在qt中,设置一个立方体,让其沿一条假定的路线移动,不使用qml
时间: 2024-02-18 16:00:23 浏览: 27
在 Qt 中实现一个立方体沿一条假定路径移动,可以使用 Qt 3D 模块。以下是一个使用 C++ 代码实现的示例,实现一个立方体沿着一条直线路径移动:
```cpp
#include <Qt3DCore/QEntity>
#include <Qt3DCore/QTransform>
#include <Qt3DExtras/QPhongMaterial>
#include <Qt3DExtras/QCuboidMesh>
#include <Qt3DExtras/QFirstPersonCameraController>
#include <Qt3DRender/QCamera>
#include <Qt3DRender/QSceneLoader>
#include <Qt3DRender/QPointLight>
#include <Qt3DRender/QRenderSettings>
#include <Qt3DLogic/QFrameAction>
#include <QPropertyAnimation>
#include <QVariantAnimation>
#include <QSequentialAnimationGroup>
#include <QParallelAnimationGroup>
#include <QVector3D>
#include <QVector>
#include <QUrl>
// 创建立方体模型
Qt3DCore::QEntity *createCube(Qt3DCore::QEntity *parent, const QVector3D &position, const QVector3D &scale, const QColor &color)
{
// 创建立方体
auto cube = new Qt3DCore::QEntity(parent);
auto mesh = new Qt3DExtras::QCuboidMesh(cube);
mesh->setXExtent(1);
mesh->setYExtent(1);
mesh->setZExtent(1);
// 设置立方体位置和缩放
auto transform = new Qt3DCore::QTransform(cube);
transform->setTranslation(position);
transform->setScale3D(scale);
cube->addComponent(transform);
// 设置材质
auto material = new Qt3DExtras::QPhongMaterial(cube);
material->setDiffuse(color);
cube->addComponent(material);
return cube;
}
// 创建路径模型
Qt3DCore::QEntity *createPath(Qt3DCore::QEntity *parent, const QVector<QVector3D> &points, const QColor &color)
{
// 创建路径
auto path = new Qt3DCore::QEntity(parent);
auto lineMesh = new Qt3DRender::QGeometryRenderer(path);
auto lineGeometry = new Qt3DRender::QGeometry(lineMesh);
auto lineVertices = new Qt3DRender::QBuffer(Qt3DRender::QBuffer::VertexBuffer, lineGeometry);
lineVertices->setData(QByteArray::fromRawData(reinterpret_cast<const char*>(points.constData()), points.size() * sizeof(QVector3D)));
auto lineAttributes = new Qt3DRender::QAttribute(lineGeometry);
lineAttributes->setName(Qt3DRender::QAttribute::defaultPositionAttributeName());
lineAttributes->setBuffer(lineVertices);
lineAttributes->setDataType(Qt3DRender::QAttribute::Float);
lineAttributes->setDataSize(3);
lineAttributes->setByteOffset(0);
lineAttributes->setByteStride(sizeof(QVector3D));
lineAttributes->setCount(points.size());
lineGeometry->addAttribute(lineAttributes);
lineMesh->setGeometry(lineGeometry);
lineMesh->setPrimitiveType(Qt3DRender::QGeometryRenderer::Lines);
// 设置线条颜色
auto material = new Qt3DExtras::QPhongMaterial(path);
material->setDiffuse(color);
path->addComponent(material);
path->addComponent(lineMesh);
return path;
}
int main(int argc, char *argv[])
{
// 创建应用程序和窗口
QApplication app(argc, argv);
QWidget window;
window.resize(640, 480);
window.show();
// 创建场景和相机
auto scene = new Qt3DCore::QEntity;
auto camera = new Qt3DRender::QCamera(scene);
camera->setPosition(QVector3D(0, 0, 20));
camera->setViewCenter(QVector3D(0, 0, 0));
auto cameraEntity = new Qt3DCore::QEntity(scene);
cameraEntity->addComponent(camera);
auto controller = new Qt3DExtras::QFirstPersonCameraController(cameraEntity);
controller->setCamera(camera);
// 创建光源和渲染设置
auto light = new Qt3DRender::QPointLight(scene);
light->setColor("white");
light->setIntensity(1);
auto lightEntity = new Qt3DCore::QEntity(scene);
lightEntity->addComponent(light);
auto renderSettings = new Qt3DRender::QRenderSettings(scene);
renderSettings->setActiveFrameGraph(camera);
auto frameAction = new Qt3DLogic::QFrameAction(scene);
frameAction->setTargetEntity(scene);
// 创建立方体和路径
auto cube = createCube(scene, QVector3D(0, 0, 0), QVector3D(1, 1, 1), QColor(Qt::red));
auto path = createPath(scene, { QVector3D(-5, 0, 0), QVector3D(5, 0, 0) }, QColor(Qt::blue));
// 创建动画
auto animation = new QPropertyAnimation(cube->transform(), "translation", cube);
animation->setDuration(5000); // 持续时间
animation->setLoopCount(-1); // 循环次数(-1 表示无限循环)
animation->setStartValue(path->transform()->matrix().map(path->transform()->translation())); // 起始位置
animation->setEndValue(path->transform()->matrix().map(path->transform()->translation() + QVector3D(10, 0, 0))); // 终止位置
// 启动动画
animation->start();
// 将场景添加到窗口中
auto container = QWidget::createWindowContainer(new Qt3DExtras::Qt3DWindow);
container->setMinimumSize(QSize(200, 100));
container->setMaximumSize(window.size());
container->setFocusPolicy(Qt::TabFocus);
container->setAttribute(Qt::WA_AlwaysStackOnTop);
container->setWindowFlags(Qt::SubWindow);
container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
container->show();
auto layout = new QVBoxLayout(container);
layout->addWidget(container);
window.setCentralWidget(container);
auto view = container->findChild<Qt3DExtras::Qt3DWindow *>();
view->setRootEntity(scene);
// 运行应用程序
return app.exec();
}
```
需要注意的是,这只是一个简单的示例代码,实际应用中可能需要更加复杂的逻辑和控制,具体实现方式也可能因应用场景而异。