贪吃蛇源程序

作者: 来源:网络文章时间:2005-12-17 22:39:42

贪吃蛇源程序(20)     traceon->posy = traceon->pre->posy + SCALE;
    break;
   case MOVE_LEFT:
    traceon->posx = traceon->pre->posx + SCALE;
    traceon->posy = traceon->pre->posy;
    break;
   case MOVE_DOWN:
    traceon->posx = traceon->pre->posx;
    traceon->posy = traceon->pre->posy - SCALE;
    break;
   case MOVE_RIGHT:
    traceon->posx = traceon->pre->posx - SCALE;
    traceon->posy = traceon->pre->posy;
    break;
   default:
    break;
  }

  traceon->next_move = traceon->pre->next_move;
  traceon->pre_move = traceon->pre->next_move;
  traceon->beEaten = 1;
}

}

/* sub function: sort_all()

*/
/* function:this function will calculate the next position of snake */
/* and it is assume the snake has move to next position,but*/
/* haven't appeared yet.

*/
void sort_all()
{
/* sort all food,include snake head,and virtual place */

FOOD_INFOR_PTR traceon;
void *buf;
int size;

size = imagesize(snake_head.posx - SCALE / 2,snake_head.posy - SCALE / 2,
snake_head.posx + SCALE / 2,snake_head.posy + SCALE /

2);
buf = malloc(size);
getimage(snake_head.posx - SCALE / 2,snake_head.posy - SCALE / 2,
snake_head.posx + SCALE / 2,snake_head.posy + SCALE / 2,buf);
putimage(snake_head.posx - SCALE / 2,snake_head.posy - SCALE / 2,

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