LineJoint.h
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上传日期:2022-01-07
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- /*
- * Copyright (c) 2006-2009 Erin Catto http://www.gphysics.com
- *
- * 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 LINE_JOINT_H
- #define LINE_JOINT_H
- // A line joint with a limit and friction.
- class LineJoint : public Test
- {
- public:
- LineJoint()
- {
- b2Body* ground = NULL;
- {
- b2PolygonShape shape;
- shape.SetAsEdge(b2Vec2(-40.0f, 0.0f), b2Vec2(40.0f, 0.0f));
- b2BodyDef bd;
- ground = m_world->CreateBody(&bd);
- ground->CreateFixture(&shape, 0.0f);
- }
- {
- b2PolygonShape shape;
- shape.SetAsBox(0.5f, 2.0f);
- b2BodyDef bd;
- bd.type = b2_dynamicBody;
- bd.position.Set(0.0f, 7.0f);
- b2Body* body = m_world->CreateBody(&bd);
- body->CreateFixture(&shape, 1.0f);
- b2LineJointDef jd;
- b2Vec2 axis(2.0f, 1.0f);
- axis.Normalize();
- jd.Initialize(ground, body, b2Vec2(0.0f, 8.5f), axis);
- jd.motorSpeed = 0.0f;
- jd.maxMotorForce = 100.0f;
- jd.enableMotor = true;
- jd.lowerTranslation = -4.0f;
- jd.upperTranslation = 4.0f;
- jd.enableLimit = true;
- m_world->CreateJoint(&jd);
- }
- }
- static Test* Create()
- {
- return new LineJoint;
- }
- };
- #endif