PhysicsJoint

1
PhysicsJoint的使用

T09Join.h

#ifndef__T09Joint_H__ #define__T09Joint_H__ #include"T32.h" classT09Joint: publicLayer { public: CREATE_FUNC(T09Joint); voidonEnter(); PhysicsWorld*getPhysicsWorld() { return((Scene*)getParent())->getPhysicsWorld(); } Sprite*_A; Sprite*_B; Sprite*_C; }; #endif

T09Join.cpp

#include"T09Join.h" voidT09Joint::onEnter() { Layer::onEnter(); PhysicsBody*bodyA; PhysicsBody*bodyB; { PhysicsBody*body= PhysicsBody::createCircle(20); bodyA= body; Sprite*sprite= Sprite::create(); _A= sprite; sprite->setContentSize(Size(40,40)); sprite->setPhysicsBody(body); sprite->setPosition(winSize.width/ 2 - 50, winSize.height/ 2 + 100); addChild(sprite); } { //PhysicsBody*body = PhysicsBody::createEdgeBox(Size(40, 40)); PhysicsBody*body= PhysicsBody::createBox(Size(40,40)); bodyB= body; Sprite*sprite= Sprite::create(); sprite->setContentSize(Size(40,40)); _B= sprite; sprite->setPhysicsBody(body); sprite->setPosition(winSize.width/ 2 + 50, winSize.height/ 2 + 100); addChild(sprite); } { PhysicsBody*body= PhysicsBody::createEdgeBox(winSize,PhysicsMaterial(1.0f,1.0f, 0.0f)); Sprite*sprite= Sprite::create(); addChild(sprite); sprite->setPhysicsBody(body); sprite->setPosition(winSize.width/ 2, winSize.height/ 2); } // PhysicsJoint*joint = PhysicsJointDistance::construct(bodyA, bodyB, Vec2(0, 0),Vec2(0, 0)); // PhysicsJoint*joint = PhysicsJointSpring::construct(bodyA, bodyB, Vec2(0, 0),Vec2(0, 0), 500.0f, 500.0f); // PhysicsJoint*joint = PhysicsJointPin::construct(bodyA, bodyB,Vec2(winSize.width / 2, winSize.height / 2)); PhysicsJoint*joint= PhysicsJointMotor::construct(bodyA,bodyB,1.0); { autoev= EventListenerTouchOneByOne::create(); ev->onTouchBegan= [&](Touch*touch,Event*){ Pointpt= touch->getLocation(); if(_A->getBoundingBox().containsPoint(pt)); { _C= _A; returntrue; } if(_B->getBoundingBox().containsPoint(pt)) { _C= _B; returntrue; } returnfalse; }; ev->onTouchEnded= [&](Touch*pTouch,Event*){ Vec2pt= pTouch->getLocation()- pTouch->getStartLocation(); _C->getPhysicsBody()->setVelocity(Vec2(pt)); }; } }