Question

What is the algorithm for storing the pixels in a spiral in JS?

Answer 1

http://www.mathematische-basteleien.de/spiral.htm

var Spiral = function(a) {     this.initialize(a); }  Spiral.prototype = {     _a: 0.5,      constructor: Spiral,      initialize: function( a ) {        if (a != null) this._a = a;     },       /* specify the increment in radians */     points: function( rotations, increment ) {        var maxAngle = Math.PI * 2 * rotations;        var points = new Array();         for (var angle = 0; angle <= maxAngle; angle = angle + increment)        {           points.push( this._point( angle ) );        }         return points;     },      _point: function( t ) {         var x = this._a * t * Math.cos(t);         var y = this._a * t * Math.sin(t);         return { X: x, Y: y };     } }   var spiral = new Spiral(0.3); var points = spiral.points( 2, 0.01 );  plot(points); 

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Sample implementation at http://myweb.uiowa.edu/timv/spiral.htm