Hi,
while comparing the QmlMitkRenderWindowItem with the QmitkRenderWindow I
realized a small but significant difference:
mitk::Point2D QmlMitkRenderWindowItem::GetMousePosition(QMouseEvent* me)
const
{
mitk::Point2D point;
point[0] = me->x();
point[1] = me->y();
//the following line was missing in the QmlMitkRenderWindowItem
m_Renderer->GetDisplayGeometry()->ULDisplayToDisplay(point, point);
return point;
}
The missing line caused that the y coordinate was flipped.
ULDisplayToDisplay is basically flipping the y coordinate, so that 0,0
is not in the top left corner but in the bottom left corner. Now the
picking worked perfectly fine. But now the display coordinate has to be
flipped in my QML file. It works like this but I am wondering if there
is a better way to solve this. If not I would create a new bug and
attach the patch..
Best regards,
Martin
On 21.08.2014 16:48, Martin Klemm wrote:
> Hello everyone,
>
> I implemented a picking functionality for the QuickRender example and my
> normal Workbench application. In both the same code is handling the
> picking. While it works in the workbench it produces completely wrong
> picks in the QuickRender example.
>
> The code of my Interactor looks basically like this:
>
> mitk::InteractionPositionEvent* positionEvent =
> dynamic_cast<mitk::InteractionPositionEvent*>(interactionEvent);
> if (positionEvent != NULL)
> {
> mitk::Point2D pos2D = positionEvent->GetPointerPositionOnScreen();
> mitk::Point3D pos3D = positionEvent->GetPositionInWorld();
> mitk::DataNode::Pointer pickedNode =
> positionEvent->GetSender()->PickObject(pos2D, pos3D);
> if ( pickedNode.IsNotNull() )
> {
> MITK_DEBUG("Interactor") << "Picked node: " <<
> pickedNode->GetName();
> //send message
> m_NodePickedMessage.Send(pickedNode);
> }
> }
>
> Does anyone knows where this error could come from? Is it possible that
> the QmlMitkRenderWindowItem is not doing the same as the QmitkRenderWindow?
>
> Best regards
>
> Martin
>
--
Martin Klemm
Hochschule Offenburg
Badstraße 24
77652 Offenburg
Tel. +49 781 / 205 - 4681
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