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import sys 

import random 

import argparse 

 

from . import stl 

 

 

def _get_parser(description): 

parser = argparse.ArgumentParser(description=description) 

parser.add_argument('infile', nargs='?', type=argparse.FileType('rb'), 

default=sys.stdin, help='STL file to read') 

parser.add_argument('outfile', nargs='?', type=argparse.FileType('wb'), 

default=sys.stdout, help='STL file to write') 

parser.add_argument('--name', nargs='?', help='Name of the mesh') 

parser.add_argument( 

'-n', '--use-file-normals', action='store_true', 

help='Read the normals from the file instead of recalculating them') 

parser.add_argument( 

'-r', '--remove-empty-areas', action='store_true', 

help='Remove areas with 0 surface areas to prevent errors during ' 

'normal calculation') 

parser.add_argument('-s', '--disable-speedups', action='store_true', 

help='Disable Cython speedups') 

return parser 

 

 

def _get_name(args): 

names = [ 

args.name, 

getattr(args.outfile, 'name', None), 

getattr(args.infile, 'name', None), 

'numpy-stl-%06d' % random.randint(0, 1e6), 

] 

 

for name in names: # pragma: no branch 

if name and isinstance(name, str) and not name.startswith('<'): 

return name 

 

 

def main(): 

parser = _get_parser('Convert STL files from ascii to binary and back') 

parser.add_argument('-a', '--ascii', action='store_true', 

help='Write ASCII file (default is binary)') 

parser.add_argument('-b', '--binary', action='store_true', 

help='Force binary file (for TTYs)') 

 

args = parser.parse_args() 

name = _get_name(args) 

stl_file = stl.StlMesh(filename=name, 

fh=args.infile, 

calculate_normals=False, 

remove_empty_areas=args.remove_empty_areas, 

speedups=not args.disable_speedups) 

 

if args.binary: 

mode = stl.BINARY 

elif args.ascii: 

mode = stl.ASCII 

else: 

mode = stl.AUTOMATIC 

 

stl_file.save(name, args.outfile, mode=mode, 

update_normals=not args.use_file_normals) 

 

 

def to_ascii(): 

parser = _get_parser('Convert STL files to ASCII (text) format') 

args = parser.parse_args() 

name = _get_name(args) 

stl_file = stl.StlMesh(filename=name, fh=args.infile, 

calculate_normals=False, 

remove_empty_areas=args.remove_empty_areas, 

speedups=not args.disable_speedups) 

stl_file.save(name, args.outfile, mode=stl.ASCII, 

update_normals=not args.use_file_normals) 

 

 

def to_binary(): 

parser = _get_parser('Convert STL files to ASCII (text) format') 

args = parser.parse_args() 

name = _get_name(args) 

stl_file = stl.StlMesh(filename=name, fh=args.infile, 

calculate_normals=False, 

remove_empty_areas=args.remove_empty_areas, 

speedups=not args.disable_speedups) 

stl_file.save(name, args.outfile, mode=stl.BINARY, 

update_normals=not args.use_file_normals)