Since there is no native command in Rhino similar to the MLINE command in AutoCAD, I am going to implement one by myself. During my everyday work, I constantly need this function to draw plan walls, punch holes/windows/doors, etc. One magic thing about MLINE is that it can create merged cross automatically. I wonder whether there are any existing solutions out there. If not, any suggestions/tips on how this can be done beautifully?
Note: I am aware of the plugin VisualARQ, but it is an overkill simply for this feature.