| """ | |
| ========================== | |
| 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() | |