.. _mplot3d-pathpatch3d_demo:

mplot3d example code: pathpatch3d_demo.py
=========================================



.. plot:: /builddir/build/BUILD/matplotlib-1.2.0/doc/mpl_examples/mplot3d/pathpatch3d_demo.py

::

    import matplotlib.pyplot as plt
    from matplotlib.patches import Circle, PathPatch
    # register Axes3D class with matplotlib by importing Axes3D
    from mpl_toolkits.mplot3d import Axes3D
    import mpl_toolkits.mplot3d.art3d as art3d
    from matplotlib.text import TextPath
    from matplotlib.transforms import Affine2D
    
    
    def text3d(ax, xyz, s, zdir="z", size=None, angle=0, usetex=False, **kwargs):
    
        x, y, z = xyz
        if zdir == "y":
            xy1, z1 = (x, z), y
        elif zdir == "y":
            xy1, z1 = (y, z), x
        else:
            xy1, z1 = (x, y), z
    
        text_path = TextPath((0, 0), s, size=size, usetex=usetex)
        trans = Affine2D().rotate(angle).translate(xy1[0], xy1[1])
    
        p1 = PathPatch(trans.transform_path(text_path), **kwargs)
        ax.add_patch(p1)
        art3d.pathpatch_2d_to_3d(p1, z=z1, zdir=zdir)
    
    
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    
    p = Circle((5, 5), 3)
    ax.add_patch(p)
    art3d.pathpatch_2d_to_3d(p, z=0, zdir="x")
    
    
    text3d(ax, (4, -2, 0), "X-axis", zdir="z", size=.5, usetex=False,
           ec="none", fc="k")
    text3d(ax, (12, 4, 0), "Y-axis", zdir="z", size=.5, usetex=False,
           angle=.5*3.14159, ec="none", fc="k")
    text3d(ax, (12, 10, 4), "Z-axis", zdir="y", size=.5, usetex=False,
           angle=.5*3.14159, ec="none", fc="k")
    
    text3d(ax, (1, 5, 0),
           r"$\displaystyle G_{\mu\nu} + \Lambda g_{\mu\nu} = "
           r"\frac{8\pi G}{c^4} T_{\mu\nu}  $",
           zdir="z", size=1, usetex=True,
           ec="none", fc="k")
    
    ax.set_xlim3d(0, 10)
    ax.set_ylim3d(0, 10)
    ax.set_zlim3d(0, 10)
    
    plt.show()
    

Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)