Qt3d: Mesh fails to load when QMesh::setMeshName() is called.

j_omega

The following program to load and display at 3D mesh works fine.

#include <QGuiApplication>

#include <Qt3DCore/QEntity>
#include <Qt3DCore/QAspectEngine>
#include <Qt3DRender/QCamera>

#include <Qt3DInput/QInputAspect>

#include <Qt3DRender/QRenderAspect>
#include <Qt3DExtras/QPhongMaterial>
#include <Qt3DExtras/QDiffuseMapMaterial>
#include <Qt3DExtras/QForwardRenderer>
#include <Qt3DRender/QTextureImage>
#include <Qt3DRender/QMesh>
#include <Qt3DCore/QTransform>

#include <Qt3DExtras/qt3dwindow.h>
#include <Qt3DExtras/qfirstpersoncameracontroller.h>

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

    Qt3DExtras::Qt3DWindow view;

    // Scene Root
    Qt3DCore::QEntity *sceneRoot = new Qt3DCore::QEntity();

    // Scene Camera
    Qt3DRender::QCamera *basicCamera = view.camera();
    basicCamera->setProjectionType(Qt3DRender::QCameraLens::PerspectiveProjection);
    basicCamera->setUpVector(QVector3D(0.0f, 1.0f, 0.0f));
    basicCamera->setViewCenter(QVector3D(0.0f, 3.5f, 0.0f));
    basicCamera->setPosition(QVector3D(0.0f, 3.5f, 25.0f));
    // For camera controls
    Qt3DExtras::QFirstPersonCameraController *camController = new Qt3DExtras::QFirstPersonCameraController(sceneRoot);
    camController->setCamera(basicCamera);

    // Chest
    Qt3DCore::QEntity *chestEntity = new Qt3DCore::QEntity(sceneRoot);
	
	// Mesh
    Qt3DRender::QMesh *chestMesh = new Qt3DRender::QMesh();
    chestMesh->setSource(QUrl::fromLocalFile("../assets/Chest.obj"));
	
	// Transform
    Qt3DCore::QTransform *chestTransform = new Qt3DCore::QTransform;
    chestTransform->setScale(0.03f);

    Qt3DExtras::QDiffuseMapMaterial *diffuseMapMaterial = new Qt3DExtras::QDiffuseMapMaterial();
    diffuseMapMaterial->setSpecular(QColor::fromRgbF(0.2f, 0.2f, 0.2f, 1.0f));
    diffuseMapMaterial->setShininess(2.0f);

    Qt3DRender::QTextureImage *chestDiffuseImage = new Qt3DRender::QTextureImage();
    chestDiffuseImage->setSource(QUrl::fromLocalFile("../assets/diffuse.webp"));
    diffuseMapMaterial->diffuse()->addTextureImage(chestDiffuseImage);

    chestEntity->addComponent(chestMesh);
    chestEntity->addComponent(chestTransform);
    chestEntity->addComponent(diffuseMapMaterial);

    view.setRootEntity(sceneRoot);
    view.show();

    return app.exec();
}

However, as soon as this is added, the mesh is no longer displayed.

chestMesh->setMeshName("myMesh");

Why does this line create problems. Is this worth writing a bug report?

Important: Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

Qt3d: Mesh fails to load when QMesh::setMeshName() is called.