Qt Creator shows nothing for my first 3D project!

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. :)