Mon, 12/10/2018 - 17:38
Forums:
Hi everyone,
I try to get the face selected in an opencascade viewer but i don't know how to do this. When I load a step I add the shape in the context and I activate the face selection like this :
m_aisContext->Activate(m_aisObject, AIS_Shape::SelectionMode(TopAbs_FACE));
This woks, only the face are selectable in the viewer. But finally, when I pick the face I don't kown how to get the information of this face.
The action to pick the face works because the the face is highlight in the viewer but when I check the context the selected face is empty, idem for the owner. Someone know the solution ?
Regards,
Manon
Attachments:
Tue, 12/11/2018 - 17:28
Are you using code similar to that one?
if (0 != interactiveContext->NbSelected())
{
for (interactiveContext->InitSelected(); interactiveContext->MoreSelected();
interactiveContext->NextSelected())
{
const Handle(AIS_InteractiveObject) object =
interactiveContext->SelectedInteractive();
...
}
}
This works here.
Benjamin
Tue, 12/11/2018 - 18:36
Thanks for your answer,
Finally I have solved my problem, with interactiveContext->MainSelector()->OnePicked() I get the SelectMgr_EntityOwner under the mouse and it exactly what I need !
Manon
Thu, 01/10/2019 - 09:20
Hi,
could you please share the code.
thanks
Anilkumar
Thu, 01/10/2019 - 12:00
Hi Anil,
I use Qt for the interface, so in the eventFilter function of your widget you need to get your contest and check which face is under you mouse at the moment. I paste my event function :
bool QtController::eventFilter(QEvent* event)
{
switch (event->type()) {
case QEvent::MouseButtonPress: {
auto mouseEvent = static_cast<const QMouseEvent*>(event);
if (mouseEvent->button() == Qt::LeftButton) {
// get your context
const Handle_AIS_InteractiveContext& ctx = m_document->aisInteractiveContext();
if (ctx->HasDetected() && ctx->MainSelector()->NbPicked() > 0) {
auto x = ctx->MainSelector()->OnePicked();
// get the list of entity owner (list which contains all the entity in your context, complete the list at each new object add in the context)
// example to construct the list of entity owner :
// Handle_AIS_InteractiveObject aisObject = new AIS_Shape(myshape);
// aisContext->Display(aisObject, true);
// opencascade::handle<SelectMgr_IndexedMapOfOwner> mapEntityOwner;
// aisContext->EntityOwners( mapEntityOwner, aisObject, AIS_Shape::SelectionMode(TopAbs_FACE));
// vecGpxEntityOwner.reserve(mapEntityOwner->Extent());
// for (auto it = mapEntityOwner->cbegin(); it != mapEntityOwner->cend(); ++it)
// vecGpxEntityOwner.push_back(std::move(*it));
std::vector<Handle_SelectMgr_EntityOwner> vecGpxEntityOwner = m_document->vecGpxEntityOwner;
int cpt = 0;
for (const Handle_SelectMgr_EntityOwner& owner : vecGpxEntityOwner)
{
if (owner == x)
{
qDebug() << "face picked :: " << cpt;
_m_currentFacePicked = cpt;
}
cpt++;
}
}
else {
_m_currentFacePicked = -1;
}
return true;
}
default: return false;
} // end switch
return false;
}
Manon