qt3d/examples/cylinder-cpp/main.cpp

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#include <QGuiApplication>

#include <Qt3DCore/window.h>
#include <Qt3DCore/qcamera.h>
#include <Qt3DCore/qentity.h>
#include <Qt3DCore/qcameralens.h>

#include <Qt3DRenderer/qcylindermesh.h>
#include <Qt3DRenderer/qmesh.h>
#include <Qt3DRenderer/qtechnique.h>
#include <Qt3DRenderer/qmaterial.h>
#include <Qt3DRenderer/qeffect.h>
#include <Qt3DRenderer/qtexture.h>
#include <Qt3DRenderer/qrenderpass.h>

#include <Qt3DCore/qscaletransform.h>
#include <Qt3DCore/qrotatetransform.h>
#include <Qt3DCore/qlookattransform.h>
#include <Qt3DCore/qtransform.h>

#include <Qt3DRenderer/qcameraselector.h>
#include <Qt3DRenderer/qrenderpassfilter.h>
#include <Qt3DRenderer/qtechniquefilter.h>
#include <Qt3DRenderer/qviewport.h>
#include <Qt3DRenderer/qrenderaspect.h>
#include <Qt3DRenderer/qframegraph.h>
#include <Qt3DRenderer/qclearbuffer.h>

int main(int argc, char **argv)
{
    QGuiApplication app(argc, argv);

    Qt3D::Window view;
    view.registerAspect(new Qt3D::QRenderAspect());

    // Root entity
    Qt3D::QEntity *rootEntity = new Qt3D::QEntity();

    // Camera
    Qt3D::QCamera *cameraEntity = new Qt3D::QCamera(rootEntity);
    cameraEntity->setObjectName(QStringLiteral("cameraEntity"));

    cameraEntity->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);
    cameraEntity->setPosition(QVector3D(0, 0, -20.0f));
    cameraEntity->setUpVector(QVector3D(0, 1, 0));
    cameraEntity->setViewCenter(QVector3D(0, 0, 0));
    view.setCamera(cameraEntity);

    // FrameGraph
    Qt3D::QFrameGraph *frameGraph = new Qt3D::QFrameGraph();
    Qt3D::QTechniqueFilter *techniqueFilter = new Qt3D::QTechniqueFilter();
    Qt3D::QViewport *viewport = new Qt3D::QViewport(techniqueFilter);
    Qt3D::QClearBuffer *clearBuffer = new Qt3D::QClearBuffer(viewport);
    Qt3D::QCameraSelector *cameraSelector = new Qt3D::QCameraSelector(clearBuffer);
    (void) new Qt3D::QRenderPassFilter(cameraSelector);

    // TechiqueFilter and renderPassFilter are not implement yet

    viewport->setRect(QRectF(0, 0, 1, 1));
    clearBuffer->setBuffers(Qt3D::QClearBuffer::ColorDepthBuffer);
    cameraSelector->setCamera(cameraEntity);

    frameGraph->setActiveFrameGraph(techniqueFilter);


    // Cylinder shape data
    Qt3D::QCylinderMesh *cylinder = new Qt3D::QCylinderMesh();
    cylinder->setRadius(1);
    cylinder->setLength(3);
    cylinder->setRings(100);
    cylinder->setSlices(20);

    // CylinderMesh Transform
    Qt3D::QScaleTransform *cylinderScale = new Qt3D::QScaleTransform();
    Qt3D::QRotateTransform *cylinderRotation = new Qt3D::QRotateTransform();
    Qt3D::QTransform *cylinderTransforms = new Qt3D::QTransform();

    cylinderScale->setScale3D(QVector3D(1.5f, 1.5f, 1.5f));
    cylinderRotation->setAngleDeg(45.0f);
    cylinderRotation->setAxis(QVector3D(1, 0, 0));

    cylinderTransforms->addTransform(cylinderScale);
    cylinderTransforms->addTransform(cylinderRotation);

    // Cylinder
    Qt3D::QEntity *cylinderEntity = new Qt3D::QEntity(rootEntity);
    cylinderEntity->addComponent(cylinder);
    cylinderEntity->addComponent(cylinderTransforms);

    // Setting the FrameGraph
    rootEntity->addComponent(frameGraph);

    // Set root object of the scene
    view.setRootEntity(rootEntity);
    view.show();

    return app.exec();
}