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

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_gallery_scene_colored_line.py>`
        to download the full example code

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

.. _sphx_glr_gallery_scene_colored_line.py:


Changing Line Colors
====================

.. GENERATED FROM PYTHON SOURCE LINES 11-50



.. image-sg:: /gallery/scene/images/sphx_glr_colored_line_001.gif
   :alt: colored line
   :srcset: /gallery/scene/images/sphx_glr_colored_line_001.gif
   :class: sphx-glr-single-img





.. code-block:: Python

    import itertools
    import numpy as np

    from vispy import app, scene
    from vispy.color import get_colormaps
    from vispy.visuals.transforms import STTransform

    colormaps = itertools.cycle(get_colormaps())

    # vertex positions of data to draw
    N = 200
    pos = np.zeros((N, 2), dtype=np.float32)
    pos[:, 0] = np.linspace(10, 390, N)
    pos[:, 1] = np.random.normal(size=N, scale=20, loc=0)


    canvas = scene.SceneCanvas(keys='interactive', size=(400, 200), show=True)

    # Create a visual that updates the line with different colormaps
    color = next(colormaps)
    line = scene.Line(pos=pos, color=color, method='gl')
    line.transform = STTransform(translate=[0, 140])
    line.parent = canvas.central_widget

    text = scene.Text(color, bold=True, font_size=24, color='w',
                      pos=(200, 40), parent=canvas.central_widget)


    def on_timer(event):
        global colormaps, line, text, pos
        color = next(colormaps)
        line.set_data(pos=pos, color=color)
        text.text = color

    timer = app.Timer(.5, connect=on_timer, start=True)


    if __name__ == '__main__':
        canvas.app.run()


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

   **Total running time of the script:** (0 minutes 1.055 seconds)


.. _sphx_glr_download_gallery_scene_colored_line.py:

.. only:: html

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

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

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

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

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


.. only:: html

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

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