void initializeScene()
{
SceneWindow *window = new SceneWindow();
//QWidget *container = QWidget::createWindowContainer(window);
Qt3DCore::QAspectEngine engine;
Qt3DInput::QInputAspect *inputAspect = new Qt3DInput::QInputAspect();
engine.registerAspect(new Qt3DRender::QRenderAspect());
engine.registerAspect(inputAspect);
QVariantMap data;
data.insert(QStringLiteral("surface"), QVariant::fromValue(static_cast<QSurface *>(window)));
data.insert(QStringLiteral("eventSource"), QVariant::fromValue(window));
engine.setData(data);
// root entity
Qt3DCore::QEntity *sceneRoot = new Qt3DCore::QEntity();
// camera scene
Qt3DCore::QCamera *camera = new Qt3DCore::QCamera(sceneRoot);
camera->setFieldOfView(25);
camera->setNearPlane(1);
camera->setFarPlane(1000);
camera->setViewCenter(QVector3D(0, 3, 0));
inputAspect->setCamera(camera);
Qt3DRender::QFrameGraph *frameGraphComponent = new Qt3DRender::QFrameGraph(sceneRoot);
Qt3DRender::QForwardRenderer *forwardRenderer = new Qt3DRender::QForwardRenderer();
forwardRenderer->setCamera(camera);
forwardRenderer->setClearColor(Qt::blue);
frameGraphComponent->setActiveFrameGraph(forwardRenderer);
sceneRoot->addComponent(frameGraphComponent);
// scene loader
Qt3DCore::QEntity *sceneLoaderEntity = new Qt3DCore::QEntity(sceneRoot);
Qt3DRender::QSceneLoader *sceneLoader = new Qt3DRender::QSceneLoader(sceneLoaderEntity);
SceneHandler sceneHandler(sceneLoader);
QObject::connect(sceneLoader, &Qt3DRender::QSceneLoader::statusChanged, &sceneHandler, &SceneHandler::onStatusChanged);
sceneLoaderEntity->addComponent(sceneLoader);
QUrl fileName;
fileName = QUrl::fromLocalFile("file:://C:/Users/jacobmosehansen/Desktop/IKT/20mm_hollow_cube.stl");
sceneLoader->setSource(fileName);
engine.setRootEntity(sceneRoot);
}
int main(int ac, char **av)
{
QApplication app(ac, av);
Qt3DExtras::Qt3DWindow view;
view.defaultFrameGraph()->setClearColor(Qt::black);
// Root entity
Qt3DCore::QEntity *sceneRoot = new Qt3DCore::QEntity();
// Scene Camera
Qt3DRender::QCamera *camera = view.camera();
camera->setProjectionType(Qt3DRender::QCameraLens::PerspectiveProjection);
camera->setViewCenter(QVector3D(0.0f, 3.5f, 0.0f));
camera->setPosition(QVector3D(0.0f, 3.5f, 25.0f));
camera->setNearPlane(0.001f);
camera->setFarPlane(10000.0f);
// For camera controls
Qt3DExtras::QFirstPersonCameraController *camController = new Qt3DExtras::QFirstPersonCameraController(sceneRoot);
camController->setCamera(camera);
// Scene loader
Qt3DCore::QEntity *sceneLoaderEntity = new Qt3DCore::QEntity(sceneRoot);
Qt3DRender::QSceneLoader *sceneLoader = new Qt3DRender::QSceneLoader(sceneLoaderEntity);
SceneWalker sceneWalker(sceneLoader);
QObject::connect(sceneLoader, &Qt3DRender::QSceneLoader::statusChanged, &sceneWalker, &SceneWalker::onStatusChanged);
sceneLoaderEntity->addComponent(sceneLoader);
QStringList args = QCoreApplication::arguments();
QUrl sourceFileName;
if (args.count() <= 1) {
QWidget *container = new QWidget();
QFileDialog dialog;
dialog.setFileMode(QFileDialog::AnyFile);
sourceFileName = dialog.getOpenFileUrl(container, QStringLiteral("Open a scene file"));
} else {
sourceFileName = QUrl::fromLocalFile(args[1]);
}
if (sourceFileName.isEmpty())
return 0;
sceneLoader->setSource(sourceFileName);
view.setRootEntity(sceneRoot);
view.show();
return app.exec();
}
void SceneWalker::onStatusChanged()
{
qDebug() << "Status changed:" << m_loader->status();
if (m_loader->status() != Qt3DRender::QSceneLoader::Ready)
return;
// The QSceneLoader instance is a component of an entity. The loaded scene
// tree is added under this entity.
QVector<Qt3DCore::QEntity *> entities = m_loader->entities();
// Technically there could be multiple entities referencing the scene loader
// but sharing is discouraged, and in our case there will be one anyhow.
if (entities.isEmpty())
return;
Qt3DCore::QEntity *root = entities[0];
// Print the tree.
walkEntity(root);
// To access a given node (like a named mesh in the scene), use QObject::findChild().
// The scene structure and names always depend on the asset.
Qt3DCore::QEntity *e = root->findChild<Qt3DCore::QEntity *>(QStringLiteral("PlanePropeller_mesh")); // toyplane.obj
if (e)
qDebug() << "Found propeller node" << e << "with components" << e->components();
}
Qgs3DMapScene::Qgs3DMapScene( const Qgs3DMapSettings &map, QgsAbstract3DEngine *engine )
: mMap( map )
, mEngine( engine )
{
connect( &map, &Qgs3DMapSettings::backgroundColorChanged, this, &Qgs3DMapScene::onBackgroundColorChanged );
onBackgroundColorChanged();
// TODO: strange - setting OnDemand render policy still keeps QGIS busy (Qt 5.9.0)
// actually it is more busy than with the default "Always" policy although there are no changes in the scene.
