Dweets awesomed by u/Tekmap

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: #Food

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rodrigo.siqueira

remix of d/17516 by u/rodrigo.siqueira

function u(t) {

x.fillRect(0,0,2e3,2e3)
for(Y=i=-11;i<11;i=i+.005)
X=S(i/5-t+Y/9)+i,Y=15*S(i/6+Y/6-1),Z=S(i/2+t*2)*8,
x.clearRect(980+75*X,540+Z*8+Y*20,2,5)

Jan 4 2021 9:42 PM UTC

}// 140/140

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Bifurcation waves #bifurcation

u/Qwitter

quad map flaps

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tomxor

remix of d/21114 by u/magna

function u(t) {

for(c.width&=i=8320;i--;)
x.fillRect(X=i&127,Y=i>>7,1,Y/4-8>T(T(S(X/4)*S(Y/4+t*4))))

Jan 3 2021 11:45 AM UTC

}// 84/140

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Smolr

u/DataMeta

bravo
u/magna

83, if you roll the second line up

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pavel

remix of d/21012 by u/pavel

function u(t) {

with(x)for(c.width|=i=710;i--;beginPath(fill(ellipse(40+18*C(a=++t%3.1416),0,w=S(a),!rotate(i*49+w/3),a,0,7))))setTransform(9,0,0,9,960,540)

Dec 17 2020 3:03 AM UTC

}// 140/140

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Torus Study #2

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intrinsic

remix of d/20935 by u/rodrigo.siqueira

function u(t) {

for(ⵠ=1e4,ഽ=(β,α,γ,ට)=>γ>1?ഽ(α+γ*S(ට),β+γ*C(ට),γ/3,T(ට/11)*23):x.fillRect(β+960,α+540,γ,γ);ⵠ--;)ഽ(0,0,360,ⵠ+t)

Dec 15 2020 8:24 PM UTC

}// 110/140

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7 bytes less #golf

u/pavel

Shaving off 8 more for(f=(X,Y,r,a)=>r>1?f(Y+r*S(a),X+r*C(a),r/3,T(a/11)*23):x.fillRect(X,Y,r,r);t<1e4;)f(960,540,360,++t)
u/intrinsic

Awesome!
u/Xen

for(f=(X,Y,r,a)=>r>1?f(Y+r*S(a),X+r*C(a),r/3,T(a/9)*23):x.fillRect(X,Y,r,r);t<1e4;)f(960,540,360,++t)

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rodrigo.siqueira

remix of d/20959 by u/jellyedwards

function u(t) {

c.style.filter=`invert(`
for(e=k=c.width|=w=50;k--;x.fillRect(w|x.rotate(k%w+t/4),9,1,1))
x.setTransform(v=2+k%7,0,0,v,k,(k*k+t*v)*w%e-w*8)

Dec 15 2020 6:23 PM UTC

}// 139/140

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Night snow #snowflake

u/Xen

smooth!
u/pavel

Nice. Here's 126, maybe room for snowflake code with(x)for(fillRect(0,0,i=2e3,i);i--;)clearRect(50,9,!setTransform(s=2+i%7,0,0,s,i,i&&(i*i+t*s)*50%2e3-400),i&&!rotate(i+t/4))

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New_Core

remix of d/20988 by u/New_Core

function u(t) {

for(c.width|=f=i=540;i--;x.fillRect(f/2*S(v=i/f*3)*S(w=t+i*19),f/6-i,A=7*S(v)*C(w)+8,A))x.setTransform(a=C(d=S(t)),b=S(d),b,-a,960-d*f,a*f)

Dec 14 2020 11:51 PM UTC

}// 139/140

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a swinging christmas ball

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𮀮𩡩𫁬𤡥𨱴𚀰𛀰𛁩🐱𩐴𛁩𚐬𮀮𬱴𬡯𪱥𤱴𮑬𩐽𙱳𫡯𭰧𞱩𛐭𞱩𙐱𜡼𯁸𛡢𩑧𪑮𤁡𭁨𚁸𛡳𭁲𫱫𩐨𚐩𚑸𛡬𪑮𩑔𫰨𞐶𜀫𚁓𚁰👩𛰲𚐯𚁚🐨𪠽𬀯𝡼𜀩𙐷𛰸𜀰𚐪𚁬👩𙐲𛰵𩐳𚐫𚁪𛰳𜀫𤰨𭀯𝠩𚠹𚐥𜐴𛐷𚐯𦠬𝐴𜀫𚀨𪠪𚠳𛠱𚱴𚐥𞀭𝀫𠰨𬀩𛱚𚡬𚐯𦠩`.replace(/u../g,'')))

Dec 7 2020 8:01 PM UTC

}// 140/140

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danny@hille.dk

remix of d/20901 by u/pavel

function u(t) {

x.fillRect(0,0,i=c.width|=0,i)
for(m=120;i--;x.clearRect(666+(p>>2)*200+m*C(a=(p&1|-1)*28.4*d-4*t),240+p%4*200+m*S(a),d,d))d=i%m/18,p=i/m|0

Dec 5 2020 1:14 PM UTC

}// 139/140

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broken remix

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pavel

remix of d/20901 by u/pavel

function u(t) {

for(i=c.width|=p=g=>(g(0)?k&3:k/4)*200+130*g(.8+(~~k+k/4&1||-1)*(i%120*41/13+5*t));k=--i/120;)x.fillRect(560+p(S),240+p(C),9,9)

Dec 4 2020 9:12 PM UTC

}// 127/140

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Moving #illusion

u/pavel

Discovered this randomly when golfing the original. Not sure why it happens.
u/danny@hille.dk

cool effect: the "feature" is caused by not truncating k=--i/120 -> k=--i/120|0 disables this feature :-)
u/KilledByAPixel

👍
u/danny@hille.dk

better solution: for(i=c.width|=p=g=>(g(0)?k&3:~~k/4)*200+150*g((k&1||-1)*(i%120*41/13+5*t));k=--i/120;)x.fillRect(560+p(S),240+p(C),9,9)

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pavel

function u(t) {

for(i=c.width|=0;i--;x.fillRect(660+(p>>2)*200+130*C(a=Math.PI/4+(p+p/4&1||-1)*(369/13*d+3*t)),240+p%4*200+130*S(a),d,d))d=i%120/9,p=i/120|0

Dec 1 2020 8:51 PM UTC

}// 140/140

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#beesandbombs demake https://twitter.com/beesandbombs/status/1327…

u/rep_movsd

If you stare a bit, you see white lines completing the circles - an optical illusion
u/danny@hille.dk

save 9 bytes for(i=c.width|=0;i--;x.fillRect(660+(p>>2)*200+130*C(a=.8+(p+p/4&1||-1)*(28.4*d+3*t)),240+p%4*200+130*S(a),d,d))p=i/120|0,d=i%120/9
u/danny@hille.dk

120/9 = 40/3
u/danny@hille.dk

129 bytes -> for(m=120,i=c.width|=0;i--;x.fillRect(660+(p>>2)*200+m*C(a=.8+(p+p/4&1||-1)*(28.4*d+3*t)),240+p%4*200+m*S(a),d,d))d=i%m/9,p=i/m|0

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