UnityARAlignment 在 Unity ARKit 插件中意味着什么？

UnityAR对齐 https://i.stack.imgur.com/uwCOI.png

public enum UnityARAlignment
{
    UnityARAlignmentGravity,
    UnityARAlignmentGravityAndHeading,
    UnityARAlignmentCamera
}

如图所示，开始对齐中有三个选项。我想知道每个选项有什么用？他们的表现如何？我在网上找不到相关信息。

它们尚未记录，但基于ARConfiguration.WorldAlignment https://developer.apple.com/documentation/arkit/arsessionconfiguration/worldalignmentARKit 中的枚举。这UnityARAlignmentGravity, UnityARAlignmentGravityAndHeading and UnityARAlignmentCamera枚举值映射到 Apple 的 ARKitgravity https://developer.apple.com/documentation/arkit/arsessionconfiguration/worldalignment/gravity, gravityAndHeading https://developer.apple.com/documentation/arkit/arsessionconfiguration/worldalignment/gravityandheading and camera https://developer.apple.com/documentation/arkit/arsessionconfiguration/worldalignment/camera分别。

来自 Apple 文档，以下是它们的简短定义。单击每一个以阅读有关它们的更多信息。这主要与性能无关，但有助于配置相机或指南针的方向。

• UnityARAlignment https://developer.apple.com/documentation/arkit/arsessionconfiguration/worldalignment枚举相当于ARConfiguration.WorldAlignment https://developer.apple.com/documentation/arkit/arsessionconfiguration/worldalignment- ARKit 的选项 基于真实设备构建场景坐标系 运动。

• UnityARAlignmentGravity https://developer.apple.com/documentation/arkit/arsessionconfiguration/worldalignment/gravity- 坐标系的y轴是 平行于重力，其原点是物体的初始位置 设备。

• UnityARAlignmentGravityAndHeading https://developer.apple.com/documentation/arkit/arsessionconfiguration/worldalignment/gravityandheading- 坐标系的y轴 与重力平行，其 x 轴和 z 轴面向罗盘 航向，其原点是设备的初始位置。

• UnityARAlignmentCamera https://developer.apple.com/documentation/arkit/arsessionconfiguration/worldalignment/camera- 场景坐标系被锁定 匹配相机的方向。