easyx图形库基础4：贪吃蛇
贪吃蛇
- 一实现贪吃蛇：
-
- 1.绘制网格：
- 1.绘制蛇：
- 3.控制蛇的默认移动向右：
- 4.控制蛇的移动方向：
- 5.生成食物
- 6.判断蛇吃到食物并且长大。
- 7.判断游戏结束：
- 8.重置函数：
- 二整体代码：
一实现贪吃蛇：
1.绘制网格：
#define wide 800
#define high 600
#define Frame 20
//1.绘制边框
void DrawFrame()
{
setlinecolor(BLACK);
setlinestyle(PS_SOLID, 1);
for (int i = 1; i < wide / Frame; i++)
{
line(Frame * i, 0, Frame * i, 600);
}
for (int i = 1; i < high / Frame; i++)
{
line(0, Frame * i,800 , Frame * i);
}
}
1.绘制蛇：
int main()
{
initgraph(wide,high);
setbkcolor(RGB(188, 227, 245));
cleardevice();
//初始化蛇的长度
int length = 5;
//初始化蛇的坐标：
sn snake[5] = { {7,6} ,{6,6}, {5,6},{4,6},{3,6} };
while (1)
{
cleardevice();
BeginBatchDraw();
//1.绘制边框
DrawFrame();
//2.绘制蛇
DrawSnake(snake,length);
FlushBatchDraw();
Sleep(40);
}
EndBatchDraw();
getchar();
closegraph();
return 0;
}
//2.绘制蛇
void DrawSnake(sn* snake,int length)
{
setfillcolor(GREEN);
for (int i = 0; i < length; i++)
{
//先绘制头
int x1 = snake[i].x;
int y1 = snake[i].y;
solidrectangle(x1 * Frame, y1 * Frame, (x1 + 1) * Frame, (y1 + 1) * Frame);
}
}
3.控制蛇的默认移动向右：
void SnakeMove(sn* snake, int length)
{
//默认蛇一开始是一直向右移动的;
sn newsnake = { (snake->x)+1,(snake->y)};
//2.绘制蛇
DrawSnake(snake, length);
FlushBatchDraw();
//进行蛇的移动;
for (int i = length - 1; i >= 1; i--)
{
snake[i] = snake[i - 1];
}
snake[0] = newsnake;
}
4.控制蛇的移动方向：
void SnakeMove(sn* snake, int length,int* vx,int* vy)
{
//默认蛇一开始是一直向右移动的;
//2.绘制蛇
DrawSnake(snake, length);
FlushBatchDraw();
//进行蛇的移动;
if (_kbhit())
{
char ch = _getch();
//蛇是不可以直接走回头路的：
switch (ch)
{
case'A':
case'a':
if (*vx == 1 && vy == 0)
break;
*vx = -1;
*vy = 0;
break;
case'W':
case'w':
if (*vx == 0 && *vy == 1)
break;
*vx = 0;
*vy = -1;
break;
case'D':
case'd':
if (*vx == -1 && *vy == 0)
break;
*vx = 1;
*vy = 0;
break;
case'S':
case's':
if (*vx == 0 && *vy == -1)
break;
*vx = 0;
*vy = 1;
break;
}
}
//控制蛇节点变化
sn newsnake = { (snake->x)+(*vx) ,(snake->y)+(*vy)};
for (int i = length - 1; i >= 1; i--)
{
snake[i] = snake[i - 1];
}
snake[0] = newsnake;
}
5.生成食物
1.食物不可以生成到画布的外面；
2.不可以生成在蛇的身体上面；
3.食物是随机生成的；
//4.生成食物：
void DrawFeeFood(sn* snake, int length, FD* food)
{
int fx = 0;
int fy = 0;
int flag = 0;
while (1)
{
//食物坐标的随机生成：
food->x = rand() % (wide / Frame);
food->y= rand() % (high / Frame);
//2.不可以生成在蛇的身体上面，遍历蛇的身体。
for (int i = 0; i < length; i++)
{
if (((food->x) == (snake[i].x)) && ((food->y) == (snake[i].y)))
{
flag++;
}
}
if (flag == 0)
{
break;
}
}
}
//3.控制蛇的移动
void SnakeMove(sn* snake, int length,FD* food,int* vx,int* vy)
{
//默认蛇一开始是一直向右移动的;
//2.绘制蛇
DrawSnake(snake, length);
//2.绘制食物：
if (food->x == 0 && food->y == 0)
{
