我不太明白。

cgalMeshes包允许从PLY文件中读取网格，并允许计算网格的边界框（包含网格的最小等长方体）。这里有一个例子。

library(cgalMeshes)
# load the cyclide.ply file into a new mesh
mesh <- cgalMesh$new("cyclide.ply")
# compute its bounding box
bbox <- mesh$boundingBox()
# make a mesh of the bounding box in order to plot it
bxmesh <- isoCuboidMesh(bbox[["lcorner"]], bbox[["ucorner"]])
# convert the mesh of the cyclide to a rgl mesh
rmesh <- mesh$getMesh()
# plot the cyclide with its bounding box
library(rgl)
open3d(windowRect = 50 + c(0, 0, 512, 512))
view3d(0, -60)
shade3d(rmesh, color = "gold")
wire3d(bxmesh, color = "black")

我刚刚发现如何在Python中做到这一点：

import os
import trimesh
folder_path = "C:/..."
# Iterate over files in folder
for filename in os.listdir(folder_path):
    # Check if file is a PLY file
    if filename.endswith(".ply"):
        file_path = os.path.join(folder_path, filename)
        # Load mesh from file
        mesh = trimesh.load(file_path)
        # Get bounding box dimensions
        bbox_dim = mesh.bounding_box.extents
        # Print results
        print(f"{filename}: Height={bbox_dim[2]}")

它就像一个魅力！