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#!/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
#
# 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.
from .framework import (Framework, main)
from Box2D import (b2CircleShape, b2EdgeShape, b2FixtureDef)
class Restitution (Framework):
name = "Restitution example"
description = "Note the difference in bounce height of the circles"
def __init__(self):
super(Restitution, self).__init__()
# The ground
ground = self.world.CreateStaticBody(
shapes=b2EdgeShape(vertices=[(-20, 0), (20, 0)])
)
radius = 1.0
density = 1.0
# The bodies
for i, restitution in enumerate([0.0, 0.1, 0.3, 0.5, 0.75, 0.9, 1.0]):
self.world.CreateDynamicBody(
position=(-10 + 3.0 * i, 20),
fixtures=b2FixtureDef(
shape=b2CircleShape(radius=radius),
density=density, restitution=restitution)
)
if __name__ == "__main__":
main(Restitution)
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