Dweets awesomed by u/danny@hille.dk

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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Xen

function u(t) {

c.style.filter=`blur(9px)contrast(3)invert(.9)`
for(c.width|=i=99;i--;)x.fillRect(1e3+C(t*i)*1e3,540+S(t*t+i)*499,i+T(i),i)

Jan 28 2021 1:58 PM UTC

}// 123/140

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just a test

u/danny@hille.dk

It's a blizzard
u/rep_movsd

Try slowing it down with t/=99 and see

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erin

remix of d/21440 by u/erin

function u(t) {

c.width=w=70;for(i=2800;i--;)x.fillRect(X=i%w,Y=i/w,X/9+1*(Y/6.5)+S(X/7-5*t),1),x.fillStyle=`hsla(${U=i/13+S(t+i)*4+w},30%,50%,${T(U)+.5})`

Jan 27 2021 9:20 PM UTC

}// 139/140

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this is supposed to be water in the sun, but i couldn't figure out how to make the color blue instead of rainbow without ruining the shine.. any ideas?

u/danny@hille.dk

c.width=w=70;for(i=2800;i--;)x.fillRect(X=i%w,Y=i/w,X/9+1*(Y/7)+S(X/7-5*t),1),x.fillStyle=hsl(${U=191+i/55+S(t*9+i)*4},60%,40%,${T(U)+.5}
u/danny@hille.dk

You can do it the lazy way, by simply adjusting the number range to lay within a single color hue, and shifting it towards the blue hue, blue is around 165 (light greenish blue) to 260(purplish blue)
u/danny@hille.dk

But i actually like the rainbow water better :-)
u/erin

lol thanks! :)

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jdidion

function u(t) {

c.width=900
for(i=0;i<90;i++)
x.font="75px'",x.fillStyle=`hsl(${t*i*29},30%,10%`,
x.fillText("/\\".repeat(90),-100+C(t*2+i/20)*45,i*15)

Jan 26 2021 7:26 PM UTC

}// 135/140

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u/Xen

does look nice
u/DataMeta

cool #opticalillusion

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danny@hille.dk

remix of d/21456 by u/rodrigo.siqueira

function u(t) {

f=(X,Y,n=98)=>Y*Y>n?n:f(4*X*Y-.61,Y*Y*3-X*X,n+1)
for(m=i=1080;i--;x.fillRect(i*2,t*60,2,1))x.fillStyle=R(0,K=f(i/(m*19-t),t/m),K*K,S(K/9))

Jan 26 2021 6:44 PM UTC

}// 138/140

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blue zap remix

u/Xen

nicely done
u/danny@hille.dk

#fractal

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Xen

remix of d/17628 by u/Cloud

function u(t) {

c.style.filter=`blur(19px)contrast(3)`
for(c.width|=i=1e3;i--;x.fillStyle=R(i*t%z^i,i*t%z,i))x.fillRect(1e3+1e3*S(t*i),1e3*C(t**i),z=199,z)

Jan 26 2021 5:52 PM UTC

}// 139/140

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Early Universe 1

u/danny@hille.dk

...that escalated quickly - loving it!
u/Xen

was a rather large expansion almost instantly :-O

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rodrigo.siqueira

remix of d/21453 by u/rodrigo.siqueira

function u(t) {

for(i=2e3,f=(X,Y,n=99)=>T(X-S(Y))<9?f(X*X-Y*Y,2*X*Y+.7,n-1):x.fillStyle=`hsl(${i/8},80%,${C(n)*n}%`;i--;x.fillRect(i,t*60,1,1))f(i/3e3,t/50)

Jan 26 2021 4:11 PM UTC

}// 140/140

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Shaky lines #fractal

Show more comments…
u/danny@hille.dk

Love it!! reminds me of a Salvador Dali painting
u/aaaaaz

crazy !
u/DataMeta

woww this is beautiful!
u/DataMeta

my new lock screen wallpaper :) #abstract #art
u/rodrigo.siqueira

I created an animated version here: https://www.shadertoy.com/view/wtGcWc it's super fast and hypnotic. View in full screen!
u/danny@hille.dk

I just saw your "Super Julia Fractal" on shadertoy it is very cool!

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Qwitter

function u(t) {

x.fillStyle="#9351";x.fillRect(0,0,m=2e3,m);T=5.495;f=1+(t%(2*T)>T)^0;D=640;A=D/(1+(t%T)**3);x.clearRect(f*D+A*C(4*t),540+A*S(4*t),25,25);

Jan 26 2021 3:06 PM UTC

}// 138/140

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Exchanging Centers

u/smtsjhr

FILL then CLEAR instead of CLEAR then FILL! thats so neat! i never thought that and find it kinda *ZEN* in philosophy idk
u/Qwitter

Agreed @smtsjhr, I picked this technique up from post d/6548 by u/41407 and employ it frequently.

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erin

remix of d/21439 by u/erin

function u(t) {

c.width=w=70;for(i=2800;i--;)x.fillRect(X=i%w,Y=i/w,X/15+1*C(Y/6.5)+C(X/7-5*t),1),x.fillStyle=`hsla(${U=i/9+S(t+i)*9},5%,50%,${C(U+i)+1})`

Jan 25 2021 2:15 AM UTC

}// 138/140

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Pulsar v2

u/andrea270872

very cool. It makes me thing of some retro tv intro, like from Dr Who! Great

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Pascal

remix of d/21403 by u/danny@hille.dk

function u(t) {

c.width=w=70;for(i=2800;i--;)x.fillRect(X=i%w,Y=(i-X)/w,0<T(T(S(X/7+5*C(t))+S(Y/7-5*t))),1)

Jan 24 2021 2:39 PM UTC

}// 91/140

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noisy donuts

u/danny@hille.dk

Mmmmm donuts
u/Xen

nicely done

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Pascal

function u(t) {

for(j=4;j--&&t<2;)for(i=1080;i--;x.fillRect(a=t*240+j*480,i,8,f(a/2400-.4,i/2400-.225)**2))f=(X,Y,n=80)=>Y<n?f(X*X-Y*Y-.3,2*X*Y+.7,--n):n/80

Jan 24 2021 2:02 PM UTC

}// 140/140

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fast flowers

u/Qwitter

I like the 4 panel display!
u/danny@hille.dk

lovely presentation

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