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Snake.cpp
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#include "Snake.h"
#include<stdio.h>
#include<conio.h>
#include<Windows.h>
#include<iostream>
#include<thread>
#define SIZE 40
using namespace std;
Snake::Snake()
{
score = 0;
bonus = 0;
time = 0;
color = 1;
loadimage(&EATEN, _T("Blank.jpg"), SIZE, SIZE);
loadimage(&SPECIAL, _T("SpecialFood.jpg"), SIZE, SIZE);
}
void Snake::initial()
{
//初始化的小蛇,加载图片
if (color == 1) {
loadimage(&SHUP, _T("SnakeHeadUp.jpg"), SIZE, SIZE);
loadimage(&SHDOWN, _T("SnakeHeadDown.jpg"), SIZE, SIZE);
loadimage(&SHLEFT, _T("SnakeHeadLeft.jpg"), SIZE, SIZE);
loadimage(&SHRIGHT, _T("SnakeHeadRight.jpg"), SIZE, SIZE);
loadimage(&RandomFood, _T("RedFood.jpg"), SIZE, SIZE);
loadimage(&SHBODY, _T("RedBodyH.jpg"), SIZE, SIZE);
loadimage(&SVBODY, _T("RedBodyV.jpg"), SIZE, SIZE);
}
if (color == 2) {
loadimage(&SHUP, _T("YellowHeadUp.jpg"), SIZE, SIZE);
loadimage(&SHDOWN, _T("YellowHeadDown.jpg"), SIZE, SIZE);
loadimage(&SHLEFT, _T("YellowHeadLeft.jpg"), SIZE, SIZE);
loadimage(&SHRIGHT, _T("YellowHeadRight.jpg"), SIZE, SIZE);
loadimage(&RandomFood, _T("YellowFood.jpg"), SIZE, SIZE);
loadimage(&SHBODY, _T("YellowBodyH.jpg"), SIZE, SIZE);
loadimage(&SVBODY,_T("YellowBodyV.jpg"), SIZE, SIZE);
}
int i = 2;
int j = 2;
q.push(i, j, 4);
loadHead(i, j, 4);
for (; i < 4; i++) {
putimage(i * SIZE, j * SIZE, &SHBODY);
q.push(i + 1, j,4);
loadHead(i, j, 4);
}
//产生随机食物,判断食物坐标的合法性
f.randomFood();
while (!q.judge(f.loc_x(),f.loc_y())) {
f.randomFood();
}
putimage(f.loc_x() * SIZE, f.loc_y() * SIZE, &RandomFood);
Move(i, j, 1, 0, 4,-1);
//初始移动方向：向右
}
bool Snake::changeDirection(int i,int j,int dir,int limStep)
{
//方向——上：1，下：2，左：3，右：4;
int flag = 1,right,down,cur_dir,step = limStep;
//if (_kbhit()) {
char ch;
ch = _getch();
switch (ch) {
//向左
case 75: {
cur_dir = 3;
//原本是向上或向下走，则符合条件
if (dir == 1 || dir == 2) {
right = -1;
down = 0;
flag = Move(i, j, right, down,cur_dir,step);
if (flag == 0)
return false;
}
break;
}
//向右
case 77: {
cur_dir = 4;
if (dir == 1 || dir == 2) {
right = 1;
down = 0;
//Move(i, j, right, down, cur_dir);
flag = Move(i, j, right, down, cur_dir,step);
if (flag == 0)
return false;
}
break;
}
//向上
case 72: {
cur_dir = 1;
if (dir == 3 || dir == 4) {
right = 0;
down = -1;
//Move(i, j, right, down,cur_dir);
flag = Move(i, j, right, down, cur_dir,step);
if (flag == 0)
return false;
}
break;
}
//向下
case 80: {
cur_dir = 2;
if (dir == 3 || dir == 4) {
right = 0;
down = 1;
//Move(i, j, right, down,cur_dir);
flag = Move(i, j, right, down, cur_dir,step);
if (flag == 0)
return false;
}
break;
}
default:
break;
}
//}
}
void Snake::loadHead(int i, int j, int dir)
{
if (dir == 1) putimage(i * SIZE, j * SIZE, &SHUP);
if (dir == 2) putimage(i * SIZE, j * SIZE, &SHDOWN);
if (dir == 3) putimage(i * SIZE, j * SIZE, &SHLEFT);
if (dir == 4) putimage(i * SIZE, j * SIZE, &SHRIGHT);
//插入蛇头图像(四个方向不相同)
}
bool Snake::Move(int i, int j, int right, int down,int dir,int limStep)
{
int direction = dir;
int x, y, count = 0,flag,tag; //flag:标志是否吃到了食物
char k;
while (1) {
settextcolor(BLACK);
settextstyle(3 * SIZE / 4, 0, _T("微软雅黑"));
char str[20];
sprintf_s(str, "%s%d", " SCORE: ", score + bonus);
outtextxy(10*SIZE,0, str);
flag = 0;
if (_kbhit()) {
if(!changeDirection(i, j, direction,limStep))
return false;
}
if (count != 0)
Sleep(time);
if (dir == 1 || dir == 2)
putimage(i * SIZE, j * SIZE, &SVBODY);
if (dir == 3|| dir == 4)
putimage(i * SIZE, j * SIZE, &SHBODY);
if (f.loc_x() == i + right && f.loc_y() == j + down && !f.special) {
score++;
putimage((i + right) * SIZE, (j + down) * SIZE, &EATEN);
flag = 1;
}
//吃掉食物,食物消失
if (f.loc_x() == i + right && f.loc_y() == j + down && f.special) {
f.special = false;
limStep = -1;
bonus += 4;
score++;
putimage((i + right) * SIZE, (j + down) * SIZE, &EATEN);
flag = 1;
}
//普通移动
if (flag == 0) {
q.pop(x, y, k);
q.push(i + right, j + down,dir);
loadHead(i + right, j + down, dir);
if (limStep > 0)
limStep--;//蛇每移动一步,限定步数少一步
//限时食物消失
}
if (flag == 1) {
q.push(i + right, j + down, dir);
loadHead(i + right, j + down, dir);
f.randomFood();
while (!q.judge(f.loc_x(), f.loc_y())) {
f.randomFood();
}
//吃到了第五个食物,则进入判断语句
// 每吃掉5个普通食物，则食物变为限时食物，在给定的移动步数（比如30个）之后会自动消失,吃掉会加5分;
if (score % 5 == 0) {
f.special = true;
//判断随机坐标是否与蛇的坐标或普通食物的坐标重合
putimage(f.loc_x() * SIZE, f.loc_y() * SIZE, &SPECIAL);
limStep = 20;
}
else {
f.special = false;
putimage(f.loc_x() * SIZE, f.loc_y() * SIZE, &RandomFood);
}
}
if (!q.suicide(i + right, j + down)) {
return false;
}//后续ExitGame();
i += right;
j += down;
if (limStep == 0) {
limStep = -1;
putimage(f.loc_x() * SIZE, f.loc_y() * SIZE, &EATEN);
//限时消失后要产生一个新的食物
f.randomFood();
while (!q.judge(f.loc_x(), f.loc_y())) {
f.randomFood();
}
putimage(f.loc_x() * SIZE, f.loc_y() * SIZE, &RandomFood);
}
count = 1;
}
}
Snake::~Snake()
{
}