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42 lines
1.2 KiB
Markdown
42 lines
1.2 KiB
Markdown
# 三角三维曲面
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用三角形网格绘制3D表面。
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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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import matplotlib.pyplot as plt
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import numpy as np
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n_radii = 8
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n_angles = 36
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# Make radii and angles spaces (radius r=0 omitted to eliminate duplication).
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radii = np.linspace(0.125, 1.0, n_radii)
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angles = np.linspace(0, 2*np.pi, n_angles, endpoint=False)[..., np.newaxis]
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# Convert polar (radii, angles) coords to cartesian (x, y) coords.
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# (0, 0) is manually added at this stage, so there will be no duplicate
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# points in the (x, y) plane.
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x = np.append(0, (radii*np.cos(angles)).flatten())
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y = np.append(0, (radii*np.sin(angles)).flatten())
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# Compute z to make the pringle surface.
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z = np.sin(-x*y)
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fig = plt.figure()
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ax = fig.gca(projection='3d')
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ax.plot_trisurf(x, y, z, linewidth=0.2, antialiased=True)
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plt.show()
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```
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## 下载这个示例
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- [下载python源码: trisurf3d.py](https://matplotlib.org/_downloads/trisurf3d.py)
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- [下载Jupyter notebook: trisurf3d.ipynb](https://matplotlib.org/_downloads/trisurf3d.ipynb) |