cocos2d-x 45度斜地图的应用

原文地址：http://blog.csdn.net/dingxiaowei2013/article/details/11894879

前言：

我们在做经典的格斗类的游戏的时候，场景常常用的是45°斜地图来创建的。下面我就来实现一个简单的Demo来展现一下斜地图的使用。

功能实现：

1.倾斜地图的加载；

2.点击地图居中；

3.主角只能在一定的范围内移动；

4.鼠标点击屏幕，主角移动一格，如果连续点击则主句不断的移动；

代码实现：

图层要设置z轴属性，方便可以隐藏主角：

在图层的属性中加上 cc_vertexz -400

如果前面的图层那就设置为automatic

在AppDelegate添加代码：

//深度测试，方便实现遮盖效果
CCDirector::sharedDirector()->setDepthTest(true);
//Opengl渲染设置,如果地图有背景图层的话就需要加这句
CCDirector::sharedDirector()->setProjection(kCCDirectorProjection2D);

Player类：

#ifndef___5tilemap__Player__
#define___5tilemap__Player__

#include<iostream>
#include"cocos2d.h"
usingnamespacecocos2d;
classPlayer:publicCCSprite
{
public:
staticPlayer*create();
virtualboolinitPlayer();
voidupdateVertextZ(CCPointtilePos,CCTMXTiledMap*tileMap);
};
#endif/*defined(___5tilemap__Player__)*/

#include"Player.h"

staticPlayer*s;

Player*Player::create()
{
s=newPlayer();
if(s&&s->initPlayer()){
s->autorelease();
returns;
}
else
{
deletes;
s=NULL;
returnNULL;
}
}

boolPlayer::initPlayer()
{
if(!CCSprite::initWithFile("ninja.png")){
returnfalse;
}
returntrue;
}

voidPlayer::updateVertextZ(cocos2d::CCPointtilePos,cocos2d::CCTMXTiledMap*tileMap)
{
floatlowestZ=-(tileMap->getMapSize().width+tileMap->getMapSize().height);
floatcurrentZ=tilePos.x+tilePos.y;
this->setVertexZ(lowestZ+currentZ-1);
}

HelloWorld.h:

#ifndef__HELLOWORLD_SCENE_H__
#define__HELLOWORLD_SCENE_H__

#include"cocos2d.h"
#include"Player.h"
usingnamespacecocos2d;

typedefenum{
MoveDirectionNone=0,
MoveDirectionUpperLeft,
MoveDirectionLowerLeft,
MoveDirectionUpperRight,
MoveDirectionLowerRight,
MAX_MoveDirections
}EMoveDirection;

classHelloWorld:publiccocos2d::CCLayer
{
public:
//Method'init'incocos2d-xreturnsbool,insteadof'id'incocos2d-iphone(anobjectpointer)
virtualboolinit();

//there'sno'id'incpp,sowerecommendtoreturntheclassinstancepointer
staticcocos2d::CCScene*scene();

CREATE_FUNC(HelloWorld);

virtualvoidccTouchesBegan(CCSet*pTouches,CCEvent*pEvent);

CCPointlocationFromTouches(CCSet*touches);


Player*player;

CCPointplayableAreaMin,playableAreaMax;

//获取瓷砖块的坐标
CCPointtilePosFromLocation(CCPointlocation,CCTMXTiledMap*tilemap);

//图层居中
voidcenterTileMapOnTileCoord(CCPointtilePos,CCTMXTiledMap*tileMap);

virtualvoidccTouchesEnded(CCSet*pTouches,CCEvent*pEvent);

CCPointscreenCenter;

CCTMXTiledMap*tileMap;

CCRectupperLeft,lowerLeft,upperRight,lowerRight;

CCPointmoveOffsets[MAX_MoveDirections];

EMoveDirectioncurrentMoveDirection;

voidupdate(floatdelta);

CCPointensureTilePosIsWithinBounds(CCPointtilePos);
};

#endif//__HELLOWORLD_SCENE_H__

HelloWorldScene.cpp

#include"HelloWorldScene.h"
#include"SimpleAudioEngine.h"
#include"Player.h"

usingnamespacecocos2d;
usingnamespaceCocosDenshion;

