Longitudinal profile and cross sections AutoLisp source

Longitudinal profile and cross sections AutoLisp source for the projection over a triangulation of a 2D POLYLINE is useful for surveyors and designers. 2D POLYLINE may contain arcs. Beforehand, a DWG file with a triangulation (with 3DFACE entities) must be opened. Possible options: “Line_step”, “chord_arc_Deviation”, “minimum_Arc_step”, “longitudinal_y_Scale”, “sec-Htext”. Finally you will have to enter the left and right perpendicular distance in every points generated on POLYLINE. Up to these distance it will be generated the cross sections (at 1:1 scale).
It can be run on AutoCAD or IntelliCAD (Bricscad, ProgeCAD, Cadopia, etc.) on any number of computers, without any restrictions.
https://rcad.eu/autolisp_source/