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

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

.. _sphx_glr__gallery_validation_validate_blend_additive.py:


Additive Blending
=================

This example draws overlapping circles of reference colors with additive blending.

.. GENERATED FROM PYTHON SOURCE LINES 7-48



.. image-sg:: /_gallery/validation/images/sphx_glr_validate_blend_additive_001.webp
   :alt: validate blend additive
   :srcset: /_gallery/validation/images/sphx_glr_validate_blend_additive_001.webp
   :class: sphx-glr-single-img





.. code-block:: Python



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

    colors = ["#ff0000", "#00ff00", "#0000ff"]
    distance_from_center = 0.5

    canvas = RenderCanvas()
    renderer = gfx.WgpuRenderer(canvas, gamma_correction=1.0)
    camera = gfx.OrthographicCamera()
    camera.show_rect(-2, 2, -2, 2)
    scene = gfx.Scene()

    plane = gfx.sphere_geometry(height_segments=64)
    N = len(colors)
    initial_angle = np.pi / 2
    for i, color in enumerate(colors):
        angle = -2 * np.pi * i / N + initial_angle
        x = distance_from_center * np.cos(angle)
        y = distance_from_center * np.sin(angle)

        m = gfx.Mesh(
            plane,
            gfx.MeshBasicMaterial(
                color=color,
                alpha_mode="add",
            ),
        )
        m.local.x = x
        m.local.y = y
        scene.add(m)


    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 0.189 seconds)


.. _sphx_glr_download__gallery_validation_validate_blend_additive.py:

.. only:: html

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

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

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

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

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

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

      :download:`Download zipped: validate_blend_additive.zip <validate_blend_additive.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_blend_additive.py"></iframe>