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@danja danja/index.html
Last active Nov 30, 2015

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Life on the Ocean Wave
<!DOCTYPE html>
<!--
see also
http://bl.ocks.org/mbostock/raw/c66ab1426f4b8945a7ef/
https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life
-->
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="utf-8">
<style>
canvas {
position: absolute;
}
</style>
</head><body data-pinterest-extension-installed="cr1.39.1"><canvas id="canvas-back" width="960" height="500"></canvas>
<canvas id="canvas-front" width="960" height="500"></canvas>
<script>
/* https://github.com/d3/d3-timer Copyright 2015 Mike Bostock */
!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define("d3-timer",["exports"],e):e(t.d3_timer={})}(this,function(t){"use strict";function e(t,e,n){this.id=++c,this.restart(t,e,n)}function n(t,n,i){return new e(t,n,i)}function i(t){t=null==t?Date.now():+t,++l;try{for(var e,n=a;n;)t>=n.time&&(e=n.callback)(t-n.time,t),n=n.next}finally{--l}}function o(){l=f=0;try{i()}finally{for(var t,e=a,n=1/0;e;)e.callback?(n>e.time&&(n=e.time),e=(t=e).next):e=t?t.next=e.next:a=e.next;u=t,r(n)}}function r(t){if(!l){f&&(f=clearTimeout(f));var e=t-Date.now();e>24?1/0>t&&(f=setTimeout(o,e)):(l=1,s(o))}}var a,u,l=0,f=0,c=0,m={},s="undefined"!=typeof window&&(window.requestAnimationFrame||window.msRequestAnimationFrame||window.mozRequestAnimationFrame||window.webkitRequestAnimationFrame||window.oRequestAnimationFrame)||function(t){return setTimeout(t,17)};e.prototype=n.prototype={restart:function(t,e,n){if("function"!=typeof t)throw new TypeError("callback is not a function");n=(null==n?Date.now():+n)+(null==e?0:+e);var i=this.id,o=m[i];o?(o.callback=t,o.time=n):(o={next:null,callback:t,time:n},u?u.next=o:a=o,m[i]=u=o),r()},stop:function(){var t=this.id,e=m[t];e&&(e.callback=null,e.time=1/0,delete m[t],r())}};var d="0.0.6";t.version=d,t.timer=n,t.timerFlush=i});
var canvasBack = document.getElementById("canvas-back"),
canvasFront = document.getElementById("canvas-front");
var width = canvasBack.width,
height = canvasBack.height,
ringRadius = 6, // 24
ringSeparation = 1.1 * ringRadius,
dotRadius = 2, // 3.5
n = Math.floor((width + ringRadius) / ringSeparation),
m = Math.floor((height + ringRadius) / ringSeparation);
var fieldA = [];
var fieldB = [];
for (var i = 0; i < n; ++i) {
fieldA[i] = [];
fieldB[i] = [];
for (var j = 0; j < m; ++j) {
fieldB[i][j] = 0;
if(Math.random() > 0.5) {
fieldA[i][j] = 1;
} else {
fieldA[i][j] = 0;
}
// console.log(i+" "+j+" "+fieldA[i][j]);
}
}
var contextBack,
contextFront,
scale = window.devicePixelRatio;
if (scale > 1) {
canvasFront.style.width = canvasBack.style.width = width + "px";
canvasFront.style.height = canvasBack.style.height = height + "px";
canvasFront.width = canvasBack.width = width * scale;
canvasFront.height = canvasBack.height = height * scale;
contextBack = canvasBack.getContext("2d");
contextFront = canvasFront.getContext("2d");
contextBack.scale(scale, scale);
contextFront.scale(scale, scale);
} else {
contextBack = canvasBack.getContext("2d");
contextFront = canvasFront.getContext("2d");
}
/*
contextBack.strokeStyle = "#999";
for (var i = -1; i < n; ++i) {
for (var j = -1; j < m; ++j) {
contextBack.beginPath();
contextBack.arc(i * ringSeparation, j * ringSeparation, ringRadius, 0, 2 * Math.PI);
contextBack.stroke();
}
}
*/
function gen(i, j){
// console.log(i + " " + j+" "+n+" "+m);
// console.log("fieldA[1][1] "+fieldA[1][1]);
var xa, xb, ya, yb;
if(i > 0) {
xa = i-1;
} else {
xa = n-1;
}
if(j > 0) {
ya = j-1;
} else {
ya = m-1;
}
if(i == n-1) {
xb = 0;
} else {
xb = i+1;
}
if(j == m-1) {
yb = 0;
} else {
yb = j+1;
}
// console.log("x"+xa + " " + ya+" "+xb + " " + yb);
// console.log("fieldA[xa][ya] "+fieldA[xa][ya]);
var sum = fieldA[xa][ya]
+ fieldA[xa][j]
+ fieldA[xa][yb]
+ fieldA[i][ya]
+ fieldA[i][yb]
+ fieldA[xb][ya]
+ fieldA[xb][j]
+ fieldA[xb][yb] ;
fieldB[i][j] = 0;
if(fieldA[i][j] == 1 && (sum == 2 || sum == 3)){
fieldB[i][j] = 1;
}
if(fieldA[i][j] == 0 && sum == 3){
fieldB[i][j] = 1;
}
}
var count = 0;
d3_timer.timer(function(elapsed) {
contextFront.clearRect(0, 0, width, height);
for (var i = 0; i < n; i++) {
for (var j = 0; j < m; j++) {
contextFront.save();
contextFront.beginPath();
contextFront.translate(i * ringSeparation, j * ringSeparation);
contextFront.rotate((i + j) / 6 + elapsed / 200);
contextFront.arc(ringRadius, 0, dotRadius, 0, 2 * Math.PI);
if(fieldA[i][j] == 1) {
contextFront.fill();
}
contextFront.restore();
}
}
// if((count++ % 10) == 0){
for (var i = 0; i < n; i++) {
for (var j = 0; j < m; j++) {
gen(i, j);
}
}
for (var i = 0; i < n; i++) {
for (var j = 0; j < m; j++) {
fieldA[i][j] = fieldB[i][j];
}
}
// }
});
</script>
<div id="screenleapDiv" style="position:fixed;right:1px;bottom:1px;visibility:hidden;width:1px;height:1px" installed="true" sharing="false"></div></body></html>
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commented Nov 30, 2015

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