华容道06--屏幕点击事件和角色间的碰撞

关卡数据已经能显示出来了，现在需要添加角色精灵的移动。这就需要添加触屏点击事件。在点击事件中对触屏的进行手势识别，手势识别非常简单，就是判断玩家是想让角色向上移动和是向哪移动。

思路：

两个Vec2类型的变量，记录点击开始的点和移动过程中的点。

一个RoleSprite类型的变量，记录当前选中的精灵。

Float类型的变量，指定最小的判断距离，也就是说，如果，移动距离比较小是不会有反应的。

用一个二维数组来记录当前每个格子的状态，移动RoleSprite的时候判断是否可以移动。

代码：

GameLayer.h

#ifndef _GAME_LAYER_H_#define _GAME_LAYER_H_#include "cocos2d.h"class Level ;class RoleSprite ;class GameLayer : public cocos2d::Layer{public: static cocos2d::Scene* createScene(); CREATE_FUNC(GameLayer);public:GameLayer();~GameLayer();virtual bool init();//@biref 初始化地图void initMap() ;//@biref 更新m_mapStatevoid updateMapData() ;//@biref 重置m_mapState中的数据void resetMapData();virtual bool onTouchBegan(cocos2d::Touch *touch, cocos2d::Event *unused_event) ;virtual void onTouchMoved(cocos2d::Touch *touch, cocos2d::Event *unused_event) ;virtual void onTouchEnded(cocos2d::Touch *touch, cocos2d::Event *unused_event) ;//@biref 是否可以移动，参数：要移动的方向,是往加的方向移动还是往减的方向移动bool isCanMove(bool isMoveHor,bool moveAdd);private:Level * m_pLevel;//<关卡数据的引用cocos2d::Vector<RoleSprite*> m_pRoleSpriteVec ;//<存储角色精灵cocos2d::Vec2 m_touchBegin ;//<开始点击的位置cocos2d::Vec2 m_touchMove ;//<移动过程中的点float m_minDis ;//<最小移动距离，>=他的时候才判断是否移动RoleSprite * m_pSeleNode ;//<选中的角色int m_mapState[5][4] ;//<5行4列，0是空，1是已填充};#endif

 

