layout: post title: 使用Driver_NULL驱动模拟SteamVR外围设备 categories: [VR] description: 使用Driver_NULL驱动模拟SteamVR外围设备 keywords: VR,OpenVR, SteamVR —
Driver_NULL 模式是SteamVR用于编写其他设备的示例程序，同时也可以使用它来在没有安装VR设备的PC上调试运行我们的程序。以下是streamVR 配置说明：
https://developer.valvesoftware.com/wiki/SteamVR/steamvr.vrsettings
steamvr.vrsettings is a json file in the format below. To enable a key remove the // in front of the particular line. Usually only low-level programmers need to set any of these keys. This file lives in the “config” directory under Steam.
{
"jsonid" : "vrsettings",
"steamvr" : {
// "ipd": 0.0635,
// "forcedDriver": "null",
// "forcedHmd": "",
// "requireHmd": true,
// "displayDebug": false,
// "enableDistortion": true,
// "displayDebugX": 0,
// "displayDebugY": 0,
// "sendSystemButtonToAllApps": false,
// "loglevel": 3,
// "background": "backgrounds/image_%d.png", (now requires fully qualified path)
// "backgroundCameraHeight": 1.6,
// "backgroundDomeRadius": 10.0, (0.0 == Infinite)
// "directMode": true,
// "usingSpeakers": true, (only works in some Unity games current)
// "speakersForwardYawOffsetDegrees": 90.0,
// "renderTargetMultiplier": 1.0
// ^ Make sure your last entry does not include a trailing comma (use jslint when in doubt to verify format).
},
"driver_lighthouse": {
// "disableimu": false,
// "usedisambiguation": "tdm",
// "disambiguationdebug": 0,
// "primarybasestation": 0,
// "lighthousename": "",
// "maxincidenceangledegrees": 60.0,
// "uselighthousedirect": true,
// "dbhistory": false
},
"driver_null" : {
// drivers are searched in alphabetical order, so you may need steamvr.forcedDriver="null" as well
// "enable": true,
// "id": "Null Driver",
// "serialNumber": "Null 4711",
// "modelNumber": "Null Model Number",
// "windowX": 100,
// "windowY": 100,
// "windowWidth": 1920,
// "windowHeight": 1080,
// "renderWidth": 1344,
// "renderHeight": 1512,
// "secondsFromVsyncToPhotons": 0.1,
// "displayFrequency": 90
},
"version" : "1"
}
SteamVR Driver开发文档： https://github.com/ValveSoftware/openvr/wiki/Driver-Documentation
设置Driver_NULL 模式 启用本地无VR设备运行程序的steamvr.setting 配置：
{
"steamvr": {
"background": "D:\\Program Files (x86)\\ViveSetup\\SteamVR\\resources\\backgrounds\\viveNight.png",
"activateMultipleDrivers" : true,
"forcedDriver": "null"
},
"driver_null" : {
"enable": true,
"id": "Null Driver",
"serialNumber": "Null 4711",
"modelNumber": "Null Model Number",
"windowX": 100,
"windowY": 100,
"windowWidth": 1920,
"windowHeight": 1080,
"renderWidth": 1344,
"renderHeight": 1512,
"secondsFromVsyncToPhotons": 0.1,
"displayFrequency": 90
}
}
透过使用以上参数配置，就可以模拟vr设备，运行vr程序。
参考：
UE论坛话题：No steamvr tracking without hmd? https://answers.unrealengine.com/questions/704671/no-steamvr-tracking-without-hmd.html
不花冤枉钱!免VR头显使用Vive追踪器教程: http://www.sohu.com/a/131260636_248541