Dweets awesomed by u/rikardlindstrom

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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nystrand

function u(t) {

with(x)for(q=t?5e3:translate(1e3,b=540),i=b*t%q;i>0;fillRect(c=i/5-q/2,c,T(t&i/t^b)*b+q,q),q=.2)fillStyle=R(a=i--/9-q,rotate(b*t&i),a+b,.1)

May 25 2017 10:00 PM UTC

}// 139/140

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u/magna

Super cool!
u/lionleaf

Amazing!
u/MrM@_S

disco

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nystrand

remix of d/2727 by u/joeytwiddle

function u(t) {

c.width|=p=(X,Y=X,S=X,D=15,r=_=>C(t+=S++),k=_=>p(X+S*r(),Y+S*r()/3,S*.8,D-1))=>D&&x.fillRect(X,Y,S,S,x.fillStyle=R(k(),k(),S*D,.01));p(580)

May 16 2017 12:19 PM UTC

}// 139/140

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u/yonatan

#clouds

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nystrand

remix of d/2727 by u/joeytwiddle

function u(t) {

c.width|=p=(X,Y=X,S=X,D=16,r=_=>C(t+=S*D+t/8e6),k=_=>p(X+S*r(),Y+S*r()/3,S*.8,D-1))=>D&&x.fillRect(X,Y,S,S,x.globalAlpha=.01)&k()&k();p(580)

May 16 2017 10:12 AM UTC

}// 140/140

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u/joeytwiddle

Thank you for this :)
u/magna

WOW
u/donbright

damn
u/joeytwiddle

I learned 5 different tricks from your golfing here!
u/iverjo

#clouds
u/jdspugh

Amazing!

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nystrand

function u(t) {

for(q=a=b=i=3e3,d=35;i--;x.fillRect(a/2-q,b/4-q,q*9,q*4,x.fillStyle=R(d*3,d,d%99,.1,q=2)))a+=a*S(w=d+S(d*9+t*4))/77,b+=b*C(w+.5)/77,d+=t%9/d

May 12 2017 2:39 PM UTC

}// 140/140

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u/donbright

outstanding
u/magna

This is so 70's!
u/lionleaf

sweet!
u/iverjo

So nice! And it looks like 3D
u/joeytwiddle

Pretty
u/13thptr

#flower

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nystrand

remix of d/2564 by u/nystrand

function u(t) {

for(l=c.width|=a=C(t);l--;x.fillRect((k-a*i-a*j*S(t)+6)*z*9,(i+j*S(t)+a*k+4)*z*9,z-9,z*i^5))i=a*S(l),k=3+C(l),j=S(p=l/98)*k,k*=C(p),z=17-a*j

Apr 24 2017 6:35 PM UTC

}// 140/140

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u/donbright

these blow my mind
u/iverjo

#torus

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nystrand

remix of d/1968 by u/nystrand

function u(t) {

for(l=c.width|=a=C(t),b=S(t);l--;x.fillText(i*z^39,(k-a*i-b*a*j)*z+899,(i+b*j+a*k)*z+500))i=a*S(l),k=3+C(l),j=S(p=l/79)*k,k*=C(p),z=99-a*j*9

Apr 23 2017 5:49 PM UTC

}// 140/140

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u/donbright

best dwitter torus?
u/sigveseb

nice!
u/keithclark

Why not use x.fillRect((k-a*i-b*a*j)*z+899,(i+b*j+a*k)*z+500,6,6)? it renders faster and is smaller
u/mxfh

Print and connect the dots. Or do it on screen for lasting impact.

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nystrand

function u(t) {

p=t?(c.width|=n=960,p.push([7,n*S(t)]),p.map(([a,b,d=0,e=b])=>[f=a+a-d,g=b+b-e,f>n?f+6:a,f>0&g<0?g+g:b+.3,x.fillRect(500+a,n-b,22,22)])):[]

Mar 28 2017 4:58 PM UTC

}// 139/140

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u/donbright

excellent
u/katkip

#physics

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nystrand

function u(t) {

for(l=c.width=512,a=C(t),b=S(t);l--;x.fillRect((k-a*a*i-b*a*j+b/a)*z+300,(a*i+b*j+a*k)*z+99,d=.2*z/a,d))i=l>>6,j=l>>3&7,k=l%8-4,z=20+b*i-a*j

Mar 8 2017 6:20 PM UTC

}// 140/140

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u/sigveseb

This is good
u/FireFly

Woah, very nice!
u/p01

Ace!
u/donbright

cool 3d
u/Lazy1337

#d3
u/Lazy1337

#cube

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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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Show more comments…
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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Renaud___

function u(t) {

r=Math.random;f=g=>Math.floor(256*r());x.fillStyle=R(f(),f(),f(),0.008);for(i=0;i<99;i++)x.fillRect(2220*r()-300,1380*r()-300,600,600);

Feb 24 2017 11:35 AM UTC

}// 135/140

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u/5Mixer

Woah, this is awesome. I've got no idea how it works but it's making a dope picture :D
u/Renaud___

Its only chain of random position square with very very low opacity and random color :]
u/sfz

I'm just... I'm... speechless.

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