Dweets awesomed by u/Cloud

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.

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Current theme challenge: #Opposites

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metamero

remix of d/11172 by u/metamero

function u(t) {

eval(unescape(escape`挮睩摴栽ㄹ㈰㭣⹳瑹汥⹢慣歧牯畮搽✣㤹㤧㭦潲⡰㴮㔻瀼㤹㬫⭰⥦潲⡱㴰⸵㭱㰹㤻⬫焩睩瑨⡸⥢敧楮偡瑨⠩ⱡ牣⡲㵰⨹㤬猽焪㤹ⰱ㌬〬㜩ⱦ楬汓瑹汥㴧⍦晦✬晩汬⠩ⱦ楬汓瑹汥㵒⠩ⱦ楬汒散琨爭㤱ⱳⴹㄬ㠳ⰸ㌩`.replace(/u(..)/g,"$1%")))

Nov 27 2018 12:01 PM UTC

}// 140/140

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Find the Black Dots - Scintillating Grid Illusion

u/metamero

c.width=1920;c.style.background='#999';for(p=.5;p<99;++p)for(q=0.5;q<99;++q)with(x)beginPath(),arc(r=p*99,s=q*99,13,0,7),fillStyle='#fff',fill(),fillStyle=R(),fillRect(r-91,s-91,83,83)
u/metamero

#OpticalIllusion #Scintillating #Grid #Illusion
u/katkip

#illusion
u/metamero

#ScintillatingGridIllusion

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katkip

function u(t) {

c.style.background='#eee';c.width=400;for(n=900;n--;)x.lineTo(200+S(n*n+t)*200,114+C(n*n+n)*200);x.fill()

Nov 26 2018 2:38 PM UTC

}// 105/140

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Electricity

u/Xen

Nice!
u/katkip

Yep
u/aleamb

fucking awesome!

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katkip

remix of d/11139 by u/anotherkitten

function u(t) {

x.fillStyle=`hsl(${t*99} 50%${50+50*S(t*99)}%`;x.arc(960,540,t+S(t**5)*t,3+C(t*99)*3,3+S(t*66)*3);x.fill();x.drawImage(c,-72,-40,2064,1160)

Nov 25 2018 10:33 AM UTC

}// 139/140

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Falling in the #illusion #waitforit stare in the middle for few seconds in fullscreen and see what happens

u/joeytwiddle

Yeah that's ... uh ... powerful!

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pavel

function u(t) {

with(x)for(j=9;--j;)for(i=2<<j,f=6.28/i;i--;fill())for(beginPath(k=2);k--;fillStyle=i%2?'#fff':R())arc(960,540,k*190*j**.5,a=(i+t%2)*f,a+f)

Nov 23 2018 4:55 AM UTC

}// 139/140

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Black and white spinners #beesandbombs

u/katkip

1.5 dimension fidget spinner
u/BackendForth

Looks like a rotary encoder.

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pavel

remix of d/11100 by u/pavel

function u(t) {

for(c.width|=i=18,t%=8,T=t<<1;i--;)x.rect(535+(i?i-1:T)*50,440-!i*200*S(t*Math.PI),i?!~~(T-i+1.5)^i%2?50:0:100,200);x.fill('evenodd')

Nov 21 2018 6:30 PM UTC

}// 134/140

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Evenodd 2 #default

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rnbw

function u(t) {

c.width^=0;x.fillStyle='#5b9';for(j=0;j<12;j++)for(i=0;i<22;i++){x.beginPath(x.fill(x.arc(99*i,99*j,S(t*3+i*3.14+j*3.14)*20+49,0,7)))}

Nov 16 2018 7:32 PM UTC

}// 134/140

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oooooh, circles

u/Xen

Nice
u/sigveseb

cool style

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cantelope

function u(t) {

eval(unescape(escape`景爨昽椽㉥㌬砮瑲慮獬慴攨眽⡣⹷楤瑨簽〩⼲ⰵ㐰⤬砮牯瑡瑥⡓⡴⤩㭩ⴭ㭸⹦楬汒散琨匨瀩⩤⽚⩷Ⱘㄭ瘪瘥㈩⽚⩷ⱳ㴸㔯娯娬猩⥤㴨䴽䵡瑨⤮桹灯琨堽ㄭ⡶㵩⩩⽦⤥㈬娽ㄭ瘪椥㈩ⱚ㴳⸵ⵃ⡰㵍⹡瑡渲⡘ⱚ⤫琩⩤`.replace(/u(..)/g,"$1%")))

Nov 15 2018 12:49 AM UTC

}// 140/140

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pavel

function u(t) {

p=i=>99*[0,0,3-i,1,6-i,2,i-5,i-7][~~i]
for(c.width|=t%=i=8,x.rotate(.8);i--;m+7&7&&x.fillRect(p(m?i:t)+904,p(m?6-i&7:8-t)-460,90,90))m=~~t-i

Nov 10 2018 7:44 AM UTC

}// 140/140

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This really wants to be faster but I'm out of bytes!

Show more comments…
u/jylikangas

This is challenging stuff!
u/Xen

137: p=i=>99*[0,0,3-i,1,6-i,2,i-5,i-7][~~i] for(x.rotate((c.width|=t%=i=8)/9);i--;m+7&7&&x.fillRect(p(m?i:t)+904,p(m?6-i&7:8-t),90,90))m=~~t-i
u/jylikangas

Full speed 138: p=i=>99*[0,0,3-i,1,6-i,2,i-5,i-7][~~i] for(c.width|=i=8,x.rotate(7);i--;m+7&7&&x.fillRect(p(m?i:T=t*5%8)+700,p(m?6-i&7:8-T),90,90))m=~~T-i
u/pavel

Nice! There is some flicker but you saved enough bytes to fix p=i=>99*[0,0,3-i,1,6-i,2,i-5,i-7][~~i];for(c.width|=i=8,x.rotate(7),T=8*t%8;i--;m+7&7&&x.fillRect(p(m?i:T)+450,p(m?6-i&7:8-T),90,90))m=~~T-i
u/jylikangas

This was fun. I also tried two totally different implementations but it seems your approach is the best.
u/katkip

Haha that's fun

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yonatan

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㵩㴵ㄲ㭩ⴭ㭸⹦楬汒散琨㤶〫瀮砪瀮眬㔴〫瀮礪瀮眬瀮眬瀮眩⥰㵮敷⁄位䵡瑲楸⡛⸮⸧㌰〰〳〰〰㌵〰〰❝⤮牯瑡瑥䅸楳䅮杬攨琬琬〬琪㤹⤮瑲慮獦潲浐潩湴⡮敷⁄位偯楮琨椾㸶☷Ⱪ㸾㌦㜬椦㜩⤻`.replace(/u(..)/g,"$1%")))

Nov 8 2018 10:26 AM UTC

}// 140/140

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for(c.width|=i=512;i--;x.fillRect(960+p.x*p.w,540+p.y*p.w,p.w,p.w))p=new DOMMatrix([...'3000030000350000']).rotateAxisAngle(t,t,0,t*99).transformPoint(new DOMPoint(i>>6&7,i>>3&7,i&7));

u/katkip

This is nice
u/iverjo

Cool!
u/katkip

#transpose

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pavel

function u(t) {

for(c.width=640,s=145;s-=5;)for(t+=.05,Q=t%4,i=17;i--;)x.lineTo(320+s*S(A=(2*Q*(Q<1)+i-(i>>2))*1.571),180+5/8*s*(C(A)+1-(i&4)/2));x.stroke()

Nov 8 2018 4:55 AM UTC

}// 140/140

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u/DataMeta

Very cool

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