a = open('../blendswapdrums2-simplified.obj').read()
b = a.split('\no ')
c = ['o ' + i for i in b[1:]]

def normalize(block, offset):
    u = block.split('\n')
    vertices = [i for i in u if len(i) >= 2 and i[:2] == 'v ']
    faces = [i for i in u if len(i) >= 2 and i[:2] == 'f ']

    def normalize_face(i):
        _, p, q, r = i.split(' ')
        return f'f {int(p)-offset} {int(q)-offset} {int(r)-offset}'

    normalized_faces = [normalize_face(i) for i in faces]
    normalized_block = '\n'.join(vertices + normalized_faces)
    new_offset = offset + len(vertices)
    
    return normalized_block, new_offset
    
offset = 0
for i in c:
    fnam = i[2:i.index('\n')]
    content, offset = normalize(i, offset)
    print(offset)
    with open(fnam + '.piece', 'w') as f:
        f.write(content)
        

# % echo *.piece
# '{' + ', '.join(f'"{i}"' for i in t) + '}'
# t=s.split(' ')