I am new to SU, and trying to follw good practice guidelines by working on Layer 0 initially, and using groups to separate geometry.
I am creating a model of my Georgian cottage for use in restoration and improvment work. I am creating it by tracing over architectural plans, imported into Sketchup and resized to ensure correct scale.
Currently I am tracing the external walls. I have subdivided these into groups as the house has sections built at different times with different heights, foundation depths, materials etc. I intend to allocate these groups to one super group of all external walls.
I created the first group, the main Georgian walls and that went fine. Then I wanted to add a second group, the pre-geogian Farmstead walls, which abut the main Georgian walls. Obviously I want them to be physically linked to the main Geogian walls, but not part of the same sub-group.
My problem is that if I draw the Farmstead walls from the Geogian walls SU appears to add them to the main Georgian walls group. If I start somewhere else, add the resulting edges to the Farmstead walls group, then draw from an edge in the Farmstead walls group to join the Georgian walls group, the resulting edges appear variably assigned to no group, the correct group or one of the other groups, and I am not sure how to reallocate them. There seems to be a create group function but I cannot find an add to group or change group allocation function.
And when I do it this way the faces in the Farmstead group don’t close, I suppose because I am relying on an edge from another group, the Georgian group for the closure. I am not sure how to create a duplicate Farmstead closure edge along a Geogian group edge, and ensure it is part of the Farmstead not the Geogian group.
I eventually found a way to achieve what I wanted, though it is complex and does not lead to a precise junction with the Georgian group. I created the Farmstead walls separately, keeping them separate while I traced them by truncating the walls that were eventually to abut the Georgian group. Face closure was achieved, so I could pull the flat edges up into 3D walls. The separation allowed all the edges in the group to be selected without selecting the Geogian group, so a separate Farmstead group could be made. Then I pulled the relevant farmstead walls so they did abut the Geogian walls. But the abbuttal is not accurate and, as I am tracing from an existing plan I am not sure this technicque will work in all cases.
So my question is whether there is an easier and more natural way to do this. I am sure I am missing sometyhing obvious!