Change log

Added a table with perimeters and areas for gross areas, holes, and net areas in the results.
Added control to skip reading system blocks added by CAD, such as _CLOSEDFILLED and others added by Leaders such as _TAGCIRCLE, _TAGBOX and _TAGSLOT.

Correction in recognition of inner holes with elements on different layers but not recognized as materials.

Improvement in multi-user management, in simultaneous loading of drawings by multiple users.

Fix in the recognition of overlapping arcs for some units, in some cases the section was not read.
Improved reading of circumference arcs and circles. Some drawings sometimes have the extrusion direction different from the standard (0,0,1); handled the special case where it is in the Z direction with negative verse, i.e., with extrusion direction (0,0,-1). In 2D it corresponds to applying a mirror to entities.

Fix in importing circular hollow sections (CHS) for some units, in some cases the inner hole of the section was not recognized.
Fix in system block recognition, block names are now case insensitive as in CAD. For example, the system block is now recognized if written in the form _ARCHTICK or _ArchTick.

Support for DXF files up to the latest version, currently version 2023, is confirmed.

Allows drawings to be loaded without the $ACADVER variable set; the DXF 11/12 format is used by default, as in CAD programmes.
Set a time limit for the initial step of mesh creation. Done because a non-optimised drawing was loaded with a section with thousands of segments.

Updated support for DXF files, now they can be imported up to the latest version, currently version 2021.
Entities that are not in model space are now excluded in the import, what is in paper space is not considered.

Since there are many versions of DXF drawings, support extended to DXF drawings up to version 2000. Both binary and text formats are now supported, so all formats for each version. DXF in the 11/12 version remains preferred because it allows to obtain a more compact file, even if it dates back to 1990.
Drawing of central ellipse of inertia and of an ellipse to represent the shear stiffness.
On results page, in section drawing added indication of minimum and maximum coordinates, these update when unit of measurement is changed on page. To obtain this functionality it is necessary to reload DXF drawing.
Added a log to see the processing progress. Useful for highlighting errors and for providing real-time processing progress.
Refactoring the section results page to improve readability and have more information in widescreen monitors.

Added import of binary DXF 11/12 format, both DXF 11/12 formats are now supported.
Added the reading of the line and circumference arc entities.
If there are no blocks, the reading passes to the drawing entities.
Added a logger to highlight the steps of drawing reading.