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

.. only:: html

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

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

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

.. _sphx_glr__gallery_validation_validate_points_size.py:


Points with different sizes
===========================

* On the left are points with increasing size, without aa, they don't get smaller than one physical pixel.
* On the right are poonts with increasing size, with aa, really small points diminish with alpha.
* Note that due to the set pixel_ratio, a thickness of 2 is 1 physical pixel.
* The bottom row demonstrates per-vertex sizing.

.. GENERATED FROM PYTHON SOURCE LINES 10-50



.. image-sg:: /_gallery/validation/images/sphx_glr_validate_points_size_001.webp
   :alt: validate points size
   :srcset: /_gallery/validation/images/sphx_glr_validate_points_size_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(size=(800, 600))
    renderer = gfx.WgpuRenderer(canvas, pixel_ratio=0.5, pixel_filter=False)

    x = np.linspace(0, 4 * np.pi, 20)
    y = np.sin(x)

    positions = np.array([x, y, np.zeros_like(x)], np.float32).T.copy()
    geometry = gfx.Geometry(positions=positions, sizes=(10 - 4 * (positions[:, 1] + 1)))

    scene = gfx.Scene()

    for aa in [False, True]:
        y = 4
        for size in [0.125, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0, 16, 0]:
            line = gfx.Points(
                geometry,
                gfx.PointsMaterial(size=size, color=(1.0, 1.0, 1.0), aa=aa),
            )
            y += 2
            line.local.y = -y
            line.local.x = [-8, 8][aa]
            scene.add(line)
            if size == 0:
                line.material.size_mode = "vertex"

    camera = gfx.OrthographicCamera()
    camera.show_object(scene, scale=0.7)

    canvas.request_draw(lambda: renderer.render(scene, camera))

    if __name__ == "__main__":
        print(__doc__)
        loop.run()


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

   **Total running time of the script:** (0 minutes 0.239 seconds)


.. _sphx_glr_download__gallery_validation_validate_points_size.py:

.. only:: html

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

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

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

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

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

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

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