Dweets awesomed by u/CalSch

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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ellisk1

function u(t) {

q=t+20;for(c.width=i=2e3;i--;)x.fillRect(1e3+500*S(a=(q-=.01)+t/9),1280-210*Math.abs(S(q*3.75))+34*(t-q),w=15+5*C(a),w)

Nov 21 2018 6:43 PM UTC

}// 119/140

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Bouncer #beesandbombs

u/aleamb

fucking awesome!

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ellisk1

remix of d/11012 by u/ellisk1

function u(t) {

for(c.width|=i=3;i--;)x.arc(960,540,450*i*i,3.1,0);x.fill('evenodd');for(j=3e3;j--;)x.fillStyle=R(9,x.fillRect(2e3*S(j*j+t/9),j/2,j,5),j/55)

Nov 18 2018 5:05 PM UTC

}// 140/140

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Moonrise

u/joeytwiddle

Beautiful!
u/katkip

This is nice! #art #landscape #waves
u/joeytwiddle

Not a #sunset because it's the #moon!

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pavel

function u(t) {

with(x)for(k=n=j=255;j--;k=2,fill())for(beginPath(fillStyle=R(T=(t^k)%2*128,T,i=4));i--;)arc((j%9-t%1)*n+T,(j>>4)*n+T,64*k,a=(i-t%1)*11/7,a)

Nov 13 2018 2:29 AM UTC

}// 140/140

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u/yonatan

arc?!
u/anotherkitten

oh you sly dog very well done
u/pavel

:)
u/jylikangas

Very cool! You can save 3 bytes by removing the unnecessary %1 from t when calculating a and also doing <<7 instead of *128. If someone is wondering how this works using a+1 instead of a at the end may help. :)
u/katkip

#beesandbombs
u/pavel

Removing %1 at the end breaks the animation on my iPhone.

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BalintCsala

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㵩㴹㭩ⴭ㭸⹴牡湳景牭⡫㴮㘲⩃⡡㵓⡴⤪ㄮ㔷⤬猽⸶㈪匨愩Ⱝ猬欬眬眩⥸⹲散琨ㄬㄬ砮汩湥坩摴栽眽㌰〬眩ⱸ⹱畡摲慴楣䍵牶敔漨⡺㴱㔰⤫匨琩⩺ⱺⵓ⡴⤪稬眬眩㭸⹳瑲潫攨⤻`.replace(/u(..)/g,"$1%")))

Nov 8 2018 7:58 PM UTC

}// 131/140

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Fibonacci spiral

u/katkip

Owwww woottt thats awesome
u/rodrigo.siqueira

SOURCE CODE: for(c.width|=i=9;i--;x.transform(k=.62*C(a=S(t)*1.57),s=.62*S(a),-s,k,w,w))x.rect(1,1,x.lineWidth=w=300,w),x.quadraticCurveTo((z=150)+S(t)*z,z-S(t)*z,w,w);x.stroke();
u/rodrigo.siqueira

Animated Golden Rectangle #Fibonacci Sequence
u/vain

very cool golden ratio / rectangle fx. (never seen before like this, great!)

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yonatan

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㵩㴵ㄲ㭩ⴭ㭸⹦楬汒散琨㤶〫瀮砪瀮眬㔴〫瀮礪瀮眬瀮眬瀮眩⥰㵮敷⁄位䵡瑲楸⡛⸮⸧㌰〰〳〰〰㌵〰〰❝⤮牯瑡瑥䅸楳䅮杬攨琬琬〬琪㤹⤮瑲慮獦潲浐潩湴⡮敷⁄位偯楮琨椾㸶☷Ⱪ㸾㌦㜬椦㜩⤻`.replace(/u(..)/g,"$1%")))

