| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB). |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt3D module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:BSD$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
| ** |
| ** "Redistribution and use in source and binary forms, with or without |
| ** modification, are permitted provided that the following conditions are |
| ** met: |
| ** * Redistributions of source code must retain the above copyright |
| ** notice, this list of conditions and the following disclaimer. |
| ** * Redistributions in binary form must reproduce the above copyright |
| ** notice, this list of conditions and the following disclaimer in |
| ** the documentation and/or other materials provided with the |
| ** distribution. |
| ** * Neither the name of The Qt Company Ltd nor the names of its |
| ** contributors may be used to endorse or promote products derived |
| ** from this software without specific prior written permission. |
| ** |
| ** |
| ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include <QFileDialog> |
| #include <QApplication> |
| |
| #include <Qt3DRender/QCamera> |
| #include <Qt3DCore/QEntity> |
| #include <Qt3DCore/QAspectEngine> |
| #include <Qt3DInput/QInputAspect> |
| #include <Qt3DRender/QSceneLoader> |
| #include <Qt3DRender/QRenderAspect> |
| #include <Qt3DExtras/QForwardRenderer> |
| #include <Qt3DExtras/qt3dwindow.h> |
| #include <Qt3DExtras/qfirstpersoncameracontroller.h> |
| |
| class SceneWalker : public QObject |
| { |
| public: |
| SceneWalker(Qt3DRender::QSceneLoader *loader) : m_loader(loader) { } |
| |
| void onStatusChanged(); |
| |
| private: |
| void walkEntity(Qt3DCore::QEntity *e, int depth = 0); |
| |
| Qt3DRender::QSceneLoader *m_loader; |
| }; |
| |
| 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(); |
| } |
| |
| void SceneWalker::walkEntity(Qt3DCore::QEntity *e, int depth) |
| { |
| Qt3DCore::QNodeVector nodes = e->childNodes(); |
| for (int i = 0; i < nodes.count(); ++i) { |
| Qt3DCore::QNode *node = nodes[i]; |
| Qt3DCore::QEntity *entity = qobject_cast<Qt3DCore::QEntity *>(node); |
| if (entity) { |
| QString indent; |
| indent.fill(' ', depth * 2); |
| qDebug().noquote() << indent << "Entity:" << entity << "Components:" << entity->components(); |
| walkEntity(entity, depth + 1); |
| } |
| } |
| } |
| |
| 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(); |
| } |