import Qt3D.Core 2.0import Qt3D.Render 2.0import Qt3D.Input 2.0import Qt3D.Extras 2.0import QtQuick 2.0import QtQuick.Scene3D 2.0Item {    width: 800    height: 600    Scene3D{        anchors.fill: parent        Entity {            id: sceneRoot            Camera {                id: camera                projectionType: CameraLens.PerspectiveProjection                fieldOfView: 450                aspectRatio: 16/9                nearPlane : 0.1                farPlane : 1000.0                position: Qt.vector3d( 10.0,0.0, 0.0 )                upVector: Qt.vector3d( 0.0, 1.0, 0.0 )                viewCenter: Qt.vector3d( 0.0, 0.0, 0.0 )            }            FirstPersonCameraController { camera: camera }            components: [                RenderSettings{                    activeFrameGraph: ForwardRenderer{                        clearColor: Qt.rgba(0,0.5,1,1);                        camera: camera                    }                },                InputSettings{}            ]            Mesh {                   id: mesh                   source: "qrc:/new/prefix1/glTF/untitled.obj"               }            Transform{                id:torTransform                scale3D:Qt.vector3d(1.5,1,0.5)                rotation:fromAxisAndAngle(Qt.vector3d(0,1,0),1)                property real hAngle:0.0                NumberAnimation on hAngle{                    from:0                    to:360.0                    duration: 10000                    loops: Animation.Infinite                }                matrix:{                    var m=Qt.matrix4x4();                    m.rotate(hAngle,Qt.vector3d(0,1,0));                    m.translate(Qt.vector3d(0,0,0));                    return m;                }            }               PhongAlphaMaterial {                   id: material                   ambient: "gray"                   alpha: 1.0               }               Entity {                   id: entity                   components: [mesh, material,torTransform]               }        }    }}