GameLayer.cpp

#include "GameLayer.h"#include "RoleSprite.h"#include "data/Role.h"#include "data/Level.h"USING_NS_CC ;Scene* GameLayer::createScene(){auto scene = Scene::create() ;auto layer = GameLayer::create() ;scene->addChild(layer);return scene ;}GameLayer::GameLayer():m_pLevel(nullptr),m_pSeleNode(nullptr),m_touchBegin(Vec2(0,0)),m_touchMove(Vec2(0,0)),m_minDis(0){m_pLevel = Level::s_levelVec.at(0) ;CC_SAFE_RETAIN(m_pLevel) ;m_minDis = 20.0f ;}GameLayer::~GameLayer(){CC_SAFE_RELEASE_NULL(m_pLevel) ;}bool GameLayer::init(){Size size = Director::getInstance()->getWinSize();auto bgSprite = Sprite::create("main_bg0.png") ;bgSprite->setPosition(size.width / 2,size.height / 2) ;addChild(bgSprite);initMap() ;auto lisener = EventListenerTouchOneByOne::create() ;lisener->onTouchBegan = CC_CALLBACK_2(GameLayer::onTouchBegan,this) ;lisener->onTouchMoved = CC_CALLBACK_2(GameLayer::onTouchMoved,this) ;lisener->onTouchEnded = CC_CALLBACK_2(GameLayer::onTouchEnded,this);_eventDispatcher->addEventListenerWithSceneGraphPriority(lisener,this) ;return true ;}void GameLayer::initMap(){Size size = Director::getInstance()->getWinSize();float x = 0 ;float y = 0 ;float paddingLeft   = 10.0f ;float paddingBottom = 53.0f ;for (unsigned i = 0 ; i < m_pLevel->getRoleID().size() ;i++){Role * pRole = Role::s_roleVec.at(m_pLevel->getRoleID().at(i)) ;Sprite * pp = Sprite::create(pRole->getImageName()->getCString());int col = m_pLevel->getRolePos().at(i).x ;int row = m_pLevel->getRolePos().at(i).y ;x = paddingLeft + col * 1.0f * 75.0f ;y = paddingBottom + row * 1.0f * 75.0f ;RoleSprite * pRoleSprite = RoleSprite::create(pRole,row,col,Rect(x,y,pp->getContentSize().width,pp->getContentSize().height),this,this->getLocalZOrder()) ;m_pRoleSpriteVec.pushBack(pRoleSprite) ;}updateMapData() ;}bool GameLayer::onTouchBegan(Touch *touch, Event *unused_event){auto loction = this->convertToNodeSpace(touch->getLocation()) ;for (unsigned int i = 0 ; i < m_pRoleSpriteVec.size() ; i++){RoleSprite * pRoleSprite = m_pRoleSpriteVec.at(i) ;if (pRoleSprite->getBoundingBox().containsPoint(loction)){//得到点击的位置和选中的角色m_touchBegin = loction ;m_pSeleNode = pRoleSprite ;break;}}return true ;}void GameLayer::onTouchMoved(Touch *touch, Event *unused_event){//角色移动过程中或者角色为null的时候不需要检测是否移动if ((m_pSeleNode && m_pSeleNode->getNumberOfRunningActions() > 0) || !m_pSeleNode){return ;}auto loction = this->convertToNodeSpace(touch->getLocation()) ;m_touchMove = loction ;float dis = m_touchMove.getDistance(m_touchBegin) ;//触点移动的距离auto var = m_touchMove - m_touchBegin ;auto moveByPos = Vec2(0,0) ;auto varColRow = Vec2(0,0) ;if (dis >= m_minDis)//移动{bool isMoveHor = abs(var.x) > abs(var.y) ;//判断是检测竖直方向的移动还是水平方向的移动bool isMoveTop  ;//<如果是竖直方向上，判断是向上还是向下bool isMoveRight ;//<如果是水平方向上，判断死向右还是向左if (isMoveHor)//水平方向移动{isMoveRight = var.x > 0 ;if (var.x > 0)//right{moveByPos = Vec2(75.0f,0) ;varColRow = Vec2(1,0) ;}else//left{moveByPos = Vec2(-75.0f,0) ;varColRow = Vec2(-1,0) ;}}else//竖直方向移动{isMoveTop = var.y > 0 ;if (var.y > 0)//top{moveByPos = Vec2(0,75.0f) ;varColRow = Vec2(0,1) ;}else//bottom{moveByPos = Vec2(0,-75.0f) ;varColRow = Vec2(0,-1) ;}}if (isCanMove(isMoveHor,isMoveHor ? isMoveRight : isMoveTop)){m_pSeleNode->setCol(m_pSeleNode->getCol() + (int)varColRow.x) ;m_pSeleNode->setRow(m_pSeleNode->getRow() + (int)varColRow.y) ;m_pSeleNode->runAction(MoveBy::create(0.5f,moveByPos)) ;updateMapData() ;//更新地图的状态}}}void GameLayer::onTouchEnded(Touch *touch, Event *unused_event){//重置m_touchBegin = Vec2(0,0) ;m_touchMove = Vec2(0,0) ;m_pSeleNode = nullptr ;}bool GameLayer::isCanMove(bool isMoveHor,bool moveAdd){bool isMove = false;CCAssert(m_pSeleNode,"select node should not is null!!") ;int width = m_pSeleNode->getWidth() ;int height = m_pSeleNode->getHeight() ;int row = m_pSeleNode->getRow() ;int col = m_pSeleNode->getCol() ;if (isMoveHor)//水平方向{if (moveAdd){int colTem = col + width;int rowTem = row ; int filledNum = 0 ; for (int i = 0; i < height ; i++) {rowTem += i;if (m_mapState[rowTem][colTem] == 1){filledNum++ ;} }isMove = (filledNum == 0) ? true : false;if (m_pSeleNode->getCol() == 3){isMove = false ;}}else{int colTem = col - 1;int rowTem = row ;int filledNum = 0 ;for (int i = 0; i < height ; i++){rowTem += i;if (m_mapState[rowTem][colTem] == 1){filledNum++ ;}}isMove = (filledNum == 0) ? true : false;if (m_pSeleNode->getCol() == 0){isMove = false ;}}}else//竖直方向{if (moveAdd){int colTem = col ;int rowTem = row + height ;int filledNum = 0 ;for (int i = 0; i < width; i++){colTem += i;if (m_mapState[rowTem][colTem] == 1){filledNum++ ;}}isMove = (filledNum == 0) ? true : false;if (m_pSeleNode->getHeight() == 2){if (m_pSeleNode->getRow() == 3){isMove = false ;}}else{if (m_pSeleNode->getRow() == 4){isMove = false ;}}}else{int colTem = col ;int rowTem = row - 1 ;int filledNum = 0 ;for (int i = 0; i < width; i++){colTem += i;if (m_mapState[rowTem][colTem] == 1){filledNum++ ;}}isMove = (filledNum == 0) ? true : false;if (m_pSeleNode->getRow() == 0)//在最下层的时候，就不能再往下动了{isMove = false ;}}}return isMove ;}void GameLayer::updateMapData(){resetMapData() ;if (m_pRoleSpriteVec.size() == 10)//<需要10个角色1Boss，5将军，4兵{for (unsigned int i = 0 ;i < m_pRoleSpriteVec.size() ;i++){RoleSprite * pRoleSprite = m_pRoleSpriteVec.at(i) ;int width = pRoleSprite->getWidth() ;int heigit = pRoleSprite->getHeight() ;int row = pRoleSprite->getRow() ;int col = pRoleSprite->getCol() ;for (int i = 0 ; i < heigit ; i++){for (int j = 0 ; j < width ; j++){m_mapState[row + i][col + j] = 1 ;}}}}/*CCLOG("================Test==========================") ;for (int i = 0; i < 5 ; i++){const char *ppp = "" ;for (int j = 0; j < 4; j++){ppp = CCString::createWithFormat("%s%d,",ppp,m_mapState[i][j])->getCString() ;}CCLOG(ppp) ;}*/}void GameLayer::resetMapData(){for (int row = 0 ;row < 5 ; row++){for (int col = 0 ; col < 4 ; col++){m_mapState[row][col] = 0; }}}

 源码：http://download.csdn.net/detail/c_boy_lu/8594823