Nov 8 2018 10:26 AM UTC

}// 140/140

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for(c.width|=i=512;i--;x.fillRect(960+p.x*p.w,540+p.y*p.w,p.w,p.w))p=new DOMMatrix([...'3000030000350000']).rotateAxisAngle(t,t,0,t*99).transformPoint(new DOMPoint(i>>6&7,i>>3&7,i&7));

u/katkip

This is nice
u/iverjo

Cool!
u/katkip

#transpose

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tomxor

function u(t) {

c.width=w=120
for(i=w*33;i--;x.fillRect(i%w,i/w*2,1,2))f=i%w+t*60,n=T(0|(i/w+f^f-i/w)/(t**.7+6)),x.fillStyle=R((n&1)*i/n/8,n**n,(n&3)*i/n/4)

Nov 3 2018 5:53 PM UTC

}// 140/140

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#retro #fractal #game

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u/tomxor

For the lazy game designer... Just add chip tunes and a player :D
u/tomxor

#crt #degauss #sidescroller
u/magna

Awesome!
u/magna

I had a RGB CRT setup, but I hadn't been able to fit any interesting patterns: d/7512
u/tomxor

I had a look at yours magna, they are true crt, much more realistic i think. The scan lines on this are just a sideeffect I exploited and it was easy to add colour distortion in the R().
u/magna

Here we go: d/10843
u/C010011012

is it a cellular automata?
u/tomxor

Yes and no, it's a fractal n=T(0|(i/w+f^f-i/w)/(t**.7+6)) which is just a more elaborate variation of serpinsky triangles to produce more interesting patterns. Some fractals are automata, but not all automata are fractals, see here: https://en.wikipedia.org/wiki/Rule_90
u/tomxor

The implication is serpinsky triangles are computationally reducable, meaning it does not have to be computed in the same way as a cellular automata i.e state can be computed at step t directly without traversing intermidiate steps.

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New_Core

function u(t) {

for(c.width|=i=40;i--;)x.fillRect(-99+(a=i%4-2)*i+i*C(a*1+-t*5+.6)+t%11*199,499+i*S(a*1+i/9-t*5),20,20)

Oct 31 2018 10:11 AM UTC

}// 103/140

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worst (4legged?) spider ever... I challange you to do a better one ;)

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u/katkip

not worst. it is a cool Fancy Pants Spider
u/magna

Smart!
u/lionleaf

Snake-spider
u/joeytwiddle

:-D #creepy crawly
u/iverjo

#spider
u/alice-mx

he's beautiful don't you judge him

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pavel

function u(t) {

for(c.width|=i=100;i--;)
for(j=50;j--;)
s=20*S((i|j)-t/2)**20,  // Then a miracle occurs
x.fillRect(10+20*i-s/2,10+20*j-s/2,s,s)

Oct 31 2018 3:37 AM UTC

}// 128/140

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#sierpinski

u/joeytwiddle

Transient overlapping Sierpinskis. Lovely.

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anotherkitten

function u(t) {

g=(z,y)=>S(z+y)*z*C(y+z)*y/2%200;j=t*60
for(z=1940;z-=20;)
for(y=1120;y-=20;x.fillStyle=R(k=g(z/10+j,y/10+j),k,k))x.fillRect(z,y,-20,-20)

Oct 29 2018 3:32 AM UTC

}// 137/140

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anxious caverns

u/joeytwiddle

lol

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pavel

remix of d/10653 by u/anotherkitten

function u(t) {

with(x)for(c.width=-1,translate(150,i=84);--i;rotate(t),t=2.1,fill(new Path2D('M67 28 9-72-9-72 37 11-19 11-28 25')))fillStyle=R(a=50*i,a,a)

Oct 24 2018 8:24 PM UTC

}// 140/140

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Show more comments…
u/yonatan

hah! - works as a separator
u/anotherkitten

dang, well done. wasn't sure if it was doable.
u/lionleaf

Nicely done!
u/aleamb

cool!
u/magna

damn.
u/joeytwiddle

Very good
u/katkip

Awesome!
u/katkip

#path2d
u/pavel

#uncompressed in black and white

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