JUCE/examples/Assets/Box2DTests/VaryingRestitution.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 VARYING_RESTITUTION_H
#define VARYING_RESTITUTION_H

// Note: even with a restitution of 1.0, there is some energy change
// due to position correction.
class VaryingRestitution : public Test
{
public:

    VaryingRestitution()
    {
        {
            b2BodyDef bd;
            b2Body* ground = m_world->CreateBody(&bd);

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

        {
            b2CircleShape shape;
            shape.m_radius = 1.0f;

            b2FixtureDef fd;
            fd.shape = &shape;
            fd.density = 1.0f;

            float32 restitution[7] = {0.0f, 0.1f, 0.3f, 0.5f, 0.75f, 0.9f, 1.0f};

            for (int32 i = 0; i < 7; ++i)
            {
                b2BodyDef bd;
                bd.type = b2_dynamicBody;
                bd.position.Set(-10.0f + 3.0f * i, 20.0f);

                b2Body* body = m_world->CreateBody(&bd);

                fd.restitution = restitution[i];
                body->CreateFixture(&fd);
            }
        }
    }

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

#endif