Dwitter - javascript demos in 140 characters

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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geb

remix of d/9960 by u/geb

function u(t) {

w=c.width=1920;for(i=w;i>t;i--){x.strokeStyle=`hsl(${t*i},42%,42%,.42)`
x.strokeRect(w/2+T(i-t)*i,w/3+S(i+t)*i,i%420,i%420)}

Sep 20 2018 1:36 PM UTC

}// 125/140

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geb

remix of d/9918 by u/sChiab8

function u(t) {

w=1920;for(i=w;i>t;i--){x.strokeStyle=`hsl(${t*i},42%,42%,.42)`
x.strokeRect(w/2+S(i-t)*i,w/3+T(i+t)*i,i%t,i%42)}

Sep 20 2018 1:35 PM UTC

}// 114/140

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#background

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SodaPOP

remix of d/6999 by u/DirtyDan

function u(t) {

a=S(t)*6.5
c.width+=0
for(i=0;i<47;i++)
x.font=i*5+'px A',x.fillText("ploopy",1/S(a*i/47)+960-i*2,400*C(a*i/47)+630)

Sep 21 2018 1:34 PM UTC

}// 116/140

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scary ploopy

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SodaPOP

remix of d/4662 by u/JoshiRaez

function u(t) {

c.width|=0;for(i=0;i<19; i++){for(j=3; j>=-3; j=j-0.125){x.fillRect(i*192+C(t-i-j)*540/C(Math.abs(j/3)),540+540*S(j/2),j*5,j*5);}}//help

Sep 21 2018 1:27 PM UTC

}// 136/140

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SodaPOP

remix of d/9928 by u/anotherkitten

function u(t) {

if(!t)x.translate(960,540);x.fillStyle=(t%1<.5)?"#poopy":"#dd33dd48"
for(k=1500;k--;e=frame/30+k**.9,x.fillRect(k*S(e),k*C(e),10,10)){}

Sep 21 2018 12:57 PM UTC

}// 135/140

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andrey.pro7k

function u(t) {

eval(unescape(escape(`挮睩摴栽ㄹ㈰㭨㴱〰㭦潲⡩㴵㭩㬩筡㵩⨶〰⵴┵⨱㈰㭢㴨匨ⴭ椭縨琯㔩⤫ㄩ⨳㘷㭸⹦楬汒散琨愬〬栬戩㭸⹦楬汒散琨愬戫㌵〬栬ㅥ㌩絸⹦楬汓瑹汥㴧⍥㡣〳㌧㭸⹦楬汒散琨㈵〬⡓⠮㈪琫⸵⤫ㄮ㌵⤪㌶㜬栬栩`).replace(/u(..)/g,"$1%")))

Sep 18 2018 5:24 PM UTC

}// 140/140

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180 chars uncompressed ---> c.width=1920;h=100;for(i=5;i;){a=i*600-t%5*120;b=(S(--i-~(t/5))+1)*367;x.fillRect(a,0,h,b);x.fillRect(a,b+350,h,1e3)}x.fillStyle='#e8c033';x.fillRect(250,(S(.2*t+.5)+1.35)*367,h,h)

u/katkip

Flappy Bird
u/andreymarko

gay
u/joeytwiddle

Hey I'm doing really well at thi... oh

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katkip

remix of d/9938 by u/katkip

function u(t) {

if(!t)x.translate(1920,960);x.translate(-C(t**3/15)*9,-S(t*t/15)*9)
x.fillRect(0,0,6,6)
x.rotate(t*.9/99)

Sep 19 2018 11:48 AM UTC

}// 105/140

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Lol I made this during exam

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prplz

remix of d/9880 by u/Quant1um

function u(t) {

for(c.width^=i=0;++i<70;)for(j=-4;++j<4;x.fillRect(n-o,n+o+j*C(m)*60>>1,k=10-j,k))b=i/11,a=300+j*S(m=b/2+t)*30,n=C(b)*a+960,o=S(b)*a

Sep 18 2018 9:12 AM UTC

}// 132/140

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u/donbright

moebius?
u/aleamb

#moebius

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Noah

function u(t) {

[99,300,S(t*88)*99+200].map(r=>x.fillRect(850+S(t)*r+(f=~~t%3-1)*250,350+C(t)*r+Math.abs(f)*400,5,5))

Sep 18 2018 7:34 PM UTC

}// 101/140

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Not the same as previous, but went from 162 to 101, again huge thanks to u/yonatan

u/Noah

How to codegolf "101" course
u/username

#waitforit

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katkip

remix of d/9939 by u/katkip

function u(t) {

if(!t)x.translate(960,540);x.translate(1,0)
x.fillRect(0,0,S(t)*2,S(frame)*500)
x.rotate(133)

Sep 19 2018 11:54 AM UTC

}// 94/140

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Growing Flower