matplotlib/examples/mplot3d/trisurf3d_demo.py at string-func-parser · alvarosg/matplotlib · GitHub

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'''

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

Triangular 3D surfaces

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

Plot a 3D surface with a triangular mesh.

'''

from mpl_toolkits.mplot3d import Axes3D

import matplotlib.pyplot as plt

import numpy as np

n_radii = 8

n_angles = 36

# Make radii and angles spaces (radius r=0 omitted to eliminate duplication).

radii = np.linspace(0.125, 1.0, n_radii)

angles = np.linspace(0, 2*np.pi, n_angles, endpoint=False)

# Repeat all angles for each radius.

angles = np.repeat(angles[..., np.newaxis], n_radii, axis=1)

# Convert polar (radii, angles) coords to cartesian (x, y) coords.

# (0, 0) is manually added at this stage, so there will be no duplicate

# points in the (x, y) plane.

x = np.append(0, (radii*np.cos(angles)).flatten())

y = np.append(0, (radii*np.sin(angles)).flatten())

# Compute z to make the pringle surface.

z = np.sin(-x*y)

fig = plt.figure()

ax = fig.gca(projection='3d')

ax.plot_trisurf(x, y, z, linewidth=0.2, antialiased=True)

plt.show()