Dweets awesomed by u/FireFly

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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recursive

function u(t) {

w=C(t)
h=S(t)
for(c.width|=s=i=H=512;i--;x.fillRect(960+(X*w-S(i)*h)*H,H+(Y*w-Z*h)*H,d=(Z*w+Y*h)*5+9,d))X=C(o=i/82),Y=C(i)*S(o),Z=S(i)*w+X*h

Mar 12 2017 5:11 AM UTC

}// 140/140

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u/donbright

!!!
u/FireFly

Looks like a cushion!
u/username

pillow

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hypothete

function u(t) {

f=Math.random;z=f()*500;x.globalCompositeOperation='xor';x.beginPath();
x.arc(f()*1920,f()*1080,z,0,Math.PI*2);x.fill();

Mar 11 2017 2:15 AM UTC

}// 120/140

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hypothete

function u(t) {

w=t;v=30;x.fillRect(0,0,v,5);x.translate(v,0);x.rotate(w);

Mar 11 2017 1:59 AM UTC

}// 58/140

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u/FireFly

Very nice spirals!
u/hypothete

I wish I had a better understanding of how they worked, this one is just dumb luck. :P

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donbright

remix of d/2033 by u/recursive

function u(t) {

t||(a=0)
x.drawImage(c,C(a+=S(t/155*C(t)))*20,S(a)*20)
x.fillRect(1e3,500,20,20);
x.fillStyle=R(128*S(a)+128,(C(a)*256)%256,(250-a)%250)

Mar 11 2017 1:17 AM UTC

}// 137/140

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actually a remix of two... recursive's 2033 and https://www.dwitter.net/d/2008 by RavenWorks

u/sfz

wowweewowowo
u/RavenWorks

this is great!!
u/recursive

Whoa, you went in a totally different direction with this.

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rpearl

function u(t) {

for(i=v=540,j=50,x[r='fillRect'](0,0,v*4,v*4);i--;)x[r](960+C(a=i*3.883)*i,v+S(a)*i,9,9,x.fillStyle=`hsl(${h=t*i},99%,${j*S(h/j)}%)`)

Mar 10 2017 11:21 PM UTC

}// 133/140

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I'm mostly just obsessively golfing the one cool demo I did and using the excess characters to add cool things... I should figure out more demos

u/donbright

this is joyous
u/FireFly

It's super pretty!
u/sigveseb

Super stylish!

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@literallylara

function u(t) {

c.width=1920
R=_=>S(s)+(S(s++)>0?0:1)-.5
for(s=i=H=540;i--;)x.fillRect(a=960+(R()*C(t)-R()*S(t))*H,b=H+R()*H,20,20),x.lineTo(a,b)
x.stroke()

Mar 10 2017 9:11 PM UTC

}// 140/140

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Show more comments…
u/sfz

that is so cool
u/donbright

woah! Tensegrity?
u/donbright

this is so much genius!!!
u/lsh

This is amazing!
u/aemkei

Whaa! Cool 3D effect!
u/donbright

loose remix https://www.dwitter.net/d/2112
u/donbright

re-remix https://www.dwitter.net/d/2468
u/donbright

oops i mean https://www.dwitter.net/d/2469

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@literallylara

function u(t) {

if(!window.i)c.width=300,i=[j=102,j]
for(k=50;k--;)t<3&&x.fillRect(...i=i.map(v=>v+(j=(j*-5.2877+6.1341*v+3.1346)%4-2)),1,1)

Mar 10 2017 7:55 PM UTC

}// 124/140

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u/sfz

Nice, trying to figure out how to make it stay in canvas bounds
u/aemkei

searching for the right seed …
u/donbright

awesome awesome awesome aweseom

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aemkei

function u(t) {

c.width^=0;for(Y=12;Y--;)for(X=12;X--;)(1<<X)&[,396,82,66,76,80,76][Y]||x.fillRect(1190-X*50+S(t+X/10)*30,700-Y*50+C(t*3+X/4)*30,36,36)

Mar 10 2017 7:55 PM UTC

}// 135/140

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u/donbright

lol i salute this flag
u/joeytwiddle

#flag
u/atgz

#logo

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kchplr

function u(t) {

for(i=99;i--;A=T%6.35,r=50+((T/6.35|0))**1.05*10,r+=C(T*8-r)*r/10,x.fillRect(960+S(A)*r-r/84,540+C(A)*r-r/90,2+r/42,2+r/45))T=t*9+i/99

Mar 10 2017 8:09 AM UTC

}// 134/140

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u/jsizzle

Beautiful
u/stiaje

Seems to require chrome or Firefox 52 due to exponentiation operator :(
u/Xen

77byte Remix #2939
u/FireFly

I love it

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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

dwitter.net | FireFly (5986)