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

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

.. _sphx_glr__gallery_feature_demo_light_shadow.py:


Directional Shadow 2
====================

This example demonstrates the effects of directional light shadows (from
DirectionalLight) and omnidirectional shadows (from PointLight).

.. GENERATED FROM PYTHON SOURCE LINES 9-112



.. image-sg:: /_gallery/feature_demo/images/sphx_glr_light_shadow_001.webp
   :alt: light shadow
   :srcset: /_gallery/feature_demo/images/sphx_glr_light_shadow_001.webp
   :class: sphx-glr-single-img





.. code-block:: Python



    import time
    import math
    import pylinalg as la

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


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

    cube = gfx.Mesh(
        gfx.box_geometry(20, 20, 20),
        gfx.MeshPhongMaterial(),
    )
    cube.local.rotation = la.quat_from_euler((math.pi / 6, math.pi / 6), order="XY")
    cube.cast_shadow = True
    scene.add(cube)

    cube2 = gfx.Mesh(
        gfx.box_geometry(50, 50, 50),
        gfx.MeshPhongMaterial(),
    )
    cube2.local.rotation = la.quat_from_euler((math.pi / 4, math.pi / 4), order="XY")
    cube2.local.position = (0, -150, 0)
    cube2.cast_shadow = True
    cube2.receive_shadow = True
    scene.add(cube2)

    cube3 = gfx.Mesh(
        gfx.box_geometry(100, 100, 100),
        gfx.MeshPhongMaterial(),
    )

    cube3.local.position = (0, -250, 0)
    cube3.cast_shadow = True
    cube3.receive_shadow = True
    scene.add(cube3)

    t = np.linspace(0, 10, 100).astype(np.float32)
    xyz = 20 * np.sin(2 * t), 20 * np.sin(3 * t) + 50, 20 * np.sin(t)
    line1 = gfx.Line(
        gfx.Geometry(positions=np.column_stack(xyz)),
        gfx.LineMaterial(color="#088", thickness=5),
    )
    line1.cast_shadow = True
    scene.add(line1)

    box = gfx.Mesh(
        gfx.box_geometry(600, 600, 600),
        gfx.MeshPhongMaterial(color="#808080", side="Back"),
    )

    box.local.rotation = la.quat_from_euler((-math.pi / 2), order="XY")
    box.local.position = (0, 0, 0)
    box.receive_shadow = True
    box.cast_shadow = False
    scene.add(box)

    ambient = gfx.AmbientLight()

    scene.add(ambient)

    light = gfx.PointLight("#4040ff", 500000, decay=2)
    light.local.x = 15
    light.local.y = 20

    light.cast_shadow = True
    scene.add(light.add(gfx.PointLightHelper(5)))

    light2 = gfx.DirectionalLight("#aaaaaa")
    light2.local.position = (-150, 100, 100)
    light2.cast_shadow = True

    scene.add(light2.add(gfx.DirectionalLightHelper(100)))

    camera = gfx.PerspectiveCamera(70, 16 / 9)
    camera.local.position = (100, 100, 350)
    camera.show_pos((0, 0, 0))

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


    def animate():
        t = time.time() * 0.5
        scale = 150

        light.local.position = (
            math.cos(t) * math.cos(3 * t) * scale,
            math.cos(3 * t) * math.sin(t) * scale / 2,
            math.sin(3 * t) * scale,
        )

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


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


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

   **Total running time of the script:** (0 minutes 0.764 seconds)


.. _sphx_glr_download__gallery_feature_demo_light_shadow.py:

.. only:: html

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

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

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

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

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

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

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