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Help with 3D terrain model DTM.
Costinbos77 posted a topic in AutoLISP, Visual LISP & DCLI succeeded one to write a lisp routine to build 3D terrain model (DTM = digital terrain model) using autocad 3DFACE based on a text file with coordinates: point number, x, y, z. This issue concerns me greatly. What sorting algorithm is necessary to point? Any ideas? Costin TIN Model.dwg