python trimesh怎么画六边形柱体

要使用trimesh库画六边形柱体，可以先创建一个六边形的底面，然后通过extrude方法将其拉伸成柱体。具体代码如下：

import trimesh
import numpy as np

# 创建六边形底面
radius = 1.0
height = 2.0
num_sides = 6
theta = np.linspace(0, 2*np.pi, num_sides+1)[:-1]
bottom_face = np.column_stack((radius*np.cos(theta), radius*np.sin(theta), np.zeros(num_sides)))

# 拉伸成柱体
mesh = trimesh.Trimesh()
mesh.vertices = np.vstack((bottom_face, bottom_face + [0, 0, height]))
mesh.faces = np.vstack((np.column_stack((np.arange(num_sides), np.roll(np.arange(num_sides), -1))),
                        np.column_stack((np.arange(num_sides, 2*num_sides), np.roll(np.arange(num_sides, 2*num_sides), -1))),
                        np.column_stack((np.arange(num_sides), np.arange(num_sides, 2*num_sides)))))
mesh.visual.face_colors = [100, 100, 100, 255]

# 显示结果
scene = mesh.scene()
scene.show()