opensim 3.3 C++/ add marker problem

[yujin kim]

Hi, I'm trying to use the existing lumbar spine model at the opensim project using opensim 3.3 C++ api.
And I'm new to the opensim api.

I have a problem to add a marker to markerset.
I tried to put the marker to the "lumbar1" and it wasn't working.

Code: Select all

 MarkerSet markerSet = osimModel.getMarkerSet();
			
const BodySet& bodySet = osimModel.getBodySet();
OpenSim::Body l1 = bodySet.get("lumbar1");	
	
const double offset1[] = { 0.5,0.5,0.5 };
Marker& m1 = *markerSet.addMarker("testMarker1", offset1, l1);
osimModel.updateMarkerSet(markerSet);

Please help me.

[Thomas Uchida]

Have you tried fetching a writable reference to the MarkerSet instead (i.e., use updMarkerSet() rather than getMarkerSet())? I think the code would look something like this:

Code: Select all

MarkerSet& ms = osimModel.updMarkerSet();
const double offset[] = {0.5, 0.5, 0.5};
Marker* newMarker = ms.addMarker("myMarker", offset, osimModel.getBodySet().get("lumbar1"));