Mesh not Visible

[Nio74]

Hi all, I'm trying to make my * .stl file appear in the same directory as the project but I do not see these are my fie:

Main.cpp

#include <Qt3DQuickExtras/qt3dquickwindow.h>
#include <Qt3DQuick/QQmlAspectEngine>

#include <QGuiApplication>
#include <QtQml>

int main(int argc, char **argv)
{
    QGuiApplication app(argc, argv);
    Qt3DExtras::Quick::Qt3DQuickWindow view;

    // Expose the window as a context property so we can set the aspect ratio
    view.engine()->qmlEngine()->rootContext()->setContextProperty("_window", &view);
    view.setSource(QUrl("qrc:/main.qml"));
    view.setWidth(800);
    view.setHeight(600);
    view.show();

    return app.exec();
}

Main.qml

import Qt3D.Core 2.0
import Qt3D.Render 2.0
import Qt3D.Input 2.0
import Qt3D.Extras 2.0

Entity {
    id: sceneRoot

    Camera {
        id: camera
        projectionType: CameraLens.PerspectiveProjection
        fieldOfView: 25
        aspectRatio: _window.width / _window.height
        nearPlane : 0.1
        farPlane : 1000.0
        position: Qt.vector3d( 0, 0.0, 20.0 )
        upVector: Qt.vector3d( 0.0, 1.0, 0.0 )
        viewCenter: Qt.vector3d( 0.0, 0.0, 0.0 )
    }

    OrbitCameraController {
        camera: camera
    }

    components: [
        RenderSettings {
            activeFrameGraph: ForwardRenderer {
                clearColor: Qt.rgba(0, 0.5, 1, 1)
                camera: camera
            }
        },
        InputSettings { }
    ]

    PhongMaterial {
        id: carMaterial
    }

    Mesh {
        id: carMesh
        source: "SferaStl.stl"
    }

    Entity {
        id: carEntity
        components: [ carMesh, carMaterial ]
    }
}

this is the result:

[Nio74]

@Nio74

Is that possible because I have to apply a texture?

Help, there's no one doing things like that?

[MProstka]

I am having the exact same problem with nearly identical code as yours. The only difference is that I am loading a .PLY file. If (when!) I figure this out I will let you know immediately.

[MProstka]

Ok, I was able to get it to work in C++ but I haven't tried it with QML yet. I THINK the problem lies in the path to the object file. When I gave it the explicit path with:

m_suzanneMesh->setSource(QUrl::fromLocalFile("C:/Qt/Examples/Qt-5.10.1/qt3d/scene3d/Suzanne.ply"));

instead of

m_suzanneMesh->setSource(QUrl(QStringLiteral("qrc:/new/prefix1/Suzanne.ply")));

it magically worked. My theory is that when the model loader has a problem finding the file it doesn't report anything to that effect, it just goes ahead and displays an empty mesh.

Hope that helps!