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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
$Id$

Copyright 2010 Lars Kruse <devel@sumpfralle.de>
Copyright 2008-2009 Lode Leroy

This file is part of PyCAM.

PyCAM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

PyCAM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with PyCAM.  If not, see <http://www.gnu.org/licenses/>.
"""

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# extend the PYTHONPATH to include the "src" directory
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import sys
import os
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BASE_DIR = os.path.dirname(os.path.realpath(__file__))
sys.path.insert(0, os.path.join(BASE_DIR, "src"))
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# register the glut32.dll manually for the pyinstaller standalone executable
if hasattr(sys, "frozen") and sys.frozen and "_MEIPASS2" in os.environ:
    from ctypes import windll
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    windll[os.path.join(os.path.normpath(os.environ["_MEIPASS2"]),
            "glut32.dll")]
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import pycam.Gui.common as GuiCommon
import pycam.Gui.Settings
import pycam.Gui.Console
import pycam.Importers.TestModel
import pycam.Importers
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import pycam.Exporters.GCodeExporter
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import pycam.Toolpath.Generator
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import pycam.Utils.threading
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import pycam.Utils
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from pycam.Toolpath import Bounds, Toolpath
from pycam import VERSION
import pycam.Utils.log
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from optparse import OptionParser
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import socket
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import warnings
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import logging
import time
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# we need to import gtk.Warning to silence these warnings later
#import gtk
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# we need the multiprocessing exception for remote connections
try:
    import multiprocessing
except ImportError:
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    class multiprocessing(object):
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        # use an arbitrary other Exception
        AuthenticationError = socket.error


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# The installer for PyODE does not add the required PATH variable.
if pycam.Utils.get_platform() == pycam.Utils.PLATFORM_WINDOWS:
    os.environ["PATH"] = os.environ.get("PATH", "") + os.path.pathsep + sys.exec_prefix
# The GtkGLExt installer does not add the required PATH variable. 
if pycam.Utils.get_platform() == pycam.Utils.PLATFORM_WINDOWS:
    import _winreg
    path = None
    try:
        reg = _winreg.ConnectRegistry(None, _winreg.HKEY_LOCAL_MACHINE)
        regkey = _winreg.OpenKey(reg, r"SOFTWARE\GtkGLExt\1.0\Runtime")
    except WindowsError:
        regkey = None
    index = 0
    while regkey:
        try:
            key, value = _winreg.EnumValue(regkey, index)[:2]
        except WindowsError:
            # no more items left
            break
        if key == "Path":
            path = os.path.join(str(value), "bin")
            break
        index += 1
    if path:
        os.environ["PATH"] = os.environ.get("PATH", "") + os.path.pathsep + path


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log = pycam.Utils.log.get_logger()

EXAMPLE_MODEL_LOCATIONS = [
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        os.path.join(BASE_DIR, "samples"),
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        os.path.join(sys.prefix, "share", "pycam", "samples"),
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        os.path.join(sys.prefix, "local", "share", "pycam", "samples"),
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        os.path.join("usr", "share", "pycam", "samples")]
# for pyinstaller (windows distribution)
if "_MEIPASS2" in os.environ:
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    EXAMPLE_MODEL_LOCATIONS.insert(0, os.path.join(os.path.normpath(
            os.environ["_MEIPASS2"]), "samples"))
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DEFAULT_MODEL_FILE = "pycam-textbox.stl"
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#DEFAULT_MODEL_FILE = "problem_1_triangle.stl"
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EXIT_CODES = {"ok": 0, "requirements": 1, "load_model_failed": 2,
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        "write_output_failed": 3, "parsing_failed": 4,
        "server_without_password": 5, "connection_error": 6}
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def show_gui(inputfile=None, task_settings_file=None):
    deps_gtk = GuiCommon.requirements_details_gtk()
    report_gtk = GuiCommon.get_dependency_report(deps_gtk, prefix="\t")
    if GuiCommon.check_dependencies(deps_gtk):
        from pycam.Gui.Project import ProjectGui
        gui_class = ProjectGui
    else:
        full_report = []
        full_report.append("PyCAM dependency problem")
        full_report.append("Error: Failed to load the GTK interface.")
        full_report.append("Details:")
        full_report.append(report_gtk)
        full_report.append("")
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        full_report.append("Detailed list of requirements: %s" % \
                GuiCommon.REQUIREMENTS_LINK)
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        log.critical(os.linesep.join(full_report))
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        return EXIT_CODES["requirements"]
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    gui = gui_class()

