实现超级玛丽上下左右运动

概述用Cocos2dx实现超级玛丽，首先用帧循环定时器判断方向，再在类中实现运行以及判断是否能运动。 方向控制 void LayerGame::moveMario(float dt){#ifdef WIN32 short key; key = GetKeyState('F'); if (key < 0) _marioDir = Common::RIGHT; ke 用Cocos2dx实现超级玛丽，首先用帧循环定时器判断方向，再在类中实现运行以及判断是否能运动。 方向控制

voID LayerGame::moveMario(float dt){#ifdef WIN32    short key;    key = GetKeyState('F');    if (key < 0) _marioDir = Common::RIGHT;    key = GetKeyState('D');    if (key < 0) _marioDir = Common::left;    key = GetKeyState('J');    if (key < 0)_mario->jump();#endif    if (_marioDir==Common::left)    {        //cclog("left\n");        _marioDir=Common::NONE;        _mario->moveleft(dt);    }else if(_marioDir==Common::RIGHT)    {        //cclog("right\n");        _marioDir=Common::NONE;        _mario->moveRight(dt);    }else    {        //cclog("stop\n");        _menuShow->setTexture(_textureDirNone);        _mario->stop();    }    _mario->moveUp(dt);    _mario->moveDown(dt);}

判断是否能向上，向左，向右，向下运动，利用碰撞检测

bool Mario::canMoveleft(float dt){    //judge if mario is out of the map    CCRect rcMario=this->boundingBox();    CCPoint ptMario=ccp(rcMario.getMinX(),rcMario.getMinY());    CCTMXTiledMap *map=getMap();    CCPoint ptMarioInWorld=map->convertToWorldspace(ptMario);    if (ptMarioInWorld.x-dt*_speed<0)       {        return false;    }    //judge if partition by a wall    CCPoint pt[3];    pt[0] = ccp(rcMario.getMinX() - dt*_speed,rcMario.getMIDY());    pt[1] = ccp(rcMario.getMinX() - dt*_speed,rcMario.getMinY());    pt[2] = ccp(rcMario.getMinX() - dt*_speed,rcMario.getMaxY());    //transform position,change pt into tile and get gID to decIDe whether be stoped by wall    for(int i=0;i<3;i++)    {        if (pt[i].y >= map->getContentSize().height)            continue;        CCPoint ptTile=Common::Point2Tile(map,pt[i]);        //wall water pipe and floor        static const char* layername[3] = { "block","pipe","land" };        for(int j=0;j<3;j++)        {            CCTMXLayer *layer=map->layernamed(layername[j]);            int gID=layer->tileGIDAt(ptTile);            if (gID!=0)            {                return false;            }        }    }    return true;}bool Mario::canMoveRight(float dt){    CCRect rcMario = boundingBox();    CCTMXTiledMaP* map = getMap();    CCPoint pt[3];    pt[0] = ccp(rcMario.getMaxX() + dt*_speed,rcMario.getMIDY());    pt[1] = ccp(rcMario.getMaxX() + dt*_speed,rcMario.getMinY());    pt[2] = ccp(rcMario.getMaxX() + dt*_speed,rcMario.getMaxY());    // 坐标转换，将pt转化成地图格子坐标,然后获取gID，判断gID是不是被阻挡    for (int i = 0; i < 3; ++i)    {        if (pt[i].y >= map->getContentSize().height)            continue;        CCPoint ptTile = Common::Point2Tile(map,pt[i]);        // 水管、砖头，地板        static const char* layername[3] = { "block","land" };        for (int j = 0; j < 3; ++j)        {            CCTMXLayer* layer = map->layernamed(layername[j]);            int gID = layer->tileGIDAt(ptTile);            if (gID != 0)            {                return false;            }        }    }    return true;}bool Mario::canMoveDown(float dt){    CCRect rcMario = boundingBox();    CCTMXTiledMaP* map = getMap();    CCPoint pt[3];    //dt*_speedDown    pt[0] = ccp(rcMario.getMIDX(),rcMario.getMinY() - dt*_speedDown);    pt[1] = ccp(rcMario.getMinX(),rcMario.getMinY() - dt*_speedDown);    pt[2] = ccp(rcMario.getMaxX(),rcMario.getMinY() - dt*_speedDown);    if (pt[0].y >= map->getContentSize().height)        return true;    // 坐标转换，将pt转化成地图格子坐标,然后获取gID，判断gID是不是被阻挡    for (int i = 0; i < 3; ++i)    {        CCPoint ptTile = Common::Point2Tile(map,"land" };        for (int j = 0; j < 3; ++j)        {            CCTMXLayer* layer = map->layernamed(layername[j]);            int gID = layer->tileGIDAt(ptTile);            if (gID != 0)            {                // 微调                CCPoint ptLB = Common::Tile2PointLB(map,ptTile+ccp(0,-1));                this->setpositionY(ptLB.y);                return false;            }        }    }    return true;}bool Mario::canMoveUp(float dt){    CCRect rcMario = boundingBox();    CCTMXTiledMaP* map = getMap();    CCPoint pt[3];    pt[0] = ccp(rcMario.getMIDX(),rcMario.getMaxY() + dt*_speedUp);    pt[1] = ccp(rcMario.getMinX(),rcMario.getMaxY() + dt*_speedUp);    pt[2] = ccp(rcMario.getMaxX(),rcMario.getMaxY() + dt*_speedUp);    if (pt[0].y >= map->getContentSize().height)        return true;    // 坐标转换，将pt转化成地图格子坐标,ptTile);                this->setpositionY(ptLB.y);                return false;            }        }    }    return true;}

