倾斜摄影osgb格式文件，进行坐标转换

# -*- coding: utf-8 -*-
import pyproj

# 初始化坐标系转换器
transformer = pyproj.Transformer.from_crs("EPSG:4528", "EPSG:4326", always_xy=True)

with open('input.obj', 'r') as infile, open('output.obj', 'w') as outfile:
    for line in infile:
        if line.startswith('v '):  # 处理顶点信息
            parts = line.split()
            x, y, z = map(float, parts[1:4])
            # 执行坐标系转换
            x, y = transformer.transform(x, y)
            outfile.write(f"v {x} {y} {z}\n")
        else:
            outfile.write(line)