Ubuntu 18.04.1 operating system, QT version 5.12 After starting the program that shows the 3D window, the console is written the following warning: QStandardPaths: XDG_RUNTIME_DIR not set, defaul...

my Problem: i load a 3D-Model into a QMesh: Qt3DRender::QMesh *mesh; mesh->setSource(QUrl(QStringLiteral("qrc:/new/prefix1/ata.obj"))); This works at the moment. Now I search a function that...

I'm using the new Qt 3D API to display a 3D scene during a computationally intense calculation. This scene only changes as a response to user input. However, the default behavior of Qt 3D seems to ...

Qt3D documentation is increasing but still lacking some information especially on how to do things without Qml/QtQuick. After heavily searching the web about rendering a mesh in wireframe mode, I f...

I am trying to use layer filtering as shown in this answer. For this I wrote a simple test (see below). This is a continuation of the question. At a certain position of the red sphere, an artifact...

I am trying to setup a Qt3DWindow with multiple viewports using C++. According to the documentation and the provided QML example, all I need to do is create a framegraph, where a main QViewport obj...

I'm diving into Qt3D framework and have decided to replicate a simplified version of this c++ example Unfortunately, I don't see a torus mesh on application start. I've created all required entiti...

I have a Scene3D where I dynamically add an entity which has an ObjectPicker, via this helper class' Scene3DViewHelper::addCuboid() slot: scene3dviewhelper.h: #ifndef SCENE3DVIEWHELPER_H #define SC...

I am trying to use layer filtering as shown in this answer. For this I wrote a simple test (see below). if I transfer code from a My3DWindow class to a main.cpp - this code is worked. Where is the ...

I have a function that draws triangles through OpenGL I draw two triangles by pressing a button (function on_drawMapPushButton_clicked()). Then i draw a sphere that placed above these triangles....

I feel like this should be pretty straightforward, but for my life I can't figure out how to draw a basic line using Qt 3D. The only guidance I've been able to find on the subject is this obscure v...

I am trying to create a customizable Qt3D component by merging three ConeMeshes into a single entity. The user must be able to interact with the custom entity, so I have added an ObjectPicker to th...

How can I draw the outline of an object on top of any other object in Qt3D? For instance to highlight a selected object in a 3D editor?

I create a Qt3D mesh like this: Qt3DCore::QEntity *newEntity = new Qt3DCore::QEntity(); Qt3DExtras::QConeMesh *mesh =new Qt3DExtras::QConeMesh(); mesh->setTopRadius(0.2); mesh->setBottomRadi...

On Qt3D, an entity can have these two components: Qt3DRender::QGeometryRenderer component which contains the mesh geometry data like vertex positions and normals. Qt3DCore::QTransform component w...

It seems to me that Qt3D cannot render 2D meshes well. To see what I mean open the shadow map QML example and change the camera controller from FirstPersonCameraController to OrbitCameraController....

I want to get mouse events (like mouse position) on a Qt3D Window, every time I click inside the window. I've seen this question (also the same question on this forum) but my Qt3DWindow is not ins...

Is it possible to do handle mouse input in qt3d in c++? I am able to do so using qml using a sample in the qt3d repo https://github.com/qtproject/qt3d/tree/5.6/examples/qt3d/mouseinput-qml There ...

I want to not draw some objects on the scene. In normal OpenGL we have just to not call function related to drawing the mesh. Unfortunately I didn't found this "functionality" in the QML. The Enti...

I enjoy using Qt3D, but all of the examples I see for it are full window applications. What I can't understand from the examples is how to add a qt3d rendering window to a regular qt gui applicatio...

My task: Calculate the pixel coordinates (e.g. make a snapshot) of a 3D mesh to find the 2D shape of this mesh from a specific camera angle. I'm currently using Qt3D with a QGeometryRenderer to re...

I am looking for the best way to create a billboard in Qt3D. I would like a plane which faces the camera wherever it is and does not change sized when the camera dollies forward or back. I have rea...

I am developing an application using Qt3D and need to access raw vertex data via C++. I am using the QObjectPicker for raypointing, but since the data is specialized (I have developed an importer t...

I am writing an application using Qt3D. Most of the 3D handling I have been doing has used QML not the C++ interface. I have created a QML effect that loads my shader programs similar to the PerVer...

In my open source project I have setup a deferred rendering pipeline using Qt3D. So far so good, but now I'd like to move forward by adding spotlights projection volume. (e.g. as if there is smoke ...