Top dweets by u/BriSeven

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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BriSeven

remix of d/286 by u/iverjo

function u(t) {

if(!t)r=1,X=960,Y=540,W=1920,H=1080;x.fillRect(X+=5*S(r+=S(t*r)/4),Y+=5*C(r),5,5),X=((X%W)+W)%W,Y=((Y%H)+H)%H

Jan 1 2017 12:58 AM UTC

}// 109/140

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u/iverjo

Clever PRNG trick
u/donbright

this is super brilliant, could really be combined with other stuff to make some cool things id think

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BriSeven

remix of d/559 by u/BriSeven

function u(t) {

for(i=0;i<1920;i+=1){x.fillStyle=(t|0)%2?"#FFF":"#000",x.fillRect(i*4,S(i*t*7919)*1080,8,8)}

Dec 26 2016 9:46 AM UTC

}// 92/140

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spot the pattern

u/iverjo

S(i*t*2246795327919) is kinda nice and smooth, with less patterns
u/iverjo

S(i*(t+9)*2246795327919) is even smoother (in the beginning)
u/donbright

these ones where you erase and re-draw are really interesting.

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BriSeven

function u(t) {

W=1920;H=600;c.width=W;X=t?X:[];for(i=W,w=W/i;--i;)X[i]=(((X[i]+Math.random()*64-32)%2e3)+X[i+1]||H)/2,x.fillRect(i*w,X[i],w,H)

Dec 24 2016 10:14 PM UTC

}// 127/140

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was going for a midpoint displacement algorithm like this: https://bitesofcode.wordpress.com/2016/12/23…

u/BriSeven

was going for a midpoint displacement algorithm like this: https://bitesofcode.wordpress.com/2016/12/23…
u/BriSeven

but ended up with this instead, and a double post, because I was actually trying to put two linefeeds in my comment.
u/lionleaf

Oh, so a double "return" tap will post the same comment twice? Let me give it a go.
u/lionleaf

Oh, so a double "return" tap will post the same comment twice? Let me give it a go.
u/lionleaf

Haha, yep. Thanks for the bug find :)

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BriSeven

function u(t) {

for(i=7e3;--i;)x.fillStyle=R((d=i%16*119)%256,d/1.4%256,d/7%256),m=i*t/900,n=i/90,x.fillRect(n*S(m)*30,n*C(m)*30,30,30);x.rotate(-1e-3);

Dec 23 2016 8:45 AM UTC

}// 136/140

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BriSeven

function u(t) {

!t?X=[]:0;for(i=99;i;)o=X[i],X[i]=(o+Math.random()*8-4)%2e3||1e3,x.fillStyle=R((d=119*i)%256,d/1.4%256,d/7%256,.5),x.fillRect(o,X[--i],8,8)

Dec 23 2016 12:45 AM UTC

}// 139/140

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u/iverjo

To save one character (avoid the exclamation mark), you can do t?0:X=[]; or X=t?X:[];
u/BriSeven

ah yes, thank you

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BriSeven

remix of d/530 by u/BriSeven

function u(t) {

r=Math.random;for(i=0;i<1024;i++)
x.fillStyle=R((d=(t%220*i/64)|0)%256,d/1.4%256,d/7%256),
x.fillRect((r()*1080&i)-(i/2)+1920/2,i*.9,2,2)

Dec 22 2016 4:08 AM UTC

}// 137/140

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u/iverjo

At first I didn't realise it was multicolor. It gets interesting after 20 seconds, when the green color crawls from the bottom, and other colors follow

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BriSeven

function u(t) {

r=Math.random;for(i=0;i<1080;i++)
x.fillStyle=R((d=119*(i/68|0))%256,d/1.4%256,d/7%256),
x.fillRect((r()*1080&i)-(i/2)+1920/2,i*.9,2,2)

Dec 22 2016 3:00 AM UTC

}// 135/140

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In case you're looking at this and wondering where the Sierpinsky pattern is coming from, it's here: &i

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BriSeven

remix of d/518 by u/BriSeven

function u(t) {

if(!t)X=[];s=2e3;m=100;i=s;while(i)o=X[i],X[i]=(o+Math.random()*80-40)%s||5e2, x.fillStyle=R(S(t)*m+m,0,0,1),x.fillRect(o,X[--i],5,5)

Dec 19 2016 12:50 PM UTC

}// 133/140

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hey lionleaf, dates are a bit funny. this is the last one i did after all the others but appears here chronologically before all the others.

u/BriSeven

no. wait. i was just looking at the hot section and not the new section
u/lionleaf

:)

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BriSeven

remix of d/28578 by u/BriSeven

function u(t) {

c.width*=1
c.style.filter="blur(9px) contrast(100"
b=(p)=>x.fillRect(i*p-((t%1)*p/100)*100,0,p/5,p*t)
for(i=0;i<90;i++)[73,135,137].map(b)

Oct 31 2023 2:56 AM UTC

}// 138/140

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Ooze

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BriSeven

remix of d/28572 by u/BriSeven

function u(t) {

c.width*=1
c.style.filter="blur(9px) contrast(100"
b=(p)=>x.fillRect(i*p+S(t*p/100)*100,400,p/5,p*5)
for(i=0;i<90;i++)[3,7,31,73,137].map(b)

Sep 30 2023 6:27 AM UTC

}// 140/140

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inverted flames

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