CCScene*HelloWorld::scene()
{
//'scene'isanautoreleaseobject
CCScene*scene=CCScene::create();

//'layer'isanautoreleaseobject
HelloWorld*layer=HelloWorld::create();

//addlayerasachildtoscene
scene->addChild(layer);

//returnthescene
returnscene;
}

//on"init"youneedtoinitializeyourinstance
boolHelloWorld::init()
{
//1.superinitfirst
if(!CCLayer::init())
{
returnfalse;
}
CCSizesize=CCDirector::sharedDirector()->getWinSize();
//添加一个地图
CCTMXTiledMap*tileMap=CCTMXTiledMap::create("huohuo.tmx");
//CCTMXTiledMap*tileMap=CCTMXTiledMap::create("isometric.tmx");
//tileMap->setAnchorPoint(CCPointMake(size.width/2,size.height/2));
//tileMap->setPosition(CCPointMake(size.width/2,size.height/2));
CCSizes=tileMap->getContentSize();
CCLog("width:%f",-s.width/2);
tileMap->setPosition(ccp(-s.width/2,0));
this->addChild(tileMap,-1,1);
this->setTouchEnabled(true);
this->tileMap=tileMap;

//添加主角精灵
player=Player::create();
player->setPosition(CCPointMake(size.width/2,size.height/2));
player->setAnchorPoint(ccp(0.3f,0.1));
this->addChild(player);

constintborderSize=10;

playableAreaMin=CCPointMake(borderSize,borderSize);
playableAreaMax=CCPointMake(tileMap->getMapSize().width-1-borderSize,tileMap->getMapSize().height-1-borderSize);



screenCenter=CCPointMake(size.width/2,size.height/2);
upperLeft=CCRectMake(0,screenCenter.y,screenCenter.x,screenCenter.y);
lowerLeft=CCRectMake(0,0,screenCenter.x,screenCenter.y);
upperRight=CCRectMake(screenCenter.x,screenCenter.y,screenCenter.x,screenCenter.y);
lowerRight=CCRectMake(screenCenter.x,0,screenCenter.x,screenCenter.y);

moveOffsets[MoveDirectionNone]=CCPointZero;
moveOffsets[MoveDirectionUpperLeft]=CCPointMake(-1,0);
moveOffsets[MoveDirectionLowerLeft]=CCPointMake(0,1);
moveOffsets[MoveDirectionUpperRight]=CCPointMake(0,-1);
moveOffsets[MoveDirectionLowerRight]=CCPointMake(1,0);
currentMoveDirection=MoveDirectionNone;
//通过预约的更新方法来检查角色的移动
this->scheduleUpdate();

returntrue;
}

//返回点击的坐标点
CCPointHelloWorld::locationFromTouches(cocos2d::CCSet*touches)
{
CCTouch*touch=(CCTouch*)touches->anyObject();
returntouch->getLocation();
}

voidHelloWorld::ccTouchesBegan(cocos2d::CCSet*pTouches,cocos2d::CCEvent*pEvent)
{
//CCNode*node=this->getChildByTag(1);
//CCTMXTiledMap*tileMap=(CCTMXTiledMap*)node;
//CCPointtouchLocation=this->locationFromTouches(pTouches);
//CCPointtilepos=this->tilePosFromLocation(touchLocation,tileMap);
//CCLog("%f,%f",tilepos.x,tilepos.y);
//
//this->centerTileMapOnTileCoord(tilepos,tileMap);
//
//player->updateVertextZ(tilepos,tileMap);
CCTouch*touch=(CCTouch*)pTouches->anyObject();
CCPointtouchLocation=touch->getLocation();
if(upperLeft.containsPoint(touchLocation)){
currentMoveDirection=MoveDirectionUpperLeft;
}
elseif(lowerLeft.containsPoint(touchLocation))
{
currentMoveDirection=MoveDirectionLowerLeft;
}
elseif(upperRight.containsPoint(touchLocation))
{
currentMoveDirection=MoveDirectionUpperRight;
}
elseif(lowerRight.containsPoint(touchLocation))
{
currentMoveDirection=MoveDirectionLowerRight;
}
}

