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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

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<title>Draw flat objects in 3D plot — Matplotlib 2.2.2 documentation</title>

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Note

Click <a class="reference internal" href="#sphx-glr-download-gallery-mplot3d-pathpatch3d-py">here</a> to download the full example code

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<h1>Draw flat objects in 3D plot<a class="headerlink" href="#draw-flat-objects-in-3d-plot" title="Permalink to this headline">¶</a></h1>

Demonstrate using pathpatch_2d_to_3d to ‘draw’ shapes and text on a 3D plot.

<div class="highlight-python notranslate"><div class="highlight"><pre>import numpy as np

import matplotlib.pyplot as plt

from matplotlib.patches import <a href="../../api/_as_gen/matplotlib.patches.Circle.html#matplotlib.patches.Circle" title="View documentation for matplotlib.patches.Circle">Circle</a>, <a href="../../api/_as_gen/matplotlib.patches.PathPatch.html#matplotlib.patches.PathPatch" title="View documentation for matplotlib.patches.PathPatch">PathPatch</a>

# 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 <a href="../../api/transformations.html#matplotlib.transforms.Affine2D" title="View documentation for matplotlib.transforms.Affine2D">Affine2D</a>

def text3d(ax, xyz, s, zdir="z", size=None, angle=0, usetex=False, **kwargs):

'''

Plots the string 's' on the axes 'ax', with position 'xyz', size 'size',

and rotation angle 'angle'. 'zdir' gives the axis which is to be treated

as the third dimension. usetex is a boolean indicating whether the string

should be interpreted as latex or not. Any additional keyword arguments

are passed on to transform_path.

Note: zdir affects the interpretation of xyz.

'''

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 = <a href="../../api/transformations.html#matplotlib.transforms.Affine2D" title="View documentation for matplotlib.transforms.Affine2D">Affine2D</a>().rotate(angle).translate(xy1[0], xy1[1])

p1 = <a href="../../api/_as_gen/matplotlib.patches.PathPatch.html#matplotlib.patches.PathPatch" title="View documentation for matplotlib.patches.PathPatch">PathPatch</a>(trans.transform_path(text_path), **kwargs)

ax.add_patch(p1)

art3d.pathpatch_2d_to_3d(p1, z=z1, zdir=zdir)

fig = <a href="../../api/_as_gen/matplotlib.pyplot.figure.html#matplotlib.pyplot.figure" title="View documentation for matplotlib.pyplot.figure">plt.figure</a>()

ax = fig.add_subplot(111, projection='3d')

# Draw a circle on the x=0 'wall'

p = <a href="../../api/_as_gen/matplotlib.patches.Circle.html#matplotlib.patches.Circle" title="View documentation for matplotlib.patches.Circle">Circle</a>((5, 5), 3)

ax.add_patch(p)

art3d.pathpatch_2d_to_3d(p, z=0, zdir="x")

# Manually label the axes

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=np.pi / 2, ec="none", fc="k")

text3d(ax, (12, 10, 4), "Z-axis", zdir="y", size=.5, usetex=False,

# Write a Latex formula on the z=0 'floor'

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,

ax.set_xlim(0, 10)

ax.set_ylim(0, 10)

ax.set_zlim(0, 10)

<a href="../../api/_as_gen/matplotlib.pyplot.show.html#matplotlib.pyplot.show" title="View documentation for matplotlib.pyplot.show">plt.show</a>()

</pre></div>

</div>

<a class="reference download internal" href="../../_downloads/pathpatch3d.py" download=""><code class="xref download docutils literal notranslate">Download Python source code: pathpatch3d.py</code></a></div>

<a class="reference download internal" href="../../_downloads/pathpatch3d.ipynb" download=""><code class="xref download docutils literal notranslate">Download Jupyter notebook: pathpatch3d.ipynb</code></a></div>

</div>

Keywords: matplotlib code example, codex, python plot, pyplot

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