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/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%n,Y=i/n,b=S(X/Y+t*t),x.fillRect(X/n*w,Y/m*h,b*s,b*s));

Mar 17 2017 7:16 PM UTC

}// 111/140

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u/recursive

like a corn field from the drivers' seat

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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

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=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

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) {

x.fillRect(960,0,1,1,x.fillStyle='red');(i=new Image).src=c.toDataURL('image/jpeg');x.drawImage(i,5,0,1910,1088);x.filter='sepia('+S(t)*C(t)

Mar 1 2017 6:39 AM UTC

}// 140/140

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Requires Chrome

u/iverjo

Interesting technique
u/magna

Seems to be broken on latest version on Chrome.

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magna

remix of d/1655 by u/magna

function u(t) {

e=1e3;(i=new Image).src=c.toDataURL('image/jpeg').replace(eval(`/(.{${t%e+e}})./`),'$1');x.filter='sepia(.02';x.drawImage(i,-4,0,1928,1100);

Mar 1 2017 4:38 AM UTC

}// 140/140

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Requires Chrome

u/magna

Seems to be broken on latest version on Chrome.

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magna

remix of d/1654 by u/magna

function u(t) {

e=1e3;(i=new Image).src=c.toDataURL('image/jpeg').replace(eval(`/(.{${t%e+e}})./`),'$1');x.filter='sepia(.01';x.drawImage(i,-4,0,1928,1100);

Mar 1 2017 4:37 AM UTC

}// 140/140

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Requires Chrome

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magna

remix of d/1323 by u/magna

function u(t) {

e=1e3;(i=new Image).src=c.toDataURL('image/jpeg').replace(eval(`/(.{${t%e+e}})./`),'$1');x.filter='sepia(.02)';x.drawImage(i,0,0,1920,1100);

Mar 1 2017 4:00 AM UTC

}// 140/140

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Candy Falls - Requires Chrome

u/magna

Starting off with a blank canvas, I introduce some artifacts by damaging the JPEG export. And then the rest comes through an interesting interplay of JPEG artifacts and sepia filter artifacts, and stretching the image while pasting it back.
u/magna

Seems to be broken on latest version on Chrome.

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