern"C"
{
    struct PluginVector3
    {
        double x;
        double y;
        double z;
    };

    __declspec (dllexport) PluginVector3 GetAccelerometer();
}

cpp

#include "stdafx.h"#include <InitGuid.h>#include <SensorsApi.h>#include <Sensors.h>#pragma comment(lib, "Sensorsapi.lib")

__declspec (dllexport) PluginVector3 GetAccelerometer()
{
    ISensorManager *pSensorManager;
    ISensorCollection *pMotionSensorCollection;
    ISensor *pMotionSensor;

    if (!SUCCEEDED(::CoCreateInstance(CLSID_SensorManager, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pSensorManager))))
    {
        return PluginVector3();
    }
    if (!SUCCEEDED(pSensorManager->GetSensorsByCategory(SENSOR_TYPE_ACCELEROMETER_3D, &pMotionSensorCollection)))
    {
        pSensorManager->Release();
        return PluginVector3();
    }
    if (!SUCCEEDED(pMotionSensorCollection->GetAt(0, &pMotionSensor)))
    {
        pMotionSensorCollection->Release();
        pSensorManager->Release();
        return PluginVector3();
    }

    ISensorDataReport *pData;
    if (!SUCCEEDED(pMotionSensor->GetData(&pData)))
    {
        pMotionSensor->Release();
        pMotionSensorCollection->Release();
        pSensorManager->Release();
        return PluginVector3();
    }

    PROPVARIANT x = {};
    if (!SUCCEEDED(pData->GetSensorValue(SENSOR_DATA_TYPE_ACCELERATION_X_G, &x)))
    {
        pData->Release();
        pMotionSensor->Release();
        pMotionSensorCollection->Release();
        pSensorManager->Release();
        return PluginVector3();
    }
    PROPVARIANT y = {};
    if (!SUCCEEDED(pData->GetSensorValue(SENSOR_DATA_TYPE_ACCELERATION_Y_G, &y)))
    {
        pData->Release();
        pMotionSensor->Release();
        pMotionSensorCollection->Release();
        pSensorManager->Release();
        return PluginVector3();
    }
    PROPVARIANT z = {};
    if (!SUCCEEDED(pData->GetSensorValue(SENSOR_DATA_TYPE_ACCELERATION_Z_G, &z)))
    {
        pData->Release();
        pMotionSensor->Release();
        pMotionSensorCollection->Release();
        pSensorManager->Release();
        return PluginVector3();
    }

    pData->Release();
    pMotionSensor->Release();
    pMotionSensorCollection->Release();
    pSensorManager->Release();

    PluginVector3 v;
    v.x = x.dblVal;
    v.y = y.dblVal;
    v.z = z.dblVal;
    return v;
}

これをUnityのプラグイン機能で取り込むことで、Win32でも加速度センサー使えるようになりそうだ。