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46 lines
1.5 KiB
Markdown
46 lines
1.5 KiB
Markdown
# Frontpage 3D示例
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此示例再现Frontpage 3D示例。
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```python
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# This import registers the 3D projection, but is otherwise unused.
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from mpl_toolkits.mplot3d import Axes3D # noqa: F401 unused import
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from matplotlib import cbook
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from matplotlib import cm
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from matplotlib.colors import LightSource
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import matplotlib.pyplot as plt
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import numpy as np
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filename = cbook.get_sample_data('jacksboro_fault_dem.npz', asfileobj=False)
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with np.load(filename) as dem:
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z = dem['elevation']
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nrows, ncols = z.shape
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x = np.linspace(dem['xmin'], dem['xmax'], ncols)
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y = np.linspace(dem['ymin'], dem['ymax'], nrows)
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x, y = np.meshgrid(x, y)
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region = np.s_[5:50, 5:50]
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x, y, z = x[region], y[region], z[region]
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fig, ax = plt.subplots(subplot_kw=dict(projection='3d'))
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ls = LightSource(270, 45)
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# To use a custom hillshading mode, override the built-in shading and pass
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# in the rgb colors of the shaded surface calculated from "shade".
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rgb = ls.shade(z, cmap=cm.gist_earth, vert_exag=0.1, blend_mode='soft')
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surf = ax.plot_surface(x, y, z, rstride=1, cstride=1, facecolors=rgb,
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linewidth=0, antialiased=False, shade=False)
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ax.set_xticks([])
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ax.set_yticks([])
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ax.set_zticks([])
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fig.savefig("surface3d_frontpage.png", dpi=25) # results in 160x120 px image
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```
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## 下载这个示例
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- [下载python源码: 3D.py](https://matplotlib.org/_downloads/3D.py)
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- [下载Jupyter notebook: 3D.ipynb](https://matplotlib.org/_downloads/3D.ipynb)
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