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Doc: added new to expression documentation #508

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Jul 4, 2022
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Doc: added new to expression documentation #508

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Doc: added new to expression documentation
abey79 Jul 4, 2022
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Update CHANGELOG.md
abey79 Jul 4, 2022
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2 changes: 1 addition & 1 deletion CHANGELOG.md
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Expand Up @@ -8,7 +8,7 @@ Release date: UNRELEASED

* Added the `splitdist` command to split layers by drawing distance (thanks to @LoicGoulefert) (#487, #501)
* Added `--keep-page-size` option to `grid` command (#506)
* Added meters (`m`) and feet (`ft`) to the supported units (#498)
* Added meters (`m`) and feet (`ft`) to the supported units (#498, #508)
* Improved the `linemerge` algorithm by making it less dependent on line order (#496)
* Added HPGL configurations for the Houston Instrument DMP-161, HP7550, Roland DXY 1xxxseries and sketchmate plotters (thanks to @jimmykl and @ithinkido) (#472, #474)
* The `forfile` command now sorts the files by their name before processing them (#506)
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4 changes: 2 additions & 2 deletions docs/fundamentals.rst
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Expand Up @@ -346,9 +346,9 @@ In addition, the following *vpype*-specific symbols are available:

These special objects provide access to the global or current-layer properties. Properties may be accessed by attribute (e.g. ``%prop.vp_name%``) or indexation (e.g. ``%prop['vp_name']%``). The ``gprop`` object provides access to global properties. The ``lprop`` object provides access to the current layer's properties if available (i.e. within :ref:`generator <fundamentals_generators>` and :ref:`layer processor <fundamentals_layer_processors>` commands). The ``prop`` object looks first for current-layer properties, if any, and then for global properties.

* Units constants (``px``, ``in``, ``mm``, ``cm``, ``pc``, ``pt``).
* Units constants (``px``, ``in``, ``ft``, ``mm``, ``cm``, ``m``, ``pc``, ``pt``).

These constants may be used to convert values to CSS pixels unit, which *vpype* uses internally. For example, the expression ``%(3+4)*cm%`` evaluates to the pixel equivalent of 7 centimeters (e.g. ~264.6 pixels).
These variables may be used to convert values to CSS pixels unit, which *vpype* uses internally. For example, the expression ``%(3+4)*cm%`` evaluates to the pixel equivalent of 7 centimeters (e.g. ~264.6 pixels). (Note that expressions may overwrite these variables, e.g. to use the ``m`` variable for another purpose.)

* The ``glob(pattern)`` function.

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