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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Xen

remix of d/21624 by u/katkip

function u(t) {

throw t.toString(2)

Feb 8 2021 4:26 PM UTC

}// 19/140

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19bytes #binary #clock

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vgel

remix of d/27290 by u/vgel

function u(t) {

eval(unescape(escape`景爨眽瀽挮睩摴桼㵈㵍慴栮桹灯琻瀫㴲㜹ⱘ㴨儽瀥眩⼱攳ⴱⱙ㴨圽瀯睼〩⼵〰ⴱⱰ㰲收㭸⹦楬汒散琨儬圬猽㘰⽩ⱳ⤩景爨娽椽䐽ㄻ⬫椼㤦䐾⸱㬩娭㵄㵈⠨䠨⡃⡴⤪堭匨琩⩚⤬天⴮㐩Ⱘ䌨琩⩚⭓⡴⤪堩⤭⸱`.replace(/u([^D].)/g,'$1%')))

Mar 29 2023 7:06 PM UTC

}// 140/140

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dithered donut #sdf

u/vgel

got inspired by d/16174 for some ways to shrink it further :-)
u/Xen

shaved a few: for(w=p=c.width|=H=Math.hypot;p+=279,X=(Q=p%w)/1e3-1,p<2e6;x.fillRect(Q,W,s=60/i,s))for(Z=i=D=1;++i<9&D>.1;)Z-=D=H((H((C(t)*X-S(t)*Z),(W=p/w)/500-1)-.4),(C(t)*Z+S(t)*X))-.1
u/joeytwiddle

Nice effect!

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whackashoe

function u(t) {

f=a=>[0].concat(...a.map((v,i)=>[[0,2,0,1,0,1,0,2,0]][v])),f(f(f(f(f([0]))))).map((a,i)=>x.rotate(a)|x.fillRect(i*S(i),i/t,0.007,i))

Nov 21 2017 7:20 AM UTC

}// 132/140

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u/joeytwiddle

#texture

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btc@codebro.com

function u(t) {

var Z=(S(t)+1)/2*255
x.fillStyle=R(Z,Z,Z/6,1)
x.fillRect(0,S(t)*400+400,100*t,50)

Feb 28 2017 7:51 PM UTC

}// 82/140

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rodrigo.siqueira

remix of d/23361 by u/rodrigo.siqueira

function u(t) {

for(X=c.width=99;X--;)for(Y=99;Y--;x.fillRect(Y,X*(X%2-.5)+40,1,1))
o=255-X*Math.hypot(X-35+S(t*26)*9,Y-t%3*55+11),x.fillStyle=R(o*3,o,X)

Jul 21 2021 12:21 PM UTC

}// 137/140

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Bouncing ball reflection #ball

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danr

remix of d/4268 by u/danr

function u(t) {

w=2e3;for(c.width=i=w;i>=0;i-=99)for(j=0;j<2e3;j+=10){i2=i-w/2;j2=j-540
d=Math.sqrt(i2*i2*+j2*j2*j)/6
o=9+C(d-t*5)*5
x.fillRect(i,j,o,o)}

Dec 28 2017 3:08 AM UTC

}// 137/140

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WasifBoomz

function u(t) {

x.fillRect(960,540,t*100,t*100)
x.fillStyle=R(Math.random()*255,Math.random()*255,Math.random()*255)
x.rotate(t * Math.random()*1.5-1)

May 17 2019 11:50 AM UTC

}// 134/140

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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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the_yuhanna

function u(t) {

x.font='450px s'
x.fillText('Fuck you',100,600)
x.transform(1,0,0,1.02,0,-10)
x.fillStyle=`hsla(${867*t},80%,50%,${.004**t}`

Jun 24 2017 8:14 AM UTC

}// 124/140

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Xen

remix of d/27152 by u/rodrigo.siqueira

function u(t) {

for(j=99,i=170-t*j;j--;x.fillRect(960+r*S(a=i-S(i+j/9)/7),540-r*C(a),z=(i-j)*i/75/t,z),x.fillStyle=`hsl(${j*4},99%,${j}%,${z/a}`)r=i*j/7

Mar 4 2023 4:33 PM UTC

}// 136/140

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play