Abstract: Step detection methods and apparatus are described. According to one aspect, a footstep detection method includes obtaining accelerometer data regarding movements of a user device, filtering the accelerometer data to remove frequencies above a typical stepping frequency range of a user, after the filtering, analyzing individual ones of a plurality of cycles of the accelerometer data to determine whether any of the individual cycles corresponds to a user taking a footstep with the user device, and as a result of the analyzing, indicating at least one of the individual cycles as corresponding to the user taking a footstep.

Abstract: Architectural structure design methods, architectural structure design apparatuses, and articles of manufacture are described according to some aspects of the disclosure. In one aspect, an architectural structure design method includes responsive to user input, modifying a visual representation of an architectural structure, wherein the visual representation comprises an object of the architectural structure, first displaying the visual representation comprising the object at a first moment in time, wherein the object is positioned at a first location of a display screen, responsive to user input, selecting an attribute for the object from a second location of the display screen which is different than the first location of the display screen, responsive to user input, associating the attribute with the object after the selecting, and displaying the visual representation comprising the object having the attribute at a second moment in time after the associating.

Abstract: Architectural structure design methods, architectural structure design apparatuses, and articles of manufacture are described according to some aspects of the disclosure. In one aspect, an architectural structure design method includes displaying a building plan of an architectural structure, accessing user input with respect to the building plan, modifying the building plan responsive to the user input, using the processing circuitry, analyzing the building plan to identify the presence of conditions appropriate to create a roof for the architectural structure, generating the roof responsive to the analyzing, and displaying the architectural structure comprising the roof after the generating.