JUCE/examples/Assets/Box2DTests/Chain.h

/*
* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
*
* 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.
*/

#ifndef CHAIN_H
#define CHAIN_H

class Chain : public Test
{
public:
    Chain()
    {
        b2Body* ground = {};
        {
            b2BodyDef bd;
            ground = m_world->CreateBody(&bd);

            b2EdgeShape shape;
            shape.Set(b2Vec2(-40.0f, 0.0f), b2Vec2(40.0f, 0.0f));
            ground->CreateFixture(&shape, 0.0f);
        }

        {
            b2PolygonShape shape;
            shape.SetAsBox(0.6f, 0.125f);

            b2FixtureDef fd;
            fd.shape = &shape;
            fd.density = 20.0f;
            fd.friction = 0.2f;

            b2RevoluteJointDef jd;
            jd.collideConnected = false;

            const float32 y = 25.0f;
            b2Body* prevBody = ground;
            for (int i = 0; i < 30; ++i)
            {
                b2BodyDef bd;
                bd.type = b2_dynamicBody;
                bd.position.Set(0.5f + i, y);
                b2Body* body = m_world->CreateBody(&bd);
                body->CreateFixture(&fd);

                b2Vec2 anchor(float32(i), y);
                jd.Initialize(prevBody, body, anchor);
                m_world->CreateJoint(&jd);

                prevBody = body;
            }
        }
    }

    static Test* Create()
    {
        return new Chain;
    }
};

#endif