Dweets awesomed by u/zanella

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.

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

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yonatan

function u(t) {

c.width=-1
f=(u,v,a,r)=>r<1?x.lineTo(u,v):f(u+S(a)*r,v+C(a)*r,a*(z=0|t)+t/z,r/3)
for(i=1e3;i--;)j=i*2*Math.PI/999,f(150,84,j,55)
x.stroke()

Oct 17 2018 6:43 AM UTC

}// 139/140

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u/BalintCsala

What a coincidence https://math.stackexchange.com/questions/183…
u/yonatan

Wow! that's exactly how this works (circles around circles around circles)
u/katkip

Awesome
u/joeytwiddle

Yeah these wobbly circles are cool #spirograph #pattern
u/katkip

this is a low iteration #fractal

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ms.roboto

function u(t) {

x.lineWidth=4
c.onclick=e=>S=[e.clientX*3.4,e.clientY*3.4,1,0,Math.PI*2,1]
S[2]<2000&&(x.beginPath(),S[2]*=1.2,x.arc(...S),x.stroke())

Oct 16 2018 11:39 AM UTC

}// 134/140

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Click - Waves

u/magna

#interactive

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jbrewhaha

function u(t) {

t*=16
n=1920
for(i=0;i<n;i++){
 s=128*S(t-i/n)+128
 r=t%2>1?s:0;
 x.fillStyle=R(s,0,256-s)
 x.fillRect(i,0,1,1080)
}

Oct 16 2018 10:25 AM UTC

}// 116/140

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The dwitter police have arrived

u/joeytwiddle

Woop woop d/2932
u/iverjo

#police
u/joeytwiddle

Sound effect to go with it: d/1792

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joeytwiddle

function u(t) {

for(c.width|=j=20;j--;x.fillRect(960+S(k=9*t+j/2.3)*12-w,540+C(k)*12-h,2*w,2*h))x.fillStyle=R(s=13*j,s,r=s*1.5),w=r*(.5+j%2),h=r*(1.5-j%2)

Oct 16 2018 9:51 AM UTC

}// 138/140

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Blue cross tunnel - a tribute to https://pycodelic.blogspot.com/2018/08/tunne…

u/joeytwiddle

Oops the ripples should come outwards k=9*t-j/2.3
u/sigveseb

pretty colors
u/joeytwiddle

That website is actually made by a Dwitter user, but I'm sorry I forgot who!

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f8f82804

remix of d/10469 by u/f8f82804

function u(t) {

for(w=c.width=594;w-=99;x.stroke())for(a='moveTo',i=17;i--;a='lineTo')x[a](297+w*S(p=1.57*(i-(i>>2))+t)/(Z=4+C(p)),99+.4*w*((i&4)+T(t+w))/Z)

Oct 15 2018 10:51 PM UTC

}// 140/140

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#d3 #perspective #cube #remix

u/f8f82804

#wireframe

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pavel

function u(t) {

t||(i=a=n=0,j=1e3,f=n=>n&&f(n>>1)-n&1)
for(z=n<4e4&&44;z--;)f(n++)?x.fillRect(i-=.88*C(A=a*Math.PI),j+=.88*S(A),2,2,a+=1/3):a--

Oct 15 2018 9:39 PM UTC

}// 127/140

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Koch curve #fractal

u/pavel

This is a turtle graphic, the function f(n) implements the Thue–Morse sequence

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jbrewhaha

function u(t) {

s=150
f=255
for(i=0;i<1920/s;i++) {
 f=~f*S(t)
 for(j=0;j<1080/s;j++) {
  f=~f
  x.fillStyle=R(f,f,f);
  x.fillRect(s*i,s*j,s,s)
 }
}

Oct 15 2018 6:47 PM UTC

}// 133/140

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First dweet!

u/lionleaf

Nice one! Welcome :)
u/iverjo

Welcome

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ms.roboto

function u(t) {

w=1920;h=1080;if(T.call||T<h){S.call&&(S=Array(w).fill(0),S[w/2]=1,T=0);S=S.map((_,j)=>(n=S[j-1]^S[j+1],n&&x.fillRect(j,T,2,2),n));T++}

Oct 15 2018 6:24 PM UTC

}// 135/140

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Rule 90

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katkip

function u(t) {

x.fillStyle=R(0,0,0,0.02),x.fillRect(0,0,2e3,2e3),x.fillStyle='#fff';for(i=0;i++<t*t;)x.fillRect((v=Math.random,v())*1920,v()*1080,10,10)

Oct 15 2018 12:57 PM UTC

}// 137/140

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Overpopulation. The whole dweet is written on mobile.

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gabrielsroka

function u(t) {

eval(unescape(escape`睩瑨⡸⥯湭潵獥浯癥㵥㴾氨匽攮砬䌽攮礬吽挮睩摴栽㔶㠩ⱸ⹬㵬楮敔漬氨䔽匯㈬䐽䌯㈩ⱬ⡅ⱊ㵄⬹㤩ⱬ⡓ⱆ㵊⨲⤬氨匬䌩ⱬ⡗㵔⼲⭅ⱄ⤬氨圬䨩ⱬ⡓ⱆ⤬氨匬䌩ⱬ⡅ⱄ⤬氨㈪圯㌬䌯㌩ⱬ⡗ⱄ⤬氨匬䌩ⱳ瑲潫攨⤻`.replace(/u(..)/g,"$1%")))

Oct 14 2018 8:53 PM UTC

}// 140/140

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#interactive #d3 #perspective, see also https://www.khanacademy.org/computer-program…

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u/gabrielsroka

see also https://www.dwitter.net/d/9207
u/gabrielsroka

uncompressed: with(x)onmousemove=e=>l(S=e.x,C=e.y,T=c.width=568),x.l=lineTo,l(E=S/2,D=C/2),l(E,J=D+99),l(S,F=J*2),l(S,C),l(W=T/2+E,D),l(W,J),l(S,F),l(S,C),l(E,D),l(2*W/3,C/3),l(W,D),l(S,C),stroke()
u/gabrielsroka

#cube maybe?
u/pavel

onmousemove=e=>[S=e.x,E=S/2,E,S,S,W=284+E,W,S,S,E,W*2/3,W,c.width=568].map((a,i)=>x.lineTo(a,[C=e.y,D=C/2,J=D+99,F=J*2,C,D,J,F,C,D,C/3,D][i])),x.stroke()
u/yonatan

139 with Path2D: onmousemove=e=>x.stroke(new Path2D('M'+[S=e.x,C=e.y,E=S/2,D=C/2,E,J=D+99,S,F=J*2,S,C,W=274+E,D,W,J,S,F,S,C,E,D,2*W/3,C/3,W,D],c.width=568))
u/gabrielsroka

u/pavel - i was just thinking about trying something similar, but you beat me to it. well done!
u/gabrielsroka

u/yonatan - i was not aware of Path2D. thanks, and well done! i also see my T could be optimized (leftover from a previous iteration)
u/donbright

brava
u/rep_movsd

#underrated

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