``hatch_color``
    color to use to stroke hatch patterns with

``hatch_alpha``
    floating point between 0 (transparent) and 1 (opaque)

``hatch_weight``
    line stroke width in units of pixels

``hatch_scale``
    a rough measure of the "size" of a pattern. This value has different
    specific meanings, depending on the pattern.

``hatch_pattern``
    a string name (or abbreviation) for a built-in pattern, or a string name
    of a pattern provided in ``hatch_extra``. The built-in patterns are:

    .. list-table:: Built-in Hatch Patterns
        :widths: 35 25 40
        :header-rows: 1

        * - FullName
          - Abbreviation
          - Example

        * - ``blank``
          - ``" "``
          - |blank|
        * - ``dot``
          - ``"."``
          - |dot|
        * - ``ring``
          - ``"o"``
          - |ring|
        * - ``horizontal_line``
          - ``"-"``
          - |horizontal_line|
        * - ``vertical_line``
          - ``"|"``
          - |vertical_line|
        * - ``cross``
          - ``"+"``
          - |cross|
        * - ``horizontal_dash``
          - ``'"'``
          - |horizontal_dash|
        * - ``vertical_dash``
          - ``":"``
          - |vertical_dash|
        * - ``spiral``
          - ``"@"``
          - |spiral|
        * - ``right_diagonal_line``
          - ``"/"``
          - |right_diagonal_line|
        * - ``left_diagonal_line``
          - ``"\\"``
          - |left_diagonal_line|
        * - ``diagonal_cross``
          - ``"x"``
          - |diagonal_cross|
        * - ``right_diagonal_dash``
          - ``","``
          - |right_diagonal_dash|
        * - ``left_diagonal_dash``
          - ``"`"``
          - |left_diagonal_dash|
        * - ``horizontal_wave``
          - ``"v"``
          - |horizontal_wave|
        * - ``vertical_wave``
          - ``">"``
          - |vertical_wave|
        * - ``criss_cross``
          - ``"*"``
          - |criss_cross|

``hatch_extra``
    a dict mapping string names to custom pattern implementations. The name
    can be referred to by ``hatch_pattern``. For example, if the following value
    is set for ``hatch_extra``:

    .. code-block:: python

        hatch_extra={ 'mycustom': ImageURLTexture(url=...) }

    then the name ``"mycustom"`` may be set as a ``hatch_pattern``.

.. |blank| image:: /_images/patterns/blank.png
    :height: 30
.. |dot| image:: /_images/patterns/dot.png
    :height: 30
.. |ring| image:: /_images/patterns/ring.png
    :height: 30
.. |horizontal_line| image:: /_images/patterns/horizontal_line.png
    :height: 30
.. |vertical_line| image:: /_images/patterns/vertical_line.png
    :height: 30
.. |cross| image:: /_images/patterns/cross.png
    :height: 30
.. |horizontal_dash| image:: /_images/patterns/horizontal_dash.png
    :height: 30
.. |vertical_dash| image:: /_images/patterns/vertical_dash.png
    :height: 30
.. |spiral| image:: /_images/patterns/spiral.png
    :height: 30
.. |right_diagonal_line| image:: /_images/patterns/right_diagonal_line.png
    :height: 30
.. |left_diagonal_line| image:: /_images/patterns/left_diagonal_line.png
    :height: 30
.. |diagonal_cross| image:: /_images/patterns/diagonal_cross.png
    :height: 30
.. |right_diagonal_dash| image:: /_images/patterns/right_diagonal_dash.png
    :height: 30
.. |left_diagonal_dash| image:: /_images/patterns/left_diagonal_dash.png
    :height: 30
.. |horizontal_wave| image:: /_images/patterns/horizontal_wave.png
    :height: 30
.. |vertical_wave| image:: /_images/patterns/vertical_wave.png
    :height: 30
.. |criss_cross| image:: /_images/patterns/criss_cross.png
    :height: 30
