忍者无敌-实例讲解Cocos2d-x瓦片地图

标签：cocos2d-x   游戏   开发人员   

实例比较简单，如图所示，地图上有一个忍者精灵，玩家点击他周围的上、下、左、右，他能够向这个方向行走。当他遇到障碍物后是无法穿越的，障碍物是除了草地以为部分，包括了：树、山、河流等。

忍者实例地图（TODO用这个精灵替换图中的）

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__


#include "cocos2d.h"


class HelloWorld : public cocos2d::Layer
{
	cocos2d::TMXTiledMap* _tileMap;										①
     cocos2d::Sprite *_player; 											②
public:
    static cocos2d::Scene* createScene();


    virtual bool init(); 


    CREATE_FUNC(HelloWorld);
};


#endif // __HELLOWORLD_SCENE_H__

bool HelloWorld::init()
{
	if ( !Layer::init() )
	{
		return false;
	}


	Size visibleSize = Director::getInstance()->getVisibleSize();
	Point origin = Director::getInstance()->getVisibleOrigin();


	_tileMap = TMXTiledMap::create("map/MiddleMap.tmx");							①
	addChild(tileMap,0,100);												②


	TMXObjectGroup* group = _tileMap ->getObjectGroup("objects");					③
	ValueMap spawnPoint = group->getObject("ninja");								④


	float x = spawnPoint["x"].asFloat();										⑤
	float y = spawnPoint["y"].asFloat();										⑥


	_player = Sprite::create("ninja.png");										⑦
	_player ->setPosition(Point(x,y));											⑧
	addChild(_player, 2,200);


	return true;
}

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__


#include "cocos2d.h"


class HelloWorld : public cocos2d::Layer
{
	cocos2d::TMXTiledMap* _tileMap;										
     cocos2d::Sprite *_player; 											
public:
    static cocos2d::Scene* createScene();


    virtual bool init(); 


	virtual bool onTouchBegan(cocos2d::Touch* touch, cocos2d::Event* event); 			①
    virtual void onTouchMoved(cocos2d::Touch *touch, cocos2d::Event *event);
    virtual void onTouchEnded(cocos2d::Touch *touch, cocos2d::Event *event); 			②


    CREATE_FUNC(HelloWorld);
};


#endif // __HELLOWORLD_SCENE_H__

bool HelloWorld::init()
{
	… …
	setTouchEnabled(true);
    //设置为单点触摸
   setTouchMode(Touch::DispatchMode::ONE_BY_ONE);


	return true;
}

bool HelloWorld::onTouchBegan(Touch* touch, Event* event)
{
    log("onTouchBegan");
    return true;
}


void HelloWorld::onTouchMoved(Touch *touch, Event *event)
{
    log("onTouchMoved");
}


void HelloWorld::onTouchEnded(Touch *touch, Event *event)
{
    log("onTouchEnded");
		
	Point touchLocation = touch->getLocation();    								①


    Point playerPos = _player->getPosition();									②
    Point diff = touchLocation - playerPos;									③
    
    if (abs(diff.x) > abs(diff.y)) {											④
        if (diff.x > 0) {													⑤
            playerPos.x += _tileMap->getTileSize().width;
            _player->runAction(FlipX::create(false));								⑥
        } else {
            playerPos.x -= _tileMap->getTileSize().width;
            _player->runAction(FlipX::create(true));								⑦
        }
    } else {
        if (diff.y > 0) {													⑧
            playerPos.y += _tileMap->getTileSize().height;
        } else {
            playerPos.y -= _tileMap->getTileSize().height;
        }
    }
	_player->setPosition(playerPos);											⑨
}

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__


#include "cocos2d.h"
#include "SimpleAudioEngine.h"




class HelloWorld : public cocos2d::Layer
{
	cocos2d::TMXTiledMap* _tileMap;
	cocos2d::TMXLayer* _collidable;											①
   cocos2d::Sprite *_player;
public:
    static cocos2d::Scene* createScene();
    virtual bool init(); 


	virtual bool onTouchBegan(cocos2d::Touch* touch, cocos2d::Event* event);
    virtual void onTouchMoved(cocos2d::Touch *touch, cocos2d::Event *event);
    virtual void onTouchEnded(cocos2d::Touch *touch, cocos2d::Event *event);
	
	void setPlayerPosition(cocos2d::Point position);								②
cocos2d::Point tileCoordFromPosition(cocos2d::Point position);					③


