Select point in AIS_PointCloud

AIS_PointCloud supports detection of points within AIS_PointCloud::SM_Points selection mode, but this mode is designed for selection of entire cloud, not individual points.
AIS_PointCloud has no any BRep vertices, hence TopAbs_VERTEX and other selection modes available for AIS_Shape are not applicable to this presentation.

Though, AIS_PointCloud::SM_SubsetOfPoints has been introduced recently within current development branch (master).

Thanks Kirill, makes sense.

I can selected single points with

m_occView->context()->Display(m_pointsCloud, AIS_PointCloud::DisplayMode::DM_Points, AIS_PointCloud::SM_SubsetOfPoints, true);

but it doesn't matter how many points I select the result from following is always one object:

QList<Handle(AIS_InteractiveObject)> result; Handle(AIS_InteractiveObject) pointCloud;

m_occView->context()->InitSelected();
while( m_occView->context()->MoreSelected() )
{
    pointCloud = m_occView->context()->SelectedInteractive();
    result.append(pointCloud);
    m_occView->context()->NextSelected();
}
return result;

how to get access to the actually selected points?

Thanks!

AIS_InteractiveContext::SelectedInteractive() returns interactive object of selected entity, which will be always the same AIS_PointCloud as you have displayed all points with one object. To get point selection results you need requesting AIS_InteractiveContext::SelectedOwner() instead.

In case of a point cloud, this will be AIS_PointCloudOwner object, that have AIS_PointCloudOwner::SelectedPoints() method returning a map of indexes of selected points. The map is defined by TColStd_HPackedMapOfInteger which is a special map optimized for storing 32-bit integers (with more compact memory storage compared to a normal map and it also implements handy Boolean operators between maps).

Hi Mr. Gavrilov,
I used the classes you mentioned but I could not get any selected point information. I mean I select a point(Selection Mode is SM_SubsetOfPoints) with mouse click but after selection, when I call m_pCloudOwner->SelectedPoints(), it returns empty TColStd_HPackedMapOfInteger map. Before calling SelectedPoints() function, I initialize the owner (m_pCloudOwner = new AIS_PointCloudOwner(m_pointCloud);).

Can you help me?

Thanks,
Commenter-3

Hello, I have the same problem as you. Have you solved it？

Thanks Kirill, got it going.

the boolean operators are indeed handy.

great job guys!

Hello, can you tell me how to get some points from the point cloud in detail? Thank you