Cocos2d-x3.x塔防游戏保卫萝卜从零开始(一)

bool MainScene::init()
{
    if ( !Layer::init() )
    {
        return false;
    }
    Size visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();
    //载入地图背景
    auto sprite = Sprite::create("level_bg_1.png");
    sprite->setPosition(Vec2(visibleSize.width/2 + origin.x,visibleSize.height/2 + origin.y));
    this->addChild(sprite,0);
    true;
}

载入地图背景 …… auto sprite = Sprite::create(0); 在地图起点处放置一个色狼 auto dssprite = Sprite::create(dashu.png"); dssprite->setPosition(Vec2(40,128); line-height:1.5!important">390)); this->addChild(dssprite,0); line-height:1.5!important">在地图终点处放置一个女主角 auto nhSprite = Sprite::create(girl.png"); nhSprite->setPosition(Vec2(920,128); line-height:1.5!important">480)); this->addChild(nhSprite,128); line-height:1.5!important">0); …...

class Waypoint: public cocos2d::CCNode { public: Waypoint(void); ~Waypoint(void); 初始化方法 static Waypoint* nodeWithTheLocation(cocos2d::Point location); bool initWithTheLocation(cocos2d::Point location); 设置当前点的下一个路径点 void setNextWaypoint(Waypoint* waypoint); 获取当前点的下一个路径点 Waypoint* getNextWaypoint(); 当前路径点位置 CC_SYNTHESIZE(cocos2d::Point,_myPosition,MyPosition); private: 下一个路径点 Waypoint* _nextWaypoint; }; Waypoint.cpp： Waypoint::Waypoint(void) { _nextWaypoint=NULL; } Waypoint::~Waypoint(void) { } Waypoint* Waypoint::nodeWithTheLocation(cocos2d::Point location) { Waypoint* pRet=new Waypoint(); if (pRet && pRet->initWithTheLocation(location)) { pRet->autorelease(); return pRet; } else { delete pRet; pRet=NULL; return NULL; } } bool Waypoint::initWithTheLocation(cocos2d::Point location) { bool bRet=false; do { _myPosition=location; this->setPosition(Point::ZERO); bRet=true; } while (return bRet; } void Waypoint::setNextWaypoint(Waypoint* waypoint) { _nextWaypoint=waypoint; } Waypoint* Waypoint::getNextWaypoint() { return _nextWaypoint; }

public: …… 重写Layer的update方法 我们主要在这个方法里实现色狼移动 virtual void update(float delta); CREATE_FUNC(MainScene); 路径开始点 Waypoint *beginningWaypoint; 路径目标点 Waypoint *destinationWaypoint; 色狼的移动速度 float walkingSpeed; 色狼当前位置 cocos2d::Vec2 myPosition; 色狼大叔 cocos2d::Sprite* dssprite; 路径点集合 cocos2d::Vector<Waypoint*> wayPositions; 判断2个点是否靠近 bool collisionWithCircle(cocos2d::Vec2 circlePoint,float radius,cocos2d::Vec2 circlePointTwo,255); line-height:1.5!important">float radiusTwo);

……

//获得色狼大叔的高
float dsh=dssprite->getTextureRect().size.height;

初始化地图路径点集合
    this->wayPositions = Vector<Waypoint*>();

