[Interest] 3D World in C++ - loading objects and change properties ..

[Jens Kallup]

Hello,

the code above will display a plane and a mesh sphere.
But, how can I move it around the scene, set material
texture or color, and how can I change the position of it?

TIA

Jens

extern Qt3DExtras::Qt3DWindow *view;
dreidworld::dreidworld()
{
     Qt3DCore::QEntity *sceneRoot = new Qt3DCore::QEntity();

     // Scene Camera
     Qt3DRender::QCamera *basicCamera = view->camera();
basicCamera->setProjectionType(Qt3DRender::QCameraLens::PerspectiveProjection); 

     basicCamera->setAspectRatio(view->width() / view->height());
     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);

     // Scene floor
     My3Dplane *planeEntity = new My3Dplane(sceneRoot);
     planeEntity->mesh()->setHeight(100.0f);
     planeEntity->mesh()->setWidth(100.0f);
     planeEntity->mesh()->setMeshResolution(QSize(20, 20));

     Qt3DExtras::QNormalDiffuseSpecularMapMaterial 
*normalDiffuseSpecularMapMaterial = new 
Qt3DExtras::QNormalDiffuseSpecularMapMaterial();
     normalDiffuseSpecularMapMaterial->setTextureScale(10.0f);
     normalDiffuseSpecularMapMaterial->setShininess(80.0f);
normalDiffuseSpecularMapMaterial->setAmbient(QColor::fromRgbF(0.2f, 
0.2f, 0.2f, 1.0f));

     Qt3DRender::QTextureImage *diffuseImage = new 
Qt3DRender::QTextureImage();
diffuseImage->setSource(QUrl(QStringLiteral("qrc:/textures/diffuse.webp"))); 

normalDiffuseSpecularMapMaterial->diffuse()->addTextureImage(diffuseImage);

     Qt3DRender::QTextureImage *specularImage = new 
Qt3DRender::QTextureImage();
specularImage->setSource(QUrl(QStringLiteral("qrc:/textures/specular.webp"))); 

normalDiffuseSpecularMapMaterial->specular()->addTextureImage(specularImage); 


     Qt3DRender::QTextureImage *normalImage = new 
Qt3DRender::QTextureImage();
normalImage->setSource(QUrl((QStringLiteral("qrc:/textures/normal.webp")))); 

normalDiffuseSpecularMapMaterial->normal()->addTextureImage(normalImage);

     Qt3DRender::QMesh *logo = new Qt3DRender::QMesh(sceneRoot);
     logo->setSource(QUrl((QStringLiteral("qrc:/test.obj"))));



planeEntity->addComponent(normalDiffuseSpecularMapMaterial);
     planeEntity->addComponent(logo);


     view->setRootEntity(sceneRoot);
     view->show();
}