Created
April 28, 2017 13:38
-
-
Save szledan/4cb586c8b464cb74749777c29a7b3516 to your computer and use it in GitHub Desktop.
Fractals
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<!DOCTYPE html> | |
<html> | |
<body> | |
<canvas id="myCanvas" width="500" height="500" style="border:1px solid #d3d3d3;"> | |
Your browser does not support the HTML5 canvas tag.</canvas> | |
<script> | |
/* LICENSE: BSD 2 | |
* Copyright 2017 @szledan, @dbatyai | |
*/ | |
function Point(x, y) { | |
return {"x" : x, "y" : y}; | |
} | |
function copyPoint(p) { | |
return {"x" : p.x, "y" : p.y}; | |
} | |
function plotPoint(p) | |
{ | |
ctx.beginPath(); | |
ctx.arc(p.x, p.y, 1, 0, 2 * Math.PI); | |
ctx.fill(); | |
} | |
function movePoint(p, baseP, range) | |
{ | |
p.x += (baseP.x - p.x) / range; | |
p.y += (baseP.y - p.y) / range; | |
return p; | |
} | |
var c = document.getElementById("myCanvas"); | |
var ctx = c.getContext("2d"); | |
var N = 3; | |
var C = 100000; | |
var R = 240; | |
var RANGE = 2.0; | |
var basePoints = []; | |
var scale = 2 * Math.PI / N; | |
for (var i = 0; i < N; ++i) { | |
var alpha = i * scale; | |
basePoints[i] = Point(R * Math.cos(alpha) + 250, R * Math.sin(alpha) + 250); | |
plotPoint(basePoints[i]); | |
} | |
p = copyPoint(basePoints[0]); | |
for (var i = 0; i < C; ++i) { | |
var r = Math.floor(Math.random() * N); | |
p = movePoint(p, basePoints[r], RANGE); | |
plotPoint(p); | |
} | |
</script> | |
</body> | |
</html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment