Doc Object Link to Sub-objects?

General Development
1

I am working on this:

def makePathArray(baseobject,pathobject,count,xlate=None):
    '''makePathArray(docobj,path,count,xlate): distribute count copies 
    of a document baseobject along a pathobject (docobject with shapetype=Wire/Edge).  
    Optionally translates each copy by FreeCAD.Vector xlate direction and 
    distance to adjust for difference in shape centre vs shape reference point. '''

I foresee a need to use only some edges from ‘pathobject’, but I don’t see a way to maintain
a reference to those edges (edge index/name is not reliable, yes?). “App::PropertyLinkList”
only works with document objects, not TopoShapes. Any suggestions?

Current basic working version of makePathArray is here: https://github.com/WandererFan/freecad-dev/tree/pArray
Comments more than welcome.

The next version will address orienting the baseobject to the path. Need to relearn some math first.

wf

2

Until the reimplementation of the Naming the index is reliably as it can be. At the moment the PropertyLinkSub properties use them too..

3

Yes, PropertyLinkSub is your friend. Note that it can take only one (object,subobjectname) tuple. So you cannot use it for, for example, several edges. But anyway, for a path, I guess you’d better use a wire. Otherwise, you can use PropertyLinkSubList which takes a list of those tuples.