Longitudinal profile and cross sections AutoLisp source

Longitudinal profile and cross sections for the projection over a triangulation of a 2D POLYLINE, in AutoCAD or programs based on IntelliCAD, such as BricsCAD, ProgeCAD, ActCAD, ZWCAD, etc., 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" - the step used for the generation of points over a line segment of the 2D POLYLINE
- "chord_arc_Deviation" - admitted chord-arc deviation, whence arise the number of the points on the arcs
- "minimum_Arc_step" - the minimum distance between 2 consecutive points generated on the arcs
- "longitudinal_y_Scale" - y-axis (actually Z) scale of the longitudinal profile (e.g. 10 means 10:1 scale); x-axis scale is always 1:1
- "sec-Htext" - the height of the texts at projection, cross sections and longitudinal profile.
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).

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You are licensed to use this "Longitudinal profile and cross sections AutoLisp source", for drawing or to include it in your programs that you sell.