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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veubeke

function u(t) {

for(Y=H=1080;Y--;)
x.fillRect(X=t*60|0,Y,1,1,x.fillStyle=R($=(Math.random(m=Math.hypot(X/1920,Y/H)/Math.SQRT2)+((X^Y)&64?m:1-m)>1)*255,$,$))

Apr 17 2020 7:10 AM UTC

}// 140/140

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One bit gradient

u/Xen

nice
u/Cloud

#sampling
u/DataMeta

neato
u/tomxor

interesting

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doughno

remix of d/18331 by u/doughno

function u(t) {

p=3.15
for(c.width|=i=0;i++<2;){
b=t+(p/2)*i
L=180*S(b%p)
x.beginPath()
x.arc(960,540,400*S(b/2%(p/2))-L/2,0,8)
x.lineWidth=L
x.stroke()}

Apr 19 2020 10:50 PM UTC

}// 137/140

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katkip

function u(t) {

f=(X,Y,s)=>{for(k=50;k--;)x.fillRect(X-s/k/2,Y-k*8,s/k,4*s),x.fillRect(X-15,Y+149+k*C(t),30,99)};c.width|=z=500;f(z+S(t)*z,z,50)

Apr 18 2020 8:59 PM UTC

}// 128/140

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Vaccine against coronavirus. This was supposed to be a default where the rectangles are vaccines but no space left for the for ;( please golf it for me and I give you a cookie.

u/iznax

for(c.width|=z=500,i=10;--i;)for(s=k=50;k--;)for(j=2;j--;)x.fillRect(i*100+z+S(t)*z-(j?s/k/2:15),z+(j?-k*8:149+k*C(t)),j?s/k:30,j?4*s:99)

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tomxor

remix of d/18298 by u/veubeke

function u(t) {

for(Y=1080;Y--;)x.fillRect(X=frame,Y,1,Math.hypot(X,Y)/270+(X^=Y)%8+(X>>4&4)>8)

Apr 17 2020 8:11 PM UTC

}// 79/140

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Deterministic 1-bit gradient

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katkip

function u(t) {

f=(X,Y,n=16)=>n<2?S(X*Y+1)*255:f(Y*2-X*Y,Y*Y-X,n-1);
t||(y=0);for(i=384;i--;)x.fillStyle=R(f(i/39-2.4,y/39-3)),x.fillRect(i*5,y*5,5,5);y++

Apr 20 2020 7:01 PM UTC

}// 138/140

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I discovered a fractal

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Georges-Abitbol

remix of d/18356 by u/Georges-Abitbol

function u(t) {

c.width=1920
for(i=-4355;i<4355;i++)
x.fillRect(960+C(t*i/500)*250*(1+C(i/200)),540+S(t*i/500)*250*(1+C(i/200)),5,5,1)

Apr 20 2020 7:01 PM UTC

}// 118/140

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Georges-Abitbol

function u(t) {

c.width=1920
for(i=0;i<479;i++)
{b=S(i*0.013);for(j=3;j<70*C(3*t)*C(3*t);j+=2)
b+=S(i*0.013*j)/j;x.fillRect(4*i,540+b*300,9,9,0)}

Apr 20 2020 5:02 PM UTC

}// 129/140

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The Gibbs phenomenon

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Georges-Abitbol

function u(t) {

c.width=1920
for(i=0;i<479;i++)
{b=S(i*0.013);for(j=3;j<70*C(3*t)*C(3*t);j+=2)
b+=S(i*0.013*j)/j;x.fillRect(4*i,540+b*300,9,9,0)}

Apr 20 2020 5:01 PM UTC

}// 129/140

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c.width=1920 for(i=0;i<479;i++) {b=S(i*0.013);for(j=3;j<70*C(3*t)*C(3*t);j+=2) b+=S(i*0.013*j)/j;x.fillRect(4*i,540+b*300,9,9,0)}

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Xen

remix of d/18308 by u/Cloud

function u(t) {

p="🤡"
eval(unescape(escape`𮀮𩡯𫡴🐢𜰲𩑭𙰢𛁸𛡦𪑬𫁔𩑸𭀨𬀬𝠰𜀫𠰨𭀪𜰩𚠲𞐬𜐳𜀰𚐊𩡯𬠨𮠽𪐽𞀳𞱩𛐭𞱸𛡦𪑬𫁓𭁹𫁥👒𚁚👩🀱𜱼𯁩🠱𞐿𜀺𮠬𪐼𜐳🰰𞡺𛑩𚱓𚁩𚱴𚐪𞐬𦠬𛠲𚐩𮀮𩡩𫁬𤡥𨱴𚀰𛀱𩐳𛑩𚠱𞐬𜡥𜰬𮠩𞱴𪁲𫱷𘀢𢁩𮑡𘁇𩑯𬡧𪑥𘐢`.replace(/u../g,'')))

Apr 18 2020 2:46 AM UTC

}// 134/140

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🎈

u/katkip

#movie
u/Cloud

Scary )

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katkip

function u(t) {

eval(unescape(escape`𭰽𞐹𞱦🐨𦀬𦐬𬰽𝐰𛁮🐲𞐩🐾𫠿𚁸𛡦𪑬𫁓𭁹𫁥👒𚁮𚠵𛁘𛰶𛁙𛰵𛀲𛱮𚐬𮀮𩡩𫁬𤡥𨱴𚁘𛁙𛁳𛀴𚡳𚐬𩠨𦀫𬰪𠰨𭀫𫠭𦀯𭰫𦐯𭰩𚠴𛁙𛑳𚡓𚁴𚱮𛑘𛱷𛑙𛱷𚐪𝀬𬰯🐱𛠱𛁮𛐱𚐩𞡸𛡦𪑬𫁒𩑣𭀨𦀬𦐬𬰬𝀪𬰩𞱦𫱲𚁩🐹𞱺🐵𜀰𛁩𛐭𞰩𩠨𭀪𭰫𪐪𭰬𮠫𭀪𭰩`.replace(/uD./g,'')))

Apr 18 2020 2:52 PM UTC

}// 140/140

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this was a default...

u/Xen

this is sexy
u/sigveseb

Yes this is niice