以下代码示例演示了如何通过调用 addPolyline 方法添加折线并将其定位在 3D 空间中。如需使用此代码示例，请按照设置和向应用添加 3D 地图中的说明，设置包含基本 3D 地图的 Android Studio 项目。然后，将以下代码添加到 MainActivity.kt 文件中：
// Add imports import com.google.android.gms.maps3d.model.latLngAltitude ... // Add to the onMap3DViewReady method, after the googleMap3D object has been initialized googleMap3D.setCamera( camera { center = latLngAltitude { latitude = 40.029349 longitude = -105.300354 altitude = 1833.9 } heading = 326.0 tilt = 75.0 range = 3757.0 } ) internal val trailLocations = """ 40.0201040, -105.2976640 40.0201080, -105.2976450 40.0201640, -105.2975120 40.0202200, -105.2973740 40.0202500, -105.2972760 40.0202960, -105.2971410 40.0203080, -105.2970990 40.0203320, -105.2970070 40.0203640, -105.2969400 40.0203710, -105.2969250 40.0203770, -105.2969220 40.0203910, -105.2969130 40.0203940, -105.2969120 40.0204200, -105.2969130 40.0204630, -105.2968910 40.0205270, -105.2968280 40.0206030, -105.2967570 40.0206590, -105.2966100 40.0206990, -105.2964870 """.trimIndent().split("\n").map { val (lat, lng) = it.split(",") latLngAltitude { latitude = lat.toDouble() longitude = lng.toDouble() altitude = 0.0 // The trail will be clamped to the ground } } val trailPolylineOptions = polylineOptions { coordinates = trailLocations strokeColor = Color.RED strokeWidth = 7.0 altitudeMode = AltitudeMode.CLAMP_TO_GROUND zIndex = 5 drawsOccludedSegments = true } googleMap3D.addPolyline(trailPolylineOptions)