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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iverjo

remix of d/1281 by u/iverjo

function u(t) {

for(i=24;i--;)x.fillRect(960+22*i*C(a=t*i/8),520+22*i*S(a),b=20+i,b)

Apr 24 2020 11:51 AM UTC

}// 68/140

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#circlechallenge

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KilledByAPixel

remix of d/18431 by u/KilledByAPixel

function u(t) {

c.style.filter=`blur(2px)sepia()hue-rotate(${t*99}deg)brightness(5`
for(i=c.width|=0;i--;)x.arc(960,540,1150,q=S(i+t/2e3)*99,q)
x.fill()

Apr 22 2020 9:07 PM UTC

}// 136/140

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Strange Plasma

u/KilledByAPixel

#plasma

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joseprio

remix of d/18460 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𪑬𫁒𩑣𭀨𜀬𜀬𨰮𭱩𩁴𪁼🐰𛀲𩐳𚐬𩡩𫁬𤱴𮑬𩐽𘠣𜁆𡠢𛁴🐰𯁴𚠹𛁭👴𙐱𜠬𩡯𫡴🐢𝠴𩑭𙰢𛁴𬡡𫡳𫁡𭁥𚀹𝠰𛀵𝀰𚐬𬡯𭁡𭁥𚀮𝐲𝀪𫐩𛁦𪑬𫁔𩑸𭀨𤱴𬡩𫡧𛡦𬡯𫑃𪁡𬡃𫱤𩐨𝐵𜰵𝰬𝐶𝠵𝠫𚁴𛰱𜠥𜐲𚰲𜰭𫐩𙐱𜠩𛀭𝐱𜠬𝀳𜠩`.replace(/u../g,'')))

Apr 24 2020 8:21 AM UTC

}// 135/140

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Fixed centering for Mac

u/katkip

#clock

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BriSeven

remix of d/18368 by u/veubeke

function u(t) {

π=3.14
T=(x)=>π-(.5*x/π%1)*π*2
c=(x)=>(y=(x*x)**.5,16*x*(π-y)/(5*π*π-4*y*(π-y)))
x.fillRect(950,540,c(T(t+π/2))*300,c(T(t))*300)

Apr 24 2020 2:46 PM UTC

}// 128/140

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Bhaskara's Sine Approximation Formula #circlechallenge

u/BriSeven

what's kinda weird is the value of pi doesn't seem to matter much, it still makes a great looking circle.

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Xen

remix of d/18463 by u/KilledByAPixel

function u(t) {

with(x)t?c.style.background=R(strokeText("-",39,lineWidth=17)):c.width=50,strokeStyle="#ffa500",fillStyle='#FFf',fillText('Dweet hub',0,18)

Apr 23 2020 8:44 PM UTC

}// 139/140

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no comment

u/DataMeta

a comment
u/katkip

addicting

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katkip

function u(t) {

t?0:c.outerHTML=`<svg height="300" width="300"><circle cx="150" cy="150" r="150" fill="#f00"/></svg>`;

Apr 24 2020 10:20 AM UTC

}// 102/140

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working #svg #circlechallenge visible on HC theme

u/donbright

clever

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Xen

remix of d/18454 by u/ersagun

function u(t) {

t?x.rotate(!x.fillRect(0,0,5,399)):x.translate(960,540)

Apr 23 2020 2:37 PM UTC

}// 55/140

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#circlechallenge more Minimal

u/ersagun

just another way to exploit irrational numbers
u/Xen

Reality is chaos, Chaos is a fractal, All mostly infinite if you ask me

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KilledByAPixel

remix of d/18406 by u/KilledByAPixel

function u(t) {

for(c.width|=i=z=1001;i--;)
x.arc(z,540,500,q=S(i*Math.PI*99/1e3+t/z)*t+1.57,q)
x.fill()

Apr 22 2020 4:56 AM UTC

}// 88/140

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u/KilledByAPixel

#waitforit
u/ersagun

#circlechallenge
u/joeytwiddle

One of the best examples of this effect IMO #trippy
u/donbright

oh my gourd

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magna

function u(t) {

throw'⬤'

Apr 23 2020 2:33 AM UTC

}// 8/140

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#circlechallenge

u/joeytwiddle

Nice! :-D

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veubeke

function u(t) {

T=t<1?x.translate(960,540,c.width^=0):(t-1)**2
x.font='bold 8em"'
x.fillStyle='#000'
x.rotate(T)
x.fillText('circle',-15,0,(t<1?S(t):1)*500)

Apr 22 2020 5:48 PM UTC

}// 140/140

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Literal #circlechallenge