errorElement.matches utility after building an ErrorElement

[maximecharriere]

As i understand, when creating an ErrorElement, the following alignement is done to have all matrices of size knn*npts :

sourcePts are reordered to be aligned with their requestPts. matches are aligned too, but their value point to the index of the non-aligned sourcePts matrix (in green).

So, after creating an ErrorElement, errorElement.matches can no longer be used ? I'm correct ?

Shouldn't an explanation of ErrorElement be given somewhere?