chapter12 实验手册.docx

1、chapter12 实验手册第12章 网络游戏编程网络坦克大战客户端的实现（一）准备工作：1. 新建cocos2d-x项目2. 游戏资源从光盘拷贝到Resources目录下3. 将ODSocket加入到Classes下并在VS工程中添加这些已有项，结构如图：4. 将HelloWorld场景相关的头文件和cpp文件删除，同时把对这个场景的所有引用删除（二）编写全局常量配置文件Global.h，方便常用数值的访问#ifndef _GLOBAL_H_#define _GLOBAL_H_#define WINDOWHEIGHT Director:getInstance()-getVisibleSize

2、().height#define WINDOWWIDTH Director:getInstance()-getVisibleSize().width#endif（三）实体类的封装实体类的继承关系如下图：（1） 实体类基类BaseObject的封装：#ifndef _BASE_OBJECT_H_#define _BASE_OBJECT_H_#include cocos2d.hUSING_NS_CC;using namespace cocos2d;class BaseObject : public Spritepublic: BaseObject() ; virtual BaseObject()

3、; CREATE_FUNC(BaseObject); virtual bool init(); / set and get int getLife() return m_life ; ; float getSpeed() return m_speed; ; int getKind() return m_kind ; ; int getDirection() return m_direction; ; int getLevel() return m_level; ; int getID() return m_ID; ; int getHindered() return m_hindered; ;

4、 void setLife(int l) m_life = l; ; void setSpeed(float s) m_speed = s; ; void setDirection(float d) m_direction = d; ; void setKind(int k) m_kind = k; ; void setLevel(int lev) m_level = lev; ; void setID(int id) m_ID = id; ; void setHindered(int hindered) m_hindered = hindered; ; private: int m_ID;

5、/ OBJECT的ID float m_speed; / OBJECT的移动速度 int m_life; / OBJECT的生命值(或有效值) int m_direction; / OBJECT移动的方向 int m_kind; / OBJECT所属的类型,在不同的派生类中有不同的意思 int m_level; / OBJECT等级 int m_hindered; / OBJECT在四个方向上是否受到阻碍up.down.left.right;#endif该类主要定义了基类的属性和方法，绝大多数方法都在头文件提供了简单的实现，实现文件只提供了init方法的实现：#include BaseObje

6、ct.hbool BaseObject:init() if (!Sprite:init() return false; return true;（2） 坦克类Tank的封装：#ifndef _TANK_H_#define _TANK_H_#include BaseObject.h#include cocos2d.h#include cocostudio/CocoStudio.h#include ui/CocosGUI.h#include Global.h#include Bullet.hUSING_NS_CC;using namespace cocos2d;using namespace co

7、costudio;using namespace cocos2d:ui;#define TANKBASELIFE 1 / TANK基础生命#define TANKSPEED 1 / TANK默认速度#define TANKSIZE 32 / TANK尺寸大小#define TANK_UP 1 / TANK向上状态#define TANK_DOWN 2 / TANK向下状态#define TANK_LEFT 3 / TANK向左状态#define TANK_RIGHT 4 / TANK向右状态#define TANK_STAY 5 / TANK停止状态class Tank : public Ba

8、seObjectpublic: static Tank* create(int ID, float x, float y, int dir, int kind); void MoveUP(); void MoveDown(); void MoveLeft(); void MoveRight(); void Fire(); void Stay(int dir); void Blast(); / 爆炸时已自动设置life为0 bool isMoving() return m_isMoving; ; Rect getRect() return m_rect; ; Vector getBulletLi

9、st() return m_bulletList; ;private: virtual bool init(int ID, float x, float y, int dir, int kind); void Draw(); void update(float t); void deleteObj(Sprite* obj);private: Sprite* m_sprite; / 图片精灵 Texture2D* m_texture; / 保存texture Vector m_bulletList; / 子弹列表 bool m_moveUp; / 坦克往上移动 bool m_moveDown;

10、/ 坦克往下移动 bool m_moveLeft; / 坦克往左移动 bool m_moveRight; / 坦克往右移动 float m_frametime; / 切换图片时间步长 float m_temptime; / 每经过temptime切换图片 int m_texchange; / 坦克履带纹理切换控制 Rect m_rect; / 坦克包围框 bool m_isMoving; / 坦克正在移动 int m_textureX; int m_textureY;#endifTank中主要的注意点在Tank的爆炸Blatant完成之后需要销毁自己，所以需要实现一个对应的销毁自己的方法：de

11、leteObj，实现文件如下：#include Tank.hTank* Tank:create(int ID, float x, float y, int dir, int kind) Tank* pRet = new(std:nothrow) Tank(); if (pRet & pRet-init(ID, x, y, dir, kind) pRet-autorelease(); return pRet; else delete pRet; pRet = NULL; return NULL; bool Tank:init(int ID, float x, float y, int dir,

12、int kind) if (!BaseObject:init() return false; Director:getInstance()-setProjection(Director:Projection:_2D); / 改为正交投影，避免图片模糊 setLife(TANKBASELIFE); / tank life setSpeed(TANKSPEED); / tank speed setLevel(1); / tank level setHindered(TANK_STAY); / tank hindered m_moveUp = FALSE; m_moveDown = FALSE; m

13、_moveRight = FALSE; m_moveLeft = FALSE; m_isMoving = false; m_frametime = 2.0; m_temptime = 0; / tank init ifo setID(ID); this-setPositionX(x); this-setPositionY(y); setDirection(dir); setKind(kind); / tank kind if (kind = 1) m_texture = Director:getInstance()-getTextureCache()-addImage(Chapter12/ta

