pyramid.cpp

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// MIT License
 
// Copyright (c) 2019 Erin Catto
 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
 
#include "test.h"
 
class Pyramid : public Test
{
public:
        enum
        {
                e_count = 20
        };
 
        Pyramid()
        {
                {
                        b2BodyDef bd;
                        b2Body* ground = m_world->CreateBody(&bd);
 
                        b2EdgeShape shape;
                        shape.SetTwoSided(b2Vec2(-40.0f, 0.0f), b2Vec2(40.0f, 0.0f));
                        ground->CreateFixture(&shape, 0.0f);
                }
 
                {
                        float 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) override
        {
                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;
        }
};
 
static int testIndex = RegisterTest("Stacking", "Pyramid", Pyramid::Create);