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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taupelink

remix of d/22303 by u/taupelink

function u(t) {

for(i=k=720;--i;x.fillRect(k+X*C(Y),k+X*S(Y),q>>t,q/t))f=i*t,X=f*f%2e3,Y=X*f%7,x.fillStyle=R(q=i*S(Y%S((X/k)**S(Y*6)))/5,X%q,X*S(q/k-Y),.2)

Apr 12 2021 4:25 AM UTC

}// 139/140

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d/22448

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erin

function u(t) {

x.fillRect(960+S(t)*99,540+S(t+1.57)*99,9,9)

Apr 12 2021 3:30 PM UTC

}// 44/140

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who needed cosine anyway

u/erin

#circlechallenge
u/KilledByAPixel

you can also do +11
u/pavel

Who needs cosine OR sine? [X,Y]=t?[.995*X+Y/10,.995*Y-X/10]:[0,99];x.fillRect(960+X,540+Y,9,9)

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EliteDaMyth

remix of d/22427 by u/deltuhvee

function u(t) {

eval(unescape(escape`𩡯𬠨𭁼𯀨𨐽𨠽𜠵𜀩𛁣𛡷𪑤𭁨🐲𩐳𛁩🐳𩐳𞱩𛐭𞰩𬰽𩐽🠵𜀰𚡓𚁴𚱥𚐫𜑥𜰬𭐽𩐽🠵𜀪𠰨𭀫𩐩𚰱𩐳𛁰👛𬰨𜀩𛁳𚀲𚐬𬰨𝀩𛀱𩐳𛁵𚀰𚐬𭐨𜠩𛁵𚀴𚐬𜐰𜁝𛁸𛡦𪑬𫁒𩑣𭀨𨐽𚁰𦱶👾勺𝀪𣑡𭁨𛡲𨑮𩁯𫐨𚐩𧐫𨐩𛰲𛁢🐨𬁛𭠫𝁝𚱢𚐯𜠬𝰬𝰩`.replace(/u../g,'')))

Apr 12 2021 2:46 PM UTC

}// 135/140

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shorten by 1 char

u/EliteDaMyth

test

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lars-erik

function u(t) {

c.width=1920;t*=-5;r=3.14/180;x.translate(960,512);
for(i=0;i<2880;i+=5)x.lineTo(C(r*(t+i)**1.3)*i/2,S(r*(t+i)**1.3)*i/2);
x.stroke()

Apr 13 2021 8:00 AM UTC

}// 133/140

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Spiraling fun (newb)

Show more comments…
u/Xen

Welcome to the dwitter family!
u/lars-erik

Thank you, @Xen! :) Hope to learn and grow. Looks like an awesome lil' community.
u/EliteDaMyth

for(c.width=1920,t*=-5,r=3.14/180,x.translate(960,512),i=0;2880>i;i+=5)x.lineTo(C(r*(t+i)**1.3)*i/2,S(r*(t+i)**1.3)*i/2)x.stroke()
u/EliteDaMyth

for(c.width=1920,t*=-5,r=3.14/180,x.translate(960,512),i=0;2880>i;i+=5)x.lineTo(C(r*(t+i)**1.3)*i/2,S(r*(t+i)**1.3)*i/2);x.stroke() 131 bytes. Disregard above comment of mine
u/Xen

for(c.width|=i=2e3;i-=5;x.lineTo(960+C(z=.017*(5*t+i)**1.3)*i/2,512+S(z)*i/2));x.stroke() 89bytes
u/lars-erik

LOL! I'm in awe, u/Xen 😆 Gonna come back to that one often for inspiration I think. Also hats off to u/EliteDaMyth. 🙏
u/danny@hille.dk

Welcome to dwitter u/lars-erik, Ud fra dit navn vil jeg antage at du er dansker :-)
u/lars-erik

Supertak,, u/danny@hille.dk. Fra broderlandet i nord. ;)

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danny@hille.dk

function u(t) {

for(i=2304;i--;x.fillRect(X*30,Y*30,30,30))x.fillStyle=R(Y=i>>6,S((X=i%64)/4)*C(Y/6+S(X/9-t)+t)*255)

Apr 12 2021 1:20 PM UTC

}// 100/140

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contone

function u(t) {

s=S(t*9)
f=frame
b=(f/100)%7
x.setTransform(s*50,0,0,10,b*300-s*300,1080)
x.fillStyle=R(f%20*8,f%10*16,f%40*4)
x.fillText(`⬤`,0,-f%100)

Apr 13 2021 7:54 PM UTC

}// 135/140

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u/pavel

Check out 'hsl' for a different way to do color, for example d/20919

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KilledByAPixel

remix of d/22480 by u/KilledByAPixel

function u(t) {

with(x)getImageData(X=Math.random(beginPath(globalCompositeOperation='xor'))*1920,Y=X*X%1080,1,1).data[3]|!t&&fill(arc(X,Y,99/(.1+t),0,7))

Apr 14 2021 7:17 PM UTC

}// 138/140

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Negative Space 2

u/KilledByAPixel

Try tweaking the 99/(.1+t) radius value or change |!t&& to || to invert

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mxfh

remix of d/22439 by u/mxfh

function u(t) {

for(d=x.getImageData(I=0,0,i=w=c.width=256,w);i--;)for(j=w;j--;I+=4)d.data.set([(f=i^j)%w*T(f+t*30),f%9*w,j,w],I)
x.putImageData(d,0,0)

Apr 12 2021 5:35 PM UTC

}// 135/140

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peterBandsholm

remix of d/22490 by u/peterBandsholm

function u(t) {

c.width=a=1920;for(i=0;i<a;i++)x.fillRect((S(t*1*i/a*S(i/a))+2)*480,i,i*S(a),33)

Apr 14 2021 4:57 PM UTC

}// 81/140

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bigFatSnake

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peterBandsholm

remix of d/22483 by u/ketolli

function u(t) {

c.width=a=1920;for(i=0;i<a;i++)x.fillRect((T(t*i)+2)*480,i,S(i/60+t)*90,i/60)

Apr 14 2021 4:41 PM UTC

}// 78/140

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tv noise