Dweets awesomed by u/stellartux

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: #ScaryMovies

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katkip

remix of d/12197 by u/katkip

function u(t) {

c.width*=1
for(i=9;i--;)for(j=50;j--;)for(k=20;k--;)x.fillRect(400+i*100+S(t*5)*300+j+S(k+t)*S(t*5)*99,400+C(j+i*22)*S(t*5)*29+k*10,2,15)

Feb 6 2019 9:07 AM UTC

}// 137/140

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#default but shuttered

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Xen

remix of d/12172 by u/robbyg

function u(t) {

for(Z=99,i=9;i--;)for(v=200;v--;x.fillRect(520+S(t+v/Z)*400+i*Z,v*5,Z*v/Z,5))x.fillStyle=`hsla(${i*Z+v+t*Z},50%,50%,.1`

Feb 5 2019 4:45 PM UTC

}// 119/140

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u/katkip

#color

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robbyg

remix of d/12170 by u/robbyg

function u(t) {

c.width|=0
for(i=9;i--;)for(v=200;v--;)x.fillStyle=`hsl(${i*40+v+t*40},50%,50%`,x.fillRect(520+S(t+v/50)*400+i*100,440+v,50*v/150,1)

Feb 5 2019 3:47 PM UTC

}// 132/140

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Rainbow weaving perspective #default that is hopefully not derivative. :D

u/DataMeta

Smoooth
u/DataMeta

#colors

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f8f82804

remix of d/12142 by u/f8f82804

function u(t) {

with(x)t||fillRect(t,t,a=5e3,a),setTransform(9,0,0,9,960,540),rotate(w=t&&w<a?w+2.4:1),fillStyle=`hsl(${t}rad 95% 50%`,fillRect(w**.5,0,2,2)

Feb 4 2019 7:57 PM UTC

}// 140/140

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#rainbow #phyllotaxis with #squares -- thanks to u/pavel

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f8f82804

remix of d/12080 by u/stellartux

function u(t) {

with(x)setTransform(u=30*C(w=t&&w<469?w+2.4:1),v=30*S(w),-v,u,960,540),beginPath(),fillStyle=`hsl(${t}rad 95%50%`,fill(arc(w**.5,0,1.2,0,7))

Feb 4 2019 5:33 PM UTC

}// 140/140

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#rainbow #phyllotaxis

u/f8f82804

I'd wanted to do this without any trig, using rotate() and save()/restore(), but it was about 4 bytes too long.
u/pavel

135 with(x)setTransform(30,0,0,30,960,540),rotate(w=t&&w<469?w+2.4:1),beginPath(fillStyle=hsl(${t}rad 95% 50%),fill(arc(w**.5,0,1.2,0,7))

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23_Skidoo

remix of d/12118 by u/23_Skidoo

function u(t) {

t/=s=99
for(i=2e3;i--;x.fillStyle=R(s+T(i-t*s)*s,s+S(t+i)*s,s+S(i*9.1+t)*30,.06))x.fillRect(1E3*(C(t*9+i*3)+.94),625*(C(t*7-i*8.4)+.8),19,s)

Feb 3 2019 3:59 AM UTC

}// 140/140

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u/DataMeta

Nice style! #kaleidoscope

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stellartux

function u(t) {

with(x)t?(r=++n**.5,a=n*2.4,fillStyle=`hsl(${a},99%,50%)`,beginPath(),arc(34*r*C(a),34*r*S(a),25,0,7),fill()):(n=0,translate(960,540))

Feb 1 2019 5:30 PM UTC

}// 134/140

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#rainbow #phyllotaxis

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23_Skidoo

remix of d/12061 by u/23_Skidoo

function u(t) {

t/=30
for(i=2e3;i--;x.fillStyle=R(180+C(-t*5/4)*60,90+S(i*9.1+t)*90,30,.028))x.fillRect(1200*(C(t*9+i*3.2)+.8),700*(C(t*13-i*.7)+.8),s=50,s)

Feb 1 2019 9:00 AM UTC

}// 140/140

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katkip

remix of d/11978 by u/katkip

function u(t) {

c.width*=1;for(i=900;i--;)k=S(t+i)*t-i,l=500-C(i+C(i*t/9999)/9)*500,x.fillRect(960+C(k)*l,540+S(k)*l,10,10)

Jan 28 2019 12:53 PM UTC

}// 107/140

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Weird hypocycloids

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stellartux

remix of d/11975 by u/stellartux

function u(t) {

c.width=w=1920;x.scale(.5,.3);for(i=v=88.11;i<w;i+=v)for(j=v;j<w;j+=v){x.fillStyle=`#${i*839+j}`;x.fillRect(w+C(q=i+t)*j,w+T(q)*i,v,v+S(t))}

Jan 28 2019 3:41 AM UTC

}// 140/140

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