如何使用Qt3D设置多个视口而不必使用QML
如何使用Qt3D设置多个视口而不必使用QML
提问于 2018-06-07 04:28:09
我想设置一个类似于https://doc.qt.io/archives/qt-5.10/qt3d-multiviewport-example.html的多视图端口场景，而不必使用QML。
目前，我有一个单独的视图在使用：
Qt3DExtras::Qt3DWindow* createView ( Qt3DCore::QEntity* rootEntity ) {
Qt3DExtras::Qt3DWindow* view = new Qt3DExtras::Qt3DWindow();
Qt3DRender::QCamera* camera = view->camera();
camera->lens()->setPerspectiveProjection ( 45.0f, 16.0f / 9.0f, 0.1f, 1000.0f );
camera->setPosition ( QVector3D ( 0, 0, 10.0f ) );
camera->setViewCenter ( QVector3D ( 0, 0, 0 ) );
Qt3DExtras::QOrbitCameraController* manipulator = new Qt3DExtras::QOrbitCameraController ( rootEntity );
manipulator->setLinearSpeed ( 5.0f );
manipulator->setLookSpeed ( 180.f );
manipulator->setZoomInLimit ( 5.0f );
manipulator->setCamera ( camera );
return view;
}本质上，问题是如何将示例中提供的QML代码转换为C++。
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-06-07 05:22:04
必须使用QViewport类和setNormalizedRect函数在0.0、0.0、1.0、1.0中指定。
类似于下面的内容。
//DECLARE A FRAME GRAPH
Qt3DRender::QFrameGraph *frameGraph = new Qt3DRender::QFrameGraph();
Qt3DRender::QTechniqueFilter *techniqueFilter = new Qt3DRender::QTechniqueFilter();
Qt3DRender::QViewport *viewport1 = new Qt3DRender::QViewport(techniqueFilter);
Qt3DRender::QViewport *viewport2 = new Qt3DRender::QViewport(techniqueFilter);
Qt3DRender::QViewport *viewport3 = new Qt3DRender::QViewport(techniqueFilter);
Qt3DRender::QViewport *viewport4 = new Qt3DRender::QViewport(techniqueFilter);
viewport1->setNormalizedRect(QRectF(0, 0, 0.5, 0.5));
viewport2->setNormalizedRect(QRectF(0.5, 0, 0.5, 0.5));
viewport3->setNormalizedRect(QRectF(0, 0.5, 0.5, 0.5));
viewport4->setNormalizedRect(QRectF(0.5, 0.5, 0.5, 0.5));
//SET ACTIVE FRAME GRAPH NODE TO YOUR WINDOW
your_qt3d_wndObject->setActiveFrameGraph(frameGraph->activeFrameGraph());https://doc-snapshots.qt.io/qt5-5.9/qt3drender-qviewport.html
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原文链接：
https://stackoverflow.com/questions/50729052
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