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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andrea270872

remix of d/12953 by u/andrea270872

function u(t) {

c.width+=C(t)*2
for(j=1;j++<9;x.fillStyle='#02'+j)for(i=18;i--;){F=(S(i/2)*C(i/4+j+t))**.1;x.fillRect((i+j/8)*98,50*j-F*10,99,80*j+F*20)}

Apr 1 2019 6:57 PM UTC

}// 137/140

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Running in the maze (with more balanced "zoom")

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andrea270872

function u(t) {

c.width|=0
x.fillStyle=`hsl(${S(t)*60%60},99%,50%,.7`
for(j=9;j--;)for(i=24;i-=2;)x.fillRect(99+(j*3+C((j+i+t)*9))*60,1e3-i*40,288-i*12,80)

Mar 29 2019 1:22 PM UTC

}// 139/140

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fire tentacles

u/joeytwiddle

#fire simple idea nice effect
u/rodrigo.siqueira

#tentacle

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vinca

function u(t) {

eval(unescape(escape`䄽湥眠䑡瑥┳〿〺㤻景爨挮睩摴栽眽㔰〬硛爽❦楬汒散琧崨〬〬眬眩Ⱪ㴳〰㭩ⴭ㬩景爨樽㈰㭪ⴭ㬩砮晩汬却祬攽刨椫樬䄪㈰ⰴ〰⵩⵪⤬硛牝⡩幪⨨椥㈿䌺匩⡴⨮ㄩ⨹㤬椫䄬ㄫ䄯㤬ㄩ`.replace(/u(..)/g,"$1%")))

Mar 29 2019 4:02 PM UTC

}// 127/140

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geb

remix of d/12933 by u/vinca

function u(t) {

for(i=3e3,t*=99;i--;)x.fillRect(t|i,t,1,1)

Mar 30 2019 3:14 PM UTC

}// 42/140

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u/DataMeta

This must be nearly the shortest dweet
u/Xen

nice find geb, check 2923 datameta, altho xem and others have done smaller ;)
u/katkip

Wow!
u/geb

better tag them from now on #Sierpinski
u/pavel

Basically the same thing but in 40: for(i=3e3,t*=99;i--;)x.fillText(1,t|i,t)
u/Xen

37 but not as good: for(t*=i=1e3;i--;)x.fillText(i,t|i,t)

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jviide

function u(t) {

c.width=384
for(k=i=0;i<4752;i++)j=i%22,u=60*C(j/1.74+2*t+S(i/900)),x.fillStyle=j%2?"#00d":"#0f8",k>u&&x.fillRect(192+u,i/22,k-u,1),k=u

Mar 26 2019 8:24 PM UTC

}// 136/140

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Embossed spinner

u/DataMeta

Great first dweet! Welcome
u/aleamb

yeah, amazing!
u/lionleaf

That's a #twister with a really great #texture
u/Xen

love it
u/durian-favored-monster

nice

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katkip

function u(t) {

if(!t){d=[];for(i=384;i--;)d.push(0)};for(i in d){x.fillStyle=R(d[i]*1e3),x.fillRect(i*5,0,5,5),d[i]=S(t*C(S(t)*i/99)*i)}x.drawImage(c,0,5)

Mar 29 2019 2:54 PM UTC

}// 139/140

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MangoBox

function u(t) {

//c.width=1920
for(i=-10;i<11;i++){
x.fillStyle=R(S(t)*160,C(t)*200,C(t)*70+128,1)
x.fillRect(900+S(0.28*i*t)*800,550+C(i*t*0.5)*500,25,25)}

Apr 1 2019 4:00 AM UTC

}// 140/140

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mesh

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vinca

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㵷㴹㘰Ⱪ㴶㭩㸰㭩ⴽ⸳⥦潲⡪㴵㭪㸰㭪ⴽ⸱⥁㴨䈽㔫⠲⭓⡴⨱〩⨮㈩⩃⡩⤩⩃⡪⤬夽䈪匨権ⱚ㴲⩓⡩⤬堽䌨琩⩁ⵓ⡴⤪娬娽匨琩⩁⭃⡴⤪娬砮晩汬剥捴⡷⭘⼨娭㴲〩⩷ⰵ㐰⭙⽚⩷ⰲⰲ⤻`.replace(/u(..)/g,"$1%")))

Mar 30 2019 12:02 PM UTC

}// 135/140

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for(c.width|=w=960,i=6;i>0;i-=.3)for(j=5;j>0;j-=.1)A=(B=5+(2+S(t*10)*.2)*C(i))*C(j),Y=B*S(j),Z=2*S(i),X=C(t)*A-S(t)*Z,Z=S(t)*A+C(t)*Z,x.fillRect(w+X/(Z-=20)*w,540+Y/Z*w,2,2)

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robbyg

remix of d/12870 by u/vinca

function u(t) {

c.width|=0,Z=16
for(Y=V=34,A=.2;V>-Y;V--)for(H=X=60;H>-X;H--)T(A*H)*T(A*V)>S(A*H*A*V*S(t))&&x.fillRect(H*Z+X*Z,V*Z+Y*Z,Z,Z)

Mar 28 2019 3:00 AM UTC

}// 123/140

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u/katkip

Wow

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katkip

function u(t) {

r=Math.random;if(!t){m=[];for(i=99;i--;)m.push([0,0])}for(i in m){x.fillRect(960+(m[i][0]+=r()/5-.1)*50,540+(m[i][1]+=r()/5-.1)*50.,5,5)}

Mar 29 2019 2:10 PM UTC

}// 137/140

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u/andrea270872

Langton ants?!
u/katkip

Nope