Dweets awesomed by u/Zolden

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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p01

function u(t) {

for(c.width=n=128;n-=r=i=1/64;x.fillRect(n%2*64,n/2,k/32,1))for(Y=1-n*i,X=n%2-1,k=32;--k/r;i=j)j=2*r*i+X*S(t)-Y*C(t),r=r*r-i*i+Y*S(t)+X*C(t)

Jan 3 2018 9:41 PM UTC

}// 140/140

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Spinning Mandelbrot set

u/magna

We're going to need a bigger CPU.
u/iverjo

Nice effect! 22 FPS on my machine, in Firefox. Surprisingly, it runs much slower in Chrome and Edge (4 FPS)
u/sigveseb

Screeching by at 4FPS on my machine too :D nice mandelbrot though
u/donbright

feel like standing up and applauding. unbelievable.
u/rodrigo.siqueira

#mandelbrot #fractal

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veubeke

function u(t) {

t*60&127?0:T=[0,L=.001]
S=[c.width^=0]
T.map((_,i)=>S[i*2-1]=(_+T[i-1])/2+(Math.random(x.fillRect(i,540-_,2,S[i*2]=_))-.5)/L)
T=L<2?S:T
L*=2

Jan 3 2018 8:09 PM UTC

}// 140/140

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Simple terrain generation using midpoint displacement

u/iverjo

Nice alternative to perlin noise!
u/sigveseb

Very nice! And with the horizontal flat line we can pretend that is the sea level; everything above is a mountain and everything below is the sea :)
u/iverjo

#random

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eviltoad

remix of d/5381 by u/eviltoad

function u(t) {

c.width=1920;
for(i=0;i<1920*4;i++){
  x.fillStyle=R(i*C(t),i*S(i),S(t)+T(t));
  x.fillRect(i/4,550+S(t/4+i)*100*i*(t%4)/300,25,25)}

Jan 3 2018 5:51 PM UTC

}// 132/140

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ellisk1

remix of d/5056 by u/ellisk1

function u(t) {

x.fillRect(0,0,q=c.width=2e3,q);for(i=q;i--;)r=99+i**4/7e7/t,x.fillStyle="#fff",x.fillRect(1e3+C(z=i%q*i+3e2*t/r)*r,1e3+S(z)*r-i,8+6*S(z),5)

Jan 3 2018 3:46 PM UTC

}// 140/140

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A little remix of my black hole dweet

u/RomanW

Really fantastic!
u/iverjo

Nice 3D effect!
u/M1T0

very impressive
u/lionleaf

#tunnel #black_hole #tornado
u/vain

Looks so great!

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crimbles

remix of d/5357 by u/crimbles

function u(t) {

for(i=50;i<340;i++){
if(i%2){x.fillStyle='#000';x.rotate(.01)}else{x.fillStyle='#fff';x.rotate(.9)}
x.fillRect(t,i*5,T(i)*10,T(t))}

Jan 3 2018 12:04 PM UTC

}// 131/140

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u/magna

I'd print this and hang it as modern art.
u/joeytwiddle

I'd print this and sell it to magna at the going rate.
u/iverjo

This dweet has attitude and style! I like it

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crimbles

remix of d/4816 by u/travisdoesmath

function u(t) {

for(i=0;i<400;i+=3){x.fillStyle=R(-S(i)*255,C(i)*255,S(i)*255);x.beginPath(),x.fill(x.arc(960-i/9*C(i+t)*70,540+i/9*S(i+t)*40,i+20,0,6.24))}

Jan 3 2018 10:02 AM UTC

}// 140/140

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u/magna

Pretty!

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jonathan_b

remix of d/5339 by u/jonathan_b

function u(t) {

for(c.width|=s=i=980,q=S(t/24)/12;--i;)x.fillStyle=R(r=s*1.2*T(q),s/i,i,k=C(i+q*40+t)+1),x.fillRect(s+.5*C(i)*s*C(q*r*k),s/2+s/2*S(i),25,80)

Jan 3 2018 7:33 AM UTC

}// 140/140

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u/magna

Wow. I wasn't expecting for that to start happening.
u/iverjo

It's dancing!
u/jonathan_b

:)

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0utdacious

function u(t) {

for(!t?f=q=z=r=i="3":x.fillRect(a+=i=(d=q[z++]-2)*r,b+=r=-d*y,6,6);y=i,f++<17;b=a=500)q+=z+[...q].reverse().map(w=>~w+5).join('')

Jan 3 2018 6:42 AM UTC

}// 129/140

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Dragon Curve Fractal

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Zolden

function u(t) {

c.width|=0;for(k=0;k++<1999;){j=k%20;q=j*j;
i=k/20;p=255-q*j/30;x.fillStyle=R(p,p,p,1);x.fillRect((q+75)*i-q*(t+8)*3,q*2,q/2,j*40)}

Jan 2 2018 11:29 PM UTC

}// 131/140

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Xen

remix of d/3167 by u/Xen

function u(t) {

for(i=c.width|=0;i--;x.fillRect(960+S(p=.9*i+S(t)*3e3/i*S(t))*(d=i*i/1e3)-i*C(t),540+C(p)*d-i*S(t),s,s))x.fillStyle=R(Z=t*i%255,s=i/5,255-Z)

Jan 2 2018 9:31 PM UTC

}// 140/140

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Show more comments…
u/jbl

WOW! 💯
u/lionleaf

Testing new links u/Xen
u/Xen

Yay! d/5309
u/donbright

i would have said this was impossible if i didnt see it
u/lionleaf

#alien #needle #color #floppy #rotation
u/sybarita

Yo what ... this is amazing
u/mrperson59

Is this what sleeping beauty pricked her finger on?

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