How should I set up FirstPersonCameraController?

[Anton1978]

Good day. Now it's definitely a matter of
my inability to FirstPersonCameraController.
As I understand it, it must be attached to some object.
Everything seems to have been done correctly, but there is no reaction to the mouse and keyboard.

import QtQuick 2.15
import QtQuick.Window 2.14
import QtQuick3D 1.15
import QtQuick.Scene3D 2.0

Window {
    width: 800
    height: 600
    visible: true
    title: qsTr("Hello World 3D")

    Scene3D {
        anchors.fill: parent
        anchors.bottomMargin: 50.0
        anchors.rightMargin: 50.0
        Mega3DScene {}
    }
}

Or maybe the whole scene just moves with him?
I'm confused.
Mega3DScene.qml file:

import QtQuick 2.15
import Qt3D.Core 2.0
import Qt3D.Extras 2.15
import Qt3D.Input 2.0
import Qt3D.Render 2.0
import Qt3D.Logic 2.0
import QtQuick.Window 2.14


Entity {
    id: rootEtity

    SkyboxEntity {
        baseName: "qrc:/Items/Item/skybox"
        extension: ".tga"
    }

    Entity{
        TorusMesh {
            id: torusMesh
            radius: 15.0
            minorRadius: 6.0
            slices: 16
            rings: 32
        }
        PhongMaterial{
            id: torusMaterial
            diffuse: Qt.rgba(0,0,1,0)
            ambient: Qt.rgba(0.15,0,0,1)
        }
        Transform {
            id: torusTransform
            translation: Qt.vector3d(0.0,0.0,0.0)
            SequentialAnimation on rotationY {
                loops: Animation.Infinite
                NumberAnimation {
                    duration: 3000
                    to: -360
                    from: 0
                    easing.type:Easing.InQuad
                }
            }
        }
        id: torusEntity
        components: [torusMesh,torusMaterial,torusTransform]
    }

    Entity{
        PointLight{
            id: pointLight01
            color: Qt.rgba(1,0.5,0.5,0)
        }
        Transform{
            id: lightTransform01
            translation: Qt.vector3d(0.0,0.0,30.0)
        }
        id: pintLightEntity01
        components: [pointLight01,lightTransform01]
    }

    Entity{
        id: pintLightEntity
        PointLight{
            id: pointLight02
            color: Qt.rgba(1,0.5,0.5,0)
        }
        Transform{
            id: lightTransform02
            translation: Qt.vector3d(0.0,0.0,-30.0)
        }
        components: [pointLight02,lightTransform02]
    }

    Entity{
        SceneLoader{
            id: sceneLoader01
            source: "qrc:/Items/Item/teaPort.obj"
        }
        Transform{
            id: lightTransform03
            translation: Qt.vector3d(0.0,-5.0,-30.0)
            scale: 0.3
        }
        components: [sceneLoader01,lightTransform03]
    }

    Entity{
        SceneLoader{
            id: sceneLoader02
            source: "qrc:/Items/Item/text.obj"
        }
        Transform{
            id: lightTransform04
            translation: Qt.vector3d(0.0,-5.0,30.0)
            scale: 0.3
        }
        
        
        components: [sceneLoader02,lightTransform04]
    }

    Camera {
        id: mainCamera
        projectionType: CameraLens.PerspectiveProjection
        fieldOfView: 60.0
        aspectRatio: 16.0 / 9.0
        nearPlane: 0.1
        farPlane: 1000.0
        position: Qt.vector3d(0.0,0.0,50.0)
        upVector: Qt.vector3d(0.0,1.0,0.0)
        viewCenter: Qt.vector3d(0.0,0.0,0.0)
    }

    FirstPersonCameraController{
        id: controllerFirst
        camera: mainCamera
    }

    components: [
        RenderSettings {
            activeFrameGraph: ForwardRenderer{
                clearColor: Qt.rgba(1,1,1,1)
                camera: mainCamera
            }
        },
        InputSettings{}
    ]
}

[Anton1978]

Everything is working. In short, I was sure that if I clicked on Scene3D with the mouse, it was immediately in focus.
It turns out that something is wrong, you need to give its focus programmatically.

        Scene3D {
            id: scene3d
            anchors.fill: parent
            anchors.leftMargin: 200
            anchors.topMargin: 10
            anchors.rightMargin: 10
            anchors.bottomMargin: 10
            focus: true
            aspects: ["input", "logic"]
            cameraAspectRatioMode: Scene3D.AutomaticAspectRatio

            Mega3DScene{}
        }