Good morning I'm Paul and I'm trying to show a mesh but it does not work, you have to put a texture on it?

Main.cpp
Qt Code: 
  1. #include <Qt3DQuickExtras/qt3dquickwindow.h>
  2. #include <Qt3DQuick/QQmlAspectEngine>
  3.  
  4. #include <QGuiApplication>
  5. #include <QtQml>
  6.  
  7. int main(int argc, char **argv)
  8. {
  9.     QGuiApplication app(argc, argv);
  10.     Qt3DExtras::Quick::Qt3DQuickWindow view;
  11.  
  12.     // Expose the window as a context property so we can set the aspect ratio
  13.     view.engine()->qmlEngine()->rootContext()->setContextProperty("_window", &view);
  14.     view.setSource(QUrl("qrc:/main.qml"));
  15.     view.setWidth(800);
  16.     view.setHeight(600);
  17.     view.show();
  18.  
  19.     return app.exec();
  20. }
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Main.qml
Qt Code: 
  1. import Qt3D.Core 2.0
  2. import Qt3D.Render 2.0
  3. import Qt3D.Input 2.0
  4. import Qt3D.Extras 2.0
  5.  
  6. Entity {
  7.     id: sceneRoot
  8.  
  9.     Camera {
  10.         id: camera
  11.         projectionType: CameraLens.PerspectiveProjection
  12.         fieldOfView: 25
  13.         aspectRatio: _window.width / _window.height
  14.         nearPlane : 0.1
  15.         farPlane : 1000.0
  16.         position: Qt.vector3d( 0, 0.0, 20.0 )
  17.         upVector: Qt.vector3d( 0.0, 1.0, 0.0 )
  18.         viewCenter: Qt.vector3d( 0.0, 0.0, 0.0 )
  19.     }
  20.  
  21.     OrbitCameraController {
  22.         camera: camera
  23.     }
  24.  
  25.     components: [
  26.         RenderSettings {
  27.             activeFrameGraph: ForwardRenderer {
  28.                 clearColor: Qt.rgba(0, 0.5, 1, 1)
  29.                 camera: camera
  30.             }
  31.         },
  32.         InputSettings { }
  33.     ]
  34.  
  35.     PhongMaterial {
  36.         id: carMaterial
  37.     }
  38.  
  39.     Mesh {
  40.         id: carMesh
  41.         source: "SferaStl.stl"
  42.     }
  43.  
  44.     Entity {
  45.         id: carEntity
  46.         components: [ carMesh, carMaterial ]
  47.     }
  48. }
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File.pro

Qt Code: 
  1. QT += 3dextras widgets 3dcore 3drender 3dinput 3dquick qml quick 3dquickextras
  2. CONFIG += c++11
  3.  
  4. # The following define makes your compiler emit warnings if you use
  5. # any feature of Qt which as been marked deprecated (the exact warnings
  6. # depend on your compiler). Please consult the documentation of the
  7. # deprecated API in order to know how to port your code away from it.
  8. DEFINES += QT_DEPRECATED_WARNINGS
  9.  
  10. # You can also make your code fail to compile if you use deprecated APIs.
  11. # In order to do so, uncomment the following line.
  12. # You can also select to disable deprecated APIs only up to a certain version of Qt.
  13. #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
  14.  
  15. SOURCES += main.cpp
  16.  
  17. RESOURCES += qml.qrc\
  18.  
  19.  
  20.  
  21. # Additional import path used to resolve QML modules in Qt Creator's code model
  22. QML_IMPORT_PATH =
  23.  
  24. # Additional import path used to resolve QML modules just for Qt Quick Designer
  25. QML_DESIGNER_IMPORT_PATH =
  26.  
  27. # Default rules for deployment.
  28. qnx: target.path = /tmp/$${TARGET}/bin
  29. else: unix:!android: target.path = /opt/$${TARGET}/bin
  30. !isEmpty(target.path): INSTALLS += target
  31.  
  32. DISTFILES += \       
  33.     main.qml \
  34.  
  35. SUBDIRS += \
  36.     untitled1.pro
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The program starts and the window appears but you do not see the mesh that is located on the root