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Title	Phyllotaxis Primes in Motion
ID	1238253313
Created	13 years ago, 1355874918784
Updated	5 years ago, 1578691711242
Code	/* Arranges numbers in Phyllotactic spirals, emphasising the prime numbers. / frameRate(60); var pointScale = 5; //scale of each circle var streaks = 0.95; var angle = 90.0; var speed = -1; var maxPoints = 9000; var friction = 0.2; var zoom = 0.25; var spiralify = 0; // NEW !! var s_width = 501; var s_speed = -0.8; //determines the number of factors var primes = [2,3,5,7,11,13]; var isPrime = function(number) { if (number===1) { return true; } var sqrtNum = sqrt(number); for (var i = 0; primes[i] <= sqrtNum; i++) { if (number === primes[i]) { return true; } else if (number % primes[i] === 0) { return false; } } primes[primes.length] = number; //debug(primes); //text(number, 10, (number % 100) 4); return true; }; var numFactors = function(number) { if (number===1) { return 1; } var factorCount = 0; var sqrtNum = sqrt(number); for (var i = 1; i <= sqrtNum; i++) { if (number % i === 0) { factorCount++; } } if (number/round(sqrtNum)===sqrtNum) { return (2factorCount - 1); } else { return (2factorCount); } }; var newPoint = function(angle, factors, number) { var d = 1 + 0.1sin(numberspiralify); return [sin(numbers_speed)s_width, -cos(numbers_speed)s_width, cos(angle)d, sin(angle)d, factors, number]; }; var pointArray = []; zoom = max(0.1, zoom); var number = 1; background(43, 41, 71); noStroke(); var draw = function() { fill(color(37, 48, 48, (1-streaks)255)); rect(0,0,400,400); for (var i = 0; i < pointArray.length; i++) { var p = pointArray[i]; var r = (p[4] ? 2 : 0.5) pointScale; var x = p[0], y = p[1], dx = p[2], dy = p[3]; var c = p[5]; fill((sin(i0.4213)0.5+0.5)255, 255, (cos(i0.3217)0.2+0.8)255); ellipse(xzoom+200, yzoom+200, rzoom, rzoom); p[0] = x+dxspeed; p[1] = y+dyspeed; p[2] = 1-friction/100; p[3] = 1-friction/100; //if (p[4] & ((c-1)%100===0)) { // text(c, xzoom+200, yzoom+200); //} } angle += 172; number += 1; var value = isPrime(number); pointArray[pointArray.length] = newPoint(angle, value, number); pointArray = pointArray.slice(-maxPoints); //fill((0.5 + 0.5value)color(255, 255, 255)); //text(number, 350, 389); };
Folds
Fork	false
Key	ag5zfmtoYW4tYWNhZGVteXIUCxIKU2NyYXRjaHBhZBiB_rjOBAw
Votes	201
Spin-Offs	89
Type	PJS
Width	400
Height	400
User Flagged	false
Origin Scratchpad	{"id":"1222905291","title":"Challenge - Number pattern visualization","deleted":"false","official":"false"}
Hidden From Hotlist	false
Restricted Posting	false
By Child	false
Author Nick	Ofer Koren
Author Name	koreno
Author ID	kaid_1106305681686449894894215
Author Profile Access	COACH

Archive Data

Added	10 months ago, 1739280397927
Updated	10 months ago, 1739280397927
Source Deleted	unknown