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/291 by u/iverjo

function u(t) {

t=t%4;if(t<.1)r=X=Y=0,W=c.width=960,H=540;for(i=W*4;i--;)x.fillRect(X=(X+S(r+=C(t*i*r))%W+W)%W,Y=(Y+C(r)%H+H)%H,A=5/(1+t*9),A)

Jan 1 2017 12:01 AM UTC

}// 126/140

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u/donbright

the gray scale is what makes this awesome

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BriSeven

remix of d/562 by u/BriSeven

function u(t) {

if(!t)a=1;for(i=0;i<1920;i+=1){x.fillStyle=(t|0)%2?"#FFF":"#000",x.fillRect(i*4,C(a)*t*100&1023,8,8),a+=C(t*i*a)}

Dec 30 2016 10:01 PM UTC

}// 113/140

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u/iverjo

Smooth

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BriSeven

remix of d/564 by u/BriSeven

function u(t) {

if(!t)d=X=Y=a=255.88;for(i=d|0;--i;)x.fillStyle=R(S(a)*d,C(a+t)*d,S(-a)*d,.1),x.fillRect(X=9*S(a)+X&(d*8),Y=9*C(a)+Y&(d*4),8,8),a+=C(t*i*a)

Dec 30 2016 9:51 PM UTC

}// 139/140

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it looks like if you keep an accumulator variable in a feedback loop, you can get C to produce more random looking results. (except for at the very start.)

u/BriSeven

a+=C(t*i*a)
u/iverjo

Nice. Related dweet: https://www.dwitter.net/d/291

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BriSeven

function u(t) {

if(!t)d=255.8,X=1,Y=1,a=1;for(i=d|0;--i;)x.fillStyle=R(S(a+t)*d,C(a)*d,S(-a+t)*d,.1),x.fillRect(X=S(a)+X%(d*8),Y=C(a)+Y%(d*4),8,8),a+=C(t*i)

Dec 28 2016 9:18 PM UTC

}// 140/140

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u/iverjo

Funky

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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) {

for(i=0;i<1920;i+=1){x.fillStyle=i%2?"#FFF":"#000",x.fillRect(i*4+S(t)*20,(t*t*t%(i*i))%997.997,8,8)}

Dec 25 2016 2:10 AM UTC

}// 102/140

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u/iverjo

Moiré
u/BriSeven

i actually posted this on accident looking for a cheaper way to get randomish looking numberss than Math.random()
u/iverjo

Good quest
u/iverjo

In some cases T(veryLargeConstant*x) or S(veryLargeConstant*x) can look random enough

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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

remix of d/548 by u/BriSeven

function u(t) {

for(i=750;--i;c=256)x.fillStyle=R((d=i%16*27)%c,d/19%c,d/3%c),m=i*(t+4e3)/1e3,n=10*i/200,x.fillRect(n*S(m)*30+960&2047,n*C(m)*30&1023,20,50)

Dec 23 2016 8:39 AM UTC

}// 140/140

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u/donbright

this made me lol

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BriSeven

function u(t) {

e=2e3;for(i=e;--i;)x.fillStyle=R((d=i%16*119)%256,d/1.4%256,d/7%256),m=i*t/100,n=10*i/200,x.fillRect(n*S(m)*30+1e3,n*C(m)*30+500,20,20)

Dec 23 2016 5:11 AM UTC

}// 135/140

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u/donbright

these colors are "lit" as the kids say
u/donbright

superb
u/joeytwiddle

really nice for a long watch

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