    # load the given model or the default
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    if not inputfile:
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        default_model = get_default_model()
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        if isinstance(default_model, (basestring, pycam.Utils.URIHandler)):
            gui.load_model_file(filename=default_model, store_filename=False)
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        else:
            gui.load_model(default_model)
    else:
        gui.load_model_file(filename=inputfile)

    # load task settings file
    if not task_settings_file is None:
        gui.open_task_settings_file(task_settings_file)

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    # tell the GUI to empty the "undo" queue
    gui.finish_startup()

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    # open the GUI
    gui.mainloop()
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    # no error -> return no error code
    return None
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def get_default_model():
    """ return a filename or a Model instance """
    # try to load the default model file ("pycam" logo)
    for inputdir in EXAMPLE_MODEL_LOCATIONS:
        inputfile = os.path.join(inputdir, DEFAULT_MODEL_FILE)
        if os.path.isfile(inputfile):
            return inputfile
    else:
        # fall back to the simple test model
        log.warn("Failed to find the default model (%s) in the " \
                "following locations: %s" % (DEFAULT_MODEL_FILE,
                        ", ".join(EXAMPLE_MODEL_LOCATIONS)))
        return pycam.Importers.TestModel.get_test_model()

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def load_model_file(filename, program_locations, unit=None):
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    uri = pycam.Utils.URIHandler(filename)
    if uri.is_local():
        uri = pycam.Utils.URIHandler(os.path.expanduser(str(filename)))
    if not uri.exists():
        log.warn("The input file ('%s') was not found!" % uri)
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        return None
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    importer = pycam.Importers.detect_file_type(uri)[1]
    model = importer(uri, program_locations=program_locations, unit=unit)
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    if model is None:
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        log.warn("Failed to load the model file (%s)." % uri)
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        return None
    else:
        return model

def get_output_handler(destination):
    if destination == "-":
        handler = sys.stdout
        closer = lambda: None
    else:
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        # support paths with a tilde (~)
        destination = os.path.expanduser(destination)
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        try:
            handler = open(destination, "w")
        except IOError, err_msg:
            log.error("Failed to open output file (%s) for writing: %s" \
                    % (destination, err_msg))
            return None, None
        closer = handler.close
    return (handler, closer)

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def execute(parser, opts, args, pycam):
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    # try to change the process name
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    pycam.Utils.setproctitle("pycam")
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    if len(args) > 0:
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        inputfile = pycam.Utils.URIHandler(args[0])
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    else:
        inputfile = None

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    if opts.debug:
        log.setLevel(logging.DEBUG)
    elif opts.quiet:
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        log.setLevel(logging.WARNING)
        # disable the progress bar
        opts.progress = "none"
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        # silence all warnings
        warnings.filterwarnings("ignore")
    else:
        # silence gtk warnings
        try:
            import gtk
            warnings.filterwarnings("ignore", category=gtk.Warning)
        except ImportError:
            pass
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    # show version and exit
    if opts.show_version:
        if opts.quiet:
            # print only the bare version number
            print VERSION
        else:
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            text = '''PyCAM %s
Copyright (C) 2008-2010 Lode Leroy
Copyright (C) 2010-2011 Lars Kruse

License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.''' % VERSION
            print text
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        return EXIT_CODES["ok"]
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    if not opts.disable_psyco:
        try:
            import psyco
            psyco.full()
            log.info("Psyco enabled")
        except ImportError:
            log.info("Psyco is not available (performance will probably " \
                    + "suffer slightly)")
    else:
        log.info("Psyco was disabled via the commandline")

