.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "auto_examples/10_animation/viz_using_time_equations.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_auto_examples_10_animation_viz_using_time_equations.py>`
        to download the full example code

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

.. _sphx_glr_auto_examples_10_animation_viz_using_time_equations.py:


=====================
Keyframe animation
=====================

Tutorial on making keyframe-based animation in FURY using custom functions.

.. GENERATED FROM PYTHON SOURCE LINES 8-22

.. code-block:: Python

    import numpy as np

    from fury import actor, window
    from fury.animation import Animation

    scene = window.Scene()

    showm = window.ShowManager(
        scene, size=(900, 768), reset_camera=False, order_transparent=True
    )


    cube = actor.cube(np.array([[0, 0, 0]]), (0, 0, 0), (1, 0, 1), scales=6)








.. GENERATED FROM PYTHON SOURCE LINES 23-24

Creating an ``Animation`` to animate the actor and show its motion path.

.. GENERATED FROM PYTHON SOURCE LINES 24-26

.. code-block:: Python

    anim = Animation(length=2 * np.pi, loop=True, motion_path_res=200)








.. GENERATED FROM PYTHON SOURCE LINES 27-29

Adding the sphere actor to the timeline
This could've been done during initialization.

.. GENERATED FROM PYTHON SOURCE LINES 29-32

.. code-block:: Python

    anim.add_actor(cube)









.. GENERATED FROM PYTHON SOURCE LINES 33-34

Creating time dependent functions.

.. GENERATED FROM PYTHON SOURCE LINES 34-56

.. code-block:: Python

    def pos_eval(t):
        return np.array([np.sin(t), np.cos(t) * np.sin(t), 0]) * 15


    def color_eval(t):
        return (
            np.array([np.sin(t), np.sin(t - 2 * np.pi / 3), np.sin(t + np.pi / 3)])
            + np.ones(3)
        ) / 2


    def rotation_eval(t):
        return np.array([np.sin(t) * 360, np.cos(t) * 360, 0])


    def scale_eval(t):
        return (
            np.array([np.sin(t), np.sin(t - 2 * np.pi / 3), np.sin(t + np.pi / 3)])
            + np.ones(3) * 2
        ) / 5









.. GENERATED FROM PYTHON SOURCE LINES 57-60

Setting evaluator functions is the same as setting interpolators, but with
one extra argument: `is_evaluator=True` since these functions does not need
keyframes as input.

.. GENERATED FROM PYTHON SOURCE LINES 60-65

.. code-block:: Python

    anim.set_position_interpolator(pos_eval, is_evaluator=True)
    anim.set_rotation_interpolator(rotation_eval, is_evaluator=True)
    anim.set_color_interpolator(color_eval, is_evaluator=True)
    anim.set_interpolator('scale', scale_eval, is_evaluator=True)








.. GENERATED FROM PYTHON SOURCE LINES 66-67

changing camera position to observe the animation better.

.. GENERATED FROM PYTHON SOURCE LINES 67-69

.. code-block:: Python

    scene.set_camera(position=(0, 0, 90))








.. GENERATED FROM PYTHON SOURCE LINES 70-71

Adding the animation to the show manager.

.. GENERATED FROM PYTHON SOURCE LINES 71-80

.. code-block:: Python

    showm.add_animation(anim)


    interactive = False

    if interactive:
        showm.start()

    window.record(scene, out_path='viz_keyframe_animation_evaluators.png', size=(900, 768))



.. image-sg:: /auto_examples/10_animation/images/sphx_glr_viz_using_time_equations_001.png
   :alt: viz using time equations
   :srcset: /auto_examples/10_animation/images/sphx_glr_viz_using_time_equations_001.png
   :class: sphx-glr-single-img






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

   **Total running time of the script:** (0 minutes 0.120 seconds)


.. _sphx_glr_download_auto_examples_10_animation_viz_using_time_equations.py:

.. only:: html

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

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

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

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

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


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_