matplotlib.github.com/3.5.1/gallery/mplot3d/voxels.py at main · matplotlib/matplotlib.github.com · GitHub

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"""

==========================

3D voxel / volumetric plot

==========================

Demonstrates plotting 3D volumetric objects with `.Axes3D.voxels`.

"""

import matplotlib.pyplot as plt

import numpy as np

# prepare some coordinates

x, y, z = np.indices((8, 8, 8))

# draw cuboids in the top left and bottom right corners, and a link between

# them

cube1 = (x < 3) & (y < 3) & (z < 3)

cube2 = (x >= 5) & (y >= 5) & (z >= 5)

link = abs(x - y) + abs(y - z) + abs(z - x) <= 2

# combine the objects into a single boolean array

voxelarray = cube1 | cube2 | link

# set the colors of each object

colors = np.empty(voxelarray.shape, dtype=object)

colors[link] = 'red'

colors[cube1] = 'blue'

colors[cube2] = 'green'

# and plot everything

ax = plt.figure().add_subplot(projection='3d')

ax.voxels(voxelarray, facecolors=colors, edgecolor='k')

plt.show()

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