bool BaseDemo::onTouchBegan(Touch* touch, Event* event)
{
auto location = touch->getLocation();
auto shapeArr = _world->getShapes(location);
PhysicsBody* body = nullptr;
for(auto& obj : shapeArr)
{
if((obj->getBody()->getTag() & DRAG_BODYS_TAG) != 0)
{
body = obj->getBody();
break;
}
}
if(body != nullptr)
{
Node* mouse = Node::create();
mouse->setPhysicsBody(PhysicsBody::create(PHYSICS_INFINITY, PHYSICS_INFINITY));
mouse->getPhysicsBody()->setDynamic(false);
mouse->setPosition(location);
this->addChild(mouse);
PhysicsJointPin* joint = PhysicsJointPin::construct(mouse->getPhysicsBody(), body, location);
joint->setMaxForce(5000.0f * body->getMass());
_world->addJoint(joint);
_mouses.insert(std::make_pair(touch->getID(), mouse));
return true;
}
return false;
}
bool HelloWorld::onTouchBegan(cocos2d::Touch *touch, cocos2d::Event *event)
{
CCLOG("%s", "touch");
auto location = touch->getLocation();
auto arr = _scene->getPhysicsWorld()->getShapes(location);//从物理世界得到多边形
PhysicsBody *body = nullptr;
for (auto &obj : arr)
{
if ((obj->getBody()->getTag() & DRAG_BODYS_TAG) != 0) //得到刚体
{
body = obj->getBody();
break;
}
}
if (body != nullptr)
{
//创建一个刚体
Node *mouse = Node::create();
mouse->setPhysicsBody(PhysicsBody::create(PHYSICS_INFINITY, PHYSICS_INFINITY));
mouse->getPhysicsBody()->setDynamic(false);
mouse->setPosition(location);
this->addChild(mouse);
body->setLinearDamping(0.0f);
//用图钉关节与点中刚体绑定 赋予力 可以拖动
PhysicsJointPin *joint = PhysicsJointPin::construct(mouse->getPhysicsBody(), body, location);
joint->setMaxForce(5000.0f * body->getMass());
_scene->getPhysicsWorld()->addJoint(joint);
_mouses.insert(std::make_pair(touch->getID(), mouse));
return true;
}
return false;
}
