Dweets awesomed by u/Cloud

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: #Opposites

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farter

function u(t) {

t||(f=s=1);s<<8&f||s>>24&255?(f|=s,s=1<<new Date,f>>24==-1&&(f<<=8)):s<<=8;c.width=63;for(i=32;i--;)(f|s)&1<<i&&x.fillRect((i&7)*8,i&~7,7,7)

Mar 4 2017 11:43 AM UTC

}// 140/140

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u/parabola

Awesome!
u/iverjo

Tetris! Any way we could slow it down?
u/FireFly

Very nice! (i&7)*8 → i%8*8 should save you two bytes, btw
u/farter

@iverjo in fact at first i tried, but if it's slowed down, you'll see some wrong but minor behavior, due to saving bytes. and @FireFly thx, and the two bytes allowed me to solve one of them!
u/Renaud___

I am trying to do anything like that since 4 days ... with 180 char, cant golf it... full respect farter :)
u/joeytwiddle

#game #tribute
u/Cloud

#tetris

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New_Core

function u(t) {

c.width=1920;for(i=16;i--;)x.ellipse(1e3+300*S(t+i*.1),500+50*C(t+i*.1),160*S(-i*.5)+160,50*S(i*.1)+5,1.6+.5*S(t*.5),9.5,0,6.3);x.stroke();

Mar 3 2017 3:31 PM UTC

}// 139/140

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u/sfz

wow creative!
u/sfz

reduced it by about 15 bytes in case you want to try to do something else with the extra room: c.width|=0;for(i=16;i--;)x.ellipse(1e3+300*S(t+i/9),500+50*C(t+i/9),160*S(-i/2)+160,50*S(i/9)+5,1.6+S(t)/2,9,0,7);x.stroke()
u/iverjo

So good!
u/sigveseb

is that a pseudo-3D fish? super nice!
u/donbright

marvellous
u/magna

WAAAAT
u/SpecialAgent

Magnificent depth!
u/joseprio

Really impressive :)
u/Kalanchoe

Amazing!
u/ArtsyBiker1

WHOA
u/gautjac

beautiful
u/21medals

Reduced it ±20 bytes and added beginPath() without changing any values:
u/21medals

for(c.width|=i=16;a=i--/10;x.stroke())x.beginPath(),x.ellipse(1e3+300*S(t+a),500+50*C(t+a),160*S(-i/2)+160,50*S(a)+5,1.6+S(t/2)/2,9.5,0,6.3)
u/New_Core

#fish
u/joeytwiddle

#model
u/Cloud

https://www.dwitter.net/d/17352
u/vain

incredible 3d fish

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SpecialAgent

remix of d/1755 by u/SpecialAgent

function u(t) {

c.width^=0;r=60;for(n=6;n--,q=r*[1,2,3,5,6,9][n],d=t/[1,2,3,4,5,6][n];)x.arc(r*9,r*9,q,1,9),x.stroke(),x.fillRect(r*9+q*C(d),r*9+q*S(d),9,9)

Mar 3 2017 7:50 AM UTC

}// 140/140

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The approximate orbits of the newly discovered Trappist-1 system, three of the seven planets lie in the habitable zone. The innermost planet is not shown here.

u/sfz

I love these space science ones!
u/SpecialAgent

The outermost planet circles the sun around every 20 Earth days, that is a very tight year!
u/donbright

outstanding!

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sawaxon

remix of d/1701 by u/sawaxon

function u(t) {

c.width|=0
for(j=1;j<11;j++)for(i=1;i<20*j;i++)x.fillRect(900+S(t+i/2)*80*j,500+C(t+i)*50*j,4,4)

Mar 1 2017 8:43 PM UTC

}// 96/140

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u/iverjo

Almost looks like 3D :) Making near dots smaller and far dots smaller would enhance the effect

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FireFly

remix of d/1689 by u/FireFly

function u(t) {

for(s='0',i=6;i--;c=s[t*60|0])s=s.replace(/\d/g,i=>['+1-0-1+','-0+1+0-'][i]);c<2?x.translate(18,0,x.fillRect(0,0,18,3)):x.rotate(c+60/57.3)

Mar 1 2017 5:45 PM UTC

}// 139/140

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L-system visualizer. Sierpiński arrowhead curve

u/donbright

brilliant.... any description of how it works?
u/donbright

n/m i see you explain it in 1688, thanks!
u/tomkh

haha... using translate/rotate is a cool hack! reminds me of LOGO turtle
u/FireFly

