New dweets | Dwitter

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

Please log in (or register) to post a dweet (copy-paste the code somewhere safe to save it meanwhile)


    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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

show FPS hide FPS share fullscreen

username

remix of d/14849 by u/username

function u(t) {

for(c.width|=i=17;i--;x.fillRect(325+i*76+C(t)*3e2,400+S(g=(i+1)*t)*99,43,2e2))x.fillStyle=`hsl(${2*S(g=(i+1)*t/2)*32},67%,50%`

Jul 1 2019 12:17 PM UTC

}// 127/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

improved #default pendulums?

show FPS hide FPS share fullscreen

pavel

remix of d/14846 by u/KilledByAPixel

function u(t) {

r=_=>Math.random();(frame-1)%600?0:d=r(m=r(c.width=960))
f=g=>260*((1-m)*g(a=8*t)+d*m*g(a-a/m))
x.lineTo(480+f(C),270+f(S));x.stroke()

Jul 1 2019 7:54 AM UTC

}// 134/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#spirograph generator

u/pavel

I believe this generates all valid spirographs, at least the circle with a small pencil hole rolling in a circle ones.
u/pavel

The incremental drawing is not parameter aware so at the extremes its too slow / too fast and choppy
u/pavel

I was gonna improve this by using the period of a spirograph but gave up deriving it.
u/pavel

I think the period is the denominator of 1-1/m expressed as an irreducible fraction.

show FPS hide FPS share fullscreen

taupelink

function u(t) {

t||(c.width=162,r=X=4567,s=Y=89,h=l=n=1,i=k=0)
r&&x.fillText(h+`x${X}+(${k})x${Y}=`+r,0,n++*9),q=r/s|0,[h,k,r,i,l,s]=[i,l,s,h-q*i,k-q*l,r%s]

Jul 1 2019 4:45 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Extended Euclidean algorithm, to find h, k such that hX+kY=gcd(X,Y) #math #numbertheory

u/durian-favored-monster

i remember this in high school it was very cool! good job! this is the best text one i've seen
u/geb

EEA is so cool!

show FPS hide FPS share 1 remix fullscreen

KilledByAPixel

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪁼👲👮🐾𤰨𚁩𚱴𯀰𚐪𪠪𚡮𚰹𚐪𞑼𜀻𩡯𬠨𨠽𜐲𜀻𨠭𛐻𚑦𫱲𚁩👢𙐱𜀬𪠽𨠯𜐰𯀰𛁫🐹𞐻𪰭𛐻𮀮𩡩𫁬𤡥𨱴𚀲𝀰𚠨𪐭𭀥𜐩𚱦𚁓𚐬𜐸𜀫𜠴𜀪𚀨𪠥𝀩𙐱𜀩𚱦𚁃𚐬𮠽𞐫𬠨𝠩𛰴𛁺𚐩𩠽𡠽🠸𚡲𚀴𚐪𡠨𬠨𜰩𚡫𛰹𞐩𚰶𚡲𚀵𚐪𡠨𬠨𜠩𚡫𛰹𞐩`.replace(/u../g,'')))

Jul 1 2019 4:45 AM UTC

}// 138/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Random Spirographic Doodles V2

u/KilledByAPixel

These are unfinished spirographs with random parameters. I switched to using rect instead of lines and made other changes to help with performance. Also I added smooth scrolling (or smooth as possible given the framerate)

show FPS hide FPS share 1 remix fullscreen

KilledByAPixel

function u(t) {

r=X=>S((X|0)*(Y|0))
f=_=>r(X)*(1-X%1)+X%1*r(X+1)
for(i=1920;i--;X=i/34,Y=frame/34,x.fillRect(i,frame,q=2*((1-Y%1)*f()+Y%1*f(Y++)),q));

Jul 1 2019 1:44 AM UTC

}// 134/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Strange Grating

u/joeytwiddle

I see paths trodden around city blocks. One block is rarely visited.
u/donbright

cool
u/rep_movsd

#underrated

show FPS hide FPS share 1 remix fullscreen

taupelink

function u(t) {

c.width=500;p=37;a=2+t|0;for(n=0,m=a;++n<=p;)x.fillStyle=R((n-1)%(p-1)?0:255),x.fillText(n,270+(k=40+n)*C(z=m*6.28/p),140-k*S(z)),m*=a,m%=p

Jul 1 2019 1:21 AM UTC

}// 139/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Demonstration of Fermat's little theorem. Powers of 2, 3, 4..., modulo 37, arranged around a circle broken up into 37 equal arcs. #math #numbertheory https://en.wikipedia.org/wiki/Fermat%27s_lit…

u/donbright

p is 37?
u/taupelink

Yep, I picked an arbitrary prime number for demonstration purposes
u/donbright

awesp,e

show FPS hide FPS share fullscreen

pavel

remix of d/14840 by u/pavel

function u(t) {

x.beginPath(x.lineWidth=FPS=p=Math.PI)
k=frame
k%2?n=99:(n=2+k/2,r/=C(p/n))
for(j=n+1;j--;)x.arc(960,540,t?r:r=60,a=2*p*j/n+11,a)
x.stroke()

Jun 30 2019 10:28 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/katkip

Wow! Perfect geometry

show FPS hide FPS share 1 remix fullscreen

Xen

remix of d/14840 by u/pavel

function u(t) {

for(c.width=1e3,r=262,k=98;k--;)for(r*=k%2||C(d),n=j=t+k%6?8+k>>1:2;j--;x.arc(480+C(2*t+k),270,r,a=2*d*j+t/4,a))d=22/7/(n-1)
x.fill`evenodd`

Jun 30 2019 10:22 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

shimmer v.s.

show FPS hide FPS share fullscreen

Xen

remix of d/14849 by u/username

function u(t) {

for(c.width|=i=199;i--;x.fillRect(i*19+C(t)*3e2-3e2,S(g)*199-200,i,2e3))x.fillStyle=`hsl(${g=i*t/4%2e3},99%,50%,.1`,x.rotate(C(g/2)/i)

Jun 30 2019 9:58 PM UTC

}// 134/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

fun tweak

show FPS hide FPS share fullscreen

Xen

remix of d/14838 by u/KilledByAPixel

function u(t) {

for(c.width|=i=187;i--;x.fill())for(x.beginPath(k=3);k--;x.arc(w+(i%17)*w,60+(i/17|0)*w,w/1.7-C(-t*5)*w*.01,a=k*1.57+t*(i%2-.5),a))w=99

Jun 30 2019 9:35 PM UTC

}// 135/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

quick test