import QtQuick 2.15 import QtQuick.Window 2.14 import QtQuick3D 1.15 Item { id:sunLight width:1080 height:720 property real animationValue: 0.0 Timer { id:timer interval: 16 repeat: true running:true onTriggered: { animationValue += 0.5 } } View3D { id:view3D anchors.fill: parent environment: sceneEnvironment SceneEnvironment{ id:sceneEnvironment antialiasingQuality: SceneEnvironment.High antialiasingMode: SceneEnvironment.MSAA } Node { id:node DirectionalLight{ id:directionalLight } PerspectiveCamera{ id:camera z:15 } Model { id:cubeModel source: "qrc:/meshs/torus_Knot.mesh" materials: cubeMaterial Rotation{ angle:animationValue } DefaultMaterial { id: cubeMaterial objectName: "cubeMaterial" diffuseColor: "#4aee45" } } } } } 这段代码应该怎么更改，让模型能够旋转起来

要让模型旋转起来，你可以在 `Rotation` 组件中使用属性绑定，将 `angle` 绑定到 `animationValue` 属性上。以下是更改后的代码：

Item {
    id: sunLight
    width: 1080
    height: 720

    property real animationValue: 0.0

    Timer {
        id: timer
        interval: 16
        repeat: true
        running: true
        onTriggered: {
            animationValue += 0.5
        }
    }

    View3D {
        id: view3D
        anchors.fill: parent
        environment: sceneEnvironment
        SceneEnvironment {
            id: sceneEnvironment
            antialiasingQuality: SceneEnvironment.High
            antialiasingMode: SceneEnvironment.MSAA
        }
        Node {
            id: node
            DirectionalLight {
                id: directionalLight
            }
            PerspectiveCamera {
                id: camera
                z: 15
            }
            Model {
                id: cubeModel
                source: "qrc:/meshs/torus_Knot.mesh"
                materials: cubeMaterial
                Rotation {
                    angle: animationValue
                }
                DefaultMaterial {
                    id: cubeMaterial
                    objectName: "cubeMaterial"
                    diffuseColor: "#4aee45"
                }
            }
        }
    }
}

现在，每次 `timer` 触发时，`animationValue` 的值都会增加 0.5，然后通过属性绑定，将其传递给模型的 `Rotation` 组件的 `angle` 属性，从而实现模型的旋转。