.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "_gallery/feature_demo/multi_slice1.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_multi_slice1.py>`
        to download the full example code.

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

.. _sphx_glr__gallery_feature_demo_multi_slice1.py:


Volume and Mesh Slicing 1
=========================

Slice a volume and a mesh through the three primary planes (XY, XZ, YZ).
This example uses a mesh object with custom texture coordinates. This
is a generic approach. See multi_slice2.py for a simpler way.

.. GENERATED FROM PYTHON SOURCE LINES 9-84



.. image-sg:: /_gallery/feature_demo/images/sphx_glr_multi_slice1_001.webp
   :alt: multi slice1
   :srcset: /_gallery/feature_demo/images/sphx_glr_multi_slice1_001.webp
   :class: sphx-glr-single-img





.. code-block:: Python



    from time import time

    import imageio.v3 as iio
    import numpy as np
    from rendercanvas.auto import RenderCanvas, loop
    import pygfx as gfx
    import pylinalg as la


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

    dark_gray = np.array((169, 167, 168, 255)) / 255
    light_gray = np.array((100, 100, 100, 255)) / 255
    background = gfx.Background.from_color(light_gray, dark_gray)
    scene.add(background)

    scene.add(gfx.AxesHelper(size=50))

    vol = iio.imread("imageio:stent.npz").astype("float32") / 2000
    tex = gfx.Texture(vol, dim=3)
    material = gfx.MeshBasicMaterial(map=tex)

    planes = []
    texcoords = {
        0: [[0.5, 0, 0], [0.5, 1, 0], [0.5, 0, 1], [0.5, 1, 1]],
        1: [[0, 0.5, 0], [1, 0.5, 0], [0, 0.5, 1], [1, 0.5, 1]],
        2: [[0, 0, 0.5], [1, 0, 0.5], [0, 1, 0.5], [1, 1, 0.5]],
    }
    sizes = {
        0: (vol.shape[1], vol.shape[0]),  # YZ plane
        1: (vol.shape[2], vol.shape[0]),  # XZ plane
        2: (vol.shape[2], vol.shape[1]),  # XY plane (default)
    }
    for axis in [0, 1, 2]:
        geometry = gfx.plane_geometry(*sizes[axis], 1, 1)
        geometry.texcoords = gfx.Buffer(np.array(texcoords[axis], dtype="f4"))
        plane = gfx.Mesh(geometry, material)
        planes.append(plane)
        scene.add(plane)

        if axis == 0:  # YZ plane
            plane.local.rotation = la.quat_from_euler(
                (0.5 * np.pi, 0.5 * np.pi), order="XY"
            )
        elif axis == 1:  # XZ plane
            plane.local.rotation = la.quat_from_euler(0.5 * np.pi, order="X")
        # else: XY plane

    # camera = gfx.PerspectiveCamera(70, 16 / 9)
    camera = gfx.PerspectiveCamera(0)
    camera.world.reference_up = 0, 0, 1
    camera.local.position = (200, 200, 200)
    camera.show_pos((0, 0, 0))

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


    def animate():
        t = np.cos(time() / 2)
        plane = planes[2]
        plane.local.z = t * vol.shape[0] * 0.5
        plane.geometry.texcoords.data[:, 2] = (t + 1) / 2
        plane.geometry.texcoords.update_full()

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


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


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

   **Total running time of the script:** (0 minutes 0.310 seconds)


.. _sphx_glr_download__gallery_feature_demo_multi_slice1.py:

.. only:: html

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

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

      :download:`Download Jupyter notebook: multi_slice1.ipynb <multi_slice1.ipynb>`

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

      :download:`Download Python source code: multi_slice1.py <multi_slice1.py>`

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

      :download:`Download zipped: multi_slice1.zip <multi_slice1.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#multi_slice1.py"></iframe>