With symbols as blocks, every non-empty information field of a symbol
(label, manufacturer, reference, supplier, quantity...) is written as a
hidden attribute of its INSERT, tagged with the field's name. A CAD
program can then list the parts from the drawing, as with AutoCAD's
attribute extraction; hidden, they change nothing on screen, in any
reader. A field already written as a visible attribute (with
--dxf-attributes) is not repeated. The label formula is left out: it is
how the label is made, not part data.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
With symbols as blocks and the new "DXF : textes des symboles en
attributs" option (--dxf-attributes on the command line), a symbol's own
texts (its label, function, comment...) are attributes of its INSERT
instead of loose texts, so a CAD program moves them with the symbol and
can list or edit them. Each is written exactly where, and as, the text
was. A text showing an information field is tagged with its name
(LABEL, FUNCTION...), a typed text TEXT1, TEXT2...; a text's second line
gets _2. The block defines each tag once, placed where the first symbol
has it.
Its own option, off by default, because LibreCAD (2.2.1.5) does not
show attributes: the labels would vanish there. AutoCAD shows them.
The text geometry moves into textLines(), shared with the text loop,
so the attributes and the plain texts cannot drift apart.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
With "DXF : symboles en blocs" ticked in the export dialog, or
--dxf-blocks on the command line, each symbol definition a folio uses is
written once as a DXF block and every placed symbol as an INSERT of it.
A CAD program then selects, counts and replaces a symbol as one object.
The block is drawn by the same code as a symbol drawn in full, as if
the symbol sat unturned at the folio's origin, which is DXF (0,
sheetHeight): that is the block's base point, so the INSERT carries the
symbol's position and quarter-turn and nothing else. Blocks have to come
before any entity, so the export collects them first and dxfBegin()
writes them in its BLOCKS section. Entities in a block keep their own
layers. Off by default; with it off the file is unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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