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Viewing changes to tests/box2d/Testbed/Tests/Pulleys.h

  • Committer: Package Import Robot
  • Author(s): Sylvestre Ledru
  • Date: 2013-05-02 13:11:51 UTC
  • Revision ID: package-import@ubuntu.com-20130502131151-q8dvteqr1ef2x7xz
Tags: upstream-1.4.1~20130504~adb56cb
Import upstream version 1.4.1~20130504~adb56cb

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tests/box2d/Testbed/Tests/Pulleys.h
 
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/*
 
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* Copyright (c) 2007-2009 Erin Catto http://www.box2d.org
 
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*
 
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* This software is provided 'as-is', without any express or implied
 
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* warranty.  In no event will the authors be held liable for any damages
 
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* arising from the use of this software.
 
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* Permission is granted to anyone to use this software for any purpose,
 
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* including commercial applications, and to alter it and redistribute it
 
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* freely, subject to the following restrictions:
 
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* 1. The origin of this software must not be misrepresented; you must not
 
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* claim that you wrote the original software. If you use this software
 
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* in a product, an acknowledgment in the product documentation would be
 
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* appreciated but is not required.
 
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* 2. Altered source versions must be plainly marked as such, and must not be
 
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* misrepresented as being the original software.
 
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* 3. This notice may not be removed or altered from any source distribution.
 
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*/
 
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#ifndef PULLEYS_H
 
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#define PULLEYS_H
 
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class Pulleys : public Test
 
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{
 
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public:
 
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        Pulleys()
 
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        {
 
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                float32 y = 16.0f;
 
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                float32 L = 12.0f;
 
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                float32 a = 1.0f;
 
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                float32 b = 2.0f;
 
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                b2Body* ground = NULL;
 
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                {
 
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                        b2BodyDef bd;
 
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                        ground = m_world->CreateBody(&bd);
 
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                        b2EdgeShape edge;
 
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                        edge.Set(b2Vec2(-40.0f, 0.0f), b2Vec2(40.0f, 0.0f));
 
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                        //ground->CreateFixture(&shape, 0.0f);
 
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                        b2CircleShape circle;
 
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                        circle.m_radius = 2.0f;
 
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                        circle.m_p.Set(-10.0f, y + b + L);
 
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                        ground->CreateFixture(&circle, 0.0f);
 
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                        circle.m_p.Set(10.0f, y + b + L);
 
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                        ground->CreateFixture(&circle, 0.0f);
 
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                }
 
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                {
 
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                        b2PolygonShape shape;
 
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                        shape.SetAsBox(a, b);
 
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                        b2BodyDef bd;
 
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                        bd.type = b2_dynamicBody;
 
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                        //bd.fixedRotation = true;
 
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                        bd.position.Set(-10.0f, y);
 
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                        b2Body* body1 = m_world->CreateBody(&bd);
 
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                        body1->CreateFixture(&shape, 5.0f);
 
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                        bd.position.Set(10.0f, y);
 
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                        b2Body* body2 = m_world->CreateBody(&bd);
 
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                        body2->CreateFixture(&shape, 5.0f);
 
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                        b2PulleyJointDef pulleyDef;
 
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                        b2Vec2 anchor1(-10.0f, y + b);
 
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                        b2Vec2 anchor2(10.0f, y + b);
 
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                        b2Vec2 groundAnchor1(-10.0f, y + b + L);
 
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                        b2Vec2 groundAnchor2(10.0f, y + b + L);
 
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                        pulleyDef.Initialize(body1, body2, groundAnchor1, groundAnchor2, anchor1, anchor2, 1.5f);
 
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                        m_joint1 = (b2PulleyJoint*)m_world->CreateJoint(&pulleyDef);
 
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                }
 
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        }
 
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        void Keyboard(unsigned char key)
 
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        {
 
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                switch (key)
 
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                {
 
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                case 0:
 
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                        break;
 
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                }
 
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        }
 
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        void Step(Settings* settings)
 
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        {
 
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                Test::Step(settings);
 
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                float32 ratio = m_joint1->GetRatio();
 
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                float32 L = m_joint1->GetLengthA() + ratio * m_joint1->GetLengthB();
 
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                m_debugDraw.DrawString(5, m_textLine, "L1 + %4.2f * L2 = %4.2f", (float) ratio, (float) L);
 
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                m_textLine += 15;
 
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        }
 
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        static Test* Create()
 
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        {
 
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                return new Pulleys;
 
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        }
 
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        b2PulleyJoint* m_joint1;
 
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};
 
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#endif