This sample demonstrates image tracking. Image tracking is supported on ARCore and ARKit. To enable image tracking, you must first create an `XRReferenceImageLibrary`. This is the set of images to look for in the environment. [Click here](https://docs.unity3d.com/Packages/com.unity.xr.arsubsystems@4.1/manual/image-tracking.html) for instructions on creating one.
There are two samples demonstrating image tracking. Basic and Multi Image tracking are supported on ARCore and ARKit. To enable image tracking, you must first create an `XRReferenceImageLibrary`. This is the set of images to look for in the environment. [Click here](https://docs.unity3d.com/Packages/com.unity.xr.arsubsystems@4.1/manual/image-tracking.html) for instructions on creating one.
At runtime, ARFoundation will generate an `ARTrackedImage` for each detected reference image. This sample uses the [`TrackedImageInfoManager.cs`](https://github.com/Unity-Technologies/arfoundation-samples/blob/master/Assets/Scenes/ImageTracking/TrackedImageInfoManager.cs) script to overlay the original image on top of the detected image, along with some meta data.
Run the sample on an ARCore or ARKit-capable device and point your device at one of the images in [`Assets/Scenes/ImageTracking/Images`](https://github.com/Unity-Technologies/arfoundation-samples/tree/master/Assets/Scenes/ImageTracking/Images). They can be displayed on a computer monitor; they do not need to be printed out.
### BasicImageTracking
At runtime, ARFoundation will generate an `ARTrackedImage` for each detected reference image. This sample uses the [`TrackedImageInfoManager.cs`](https://github.com/Unity-Technologies/arfoundation-samples/blob/master/Assets/Scenes/ImageTracking/BasicImageTracking/TrackedImageInfoManager.cs) script to overlay the original image on top of the detected image, along with some meta data.
Run the sample on an ARCore or ARKit-capable device and point your device at one of the images in [`Assets/Scenes/ImageTracking/Images`](https://github.com/Unity-Technologies/arfoundation-samples/tree/master/Assets/Scenes/ImageTracking/Images). They can be displayed on a computer monitor; they do not need to be printed out.
### MultiImageTracking
With [`MultiTrackedImageInfoManager.cs`](https://github.com/Unity-Technologies/arfoundation-samples/blob/master/Assets/Scenes/ImageTracking/MultiImageTracking/MultiTrackedImageInfoManager.cs) script, you can assign different prefabs for each image in the reference image library.
You can also change prefabs at runtime. This sample includes a button that switch between the original and alternative prefab for the first image in the reference image library. See the script `DynamicPrefab.cs` for example code.
## ObjectTracking
Similar to the image tracking sample, this sample detects a 3D object from a set of reference objects in an `XRReferenceObjectLibrary`. [Click here](https://docs.unity3d.com/Packages/com.unity.xr.arsubsystems@4.1/manual/object-tracking.html) for instructions on creating one.
## Contributions and Pull Requests
We are not accepting pull requests at this time. If you find an issue with the samples, our would like to request a new sample, please [submit a GitHub issue](https://github.com/Unity-Technologies/arfoundation-samples/issues).
We are not accepting pull requests at this time. If you find an issue with the samples, our would like to request a new sample, please [submit a GitHub issue](https://github.com/Unity-Technologies/arfoundation-samples/issues).
Shan Jiang
4 年前