

.. _sphx_glr_gallery_animation_simple_3danim.py:


============
3D animation
============

A simple example of an animated plot... In 3D!




.. image:: /gallery/animation/images/sphx_glr_simple_3danim_001.png
    :align: center





.. code-block:: python

    import numpy as np
    import matplotlib.pyplot as plt
    import mpl_toolkits.mplot3d.axes3d as p3
    import matplotlib.animation as animation

    # Fixing random state for reproducibility
    np.random.seed(19680801)


    def Gen_RandLine(length, dims=2):
        """
        Create a line using a random walk algorithm

        length is the number of points for the line.
        dims is the number of dimensions the line has.
        """
        lineData = np.empty((dims, length))
        lineData[:, 0] = np.random.rand(dims)
        for index in range(1, length):
            # scaling the random numbers by 0.1 so
            # movement is small compared to position.
            # subtraction by 0.5 is to change the range to [-0.5, 0.5]
            # to allow a line to move backwards.
            step = ((np.random.rand(dims) - 0.5) * 0.1)
            lineData[:, index] = lineData[:, index - 1] + step

        return lineData


    def update_lines(num, dataLines, lines):
        for line, data in zip(lines, dataLines):
            # NOTE: there is no .set_data() for 3 dim data...
            line.set_data(data[0:2, :num])
            line.set_3d_properties(data[2, :num])
        return lines

    # Attaching 3D axis to the figure
    fig = plt.figure()
    ax = p3.Axes3D(fig)

    # Fifty lines of random 3-D lines
    data = [Gen_RandLine(25, 3) for index in range(50)]

    # Creating fifty line objects.
    # NOTE: Can't pass empty arrays into 3d version of plot()
    lines = [ax.plot(dat[0, 0:1], dat[1, 0:1], dat[2, 0:1])[0] for dat in data]

    # Setting the axes properties
    ax.set_xlim3d([0.0, 1.0])
    ax.set_xlabel('X')

    ax.set_ylim3d([0.0, 1.0])
    ax.set_ylabel('Y')

    ax.set_zlim3d([0.0, 1.0])
    ax.set_zlabel('Z')

    ax.set_title('3D Test')

    # Creating the Animation object
    line_ani = animation.FuncAnimation(fig, update_lines, 25, fargs=(data, lines),
                                       interval=50, blit=False)

    plt.show()

**Total running time of the script:** ( 0 minutes  0.071 seconds)



.. container:: sphx-glr-footer


  .. container:: sphx-glr-download

     :download:`Download Python source code: simple_3danim.py <simple_3danim.py>`



  .. container:: sphx-glr-download

     :download:`Download Jupyter notebook: simple_3danim.ipynb <simple_3danim.ipynb>`

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

    `Generated by Sphinx-Gallery <https://sphinx-gallery.readthedocs.io>`_
