Choose camera controller

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Sample viewer app

Control the behavior of the camera in a scene.

screenshot

Use Case

The globe camera controller (the default camera controller in all new scenes) allows a user to explore the scene freely by zooming in/out and panning around the globe. The orbit camera controllers fix the camera to look at a target location or geoelement. A primary use case is for following moving objects like cars and planes.

How to use the sample

The application loads with the default globe camera controller. To rotate and fix the scene around the plane, exit globe mode by choosing the "Orbit camera around plane" option (i.e. camera will now be fixed to the plane). Choose the "Orbit camera around crater" option to rotate and center the scene around the location of the Upheaval Dome crater structure, or choose the "Free pan round the globe" option to return to default free navigation.

How it works

  1. Create an instance of a class extending CameraController: GlobeCameraController, OrbitLocationCameraController, OrbitGeoElementCameraController.
  2. Set the scene view's camera controller with sceneView.cameraController.

Relevant API

  • Scene
  • Camera
  • GlobeCameraController
  • OrbitGeoElementCameraController
  • OrbitLocationCameraController
  • SceneView

Tags

camera controller, Camera, SceneView, 3D

Sample Code

ChooseCameraController.qml
                                                                                                                                                                                    
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// [WriteFile Name=ChooseCameraController, Category=Scenes]
// [Legal]
// Copyright 2019 Esri.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

import QtQuick 2.6
import Esri.ArcGISRuntime 100.12
import Esri.ArcGISExtras 1.1
import QtQuick.Controls 2.2
import QtQuick.Layouts 1.1

Rectangle {
    clip: true
    width: 800
    height: 600

    readonly property url dataPath: System.userHomePath +  "/ArcGIS/Runtime/Data/3D"
    readonly property real longitude: -109.929589
    readonly property real latitude: 38.43500
    readonly property real distance: 5000

    GlobeCameraController {
        id: globeController
    }

    Point {
        id: theCrater
        x: longitude
        y: latitude
        z: distance
        spatialReference: SpatialReference { wkid: 4326 }
    }

    OrbitLocationCameraController {
        id: orbitLocationCtrlr
        targetLocation: theCrater
        cameraDistance: distance
    }

    OrbitGeoElementCameraController{
        id: orbitPlaneCtrlr
        targetGeoElement: thePlane
        cameraDistance: distance / 2
    }

    SceneView {
        id: sceneView
        anchors.fill: parent

        Scene {
            id: scene
            Basemap {
                initStyle: Enums.BasemapStyleArcGISImageryStandard
            }

            Surface {
                ArcGISTiledElevationSource {
                    url: "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer"
                }
            }
        }

        GraphicsOverlay {
            id: graphicsOverlay

            LayerSceneProperties {
                surfacePlacement: Enums.SurfacePlacementRelative
            }

            ModelSceneSymbol {
                id: mms
                url: dataPath + "/Bristol/Collada/Bristol.dae"
                scale: 10.0
                heading: 0.0
            }

            Graphic {
                id: thePlane
                symbol: mms

                geometry: Point {
                    x: longitude
                    y: latitude
                    z: distance / 2
                    spatialReference: sceneView.spatialReference
                }
            }
        }

        Component.onCompleted: {
            // set viewpoint to the specified camera
            sceneView.setViewpointCamera(camera);
        }
    }

    Camera {
        id: camera
        heading: 0.0
        pitch: 0.0
        roll: 0.0
        location: theCrater
    }

    // Create a rectangle to display the GUI
    Rectangle {
        width: childrenRect.width
        height: childrenRect.height
        color: "lightgrey"
        opacity: 0.8
        radius: 5
        anchors {
            margins: 10
            left: parent.left
            top: parent.top
        }
        border {
            color: "#4D4D4D"
            width: 1
        }

        ColumnLayout {

            Text {
                Layout.margins: 5
                Layout.fillWidth: true
                text: "Choose camera controller"
                clip: true
                font {
                    pointSize: 14
                    bold: true
                }
            }

            RadioButton {
                id: orbitAroundAeroplane
                Layout.fillWidth: true
                text: "Orbit camera around plane"
                onCheckedChanged: {
                    if (checked) {
                        sceneView.cameraController = orbitPlaneCtrlr;
                    }
                }
            }

            RadioButton {
                id: orbitLocation
                Layout.fillWidth: true
                text: "Orbit camera around crater"
                onCheckedChanged: {
                    if (checked) {
                        sceneView.cameraController = orbitLocationCtrlr;
                    }
                }
            }

            RadioButton {
                id: orbitAroundGlobe
                Layout.fillWidth: true
                checked: true
                text: "Free pan round the globe"
                onCheckedChanged: {
                    if (checked) {
                        sceneView.cameraController = globeController;
                    }
                }
            }
        }
    }
}

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