DXF to XYZ converter

You can see how to convert a DXF file into a XYZ point file.
RTOPO software (https://rcad.eu/rtopo/) converts a drawing containing entities as Polyline, 3DPoly, Line, Blocks and Text, in points having codes (XYZ file) and then in Digital Terrain Model, by triangulation.
The steps are as follows:
1) Loading a DXF file
2) There are LINE entities that are not joined in POLYLINE
3) Using MJOIN command, all the segments are joined
4) The POLYLINE layer will define the code of the points that will be generated on it
5) Using LAYER, RENAME, FILE, with a file of RLN extension, several layers names will be changed
6) MEASURE, ALL command will generate the points
7) Then the points are exported to a XYZ file
8) We start a new work session with "New" and we load the XYZ file of points using "Load points"
9) In continuation, we can do various processing
10) Triangulation
11) Isolines or color filled contour map