实现物体的方向跟着拖拽的方向

来源：互联网发布：中国联通4g网络设置编辑：程序博客网时间：2024/06/06 15:45
实现物体的方向跟着拖拽的方向
bool Hero::touchBegin(Touch* touch,Event* event){auto target = static_cast<Sprite*>(event->getCurrentTarget());//得到对象if (target->getBoundingBox().containsPoint(touch->getLocation())){target->setOpacity(200);return true;}return false;}void Hero::touchMoved(Touch* touch,Event* event){auto target = static_cast<Sprite*>(event->getCurrentTarget());static Point oldPosition = Point(-1,-1);static Point newPosition = Point(-1,-1);if (oldPosition.x ==-1){oldPosition = target->getPosition();}else{oldPosition = newPosition;newPosition = target->getPosition();float width = newPosition.x - oldPosition.x;float height = newPosition.y - oldPosition.y;if (isActionDone){float  radian;float angle;if (height>0&&width<0){radian=atan(width/ height);//h弧度angle = (radian*360)/(2*3.141592);//化成角度了}if (height>0&&width==0){angle = 0;}if (height>0&& width>0){radian=atan(width/ height);//h弧度angle = (radian*360)/(2*3.141592);//化成角度了}if (height==0&&width >0){angle = 90;}if (height<0&&width>0){radian=atan( height/width);//h弧度angle = (radian*360)/(2*3.141592);//化成角度了angle =90- angle;}if (height<0&&width==0){angle = 180;}if (height<0&&width<0){radian=atan(width/ height);//h弧度angle = (radian*360)/(2*3.141592);//化成角度了angle+=180;}if (height==0&&width<0){angle = 270;}CallFunc * funcall= CallFunc::create(this, callfunc_selector(Hero::actionDone));FiniteTimeAction* actionRotateBy= RotateTo::create(0.1,angle);FiniteTimeAction* task = Sequence::create(actionRotateBy,funcall, NULL);runAction(task);isActionDone = false;}}target->setPosition(target->getPosition() + touch->getDelta());//防出界if (target->getPositionX()<0){target->setPositionX(0);}if (target->getPositionX()>Director::getInstance()->getWinSize().width){target->setPositionX(Director::getInstance()->getWinSize().width);}if (target->getPositionY()<0){target->setPositionY(0);}if (target->getPositionY()>Director::getInstance()->getWinSize().height){target->setPositionY(Director::getInstance()->getWinSize().height);}}void Hero::touchEnded(Touch* touch,Event* event){auto target = static_cast<Sprite*>(event->getCurrentTarget());target->setOpacity(255);}
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