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// 头文件#include <easyx.h>#include <time.h>#include <math.h>#include <stdio.h>
// 定义常量#define PI 3.141592653589 // 圆周率#define UNIT_GROUND 0 // 表示地面#define UNIT_WALL 1 // 表示墙#define LIGHT_A PI / 3 // 灯光的角度范围#define LIGHT_R 120 // 灯光的照射距离#define WIDTH 480 // 矿井的宽度#define HEIGHT 480 // 矿井的高度#define SCREENWIDTH 640 // 屏幕宽度#define SCREENHEIGHT 480 // 屏幕高度#define UNIT 20 // 每个墙壁单位的大小#define PLAYER_R 5 // 游戏者的半径
// 定义常量const SIZE g_utMap = { 23, 23 }; // 矿井地图的尺寸(基于 UNIT 单位)const POINT g_utPlayer = { 1, 1 }; // 游戏者的位置(基于 UNIT 单位)const POINT g_utExit = { 21, 22 }; // 出口位置(基于 UNIT 单位)const POINT g_ptOffset = { 10, 10 }; // 矿井显示在屏幕上的偏移量
// 定义全局变量POINT g_ptPlayer; // 游戏者的位置POINT g_ptMouse; // 鼠标位置IMAGE g_imgMap(WIDTH, HEIGHT); // 矿井平面图DWORD* g_bufMap; // 矿井平面图的显存指针IMAGE g_imgRender(WIDTH, HEIGHT); // 渲染DWORD* g_bufRender; // 渲染的显存指针DWORD* g_bufScreen; // 屏幕的显存指针
// 枚举用户的控制命令enum CMD { CMD_QUIT = 1, CMD_UP = 2, CMD_DOWN = 4, CMD_LEFT = 8, CMD_RIGHT = 16, CMD_RESTART = 32 };
// 函数声明
// 初始化void Welcome(); // 绘制游戏界面void ReadyGo(); // 准备开始游戏void InitGame(); // 初始化游戏数据
// 矿井生成void MakeMaze(int width, int height); // 初始化(注：宽高必须是奇数)void TravelMaze(int x, int y, BYTE** aryMap); // 遍历 (x, y) 四周void DrawWall(int x, int y, bool left, bool top, bool right, bool bottom); // 画一面墙
// 绘制void Paint(); // 绘制视野范围内的矿井void Lighting(int _x, int _y, double _a); // 在指定位置和角度“照明”void DrawPlayer(); // 绘制游戏者void DrawExit(); // 绘制出口
// 处理用户控制int GetCmd(); // 获取用户输入的命令void OnUp(); // 向上移动void OnLeft(); // 向左移动void OnRight(); // 向右移动void OnDown(); // 向下移动bool CheckWin(); // 检查是否到出口
// 函数定义
// 主程序void main(){ // 初始化 initgraph(SCREENWIDTH, SCREENHEIGHT); // 创建绘图窗口 srand((unsigned)time(NULL)); // 设置随机种子
 // 显示主界面 Welcome();
 // 游戏过程 int c; do { ReadyGo();
 while (true) { // 获得用户输入 c = GetCmd();
 // 处理用户输入 if (c & CMD_UP) OnUp(); if (c & CMD_DOWN) OnDown(); if (c & CMD_LEFT) OnLeft(); if (c & CMD_RIGHT) OnRight(); if (c & CMD_RESTART) { if (MessageBox(GetHWnd(), _T("您要重来一局吗？"), _T("询问"), MB_OKCANCEL | MB_ICONQUESTION) == IDOK) break; } if (c & CMD_QUIT) { if (MessageBox(GetHWnd(), _T("您确定要退出游戏吗？"), _T("询问"), MB_OKCANCEL | MB_ICONQUESTION) == IDOK) break; }
 // 绘制场景 Paint();
 // 判断是否走出矿井 if (CheckWin()) { // 是否再来一局 HWND hwnd = GetHWnd(); if (MessageBox(hwnd, _T("恭喜你走出来了！\n您想再来一局吗？"), _T("恭喜"), MB_YESNO | MB_ICONQUESTION) != IDYES) c = CMD_QUIT;
 break; }
 // 延时 Sleep(16); }
 } while (!(c & CMD_QUIT));
 // 关闭图形模式 closegraph();}
// 准备开始游戏void ReadyGo(){ // 初始化 InitGame();
