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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rodrigo.siqueira

remix of d/23528 by u/rodrigo.siqueira

function u(t) {

for(c.width=w=482,d=new ImageData(w,w),m=w*w,i=3;m--;d.data[i+=4]=Y*w&7e8)X=m-t*9e4,Y=m%w&X/w-S(m%w/99+t*3)*w/8
x.putImageData(d,0,0)

Aug 12 2021 1:52 PM UTC

}// 133/140

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#Sierpinski waves

u/danny@hille.dk

Love it: - idk why, but it reminds me of the old windows logo https://logodix.com/logo/661924.png

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ellieeet

function u(t) {

for(var i=0,b='#',c=Math.random;i<8;i++)b+='13579bdef'[Math.floor(c()*9)];x.fillStyle=b,x.fillRect(c()*1920-99,c()*1080-99,c()*999,c()*999)

Feb 22 2022 6:41 PM UTC

}// 139/140

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my first ever post here, nothing super special but i thought it was kinda cool

u/Xen

welcome to the dwitter family!

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jes5199

function u(t) {

g=new Float32Array(1);t*=60;for(b=1080;b;b--){c=(t-960)*3;d=(b-540)*3;v=c*c-d*d;g[0]=v;v-g[0]>0?x.fillRect(t,b,1,1):0}

Mar 9 2017 7:40 AM UTC

}// 118/140

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u/FireFly

This one is cool, it's dependent on aliasing artifacts due to limited float precision, yeah?
u/recursive

Pity "Float32Array" is the only way to convert to single precision. Or is it?
u/recursive

I guess it's not. I've reproduced it without using Float32Array pixel for pixel using mantissa manipulation. https://www.dwitter.net/d/1990
u/donbright

awesome studies of fp

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AOctavio

function u(t) {

c.width=1920
x.fillStyle=(R(99*S(t),99*C(t),99*T(t)))
for(i=0;i<9;i++)
x.fillRect(300+S(i*11)*100+T(t)*30,550,100*C(t),500*C(t))

May 8 2020 5:57 PM UTC

}// 128/140

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I made it wackier

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taupelink

remix of d/31832 by u/taupelink

function u(t) {

f=u=>((u%4-2)**2-2)**2*j;g=n=>f(X*n/8)+f(Y*n/8)&4;for(i=2e4;i--;x.fillRect(498+8*X,28+8*Y,g(j=i%4+.5)<g(2*j),t<2*g(1)))X=i*i*t%128,Y=X*i%128

May 27 2024 6:26 PM UTC

}// 140/140

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d/31916

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gojomo

remix of d/838 by u/gojomo

function u(t) {

c.width=1920;for(i=24;i--;)for(j=24;j--;)t+=1.1,s=S(t)*((j+i&1)*2-1),x.setTransform(C(t),s,-s,C(t),i*99,j%12*99),x.fillRect(-9,-49,19,99)

Feb 22 2017 11:27 AM UTC

}// 137/140

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u/z3vin

I like this, you can save a couple bytes: c.width^=0;for(i=24;i--;)for(j=24;j--;)s=S(t+=1.1)*((j+i&1)*2-1),x.setTransform(C(t),s,-s,C(t),i*99,j%12*99),x.fillRect(-9,-49,19,99)

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sigveseb

function u(t) {

B=" bottles of beer";O=" on a wall. ";a=i=>i&&i+B+O+i+B+". Take 1 down 'n pass it round, "+(i-1)+B+O+a(i-1);x.fillText(a(c.width=99),-t*9,9)

Jul 20 2016 1:49 PM UTC

}// 140/140

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timothytomato

remix of d/28788 by u/timothytomato

function u(t) {

x.globalCompositeOperation="xor"
c.style.filter=`contrast(100)invert(`
x.font="100em'"
x.fillText('👻',250,1800+S(t)*700)

Nov 11 2023 5:31 AM UTC

}// 120/140

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a bit late but #ScaryMovies

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remix of d/2041 by u/donbright

function u(t) {

c.width=1024;w=120;for(i=w*w;i--;)X=i%w,Y=i/w>>0,P=8*((1-t*t)*X*X/(3+t*t)+55*t*Y*Y/(1+t*t)),x.fillRect(10+X*10,Y*10,P%21,P%101)

Mar 11 2017 11:12 AM UTC

}// 129/140

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u/donbright

this is fascinating the way it highlights the line. after a while it looks like weird rain drops.

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lionleaf

function u(t) {

c.width=2e3;t*=4;x.translate(980,540);for(i=0;i<32;)x.rotate(!i*C(t-=.03)+!(i++%4)*S(t)/9+1.57),x.fillRect(9*i,9*i,99,99)

Jan 8 2016 12:44 AM UTC

}// 121/140

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u/ben

cute!
u/lionleaf

#floppy
u/erin

meaning of life