.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "_gallery/feature_demo/picking_points.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_picking_points.py>`
        to download the full example code.

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

.. _sphx_glr__gallery_feature_demo_picking_points.py:


Point Picking
=============

Example showing picking points. When clicking on a point, it's location
is changed. With a small change, a line is shown instead.

.. GENERATED FROM PYTHON SOURCE LINES 8-43



.. image-sg:: /_gallery/feature_demo/images/sphx_glr_picking_points_001.webp
   :alt: picking points
   :srcset: /_gallery/feature_demo/images/sphx_glr_picking_points_001.webp
   :class: sphx-glr-single-img





.. code-block:: Python



    import numpy as np
    from rendercanvas.auto import RenderCanvas, loop
    import pygfx as gfx


    canvas = RenderCanvas()
    renderer = gfx.renderers.WgpuRenderer(canvas)
    scene = gfx.Scene()

    xx = np.linspace(-50, 50, 10)
    yy = np.random.uniform(20, 50, 10)
    geometry = gfx.Geometry(positions=[(x, y, 0) for x, y in zip(xx, yy, strict=True)])
    ob = gfx.Points(
        geometry, gfx.PointsMaterial(color=(0, 1, 1, 1), size=20, pick_write=True)
    )
    scene.add(ob)

    camera = gfx.OrthographicCamera(120, 120)


    @ob.add_event_handler("pointer_down")
    def offset_point(event):
        info = event.pick_info
        if "vertex_index" in info:
            i = round(info["vertex_index"])
            geometry.positions.data[i, 1] *= -1
            geometry.positions.update_range(i)
            canvas.request_draw()


    if __name__ == "__main__":
        canvas.request_draw(lambda: renderer.render(scene, camera))
        loop.run()


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

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


.. _sphx_glr_download__gallery_feature_demo_picking_points.py:

.. only:: html

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

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

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

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

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

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

      :download:`Download zipped: picking_points.zip <picking_points.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#picking_points.py"></iframe>