    添加地图1号路径点到集合中
    Waypoint *waypoint1=Waypoint::nodeWithTheLocation(Point(435+dsh/2.0f));
    if(this->wayPositions.size()>0)
    {
        设置下一个节点
        waypoint1->setNextWaypoint(this->wayPositions.back());
    }
    this->wayPositions.pushBack(waypoint1);
    添加地图2号路径点到集合中
    Waypoint *waypoint2=Waypoint::nodeWithTheLocation(Point(762,128); line-height:1.5!important">0)
    {
        waypoint2->setNextWaypoint(this->wayPositions.pushBack(waypoint2);
    添加地图3号路径点到集合中
    Waypoint *waypoint3=Waypoint::nodeWithTheLocation(Point(360+dsh/0)
    {
        waypoint3->setNextWaypoint(this->wayPositions.pushBack(waypoint3);
    添加地图4号路径点到集合中
    Waypoint *waypoint4=Waypoint::nodeWithTheLocation(Point(685,128); line-height:1.5!important">0)
    {
        waypoint4->setNextWaypoint(this->wayPositions.pushBack(waypoint4);
    添加地图5号路径点到集合中
    Waypoint *waypoint5=Waypoint::nodeWithTheLocation(Point(116+dsh/0)
    {
        waypoint5->setNextWaypoint(this->wayPositions.pushBack(waypoint5);
    添加地图6号路径点到集合中
    Waypoint *waypoint6=Waypoint::nodeWithTheLocation(Point(520,128); line-height:1.5!important">0)
    {
        waypoint6->setNextWaypoint(this->wayPositions.pushBack(waypoint6);
    添加地图7号路径点到集合中
    Waypoint *waypoint7=Waypoint::nodeWithTheLocation(Point(180+dsh/0)
    {
        waypoint7->setNextWaypoint(this->wayPositions.pushBack(waypoint7);
    添加地图8号路径点到集合中
    Waypoint *waypoint8=Waypoint::nodeWithTheLocation(Point(285,128); line-height:1.5!important">0)
    {
        waypoint8->setNextWaypoint(this->wayPositions.pushBack(waypoint8);
    添加地图9号路径点到集合中
    Waypoint *waypoint9=Waypoint::nodeWithTheLocation(Point(268+dsh/0)
    {
        waypoint9->setNextWaypoint(this->wayPositions.pushBack(waypoint9);
    添加地图10号路径点到集合中
    Waypoint *waypoint10=Waypoint::nodeWithTheLocation(Point(204,128); line-height:1.5!important">0)
    {
        waypoint10->setNextWaypoint(this->wayPositions.pushBack(waypoint10);
    添加地图11号路径点到集合中
    Waypoint *waypoint11=Waypoint::nodeWithTheLocation(Point(350+dsh/0)
    {
        waypoint11->setNextWaypoint(this->wayPositions.pushBack(waypoint11);
    添加地图12号路径点到集合中
    Waypoint *waypoint12=Waypoint::nodeWithTheLocation(Point(50,128); line-height:1.5!important">0)
    {
        waypoint12->setNextWaypoint(this->wayPositions.pushBack(waypoint12);
……

 ……
   获取集合中的最后一个点，12号点
    Waypoint *waypoint0=wayPositions.back();
    设置运动的开始点
    beginningWaypoint=waypoint0;
    设置运动的目标点为12号点的下一个点，11号点
    destinationWaypoint=waypoint0->getNextWaypoint();
    设置色狼当前位置值
    myPosition=waypoint0->getMyPosition();
    设置色狼在地图的初始位置
    dssprite->setPosition(myPosition);
    设置女主角在地图的初始位置，为集合中的1号点
    nhSprite->setPosition(wayPositions.front()->getMyPosition());
设置移动速度
    this->walkingSpeed=0.2f;
    定时器
    this->scheduleUpdate();
……

判断2个圆点是否靠近 circlePoint:第一个圆点坐标 radius:第一个圆半径 circlePointTwo:第二个圆点坐标 radiusTwo:第二个圆半径 bool MainScene::collisionWithCircle(cocos2d::Vec2 circlePoint,255); line-height:1.5!important">float radiusTwo) { 2点间距离公式计算 float xdif = circlePoint.x - circlePointTwo.x; float ydif = circlePoint.y - circlePointTwo.y; float distance = sqrt(xdif * xdif + ydif * ydif); if(distance <= radius + radiusTwo) { true; } false; }

判断色狼大叔是否和目标点碰到 if (this->collisionWithCircle(myPosition,128); line-height:1.5!important">1,destinationWaypoint->getMyPosition(),128); line-height:1.5!important">1) ) { 是否还有下一个目标点 if (destinationWaypoint->getNextWaypoint()) { 重新设定开始点和目标点 beginningWaypoint=destinationWaypoint; destinationWaypoint=destinationWaypoint->getNextWaypoint(); } } 获取目标点的坐标 Point targetPoint=destinationWaypoint->getMyPosition(); 计算目标点的向量 Point normalized=Point(targetPoint.x-myPosition.x,targetPoint.y-myPosition.y).getnormalized(); 根据速度和向量分别计算x,y方式上的偏移值 float ox=normalized.x * walkingSpeed; float oy=normalized.y *walkingSpeed; myPosition = Point(myPosition.x + ox,myPosition.y +oy); 重新设定色狼的位置实现移动 dssprite->setPosition(myPosition);