Hot dweets by u/magna

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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magna

function u(t) {

x.fillRect(960+960*C(t*3)-1,540+540*S(t*5)-1,2,2);x.filter='sepia(100%) invert(100%)';x.drawImage(c,10,10,1900,1060,0,0,1920,1080);

Mar 17 2017 8:18 PM UTC

}// 131/140

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#waitforit

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magna

remix of d/2176 by u/scottglz

function u(t) {

for(X=71;X--;)for(Y=39;Y--;)x.fillStyle=X<24&Y<21?Y%2|X-Y&3|!Y|!X|Y>18?'#00f':'#fff':Y/3&1?'#fff':'red',x.fillRect(X*25,Y*25+9*S(t+X),25,25)

Mar 18 2017 3:44 AM UTC

}// 140/140

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u/iverjo

#flag

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magna

remix of d/2172 by u/magna

function u(t) {

c.width=w=1920;h=1080;n=128;m=72;s=w/n;for(i=n*m;i--;X=((i+t/9)%(m*n))%n,Y=i/n,b=S(X*Y)**.5,x.fillRect(X/n*w,Y/m*h,b*s,b*s));

Mar 17 2017 5:52 PM UTC

}// 125/140

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magna

function u(t) {

c.width=w=1920;h=1080;n=128;m=72;s=w/n;for(i=n*m;i--;X=i%n,Y=i/n,b=S(X|Y)*C(t),x.fillRect(X/n*w,Y/m*h,b*s,b*s));

Mar 17 2017 4:53 AM UTC

}// 112/140

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Faux Sierpinski

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magna

remix of d/2170 by u/magna

function u(t) {

c.width=w=1920;h=1080;n=128;m=72;s=w/n;for(i=n*m;i--;X=i%n,Y=i/n,b=S(eval(`X${[...'|&^*'][t&3]}Y`))**.5,x.fillRect(X/n*w,Y/m*h,b*s,b*s));

Mar 17 2017 5:47 PM UTC

}// 137/140

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Carpet pattern explorer

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magna

function u(t) {

c.width=96;for(i=9;i--;x.fillRect(20+i*5+S(t)*15,20,2,10));(i=new Image).src=c.toDataURL().replace(t&9,0);try{x.drawImage(i,0,0)}catch(e){}

Mar 7 2017 11:02 PM UTC

}// 139/140

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Requires Chrome

u/scottglz

That's scary, love it.
u/tapgiles

It's so AWESOME!!
u/magna

It doesn't glitch like it used to, probably after an update to Chrome's JPEG lib or something...
u/magna

#default #glitch

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magna

function u(t) {

n=64;for(j=n;j--;)for(i=n;i--;c=j<6&i<16?'@疄㖄ᖄ犜'.charCodeAt(j)-n&2<<i:S(t+=t*t|5),x.fillStyle=R(c*=255,c,c),x.fillRect(i*30,j*16,n,n));

Feb 28 2017 10:38 PM UTC

}// 135/140

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Live feed from Amazon Data Center - Feb 28, 2017

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magna

function u(t) {

(function u(t){
c.width=1920;x.font='38px Menlo,Consolas';
`(${u})(t)`.split('\n').forEach((s,i)=>x.fillText(s,0,++i*45+(C(t)+1)*666))
})(t)

Feb 27 2017 4:58 AM UTC

}// 140/140

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Quine

Show more comments…
u/Kalanchoe

Haha, clever!
u/vonzo

wut?
u/sfz

<3
u/jczimm

nice!
u/highfestiva

wtf! :)
u/magna

#quine

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magna

function u(t) {

n=64;W=1920/n;H=1080/n;p=t*t;for(j=n*n;j--;x.fillStyle=R(S(t/p*j)*S(t/p*j)*255,S(t/p++*j)*255,0,.05),x.fillRect((j&63)*W,(j>>6)*H,W,H));

Feb 28 2017 8:09 PM UTC

}// 136/140

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u/sfz

Mars landing

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magna

function u(t) {

c.width=w=3;t?x.putImageData(new ImageData(new Uint8ClampedArray(a),w,1),0,0):a=c.toDataURL().split('').map(k=>k.charCodeAt(0)).slice(0,w*4)

Mar 1 2017 3:35 AM UTC

}// 140/140

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Gradient from nothing

u/sigveseb

Can't explain that!
u/magna

PNG header FTW
u/iverjo

Wait what? This needs an explanation :D
u/magna

@iverjo I export the empty canvas as a PNG image. The PNG file has non-zero bytes (because it needs to have a header and a bare minimum content to encode the empty content) that I directly use as RGBA values for the canvas image data (the pixel array).
u/magna

#glitch

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