axmol/samples/Cpp/TestCpp/Classes/Box2DTestBed/Tests/Pyramid.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 PYRAMID_H
#define PYRAMID_H

class Pyramid : public Test
{
public:
    enum
    {
        e_count = 20
    };

    Pyramid()
    {
        {
            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);
        }

        {
            float32 a = 0.5f;
            b2PolygonShape shape;
            shape.SetAsBox(a, a);

            b2Vec2 x(-7.0f, 0.75f);
            b2Vec2 y;
            b2Vec2 deltaX(0.5625f, 1.25f);
            b2Vec2 deltaY(1.125f, 0.0f);

            for (int32 i = 0; i < e_count; ++i)
            {
                y = x;

                for (int32 j = i; j < e_count; ++j)
                {
                    b2BodyDef bd;
                    bd.type = b2_dynamicBody;
                    bd.position = y;
                    b2Body* body = m_world->CreateBody(&bd);
                    body->CreateFixture(&shape, 5.0f);

                    y += deltaY;
                }

                x += deltaX;
            }
        }
    }

    void Step(Settings* settings)
    {
        Test::Step(settings);

        //b2DynamicTree* tree = &m_world->m_contactManager.m_broadPhase.m_tree;

        //if (m_stepCount == 400)
        //{
        //    tree->RebuildBottomUp();
        //}
    }

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

#endif