二维游戏编程基础

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1、2D游戏编程基础浙江大学软件学院梁秀波Email：liangxb@cst.zju.edu.cn主要内容二维游戏简单框架图像文件结构(以BMP为例）图像显示（例程）典型图像操作典型的图像特效原理二维游戏（例程）课程目标理解图像概念图像操作的实现简单的图像特效简单的二维游戏1.初始化2.进入游戏循环3.查询用户输入状态4.执行游戏逻辑和AI判断5.绘制图像6.循环7.退出游戏循环的基本步骤1.初始化2.进入游戏循环3.查询用户输入状态4.执行游戏逻辑和AI判断5.绘制图像6.循环7.退出游戏循环的基本步骤Demo:Airplane演示GameRunGameInitGameMen

2、uGameRestartGameExitGameStarting//definesforgameloopstates#defineGAME_INIT1//thegameisinitializing#defineGAME_MENU2//thegameisinthemenu#defineGAME_STARTING3//thegameisabouttorun#defineGAME_RUN4//thegameisnowrunning#defineGAME_RESTART5//thegameisgoingtorestart#defineGAME_EXIT6//thegameisexi

3、ting//gameglobalsintgame_state=GAME_INIT;//startoffinthisstateInterror=0;//usedtosenderrorsbacktoOS//mainbeginshereVoidmain(){//implementationofmaingameloopWhile(game_state!=GAME_EXIT){//implementationofmaingameloopswitch(game_state){caseGAME_INIT://thegameisinitializing{//allocateallmemor

4、yandresourcesInit();game_state=GAME_MENU;}break;caseGAME_MENU://thegameisinthemenu{//callthemainmenufunctionandletitswitchstatesgame_state=Menu();//note:wecouldforceaRUNstatehere}break;caseGAME_STARTING://thegameisabouttorun{//thisstateisoptional,butusuallyusedtosetthingsupright//beforethe

5、gameisrunyoumightdoalittlemorehousekeepingSetup_For_Run();//switchtorunstategame_state=GAME_RUN;}break;caseGAME_RUN://thegameisnowrunning{//thissectioncontainstheentiregamelogicloopClear();//clearthedisplayGet_Input();//gettheinputDo_Logic();//performlogicandAIRender_Frame();//displaythene

6、xtframeofanimationWait();//synchronizethedisplay//theonlywaythatstatecanbechangedisthruuserinteraction//intheinputsectionorbymaybelosingthegame.}break;caseGAME_RESTART://thegameisrestarting{//thissectionisacleanupstateusedtofixupanylooseends//beforerunningagainFixup();//switchstatesbacktot

7、hemenugame_state=GAME_MENU;}break;caseGAME_EXIT://thegameisexiting{//ifthegameisinthisstatethenit’stimetobail,killeverything//andcrossyourfingersRelease_And_Cleanup();error=0;//settheerrorwordtowhatever//note:wedonothavetoswitchstatessincewearealreadyinthissta