 // 停电前兆 int time[7] = { 1000, 50, 500, 50, 50, 50, 50 }; int i, x, y; for (i = 0; i < 7; i++) { if (i % 2 == 0) { putimage(0, 0, &g_imgMap); DrawPlayer(); DrawExit(); } else clearrectangle(0, 0, WIDTH - 1, HEIGHT - 1); Sleep(time[i]); } // 电力缓慢中断 for (i = 255; i >= 0; i -= 5) { for (y = (HEIGHT - 1) * SCREENWIDTH; y >= 0; y -= SCREENWIDTH) for (x = 0; x < WIDTH; x++) if (g_bufScreen[y + x] != 0) g_bufScreen[y + x] = g_bufScreen[y + x] - 0x050505;
 FlushBatchDraw(); DrawPlayer(); DrawExit(); Sleep(50); } // 绘制游戏区 Paint();}
// 绘制游戏界面void Welcome(){ setfillcolor(DARKGRAY); solidrectangle(WIDTH, 0, SCREENWIDTH - 1, SCREENHEIGHT - 1);
 // 设置字体样式 settextcolor(WHITE); setbkmode(TRANSPARENT);
 // 绘制标题 settextstyle(24, 0, _T("宋体")); outtextxy(512, 40, _T("矿井逃生"));
 // 绘制操作说明 RECT r = { 488, 100, 632, 470 }; settextstyle(12, 0, _T("宋体")); drawtext(_T("[游戏说明]\n　　矿井里的电路又出问题了。迅速借助你的头灯，在漆黑的矿井里\ 找到出口逃出去吧。\n\n[控制说明]\n方向键：移动\nA/S/D/W：移动\n鼠标：　 控制照射\ 方向\nF2：　　 重来一局\nESC：　　退出游戏"), &r, DT_WORDBREAK); outtextxy(495, 465, _T("bilibili:enter回车键"));}
// 初始化游戏数据void InitGame(){ // 获得窗口显存指针 g_bufRender = GetImageBuffer(&g_imgRender); g_bufMap = GetImageBuffer(&g_imgMap); g_bufScreen = GetImageBuffer(NULL);
 // 设置 Render 环境 SetWorkingImage(&g_imgRender); setbkmode(TRANSPARENT); SetWorkingImage(NULL);
 // 创建矿井 MakeMaze(g_utMap.cx, g_utMap.cy);
 // 设置游戏者位置 g_ptPlayer.x = g_utPlayer.x * UNIT + UNIT / 2 + g_ptOffset.x; g_ptPlayer.y = g_utPlayer.y * UNIT + UNIT / 2 + g_ptOffset.y;}
// 生成矿井：初始化(注：宽高必须是奇数)void MakeMaze(int width, int height){ if (width % 2 != 1 || height % 2 != 1) return;
 int x, y;
 // 定义矿井二维数组，并初始化全部为墙壁 // 宽高比实际多 2，是因为两端各有一个“哨兵”，用于方便处理数据 BYTE** aryMap = new BYTE * [width + 2]; for (x = 0; x < width + 2; x++) { aryMap[x] = new BYTE[height + 2]; memset(aryMap[x], UNIT_WALL, height + 2); }
 // 定义边界(哨兵功能) for (x = 0; x <= width + 1; x++) aryMap[x][0] = aryMap[x][height + 1] = UNIT_GROUND; for (y = 1; y <= height; y++) aryMap[0][y] = aryMap[width + 1][y] = UNIT_GROUND;
 // 从任意点开始遍历生成矿井 TravelMaze(((rand() % (width - 1)) & 0xfffe) + 2, ((rand() % (height - 1)) & 0xfffe) + 2, aryMap);
 // 设置出口 aryMap[g_utExit.x + 1][g_utExit.y + 1] = UNIT_GROUND;
 // 将矿井绘制在 IMAGE 对象上 SetWorkingImage(&g_imgMap); cleardevice(); for (y = 1; y <= height; y++) for (x = 1; x <= width; x++) if (aryMap[x][y] == UNIT_WALL) DrawWall(x, y, aryMap[x - 1][y] == UNIT_WALL, aryMap[x][y - 1] == UNIT_WALL, aryMap[x + 1][y] == UNIT_WALL, aryMap[x][y + 1] == UNIT_WALL); SetWorkingImage(NULL);}
// 生成矿井：遍历 (x, y) 四周void TravelMaze(int x, int y, BYTE** aryMap){ // 定义遍历方向 int d[4][2] = { 0, 1, 1, 0, 0, -1, -1, 0 };
 // 将遍历方向乱序 int n, t, i; for (i = 0; i < 4; i++) { n = rand() % 4; t = d[i][0], d[i][0] = d[n][0], d[n][0] = t; t = d[i][1], d[i][1] = d[n][1], d[n][1] = t; }
