Added Snake Game
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OneLoneCoder
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OneLoneCoder_Snake.cpp
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180
OneLoneCoder_Snake.cpp
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/*
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OneLoneCoder.com - Command Line Snake
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"Give me a break, I'm on holiday..." - @Javidx9
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Disclaimer
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~~~~~~~~~~
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I don't care what you use this for. It's intended to be educational, and perhaps
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to the oddly minded - a little bit of fun. Please hack this, change it and use it
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in any way you see fit. BUT, you acknowledge that I am not responsible for anything
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bad that happens as a result of your actions. However, if good stuff happens, I
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would appreciate a shout out, or at least give the blog some publicity for me.
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Cheers!
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Background
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~~~~~~~~~~
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Classic Snake! Controls are Arrow keys Left & Right, eat food, grow larger, avoid self!
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Author
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~~~~~~
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Twitter: @javidx9
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Blog: www.onelonecoder.com
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Video:
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~~~~~~
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https://youtu.be/e8lYLYlrGLg
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Last Updated: 24/06/2017
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*/
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#include <iostream>
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#include <list>
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#include <thread>
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using namespace std;
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#include <Windows.h>
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int nScreenWidth = 120;
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int nScreenHeight = 30;
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struct sSnakeSegment
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{
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int x;
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int y;
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};
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int main()
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{
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// Create Screen Buffer
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wchar_t *screen = new wchar_t[nScreenWidth*nScreenHeight];
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for (int i = 0; i < nScreenWidth*nScreenHeight; i++) screen[i] = L' ';
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HANDLE hConsole = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE, 0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
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SetConsoleActiveScreenBuffer(hConsole);
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DWORD dwBytesWritten = 0;
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while(1)
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{
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// Reset to known state
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list<sSnakeSegment> snake = { {60,15},{61,15},{62,15},{63,15},{64,15},{65,15},{66,15},{67,15},{68,15},{69,15} };
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int nFoodX = 30;
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int nFoodY = 15;
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int nScore = 0;
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int nSnakeDirection = 3;
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bool bDead = false;
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bool bKeyLeft = false, bKeyRight = false, bKeyLeftOld = false, bKeyRightOld = false;
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while (!bDead)
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{
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// Frame Timing, compensate for aspect ratio of command line
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auto t1 = chrono::system_clock::now();
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while ((chrono::system_clock::now() - t1) < ((nSnakeDirection % 2 == 1) ? 120ms : 200ms))
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{
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// Get Input,
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bKeyRight = (0x8000 & GetAsyncKeyState((unsigned char)('\x27'))) != 0;
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bKeyLeft = (0x8000 & GetAsyncKeyState((unsigned char)('\x25'))) != 0;
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if (bKeyRight && !bKeyRightOld)
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{
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nSnakeDirection++;
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if (nSnakeDirection == 4) nSnakeDirection = 0;
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}
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if (bKeyLeft && !bKeyLeftOld)
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{
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nSnakeDirection--;
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if (nSnakeDirection == -1) nSnakeDirection = 3;
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}
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bKeyRightOld = bKeyRight;
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bKeyLeftOld = bKeyLeft;
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}
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// ==== Logic
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// Update Snake Position, place a new head at the front of the list in
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// the right direction
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switch (nSnakeDirection)
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{
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case 0: // UP
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snake.push_front({ snake.front().x, snake.front().y - 1 });
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break;
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case 1: // RIGHT
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snake.push_front({ snake.front().x + 1, snake.front().y });
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break;
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case 2: // DOWN
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snake.push_front({ snake.front().x, snake.front().y + 1 });
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break;
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case 3: // LEFT
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snake.push_front({ snake.front().x - 1, snake.front().y });
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break;
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}
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// Collision Detect Snake V Food
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if (snake.front().x == nFoodX && snake.front().y == nFoodY)
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{
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nScore++;
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while (screen[nFoodY * nScreenWidth + nFoodX] != L' ')
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{
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nFoodX = rand() % nScreenWidth;
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nFoodY = (rand() % (nScreenHeight-3))+3;
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}
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for (int i = 0; i < 5; i++)
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snake.push_back({ snake.back().x, snake.back().y });
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}
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// Collision Detect Snake V World
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if (snake.front().x < 0 || snake.front().x >= nScreenWidth)
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bDead = true;
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if (snake.front().y < 3 || snake.front().y >= nScreenHeight)
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bDead = true;
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// Collision Detect Snake V Snake
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for (list<sSnakeSegment>::iterator i = snake.begin(); i != snake.end(); i++)
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if (i != snake.begin() && i->x == snake.front().x && i->y == snake.front().y)
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bDead = true;
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// Chop off Snakes tail :-/
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snake.pop_back();
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// ==== Presentation
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// Clear Screen
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for (int i = 0; i < nScreenWidth*nScreenHeight; i++) screen[i] = L' ';
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// Draw Stats & Border
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for (int i = 0; i < nScreenWidth; i++)
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{
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screen[i] = L'=';
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screen[2 * nScreenWidth + i] = L'=';
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}
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wsprintf(&screen[nScreenWidth + 5], L"www.OneLoneCoder.com - S N A K E ! ! SCORE: %d", nScore);
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// Draw Snake Body
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for (auto s : snake)
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screen[s.y * nScreenWidth + s.x] = bDead ? L'+' : L'O';
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// Draw Snake Head
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screen[snake.front().y * nScreenWidth + snake.front().x] = bDead ? L'X' : L'@';
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// Draw Food
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screen[nFoodY * nScreenWidth + nFoodX] = L'%';
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if (bDead)
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wsprintf(&screen[15 * nScreenWidth + 40], L" PRESS 'SPACE' TO PLAY AGAIN ");
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// Display Frame
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WriteConsoleOutputCharacter(hConsole, screen, nScreenWidth * nScreenHeight, { 0,0 }, &dwBytesWritten);
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}
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// Wait for space
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while ((0x8000 & GetAsyncKeyState((unsigned char)('\x20'))) == 0);
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}
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return 0;
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}
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