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# Getting start with AR foundation in Unity ###### tags: `Unity` `Software` ## AR foundation是什麼? AR foundation是Unity遊戲引擎中開發AR (Augmented Reality)擴增實境的插件,它整合了開發Android應用程式的ARCore和開發IOS應用程式的ARKit。 更多說明:[Unity Manual - About AR Foundation](https://docs.unity3d.com/Packages/com.unity.xr.arfoundation@4.2/manual/index.html) ## 系統要求 AR foundation系統要求: ### Android #### 硬體 * 一個能支援ARCORE的Android設備或模擬器 * 將Android設備連接到開發機器(電腦)的USB傳輸線 #### 軟體 * Unity 2019.4.3f1以上版本 * [Android Build Support](https://docs.unity3d.com/Manual/GettingStartedAddingEditorComponents.html) (於安裝Unity選擇之Modules) ### iOS #### 硬體 * 一個能支援ARCORE的iOS設備或模擬器 * 將iOS設備連接到開發機器(電腦)的USB傳輸線 #### 軟體 * Unity 2019.4.3f1以上版本 * [iOS Build Support](https://docs.unity3d.com/Manual/GettingStartedAddingEditorComponents.html) (於安裝Unity選擇之Modules) * [Xcode 11.0以上版本](https://developer.apple.com/xcode/) 更多說明:[Google ARCore - AR Foundation 入門](https://developers.google.com/ar/develop/unity-arf/getting-started-ar-foundation) ## 操作版本 不同版本Unity的環境建置操作略有不同,本Documentation所操作的軟體版本為下列: * Unity 2020.3.27f1 * AR foundation 4.1.9 * ARCore XR Plugin 4.1.9 ## 安裝Unity 安裝並開啟[Unity Hub](https://unity3d.com/get-unity/download),於Install選單中,點選右上方"ADD" button,並選擇所要之Unity版本並安裝。 ![](https://i.imgur.com/kCezhjm.png) 於彈出之"Add Moduales"視窗中,選擇所要匯出及運行之設備系統:Android設備選擇Android Build Support (包含Android SDK & NDK和Open JDK);iOS設備選擇iOS Build Support,選擇完畢後按"Done",這些Modules (Android Build Support, iOS Build Support...)便會與Unity一同安裝。 ![](https://i.imgur.com/AD67H2G.png) 安裝完畢後想要更動Modules,只要於Unity Hub > Installs的Unity版本右上方選單 (三個點)選擇Add Modules便可修改。 ![](https://i.imgur.com/HeSoBCi.png) ## Android系統開發設定 開發Andriod系統應用程式,必須使用Windows作業系統開發。 ### 1. Package Manager 於Package Manager安裝AR foundation及開發特定Platform (Android, iOS, ...)的插件包。 路徑:Windows > Package Manager > Unity Registry 本次操作包含以下: * AR foundation 4.1.9 * ARCore XR Plugin 4.1.9 ![](https://i.imgur.com/CePNZak.png) ### 2. Project Setting 於Project Settings的XR Plug-in Management視窗中,勾選Plug-in Providers中"ARCore"來啟用剛剛安裝之ARCore插件。 路徑:Edit > Project Settings > XR Plug-in Management ![](https://i.imgur.com/J9eKoVL.png) ### 3. Build Setting 於Build Settings視窗中,切換至"Android" (於Platform中選擇Android,並點選"Switch Platform" button),無須修改其設定。 路徑:File > Build Settings ![](https://i.imgur.com/3hWa226.png) ### 4. Player Setting 於Player Settings視窗中,設定匯出程式安裝包的設定。 路徑:File > Build Settings > Player Settings > Other Settings (或Edit > Project Settings > Player) 於Other Settings中設定以下幾個項目: **Package Name** Create a unique app ID using a Java package name format. For example, use com.example.helloAR. * Company Name * Product Name **Rendering** * 取消勾選Auto Graphics API * 取消Vulkan被列在Graphics APIs中 * 取消勾選Multithreaded Rendering **Minimum API Level** * 如果是開發 [AR Required](https://developers.google.com/ar/develop/unity-arf/enable-arcore) app,選擇 *Android 7.0 'Nougat' (API Level 24)* 或更新之版本 * 如果是開發 [AR Optional](https://developers.google.com/ar/develop/unity-arf/enable-arcore) app,選擇 *Android API Level 14* 或更新之版本 **Scripting Backend** * 選擇IL2CPP * 不是Mono **Target Architectures** * 選擇ARM64 (支援64位ARM) * 不是ARMv7 (支援32位ARM) ![](https://i.imgur.com/t9zCa94.png) ![](https://i.imgur.com/kagtdCb.png) **Youtube References** [AR in Unity [02] - Install and Setup AR Foundation](https://www.youtube.com/watch?v=Wefzs2kgUVA) [AR Foundation & Unity 01: Setup for Android](https://www.youtube.com/watch?v=0mpsiO2lCx0&t=2s) ## iOS系統開發設定 開發iOS系統應用程式,必須使用Mac OS作業系統開發。雖然有方法可以用Windows開發,但容易會出現問題,不建議使用Windows開發iOS系統應用程式。 Under construction... **Youtube References** [AR Foundation & Unity 02: Setup for iOS](https://www.youtube.com/watch?v=eu_eG0eTFlA&list=PL6VJLOFcTt7awvyIGIbLLPOBrW6-Y1R-J&index=2) ## AR 基本設置 刪除預設之Main Camera,並於Hierarchy底下之XR選項中新增"AR Session Origin"和"AR Session"。 ![](https://i.imgur.com/0dNCbo3.png) 在AR Session Origin中有一AR Camera,並於其Tag中設定它為MainCamera,之後在AR Camera的範圍中放置物件即可。 ![](https://i.imgur.com/BommIJ8.png)

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