Loading OBJ Files from Resource

webzoid

I have a QWidgets application which loads an OBJ file from a resource into a Qt3DRender::QMesh instance.

When running the application via QtCreator in debug and release mode, the OBJ mesh is displayed correctly in my QWidget (via the Qt3DExtras::Qt3DWindow).

However, if I run the application in its installation directory on a local machine (i.e. C:\Program Files\MyApp\MyApp.exe) then the OBJ files are not loaded and the QWidget is empty.

I've ensured that all the relevant resource-related files are part of the installation image and I've also copied across the OBJ files to the installation dir. Unfortunately none of this solves the issue.

What could I be missing?

For reference, the code for creating and loading the 3D stuff is as follows:

// Create the view
m_view = new Qt3DExtras::Qt3DWindow();
m_view->defaultFrameGraph()->setClearColor(bg);

// Create the container widget
m_container = QWidget::createWindowContainer(m_view);

// Add the container to the layout
this->layout()->addWidget(m_container);

// Create a root entity
m_root = new Qt3DCore::QEntity;

// Update scene camera
m_camera = m_view->camera();
m_camera->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);
m_camera->setPosition(QVector3D(0, 0, 8.0f));
m_camera->setUpVector(QVector3D(0, 1, 0));
m_camera->setViewCenter(QVector3D(0, 0, 0));

// Set up the scene lighting
m_light = new Qt3DCore::QEntity(m_root);

m_point = new Qt3DRender::QPointLight(m_light);
m_point->setColor("silver");
m_point->setIntensity(1);
m_light->addComponent(m_point);
m_lightTransform = new Qt3DCore::QTransform(m_light);
m_lightTransform->setTranslation(m_camera->position());
m_light->addComponent(m_lightTransform);

m_model = new Qt3DCore::QEntity(m_root);
m_mesh = new Qt3DRender::QMesh();
m_mesh->setSource(QUrl("qrc:/Resources/Models/MyModel.obj"));

m_material = new Qt3DExtras::QPhongMaterial;
m_material->setDiffuse(QColor(Qt::darkGray));

m_transform = new Qt3DCore::QTransform;
m_transform->setScale(1.0);
m_transform->setRotation(QQuaternion::fromEulerAngles(0.0, 0.0, 0.0));

m_model->addComponent(m_mesh);
m_model->addComponent(m_transform);
m_model->addComponent(m_material);

m_view->setRootEntity(m_root);

VRonin

@webzoid said in Loading OBJ Files from Resource:

C:\Program Files\MyApp\MyApp.exe

I guess you are on windows. did you use windeployqt.exe to build your installation folder?

webzoid

@VRonin Indeed, I did.

SGaist

Hi,

You might be missing the Qt3DAnimation .dll. There's a patch in review for windeployqt for that.

webzoid

@SGaist Unfortunately this doesn't solve the issue.

SGaist

Do you have the geometryloaders, renderplugins and sceneparsers plugins deployed ?

webzoid

@SGaist I had the renderplugins and sceneparsers but not the geometryloaders.

Having now copied across the relevant files into a geometryloaders directory, this now works perfectly.

Thank you!