今天在分离.obj模型数据时，遇到一个问题，就是每行数据存在换行符，导致末尾添加的符号出现在下一行的行首。因此，需要先删除末尾的换行符，再添加符号。
知识点
replace(a,b) 将a替换为b，比如，replace("\n"," ") ，换行符替换为空格
obj 文件数据
１. v 顶点坐标
２. vt 纹理坐标
３. vn 顶点法向量
４. f 面，包含顶点索引，格式：v/vt/vn
#!/usr/bin/env python3
# encoding: utf-8
# coding style: pep8
# ====================================================
# Copyright (C)2020 All rights reserved.
#
# Author : xxx
# Email : [email protected]
# File Name : parse_obj.py
# Last Modified : 2020-07-10 20:02
# Description :
#
# ====================================================
import sys
import os
import numpy as np
objFilePath = 'particles.obj'
f_v = open("./v.txt", "w")
f_v.seek(0)
f_v.truncate() # 清空文件
f_vt = open("./vt.txt", "w")
f_vt.seek(0)
f_vt.truncate() # 清空文件
f_f = open("./f.txt", "w")
f_f.seek(0)
f_f.truncate() # 清空文件
with open(objFilePath) as file:
points = []
while 1:
line = file.readline()
if not line:
break
strs = line.split(" ")
if strs[0] == "v":
tmp = strs[1]+","+strs[2]+","+strs[3].replace("\n","")+','
f_v.write(tmp)
if strs[0] == "vt":
tmp = strs[1]+","+strs[2].replace("\n","")+','
f_vt.write(tmp)
if strs[0] =="f":
tmp = str(int(strs[1].split("/")[0])-1)+","+str(int(strs[2].split("/")[0])-1)+","+str(int(strs[3].split("/")[0])-1)+","
f_f.write(tmp)