I'm new to 3d plotting. I just want to build a pyramid out of 5 Points and cut a plane through it. My problem is I don't know how to fill the sides.
points = np.array([[-1, -1, -1],
[1, -1, -1 ],
[1, 1, -1],
[-1, 1, -1],
[0, 0 , 1]])
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
r = [-1,1]
X, Y = np.meshgrid(r, r)
ax.plot_surface(X,Y,-1, alpha=0.5)
ax.plot_surface(X,Y,0.5, alpha=0.5, facecolors='r')
ax.scatter3D(points[:, 0], points[:, 1], points[:, 2])
ax.set_xlabel('X')
ax.set_ylabel('Y')
ax.set_zlabel('Z')
plt.show()
Any help is appreciated.
You have to use polygons:
from matplotlib import pyplot as plt
from mpl_toolkits.mplot3d.art3d import Poly3DCollection, Line3DCollection
import numpy as np
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
# vertices of a pyramid
v = np.array([[-1, -1, -1], [1, -1, -1], [1, 1, -1], [-1, 1, -1], [0, 0, 1]])
ax.scatter3D(v[:, 0], v[:, 1], v[:, 2])
# generate list of sides' polygons of our pyramid
verts = [ [v[0],v[1],v[4]], [v[0],v[3],v[4]],
[v[2],v[1],v[4]], [v[2],v[3],v[4]], [v[0],v[1],v[2],v[3]]]
# plot sides
ax.add_collection3d(Poly3DCollection(verts,
facecolors='cyan', linewidths=1, edgecolors='r', alpha=.25))
plt.show()
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