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    # check if server-auth-key is given -> this is mandatory for server mode
    if (opts.enable_server or opts.start_server) and not opts.server_authkey:
        parser.error("You need to supply a shared secret for server mode. " \
                + "This is supposed to prevent you from exposing your host " \
                + "to remote access without authentication.\n" \
                + "Please add the '--server-auth-key' argument followed by " \
                + "a shared secret password.")
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        return EXIT_CODES["server_without_password"]
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    # initialize multiprocessing
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    try:
        if opts.start_server:
            pycam.Utils.threading.init_threading(opts.parallel_processes,
                    remote=opts.remote_server, run_server=True,
                    server_credentials=opts.server_authkey)
            pycam.Utils.threading.cleanup()
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            return EXIT_CODES["ok"]
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        else:
            pycam.Utils.threading.init_threading(opts.parallel_processes,
                    enable_server=opts.enable_server, remote=opts.remote_server,
                    server_credentials=opts.server_authkey)
    except socket.error, err_msg:
        log.error("Failed to connect to remote server: %s" % err_msg)
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        return EXIT_CODES["connection_error"]
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    except multiprocessing.AuthenticationError, err_msg:
        log.error("The remote server rejected your authentication key: %s" \
                % err_msg)
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        return EXIT_CODES["connection_error"]
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    # initialize the progress bar
    progress_styles = {"none": pycam.Gui.Console.ConsoleProgressBar.STYLE_NONE,
            "text": pycam.Gui.Console.ConsoleProgressBar.STYLE_TEXT,
            "bar": pycam.Gui.Console.ConsoleProgressBar.STYLE_BAR,
            "dot": pycam.Gui.Console.ConsoleProgressBar.STYLE_DOT,
    }
    progress_bar = pycam.Gui.Console.ConsoleProgressBar(sys.stdout,
            progress_styles[opts.progress])

    if opts.config_file:
        opts.config_file = os.path.expanduser(opts.config_file)

