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

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

.. _sphx_glr__gallery_feature_demo_paint_to_texture.py:


Paint to a texture
==================

This example shows an application that allows the user to paint an image
onto a texture.

This also demonstrates a custom controller config, that only allows
horizontal panning over the texture, using shift+mouse or scrolling.

.. GENERATED FROM PYTHON SOURCE LINES 11-64



.. image-sg:: /_gallery/feature_demo/images/sphx_glr_paint_to_texture_001.webp
   :alt: paint to texture
   :srcset: /_gallery/feature_demo/images/sphx_glr_paint_to_texture_001.webp
   :class: sphx-glr-single-img





.. code-block:: Python



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

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

    scene.add(gfx.Background.from_color("#cde"))

    # Create texture to draw to. We set the force_contiguous flag because we will sync the texture regularly
    data = np.zeros((100, 500), np.uint8)
    tex = gfx.Texture(data, dim=2, force_contiguous=True)

    image = gfx.Image(
        gfx.Geometry(grid=tex),
        gfx.ImageBasicMaterial(clim=(0, 200), pick_write=True),
    )
    scene.add(image)


    camera = gfx.OrthographicCamera()
    camera.show_rect(-5, 105, -5, 105)


    @image.add_event_handler("pointer_down", "pointer_move")
    def pick(event):
        if event.modifiers:
            return
        if 1 in event.buttons or 2 in event.buttons:
            info = event.pick_info
            if "index" in info:
                x, y = info["index"]
                if 1 in event.buttons:
                    tex.data[y, x] = min(200, tex.data[y, x] + 50)
                else:
                    tex.data[y, x] = max(0, tex.data[y, x] - 50)
                tex.update_indices(x, y, 0)
                renderer.request_draw()


    controller = gfx.PanZoomController(camera, register_events=renderer)

    controller.controls = {
        "shift+mouse1": ("pan", "drag", (1, 0)),
        "wheel": ("pan", "push", (-0.05, 0)),
        "mouse3": ("quickzoom", "peek", 2),
    }

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


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

   **Total running time of the script:** (0 minutes 0.197 seconds)


.. _sphx_glr_download__gallery_feature_demo_paint_to_texture.py:

.. only:: html

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

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

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

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

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

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

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