Dweets awesomed by u/barrebas

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: #Opposites

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logomach

function u(t) {

c.width=2e3;for(i=20;i--;){for(j=10;j--;)x.fillStyle=R(i*20,j*25,10),x.fillRect(960+S(t-i-j*.05)*400,540+S(t+i-j*.05)*200,10,10)}

Dec 31 2017 7:30 AM UTC

}// 129/140

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u/Bugsy

Can remove the brackets from the first “for” and save 2 characters
u/Bugsy

Can also replace the “*.05”s with “/20” to save 2 more

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rikardlindstrom

function u(t) {

t||x.translate(980,540)
c.style.background=R(x.fillStyle='#fff',++t<4&&x.drawImage(c,~x.fillText(0,~x.scale(s=1+C(t)/20,s),0),~x.rotate(t)))

Dec 31 2017 7:03 AM UTC

}// 140/140

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Show more comments…
u/Flopster

Wow! Too bad it doesn't reset, but this looks incredible!
u/rikardlindstrom

Thanks! All I could fit in 140 characters. Happy to hear suggestions how to squeeze it further though!
u/magna

Amazing!
u/iverjo

Kudos
u/sigveseb

So pretty!
u/tqdwqwd

qwd
u/meesh

Wow!
u/iverjo

#galaxy
u/lionleaf

#space #stars

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doof

remix of d/3899 by u/doof

function u(t) {

c.width^=0
x.beginPath(x.translate(960,540))
for(i=t/Math.PI/2;i-->-1;x.rotate(t),x.arc(S(t)*200,0,300,0,7))x.lineTo(0,0);
x.fill('evenodd')

Dec 31 2017 6:52 AM UTC

}// 140/140

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finally got what i originally wanted d/3899 to be -- the lineTo(0,0) takes care of the evenodd artifacts, and the addition of more circles is timed with the contractions. i'll stop with the circles now, i promise. :P

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ben

remix of d/4348 by u/lowpoly

function u(t) {

c.width^=0
x.globalCompositeOperation='xor'
for(p=2e3;p--;)d=p/300+1,x.fillRect(-99+(p+99*(t+5E4)*d)%2E3,(""+p*S(p)/9).substr(5,3)*2,d*=d,d)

Dec 30 2017 9:06 PM UTC

}// 140/140

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u/sigveseb

Tasteful use of xor!
u/New_Core

same effect can be done shorter with x.rect and x.fill('evenodd')

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Pjaerr

function u(t) {

c.style.background=R();x.fillStyle=R(...[S,C,T].map(_=>127*(_(t)+1)));a=137.5*frame;r=8*frame**.5;x.fillRect(r*C(a)+960,r*S(a)+540,8,8)

Dec 30 2017 7:50 PM UTC

}// 135/140

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A little bit of Phyllotaxis. http://algorithmicbotany.org/papers/abop/abo…

Show more comments…
u/Pjaerr

btw, changing the angle a from 137.5 to 137.3 or 137.6 produce different, albeit nice, patterns.
u/Bendoman

Second best thing on here by far.
u/dubistdu

WOW
u/trupples

Also.. shouldn't it be 137.5 * pi / 180 ~~ 2.39982772149 as the trigonometric functions take in radians?
u/trupples

137.5 also kind of "isolates" the spirals after a short while while 2.4 does not
u/Pjaerr

Yeah, that'll be it actually. I still thought it looked decent!
u/DiamondDrake

I was just working on a Phyllotaxis dweet, though i was trying to use ellipse that just needs way too many characters
u/@no_identd

Although the point about radians is fully correct, I'd like to point out that the most accurate IEEE single float approximation of this angle in degrees is 137.50777 (which internally becomes 137.5077667236328125)
u/lionleaf

#spiral #flower #plant #botany
u/fujimotos

This is amazingly beautiful.

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breakster

remix of d/2777 by u/nystrand

function u(t) {

q=t?5e3:x.translate(960,540)
p=S(T(t/3.3))*q
with(x)for(x.width|=i=99;i--;rotate(r=T(t)),fillRect(r*i,p,4+q,1e3),q=0.2)fillStyle=R(q,p,0,.1)

Dec 30 2017 5:06 PM UTC

}// 140/140

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barrebas

function u(t) {

c.width|=d=1e3;for(i=x.lineWidth=z=20;--i;){f=C(t);x.strokeStyle=R(f*i*z,f*i,0);x.beginPath();x.arc(d,d/2,d/2-i*z,f-i*.3,f**2*5);x.stroke()}

Dec 30 2017 11:42 AM UTC

}// 140/140

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breakster

function u(t) {

w=1920;for(i=0;i<w;i++){
x.fillStyle=R(150*S(t/2)*S(t/2),90*S(i/3*T(t)),100+93*S(t/5),0.05)
x.fillRect(i,T(t),1,w-T(t/5))
}

Dec 30 2017 10:51 AM UTC

}// 123/140

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barrebas

function u(t) {

c.width|=0;x.fillStyle=R(S(t)*255,0,C(t)*255,S(t)**2+.5);for(i=1e2;i--;)x.fillRect(960+S(t+i*2)*500,540+C(t+i*t/500)*500,i/4,i/2)

Dec 30 2017 10:33 AM UTC

}// 129/140

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u/breakster

Enchanting!

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travisdoesmath

remix of d/4815 by u/travisdoesmath

function u(t) {

for(i=0;i<300;i++){x.fillStyle=R((i)%255,(i)%255,(i+20*t)%255);x.beginPath(),x.arc(960-i/9*S(i+t)*30,540+i/9*C(i+t)*30,i/2,0,6.28);x.fill()}

Dec 30 2017 6:01 AM UTC

}// 140/140

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u/crimbles

Remixed https://www.dwitter.net/d/5358

dwitter.net | barrebas (1219)