getPickedPoints

[suyufeng]

ccPointListPickingDlg::getPickedPoints()

How do I call it in the plugin to get the coordinates of the point selected by the mouse?

[suyufeng]

ccPointListPickingDlg *point_list_picking;
std::vector<cc2DLabel*> labels;
const int count = static_cast<int>(point_list_picking->getPickedPoints(labels)); //Crashes here

for ( int i = 0; i < count; ++i )
{
cc2DLabel* label = labels[static_cast<unsigned int>( i )];
const cc2DLabel::PickedPoint& PP = label->getPickedPoint(0);
CCVector3 P = PP.getPointPosition();
CCVector3d Pd = CCVector3d::fromArray(P.u);

for(int j = 0 ; j < 5; ++j)
{
tablewidget->insertRow(i);
tablewidget->setItem(i, j, new QTableWidgetItem(QStringLiteral( "%1" ).arg( Pd.u[j], 0, 'f', 0 )));
}
}

I want to use it in my plug-in. But it fell apart.I marked the breakdown.

unsigned ccPointListPickingDlg::getPickedPoints(std::vector<cc2DLabel*>& pickedPoints)
{
pickedPoints.clear();

if (m_orderedLabelsContainer) // Do not enter if，The debug message crashes here.
{
//get all labels
ccHObject::Container labels;
unsigned count = m_orderedLabelsContainer->filterChildren(labels, false, CC_TYPES::LABEL_2D);

try
{
pickedPoints.reserve(count);
}
catch (const std::bad_alloc&)
{
ccLog::Error("Not enough memory!");
return 0;
}

for (unsigned i = 0; i < count; ++i)
{
if (labels->isA(CC_TYPES::LABEL_2D)) //Warning: cc2DViewportLabel is also a kind of 'CC_TYPES::LABEL_2D'!
{
cc2DLabel* label = static_cast<cc2DLabel*>(labels);

if (label->isVisible() && label->size() == 1)
{
pickedPoints.push_back(label);
}
}
}
}

return static_cast<unsigned>(pickedPoints.size());
}

[suyufeng]

Forgot to mention, I noticed that this function is protected members, and I moved it to public.

[daniel]

No, you should use the ccPickingHub instead: https://github.com/CloudCompare/CloudCo ... ckingHub.h

[suyufeng]

Thank you very much.

I did my job with these functions.

if (!m_app->pickingHub()) //no valid picking hub
{
m_app->dispToConsole("[ccCompass] Could not retrieve valid picking hub. Measurement aborted.", ccMainAppInterface::ERR_CONSOLE_MESSAGE);
}

if (!m_app->pickingHub()->addListener(this, true, true))
{
m_app->dispToConsole("Another tool is already using the picking mechanism. Stop it first", ccMainAppInterface::ERR_CONSOLE_MESSAGE);
}

onItemPicked（）

I did my job of getting coordinates in onitemoicked, but I ran into a problem.

When I adjust the scalar, click on my plug-in to select the mouse point function, an exception occurs, the point cloud color disappears! The scalar is still the one I set. When I set the scalar again, the scalar will not be abnormal again.

[WargodHernandez]

we would need a lot more context to help track down the exception, what your showing has a risk that it would try to use an invalid picking hub since your valid picking hub check doesn't bail out of the function early.

but beyond that, we need information.

[suyufeng]

Thank you for your answer, we solved this problem, and we found that on the first click, cc created a scalar called "octree_picking" for the point cloud.

[daniel]

That's only in debug mode.

[lxx_13253530485]

Code: Select all

ccPickingHub* ph = m_app->pickingHub();
ph->addListener(this, true, true, ccGLWindow::POINT_PICKING);

When I use addListener(),vs does not recognize this external symbol at compile time. Do I need to add a library ?

This is a part of my cmakeList:

Code: Select all

# we need includes from the main CC source dir
	include_directories( ${CloudCompare_SOURCE_DIR} )

	#we need ccOverlay classes
	file( GLOB CC_PLUGIN_CUSTOM_HEADER_LIST ${CloudCompare_SOURCE_DIR}/../common/ccOverlayDialog*.h )
	file( GLOB CC_PLUGIN_CUSTOM_SOURCE_LIST ${CloudCompare_SOURCE_DIR}/../common/ccOverlayDialog*.cpp )

	#we also need picking hub classes
	list( APPEND CC_PLUGIN_CUSTOM_HEADER_LIST ${CloudCompare_SOURCE_DIR}/../common/ccPickingListener.h )
	list( APPEND CC_PLUGIN_CUSTOM_HEADER_LIST ${CloudCompare_SOURCE_DIR}/../common/ccPickingHub.h )
	list( APPEND CC_PLUGIN_CUSTOM_SOURCE_LIST ${CloudCompare_SOURCE_DIR}/../common/ccPickingHub.cpp )

And this is error:

Code: Select all

Severity	Code	Description	Project	File	Line	Suppression State
Error	LNK2019	unresolved external symbol "public: bool __cdecl ccPickingHub::addListener(class ccPickingListener *,bool,bool,enum ccGLWindow::PICKING_MODE)" (?addListener@ccPickingHub@@QEAA_NPEAVccPickingListener@@_N1W4PICKING_MODE@ccGLWindow@@@Z) referenced in function "protected: void __cdecl TestPlugin::doAction(void)" (?doAction@TestPlugin@@IEAAXXZ)

A sincere request!
Thanks!

[daniel]

Do you see the ccPickingHub source files in your plugin project? (and can you open the files?). Maybe the relative path is not right?