错误的BoundingBox维提取pythonocc

如何解决错误的BoundingBox维提取pythonocc

我正在尝试从STP文件中提取盒子尺寸，并且它适用于某些示例，但是不幸的是，我在其他压缩后的STP文件中提取了错误的示例

https://github.com/tpaviot/pythonocc-demos/files/5272793/Test.zip

我得到了“ x”的结果值：6.802000200000001 但是正确的值是6.24，以此类推，y和z值依此类推。

这是我的代码

from future import print_function

from OCC.Extend.DataExchange import read_step_file
from OCC.Core.IFSelect import IFSelect_RetDone
from OCC.Core.Bnd import Bnd_Box
from OCC.Core.BRepBndLib import brepbndlib_Add
from OCC.Core.BRepMesh import BRepMesh_IncrementalMesh
from OCC.Core.STEPControl import STEPControl_Reader

shapes = read_step_file('path/to/stpfile')

def read_stp_file(file_path):
step_reader = STEPControl_Reader()
status = step_reader.ReadFile(file_path)
if status == IFSelect_RetDone:
fails_only = False
step_reader.TransferRoots()
shape = step_reader.Shape(1)
return shape
else:
print("Error: can't read file.")

bBox = Bnd_Box()

use_mesh = True
mesh = BRepMesh_IncrementalMesh()
mesh.SetParallelDefault(True)
mesh.SetShape(shapes)
mesh.Perform()
assert mesh.IsDone()
brepbndlib_Add(shapes,bBox,use_mesh)
xmin,ymin,zmin,xmax,ymax,zmax = bBox.Get()
print('x value : >>>> ',xmax - xmin)