circle_stack.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 CircleStack : public Test
{
public:
 
        enum
        {
                e_count = 10
        };
 
        CircleStack()
        {
                {
                        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);
                }
 
                {
                        b2CircleShape shape;
                        shape.m_radius = 1.0f;
 
                        for (int32 i = 0; i < e_count; ++i)
                        {
                                b2BodyDef bd;
                                bd.type = b2_dynamicBody;
                                bd.position.Set(0.0, 4.0f + 3.0f * i);
 
                                m_bodies[i] = m_world->CreateBody(&bd);
 
                                m_bodies[i]->CreateFixture(&shape, 1.0f);
 
                                m_bodies[i]->SetLinearVelocity(b2Vec2(0.0f, -50.0f));
                        }
                }
        }
 
        void Step(Settings& settings) override
        {
                Test::Step(settings);
 
                //for (int32 i = 0; i < e_count; ++i)
                //{
                //      printf("%g ", m_bodies[i]->GetWorldCenter().y);
                //}
 
                //for (int32 i = 0; i < e_count; ++i)
                //{
                //      printf("%g ", m_bodies[i]->GetLinearVelocity().y);
                //}
 
                //printf("\n");
        }
 
        static Test* Create()
        {
                return new CircleStack;
        }
 
        b2Body* m_bodies[e_count];
};
 
static int testIndex = RegisterTest("Stacking", "Circles", CircleStack::Create);