tumbler.cpp

Go to the documentation of this file.

// 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 Tumbler : public Test
{
public:

        enum
        {
                e_count = 800
        };

        Tumbler()
        {
                b2Body* ground = NULL;
                {
                        b2BodyDef bd;
                        ground = m_world->CreateBody(&bd);
                }

                {
                        b2BodyDef bd;
                        bd.type = b2_dynamicBody;
                        bd.allowSleep = false;
                        bd.position.Set(0.0f, 10.0f);
                        b2Body* body = m_world->CreateBody(&bd);

                        b2PolygonShape shape;
                        shape.SetAsBox(0.5f, 10.0f, b2Vec2( 10.0f, 0.0f), 0.0);
                        body->CreateFixture(&shape, 5.0f);
                        shape.SetAsBox(0.5f, 10.0f, b2Vec2(-10.0f, 0.0f), 0.0);
                        body->CreateFixture(&shape, 5.0f);
                        shape.SetAsBox(10.0f, 0.5f, b2Vec2(0.0f, 10.0f), 0.0);
                        body->CreateFixture(&shape, 5.0f);
                        shape.SetAsBox(10.0f, 0.5f, b2Vec2(0.0f, -10.0f), 0.0);
                        body->CreateFixture(&shape, 5.0f);

                        b2RevoluteJointDef jd;
                        jd.bodyA = ground;
                        jd.bodyB = body;
                        jd.localAnchorA.Set(0.0f, 10.0f);
                        jd.localAnchorB.Set(0.0f, 0.0f);
                        jd.referenceAngle = 0.0f;
                        jd.motorSpeed = 0.05f * b2_pi;
                        jd.maxMotorTorque = 1e8f;
                        jd.enableMotor = true;
                        m_joint = (b2RevoluteJoint*)m_world->CreateJoint(&jd);
                }

                m_count = 0;
        }

        void Step(Settings& settings) override
        {
                Test::Step(settings);

                if (m_count < e_count)
                {
                        b2BodyDef bd;
                        bd.type = b2_dynamicBody;
                        bd.position.Set(0.0f, 10.0f);
                        b2Body* body = m_world->CreateBody(&bd);

                        b2PolygonShape shape;
                        shape.SetAsBox(0.125f, 0.125f);
                        body->CreateFixture(&shape, 1.0f);

                        ++m_count;
                }
        }

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

        b2RevoluteJoint* m_joint;
        int32 m_count;
};

static int testIndex = RegisterTest("Benchmark", "Tumbler", Tumbler::Create);