Dweets awesomed by u/Ath0r

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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    u(t) is called 60 times per second.
    t: Elapsed time in seconds.
    S: Shorthand for Math.sin.
    C: Shorthand for Math.cos.
    T: Shorthand for Math.tan.
    R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5)
    c: A 1920x1080 canvas.
    x: A 2D context for that canvas.

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Current theme challenge: #Food

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Ath0r

function u(t) {

c.width|=0
for(i=w=1920;i--;)x.fillRect(i,540+300*S(i*0.0065),2,2)
a=t*9
b=w/a
for(i=0;i<a;i++)x.fillRect(i*b,540,b,300*S((i+0.5)*b*0.0065))

Mar 11 2019 5:31 PM UTC

}// 140/140

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Sine integration #sine #integration #maths

u/Jezza

∫sin(x) from 0 to 2π = 0 :) :) :)

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katkip

function u(t) {

eval(unescape(escape`砮杬潢慬䅬灨愽⸱㭸⹦楬汒散琨〬〬㉥㌬㉥㌩㭲㵍慴栮牡湤潭㭦㵰㴾匨⵰⼴㈫琪㈩㱓⡴⤻景爨椽㠹㤻椭ⴻ⥻堽爨⤪ㄹ㄰ⱙ㵲⠩⨱〷〻楦⡦⡙⼴幘⼴⤩砮捬敡牒散琨堬夬㄰ⰱ〩紻`.replace(/u(..)/g,"$1%")))

Mar 9 2019 8:58 AM UTC

}// 125/140

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Electricity. Sadly, #compressed x.globalAlpha=.1;x.fillRect(0,0,2e3,2e3);r=Math.random;f=p=>S(-p/42+t*2)<S(t);for(i=899;i--;){X=r()*1910,Y=r()*1070;if(f(Y/4^X/4))x.clearRect(X,Y,10,10)};

u/magna

Lovely aesthetic
u/corporateanon

Sometimes i see something like this before i fall asleep
u/mcdxn

or after sneezing!

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LimeLaser

function u(t) {

r=Math.random
p=t?p.map(([u,v,i,j]=[100*r()+910,100*r()+490,0,0])=>[u+i/4,v+j/4,i+2*r()-1,j+2*r()-1,x.fillRect(u,v,1,1)]):[...Array(9999)]

Mar 9 2019 7:37 AM UTC

}// 138/140

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Pupil Dilation (or Pandora's Box)

u/Xen

love it!
u/tomxor

Scary !
u/joeytwiddle

#virus

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pavel

function u(t) {

for(w=c.width=1e3,i=99;r=10*i--;i?x.stroke():x.fill())x.beginPath(p=(1+t/2-r/w)%2),x.ellipse(480,270+20*S(p*40)/9**p+!i*w*(p-2),r,r/3,0,0,7)

Mar 6 2019 7:01 AM UTC

}// 140/140

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#water #drop

u/katkip

Looks good
u/aleamb

great!
u/mcdxn

damn!

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tomxor

function u(t) {

c.width=w=96
for(i=5e3;X=i%w,Y=i/w,i--;x.fillRect(X+2*Z,Y+4*Z,.6,1))Z=(.5+S(i/15+t*2)/2)*S(S(Y/8+t)+S(X/24+t)+t),Z=C(2*Z+S((X&Y)/(1+Z*Z))/8)

Mar 2 2019 7:46 PM UTC

}// 140/140

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Fractal Lake

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zanella

remix of d/12556 by u/Ath0r

function u(t) {

c.width|=0
f=(i,j)=>{x.beginPath(),x.lineWidth=j,x.ellipse(960,560,...i),x.stroke()}
f([r=300,r,0,0,7],9)
f([780,99,9+t,1.945,1.195],35)

Feb 28 2019 10:16 PM UTC

}// 136/140

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u/donbright

wheeeeeeee

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rrlyrae

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼👩👡👢🐱𞱩🀵𞱩𚰫𚑻𫐽𜱥𝀪𚁩𛐱𚐯𪐪𚠶𞱡𚰽𫐪𤰨𭀯𞐪𪐪𚠳𚐻𨠫👭𚡃𚁴𛰹𚡩𚠪𜰩𞱬🐲𝐵𛱩𛱩𞱦𫱲𚁲🐱𞱲🠮𜐻𬠭🐮𜐩𮱸𛡢𩑧𪑮𤁡𭁨𚀩𞱸𛡡𬡣𚀹𝠰𚱡𛀵𝀰𚱢𛀳𜀰𛱩𚠪𜰪𬠬𜀬𜐰𚐻𮀮𩡩𫁬𤱴𮑬𩐽𤠨𫀬𫀬𫀪𬠩𞱸𛡦𪑬𫀨𚑽𯐠`.replace(/u../g,'')))

Feb 28 2019 3:34 PM UTC

}// 140/140

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#compressed #solar system: #planets and #moons with approximate constant density planetary bodies

u/rrlyrae

Uncompressed, you can change "i<5" to whatever you want to have as many mini-moons orbiting about your moon as you want :)

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katkip

function u(t) {

// Transferring...








receiveMessage=pauseDemo=0;q="";l=q.length;for(i=616;i--;)q+=C(i+C(t+i/99)*10+t*29)<0?'0':'1'
throw q

Feb 28 2019 2:42 PM UTC

}// 128/140

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#binary #hax

u/rnbw

oh neat! i tried to do something like this once (never published it) but your execution is really good
u/Ath0r

cool!
u/joeytwiddle

#parallax
u/C010011012

throwing errors for animation? wow clever

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pavel

function u(t) {

for(c.width|=p=300;e=p--**.9%1;x.fillRect(960+r(0)/z,200+99/z,s=9*e/z,s))r=d=>p/(1+e*C(a=t/4+p))*C(a+p+d)+2*p/(1/e-e)*C(p+d),z=.5+r(1.6)/800

Feb 28 2019 6:54 AM UTC

}// 140/140

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Galaxy

u/pavel

300 bodies which individually only interact with an infinite mass at the center
u/pavel

Each body moves around an ellipse, the orbits are accurate. However, the movement speed is a very rough approximation.
u/pavel

Naively drawing an ellipse centers it around one of the focal points, however moving a body on this path slows the body down near this focal point and speeds it up near the other one.
u/pavel

The opposite effect is needed. So this code still moves a body around an ellipse but it re-centers the ellipse on the 'other' focal point.
u/pavel

In polar coordinates the difference between the x and y coordinates is a phase shift of pi/2 ~ 1.6

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Ath0r

function u(t) {

f=(i,j)=>{x.beginPath(),x.lineWidth=j,x.ellipse(960,560,...i),x.stroke()}
f([r=300,r,0,0,7],9)
for(i=9;i--;)f([600+20*i,100,9,2.07,1.07],35)

Feb 27 2019 9:41 PM UTC

}// 140/140

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Saturn #planets

u/Xen

nice!
u/tomxor

#saturn #graphic
u/katkip

#icon
u/Ath0r

I wanted to involve "t" to add some animation but no characters left :(

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