获取设备相机的地理空间姿势
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
将应用的设置配置为使用 Geospatial API 后,您就可以获取设备相机的 AREarthManager.CameraGeospatialPose
。此姿势在 AREarthManager
对象中进行管理,包含以下信息:
- 位置(以纬度和经度表示)
- 海拔高度
- 大致相当于用户在 EUS 坐标系中朝向的方向,其中 X+ 指向东方,Y+ 指向上方,Z+ 指向南方
检查跟踪状态
地理空间值仅在 AREarthManager.EarthTrackingState
为 TrackingState.Tracking
时有效。请务必将所有 Geospatial API 调用封装在 AREarthManager.EarthTrackingState
控制块中。
var earthTrackingState = EarthManager.EarthTrackingState;
if (earthTrackingState == TrackingState.Tracking)
{
// camera_geospatial_pose contains geodetic location, rotation, and
// confidences values.
var cameraGeospatialPose = EarthManager.CameraGeospatialPose;
}
如果 AREarthManager.EarthTrackingState
未变为 TrackingState.Tracking
,则 AREarthManager.EarthTrackingState
可能是 TrackingState.Limited
或 TrackingState.None
。如果这两种情况都不满足,请检查 TrackingState.EarthTrackingState
,其中会显示可能导致 AREarthManager
对象无法跟踪的其他错误状态。
调整姿势以提高准确性
当设备处于默认屏幕方向的竖屏状态时,由于与 AR 跟踪自然对齐,俯仰角 (X+) 和滚动角 (Z+) 通常是精确的。不过,偏航角 (Y+) 可能会因 VPS 数据可用性和相应位置的时间条件而异。您的应用可能需要进行调整以提高准确性。
GeospatialPose.OrientationYawAccuracy
会为特定 AREarthManager.CameraGeospatialPose
的偏航角 (Y+) 提供精度估算值。方向偏摆准确度是一个数字,用于描述 GeospatialPose.EunRotation
中偏摆角度周围第 68 个百分位数置信度的半径(以度为单位)。换句话说,AREarthManager.CameraGeospatialPose
的真实偏航角有 68% 的概率在 GeospatialPose.OrientationYawAccuracy
返回的度数范围内。
值越大,准确性越低。例如,如果估算的偏摆角度为 60 度,且偏摆准确度为 10 度,则真实偏摆角度介于 50 度和 70 度之间的概率为 68%。
后续步骤
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最后更新时间 (UTC):2025-07-14。
[null,null,["最后更新时间 (UTC):2025-07-14。"],[[["\u003cp\u003eAccess the device camera's geospatial pose, including location, altitude, and orientation, using the \u003ccode\u003eAREarthManager.CameraGeospatialPose\u003c/code\u003e after configuring the Geospatial API.\u003c/p\u003e\n"],["\u003cp\u003eEnsure the \u003ccode\u003eAREarthManager.EarthTrackingState\u003c/code\u003e is in the \u003ccode\u003eTrackingState.Tracking\u003c/code\u003e state before using geospatial values to avoid issues caused by limited or no tracking.\u003c/p\u003e\n"],["\u003cp\u003eAccount for potential inaccuracies in the yaw (Y+) angle of the orientation, especially when the device isn't upright, and utilize \u003ccode\u003eGeospatialPose.OrientationYawAccuracy\u003c/code\u003e to estimate the yaw accuracy.\u003c/p\u003e\n"],["\u003cp\u003eUnderstand that the \u003ccode\u003eGeospatialPose.OrientationYawAccuracy\u003c/code\u003e value represents the radius, in degrees, of the 68th percentile confidence level around the yaw angles, with larger values indicating lower accuracy.\u003c/p\u003e\n"]]],[],null,["# Obtain the device camera's Geospatial pose\n\nOnce you have configured your app's settings to use the Geospatial API, you can obtain the device camera's [`AREarthManager.CameraGeospatialPose`](/ar/reference/unity-arf/class/Google/XR/ARCoreExtensions/AREarthManager#camerageospatialpose). This pose, managed in an [`AREarthManager`](/ar/reference/unity-arf/class/Google/XR/ARCoreExtensions/AREarthManager) object, contains the following information:\n\n- Location, expressed in latitude and longitude\n- Altitude\n- An orientation approximating the direction the user is facing in the EUS coordinate system with X+ pointing east, Y+ pointing up, and Z+ pointing south\n\nCheck the tracking state\n------------------------\n\nGeospatial values are only valid while [`AREarthManager.EarthTrackingState`](/ar/reference/unity-arf/class/Google/XR/ARCoreExtensions/AREarthManager#earthtrackingstate) is [`TrackingState.Tracking`](https://docs.unity3d.com/Packages/com.unity.xr.arsubsystems@4.2/api/UnityEngine.XR.ARSubsystems.TrackingState.html). Make sure to wrap all Geospatial API calls in a [`AREarthManager.EarthTrackingState`](/ar/reference/unity-arf/class/Google/XR/ARCoreExtensions/AREarthManager#earthtrackingstate) control block. \n\n var earthTrackingState = EarthManager.EarthTrackingState;\n if (earthTrackingState == TrackingState.Tracking)\n {\n // camera_geospatial_pose contains geodetic location, rotation, and\n // confidences values.\n var cameraGeospatialPose = EarthManager.CameraGeospatialPose;\n }\n\nIf [`AREarthManager.EarthTrackingState`](/ar/reference/unity-arf/class/Google/XR/ARCoreExtensions/AREarthManager#earthtrackingstate) does not become [`TrackingState.Tracking`](https://docs.unity3d.com/Packages/com.unity.xr.arsubsystems@4.2/api/UnityEngine.XR.ARSubsystems.TrackingState.html), [`AREarthManager.EarthTrackingState`](/ar/reference/unity-arf/class/Google/XR/ARCoreExtensions/AREarthManager#earthtrackingstate) may be [`TrackingState.Limited`](https://docs.unity3d.com/Packages/com.unity.xr.arsubsystems@4.2/api/UnityEngine.XR.ARSubsystems.TrackingState.html) or [`TrackingState.None`](https://docs.unity3d.com/Packages/com.unity.xr.arsubsystems@4.2/api/UnityEngine.XR.ARSubsystems.TrackingState.html). If neither of these conditions are true, check [`TrackingState.EarthTrackingState`](/ar/reference/unity-arf/class/Google/XR/ARCoreExtensions/AREarthManager#earthtrackingstate), which shows other error states that may keep the [`AREarthManager`](/ar/reference/unity-arf/class/Google/XR/ARCoreExtensions/AREarthManager) object from tracking.\n\nAdjust the pose for accuracy\n----------------------------\n\nWhen the device is upright in the default orientation, the pitch (X+) and roll (Z+) angles tend to be precise due to a natural alignment with AR tracking. However, the yaw (Y+) angles can vary depending on VPS data availability and temporal conditions at the location. Your app may have to make adjustments for accuracy.\n\n[`GeospatialPose.OrientationYawAccuracy`](/ar/reference/unity-arf/struct/Google/XR/ARCoreExtensions/GeospatialPose#orientationyawaccuracy) provides an accuracy estimate for the yaw (Y+) angles for a certain [`AREarthManager.CameraGeospatialPose`](/ar/reference/unity-arf/class/Google/XR/ARCoreExtensions/AREarthManager#camerageospatialpose). The orientation yaw accuracy is a number that describes the radius, in degrees, of the 68th percentile confidence level around the yaw angles in [`GeospatialPose.EunRotation`](/ar/reference/unity-arf/struct/Google/XR/ARCoreExtensions/GeospatialPose#eunrotation). In other words, there is a 68% chance that the [`AREarthManager.CameraGeospatialPose`](/ar/reference/unity-arf/class/Google/XR/ARCoreExtensions/AREarthManager#camerageospatialpose)'s true yaw angle is accurate within the number of degrees returned by\n[`GeospatialPose.OrientationYawAccuracy`](/ar/reference/unity-arf/struct/Google/XR/ARCoreExtensions/GeospatialPose#orientationyawaccuracy).\n\nLarger values indicate lower accuracy. For example, if the estimated yaw angle is 60 degrees and the yaw accuracy is 10 degrees, then there is a 68% probability that the true yaw angle is between 50 and 70 degrees.\n\nWhat's next\n-----------\n\n- [Place a Geospatial anchor](/ar/develop/unity-arf/geospatial/anchors#wgs84_anchors) by obtaining the anchor's Geospatial pose."]]