 // 尝试周围四个方向 aryMap[x][y] = UNIT_GROUND; for (i = 0; i < 4; i++) if (aryMap[x + 2 * d[i][0]][y + 2 * d[i][1]] == UNIT_WALL) { aryMap[x + d[i][0]][y + d[i][1]] = UNIT_GROUND; TravelMaze(x + d[i][0] * 2, y + d[i][1] * 2, aryMap); // 递归 }}

// 生成矿井：画一面墙// 参数：left/top/right/bottom 表示墙壁是否与旁边连接void DrawWall(int x, int y, bool left, bool top, bool right, bool bottom){ // 墙壁厚 4 pixel int cx, cy; cx = x * UNIT - UNIT / 2 - 2 + 10; cy = y * UNIT - UNIT / 2 - 2 + 10; if (left) solidrectangle(x * UNIT - UNIT + 10, cy, cx + 4, cy + 4); if (top) solidrectangle(cx, y * UNIT - UNIT + 10, cx + 4, cy + 4); if (right) solidrectangle(cx, cy, x * UNIT + 9, cy + 4); if (bottom) solidrectangle(cx, cy, cx + 4, y * UNIT + 9);}
// 绘制视野范围内的矿井void Paint(){ // 设置绘图目标为 Render 对象 SetWorkingImage(&g_imgRender);
 // 清空 Render 对象 cleardevice();
 // 计算视野角度 double dx, dy, a; dx = g_ptMouse.x - g_ptPlayer.x; dy = g_ptMouse.y - g_ptPlayer.y; if (dx == 0 && dy == 0) a = 0; else if (dx != 0 && dy != 0) a = atan(dy / dx); else if (dx == 0) a = (dy > 0) ? PI / 2 : PI * 3 / 2; else a = 0; if (dx < 0) a += PI; if (a < 0) a += PI * 2;
 // 绘制灯光 Lighting(g_ptPlayer.x, g_ptPlayer.y, a);
 // 画游戏者 DrawPlayer();
 // 画出口 DrawExit();
 // 设置绘图目标为窗口 SetWorkingImage(NULL);
 // 显示到窗口上 putimage(0, 0, &g_imgRender);}
// 在指定位置和角度“照明”void Lighting(int _x, int _y, double _a){ int i; // 定义循环变量 int x, y; // 定义临时坐标 double a; // 定义临时角度
 // 计算灯光照亮的角度区域 double a1 = _a - LIGHT_A / 2; double a2 = _a + LIGHT_A / 2; for (a = a1; a < a2; a += PI / 360) // 扇形循环 { for (int r = 0; r < LIGHT_R; r++) // 半径循环 { // 计算照射到的位置 x = (int)(_x + cos(a) * r); y = (int)(_y + sin(a) * r);
 // 光线超出屏幕范围，终止 // (为了简化全凭模糊运算，不处理最上和最下一行) if (x < 0 || x >= WIDTH || y <= 0 || y >= HEIGHT - 1) break;
 // 光线碰到建筑物，终止 if (g_bufMap[y * WIDTH + x]) break;
 // 光线叠加 g_bufRender[y * WIDTH + x] += 0x202000; // 0x202000 是很淡的黄色 } }
 // 计算光照扇形区域的最小包围矩形 // 方法：获得 7 个点的最值：圆心、圆弧两端、圆与 xy 轴的 4 个交点 // 第一步：初始化 7 个点 POINT pt[7]; pt[0].x = _x; pt[0].y = _y; pt[1].x = int(_x + LIGHT_R * cos(a1) + 0.5); pt[1].y = int(_y + LIGHT_R * sin(a1) + 0.5); pt[2].x = int(_x + LIGHT_R * cos(a2) + 0.5); pt[2].y = int(_y + LIGHT_R * sin(a2) + 0.5);
 for (a = ceil(a1 * 4 / (2 * PI)) * (PI / 2), i = 3; a < a2; a += PI / 2, i++) { pt[i].x = int(_x + LIGHT_R * cos(a) + 0.5); pt[i].y = int(_y + LIGHT_R * sin(a) + 0.5); }
 // 第二步：获取 7 个点的最大最小值，得到最小包围矩形 i--; RECT r = { pt[i].x, pt[i].y, pt[i].x, pt[i].y };
 for (--i; i >= 0; i--) { if (pt[i].x < r.left) r.left = pt[i].x; if (pt[i].x > r.right) r.right = pt[i].x; if (pt[i].y < r.top) r.top = pt[i].y; if (pt[i].y > r.bottom) r.bottom = pt[i].y; }
