Dweets awesomed by u/prawnwarp

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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Current theme challenge: #Opposites

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keithclark

function u(t) {

for(a=c.width|=l=C(t),m=S(t);a--;x.fillRect((d*l-e*m)*h+960,(g*l-f*m)*h+520,h/=50,h))d=S(a*92),e=S(a),f=C(a*.7),g=d*m+e*l,h=800/(3+g*m+f*l)

Apr 23 2017 11:33 AM UTC

}// 139/140

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A point cube spinning on two axis with perspective

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u/hscells

this is really nice
u/donbright

great job!
u/magna

Awesome!
u/cantelope

very nice!
u/joeytwiddle

#cube #dots
u/vain

damn cool

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prawnwarp

function u(t) {

c.width|=0;for(i=0;i<1920;i+=64){for(j=0;j<1080;j+=64){x.fillStyle=`hsla(${i*j},50%,50%,.3)`;s=S((t*j*.01+i))*64+64;x.fillRect(i,j,s,s);
}}

Apr 21 2017 1:53 PM UTC

}// 139/140

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u/magna

So pretty!
u/cantelope

you can omit the closing parenthesis for hsla and save 1 delicious byte :)
u/donbright

man this is nice

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prawnwarp

function u(t) {

c.width|=0;for(j=0;j<12;j++){for(i=0;i<10;i++){x.beginPath();x.moveTo(j*100,540);x.lineTo(960+500*C(t*i),540+500*S(t*i));x.stroke();}}

Apr 20 2017 3:16 AM UTC

}// 134/140

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u/donbright

interesting idea
u/joeytwiddle

If I look at the point, I see it coming out of the screen. But if I look at the back, I see it point away.

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prawnwarp

remix of d/2536 by u/prawnwarp

function u(t) {

c.width|=0;x.lineWidth=2;r=500;a=460;b=540;x.moveTo(a,b);for(i=2;i<128;i+=2){a+=C(t*i)*r/i;b+=S(t*i)*r/i;x.lineTo(a,b);}x.stroke();

Apr 20 2017 2:03 AM UTC

}// 131/140

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prawnwarp

remix of d/2529 by u/prawnwarp

function u(t) {

c.width|=0;x.lineWidth=2;r=500;a=960;b=540;x.moveTo(a,b);for(i=1;i<127;i+=2){a+=C(t*i)*r/i;b+=S(t*i)*r/i;x.lineTo(a,b);}x.stroke();

Apr 19 2017 12:14 PM UTC

}// 131/140

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prawnwarp

function u(t) {

c.width|=0;x.lineWidth=5;r=500;a=960;b=540;x.moveTo(a,b);for(i=1;i<23;i+=2){a+=C(t*i)*r/i;b+=S(t*i)*r/i;x.lineTo(a,b);}x.stroke();

Apr 19 2017 5:07 AM UTC

}// 130/140

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More iterations on the Fourier expansion

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prawnwarp

function u(t) {

function r(){return Math.random()*255;}a=960+960*C(t);b=540+540*S(t*.9);x.fillStyle=R(r(),r(),r(),.05);x.fillRect(a,b,1920-2*a,1080-2*b);

Apr 19 2017 2:51 AM UTC

}// 137/140

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magna

remix of d/1480 by u/magna

function u(t) {

c.width|=0
x.font='50px monospace';
(u+'')
.slice(0,t*3+S(t)*5)
.concat(t*2&1?'|':'')
.split('\n')
.forEach((s,i)=>x.fillText(s,0,++i*50))

Apr 18 2017 1:55 AM UTC

}// 138/140

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Pair programming nightmare

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u/joeytwiddle

that title made me Lol :D
u/sigveseb

:D
u/Jenky

That's a really clever illusion, love it
u/magna

Heh, thanks! Brought it down to 123 chars in hopes of adding occasional mistakes like skipped characters / typos etc., but couldn't immediately find a way. In case anyone wants to give it a shot: https://www.dwitter.net/d/2522
u/donbright

:o
u/Polyducks

Could you make a random function to skip odd spaces?
u/magna

It has to be a deterministic PRNG so that the places that are skipped are persistent. Otherwise, it would just look like a random flipping of characters. I thought about it, but couldn't immediately find a short solution.
u/Polyducks

That's a great point. Dwitter is such a mind twister!
u/highfestiva

Groovy baby!
u/magna

#quine
u/joeytwiddle

#funny

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Michael21

remix of d/1698 by u/FireFly

function u(t) {

t || x.translate(960, 540)
for (i=40; i--; x.rotate(S(t)))
 x.fillStyle = 'hsla('+i*t+',96%,50%,'+1/t+')',
 x.fillRect(v=i*20, v, i*t, i*t)

Mar 2 2017 5:42 PM UTC

}// 139/140

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u/sfz

so pretty

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pstefanlarsson

function u(t) {

c.width=1920;
for(i=0;i<100;i++){
a = i % 10;
b = Math.floor(i / 10);
x.fillRect(600+a*80, 140 + b*80, 60*C((a+b+1)*t), 60*S((a-b)*t))
}

Feb 28 2017 7:06 AM UTC

}// 136/140

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u/5Mixer

Woa trip. I love the patterns it makes.

dwitter.net | prawnwarp (551)