    if not opts.export_gcode and not opts.export_task_config:
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        result = show_gui(inputfile, opts.config_file)
        if not result is None:
            # deliver the error code to our caller
            return result
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    else:
        # generate toolpath
        tps = pycam.Gui.Settings.ToolpathSettings()
        tool_shape = {"cylindrical": "CylindricalCutter",
                "spherical": "SphericalCutter",
                "toroidal": "ToroidalCutter",
            }[opts.tool_shape]
        tps.set_tool(opts.tool_id, tool_shape, 0.5 * opts.tool_diameter,
                0.5 * opts.tool_torus_diameter, opts.tool_spindle_speed,
                opts.tool_feedrate)
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        if opts.support_type == "grid":
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            tps.set_support_grid(opts.support_grid_distance_x,
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                    opts.support_grid_distance_y,
                    opts.support_profile_thickness, opts.support_profile_height,
                    opts.support_grid_offset_x, opts.support_grid_offset_y)
        elif opts.support_type in ("distributed-edges", "distributed-corners"):
            start_at_corners = (opts.support_type == "distributed-corners")
            tps.set_support_distributed(opts.support_distributed_distance,
                    opts.support_distributed_minimum,
                    opts.support_profile_thickness, opts.support_profile_height,
                    opts.support_distributed_length,
                    start_at_corners=start_at_corners)
        elif opts.support_type == "none":
            pass
        else:
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            raise NotImplementedError, "Invalid support type specified: %s" % \
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                    opts.support_type
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        if opts.collision_engine == "ode":
            tps.set_calculation_backend("ODE")
        tps.set_unit_size(opts.unit_size)
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        path_generator, postprocessor = {
                "layer": ("PushCutter", "SimpleCutter"),
                "contour-follow": ("ContourFollow", "SimpleCutter"),
                "contour-polygon": ("PushCutter", "ContourCutter"),
                "surface": ("DropCutter", "PathAccumulator"),
                "engrave": ("EngraveCutter", "SimpleCutter"),
            }[opts.process_path_strategy]
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        tps.set_process_settings(path_generator, postprocessor,
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                opts.process_path_direction,
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                material_allowance=opts.process_material_allowance,
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                overlap_percent=opts.process_overlap_percent,
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                step_down=opts.process_step_down,
                engrave_offset=opts.process_engrave_offset,
                milling_style=opts.process_milling_style)
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        # set locations of external programs
        program_locations = {}
        if opts.external_program_inkscape:
            program_locations["inkscape"] = opts.external_program_inkscape
        if opts.external_program_pstoedit:
            program_locations["pstoedit"] = opts.external_program_pstoedit
        # load the model
        if inputfile is None:
            model = get_default_model()
            # the "get_default_model" function returns a string or a model
            if isinstance(model, basestring):
                model = load_model_file(model,
                        program_locations=program_locations,
                        unit=opts.unit_size)
        else:
            model = load_model_file(inputfile,
                    program_locations=program_locations, unit=opts.unit_size)
        if model is None:
            # something went wrong - we quit
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            return EXIT_CODES["load_model_failed"]
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        # calculate the processing boundary
        bounds = Bounds()
        bounds.set_reference(model.get_bounds())
        # set the bounds type and let the default bounding box match the model
        if opts.bounds_type == "relative-margin":
            bounds.set_type(Bounds.TYPE_RELATIVE_MARGIN)
            bounds_default_low = (0, 0, 0)
            bounds_default_high = (0, 0, 0)
        elif opts.bounds_type == "fixed-margin":
            bounds.set_type(Bounds.TYPE_FIXED_MARGIN)
            bounds_default_low = (0, 0, 0)
            bounds_default_high = (0, 0, 0)
        else:
            # custom boundary setting
            bounds.set_type(Bounds.TYPE_CUSTOM)
            bounds_default_low = (model.minx, model.miny, model.minz)
            bounds_default_high = (model.maxx, model.maxy, model.maxz)
        # TODO: use the optparse conversion callback instead
        def parse_triple_float(text):
            nums = text.split(",")
            if len(nums) != 3:
                return None
            result = []
            for num in nums:
                try:
                    result.append(float(num))
                except ValueError:
                    if num == "":
                        result.append(0.0)
                    else:
                        return None
            return result
        bounds_lower_nums = parse_triple_float(opts.bounds_lower)
        if opts.bounds_lower and not bounds_lower_nums:
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            parser.error("Failed to parse the lower boundary limit: %s" \
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                    % opts.bounds_lower)