 // 调整矩形范围 if (r.left < 0) r.left = 0; if (r.top < 1) r.top = 1; if (r.right >= WIDTH) r.right = WIDTH - 1; if (r.bottom >= HEIGHT - 1) r.bottom = HEIGHT - 2;
 // 修正曝光过度的点 for (y = r.top; y <= r.bottom; y++) for (x = r.left; x <= r.right; x++) { i = y * WIDTH + x; if (g_bufRender[i] > 0xffff00) g_bufRender[i] = 0xffff00; }
 // 将光线模糊处理(避开建筑物) for (y = r.top; y <= r.bottom; y++) for (x = r.left; x <= r.right; x++) { i = y * WIDTH + x; if (!g_bufMap[i]) g_bufRender[i] = RGB( (GetRValue(g_bufRender[i - WIDTH]) + GetRValue(g_bufRender[i - 1]) + GetRValue(g_bufRender[i]) + GetRValue(g_bufRender[i + 1]) + GetRValue(g_bufRender[i + WIDTH])) / 5, (GetGValue(g_bufRender[i - WIDTH]) + GetGValue(g_bufRender[i - 1]) + GetGValue(g_bufRender[i]) + GetGValue(g_bufRender[i + 1]) + GetGValue(g_bufRender[i + WIDTH])) / 5, (GetBValue(g_bufRender[i - WIDTH]) + GetBValue(g_bufRender[i - 1]) + GetBValue(g_bufRender[i]) + GetBValue(g_bufRender[i + 1]) + GetBValue(g_bufRender[i + WIDTH])) / 5); }}
// 绘制游戏者void DrawPlayer(){ // 画安全帽 setlinecolor(DARKGRAY); circle(g_ptPlayer.x, g_ptPlayer.y, 5);}
// 绘制出口void DrawExit(){ settextstyle(12, 0, _T("宋体")); outtextxy(g_utExit.x * UNIT + g_ptOffset.x, g_utExit.y * UNIT + g_ptOffset.y + 8, _T("出口"));}
// 获取用户输入的命令int GetCmd(){ int c = 0;
 if ((GetAsyncKeyState(VK_LEFT) & 0x8000) || (GetAsyncKeyState('A') & 0x8000)) c |= CMD_LEFT; if ((GetAsyncKeyState(VK_RIGHT) & 0x8000) || (GetAsyncKeyState('D') & 0x8000)) c |= CMD_RIGHT; if ((GetAsyncKeyState(VK_UP) & 0x8000) || (GetAsyncKeyState('W') & 0x8000)) c |= CMD_UP; if ((GetAsyncKeyState(VK_DOWN) & 0x8000) || (GetAsyncKeyState('S') & 0x8000)) c |= CMD_DOWN; if (GetAsyncKeyState(VK_F2) & 0x8000) c |= CMD_RESTART; if (GetAsyncKeyState(VK_ESCAPE) & 0x8000) c |= CMD_QUIT;
 MOUSEMSG m; while (MouseHit()) { m = GetMouseMsg(); g_ptMouse.x = m.x; g_ptMouse.y = m.y; }
 return c;}
// 向上移动void OnUp(){ int i = (g_ptPlayer.y - 6) * WIDTH + (g_ptPlayer.x - 5) + 1; int j; for (j = 0; j < 5; j++, i += 2) if (g_bufMap[i]) break;
 if (j == 5) g_ptPlayer.y--;}
// 向左移动void OnLeft(){ int i = (g_ptPlayer.y - 5) * WIDTH + (g_ptPlayer.x - 5); int j; for (j = 0; j < 5; j++, i += WIDTH) if (g_bufMap[i]) break;
 if (j == 5) g_ptPlayer.x--;}
// 向右移动void OnRight(){ int i = (g_ptPlayer.y - 5) * WIDTH + (g_ptPlayer.x + 5) + 1; int j; for (j = 0; j < 5; j++, i += WIDTH) if (g_bufMap[i]) break;
 if (j == 5) g_ptPlayer.x++;}
// 向下移动void OnDown(){ int i = (g_ptPlayer.y + 5) * WIDTH + (g_ptPlayer.x - 5) + 1; int j; for (j = 0; j < 5; j++, i += 2) if (g_bufMap[i]) break;
 if (j == 5) g_ptPlayer.y++;}// 检查是否到出口bool CheckWin(){ return (g_ptPlayer.y >= g_utExit.y * UNIT + UNIT / 2 + g_ptOffset.y);}