//获取瓷砖块的坐标
CCPointHelloWorld::tilePosFromLocation(cocos2d::CCPointlocation,cocos2d::CCTMXTiledMap*tilemap)
{
CCPointpos=ccpSub(location,tilemap->getPosition());

floathalfMapWidth=tilemap->getMapSize().width*0.5f;
floatmapHeight=tilemap->getMapSize().height;
floattileWidth=tilemap->getTileSize().width;
floattileHeight=tilemap->getTileSize().height;

CCPointtilePasDiv=ccp(pos.x/tileWidth,pos.y/tileHeight);
floatinverseTileY=mapHeight-tilePasDiv.y;
floatposX=(int)(inverseTileY+tilePasDiv.x-halfMapWidth);
floatposY=(int)(inverseTileY-tilePasDiv.x+halfMapWidth);

//posX=MAX(0,posX);
//posX=MIN(tilemap->getMapSize().width-1,posX);
//posY=MAX(0,posY);
//posY=MIN(tilemap->getMapSize().height-1,posY);

posX=MAX(playableAreaMin.x,posX);
posX=MIN(playableAreaMax.x,posX);
posY=MAX(playableAreaMin.y,posY);
posY=MIN(playableAreaMax.y,posY);

pos=CCPointMake(posX,posY);

returnpos;
}

//将地图居中
voidHelloWorld::centerTileMapOnTileCoord(cocos2d::CCPointtilePos,cocos2d::CCTMXTiledMap*tileMap)
{
//获取屏幕大小和屏幕中心点
CCSizesize=CCDirector::sharedDirector()->getWinSize();

CCPointscreenCenter=CCPointMake(size.width/2,size.height/2);

//获取地板层
CCTMXLayer*layer=tileMap->layerNamed("Ground");
//CCTMXLayer*layer=tileMap->layerNamed("GroundLayer1");

//仅仅在内部使用；瓷砖的Y坐标减去1
tilePos.y-=1;

//获取瓷砖块坐标
CCPointscrollPosition=layer->positionAt(tilePos);

//考虑到地图移动的情况，我将像素坐标信息乘以-1，从而得到负值
scrollPosition=ccpMult(scrollPosition,-1);

//为屏幕中央坐标添加位移值
scrollPosition=ccpAdd(scrollPosition,screenCenter);

CCMoveTo*move=CCMoveTo::create(.2f,scrollPosition);

tileMap->stopAllActions();
tileMap->runAction(move);
}

voidHelloWorld::update(floatdelta)
{
if(tileMap->numberOfRunningActions()==0){
if(currentMoveDirection!=MoveDirectionNone){
CCPointtilePos=this->tilePosFromLocation(screenCenter,tileMap);
CCPointoffset=moveOffsets[currentMoveDirection];
tilePos=CCPointMake(tilePos.x+offset.x,tilePos.y+offset.y);
tilePos=this->ensureTilePosIsWithinBounds(tilePos);
this->centerTileMapOnTileCoord(tilePos,tileMap);
}
}

//连续不断的修改角色的vertexz的值
CCPointtilePos=this->tilePosFromLocation(tilePos,tileMap);
player->updateVertextZ(tilePos,tileMap);
}

CCPointHelloWorld::ensureTilePosIsWithinBounds(CCPointtilePos)
{
tilePos.x=MAX(playableAreaMin.x,tilePos.x);
tilePos.x=MIN(playableAreaMax.x,tilePos.x);
tilePos.y=MAX(playableAreaMin.y,tilePos.y);
tilePos.y=MIN(playableAreaMax.y,tilePos.y);
returntilePos;
}

voidHelloWorld::ccTouchesEnded(cocos2d::CCSet*pTouches,cocos2d::CCEvent*pEvent)
{
currentMoveDirection=MoveDirectionNone;
}

实现效果：

源码下载：

http://download.csdn.net/detail/s10141303/6302839