我最近开始学习Qt/QML/C++,试图构建一个非常基本的三维场景,以使相机围绕网格对象旋转。
我发现很难跟随示例,并且发现文档没有提供任何有用的指令。似乎也没有太多教程可用,也许我正在错误的地方寻找。
main.cpp
#include <Qt3DQuickExtras/qt3dquickwindow.h>
#include <Qt3DQuick/QQmlAspectEngine>
#include <QGuiApplication>
#include <QtQml>
int main(int argc, char **argv)
{
QGuiApplication app(argc, argv);
Qt3DExtras::Quick::Qt3DQuickWindow view;
// Expose the window as a context property so we can set the aspect ratio
view.engine()->qmlEngine()->rootContext()->setContextProperty("_window", &view);
view.setSource(QUrl("qrc:/main.qml"));
view.setWidth(800);
view.setHeight(600);
view.show();
return app.exec();
}
main.qml
import Qt3D.Core 2.0
import Qt3D.Render 2.0
import Qt3D.Input 2.0
import Qt3D.Extras 2.0
Entity {
id: sceneRoot
Camera {
id: camera
projectionType: CameraLens.PerspectiveProjection
fieldOfView: 25
aspectRatio: _window.width / _window.height
nearPlane : 0.1
farPlane : 1000.0
position: Qt.vector3d( 0, 0.0, 20.0 )
upVector: Qt.vector3d( 0.0, 1.0, 0.0 )
viewCenter: Qt.vector3d( 0.0, 0.0, 0.0 )
}
OrbitCameraController {
camera: camera
}
components: [
RenderSettings {
activeFrameGraph: ForwardRenderer {
clearColor: Qt.rgba(0, 0.5, 1, 1)
camera: camera
}
},
InputSettings { }
]
PhongMaterial {
id: carMaterial
}
Mesh {
id: carMesh
source: "resources/aventador.obj"
}
Entity {
id: carEntity
components: [ carMesh, carMaterial ]
}
}
我该如何使相机围绕网格对象旋转?