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            return EXIT_CODES["parsing_failed"]
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        bounds_upper_nums = parse_triple_float(opts.bounds_upper)
        if opts.bounds_upper and not bounds_upper_nums:
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            parser.error("Failed to parse the upper boundary limit: %s" \
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                    % opts.bounds_upper)
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            return EXIT_CODES["parsing_failed"]
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        if bounds_lower_nums is None:
            bounds_lower_nums = bounds_default_low
        if bounds_upper_nums is None:
            bounds_upper_nums = bounds_default_high
        # both lower and upper bounds were specified
        bounds.set_bounds(bounds_lower_nums, bounds_upper_nums)
        # adjust the bounding box according to the "boundary_mode"
        if opts.boundary_mode == "along":
            offset = (0, 0, 0)
        elif opts.boundary_mode == "inside":
            offset = (-0.5 * opts.tool_diameter, -0.5 * opts.tool_diameter, 0)
        else:
            # "outside"
            offset = (0.5 * opts.tool_diameter, 0.5 * opts.tool_diameter, 0)
        process_bounds = Bounds(Bounds.TYPE_FIXED_MARGIN, offset, offset)
        process_bounds.set_reference(bounds)
        tps.set_bounds(process_bounds)
        if opts.export_gcode:
            # generate the toolpath
            start_time = time.time()
            toolpath = pycam.Toolpath.Generator.generate_toolpath_from_settings(
                    model, tps, callback=progress_bar.update)
            progress_bar.finish()
            log.info("Toolpath generation time: %f" \
                    % (time.time() - start_time))
            # write result
            if isinstance(toolpath, basestring):
                # an error occoured
                log.error(toolpath)
            else:
                description = "Toolpath generated via PyCAM v%s" % VERSION
                tp_obj = Toolpath(toolpath, description, tps)
                handler, closer = get_output_handler(opts.export_gcode)
                if handler is None:
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                    return EXIT_CODES["write_output_failed"]
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                generator = pycam.Exporters.GCodeExporter.GCodeGenerator(
                        handler, metric_units = (opts.unit_size == "mm"),
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                        safety_height=opts.safety_height,
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                        toggle_spindle_status=opts.gcode_no_start_stop_spindle,
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                        minimum_steps=[opts.gcode_minimum_step])
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                generator.set_speed(opts.tool_feedrate, opts.tool_spindle_speed)
                path_mode = opts.gcode_path_mode
                PATH_MODES = pycam.Exporters.GCodeExporter.PATH_MODES
                if (path_mode == "continuous") \
                        and (not opts.gcode_motion_tolerance is None):
                    if opts.gcode_naive_tolerance == 0:
                        naive_tolerance = None
                    else:
                        naive_tolerance = opts.gcode_naive_tolerance
                    generator.set_path_mode(PATH_MODES["continuous"],
                            opts.gcode_motion_tolerance, naive_tolerance)
                else:
                    generator.set_path_mode(PATH_MODES[opts.gcode_path_mode])
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                generator.add_moves(tp_obj.get_moves(opts.safety_height),
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                        comment=tp_obj.get_meta_data())
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                generator.finish()
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                closer()
        if opts.export_task_config:
            handler, closer = get_output_handler(opts.export_task_config)
            if handler is None:
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                return EXIT_CODES["write_output_failed"]
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            print >> handler, tps.get_string()
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            closer()
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    # no error -> don't return a specific exit code
    return None
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# define the commandline interface
if __name__ == "__main__":
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    # The PyInstaller standalone executable requires this "freeze_support" call.
    # Otherwise we will see a warning regarding an invalid argument called
    # "--multiprocessing-fork". This problem can be triggered on single-core
    # systems with these arguments: "--enable-server --server-auth-key foo".
    if hasattr(multiprocessing, "freeze_support"):
        multiprocessing.freeze_support()
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    parser = OptionParser(prog="PyCAM",
            usage="usage: pycam [options] [inputfile]\n\n" \
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                + "Start the PyCAM toolpath generator. Supplying one of " \
                + "the '--export-?' parameters will cause PyCAM to start " \
                + "in batch mode. Most parameters are useful only for " \
                + "batch mode.",
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            epilog="PyCAM website: http://pycam.sf.net")
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    group_general = parser.add_option_group("General options")
    group_export = parser.add_option_group("Export formats",
            "Export the resulting toolpath or meta-data in various formats. " \
