113 lines
3.7 KiB
Python
113 lines
3.7 KiB
Python
import os
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import logging
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import platform
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import subprocess
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from string import Template
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from tempfile import NamedTemporaryFile
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from subprocess import check_call
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from .. import exchange
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# create a default logger
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log = logging.getLogger('trimesh.interfaces')
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class MeshScript:
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def __init__(self,
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meshes,
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script,
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exchange='stl',
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debug=False,
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**kwargs):
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self.debug = debug
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self.kwargs = kwargs
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self.meshes = meshes
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self.script = script
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self.exchange = exchange
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def __enter__(self):
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# windows has problems with multiple programs using open files so we close
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# them at the end of the enter call, and delete them ourselves at the
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# exit
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self.mesh_pre = [
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NamedTemporaryFile(
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suffix='.{}'.format(
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self.exchange),
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mode='wb',
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delete=False) for i in self.meshes]
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self.mesh_post = NamedTemporaryFile(
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suffix='.{}'.format(
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self.exchange),
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mode='rb',
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delete=False)
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self.script_out = NamedTemporaryFile(mode='wb',
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delete=False)
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# export the meshes to a temporary STL container
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for mesh, file_obj in zip(self.meshes, self.mesh_pre):
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mesh.export(file_obj.name)
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self.replacement = {'MESH_' + str(i): m.name
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for i, m in enumerate(self.mesh_pre)}
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self.replacement['MESH_PRE'] = str(
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[i.name for i in self.mesh_pre])
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self.replacement['MESH_POST'] = self.mesh_post.name
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self.replacement['SCRIPT'] = self.script_out.name
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script_text = Template(self.script).substitute(self.replacement)
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if platform.system() == 'Windows':
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script_text = script_text.replace('\\', '\\\\')
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self.script_out.write(script_text.encode('utf-8'))
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# close all temporary files
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self.script_out.close()
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self.mesh_post.close()
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for file_obj in self.mesh_pre:
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file_obj.close()
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return self
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def run(self, command):
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command_run = Template(command).substitute(
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self.replacement).split()
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# run the binary
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# avoid resourcewarnings with null
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with open(os.devnull, 'w') as devnull:
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startupinfo = None
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if platform.system() == 'Windows':
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startupinfo = subprocess.STARTUPINFO()
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startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
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if self.debug:
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# in debug mode print the output
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stdout = None
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else:
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stdout = devnull
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if self.debug:
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log.info('executing: {}'.format(' '.join(command_run)))
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check_call(command_run,
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stdout=stdout,
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stderr=subprocess.STDOUT,
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startupinfo=startupinfo)
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# bring the binaries result back as a set of Trimesh kwargs
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mesh_results = exchange.load.load_mesh(self.mesh_post.name,
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**self.kwargs)
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return mesh_results
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def __exit__(self, *args, **kwargs):
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if self.debug:
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log.info('MeshScript.debug: not deleting {}'.format(
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self.script_out.name))
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return
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# delete all the temporary files by name
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# they are closed but their names are still available
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os.remove(self.script_out.name)
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for file_obj in self.mesh_pre:
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os.remove(file_obj.name)
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os.remove(self.mesh_post.name)
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