#!/usr/bin/python
#
# C++ version Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com
# Python version Copyright (c) 2008 kne / 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.

from test_main import *

class Chain (Framework):
    name="Chain"
    def __init__(self):
        super(Chain, self).__init__()
        bd=box2d.b2BodyDef() 
        bd.position = (0.0, -10.0)
        ground = self.world.CreateBody(bd)

        sd=box2d.b2PolygonDef() 
        sd.SetAsBox(50.0, 10.0)
        ground.CreateShape(sd)

        sd=box2d.b2PolygonDef() 
        sd.SetAsBox(0.6, 0.125)
        sd.density = 20.0
        sd.friction = 0.2

        jd=box2d.b2RevoluteJointDef() 
        jd.collideConnected = False

        y = 25.0
        prevBody=ground
        for i in range(30):
            bd=box2d.b2BodyDef() 
            bd.position = (0.5 + i, y)
            body = self.world.CreateBody(bd) 
            body.CreateShape(sd)
            body.SetMassFromShapes()
            
            anchor=(i, y)
            jd.Initialize(prevBody, body, anchor)
            self.world.CreateJoint(jd).getAsType()
            
            prevBody = body
     
if __name__=="__main__":
     main(Chain)