# 构建第一个XR应用

本教程帮助您在 Unity 中构建您的第一个 XR 应用程序。这是一个基本的应用程序，它介绍了主要的 Unity 概念，例如 3D 对象、组件和构建设置。

## 添加XR Plugin预制体

1. 新建场景将里面的Main Camera，Directional Light删除

<figure><img src="/files/b27BvOTn8M8r1p7hAbus" alt=""><figcaption></figcaption></figure>

2. 进入Packages/RayNeo OpenXR ARDK/SDK/Runtime/Resources/Prefab目录,将XR Plguin预制体拖入场景中

<figure><img src="/files/4SBl8nVZ9MSHieXLojjt" alt=""><figcaption></figcaption></figure>

3. XR Plugin包含以下元素：

<figure><img src="/files/v08yZ8vSAZnqCWhFMOYm" alt=""><figcaption></figcaption></figure>

<table data-header-hidden><thead><tr><th width="170"></th><th></th></tr></thead><tbody><tr><td>元素</td><td>说明</td></tr><tr><td>XR Plugin</td><td>主物体</td></tr><tr><td>LaserBeam</td><td>Camera对应射线控制单元</td></tr><tr><td>BeamGraphic<br></td><td>射线绘制器，绘制射线在空间中的位置，并能让用户感知到，可关闭。</td></tr><tr><td>LaserBeamDot</td><td>射线与物体的交互点，当射线碰撞到物体时，会在碰撞点展示。</td></tr><tr><td>Head</td><td>眼镜3DoF对应相机控制单元</td></tr></tbody></table>

4. 设置Game视图分辨率:在Game视图中,新增一个分辨率640X480(请根据实际设备设置分辨率)

<figure><img src="/files/D6iAk7phsEBGFursK6WJ" alt=""><figcaption></figcaption></figure>

## 添加按钮和输入框

### 1.创建按钮

在Hierarchy窗口中，右键>UI>Legacy>Button

<figure><img src="/files/b2pBnYNlhq2XxRhL77BO" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/nCUagb7I1x746l7G6hqS" alt=""><figcaption></figcaption></figure>

### 2.配置Canvas

1. 选中Canvas，并选择Render Mode为World Space，将RectTransform组件Pos属性设置为（0,0,1000） .同时修改按钮的属性如下图

<figure><img src="/files/6SEOSamMnyK38uMo2XsP" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/bE2AOAkidrevfW4miTah" alt=""><figcaption></figcaption></figure>

2. 需要删除canvas下原有Graphic Raycaster,并添加我们的XRGraphicRaycaster

<figure><img src="/files/ms3D513sLpXMIibZ3eXJ" alt=""><figcaption></figcaption></figure>

### 3.打包并运行

1. 将当前场景加入Scenes In Build中,并点击Build And Run等待进度条完成即可.

<figure><img src="/files/3YTNmzFljdv2KAfCDa4W" alt=""><figcaption></figcaption></figure>

2. 我们在scrcpy中看到双目成功渲染,并且3DoF头控也表现正常.单机镜腿,Button按钮有事件响应.

<figure><img src="/files/u6um5BcjKN6RYoi56vb0" alt=""><figcaption></figcaption></figure>


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