Mendeteksi bidang menggunakan ARCore untuk Jetpack XR
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Simpan dan kategorikan konten berdasarkan preferensi Anda.
ARCore untuk Jetpack XR dapat mendeteksi permukaan datar di lingkungan pengguna dan memberikan informasi tentang permukaan tersebut seperti pose, ukuran, dan orientasinya. Hal ini dapat membantu aplikasi Anda menemukan platform seperti meja untuk menempatkan objek.
Deteksi bidang tidak diaktifkan secara default pada sesi XR. Untuk mengaktifkan pelacakan bidang, konfigurasikan sesi dan tetapkan mode PlaneTrackingMode.HORIZONTAL_AND_VERTICAL:
valnewConfig=session.config.copy(planeTracking=Config.PlaneTrackingMode.HORIZONTAL_AND_VERTICAL,)when(valresult=session.configure(newConfig)){isSessionConfigureConfigurationNotSupported->
TODO(/* Some combinations of configurations are not valid. Handle this failure case. */)isSessionConfigureSuccess->TODO(/* Success! */)else->
TODO(/* A different unhandled exception was thrown. */)}
ARCore untuk Jetpack XR menyediakan status bidang melalui
StateFlow yang memancarkan status bidang. Berlangganan ke
pesawat dalam sesi akan memberi tahu aplikasi Anda saat pesawat ditambahkan, diperbarui, atau
dihapus.
Plane.subscribe(session).collect{planes->
// Planes have changed; update plane rendering}
extents: Dimensi bidang yang terdeteksi, dalam meter.
vertices: Daftar verteks poligon cembung yang mendekati bidang.
Melakukan hit-test terhadap bidang
Hit test adalah metode untuk menghitung persimpangan sinar dengan objek yang dilacak oleh sesi. Aplikasi umum dari uji hit adalah mengarahkan ke
meja dan menempatkan objek di lokasi tersebut. Melakukan hit-test akan menghasilkan
daftar objek yang terkena. Dengan kata lain, uji kecocokan tidak berhenti pada objek pertama yang
terkena. Namun, sering kali Anda hanya tertarik dengan hit objek pertama dari jenis tertentu.
valresults=androidx.xr.arcore.hitTest(session,ray)// When interested in the first Table hit:valtableHit=results.firstOrNull{valtrackable=it.trackabletrackableisPlane && trackable.state.value.label==Plane.Label.TABLE}
Konten dan contoh kode di halaman ini tunduk kepada lisensi yang dijelaskan dalam Lisensi Konten. Java dan OpenJDK adalah merek dagang atau merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-08-28 UTC.
[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Informasi yang saya butuhkan tidak ada","missingTheInformationINeed","thumb-down"],["Terlalu rumit/langkahnya terlalu banyak","tooComplicatedTooManySteps","thumb-down"],["Sudah usang","outOfDate","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Masalah kode / contoh","samplesCodeIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],["Terakhir diperbarui pada 2025-08-28 UTC."],[],[],null,["ARCore for Jetpack XR can detect flat surfaces in the user's environment and\nprovide information on them such as their pose, size, and orientation. This can\nhelp your app find surfaces like tables to place objects on.\n\nCreate an ARCore for Jetpack XR session\n\nAccess plane information through an ARCore for Jetpack XR session. See\n[Understand a Session's lifecycle](/develop/xr/jetpack-xr-sdk/work-with-arcore#session-lifecycle) to obtain a [`Session`](/reference/kotlin/androidx/xr/runtime/Session).\n\nConfigure the Session\n\nPlane detection is not enabled by default on XR sessions. To enable plane\ntracking, configure the session and set the\n[`PlaneTrackingMode.HORIZONTAL_AND_VERTICAL`](/reference/kotlin/androidx/xr/runtime/Config.PlaneTrackingMode#HORIZONTAL_AND_VERTICAL()) mode:\n\n\n```kotlin\nval newConfig = session.config.copy(\n planeTracking = Config.PlaneTrackingMode.HORIZONTAL_AND_VERTICAL,\n)\nwhen (val result = session.configure(newConfig)) {\n is SessionConfigureConfigurationNotSupported -\u003e\n TODO(/* Some combinations of configurations are not valid. Handle this failure case. */)\n is SessionConfigureSuccess -\u003e TODO(/* Success! */)\n else -\u003e\n TODO(/* A different unhandled exception was thrown. */)\n}https://github.com/android/snippets/blob/5673ffc60b614daf028ee936227128eb8c4f9781/xr/src/main/java/com/example/xr/arcore/Planes.kt#L30-L39\n```\n\n\u003cbr /\u003e\n\n| **Note:** Plane tracking requires the `android.permission.SCENE_UNDERSTANDING_COARSE` [runtime permission](/training/permissions/requesting) to be granted to your app.\n\nRetrieve the state of perceived planes\n\nARCore for Jetpack XR provides the state of planes through a\n[`StateFlow`](https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.flow/-state-flow/) that emits the state of planes. Subscribing to\nplanes in a session notifies your app when planes are added, updated, or\nremoved.\n\n\n```kotlin\nPlane.subscribe(session).collect { planes -\u003e\n // Planes have changed; update plane rendering\n}https://github.com/android/snippets/blob/5673ffc60b614daf028ee936227128eb8c4f9781/xr/src/main/java/com/example/xr/arcore/Planes.kt#L45-L47\n```\n\n\u003cbr /\u003e\n\nA plane has the following properties:\n\n- [`label`](/reference/kotlin/androidx/xr/arcore/Plane.State#label()): a semantic description of a given [`Plane`](/reference/kotlin/androidx/xr/arcore/Plane). Could be a [`WALL`](/reference/kotlin/androidx/xr/arcore/Plane.Label#WALL()), [`FLOOR`](/reference/kotlin/androidx/xr/arcore/Plane.Label#FLOOR()), [`CEILING`](/reference/kotlin/androidx/xr/arcore/Plane.Label#CEILING()), or [`TABLE`](/reference/kotlin/androidx/xr/arcore/Plane.Label#TABLE()).\n- [`centerPose`](/reference/kotlin/androidx/xr/arcore/Plane.State#centerPose()): The pose of the center of the detected plane.\n- [`extents`](/reference/kotlin/androidx/xr/arcore/Plane.State#extents()): The dimensions of the detected plane, in meters.\n- [`vertices`](/reference/kotlin/androidx/xr/arcore/Plane.State#vertices()): A list of vertices of a convex polygon that approximates the plane.\n\nPerform a hit-test against planes\n\nA hit-test is a method of calculating the intersection of a ray with objects\ntracked by the session. A common application of a hit-test is to point at a\ntable and place an object at that location. Conducting a hit-test results in a\nlist of hit objects. In other words, a hit-test doesn't stop at the first object\nhit. However, often you may only be interested in the first object hit of a\ngiven type.\n\nTo perform a hit-test, use [`Interaction.hitTest()`](/reference/kotlin/androidx/xr/arcore/package-summary#hittest) with a [`Ray`](/reference/kotlin/androidx/xr/runtime/math/Ray):\n\n\n```kotlin\nval results = androidx.xr.arcore.hitTest(session, ray)\n// When interested in the first Table hit:\nval tableHit = results.firstOrNull {\n val trackable = it.trackable\n trackable is Plane && trackable.state.value.label == Plane.Label.TABLE\n}https://github.com/android/snippets/blob/5673ffc60b614daf028ee936227128eb8c4f9781/xr/src/main/java/com/example/xr/arcore/Planes.kt#L55-L60\n```\n\n\u003cbr /\u003e"]]