            + "These options trigger the non-interactive mode. Thus the GUI " \
            + "is disabled.")
    group_tool = parser.add_option_group("Tool definition",
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            "Specify the tool parameters. The default tool is spherical and " \
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            + "has a diameter of 1 unit. The default speeds are 1000 " \
            + "units/minute (feedrate) and 250 (spindle rotations per minute)")
    group_process = parser.add_option_group("Process definition",
            "Specify the process parameters: toolpath strategy, layer height," \
            + " and others. A typical roughing operation is configured by " \
            + "default.")
    group_bounds = parser.add_option_group("Boundary definition",
            "Specify the outer limits of the processing area (x/y/z). " \
            + "You may choose between 'relative_margin' (margin is given as " \
            + "percentage of the respective model dimension), 'fixed_margin' " \
            + "(margin for each face given in absolute units of length) " \
            + "and 'custom' (absolute coordinates of the bounding box - " \
            + "regardless of the model size and position). Negative values " \
            + "are allowed and can make sense (e.g. negative margin).")
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    group_support_structure = parser.add_option_group("Support structure",
            "An optional support structure can be used to keep the object in " \
            + "place during the mill operation. The support structure can be " \
            + "removed manually afterwards. Various types of support " \
            + "structures are available. Support structures are disabled " \
            + "by default.")
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    group_gcode = parser.add_option_group("GCode settings",
            "Specify some details of the generated GCode.")
    group_external_programs = parser.add_option_group("External programs",
            "Some optional external programs are used for format conversions.")
    # general options
    group_general.add_option("-c", "--config", dest="config_file",
            default=None, action="store", type="string",
            help="load a task settings file")
    group_general.add_option("", "--unit", dest="unit_size",
            default="mm", action="store", type="choice",
            choices=["mm", "inch"], help="choose 'mm' or 'inch' for all " \
            + "numbers. By default 'mm' is assumed.")
    group_general.add_option("", "--collision-engine", dest="collision_engine",
            default="triangles", action="store", type="choice",
            choices=["triangles", "ode"],
            help="choose a specific collision detection engine. The default " \
                    + "is 'triangles'. Use 'help' to get a list of possible " \
                    + "engines.")
    group_general.add_option("", "--boundary-mode", dest="boundary_mode",
            default="along", action="store", type="choice",
            choices=["inside", "along", "outside"],
            help="specify if the mill tool (including its radius) should " \
                    + "move completely 'inside', 'along' or 'outside' the " \
                    + "defined processing boundary.")
    group_general.add_option("", "--disable-psyco", dest="disable_psyco",
            default=False, action="store_true", help="disable the Psyco " \
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                    + "just-in-time-compiler even if it is available")
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    group_general.add_option("", "--number-of-processes",
            dest="parallel_processes", default=None, type="int", action="store",
            help="override the default detection of multiple CPU cores. " \
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                    + "Parallel processing only works with Python 2.6 (or " \
                    + "later) or with the additional 'multiprocessing' " \
                    + "module.")
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    group_general.add_option("", "--enable-server", dest="enable_server",
            default=False, action="store_true", help="enable a local server " \
                    + "and (optionally) remote worker servers.")
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    group_general.add_option("", "--remote-server", dest="remote_server",
            default=None, action="store", type="string", help="Connect to a " \
                    + "remote task server to distribute the processing load. " \
                    + "The server is given as an IP or a hostname with an " \
                    + "optional port (default: 1250) separated by a colon.")
    group_general.add_option("", "--start-server-only", dest="start_server",
            default=False, action="store_true", help="Start only a local " \
                    + "server for handling remote requests.")
    group_general.add_option("", "--server-auth-key", dest="server_authkey",
            default="", action="store", type="string", help="Secret used for " \
                    + "connecting to a remote server or for granting access " \
                    + "to remote clients.")
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    group_general.add_option("-q", "--quiet", dest="quiet",
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            default=False, action="store_true", help="output only warnings " \
            + "and errors.")
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    group_general.add_option("-d", "--debug", dest="debug",
            default=False, action="store_true", help="enable output of debug " \
            + "messages.")
    group_general.add_option("", "--progress", dest="progress",
            default="text", action="store", type="choice",
            choices=["none", "text", "bar", "dot"],
            help="specify the type of progress bar used in non-GUI mode. " \
