Created
July 4, 2017 21:23
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Conway's Game of Life
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| <!-- saved from http://www.cc.gatech.edu/grads/b/bhroleno/ --> | |
| <html> | |
| <title>Conway's Game of Life</title> | |
| <head> | |
| <style type="text/css"> | |
| body{ font-family: serif; font-size:1.00em; text-align: center; margin: 10px 0 30px 0; virtical-align: middle } | |
| </style> | |
| <script type="text/javascript"> | |
| var cells = new Array(40); | |
| var tmpCells = new Array(40); | |
| var canvas; | |
| var ctx; | |
| var speed = 100; | |
| var liveProb = 0.1; | |
| function drawCells(){ | |
| updateCells(); | |
| for(var x=0;x<40;x++){ | |
| for(var y=0;y<17;y++){ | |
| if(cells[x][y]) | |
| ctx.fillStyle = "rgb(255,255,255)"; | |
| else | |
| ctx.fillStyle = "rgb(0,0,0)"; | |
| ctx.fillRect((x*20),(y*20),20,20); | |
| } | |
| } | |
| setTimeout('drawCells()',speed); | |
| } | |
| function aliveNeighbors(x,y){ | |
| var neighbors=0; | |
| if(x>0){ | |
| if(y>0 && cells[x-1][y-1]) neighbors++; | |
| if(cells[x-1][y]) neighbors++; | |
| if(y<16 && cells[x-1][y+1]) neighbors++; | |
| } | |
| if(y>0 && cells[x][y-1]) neighbors++; | |
| if(y<16 && cells[x][y+1]) neighbors++; | |
| if(x<39){ | |
| if(y>0 && cells[x+1][y-1]) neighbors++; | |
| if(cells[x+1][y]) neighbors++; | |
| if(y<16 && cells[x+1][y+1]) neighbors++; | |
| } | |
| return neighbors; | |
| } | |
| function updateCells(){ | |
| for(var x=0;x<40;x++){ | |
| for(var y=0;y<17;y++){ | |
| var neighbors = aliveNeighbors(x,y); | |
| if(neighbors < 2 || neighbors > 3) | |
| tmpCells[x][y] = false; | |
| else if(cells[x][y] || neighbors == 3) | |
| tmpCells[x][y] = true; | |
| } | |
| } | |
| var foo = cells; | |
| cells = tmpCells; | |
| tmpCells = foo; | |
| } | |
| function ca(){ | |
| for(var x=0; x<40;x++){ | |
| cells[x] = new Array(17); | |
| tmpCells[x] = new Array(17); | |
| for(var y=0; y<17; y++){ | |
| if(Math.random()<liveProb) | |
| cells[x][y] = true; | |
| else | |
| cells[x][y] = false; | |
| } | |
| } | |
| canvas = document.getElementById('banner'); | |
| ctx = canvas.getContext('2d'); | |
| drawCells(); | |
| } | |
| </script> | |
| </head> | |
| <body onload="ca();"> | |
| <canvas id="banner" width="800" height="340"></canvas> | |
| </body> | |
| </html> |
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