Is it possible to embbed a 3dscene in qml Pane (Qt.QuickControl) type?

ItzMeJP

I am programming a graphical interface that I need to include a small 3DWindow inside a Pane type from Qt QuickControl.

Thus, I did the follwoing:

import QtQuick 2.4
import QtQuick.Controls 2.15
import Qt3D.Core 2.0
import Qt3D.Render 2.0
import Qt3D.Input 2.0
import Qt3D.Extras 2.0
import QtQuick.Scene3D 2.0

Page {

    property alias _width_param: home_page.width
    property alias _height_param: home_page.height

    id: home_page
    title: "Home"
    transformOrigin: Item.Center

    header: Label {
        id: title_label
        text: home_page.title
        horizontalAlignment: Text.AlignLeft
        verticalAlignment: Text.AlignVCenter
        font.weight: Font.Normal
    }

    Scene3D {
        id: scene3d

        anchors.fill: parent
        focus: true
        cameraAspectRatioMode: Scene3D.AutomaticAspectRatio
        aspects: ["input", "logic"]

         MyViewer {
             id: my
             aspectRatio: home_page.width / home_page.height
         }
    }
}

which MyViewer is defined in MyViewer.qml


import QtQuick 2.4
import Qt3D.Core 2.0
import Qt3D.Render 2.0
import Qt3D.Input 2.0
import Qt3D.Extras 2.0
import QtQuick.Scene3D 2.0
import QtQuick.Controls 2.15

Entity {
    id: entity_root

    property alias aspectRatio: mainCamera.aspectRatio

    // Render from the mainCamera
    components: [
        RenderSettings {
            activeFrameGraph: ForwardRenderer {
                id: renderer
                camera: mainCamera
            }
        },
        // Event Source will be set by the Qt3DQuickWindow
        InputSettings { }
    ]

    Camera {
        id: mainCamera

        projectionType: CameraLens.PerspectiveProjection
        fieldOfView: 22.5
        //aspectRatio: _window.width / _window.height
        nearPlane:   0.01
        farPlane:    1000.0
        viewCenter: Qt.vector3d( 0.0, 0.0, 0.0 )
        upVector:   Qt.vector3d( 0.0, 1.0, 0.0 )
    }

    FirstPersonCameraController { camera: mainCamera }

    PhongMaterial {
        id: material
    }

    Mesh{
        id:objMesh
        //source:"obj.ply"
        source:"file://home/joaopedro/qt_ws/qml3DExample/obj.ply"
    }

    Transform {
        id: objTransform
        scale3D: Qt.vector3d(10, 10, 10)
        rotation: fromAxisAndAngle(Qt.vector3d(1, 0, 0), 45)
    }

    Entity {
        id: objEntity
        components: [ objMesh, material, objTransform ]
    }
}

However the 3DScene is not plotting anything. Anyone can help me with that?

kshegunov

@ItzMeJP said in Is it possible to embbed a 3dscene in qml Pane (Qt.QuickControl) type?:

However the 3DScene is not plotting anything. Anyone can help me with that?

You haven't set the root entity of the scene.

Scene3D  {
    ...
    entity: MyViewer  {
        ...
    }
}

should do it.

ItzMeJP

@kshegunov said in Is it possible to embbed a 3dscene in qml Pane (Qt.QuickControl) type?:

entity:

thank you, but it still crash my application. Is there any problem regarding my main.cpp code?

#include <QGuiApplication>
#include <QQmlApplicationEngine>

int main(int argc, char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif

    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine;
    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);
    engine.load(url);

    return app.exec();
}

kshegunov

@ItzMeJP said in Is it possible to embbed a 3dscene in qml Pane (Qt.QuickControl) type?:

thank you, but it still crash my application.

What crash? You never said anything about a crash ...

Is there any problem regarding my main.cpp code?

Not that I can see.