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April 11, 2024 21:47
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game_of_life
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| <!DOCTYPE html> | |
| <html> | |
| The game of life.<br> | |
| <a href="https://www.youtube.com/watch?v=ouipbDkwHWA">youtube</a> | |
| <br> | |
| <input type="button" onclick="timer = false" value="||"/> | |
| <input type="button" onclick="timer = false; count(cnt)" value=">"/> | |
| <input type="button" onclick="timer = true" value=">>"/> | |
| <br> | |
| <canvas id="canvas" width="80px" height="40px" style="border: red solid 2px; transform-origin: top left; transform: scale(8); image-rendering: -moz-crisp-edges;" onclick="toggle()" onmousemove="if(event.buttons == 1) paint()" ontouchmove=" paint()"></iframe> | |
| <script> | |
| Nx = canvas.width | |
| Ny = canvas.height | |
| timer = false | |
| var ctx = canvas.getContext("2d", {alpha: false}); | |
| var imgData = ctx.getImageData(0, 0, Nx, Ny); | |
| var data = imgData.data; | |
| ctx.imageSmoothingEnabled = false | |
| cnt = D = [...Array(Nx)].map(x => [...Array(Ny)].map(x => false)) | |
| D[8][10] = true | |
| D[9][11] = true | |
| D[10][9] = true | |
| D[10][10] = true | |
| D[10][11] = true | |
| function draw(M) { | |
| k = 0 | |
| for (j=0; j<Ny; ++j) | |
| for (i=0; i<Nx; ++i) { | |
| data[k] = data[k+1] = 0xFF * M[i][j] | |
| k += 4 | |
| } | |
| ctx.putImageData(imgData, 0, 0); | |
| } | |
| function count(M) { | |
| cnt = [...Array(Nx)].map(x => [...Array(Ny)].map(x => 0)) | |
| for (i=1; i<Nx-1; ++i) | |
| for (j=1; j<Ny-1; ++j) { | |
| cnt[i][j] = M[i-1][j-1] + M[i][j-1] + M[i+1][j-1] + | |
| M[i-1][j] + M[i+1][j] + | |
| M[i-1][j+1] + M[i][j+1] + M[i+1][j+1] | |
| cnt[i][j] = (M[i][j] && cnt[i][j] == 2) || (cnt[i][j] == 3) | |
| } | |
| draw(cnt) | |
| } | |
| function toggle(){ | |
| i = parseInt((event.clientX-canvas.offsetLeft)/8-2) | |
| j = parseInt((event.clientY-canvas.offsetTop)/8-2) | |
| cnt[i][j] = !cnt[i][j] | |
| draw(cnt) | |
| } | |
| function paint(){ | |
| e = event.touches ? event.touches[0] : event | |
| i = parseInt((e.clientX-canvas.offsetLeft)/8-2) | |
| j = parseInt((e.clientY-canvas.offsetTop)/8-2) | |
| cnt[i][j] = true | |
| draw(cnt) | |
| } | |
| function runtimer() { | |
| setInterval(function() { | |
| if (timer) count(cnt) | |
| }, 100) | |
| } | |
| draw(cnt) | |
| runtimer() | |
| </script> | |
| </html> |
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