DrawFeeFood(snake, length, food);
}
setfillcolor(YELLOW);
solidrectangle((food->x) * Frame, (food->y) * Frame, (food->x+1) * Frame, (food->y+1) * Frame);
FlushBatchDraw();
//进行蛇的移动;
if (_kbhit())
{
char ch = _getch();
//蛇是不可以直接走回头路的：
switch (ch)
{
case'A':
case'a':
if (*vx == 1 && vy == 0)
break;
*vx = -1;
*vy = 0;
break;
case'W':
case'w':
if (*vx == 0 && *vy == 1)
break;
*vx = 0;
*vy = -1;
break;
case'D':
case'd':
if (*vx == -1 && *vy == 0)
break;
*vx = 1;
*vy = 0;
break;
case'S':
case's':
if (*vx == 0 && *vy == -1)
break;
*vx = 0;
*vy = 1;
break;
}
}
//控制蛇节点变化
sn newsnake = { (snake->x)+(*vx) ,(snake->y)+(*vy)};
for (int i = length - 1; i >= 1; i--)
{
snake[i] = snake[i - 1];
}
snake[0] = newsnake;
}
6.判断蛇吃到食物并且长大。
//3.控制蛇的移动
void SnakeMove(sn* snake, int* length,FD* food,int* vx,int* vy)
{
//默认蛇一开始是一直向右移动的;
//2.绘制蛇
DrawSnake(snake, *length);
//3.绘制食物：
if (food->x == 0 && food->y == 0)
{
DrawFeeFood(snake, length, food);
}
setfillcolor(YELLOW);
solidrectangle((food->x) * Frame, (food->y) * Frame, (food->x+1) * Frame, (food->y+1) * Frame);
FlushBatchDraw();
//进行蛇的移动;
if (_kbhit())
{
char ch = _getch();
//蛇是不可以直接走回头路的：
switch (ch)
{
case'A':
case'a':
if (*vx == 1 && vy == 0)
break;
*vx = -1;
*vy = 0;
break;
case'W':
case'w':
if (*vx == 0 && *vy == 1)
break;
*vx = 0;
*vy = -1;
break;
case'D':
case'd':
if (*vx == -1 && *vy == 0)
break;
*vx = 1;
*vy = 0;
break;
case'S':
case's':
if (*vx == 0 && *vy == -1)
break;
*vx = 0;
*vy = 1;
break;
}
}
//控制蛇节点变化
sn newsnake = { (snake->x)+(*vx) ,(snake->y)+(*vy)};
for (int i = *length - 1; i >= 1; i--)
{
snake[i] = snake[i - 1];
}
snake[0] = newsnake;
//判断蛇是否吃到了食物和生长：
Grow(snake, length, food);
}
void Grow(sn* snake, int* length, FD* food)
{
//保存一下尾的数值
sn end = snake[(*length) - 1];
if ((snake[0].x == food->x) && (snake[0].y == food->y))
{
//重置食物数值
food->x = 0;
food->y = 0;
//添加尾节点；
*length = (*length) + 1;
snake[*length] = end;
}
}
7.判断游戏结束：
1.蛇头碰到墙壁：
2.蛇头碰到蛇身体：
//5.判断游戏结束
bool Gameover(sn* snake, int* length)
{
//1.碰到墙壁
if ((snake[0].x >= wide / Frame) || (snake[0].x < 0) || (snake[0].y >= high / Frame) || (snake[0].y < 0))
{
return true;
}
else
{
//2.碰到身体
for (int i = 1; i < (*length); i++)
{
if (((snake[0].x)==(snake[i].x))&&((snake[0].y) == (snake[i].y)))
return true;
}
}
return false;
}
8.重置函数：
//初始化函数
void initgame(int* length,int* vx,int* vy,sn* snake,FD* food)
{
//初始化蛇的长度
*length = 5;
//初始化蛇的水平初始速度
*vx = 1;
*vy = 0;
//初始化蛇的坐标：
snake[0] = { 7,6 };
snake[0] = { 6,6 };
snake[0] = { 5,6 };
snake[0] = { 4,6 };
snake[0] = { 3,6 };
//初始化食物的坐标；
*food = { 0,0 };
}
二整体代码：
#define _CRT_SECURE_NO_WARNINGS 1
#include