  This paper describes a novel approach for generating accurate floor plans and
3D models of building interiors using scanned mesh data. Unlike previous
methods, which begin with a high resolution point cloud from a laser
range-finder, our approach begins with triangle mesh data, as from a Microsoft
HoloLens. It generates two types of floor plans, a "pen-and-ink" style that
preserves details and a drafting-style that reduces clutter. It processes the
3D model for use in applications by aligning it with coordinate axes,
annotating important objects, dividing it into stories, and removing the
ceiling. Its performance is evaluated on commercial and residential buildings,
with experiments to assess quality and dimensional accuracy. Our approach
demonstrates promising potential for automatic digitization and orientation of
scanned mesh data, enabling floor plan and 3D model generation in various
applications such as navigation, interior design, furniture placement,
facilities management, building construction, and HVAC design.
