?此平台的组合为：unity2019+vuforia9.8
建议用2020+vuforia10.2平台，不要用此平台。因当前最新的vuforia10.2不支持unity2019。可vuforia10.2确实是最好用的，包括比例设置和稳定性。
所以本文就大概写一下，详细的还是参看2020那篇。
- Create a new Unity Project.?
- Switch build platform to?UWP.
- Click the?Player Settings -> XR Plugin Management, and install the latest XR Management package and enable the?Windows Mixed Reality?under?Plug-in Providers.
- Import MRTK and Vuforia?
- Go to?Assets?->?Import Package -> Custom Package?and import the MRTK and Vuforia packages.?
- In the?File?menu, select?Build Settings.
- Select?Player Settings?and expand the?Publishing Settings?section.
- Under?Capabilities?ensure that?Internet Client,?WebCam,?Microphone, and?SpatialPerception?are selected.
NOTE:?SpatialPerception?should only be selected if you intend to use the Surface Observer API. - Under?Supported Device Families,?ensure that?Holographic?is selected.?
- Under?Capabilities?ensure that?Internet Client,?WebCam,?Microphone, and?SpatialPerception?are selected.
- Expand the?Resolution and Presentation?section.
- Disable?Run in Background?so that?Vuforia pauses when the app is put into the background and can access the camera again when the app is resumed.
- In the?Default Orientation?dropdown, ensure that?Landscape Left?is selected.
- Close the?Project Settings?window.
- Add the MRTK to each scene using?Mixed Reality Toolkit > Add to Scene and Configure
- In the?MixedRealityToolkit GameObject,?in each scene,?set the configuration profile to the?DefaultHoloLens2ConfigurationProfile.
- Select the Main Camera found as a child of the?MixedRealityPlaySpace?GameObject?and add the?VuforiaBehaviour?component?to it.
- Vuforia engine安装好的菜单位置
Vuforia engine版本安装后的确认?
Main camera方式?
Camera中Open Vuforia engine configuration?
?Vuforia上传image尺寸设置0.21
?Vuforia上传image成功后
Image target选择后的默认比例（不能改，width事关x，改此一个其它会立马自动全改的，为何我传的是0.21这里调入后确实0.3263，还不能改动，否则识别不正常，这样会影响我对最终位置关系的判断，这是我放弃此组合的原因。）
Cube设置
?因比例连城的关系，方块眼镜中看到的实际大小为0.5*0.3263，位置关系不变，在纸张的表面。