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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rodrigo.siqueira

remix of d/20662 by u/rodrigo.siqueira

function u(t) {

x.beginPath()
r=(i)=>S(t*6+i/2.7-3.6)*150+i
x.moveTo(960+C(t)*480,540+S(t)*480)
x.lineTo(r(960),r(540))
x.lineWidth=.7
t<6.28&&x.stroke()

Nov 18 2020 4:10 PM UTC

}// 137/140

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Fairy Star (Heptagram) #spirograph

u/danny@hille.dk

very aesthetically pleasing

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ciaccodavide

function u(t) {

m=(d=new Date()).getMinutes(h=d.getHours(x.font="9em'"))
x.fillText((k=String.fromCharCode)(55357)+k(56656+(h%12||12)+(m>29?11:-1)),888,606)

Nov 20 2020 1:42 PM UTC

}// 140/140

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Real time emoji clock

u/ciaccodavide

Add throw(d) to show the datetime
u/ciaccodavide

#clock

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Xen

remix of d/3199 by u/Xen

function u(t) {

with(x)for(t?X.push([Date.now()/t%2e3,i=X.length]):X=[];i--;fill())arc(X[i][0]-=T(i),X[i][1]+=3,49,!beginPath(fillStyle=R(9,9,X[i][1]/5)),9)

Nov 19 2020 6:19 PM UTC

}// 140/140

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Blue-Goo

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taupelink

remix of d/20630 by u/taupelink

function u(t) {

r=Math.random;for(i=k=214;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*5)*9,h=k*S(S(S(C(p=Y*S(q=X%3*2-2)-2+Y%1.5)))),x.fillStyle=R(h*p,h*q,2*h)

Nov 17 2020 1:17 AM UTC

}// 140/140

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d/20654

u/joeytwiddle

Entrance to sietch as perceived by an insect with compound eyes
u/tomxor

Nice description, (and dweet) :)

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dnmc

function u(t) {

r=Math.random
j=960+S(t)*400
k=540+C(t)*400
for(i=0;i++<80*t;){
j+=r()*8-4
k+=r()*8-4
x.fillStyle=R(0,(S(t*4)+1)*127)
x.fillRect(j,k,6,6)
}

Nov 17 2020 7:07 AM UTC

}// 139/140

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It's the circle of life...

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danny@hille.dk

remix of d/20689 by u/yonatan

function u(t) {

q=c.width=99;for(m=20;m--;)for(n=i=q;i--;x.fillRect(i,a*(25-m),2,q,x.fillStyle=R(m*9)))for(a=j=3;j--;a+=S(((t/m*q+i)*S(m*k))*k/9)/k)k=4**j

Nov 18 2020 7:25 PM UTC

}// 139/140

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golf and play

u/danny@hille.dk

-2 bytes -> q=c.width=99;for(m=20;m--;)for(n=i=q;i--;x.fillRect(i,a*(25-m),2,q,x.fillStyle=R(m*9)))for(a=j=3;j--;a+=S((t/m*q+i)*S(m*k)*k/9)/k)k=4**j*

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Xen

remix of d/20658 by u/dnmc

function u(t) {

eval(unescape(escape`𭀿𪠽𚁩🐱𩐳𚐫𤰨𭀩𚠴𜀰𞡸𛡦𪑬𫁒𩑣𭀨𜀬𜀬𮠽𜡥𜰬𮠬𬠽𣑡𭁨𛡲𨑮𩁯𫐩𒡦𫱲𚁫🐵𝀰𚱃𚁴𚐪𝀰𜀻𪐭𛐻𮀮𩡩𫁬𤡥𨱴𚁪𚰽𬠨𚐪𜐶𛐸𛁫𚰽𬠨𚐪𜐶𛐸𛀱𛀱𚐩𮀮𩡩𫁬𤱴𮑬𩐽𤠨𪠪𬠨𚐬𤰨𪱞𪠩𚡩𛁫𚡲𚀩𛀮𜰩`.replace(/u../g,'')))

Nov 17 2020 4:56 PM UTC

}// 123/140

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Had to play

u/magna

Glad you did

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Germain

function u(t) {

x.font="120px a"
x.fillText("🃏", C(t)*100+400+Math.random()*10, 200)
v=x.getImageData(0,0,999,999)
c.width=999
x.putImageData(v,0,10)

Nov 20 2020 10:52 PM UTC

}// 133/140

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#emoji

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rodrigo.siqueira

remix of d/20636 by u/ciaccodavide

function u(t) {

r=(i)=>i+(S(i/2+t*9))*150
x.beginPath()
x.moveTo(960+C(t)*480,540+S(t)*480)
x.lineTo(r(960),r(540))
x.lineWidth=.7
t<6.28&&x.stroke()

Nov 17 2020 4:32 PM UTC

}// 133/140

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Full circle with 8 spikes in 2 𝝅 seconds #spirograph

u/ciaccodavide

Cool!

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gamma_t

function u(t) {

x.clearRect(0,0,w=c.width,h=c.height)
x.beginPath()
g=a=>2+a+2*C(i)*a
for(i=0;i<7*t%6.4;)x.lineTo(h*g(C(i+=.05))/4,h*g(S(i))/4)
x.stroke()

Nov 20 2020 8:37 PM UTC

}// 138/140

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limaçon