Dweets awesomed by u/username

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: #Food

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veubeke

function u(t) {

for(i=1920;a=i--/400;x.fillRect(i,400+t*70+_*15,1,99))_=C(a+t)*3+C(a-t)*8+(r=i*i/t%1),
x.fillStyle=`hsl(${140-t*4+_},80%,${40-t*2-_-r*9}%)`

Mar 5 2017 5:05 PM UTC

}// 140/140

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Show more comments…
u/iverjo

Nice :) This reminds me of the classic Windows XP desktop background image
u/sigveseb

very nice! can we squeeze in a blue sky?
u/veubeke

I’m trying ^^
u/magna

Not enough Unicode cows. Back to work!
u/Beginner

Amazing!
u/FENRIR

windows xp start up sound went to my head
u/iverjo

#grass
u/joeytwiddle

#landscape
u/vain

Cool and interested way to draw this landscape!

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FireFly

function u(t) {

for(c.width|=M=Math,i=2e4;i--;x.fillRect(A*8,B*8,W=9+M.atan2(M.sqrt(1-X*X-Y*Y),X)*3-t*4&7^4-M.asin(Y)*3,W))X=(A=i%135)/67-1,Y=(B=i/135)/67-1

Mar 4 2017 6:26 PM UTC

}// 140/140

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Raycasted rotating sphere with UV-mapping!

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u/sfz

... ??? !!!
u/iverjo

Impressive! I like the c.width|=M=Math hack. Apparently Math is evaluated to NaN in the process.
u/iverjo

http://stackoverflow.com/a/11037887/2319697
u/alien

god... i can't understand this yet but is awesome...
u/sigveseb

So good!
u/donbright

standing ovation
u/tomkh

great job! some tricks here really opens new possibilities
u/mxfh

you can do M.sqrt() with ES6 power operator as **.5 should yield a net gain of 2 chars
u/FireFly

Oh right! I haven't gotten used to it yet since I'm on Fx51, which doesn't seem to support ** yet. Thanks!
u/FireFly

Oh, and also thanks for all the positive responses, everyone :)
u/iverjo

#sphere
u/lionleaf

#disco
u/f8f82804

#halftone #dithering #shading

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walsh9

function u(t) {

c.width|=Y=(d,e,a,l)=>l?(x.moveTo(d,e),x.lineTo(d+=l*9*C(a),e+=l*9*S(a)),Y(d,e,a-S(t),--l),Y(d,e,a+S(t),l)):0;Y(960,999,4.71,14),x.stroke()

Mar 4 2017 5:56 PM UTC

}// 140/140

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fullscreen recommended

u/donbright

unbelievable!!!! wow
u/SpecialAgent

wonderful!
u/CocoMeister

#fractal

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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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kchplr

function u(t) {

G=t=>(10+Math.random()*50<<2).toString(16)
x.font='4em A'
s=G()+G()+G()
x.fillStyle='#'+s
x.fillText(s,100+(t*6|0)*260,100+(t*6%1*10|0)*100)

Mar 2 2017 4:22 PM UTC

}// 140/140

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Trying to reproduce https://twitter.com/AtticusBones/status/8370… as closely as possible

u/sfz

cute!
u/iverjo

+1 for the novelty
u/DataMeta

#colors
u/DataMeta

#colors

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FireFly

function u(t) {

t||x.translate(X=960,540,c.onmousemove=e=>X=e.offsetX);for(i=80;i--;x.rotate(8))x.fillStyle=`hsl(${X},80%,${i}%)`,x.fillRect(i,S(t)*960,i,i)

Feb 28 2017 9:39 PM UTC

}// 140/140

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Interactive demo! Move your mouse to change colour!

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u/FireFly

Thanks to veubeke and p01 for golfing tips :)
u/lionleaf

Oh wow! That's amazing
u/sigveseb

really nice!
u/iverjo

Sick!
u/profit

really cool!
u/lionleaf

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

ridiculously awesome
u/SpecialAgent

Excellent! And packed full of useful technical tricks, double whammy!
u/Xen

Done Re-mi(X)en
u/jaemiejaemie

borrowed the code used for capturing the mouse x on #4296, thank you
u/iverjo

#interactive
u/lionleaf

#spiral

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New_Core

function u(t) {

w=c.width=128;for(i=w*w;i--;)x.fillStyle=R(0,0,0,Math.random()),x.fillRect(i%w,i%(w-1),1,1);x.font='5em A';x.fillText("☠",25,65);

Feb 28 2017 8:16 PM UTC

}// 129/140

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I did one with ImageData but the skull didnt fit in. (it was faster but not fast enough to size it up).

u/sfz

swank!
u/New_Core

#noise

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HeyJD

function u(t) {

c.width^=0;r=480;for(θ=44/7;θ>0;θ-=.7/(C(t)+1))for(φ=p=11/7;φ>-p;φ-=1/r)x.lineTo((C(t)*S(φ)-S(t)*C(φ)*S(θ))*r+r*2,C(φ)*C(θ)*r+r);x.stroke()

Feb 26 2017 5:46 PM UTC

}// 140/140

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You can change the ".7" number to be a lower number like .2 to increase the number of segments in the sphere.

u/donbright

brilliant

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gormisdomai

remix of d/1194 by u/gormisdomai

function u(t) {

c.width=1920;
for(i=0;i<50;i++)
x.fillRect(950+T(t+i)*900, 0, 20, 2000)
for(i=0;i<50;i++)
x.fillRect(0, 350+T(t+i)*900, 2000, 20)

Feb 24 2017 3:32 PM UTC

}// 129/140

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"Dislocation #4"

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sigveseb

remix of d/271 by u/3bl3gamer

function u(t) {

W=c.width=255;for(i=9<<12;a=i&W,b=i>>8,n=b-45,m=a-99,i--;x.fillRect(a,b,A=1/(((t+a/n)%2)^b/n),A))n*=(B=(W*S(t*29+n/5)+m*m+n*n)/5e3)<1?C(B):1

Feb 24 2017 12:35 AM UTC

}// 140/140

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Based on some of 3b3lgamer's stuff (remix link got broken).

Show more comments…
u/donbright

dude you are the king,.. O M GOSH
u/Renaud___

Fantastic :S
u/lionleaf

Fixed the remix link for ya :)
u/nashcat

holy sh*t
u/Kalanchoe

H...how? This is so impressive.
u/magna

Needs more music.
u/xem

inhuman
u/donbright

still the one that blew my mind the most.
u/lionleaf

#wobble #wobbly #water #mirror #checkerboard #refraction #sphere
u/Xaotic

wtf
u/firegodjr

#raytracing #best
u/stiaje

#witchcraft
u/sigveseb

This one used to be fast, wonder why it is slow now?

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