14、nk/player1.png); if (kind = 2) m_texture = Director:getInstance()-getTextureCache()-addImage(Chapter12/tank/player2.png); / tank initY state m_textureX = (this-getLevel() - 1) * 4 + 1) * 14; if (dir 0 & dir 0 & dir 0 & dir 0 & dir getPositionX() - 16, this-getPositionY() - 16, 32, 32); m_sprite-setP

15、osition(Vec2:ZERO); m_sprite-setScale(TANKSIZE/28); this-addChild(m_sprite); this-scheduleUpdate(); return true;void Tank:MoveUP() m_moveUp = true; m_moveDown = false; m_moveLeft = false; m_moveRight = false; setDirection(TANK_UP);void Tank:MoveDown() m_moveDown = true; m_moveUp = false; m_moveLeft

16、= false; m_moveRight = false; setDirection(TANK_DOWN);void Tank:MoveLeft() m_moveLeft = true; m_moveDown = false; m_moveRight = false; m_moveUp = false; setDirection(TANK_LEFT);void Tank:MoveRight() m_moveRight = true; m_moveLeft = false; m_moveUp = false; m_moveDown = false; setDirection(TANK_RIGHT

17、);void Tank:Fire() Vec2 position; switch (this-getDirection() case TANK_UP: position = Vec2(this-getPositionX(), this-getPositionY() + 14); break; case TANK_DOWN: position = Vec2(this-getPositionX(), this-getPositionY() - 14); break; case TANK_LEFT: position = Vec2(this-getPositionX() - 14, this-get

18、PositionY(); break; case TANK_RIGHT: position = Vec2(this-getPositionX() + 14, this-getPositionY(); break; auto bullet = Bullet:create(position, 3, this-getDirection(); m_bulletList.pushBack(bullet); / 添加到子弹列表 this-getParent()-addChild(bullet, 8); / 添加到游戏场景void Tank:Draw() if(this-getLife() m_textur

19、eX = (this-getLevel() - 1) * 4 + 1) * 14; / get tank textureX / 控制坦克履带转动 if (m_moveUp | m_moveDown | m_moveLeft | m_moveRight) m_temptime += m_frametime; if(m_temptime 5) m_temptime -= 5; m_texchange = (m_texchange+1) % 2; switch (m_texchange) case 0: m_textureX = (this-getLevel() - 1) * 4 + 1) * 14

20、; break; case 1: m_textureX = (this-getLevel() - 1) * 4 + 1) * 14 + 2*14; break; this-removeChild(m_sprite, true); / 重要：把前一个精灵移除,避免内存无法释放 m_sprite = Sprite:createWithTexture(m_texture, Rect(m_textureX-14.0, m_textureY-14.0, 28, 28); m_sprite-setScale(TANKSIZE/28); this-addChild(m_sprite); / 更新精灵图片 v

21、oid Tank:Blast() this-setVisible(false); / 坦克消失 this-setLife(0); auto explode = Sprite:create(Chapter12/tank/explode2.png); this-getParent()-addChild(explode); explode-setPosition(this-getPosition(); / 显示爆炸 explode-runAction(Sequence:create( DelayTime:create(0.3f), FadeOut:create(0.3f), / 爆炸消失 CallF

22、unc:create(CC_CALLBACK_0(Tank:deleteObj, this, explode), NULL );void Tank:update(float t) m_isMoving = m_moveUp | m_moveDown | m_moveLeft | m_moveRight; / 更新移动状态 m_rect = Rect(this-getPositionX() - 16, this-getPositionY() - 16, 32, 32); / 更新rect for (int i = 0;i getLife() getLife() unscheduleUpdate(

23、); if (m_moveUp) m_textureY = 1*14; if (this-getPositionY() getHindered() != TANK_UP) setHindered(TANK_STAY); this-setPositionY(this-getPositionY() + this-getSpeed(); Draw(); if (m_moveDown) m_textureY = 5*14; if (this-getPositionY() = 14) & (this-getHindered() != TANK_DOWN) setHindered(TANK_STAY);

24、this-setPositionY(this-getPositionY() - this-getSpeed(); Draw(); if (m_moveLeft) m_textureY = 7*14; if (this-getPositionX() = 14) & (this-getHindered() != TANK_LEFT) setHindered(TANK_STAY); this-setPositionX(this-getPositionX() - this-getSpeed(); Draw(); if (m_moveRight) m_textureY = 3*14; if (this-

25、getPositionX() getHindered() != TANK_RIGHT) setHindered(TANK_STAY); this-setPositionX(this-getPositionX() + this-getSpeed(); Draw(); void Tank:Stay(int dir) switch (dir) case TANK_UP: m_moveUp = false; this-setPositionY(this-getPositionY() - 1); break; case TANK_DOWN: m_moveDown = false; this-setPos

26、itionY(this-getPositionY() + 1); break; case TANK_LEFT: m_moveLeft = false; this-setPositionX(this-getPositionX() + 1); break; case TANK_RIGHT: m_moveRight = false; this-setPositionX(this-getPositionX() - 1); break; void Tank:deleteObj(Sprite* obj) obj-removeFromParent(); this-removeFromParent();（3） 子弹类Bullet的封装，子弹相对简单，只涉及到方向、速度、爆炸以及自身销毁等操作，实现起来比较简单，对应的头文件和实现文件如下：#ifndef _BULLET_H_ / Bullet.h#define _BULLET_H_#include BaseObject.h#include Global.h#define BULLET_UP 1 / BULLET向上状态#define BULLET_DOWN 2 / BULLET向下状态#define BULLET_LEFT 3 / BULLET向左状态#define BULLET_RIGHT 4