Random 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

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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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robbyg

function u(t) {

x.fillRect(960+C(t/2)*400+C(t*3.7)*100,540+S(t/2)*400+S(t*3.7)*100,9,9)

Jan 3 2018 9:14 PM UTC

}// 71/140

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Nick

function u(t) {

a=128;b=10*S(7*t/5);
for(i=0;i<50;i++)
c=a+a*S(i/10),
x.fillStyle=R(c,a+a*S(3*t),255-c,i),
x.fillRect(960+b*S(t)*i,540+b*C(t)*i,15,15)

Mar 2 2017 6:01 AM UTC

}// 134/140

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u/donbright

reat color

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Xen

remix of d/8252 by u/prplz

function u(t) {

r=Math.random
for(i=1e3;i--;x[S(((22-y)**2+(13-z)**2)**.2-t*C(t/i))**5>.2?'clearRect':'strokeRect'](y*T,z*T,9,T=44))y=r()*T,z=r()*T

May 28 2018 12:38 PM UTC

}// 131/140

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little test

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Qwitter

function u(t) {

c.width=1920 ; p =.12*t
for(i=0;i<9;i++)
{x.transform(C(p),-S(p),S(p),C(p),-40,0);
x.fillRect(400+i*140+S(t)*300,400,50,200) }

Jan 12 2018 1:21 PM UTC

}// 126/140

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rep_movsd

function u(t) {

eval(unescape(escape`𭁼𯀨𡀽𫡥𭰠𢑭𨑧𩑄𨑴𨐨𨰮𭱩𩁴𪀽𥰽𜠵𝐬𢀽𥰩𚐊𩡯𬠨𨐽𡀮𩁡𭁡𛁩🐰𞱩🁗𚡈𞱩𚰫𚐊𩡯𬠨𦐽𛠳𚰨𪐯𥰩𛰲𞐬𦀽𚁩𙑗𚐯𜠹𛁪👩𚠴𛁋👃𚁘𚐭𤰨𦐪𠰨𦀫𦐩𚐪𠰨𭀫𦀯𦐩𚱴𛁯🐱𞱯🀴𞰫𚱯𚑡𦱪𚱯𛐱𧐽𠰨𢰪𫰩𚠨𨑛𪠫𜱝👗𚐊𮀮𬁵𭁉𫑡𩱥𡁡𭁡𚁄𛀰𛀰𚐻`.replace(/u../g,'')))

Oct 4 2021 1:44 PM UTC

}// 140/140

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Plasma

u/primo

Very nice.
u/sigveseb

solid
u/magna

smooth
u/rep_movsd

It uses pretty much the same formula as the previous dweet, but just prettier

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frostycpu

function u(t) {

for(i=648,f=a=>233*a-9*m,c.width=4e2;n=i%36,m=S(t*9-n),i--;x.fillRect(99+5*n,75+5*(i/36|0)+m,5,6))x.fillStyle=R(f(o=n>11),f(o&n<24),f(n<24))

Jan 7 2018 1:55 PM UTC

}// 140/140

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u/sigveseb

these flags rock
u/iverjo

Good style
u/iverjo

#flag

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KilledByAPixel

remix of d/23975 by u/tomxor

function u(t) {

for(X=t&&X+r*25,i=h=5+X%4*C(t*5)<<6;--i;x.fillRect(...t?[X-r*i/8,600+(r*8&3?i-h:h-i),i/4,2]:[i*8,r*600,h,r]))r=1+S(i^X)

Oct 6 2021 6:12 PM UTC

}// 119/140

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Tiny Tree Lake 🌲 Golfed by pavel, gibson042, yonatan, tomxor, and me

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u/magna

If you keep golfing this down, I'm going to come and slap a default on top of it!
u/rep_movsd

C(t) also produces a passable landscape
u/tomxor

#teamwork !
u/danny@hille.dk

114 -> for(X=t&&X+r*25,i=h=5+X%2*t<<6;--i;x.fillRect(...t?[X-r*i/8,600+(r*8&3?i-h:h-i),i/4,2]:[i*8,r*600,h,r]))r=1+S(i^X)
u/KilledByAPixel

that is good but we lose the curve which is the only thing holding together the composition
u/rep_movsd

for(X=t&&X+r*25,i=h=6+2*C(t*5)<<6;--i;x.fillRect(...t?[X-r*i/8,600+(r*8&3?i-h:h-i),i/4,2]:[i*8,r*h,h,r]))r=1+S(i^X)
u/rep_movsd

for(X=t&&X+r*25,i=h=6+2*C(t*5)<<6;--i;x.fillRect(...t?[X-r*i/8,600+(r*8&3?i-h:h-i),i/4,2]:[i*8,r*h,h,r]))r=1+S(i^X)
u/KilledByAPixel

great attempt! not sure it is possible to get smaller without cutting something. in this case the X%4 part is necessary to make the trees varying heights
u/FireFly

"boring" -1, distribute the ?: across args in the fillRect: x.fillRect(t?X-r*i/8:i*8,t?600+(r*8&3?i-h:h-i):r*600,t?i/4:h,t?2:r). Or more depending on what artistic tradeoffs you're okay with, e.g. just always setting height to r isn't terrible

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rodrigo.siqueira

remix of d/24908 by u/rodrigo.siqueira

function u(t) {

with(x)for(i=800;i--;fillRect(~setTransform(i,0,0,i,880+i+3*i*C(i),700+2*i*C(i/400)),~rotate(i/6+t/2),2,2))fillStyle=R(i/5,i/4,i/3,.07)

Feb 11 2022 12:45 PM UTC

}// 135/140

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Misty mountain fog #smoke

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u/tomxor

Simple but very effective!
u/aleamb

wow!
u/vain

OMG! It looks so great. Where do you guys get the ideas & math formulas from?
u/magna

O M G
u/rodrigo.siqueira

u/vain It is the combination of rotations, scaling and translations (setTransform) and transparent color (.07 opacity). I remix and play with parameters and all stems from u/pavel 's Underwater cavern: https://www.dwitter.net/d/18597 My previous dweets are also remix of it. The math formulas (sin and cos) are not the main thing, they just create some almost random numbers with cyclic properties. I can not predict the result only looking to the formulas. I remix and explore combinations and post when I find interessting results.
u/vain

u/rodrigo.siqueira Thank you for your feedback and the nice and detailed description. Keep on your nice work! ;-)
u/joeytwiddle

Beautiful! #cloud #mountain #scene

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SkibidiHawk

remix of d/32348 by u/NumbersTada

function u(t) {

t||(s="",f=0)
c.width=1920
f++
x.font="70px sans-serif";x.fillText((f/t).toFixed(100)+" FPS",0,70);

Jul 20 2025 2:55 PM UTC

}// 99/140

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u/Odog8

What does this converge to?
u/joeytwiddle

Framerate #fps I wonder when it will reach 60.0000000000

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rodrigo.siqueira

remix of d/10850 by u/yonatan

function u(t) {

c.width=i=w=300
x.font=7*S(t/2)+'em"',x.fillText('🛸',99,m=99)
for(i;i--;x.fillRect(0,i,w,i/w))x.drawImage(c,0,m,w,1,-i*4,m+i,w+i*8,.3)

Nov 5 2018 7:37 PM UTC

}// 134/140

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Alien invasion (flying saucer) #emoji