//mRenderer->renderSettings()->setRenderPolicy( Qt3DRender::QRenderSettings::OnDemand );
#if QT_VERSION >= 0x050900
// we want precise picking of terrain (also bounding volume picking does not seem to work - not sure why)
mEngine->renderSettings()->pickingSettings()->setPickMethod( Qt3DRender::QPickingSettings::TrianglePicking );
#endif
QRect viewportRect( QPoint( 0, 0 ), mEngine->size() );
// Camera
float aspectRatio = ( float )viewportRect.width() / viewportRect.height();
mEngine->camera()->lens()->setPerspectiveProjection( mMap.fieldOfView(), aspectRatio, 10.f, 10000.0f );
mFrameAction = new Qt3DLogic::QFrameAction();
connect( mFrameAction, &Qt3DLogic::QFrameAction::triggered,
this, &Qgs3DMapScene::onFrameTriggered );
addComponent( mFrameAction ); // takes ownership
// Camera controlling
mCameraController = new QgsCameraController( this ); // attaches to the scene
mCameraController->setViewport( viewportRect );
mCameraController->setCamera( mEngine->camera() );
mCameraController->resetView( 1000 );
addCameraViewCenterEntity( mEngine->camera() );
// create terrain entity
createTerrainDeferred();
connect( &map, &Qgs3DMapSettings::terrainGeneratorChanged, this, &Qgs3DMapScene::createTerrain );
connect( &map, &Qgs3DMapSettings::terrainVerticalScaleChanged, this, &Qgs3DMapScene::createTerrain );
connect( &map, &Qgs3DMapSettings::mapTileResolutionChanged, this, &Qgs3DMapScene::createTerrain );
connect( &map, &Qgs3DMapSettings::maxTerrainScreenErrorChanged, this, &Qgs3DMapScene::createTerrain );
connect( &map, &Qgs3DMapSettings::maxTerrainGroundErrorChanged, this, &Qgs3DMapScene::createTerrain );
connect( &map, &Qgs3DMapSettings::terrainShadingChanged, this, &Qgs3DMapScene::createTerrain );
connect( &map, &Qgs3DMapSettings::pointLightsChanged, this, &Qgs3DMapScene::updateLights );
connect( &map, &Qgs3DMapSettings::fieldOfViewChanged, this, &Qgs3DMapScene::updateCameraLens );
// create entities of renderers
Q_FOREACH ( const QgsAbstract3DRenderer *renderer, map.renderers() )
{
Qt3DCore::QEntity *newEntity = renderer->createEntity( map );
newEntity->setParent( this );
}
// listen to changes of layers in order to add/remove 3D renderer entities
connect( &map, &Qgs3DMapSettings::layersChanged, this, &Qgs3DMapScene::onLayersChanged );
updateLights();
#if 0
ChunkedEntity *testChunkEntity = new ChunkedEntity( AABB( -500, 0, -500, 500, 100, 500 ), 2.f, 3.f, 7, new TestChunkLoaderFactory );
testChunkEntity->setEnabled( false );
testChunkEntity->setParent( this );
chunkEntities << testChunkEntity;
#endif
connect( mCameraController, &QgsCameraController::cameraChanged, this, &Qgs3DMapScene::onCameraChanged );
connect( mCameraController, &QgsCameraController::viewportChanged, this, &Qgs3DMapScene::onCameraChanged );
#if 0
// experiments with loading of existing 3D models.
// scene loader only gets loaded only when added to a scene...
// it loads everything: geometries, materials, transforms, lights, cameras (if any)
Qt3DCore::QEntity *loaderEntity = new Qt3DCore::QEntity;
Qt3DRender::QSceneLoader *loader = new Qt3DRender::QSceneLoader;
loader->setSource( QUrl( "file:///home/martin/Downloads/LowPolyModels/tree.dae" ) );
loaderEntity->addComponent( loader );
loaderEntity->setParent( this );
// mesh loads just geometry as one geometry...
// so if there are different materials (e.g. colors) used in the model, this information is lost
Qt3DCore::QEntity *meshEntity = new Qt3DCore::QEntity;
Qt3DRender::QMesh *mesh = new Qt3DRender::QMesh;
mesh->setSource( QUrl( "file:///home/martin/Downloads/LowPolyModels/tree.obj" ) );
meshEntity->addComponent( mesh );
Qt3DExtras::QPhongMaterial *material = new Qt3DExtras::QPhongMaterial;
material->setAmbient( Qt::red );
meshEntity->addComponent( material );
Qt3DCore::QTransform *meshTransform = new Qt3DCore::QTransform;
meshTransform->setScale( 1 );
meshEntity->addComponent( meshTransform );
meshEntity->setParent( this );
#endif
if ( map.hasSkyboxEnabled() )
{
Qt3DExtras::QSkyboxEntity *skybox = new Qt3DExtras::QSkyboxEntity;
skybox->setBaseName( map.skyboxFileBase() );
skybox->setExtension( map.skyboxFileExtension() );
skybox->setParent( this );
// docs say frustum culling must be disabled for skybox.
// it _somehow_ works even when frustum culling is enabled with some camera positions,
// but then when zoomed in more it would disappear - so let's keep frustum culling disabled
mEngine->setFrustumCullingEnabled( false );
}
// force initial update of chunked entities
onCameraChanged();
}