            + "The following options are available: text, none, bar, dot.")
    group_general.add_option("", "--profiling", dest="profile_destination",
            action="store", type="string",
            help="store profiling statistics in a file (only for debugging)")
    group_general.add_option("-v", "--version", dest="show_version",
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            default=False, action="store_true", help="output the current " \
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            + "version of PyCAM and exit")
    # export options
    group_export.add_option("", "--export-gcode", dest="export_gcode",
            default=None, action="store", type="string",
            help="export the generated toolpaths to a file")
    group_export.add_option("", "--export-task-config",
            dest="export_task_config", default=None, action="store",
            type="string",
            help="export the current task configuration (mainly for debugging)")
    # tool options
    group_tool.add_option("", "--tool-shape", dest="tool_shape",
            default="cylindrical", action="store", type="choice",
            choices=["cylindrical", "spherical", "toroidal"],
            help="tool shape for the operation (cylindrical, spherical, " \
            + "toroidal)")
    group_tool.add_option("", "--tool-size", dest="tool_diameter",
            default=1.0, action="store", type="float",
            help="diameter of the tool")
    group_tool.add_option("", "--tool-torus-size", dest="tool_torus_diameter",
            default=0.25, action="store", type="float",
            help="torus diameter of the tool (only for toroidal tool shape)")
    group_tool.add_option("", "--tool-feedrate", dest="tool_feedrate",
            default=1000, action="store", type="float",
            help="allowed movement velocity of the tool (units/minute)")
    group_tool.add_option("", "--tool-spindle-speed", dest="tool_spindle_speed",
            default=250, action="store", type="float",
            help="rotation speed of the tool (per minute)")
    group_tool.add_option("", "--tool-id", dest="tool_id",
            default=1, action="store", type="int",
            help="tool ID - to be used for tool selection via GCode " \
            + "(default: 1)")
    # process options
    group_process.add_option("", "--process-path-direction",
            dest="process_path_direction", default="x", action="store",
            type="choice", choices=["x", "y", "xy"],
            help="primary direction of the generated toolpath (x/y/xy)")
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    group_process.add_option("", "--process-path-strategy",
            dest="process_path_strategy", default="surface", action="store",
            type="choice", choices=["layer", "contour-follow",
                    "contour-polygon", "surface", "engrave"],
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            help="one of the available toolpath strategies (layer, surface, " \
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            + "contour-follow, contour-polygon, engrave)")
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    group_process.add_option("", "--process-material-allowance",
            dest="process_material_allowance", default=0.0, action="store",
            type="float", help="minimum distance between the tool and the " \
            + "object (for rough processing)")
    group_process.add_option("", "--process-step-down",
            dest="process_step_down", default=3.0, action="store", type="float",
            help="the maximum thickness of each processed material layer " \
            + "(only for 'layer' strategy)")
    group_process.add_option("", "--process-overlap-percent",
            dest="process_overlap_percent", default=0, action="store",
            type="int", help="how much should two adjacent parallel " \
            + "toolpaths overlap each other (0..99)")
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    group_process.add_option("", "--process-milling-style",
            dest="process_milling_style", default="ignore",
            action="store", type="choice",
            choices=["ignore", "conventional", "climb"],
            help="milling style (conventional / climb / ignore)")
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    group_process.add_option("", "--safety-height", dest="safety_height",
            default=25.0, action="store", type="float",
            help="height for safe re-positioning moves")
    group_process.add_option("", "--process-engrave-offset",
            dest="process_engrave_offset", default=0.0, action="store",
            type="float", help="engrave along the contour of a model with a " \
            + "given distance (only for 'engrave' strategy)")
    # bounds settings
    group_bounds.add_option("", "--bounds-type", dest="bounds_type",
            default="fixed-margin", action="store", type="choice",
            choices=["relative-margin", "fixed-margin", "custom"],
            help="type of the boundary definition (relative-margin, " \
            + "fixed-margin, custom)")
    group_bounds.add_option("", "--bounds-lower", dest="bounds_lower",
            default="", action="store", type="string",
            help="comma-separated x/y/z combination of the lower boundary " \
            + "(e.g. '4,4,-0.5')")
    group_bounds.add_option("", "--bounds-upper", dest="bounds_upper",
            default="", action="store", type="string",
            help="comma-separated x/y/z combination of the upper boundary " \
            + "(e.g. '12,5.5,0')")
    # support grid settings
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    group_support_structure.add_option("", "--support-type",
            dest="support_type", default="none", type="choice", action="store",
            choices=["none", "grid", "distributed-edges",
                    "distributed-corners"],
            help="type of the support structure (default: none)")
    group_support_structure.add_option("", "--support-profile-height",
            dest="support_profile_height", default=2.0, action="store",
