settings.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# C++ version Copyright (c) 2006-2007 Erin Catto http://www.box2d.org
# Python version by Ken Lauer / sirkne at gmail dot com
#
# Implemented using the pybox2d SWIG interface for Box2D (pybox2d.googlecode.com)
#
# This software is provided 'as-is', without any express or implied
# warranty.  In no event will the authors be held liable for any damages
# arising from the use of this software.
# Permission is granted to anyone to use this software for any purpose,
# including commercial applications, and to alter it and redistribute it
# freely, subject to the following restrictions:
# 1. The origin of this software must not be misrepresented; you must not
# claim that you wrote the original software. If you use this software
# in a product, an acknowledgment in the product documentation would be
# appreciated but is not required.
# 2. Altered source versions must be plainly marked as such, and must not be
# misrepresented as being the original software.
# 3. This notice may not be removed or altered from any source distribution.


class fwSettings(object):
    # The default backend to use in (can be: pyglet, pygame, etc.)
    backend = 'pygame'

    # Physics options
    hz = 60.0
    velocityIterations = 8
    positionIterations = 3
    # Makes physics results more accurate (see Box2D wiki)
    enableWarmStarting = True
    enableContinuous = True     # Calculate time of impact
    enableSubStepping = False

    # Drawing
    drawStats = True
    drawShapes = True
    drawJoints = True
    drawCoreShapes = False
    drawAABBs = False
    drawOBBs = False
    drawPairs = False
    drawContactPoints = False
    maxContactPoints = 100
    drawContactNormals = False
    drawFPS = True
    drawMenu = True             # toggle by pressing F1
    drawCOMs = False            # Centers of mass
    pointSize = 2.5             # pixel radius for drawing points

    # Miscellaneous testbed options
    pause = False
    singleStep = False
    # run the test's initialization without graphics, and then quit (for
    # testing)
    onlyInit = False

#             text                  variable
checkboxes = (("Warm Starting", "enableWarmStarting"),
              ("Time of Impact", "enableContinuous"),
              ("Sub-Stepping", "enableSubStepping"),
              ("Draw", None),
              ("Shapes", "drawShapes"),
              ("Joints", "drawJoints"),
              ("AABBs", "drawAABBs"),
              ("Pairs", "drawPairs"),
              ("Contact Points", "drawContactPoints"),
              ("Contact Normals", "drawContactNormals"),
              ("Center of Masses", "drawCOMs"),
              ("Statistics", "drawStats"),
              ("FPS", "drawFPS"),
              ("Control", None),
              ("Pause", "pause"),
              ("Single Step", "singleStep"))

sliders = [
    {'name': 'hz', 'text': 'Hertz', 'min': 5, 'max': 200},
    {'name': 'positionIterations', 'text': 'Pos Iters', 'min': 0, 'max': 100},
    {'name': 'velocityIterations', 'text': 'Vel Iters', 'min': 1, 'max': 500},
]

from optparse import OptionParser

parser = OptionParser()
list_options = [i for i in dir(fwSettings)
                if not i.startswith('_')]

for opt_name in list_options:
    value = getattr(fwSettings, opt_name)
    if isinstance(value, bool):
        if value:
            parser.add_option('', '--no-' + opt_name, dest=opt_name,
                              default=value, action='store_' + str(not value).lower(),
                              help="don't " + opt_name)
        else:
            parser.add_option('', '--' + opt_name, dest=opt_name, default=value,
                              action='store_' + str(not value).lower(),
                              help=opt_name)

    else:
        if isinstance(value, int):
            opttype = 'int'
        elif isinstance(value, float):
            opttype = 'float'
        else:
            opttype = 'string'
        parser.add_option('', '--' + opt_name, dest=opt_name, default=value,
                          type=opttype,
                          help='sets the %s option' % (opt_name,))


fwSettings, args = parser.parse_args()