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

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

.. _sphx_glr__gallery_other_collection_line.py:


Performance of drawing many Lines
=================================

Display a lot of line objects. Because of the architecture of wgpu,
this is still performant.

.. GENERATED FROM PYTHON SOURCE LINES 8-64

.. code-block:: Python



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


    canvas = RenderCanvas(max_fps=999)
    renderer = gfx.WgpuRenderer(canvas, show_fps=True)
    scene = gfx.Scene()


    # Define number of vertices
    cols = 20
    rows = 50
    nvertices = 30000
    use_thin_lines = True

    print(nvertices * rows * cols, "vertices in total")

    x = np.linspace(0.05, 0.95, nvertices, dtype=np.float32)


    for row in range(rows):
        for col in range(cols):
            y = np.sin(x * 25) * 0.45 + np.random.normal(0, 0.02, len(x)).astype(np.float32)
            positions = np.column_stack([x, y, np.zeros_like(x)])
            geometry = gfx.Geometry(positions=positions)
            if use_thin_lines:
                material = gfx.LineThinMaterial(color=(col / cols, row / rows, 0.5, 1.0))
            else:
                material = gfx.LineMaterial(
                    thickness=0.2 + 2 * row / rows, color=(col / cols, row / rows, 0.5, 1.0)
                )
            line = gfx.Line(geometry, material)
            line.local.x = col
            line.local.y = row
            scene.add(line)

    camera = gfx.OrthographicCamera(cols, rows, maintain_aspect=False)
    camera.show_object(scene)
    controller = gfx.PanZoomController(camera, register_events=renderer)

    stats = gfx.Stats(viewport=renderer)


    def animate():
        with stats:
            renderer.render(scene, camera, flush=False)
        stats.render()
        canvas.request_draw()


    if __name__ == "__main__":
        canvas.request_draw(animate)
        loop.run()


.. _sphx_glr_download__gallery_other_collection_line.py:

.. only:: html

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

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

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

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

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

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

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