Qt Creator shows nothing for my first 3D project!

[sierdzio]

It's strange indeed. No ideas then, sorry :-(

[qcoderpro]

@sierdzio

Can you please run that example on your Qt Creator (if you're using Windows) to see if it doesn't work for you either or works?

[sierdzio]

I'm on Linux but I tried it on a Windows 10 virtual machine (my GPU is nVidia but the VM has an emulated GPU), it compiles, runs and I can see the 3D bar chart. No crashes, no problems show up. I've tried it with Qt 6.4.3.

[qcoderpro]

@sierdzio

Thanks so much.
My Qt version seems to be the same yours

I will be very thankful if you zip that project and share it on some file sharing website (anyone you like) and I will download and scrutinize it, hopefully to know the reason why I get that problem.
Thanks in advance.

[sierdzio]

OK so that again points in the direction of OpenGL drivers... but the ones from nVidia are very stable, it would be very unusual for them to cause a crash.

[qcoderpro]

@sierdzio

Do you also create a project for that example this way?
New Project > Qt Quick Application -> CMake -> Qt 6.4 -> next -> finish
and then without modifying main.cpp or CMakeLists.txt I paste the content of that example into main.qml file:

import QtQuick
import QtDataVisualization

Item {
    width: 640
    height: 480

    Rectangle {
        x: 100; y: 100
        width: 200; height: 200
        color: "blue"
    }

    Bars3D {
        width: parent.width
        height: parent.height

        Bar3DSeries {
            itemLabelFormat: "@colLabel, @rowLabel: @valueLabel"

            ItemModelBarDataProxy {
                itemModel: dataModel
                // Mapping model roles to bar series rows, columns, and values.
                rowRole: "year"
                columnRole: "city"
                valueRole: "expenses"
            }
        }
    }

    ListModel {
        id: dataModel
        ListElement{ year: "2012"; city: "Oulu";     expenses: "4200"; }
        ListElement{ year: "2012"; city: "Rauma";    expenses: "2100"; }
        ListElement{ year: "2012"; city: "Helsinki"; expenses: "7040"; }
        ListElement{ year: "2012"; city: "Tampere";  expenses: "4330"; }
        ListElement{ year: "2013"; city: "Oulu";     expenses: "3960"; }
        ListElement{ year: "2013"; city: "Rauma";    expenses: "1990"; }
        ListElement{ year: "2013"; city: "Helsinki"; expenses: "7230"; }
        ListElement{ year: "2013"; city: "Tampere";  expenses: "4650"; }
    }
}

When I run this, Qt Creator shows nothing but in the Application Output I get the message: ninja: no work to do.

[sierdzio]

@qcoderpro said in Qt Creator shows nothing for my first 3D project!:

Do you also create a project for that example this way?
New Project > Qt Quick Application -> CMake -> Qt 6.4 -> next -> finish

No. I open the example through Examples section in Qt Creator, then configure it and run.

Welcome -> Examples -> search for that example -> Configure -> Build & Run

[qcoderpro]

@sierdzio
That's a difference.
That example doesn't exists in the Examples section! If you point to the simple bar graph one, yes, it works well for me too. But I need to somehow run the simple example mentioned here for part of my other project.

Let's focus on that simple example. How do run it in a project? Please write the steps and I also do the same and then we compare our outputs. I'm sure that way we can be sure if there's a problem with my graphic card or not.

[sierdzio]

OK when I do it your way I get a crash, too.

[sierdzio]

... and the crash is gone when I add this line as first in main():

qputenv("QSG_RHI_BACKEND", "opengl");

[qcoderpro]

@sierdzio
Even if I add that line in main.cpp the result is the same: ninja: no work to do!
Did you test it using a new QtQuick project or yet something from Examples section?

[sierdzio]

@qcoderpro said in Qt Creator shows nothing for my first 3D project!:

@sierdzio
Even if I add that line in main.cpp the result is the same: ninja: no work to do!
Did you test it using a new QtQuick project or yet something from Examples section?

Yes, a new QtQuick project.

ninja: no work to do

Maybe you forgot to save main.cpp before building?

[qcoderpro]

@sierdzio

Yes, I save it (many times press ctrl+S), yet no success!
Here's my project in a QML_2.zp file: https://www.dropbox.com/s/m7nnftx9kwic0pf/QML_2.rar?dl=0

[sierdzio]

@qcoderpro said in Qt Creator shows nothing for my first 3D project!:

@sierdzio

Yes, I save it (many times press ctrl+S), yet no success!
Here's my project in a QML_2.zp file: https://www.dropbox.com/s/m7nnftx9kwic0pf/QML_2.rar?dl=0

BEFORE QGuiApplication!

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

    qputenv("QSG_RHI_BACKEND", "opengl"); // <= WRONG!

[qcoderpro]

@sierdzio

Here's my main.cpp now:

#include <QGuiApplication>
#include <QQmlApplicationEngine>

int main(int argc, char *argv[])
{
    qputenv("QSG_RHI_BACKEND", "opengl");

    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine;
    const QUrl url(u"qrc:/QML_2/Main.qml"_qs);
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreationFailed,
        &app, []() { QCoreApplication::exit(-1); },
        Qt::QueuedConnection);
    engine.load(url);

    return app.exec();
}

Saved and ran it again. Yet nothing!

For Build -> clean (project QML_2), I get these:

Issues Window: warning: ninja: build stopped: subcommand failed.

Complie output window: Running steps for project QML_2...
Starting: "C:\Qt\Tools\CMake_64\bin\cmake.exe" --build D:/Projects/QML/QML_2/build-QML_2-Desktop_Qt_6_5_0_MinGW_64_bit-Debug --target clean
Cleaning additional files...
Cleaning all built files...
FAILED: clean
C:\Qt\Tools\Ninja\ninja.exe -t clean
Cleaning... ninja: error: remove(appQML_2.exe): Permission denied 20 files.
ninja: build stopped: subcommand failed.
The process "C:\Qt\Tools\CMake_64\bin\cmake.exe" exited with code 1.

Shouldn't I use a window instead of an Item in main,qml?

[sierdzio]

@qcoderpro said in Qt Creator shows nothing for my first 3D project!:

Cleaning... ninja: error: remove(appQML_2.exe): Permission denied 20 files.

You need to fix your permissions problem.

Shouldn't I use a window instead of an Item in main,qml?

Yes. Or put that whole Item inside a Window. Both should work fine.

[qcoderpro]

@sierdzio

Yes, using a Window instead of that Item solved the issue.

import QtQuick
import QtQuick.Window
import QtDataVisualization

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")

    Item {
        width: 640
        height: 480

        Bars3D {
// ...

I get this output:

And when I move the mouse holding the right-click button, it shows different views of that, like:

Do you get the output with the same quality?
(If possible send a screenshot of the output once you run the project, please. I just like to be sure about my graphics card performance for that project)

[sierdzio]

Here you go:

[qcoderpro]

@sierdzio
Thanks so much for your patience and help. :)