Dweets awesomed by u/magna

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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dongwoo

function u(t) {

c.width|=0
x.font='4cm a'
x.translate(f=900,f)
g=(h,j,k)=>x.fillText(h,j,k)
g('🐩',-20,80)
x.rotate(Math.abs(S(t*12))*Math.PI/5)
g('🐕',0,0)

Jul 20 2017 1:56 AM UTC

}// 138/140

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u/sigveseb

lol
u/magna

Background music to go with it: https://www.youtube.com/watch?v=ivJrE_Wory0

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p01

remix of d/2914 by u/p01

function u(t) {

for(i=c.width|=0;i--;)x.fillText(i,i%99*19,T(i+t)*i)

Jul 19 2017 9:51 PM UTC

}// 52/140

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52 bytes WATERFALL

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James

function u(t) {

for(i=441;i--;)if(!+("肂胺ꗲ阴ꑚꢑ겢뺮ﰂ퐇ﱟ쌥쐐얄镯쿵즀둂뺅貋鯺雝뀟걯肽^".charCodeAt(i/15).toString(2).substr(1)[i%15]))x.fillRect(i%21*44,~~(i/21)*44,44,44)

Jul 18 2017 9:31 PM UTC

}// 137/140

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u/sigveseb

Nice! Is it a valid QR code?
u/stiaje

I scanned it! Goes to x.com ;)
u/stiaje

*spoiler alert*

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Xen

remix of d/2877 by u/cesque

function u(t) {

t||x.translate(X=960,Y=540);x.rotate(t*t/X);for(j=Y;j-=9;)(l=>{for(i=j;i--;x.fillRect(X+q(C),Y+q(S),.05,t*t)){q=n=>l*n(i)+(S(j)*l*t*t)}})(j)

Jul 17 2017 7:25 PM UTC

}// 140/140

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I spent an unusually long 2 hours on this one, ALOT of love went into it. shoutz to cesque

u/donbright

excellent, kinda feels like old time drawing
u/sigveseb

pretty
u/cesque

love it! thanks for the remix :)
u/iverjo

Beautiful!
u/Xen

you're welcome Cesque ;-)

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CodeUh

function u(t) {

W=c.width=1920;x.translate(W/2,0);for(i=0;i<W/2;i++){x.fillRect(1,1+i,5,5);x.rotate(C(d=t+i/.1));x.fillStyle=i%2==1?"#006600":"#660000"}

Jul 17 2017 6:18 PM UTC

}// 136/140

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u/joeytwiddle

I like how half of the points stay still through the middle of the swing
u/iverjo

Kinda intriguing

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dongwoo

function u(t) {

x.fillRect(0,950,620,c.width|=0)
x.font="6cm a";['🎈','🤡','⛵'].map((e,i)=>{k=(i+2)%3;x.fillText(e,200*i,1750-(t%5>k+1?1:t%5<k?0:t%1)*680)})

Jul 17 2017 5:52 AM UTC

}// 138/140

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u/XMF

I thought you would use integers for this, but they're all floats down here.
u/Polyducks

omg that's an amazing reference.

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New_Core

function u(t) {

c.width|=0
Y=800
for(i=400;i--;x.fillRect(i*5,Y,5,5))Y+=5*S(a=-10*.02+S(i/50+S(t*i/9)))
x.font=3+'cm a';x.fillText("⛪",650,-230+Y)

Jul 15 2017 8:19 PM UTC

}// 130/140

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alien

remix of d/2849 by u/alien

function u(t) {

w=c.width=200;f=frame
c.style.background='#B28'
x.beginPath()
 for(i=0;i<w;i++)
  x.lineTo(55*S(.82/t+i)+99,50*C(.1*t/i*15)+60)
 x.stroke()

Jul 13 2017 6:19 PM UTC

}// 140/140

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Dancing cobra.

u/donbright

so weird and cool

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cantelope

remix of d/2845 by u/cantelope

function u(t) {

A=960,B=540,x.fillRect(0,0,D=2e3,D)
for(i=D;i--;)x.clearRect(A+1/(Z=2.5+C(p=i*C(t/2)/40)*S(q=i/628))*(X=S(p)*S(q))*A,B+C(q)/Z*A,s=69/Z/Z,s)

Jul 10 2017 4:43 AM UTC

}// 140/140

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Show more comments…
u/lionleaf

That's really neat!
u/Polyducks

This is amazing! What's the concept behind it? How are you getting the sphere?
u/cantelope

@Polyducks, it's a golfed version of the equation of a sphere [x=sin(p1)*sin(p2);z=cos(p2);z=cos(p1)*sin(p2);] combined with a tiny 3D projector, X=cx+1/z*x*cx; Y=cy+y/z*cx, where cx/cy is center screen, and x/y/z are the 3D coordinates. Hope that makes sense! :)
u/cantelope

*equation of a sphere: [x=sin(p1)*sin(p2);y=cos(p2);z=cos(p1)*sin(p2);]
u/alien

thanks for that, is projector a mathematical construct? does it have other names?
u/cantelope

@alien it's my own invention, the product of years of research into geometry. I wrote a tutorial with a (very ungolfed) version here https://cantelope.org/3D
u/alien

*__*
u/alien

All the lienar algebra and vectorial calculus in my bachelor finnally comes to life in my head... this is soooo cool @cantelope...
u/donbright

bravo... bravo
u/ximavus

Amazing!

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donbright

remix of d/2839 by u/alien

function u(t) {

w=c.width=115
for(j=w;j--;)
for(i=w;i--;)q=2*i*j*S(t)+C(t)*(i**2+j**2),x.fillStyle=R(s=(q*q*frame>>t)%255,s,s*3),x.fillRect(i,j,1,1)

Jul 10 2017 3:22 AM UTC

}// 132/140

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remixing @alien color + code with some of my old binary quadratic forms stuff (aka circles and squares pseudo fractals)

u/cantelope

cool donbright
u/donbright

thx cantelope

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