Top dweets by u/IV

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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remix of d/2535 by u/magna

function u(t) {

t||(g=(n=c.cloneNode()).getContext`webgl`)
with(g)clearColor(0,S(t),C(t),1),clear(16384);
x.drawImage(n,0,0)

Jul 24 2020 5:14 AM UTC

}// 108/140

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safer for editing #webgl

u/IV

manga's original is grand, this is safer than my previous attempt in terms of editing and not getting errors which cause a reload :)
u/IV

the prblem with this is that youd have to clear both contexts which costs more bytes

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remix of d/676 by u/mxfh

function u(t) {

d=x.getImageData(0,0,w=c.width=256,h=c.height=128)
for(i=0;i<h;i++)for(j=0;j<w;j++)d.data[(i*w+j)*4+3]=(i*j%w)*t%w
x.putImageData(d,0,0)

Jul 22 2020 5:33 PM UTC

}// 137/140

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moire pattern = (i*j%w)*t%w original sierpinskies = (i-j&j+i)*t%w

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remix of d/2767 by u/jick

function u(t) {

g='globalCompositeOperation';
(T(t)<.5)?x[g]='xor':x[g]='copy'
r=Math.random;W=c.width;H=c.height;
x.fillRect(r()*W,y=r()*H,a=r()*W/6,a)

Jul 21 2020 10:00 PM UTC

}// 136/140

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#xor

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remix of d/19463 by u/Billedluh

function u(t) {

x.font="30em'",x.fillRect(0,0,w=2e3,w),t*=2
for(i=1;i<5;i++)x.fillText('👻👻',100*t%w+500*C(t+5*i)-300,700+15*(7*S(t*i)))

Jul 21 2020 4:03 AM UTC

}// 119/140

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#text

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remix of d/19470 by u/IV

function u(t) {

r=Math.random;s=r()*224;w=c.width/s;h=c.height/s;
for(i=1e2;i--;)
x.fillStyle=R(s,s*r(),0,r()/2),
x.fillRect(r()*w*s,r()*h*s,s,s);

Jul 24 2020 5:32 PM UTC

}// 131/140

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from monet to klimt

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function u(t) {

t||c.replaceWith(g=c.cloneNode());
with(g.getContext('webgl'))(clearColor(C(t),0,S(t),1),clear(16384))

Jul 24 2020 3:02 AM UTC

}// 102/140

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testing remix of d/1948

u/IV

correction: remix of d/19498. The problem with this is in replacing the canvas. Any attempt at a remix will fail to get the context. But it is shortest :D
u/nikoloffgeorgi

u/IV that's really cool. i wonder if anything beyond animating the color uniformly can be done within 140 chars
u/IV

nothing you cant do better with the canvas. try this: with(c.getContext('webgl'))(enable(0x0C11),scissor(i,i,i,i),clearColor(C(t),S(t),t,1),clear(16384))
u/IV

what we need is a glitter, with a quad shader set up and then we can play with 140 chars of a fragment main
u/IV

u/nikoloffgeorgi game-on! i did this: d/19541

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function u(t) {

s=70;w=c.width/s;h=c.height/s;r=Math.random;
for(i=1e2;i--;){
x.fillStyle=R(128*r(),128*r(),255*r(),r());
x.fillRect(r()*w*s,r()*h*s,s,s);
}

Jul 21 2020 2:43 AM UTC

}// 140/140

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pixels

u/Billedluh

This is very impressionist
u/IV

now you mention it, Monet would call it colourful! Thanks for inspiring a theme :)

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remix of d/19511 by u/IV

function u(t) {

t||c.replaceWith(g=c.cloneNode());
with(g.getContext('webgl'))(enable(3089),scissor(t,Y=t*S(t),50,Y),clearColor(0,0,0,1),clear(16384))

Jul 27 2020 4:13 PM UTC

}// 134/140

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bouncing #webgl

u/IV

drop in a t*=3; to hurry it up. change "with(g." to "with(c, " while remixing. change c back to g before posting.
u/IV

@nikiloffgeorgi
u/IV

139B: t||c.replaceWith(g=c.cloneNode());with(g.getContext('webgl'))(enable(3089),s=S(t),scissor(t,Y=s*s*t,50,Y),clearColor(0,0,0,1),clear(16384))

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