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thecycle.company

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Snake

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HTML

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Total Size: 3.29 KB

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Created: 7 months ago

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Edited: 7 months ago

<!DOCTYPE html> <html> <head> <title></title> <style> html, body { height: 100%; margin: 0; } body { background: black; display: flex; align-items: center; justify-content: center; } canvas { border: 1px solid white; } </style> </head> <body> <canvas width="400" height="400" id="game"></canvas> <script> var canvas = document.getElementById('game'); var context = canvas.getContext('2d'); var grid = 16; var snake = { x: 160, y: 160, dx: grid, dy: 0, cells: [], maxCells: 4 }; var count = 0; var apple = { x: 320, y: 320 }; function getRandomInt(min, max) { return Math.floor(Math.random() * (max - min)) + min; } // game loop function loop() { requestAnimationFrame(loop); // slow game loop to 15 fps instead of 60 - 60/15 = 4 if (++count < 4) { return; } count = 0; context.clearRect(0,0,canvas.width,canvas.height); snake.x += snake.dx; snake.y += snake.dy; // wrap snake position on edge of screen if (snake.x < 0) { snake.x = canvas.width - grid; } else if (snake.x >= canvas.width) { snake.x = 0; } if (snake.y < 0) { snake.y = canvas.height - grid; } else if (snake.y >= canvas.height) { snake.y = 0; } // keep track of where snake has been. front of the array is always the head snake.cells.unshift({x: snake.x, y: snake.y}); // remove cells as we move away from them if (snake.cells.length > snake.maxCells) { snake.cells.pop(); } // draw apple context.fillStyle = 'red'; context.fillRect(apple.x, apple.y, grid-1, grid-1); // draw snake context.fillStyle = 'green'; snake.cells.forEach(function(cell, index) { context.fillRect(cell.x, cell.y, grid-1, grid-1); // snake ate apple if (cell.x === apple.x && cell.y === apple.y) { snake.maxCells++; apple.x = getRandomInt(0, 25) * grid; apple.y = getRandomInt(0, 25) * grid; } // check collision with all cells after this one (modified bubble sort) for (var i = index + 1; i < snake.cells.length; i++) { // collision. reset game if (cell.x === snake.cells[i].x && cell.y === snake.cells[i].y) { snake.x = 160; snake.y = 160; snake.cells = []; snake.maxCells = 4; snake.dx = grid; snake.dy = 0; apple.x = getRandomInt(0, 25) * grid; apple.y = getRandomInt(0, 25) * grid; } } }); } document.addEventListener('keydown', function(e) { // prevent snake from backtracking on itself if (e.which === 37 && snake.dx === 0) { snake.dx = -grid; snake.dy = 0; } else if (e.which === 38 && snake.dy === 0) { snake.dy = -grid; snake.dx = 0; } else if (e.which === 39 && snake.dx === 0) { snake.dx = grid; snake.dy = 0; } else if (e.which === 40 && snake.dy === 0) { snake.dy = grid; snake.dx = 0; } }); requestAnimationFrame(loop); </script> </body> </html> Run the above HMTL code in a browser... Written by stalker on Github \\ _    \( •_•) F     < ⌒ヽ A    /   へ\ B    /  / \\ U    | ノ   ヽ_つ L   / / O   / /| U  ( (ヽ S  | |、\  | 丿 \ ⌒)  | |  ) / `ノ )  Lノ thecycle.company x

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