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

.. only:: html

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

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

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

.. _sphx_glr__gallery_feature_demo_mesh_dynamic.py:


Mesh dynamic
============

Example showing a Torus knot, dynamically changing what faces are shown.

.. GENERATED FROM PYTHON SOURCE LINES 7-42



.. image-sg:: /_gallery/feature_demo/images/sphx_glr_mesh_dynamic_001.webp
   :alt: mesh dynamic
   :srcset: /_gallery/feature_demo/images/sphx_glr_mesh_dynamic_001.webp
   :class: sphx-glr-single-img





.. code-block:: Python



    import imageio.v3 as iio
    import pygfx as gfx


    im = iio.imread("imageio:bricks.jpg")
    tex = gfx.Texture(im, dim=2)

    obj = gfx.Mesh(gfx.torus_knot_geometry(1, 0.3, 128, 16), gfx.MeshPhongMaterial(map=tex))
    obj.geometry.texcoords.data[:, 0] *= 10  # stretch the texture


    forward = True


    def animate():
        global forward
        indices = obj.geometry.indices
        if forward:
            offset = indices.draw_range[0] + 32
        else:
            offset = indices.draw_range[0] - 32
        if offset + 640 >= indices.nitems:
            forward = False
            offset = indices.nitems - 640
        if offset < 0:
            forward = True
            offset = 0
        indices.draw_range = offset, 640


    if __name__ == "__main__":
        disp = gfx.Display(before_render=animate, stats=True)
        disp.show(obj)


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

   **Total running time of the script:** (0 minutes 0.242 seconds)


.. _sphx_glr_download__gallery_feature_demo_mesh_dynamic.py:

.. only:: html

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

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

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

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

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

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

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


.. only:: html

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

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

.. only:: html

    Interactive example
    -------------------

    Try this example in your browser using Pyodide. Might not work with all examples and all devices. Check the output and your browser's console for details.

    .. raw:: html

        <iframe src="./../pyodide.html#mesh_dynamic.py"></iframe>