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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katkip

function u(t) {

c.width^=0;f=q=>{for(i=0;i<90;i++)x.beginPath(),x.arc(q,540,i*i/9,0,7),x.stroke()}
f(t*80);f(1920-t*80)

Jan 12 2019 10:25 AM UTC

}// 103/140

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Interesting #moire

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JWinslow23

function u(t) {

eval(unescape(escape`堽䵡瑨⹲慮摯活䘽猽㹳⹲敤畣攨⡡ⱪⱩ⤽㹡⬽坛楝ℽ樬〩㭷㵴㽆⡶㵷⹭慰⡪㴾堨⤼⸰㌿却物湧⹦牯浃桡牃潤攨㌲⭘⠩⨹㔩㩪⤩㹆⡷⤿眺瘺嬮⸮圽≍䕔䡉之匠䥔⁉匠䱉䭅⁁⁗䕁卅䰢崮晩汬怠总瑨牯眠眮橯楮恠`.replace(/u(..)/g,"$1%")))

Jan 12 2019 10:10 PM UTC

}// 138/140

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Methinks it is like a weasel...

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joeytwiddle

remix of d/11709 by u/joeytwiddle

function u(t) {

t%1<.01&&(p=(X,Y,W,I,H=W/2)=>H>1?[0,1,2,3].map(i=>p(X+i%2*H,Y+H*(i>1),H,I*Math.random()**.2)):x.fillRect(X,Y,I,I))(0,0,c.width=R=512,5)

Jan 10 2019 10:29 AM UTC

}// 135/140

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golfed #recursive #fractal #cloud

u/katkip

#massive
u/joeytwiddle

guess: What happens if you remove one of the numbers from the list?
u/f8f82804

Neat trick with just three numbers :) It took me a minute...

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katkip

function u(t) {

c.width*=1;for(i=9;i--;)for(j=9;j--;)x.fillRect(400+i*100+S(t)*300,400+j*24+S(i+t)*30,50,15)

Jan 11 2019 1:50 PM UTC

}// 92/140

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#default made of defaults

u/joeytwiddle

Defaultception! What if those defaults were also made of defaults?

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katkip

remix of d/11756 by u/katkip

function u(t) {

c.width*=1;t||(V=0,B=0,n=960,m=540);c.onmousemove=e=>{X=e.x*1.4,Y=e.y*1.4};n<X?V++:V--;m<Y?B++:B--;n+=V;m+=B;x.arc(n,m,30,30,0,7),x.fill()

Jan 12 2019 11:33 AM UTC

}// 138/140

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u/Undefined

ReferenceError
u/katkip

^ yes. move your mouse
u/13thptr

gr8 inertia

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katkip

function u(t) {

t||(V=0,B=0,n=960,m=540);c.onmousemove=e=>{X=e.x*1.4,Y=e.y*1.4};n<X?V++:V--;m<Y?B++:B--;n+=V;m+=B;x.fillRect(n,m,10,10)

Jan 12 2019 11:31 AM UTC

}// 119/140

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!! before entering the canvas with the cursor, #fullscreen! It simulates quadratic gravity, not the Newtonian one! only 119 bytes, my own gravity system, inspired from u/metamero 's projects! There is no infinite velocity bug so the rectangle will not disappear so fast. If you have entered the canvas and you didn't fullscreen, reset the project by adding inoffensive changes to the script, then fullscreen. #interactive #physics #gravity

u/metamero

beautiful

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Xen

remix of d/6898 by u/loni_art

function u(t) {

t?a=i=44:x.fillRect(0,0,2e3,2e3);
for(;i--;x.fillRect(i*a,(9+T(i+t))*a,a,a))
x.fillStyle=R(...[1,9,i].map(d=>127*(C(d+i*2+t))))

Jan 10 2019 4:29 PM UTC

}// 127/140

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veubeke

function u(t) {

c.width^=0
x.globalCompositeOperation='xor'
for(i=1300;i--;)x.fill(P=new Path2D,P.arc(960+C(T=i/6*(5+t/500))*(50+T),540+S(T)*(50+T),50,0,7))

Jan 9 2019 8:13 PM UTC

}// 140/140

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username

remix of d/11752 by u/username

function u(t) {

for(c.width|=m=0;x.rotate(C(t))||x.translate(S(t)*99,99)||m<999;x.fillStyle=`hsla(${++m**2},99%,34%,0.1`)a=942*S(t/m)**2,x.fillRect(a,a,a,a)

Jan 12 2019 4:34 PM UTC

}// 140/140

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swirl?

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stellartux

function u(t) {

c.width^=0
v=99,z=999
x.font='128px a'
x.translate(z,v)
for(i=0;i<z;i+=v)for(j=v;j<z;j+=v){x.rotate(C(z))
x.fillText('🥝',i,j+v*S(t+i*v))}

Jan 9 2019 7:59 AM UTC

}// 137/140

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Floating in the kiwi dimension

u/metamero

it works in mozilla (chrome won't)
u/joeytwiddle

Working here in Chrome for Linux. May just be the emoji set?
u/f8f82804

#emoji