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Personal Experimentation of a Mandala Creator
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<!-- | |
Mouse Events | |
LEFT CLICK: draws in white | |
RIGHT CLICK: draws in color | |
MIDDLE CLICK: draws in black | |
Touch Event: | |
Drag: draws in white | |
--> | |
<html> | |
<head> | |
<meta charset="UTF-8"> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.4/p5.js"></script> | |
<script language="javascript" type="text/javascript"> | |
var elements = 64; | |
function setup(){ | |
//fullScreen(); | |
createCanvas(960, 500); | |
background(0); | |
translate(width/2, height/2); | |
for(var i = 0; i < elements; i++){ | |
stroke(200, 30); | |
var s = TWO_PI/elements*i; | |
line(cos(s)*2, | |
sin(s)*2, | |
cos(s)*width/2, | |
sin(s)*width/2); | |
} | |
} | |
function draw(){ | |
translate(width/2, height/2); | |
var x = touchX-width/2, y = touchY-height/2; | |
if(mouseIsPressed || touchIsDown) | |
{ | |
var c; | |
var b; | |
var v = createVector(x, y); | |
var mag = v.mag(); | |
var degree = acos(v.normalize().dot(createVector(1,0))); | |
if(y>0) | |
degree = TWO_PI-degree; | |
var offset = degree % (TWO_PI/elements); | |
if(mouseButton == LEFT || touchIsDown) { | |
b = 1+map(mag, 0, width/2, 0, 2); | |
c = color(200, 100); | |
} | |
else if (mouseButton == RIGHT){ | |
b = 1+map(mag, 0, width/2, 0, 2); | |
c = color(random(255),random(255),random(255), 100); | |
} | |
else { | |
b = 3+map(mag, 0, width/2, 0, 7); | |
c = color(0); | |
} | |
for(var i = 0; i < elements; i++){ | |
fill(c); | |
noStroke(); | |
var s; | |
if(i%2==0) | |
s = TWO_PI/elements*(i+1)-offset; | |
else | |
s = TWO_PI/elements*i+offset; | |
ellipse(cos(s)*mag, sin(s)*mag, b, b); | |
} | |
} | |
} | |
</script> | |
<!-- this line removes any default padding and style. you might only need one of these values set. --> | |
<style> | |
body { | |
padding: 0; | |
margin: 0; | |
} | |
</style> | |
</head> | |
<body> | |
</body> | |
</html> |
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