    CREATE_FUNC(HelloWorld);
};


#endif // __HELLOWORLD_SCENE_H__

bool HelloWorld::init()
{
	if ( !Layer::init() )
	{
		return false;
	}


	Size visibleSize = Director::getInstance()->getVisibleSize();
	Point origin = Director::getInstance()->getVisibleOrigin();


	_tileMap = TMXTiledMap::create("map/MiddleMap.tmx");
	addChild(_tileMap,0,100);


	TMXObjectGroup* group = _tileMap->getObjectGroup("objects");
	ValueMap spawnPoint = group->getObject("ninja");


	float x = spawnPoint["x"].asFloat();
	float y = spawnPoint["y"].asFloat();


	_player = Sprite::create("ninja.png");
	_player->setPosition(Point(x,y));
	addChild(_player, 2, 200);


	_collidable = _tileMap->getLayer("collidable");									①
   _collidable->setVisible(false);											②


	setTouchEnabled(true);
	//设置为单点触摸
	setTouchMode(Touch::DispatchMode::ONE_BY_ONE);


	return true;
}

HelloWorld::onTouchEnded代码如下：
void HelloWorld::onTouchEnded(Touch *touch, Event *event)
{
	log("onTouchEnded");


	//获得在OpenGL坐标
	Point touchLocation = touch->getLocation();		


	Point playerPos = _player->getPosition();	
	Point diff = touchLocation - playerPos;	


	if (abs(diff.x) > abs(diff.y)) {		
		if (diff.x > 0) {
			playerPos.x += _tileMap->getTileSize().width;
			_player->runAction(FlipX::create(false));
		} else {
			playerPos.x -= _tileMap->getTileSize().width;
			_player->runAction(FlipX::create(true));
		}
	} else {
		if (diff.y > 0) {
			playerPos.y += _tileMap->getTileSize().height;
		} else {
			playerPos.y -= _tileMap->getTileSize().height;
		}
	}
	this->setPlayerPosition(playerPos);										①
}

void HelloWorld::setPlayerPosition(Point position)								
{
	//从像素点坐标转化为瓦片坐标
	Point tileCoord =  this->tileCoordFromPosition(position);							①
	//获得瓦片的GID
	int tileGid = _collidable->getTileGIDAt(tileCoord);								②


	if (tileGid > 0) {														③
		Value prop = _tileMap->getPropertiesForGID(tileGid);							④
		ValueMap propValueMap = prop.asValueMap();								⑤


		std::string collision = propValueMap["Collidable"].asString();						⑥
		
		if (collision == "true") { //碰撞检测成功									⑦
			CocosDenshion::SimpleAudioEngine::getInstance()->playEffect("empty.wav");		⑧
			return ;
		}
	}
	_player->setPosition(position);
}

Point HelloWorld::tileCoordFromPosition(Point pos) 								
{
	int x = pos.x / _tileMap->getTileSize().width; 									①
	int y = ((_tileMap->getMapSize().height * _tileMap->getTileSize().height) - pos.y) /
													 _tileMap->getTileSize().height; 		②
	return Point(x,y);
}

void HelloWorld::setViewpointCenter(Point position)
{
    Size visibleSize = Director::getInstance()->getVisibleSize();
int x = MAX(position.x, visibleSize.width / 2);								①
    int y = MAX(position.y, visibleSize.height / 2);								②  
    x = MIN(x, (_tileMap->getMapSize().width * _tileMap->getTileSize().width)
            - visibleSize.width / 2);											③
    y = MIN(y, (_tileMap->getMapSize().height * _tileMap->getTileSize().height)
            - visibleSize.height/2);											④


    //屏幕中心点
    Point pointA = Point(visibleSize.width/2, visibleSize.height/2); 					⑤
	//使精灵处于屏幕中心，移动地图目标位置
    Point pointB = Point(x, y); 											⑥
		log("目标位置 (%f ,%f) ",pointB.x,pointB.y);


    //地图移动偏移量
Point offset =pointA - pointB; 											⑦


    log("offset (%f ,%f) ",offset.x, offset.y);
	this->setPosition(offset);												⑧
}

移动地图

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忍者无敌-实例讲解Cocos2d-x瓦片地图

标签：cocos2d-x   游戏   开发人员   

原文地址：http://blog.csdn.net/tonny_guan/article/details/39375383