Measure angle by 3 points with dynamic draw (12d App)

Source code and compiled test macro demonstrating my library for user measurement of an angle by picking 3 points with dynamic drawing of the pick and measurement.  This code was initially written for the Rotate Relative macro (Utilities→H-Z→Rotate relative) and was based on the behaviour of the in-built Measure Angle by 3pts (Utilities→Measure→Angle x 3pts). The behaviour of this code is, however, slightly different in the order of picks with the base point being picked first. The main complexity involved… Read moreMeasure angle by 3 points with dynamic draw (12d App)