贪吃蛇的C语言实现（使用EasyX图形库）

/***************** (C) COPYRIGHT 2016 Panda_Xiao ************************ * File Name : play.cpp * Author : Panda_Xiao * Date First Issued : 2016/07/02 * Description : 游戏的进行的整体逻辑 * ************************************************************************* * History: ************************************************************************/ /* Includes -----------------------------------------------------------*/ #include "head.h" /* Variables ----------------------------------------------------------*/ extern char g_gameBoard[][X_ROCK_SQUARE_NUM] ; extern int g_rockNum ; extern RockLocation_t rockArray[1000] ; extern int g_grade ; extern int g_score ; /* Function prototypes ------------------------------------------------*/ void InitProc(void); void SetOccupy(void); void MovetoUp(void); void MovetoDown(void); void MovetoLeft(void); void MovetoRight(void); void IsGameover(void); /************************************************************************ * Function Name : PlayGame * Create Date : 2016/07/02 * Author : Panda_Xiao * Description : 游戏进行的主要流程 * Param : None * Return Code : None * Global Variable : rockArray[] g_gameBoard[][] g_rockNum g_score * File Static Variable : backGameBoard[][] * Function Static Variable : None ************************************************************************/ void PlayGame(void) { int userHitChar ; //从键盘获取的字符 FoodLocation_t food ; //食物的信息 RockLocation_t backrockArray[1000] ; //蛇身移动之前的方块信息 DWORD oldtime = 0 ; int i ; int j ; //初始化前3个方块的位置和方向 rockArray[0].left = X_GUI_PIX/2 ; rockArray[0].top = Y_GUI_PIX/2 ; rockArray[0].direction = DIRECT_RIGHT ; rockArray[1].left = X_GUI_PIX/2-ROCK_SQUARE_WIDTH ; rockArray[1].top = Y_GUI_PIX/2 ; rockArray[1].direction = DIRECT_RIGHT ; rockArray[2].left = X_GUI_PIX/2-2*ROCK_SQUARE_WIDTH ; rockArray[2].top = Y_GUI_PIX/2 ; rockArray[2].direction = DIRECT_RIGHT ; g_rockNum = 3 ; InitProc() ; //设置游戏墙的占位信息 SetOccupy() ; //设置蛇身的占位信息 //随机生成食物的位置 srand(time(NULL)) ; food.left = (rand()%(X_ROCK_SQUARE_NUM-2)+1) ; food.top = (rand()%(Y_ROCK_SQUARE_NUM-2)+1) ; //当食物出现的位置在蛇身上，重新生成食物的位置 while(g_gameBoard[food.top][food.left] == 1) { food.left = (rand()%(X_ROCK_SQUARE_NUM-2)+1) ; food.top = (rand()%(Y_ROCK_SQUARE_NUM-2)+1) ; } food.left *= ROCK_SQUARE_WIDTH ; food.top *= ROCK_SQUARE_WIDTH ; //游戏进行 while(1) { BeginBatchDraw() ; //画出蛇头，蛇身、蛇尾和食物 DrawHeadRock(&rockArray[0] , TRUE ) ; for(i=1;i<g_rockNum-1;i++) { DrawRock(&rockArray[i] , TRUE ) ; } DrawTailRock(&rockArray[g_rockNum-1] , TRUE ) ; DrawFood(&food , TRUE) ; //蛇头在接近食物之前头变大 switch(rockArray[0].direction) { case DIRECT_UP : if((rockArray[0].left == food.left) && (rockArray[0].top-10 == food.top)) { DrawHeadRock(&rockArray[0], FALSE) ; DrawBigHeadRock(&rockArray[0], TRUE) ; } break; case DIRECT_DOWN : if((rockArray[0].left == food.left) && (rockArray[0].top+10 == food.top)) { DrawHeadRock(&rockArray[0], FALSE) ; DrawBigHeadRock(&rockArray[0], TRUE) ; } break; case DIRECT_LEFT : if((rockArray[0].left-10 == food.left) && (rockArray[0].top == food.top)) { DrawHeadRock(&rockArray[0], FALSE) ; DrawBigHeadRock(&rockArray[0], TRUE) ; } break; case DIRECT_RIGHT : if((rockArray[0].left+10 == food.left) && (rockArray[0].top == food.top)) { DrawHeadRock(&rockArray[0], FALSE) ; DrawBigHeadRock(&rockArray[0], TRUE) ; } break; default : break ; } //当蛇头吃到食物的时候 if((rockArray[0].left == food.left) && (rockArray[0].top == food.top)) { DrawFood(&food , FALSE) ; //食物消失 g_score += 10 ; //得分加10 DrawScore() ; //更新得分显示 rockArray[g_rockNum] = rockArray[g_rockNum-1] ; DrawTailRock(&rockArray[g_rockNum-1] , FALSE ) ; //原蛇尾消失 //生成新蛇尾的位置和方向 switch(rockArray[g_rockNum-1].direction) { case DIRECT_UP : rockArray[g_rockNum].top += ROCK_SQUARE_WIDTH ; break ; case DIRECT_DOWN : rockArray[g_rockNum].top -= ROCK_SQUARE_WIDTH ; break ; case DIRECT_LEFT : rockArray[g_rockNum].left += ROCK_SQUARE_WIDTH ; break ; case DIRECT_RIGHT : rockArray[g_rockNum].left -= ROCK_SQUARE_WIDTH ; break ; default : break ; } DrawRock(&rockArray[g_rockNum-1] , TRUE ) ; //新增一蛇身 DrawTailRock(&rockArray[g_rockNum] , TRUE ) ; //显示新蛇尾 g_rockNum ++ ; //蛇身方块数量加一 //重新设置占位信息 for(i=0;i<X_ROCK_SQUARE_NUM;i++) { for(j=0;j<Y_ROCK_SQUARE_NUM;j++) { g_gameBoard[j][i] = 0 ; } } InitProc() ; SetOccupy() ; //重新生成食物的位置 srand(time(NULL)) ; food.left = (rand()%(X_ROCK_SQUARE_NUM-2)+1) ; food.top = (rand()%(Y_ROCK_SQUARE_NUM-2)+1) ; while(g_gameBoard[food.top][food.left] == 1) { food.left = (rand()%(X_ROCK_SQUARE_NUM-2)+1) ; food.top = (rand()%(Y_ROCK_SQUARE_NUM-2)+1) ; } food.left *= ROCK_SQUARE_WIDTH ; food.top *= ROCK_SQUARE_WIDTH ; DrawFood(&food , TRUE ) ; } //在蛇身改变位置之前，储存其位置和方向信息 for(i=0;i<g_rockNum;i++) { backrockArray[i] = rockArray[i] ; } //时间到了，蛇身自动往蛇头移动方向前进一格 DWORD newtime = GetTickCount() ; if(newtime - oldtime >= (unsigned int)(240-40*g_grade)) { oldtime = newtime ; //根据蛇头移动的方向向该方向移动一格 switch(rockArray[0].direction) { case DIRECT_UP : MovetoUp() ; break ; case DIRECT_DOWN : MovetoDown() ; break ; case DIRECT_LEFT : MovetoLeft() ; break ; case DIRECT_RIGHT : MovetoRight() ; break ; default : break ; } } //检测有无键盘输入 if(kbhit()) { //从键盘获取一个字符 userHitChar = getch() ; //除了不能后退以外，根据键盘输入字符蛇身可向三个方向移动 switch(userHitChar) { case 'w' : if(rockArray[0].direction != DIRECT_DOWN) MovetoUp() ; break ; case 's' : if(rockArray[0].direction != DIRECT_UP) MovetoDown() ; break ; case 'a' : if(rockArray[0].direction != DIRECT_RIGHT) MovetoLeft() ; break ; case 'd' : if(rockArray[0].direction != DIRECT_LEFT) MovetoRight() ; break ; // 按q暂停和开始 case 'q' : while(1) { if(getch()=='q') break; } break ; default : break ; } } //更新占位信息 for(i=0;i<X_ROCK_SQUARE_NUM;i++) { for(j=0;j<Y_ROCK_SQUARE_NUM;j++) { g_gameBoard[j][i] = 0 ; } } InitProc() ; SetOccupy() ; //批量画图，避免闪烁 FlushBatchDraw(); //原蛇身消失 DrawBigHeadRock(&backrockArray[0], FALSE) ; DrawHeadRock(&backrockArray[0] , FALSE ) ; for(i=1;i<g_rockNum-1;i++) { DrawRock(&backrockArray[i] , FALSE) ; } DrawTailRock(&backrockArray[g_rockNum-1] , FALSE) ; } } /************************************************************************ * Function Name : InitProc * Create Date : 2016/07/02 * Author : Panda_Xiao * Description : 设置围墙的占位信息 * Param : None * Return Code : None * Global Variable : g_gameBoard[][] * File Static Variable : None * Function Static Variable : None ************************************************************************/ void InitProc(void) { int i ; //设置上下墙的占位 for(i=0;i<X_ROCK_SQUARE_NUM;i++) { g_gameBoard[0][i] = 1