.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "examples/image-box/test_glow_zero.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_examples_image-box_test_glow_zero.py>`
        to download the full example code.

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_examples_image-box_test_glow_zero.py:


====================
Gradient in data coordinates
====================

.. GENERATED FROM PYTHON SOURCE LINES 7-62



.. image-sg:: /examples/image-box/images/sphx_glr_test_glow_zero_001.png
   :alt: Cyberpunk
   :srcset: /examples/image-box/images/sphx_glr_test_glow_zero_001.png
   :class: sphx-glr-single-img





.. code-block:: Python

    import numpy as np

    import matplotlib.pyplot as plt
    import mplcyberpunk

    # from mpl_visual_context.pe_cyberfunk import GlowStroke
    from matplotlib.patheffects import Normal
    from mpl_visual_context.patheffects import Glow, AlphaGradient
    from mpl_visual_context.artist_helper import get_datalim

    plt.style.use("cyberpunk")

    fig, ax = plt.subplots(num=1, clear=True)

    x = np.linspace(0, 7, 20)
    y1 = np.sin(x)
    y2 = np.cos(x)

    (l1,) = ax.plot(y1, marker='o')
    (l2,) = ax.plot(y2, marker='o')
    p1 = ax.fill_between(x=np.arange(len(y1)), y1=y1, y2=0)
    p2 = ax.fill_between(x=np.arange(len(y1)), y1=y2, y2=0)

    ax.set_title("Cyberpunk", fontsize=30)

    for l in [l1, l2]:
        l.set_path_effects([Glow(), Normal()])

    for p in [p1, p2]:
        # bbox can be a callable objects with a renderer as an argument, returning
        # a bbox object.
        def get_bbox_up(renderer):
            # returns a bbox enclosing an artist in data coordinate, but its bottom
            # coordinate replaced to zero.
            bbox = get_datalim(p)
            bbox.y0 = 0
            return bbox

        def get_bbox_down(renderer):
            # returns a bbox enclosing an artist in data coordinate, but its upper
            # coordinate replaced to zero.
            bbox = get_datalim(p)
            bbox.y1 = 0
            return bbox

        alpha_max = 0.3
        bbox_image_up = AlphaGradient(
            f"0 ^ {alpha_max}", bbox=get_bbox_up, axes=ax, coords="data"
        )
        bbox_image_down = AlphaGradient(
            f"{alpha_max} ^ 0.", bbox=get_bbox_down, axes=ax, coords="data"
        )
        p.set_path_effects([bbox_image_up, bbox_image_down])

    plt.show()


.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 0.118 seconds)


.. _sphx_glr_download_examples_image-box_test_glow_zero.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: test_glow_zero.ipynb <test_glow_zero.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: test_glow_zero.py <test_glow_zero.py>`

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: test_glow_zero.zip <test_glow_zero.zip>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_