ConvertFixed.py

#!/usr/bin/env python3
import sys

def main():
    if(len(sys.argv) < 3):
        print("convert.py <file.in> <file.out>")
        return 0

    f = open(sys.argv[1], "r")
    mode = "header"
    num_verts = 0
    verts = []
    faces = []
    for line in f:
        if mode == "header":
            if line.strip() == "3DGI" or line.strip() == "3DG1":
                mode = "vert"
            else:
                print("Invalid header")

        elif mode == "vert":
            num_verts = int(line.strip())
            mode = "read_verts"
        elif mode == "read_verts":
            vert = line.strip().split()
            vert[0] = float(vert[0])
            vert[1] = float(vert[1])
            vert[2] = float(vert[2])
            verts.append(vert)
            num_verts -= 1
            if(num_verts == 0):
                mode = "read_faces"
        elif mode == "read_faces":
            face = line.strip().split()
            for i in range(len(face)):
                try:
                    face[i] = int(face[i])
                except ValueError:
                    print("Done")

            faces.append(face)

    f.close()

    f = open(sys.argv[2], "w")
    for v in verts:
        f.write("v {} {} {} 1\n".format(v[0], v[1], v[2]))

    for face in faces:

        if len(face) <= 1:
            continue

        f.write("f")
        for ff in face[1:-1]:
            f.write(" {}".format(ff+1))
        f.write("\n")

    f.close()
    return 0

if __name__ == "__main__":
    sys.exit(main())