#!python
# -*- mode: python; Encoding: utf-8; coding: utf-8 -*-
# Last updated: <2024/05/05 06:47:31 +0900>
"""
csv to line obj

csvファイルを読み込んで、
連続した直線データが記述されたWavefront obj形式で出力する。

Usage:
    python csv2lineobj.py -i INPUT.csv > OUTPUT.obj

Windows10 x64 22H2 + Python 3.10.10 64bit
scipy 1.13.0 + numpy 1.26.4
"""

import argparse
import sys

# import re
# import numpy as np
# from scipy import interpolate


def load_csv(infile):
    ret = []
    with open(infile, "r") as file:
        for line in file:
            line = line.rstrip()
            s = line.split(",")
            ret.append([float(s[0]), float(s[1])])
    return ret


def dump_obj(data, revz):
    print("o linedata")
    for v in data:
        x, z = v
        if revz:
            z *= -1
        print(f"v {x} 0.0 {z}")

    for i in range(len(data) - 1):
        i0 = i + 1
        i1 = i + 2
        print(f"l {i0} {i1}")


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("-i", "--input", required=True, help="Input csv file")
    parser.add_argument("--revz", action="store_false", help="reverse z")
    args = parser.parse_args()

    if args.input is None:
        sys.exit()

    data = load_csv(args.input)
    dump_obj(data, args.revz)


if __name__ == "__main__":
    main()