pyvista可视化加强版

增加了一个随机按钮，可以即时切换case可视化

import os
import glob
import random

import pyvista as pv


def display_multi_meshes(meshes: list, titles=None, point_size=3, opacity=0.9):
    num = len(meshes)
    for i in range(num):
        pl.subplot(0, i)
        if i == 2:</