Hi GeorgeSurveyor,
this couldn’t be done automatically, but there is one possible workaround.
First, create control points on the beginning a ending side of your walls. It will be better, when these control points will be in one height.
Then, in Mesh model tab/Pre-steps (optional)/Set reconstruction region there is an option Set region from control points:
You can use these created control points for Reconstruction region creation, which will be the base for ortho view creation. You will need three control points for reconstruction region creation. After its creation, you can change the size of the region and it will be parallel to a wall with two CPs.
If the created CPs won’t be in one height, the reconstruction region will be rotated. So it is possible to use these CPs as GCPs with exact coordinates and the same height.
Hope this will help you.