這段代碼是貪吃蛇的核心代碼,一般貪吃蛇只有4個方向,這個是6個方向也就是3D的。
蛇能自己移動,用函數Snake_Move和Change_Direction實現。
我使用的是STC12C5A60S2,所以要更改的,只有以LED開頭的函數
只要能實現一個點亮指定位置(x,y,z)燈的函數Led_Set_Bit
/******************************************************************************
* 文 件: Snake.c
* 作 者: ZhnJa
* 修改日期: 2013-7-10
* 說 明: 貪吃蛇相關
******************************************************************************/
#include "MyType.h"
#include "LED_CMD.H"
#include "snake.h"
#include "STC12C5A60S2.h"
#include <stdlib.h>
#define WidthMax 4 //蛇最寸高度
#define HeightMax 4 //蛇最大長度
#define LengthMax 4 //蛇最大長度
#define MaxLength 20 //總長度
#define Up 6
#define Down 5
#define Left 4
#define Right 3
#define For 2
#define Rea 1
typedef struct _Food //食物結構體
{
uchar x;/*食物的橫座標*/
uchar y;/*實物的縱座標*/
uchar z;/*實物的z座標*/
uchar yes;/*是否出現食物的標誌,0表示未產生,1表示產生*/
}Food;/*食物*/
typedef struct _Point //點結構體
{
uchar x;
uchar y;
uchar z;
}Point;
typedef struct _Snake
{
uchar x[MaxLength]; //蛇身節點的橫座標
uchar y[MaxLength]; //蛇身節點的縱座標
uchar z[MaxLength]; //蛇節點
uchar node;/*蛇長度*/
uchar direction;/*蛇移動方向*/
uchar life;/*蛇是否存活標誌,0死亡,1存活,2表示暫停*/
}Snake;
xdata Snake snake={{1,2,3},{1,1,1},{1,1,1},3,Up,1};
xdata Food food={1,4,4}; //食物
Point TailPoint;//存放蛇尾巴節點的臨時變量
Point NextPoint;//存放蛇下一次移動的位置
/********************************************
* 蛇初始化
*參數:
*功能:
*********************************************/
void Init_Snake()
{
unsigned char i;
for(i=0;i<=2;i++)
LED_Set_Bit(snake.x[i],snake.y[i],snake.z[i]);
LED_Set_Bit(food.x,food.y,food.z);
}
/********************************************
* 蛇移動函數
*參數:無
*功能:刪除最後一個節點,點亮下一個節點
*********************************************/
uchar Snake_Move()
{
uchar i;
TailPoint.x=snake.x[0]; //保存蛇尾
TailPoint.y=snake.y[0];
TailPoint.z=snake.z[0];
for(i=0;i<snake.node-1;i++) //依次向尾部方向移動蛇各個節點的座標
{
snake.x[i]=snake.x[i+1];
snake.y[i]=snake.y[i+1];
snake.z[i]=snake.z[i+1];
}
switch(snake.direction)
{
case Up:{snake.z[snake.node-1]+=1;break;}
case Down:{snake.z[snake.node-1]-=1;break;}
case Left:{snake.x[snake.node-1]-=1;break;}
case Right:{snake.x[snake.node-1]+=1;break;}
case For:{snake.y[snake.node-1]+=1;break;}
case Rea:{snake.y[snake.node-1]-=1;break;}
}
LED_Reset_Bit(TailPoint.x,TailPoint.y,TailPoint.z);
LED_Set_Bit(snake.x[snake.node-1],snake.y[snake.node-1],snake.z[snake.node-1]);
return 1;
}
bit IsLive()
{
uchar i=0;
//計算下一個點
NextPoint.x=snake.x[snake.node-1];
NextPoint.y=snake.y[snake.node-1];
NextPoint.z=snake.z[snake.node-1];
switch(snake.direction)
{
case Up:{NextPoint.z+=1;break;}
case Down:{NextPoint.z-=1;break;}
case Left:{NextPoint.x-=1;break;}
case Right:{NextPoint.x+=1;break;}
case For:{NextPoint.y+=1;break;}
case Rea:{NextPoint.y-=1;break;}
}
//判斷蛇有沒有撞到自身
for(i=0;i<=snake.node-1;i++)
{
if((snake.x[i]==NextPoint.x)&&(snake.y[i]==NextPoint.y)&&(snake.z[i]==NextPoint.z))
{
snake.life=0;
return 0;
break;
}
}
//判斷蛇有沒有撞到牆
if(NextPoint.x>=1&&NextPoint.x<=4
&&NextPoint.y>=1&&NextPoint.y<=4
&&NextPoint.z>=1&&NextPoint.z<=4)
return 1;
else
{
snake.life=0;
return 0;
}
}
bit Change_Direction()
{
uchar olddir=snake.direction;
if(snake.x[snake.node-1] < food.x)
snake.direction = Right;
else if(snake.x[snake.node-1] > food.x)
snake.direction = Left;
else if(snake.y[snake.node-1] <food.y)
snake.direction = For;
else if(snake.y[snake.node-1] > food.y)
snake.direction = Rea;
else if(snake.z[snake.node-1] > food.z)
snake.direction = Down;
else if(snake.z[snake.node-1] < food.z)
snake.direction = Up;
return 1;
}
//功能:吃食並且產生下一個實物的座標
//返回值:1表示吃到食物,0表示未吃到食物
bit EatFood(void)
{
uchar i;
if(((snake.x[snake.node-1])==food.x)&&((snake.y[snake.node-1])==food.y)&&(snake.z[snake.node-1]==food.z)) //如果吃到食物
{
for(i=snake.node;i>0;i--) //依次向頭部方向移動蛇各個節點的座標
{
snake.x[i]=snake.x[i-1];
snake.y[i]=snake.y[i-1];
snake.z[i]=snake.z[i-1];
}
snake.x[0]=TailPoint.x; //恢復尾巴座標
snake.y[0]=TailPoint.y;
snake.z[0]=TailPoint.z;
snake.node++; //節點個數加1
//以下程序段爲產生食物
do
{
food.yes=1;//實物產生標誌置1
GetNewFoodLoc(&food.x,&food.y,&food.z);//隨機產生新的食物的座標
for(i=0;i<snake.node-1;i++)
{
if((snake.x[i])==food.x&&((snake.y[i])==food.y)&&(snake.z[i]==food.z)) //判斷食物出現的位置是否在蛇身上
{
food.yes=0; //食物產生標誌置0
break;
}
}
}while(!food.yes);//直到產生的食物不在蛇身上爲止
LED_Set_Bit(food.x,food.y,food.z);//產生新的食物
return 1;
}
return 0;
}
//讀取定時器的隨機值來獲得食物座標,同時不能越界
void GetNewFoodLoc(uchar *x,uchar *y,uchar *z)
{
*x=TH0%4+1;
*y=TL0%4+1;
*z=(TL0+TH0)%4+1;
}
void Change_Direction2()
{
uchar olddir=snake.direction;
do{
snake.direction=rand()%6+1;
}
while(snake.direction == olddir);
}
//表示食物的LED燈閃爍
void Shine_Food()
{
LED_Shine(food.x,food.y,food.z);
}
指定位置滅LED燈Led_Reset_Bit 以及 讓LED閃爍的函數LED_Shine 即可。