Hehe, it's handy to offload the job of keeping track of the turtle to the canvas.
u/katkip

#fractal

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Niklas

remix of d/1578 by u/Niklas

function u(t) {

for(c.width|=0,q=80,r=.485,i=q;i--;)for(a=i*r+t,k=12*q+C(a)*q*3,l=7*q+S(a)*S(t)*q*3,j=q;j--;)b=j*r,x.fillRect(k+C(b)*q*C(a),l+S(b)*q,3,3);

Feb 28 2017 10:39 PM UTC

}// 138/140

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Renaud___

function u(t) {

l=c.width+=i=0;h=400;for(;++i<200;)for(j=a=(t+C(i))%2;j++<50;)x.fillRect(l*C(i*i)+~~a*(w=a*h-h)*C(j),(~~a?h:a*h)*(C(i)*C(i)+2)+w*S(j)/4,3,3)

Feb 27 2017 12:09 PM UTC

}// 140/140

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u/HeyJD

This looks amazing. Great job.
u/Renaud___

Thanks :)
u/khalkeus

this is super neat
u/iverjo

Wow!
u/lionleaf

Brilliant!
u/tbroadley

Sweet!
u/donbright

OMG OMG OMG OMG
u/ninerdelta

mind blown
u/sfz

(((does we're not worth bow)))
u/Kalanchoe

That's so beautiful!
u/spbyrne

Incredible
u/Renaud___

wow ... thanks again for all the nice reviews :)
u/punkhaa

mice
u/punkhaa

*nice
u/gormisdomai

I joined this site for this kind of thing
u/lionleaf

On mobile you can tap at different locations for different colors
u/lionleaf

Haha, oops, that comment was for another dweet. This still remains one of my favorites!!
u/sigveseb

golfed to 137: for(l=c.width+=i=0,h=400;++i<200;)for(j=a=(t+C(i))%2;j++<50;)x.fillRect(l*C(i*i)+~~a*(w=a*h-h)*C(j),(~~a?h:a*h)*(C(i)**2+2)+w*S(j)/4,3,3)
u/FireFly

Eternal rains will come… I really like this one, very pretty!
u/zhanglongdream

啊啊啊
u/leonarven

It was really nice to solve the secret of this code! Such simple, but such brilliant! Good job!
u/sb

My favorite
u/arowberry

I love it. Reminds me of my Seattle days.
u/21medals

What does ~~ do? Like in (~~a?h:a*h)
u/Renaud___

It work as a math.floor. actually there is a difference but i dont remember how exactly
u/Renaud___

Dunno what changed in Chrome recently, but now this animation is very very slow :(
u/hollo47

#rain
u/noonat

~ is a bitwise not. It flips all the bits in the number to the opposite. Flipping again (~~) puts the bits back to what they were. It works does something similar to floor because it truncates floats to 32-bit integers as part of the operation. (But unlike floor, ~~-2.1 is -2 instead of -3.)
u/rbong

I did a detailed analysis of this effect in a medium post: https://medium.com/@r.l.bongers/visual-effec…
u/vain

cool raindrop fx

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khalkeus

function u(t) {

c.width^=0;s='Hello World!';x.font="99px Courier";for(i=0;i<13;i++)for(j=1;j<18;j+=9)x.fillText(s.charAt(i),350+i*99,540+C(t*9+i+j)*99)

Feb 27 2017 1:52 AM UTC

}// 135/140

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recursive

function u(t) {

x.beginPath()
x.fillStyle=R(p=t*96+S(t*32)*5,128+p,p)
for(i=0;i<7>t;x.lineTo(r*C(i+=.01)+960,r*S(i)+540))r=S(i*2%3.1)**.4*600*(1-t)
x.fill()

Feb 26 2017 4:37 AM UTC

}// 140/140

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Cloverleaf with wavy gradients. Requires ** operator.

u/donbright

awesome graients
u/donbright

gradients

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tomkh

remix of d/1358 by u/tomkh

function u(t) {

for(q=c.d=c.d||[],k=4e3;k--;)x.fillStyle=R(q[k]=k<80?500*Math.random():.47*(q[k-80]+q[k-79]),0,40,.2),x.fillRect(k%80*24,(45-k/80)*24,24,24)

Feb 25 2017 11:44 PM UTC

}// 140/140

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u/iverjo

Very good!
u/SpecialAgent

Brings back memories :)
u/joeytwiddle

#fire

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