Dweets awesomed by u/Xen

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) {

r=c.offsetWidth/(c.width^=0)
t?o?(m+=o/60,n+=p/90):0:o=!(m=n=300)
c.onmousemove=e=>(o=e.x/r-m,p=e.y/r-n)
x.font='80px"'
x.fillText('🚁',m,n)

Oct 2 2018 2:54 PM UTC

}// 139/140

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Surveillance helicopter – it only sees you when you move

u/donbright

hmm my firefox doesnt seem to like it
u/donbright

oh now it works! re-scrolled and scrolled back here. nice.
u/joeytwiddle

#interactive

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prplz

remix of d/9912 by u/prplz

function u(t) {

for(c.width|=0,i=17e3+t*99;i>0;i-=100)x.fillRect(i%1920,i%1080,i%99,i%99)

Oct 2 2018 5:40 AM UTC

}// 73/140

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u/iverjo

This reminds me of the old Windows 3.1 days

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yonatan

remix of d/10211 by u/BalintCsala

function u(t) {

for(k=i=1e3;z=i--/6;x.fillRect(k+S(m=(k*j&-b)**4)*r-z,z+C(m)*r,s=5e3/z,s))b=i%9>0,j=(i/k+t)%1,r=8e3/z+b*k/z,x.fillStyle=R(a=S(j*9)*99+z,a,a)

Oct 2 2018 5:23 AM UTC

}// 140/140

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Strange crystals v0.140b

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u/joeytwiddle

Blimey!
u/robbyg

I would love to read a write-up of this some time!
u/BalintCsala

They aren't really complicated, they draw a circle of rectangles with a pseudo random displacement to make it seem more natural. The track is just a bunch of rectangles
u/richev

Maybe not complicated once you understand how it works, but sure seems complicated to me. As @robbyg said, I'd love a detailed write-up.
u/yonatan

write-up: http://zozuar.org/txt/sc/
u/Joachim

#tunnel #cavern

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Purpzie

remix of d/251 by u/lionleaf

function u(t) {

B=' BOTTLES OF BEER';O=' ON THE WALL. '
a=i=>i&&i+B+O+i+B+'. TAKE 1 DOWN, PASS IT AROUND, '+(--i)+B+O+a(i)
x.fillText(a(c.width=99),-t*99,9)

Oct 1 2018 8:23 PM UTC

}// 140/140

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fixed the grammar and made it funnier

u/donbright

bwahaha

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Xen

remix of d/10195 by u/0x90

function u(t) {

//with(x)fillStyle=`hsl(${t*2e3},50%,50%)`,drawImage(c,S(t*t)*99,C(t*t)*99),font='300px"',fillText('TRIGGERED',175,700)

Oct 1 2018 7:57 PM UTC

}// 119/140

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photosensitive warning... remove //

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ellisk1

function u(t) {

c.width|=q=.2992;x.translate(960,540);for(i=0;i<329;i++)x.rotate(q+(i%22?0:q/2)+(i<1)*t),x.fillRect(a=((i/22|0+t/2)+2*t)%15*50,a,w=a**.75,w)

Sep 30 2018 11:45 PM UTC

}// 140/140

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Changing Circular Patterns

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Xen

remix of d/10189 by u/QXY

function u(t) {

for(c.width|=i=99;i--;x.stroke())x.lineWidth=i,x.beginPath(),x.arc((o=i&1?-99:99)*2*C(t)*S(t*.2)+960,o*5*S(t*3)*C(t)+520,i**2,0,7)

Sep 30 2018 9:57 PM UTC

}// 130/140

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yonatan

remix of d/10175 by u/yonatan

function u(t) {

eval(unescape(escape`景爨挮睩摴栽㤹Ⱪ㴲攳㭩ⴭ㭾⡱籙⤦㐦☱㰼⡙㰼㉼焪㈩☳㔹㑼籸⹦楬汒散琨㔰⭃⡭⤪爬甪㈲ⵓ⡭⤪爯㌬㘬㔩⥡㵩⼱㠬爽⠹⭃⡩⤩⨶⩓⡓⡵㴳⵩⼶㘶⤪⨮㔩ⱸ⹦楬汓瑹汥㵒⡧㵓⡭㵴⭡⤪㌰〬术㈩ⱙ㵵⨳ⴴⱱ㵡┶⸳`.replace(/u(..)/g,"$1%")))

Sep 30 2018 7:51 PM UTC

}// 140/140

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Another jackolantern (thx u/BirdsTweetCodersDweet)

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u/yonatan

for(c.width=99,i=2e3;i--;~(q|Y)&4&&1<<(Y<<2|q*2)&3594||x.fillRect(50+C(m)*r,u*22-S(m)*r/3,6,5))a=i/18,r=(9+C(i))*6*S(S(u=3-i/666)**.5),x.fillStyle=R(g=S(m=t+a)*300,g/2),Y=u*3-4,q=a%6.3
u/yonatan

Light it with: R(g=300-S(m=t+a)*255,...
u/joeytwiddle

#halloween #pumpkin
u/donbright

insane
u/katkip

i do not have word to say
u/magna

*curse words*
u/sigveseb

holy
u/UEZ

Can you explain me how JS executes this: ~(q|Y)&4&&1<<(Y<<2|q*2)&3594||x.fillRect()? Thx

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Xen

function u(t) {

for(x.fillRect(0,0,c.width=i=2e3,i);i--;x.fillRect(1e3+C(i/3-t/5)*1e3,198*S(t+i)+i*.6,1,1))x.fillStyle="#fff"

Sep 30 2018 7:37 PM UTC

}// 109/140

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Fullscreen

u/katkip

I like that they don't touch
u/donbright

woah

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QXY

function u(t) {

c.width|=0;for(i=69;i--;){x.lineWidth=i,x.beginPath(),x.arc((o=i&1?-99:99)*2*C(t)*S(t*.2)+960,o*.9*S(t)*C(t*.7)+520,i**1.76,0,7),x.stroke()}

Sep 30 2018 7:37 PM UTC

}// 140/140

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boring interference :)

u/Xen

i love it :)
u/donbright

fascinatin
u/donbright

i was looking up Young's double slit - this reminds me of his original drawings he made in the early 1800s, https://bit.ly/2OsA1mh

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