运行实现

voID Mario::moveleft(float dt){    if (_dirRun!=Common::left)    {        _dirRun=Common::left;        _dirFace=Common::left;        updateStatus();    }    if (!canMoveleft(dt))        return;    Common::moveNode(this,ccp(-dt*_speed,0));    //scroll map    CCNode *map=this->getParent();    CCPoint ptWorld=map->convertToWorldspace(this->getposition());    if (ptWorld.x<winSize.wIDth/2&&map->getpositionX()<0)    {        Common::moveNode(map,ccp(dt*_speed,0));    }}voID Mario::moveRight(float dt){    if (_dirRun!=Common::RIGHT)    {        _dirRun=Common::RIGHT;        _dirFace=Common::RIGHT;        updateStatus();    }    if (!canMoveRight(dt))        return;    Common::moveNode(this,0));    //scroll map    CCNode *map=this->getParent();    CCPoint ptWorld=map->convertToWorldspace(this->getposition());    if (ptWorld.x>winSize.wIDth/2)    {        Common::moveNode(map,0));    }}voID Mario::moveUp(float dt){    if (_speedUp<=0)    {        return;    }    if (!canMoveUp(dt))    {        // 反d效果        _speedDown = _speedUp;        _speedUp = 0; // 不继续上升了        return;    }    Common::moveNode(this,ccp(0,dt*_speedUp));    _speedUp-=_speedAcc;    //_speedDown=_speedUp;}voID Mario::moveDown(float dt){    if(_speedUp<=0)    {    if (canMoveDown(dt))    {        if (_bFly==false)        {            _bFly=true;            updateStatus();        }        Common::moveNode(this,-dt*_speedDown));        _speedDown+=_speedAcc;    }    else    {        if (_bFly)        {            _bFly = false;            _speedDown = _speedAcc;            updateStatus();        }    }    }}voID Mario::stop(){    if (_dirRun!=Common::NONE)    {        _dirRun=Common::NONE;        updateStatus();    }}voID Mario::jump(){    static int i=0;    cclog("speed%d=%d",++i,_speedUp);    if (_bFly)        return;    _speedUp=300;    _bFly=true;    updateStatus();}

运行状态机，控制运行时的动画

voID Mario::updateStatus(){    stopAllActions();    if (_bFly)    {        if (_dirFace==Common::left)        {            setdisplayFrame(CCSpriteFrameCache::sharedSpriteFrameCache()->spriteFrameByname("SmallJumpleft")); }else if(_dirFace==Common::RIGHT) { setdisplayFrame(CCSpriteFrameCache::sharedSpriteFrameCache()->spriteFrameByname("SmallJumpRight")); } return; } if (_dirRun==Common::left) { this->runAction(CCRepeatForever::create(CCAnimate::create(CCAnimationCache::sharedAnimationCache()->animationByname("SmallWalkleft")))); }else if (_dirRun==Common::RIGHT) { this->runAction(CCRepeatForever::create(CCAnimate::create(CCAnimationCache::sharedAnimationCache()->animationByname("SmallWalkRight")))); }else { if (_dirFace==Common::left) { this->setdisplayFrameWithAnimationname("SmallWalkleft",0);        }else if(_dirFace==Common::RIGHT)        {            this->setdisplayFrameWithAnimationname("SmallWalkRight",0);        }    }}

注：在实现这个功能的时候，由于把等于写成赋值，发生了许多灵异的错误，要小心啊，等于与赋值。

运行结果 总结

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