Dweets awesomed by u/ben

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: #ScaryMovies

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sandromiccoli

function u(t) {

x.fillStyle=R(0,0,0,0.2);
for(i=0;i<90;i++){
  x.rotate(137.5);
  x.fillRect(S(t+i)*c.width*1.2, 0, 15+(S(t)+1)/2*15, 15+(C(t+i)+1)/2*15) 
}

Dec 30 2017 9:18 PM UTC

}// 140/140

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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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pepp

function u(t) {

a=x.r||1,g=a*t%255
for(i=0;i<1e3;i++){x.fillRect(6*(a&130816)>>8,6*(a&255),6,6)
l=a&1,a>>=1,a=l?a^73728:a
if(a==1)x.fillStyle=R(g,g,g)}x.r=a

Dec 30 2017 5:51 PM UTC

}// 140/140

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Based on http://fabiensanglard.net/fizzlefade/index.p…

u/joeytwiddle

#algorithm

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Xen

function u(t) {

x.globalCompositeOperation='xor',Y=c.width=99;for(i=2e4;i--;)x.fillRect(i%Y,i/Y,X=S(i-C(t)*Y)-1,X*S(X*t))

Dec 30 2017 4:36 PM UTC

}// 105/140

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u/nic

Damn, lemme adjust the antenna... :)

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kchplr

function u(t) {

for(w=i=930;i--;T=t+i,G=1+S(t)/25,R=(f,m)=>f(T)*250+f(T*4.25)*200*m,x.fillRect(w+R(C,1)*G,530+R(S,-1)*G*.9,4,4))x.fillRect(1e3+T,w+T*7,28,9)

Dec 30 2017 11:20 AM UTC

}// 140/140

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u/sigveseb

Nice one

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Xen

remix of d/4721 by u/Xen

function u(t) {

x.strokeRect(3,4,W=1912,H=1072)
x.drawImage(c,4,4,W,H)
x.strokeStyle=`hsl(${t*H/9},99%,50%)`
x.rotate(C(t)/1e4)

Dec 29 2017 8:17 PM UTC

}// 111/140

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Version2: the hippy summoner!

u/iverjo

#trippy
u/Cloud

Retro style

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E-Mouse

function u(t) {

c.width|=0;for(i=32;i--;)x.fillRect(i*60,0,(Math.round(t).toString(2).padStart(32,0).charAt(i)==1)?50:0,1e3)

Dec 29 2017 6:09 PM UTC

}// 108/140

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Binary second counter!

u/BuRRak

Cool

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nickd3000

function u(t) {

for(w=250,i=0;i<w;i++)a=25*i+3*t,r=6*i+S(5*a)*w,q=r/w+t,x.fillStyle=R(S(.25*q)*w,C(.28*q)*w,C(q)*w),x.fillRect(960+S(a)*r,540+C(a)*r,35,35);

Dec 29 2017 5:54 PM UTC

}// 140/140

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mnt

remix of d/3030 by u/New_Core

function u(t) {

x.globalAlpha=.2;for(x.fillRect(0,0,2e3,2e3),W=j=980;--j;x.clearRect(W+S(p=t+j-5.3*V)/Z*W-Z*-9,540+C(p)/Z*W,s=60/Z,s))Z=j%18-t*5+(V=t*6|0)

Dec 29 2017 5:14 PM UTC

}// 138/140

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tunnel slowly fades away

u/katkip

#tunnel

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