This repo is an initial experimental attempt to create a workflow for parametric glyphs in SVG.
It includes definitions of some glyphs, and several scripts that iterate over these files:
-
tabulate_params.pyconstructs a CSV table summarising the default parameters defined for each. -
convert.pygenerated pdf/png/svg files
The idea of Parametric SVG is to supplement
existing attributes of SVG elements (e.g., x), which have specific numerical values, with new attributes that are in a different namespace (e.g., parametric: x) and have values that can be arithmetic expressions including parameters.
Tool that do not know about Paramateric SVG will ignore these additional attributes and render using the conventional SVG attributes.
However, specialised tools can allow a user to set parameters and update the conventional SVG attributes by evaluating the expression in their parametric equivalent.
SBOL Visual Glyphs are defined as Parametric SVG files, with some additional conventions.
The SVG tag has two additional attributes:
glyphtype(the name of the glyph)soterms(a comma-separated list of Sequence Ontology terms that apply to the glyph)
Classes are applied to elements to indicate their role and allow their appearance to be easily controlled.
The bounding-box and baseline classes depict the elements described in SEP V001;
they are not part of the glyph itself, but rather show how the glyph should be position.
The filled-path and unfilled-path class represent the interior and exterior of the glyph itself.
Glyphs with simple shapes might consist of a single element, with class filled-path.
The unfilled-path class is used to
Parameter names are standardised, so that glyphs can be manipulated in a predictable way.
The initially proposed parametrisation is summarised here. However, camelCase has been replaced by snake_case.
The script tabulate_params.py can be used to see which names are in use.