            type="float", help="height of the support profile")
    group_support_structure.add_option("", "--support-profile-thickness",
            dest="support_profile_thickness", default=0.5, action="store",
            type="float", help="width of the support profile")
    group_support_structure.add_option("", "--support-grid-distance-x",
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            dest="support_grid_distance_x", default=10.0, action="store",
            type="float", help="distance along the x-axis between two " \
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            + "adjacent parallel lines of the support structure" \
            + "(only for grid type)")
    group_support_structure.add_option("", "--support-grid-distance-y",
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            dest="support_grid_distance_y", default=10.0, action="store",
            type="float", help="distance along the y-axis between two " \
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            + "adjacent parallel lines of the support structure " \
            + "(only for grid type)")
    group_support_structure.add_option("", "--support-grid-offset-x",
            dest="support_grid_offset_x", default=0.0, action="store",
            type="float", help="shift the support grid along the x axis")
    group_support_structure.add_option("", "--support-grid-offset-y",
            dest="support_grid_offset_y", default=0.0, action="store",
            type="float", help="shift the support grid along the y axis")
    group_support_structure.add_option("", "--support-distributed-distance",
            dest="support_distributed_distance", default=30.0, action="store",
            type="float", help="average distance between two adjacent " \
            + "support bridges")
    group_support_structure.add_option("", "--support-distributed-minimum",
            dest="support_distributed_minimum", default=2, action="store",
            type="int", help="minimum number of support bridges per polygon")
    group_support_structure.add_option("", "--support-distributed-length",
            dest="support_distributed_length", default=5.0, action="store",
            type="float", help="length of each support bridge")
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    # gcode options
    group_gcode.add_option("", "--gcode-no-start-stop-spindle",
            dest="gcode_no_start_stop_spindle", default=True,
            action="store_false", help="do not start the spindle before " \
            + "and stop it after each operation (M3/M5)")
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    group_gcode.add_option("", "--gcode-minimum-step",
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            dest="gcode_minimum_step", default=0.00001,
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            type="float", action="store", help="mimimum axial distance " \
            + "between two machine positions. Any shorter move is not " \
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            + "written to GCode (default: 0.00001).")
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    group_gcode.add_option("", "--gcode-path-mode", dest="gcode_path_mode",
            default="exact_path", action="store", type="choice",
            choices=["exact_path", "exact_stop", "continuous"],
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            help="choose the GCode path mode from 'exact_path', 'exact_stop' " \
            + "and 'continuous'. Use '--gcode-motion-tolerance' and " \
            + "and '--gcode-naive-tolerance' if you want to limit the " \
            + "deviation. See http://linuxcnc.org/docs/html/gcode_main.html " \
            + "(G61) for details.")
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    group_gcode.add_option("", "--gcode-motion-tolerance",
            dest="gcode_motion_tolerance", default=None,
            action="store", help="the optional motion tolerance for " \
            + "'continuous' path mode (G64).")
    group_gcode.add_option("", "--gcode-naive-tolerance",
            dest="gcode_naive_tolerance", default=None,
            action="store", help="the optional naive CAM tolerance for " \
            + "'continuous' path mode (G64).")
    # external program settings
    group_external_programs.add_option("", "--location-inkscape",
            dest="external_program_inkscape", default="", action="store",
            type="string", help="location of the Inkscape executable. " \
            + "This program is required for importing SVG files.")
    group_external_programs.add_option("", "--location-pstoedit",
            dest="external_program_pstoedit", default="", action="store",
            type="string", help="location of the PStoEdit executable. " \
            + "This program is required for importing SVG files.")
    (opts, args) = parser.parse_args()

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    try:
        if opts.profile_destination:
            import cProfile
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            exit_code = cProfile.run('execute(parser, opts, args, pycam)',
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                    opts.profile_destination)
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        else:
            # We need to add the parameter "pycam" to avoid weeeeird namespace
            # issues. Any idea how to fix this?
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            exit_code = execute(parser, opts, args, pycam)
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    except KeyboardInterrupt:
        log.info("Quit requested")
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        exit_code = None
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    pycam.Utils.threading.cleanup()
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    if not exit_code is None:
        sys.exit(exit_code)
    else:
        sys.exit(EXIT_CODES["ok"])
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