How to rotate a 3D shape?

Joaquin M. Parrilla

Hello dev community!, I'm new in Qt and I'm glad to part of this community.

I've been investigating how to rotate a basic shape from their origin axis by using the mouse drag event.

I've been studying the Qt documentation and found for the mouse events the following methods:

void QGraphicsItem::mouseMoveEvent(QGraphicsSceneMouseEvent * event)
void QGraphicsItem::mousePressEvent(QGraphicsSceneMouseEvent * event)

On the other hand, I also these methods for rotating the shapes:

void QGraphicsItem::setTransformOriginPoint(const QPointF & origin)

I've been trying to rotate a basic cuboidmesh unsuccessfully.

Thanks and grettings!

kshegunov

Hi,
I don't follow, the graphics view framework deals with 2D images, how does a mesh factor into it?

Joaquin M. Parrilla

Hi,

You're right kshegunov, it seems that 'QGraphicsItem' api is more focused on 2D rendering scenes.

At the moment I used a 'QOrbitCameraController' type to get an orbital rotation from the shape around the scene:

Qt3DExtras::QOrbitCameraController *orbitCamController = new Qt3DExtras::QOrbitCameraController(rootEntity);

orbitCamController->setCamera(cameraEntity);

I'll investigating to try get the right rotation.

Greetings!

kshegunov

@Joaquin-M.-Parrilla said in How to rotate a 3D shape?:

more focused

exclusively so.

At the moment I used a 'QOrbitCameraController'

This is a different module entirely. Take a look at Qt3DCore::QTransform for a transformation component (you attach it to your entity exactly as you do for QMesh).

Joaquin M. Parrilla

I'm going to check out right now!!

Thanks for helping!!