Wall detection on floor plan

The algorithm searches the point cloud for parallel wall planes with high accuracy and creates the wall with mm accuracy.

1. Draw a cursor line along and near the center of the point cloud points
representing the two sides of the wall.

2. Then use the expanding rectangle cursor to enclose the two sides of the
wall. 

3. Press Enter to create the new wall.

Repeat it in a loop.
 

Then you can edit the wall connections using the L, T connection commands.