Dweets awesomed 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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New_Core

function u(t) {

b=a=c.width=500;for(i=a*5;i--;)g=i%(h=b+9*S(t))>h/2?0:b,x.fillRect(g+i%13*b*2-1*i*.6+(b*8*S(t*.5))%b*2,150+i*.05,b=20+i*.05,1)

Dec 31 2016 12:13 PM UTC

}// 126/140

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u/iverjo

Awesome :D
u/iverjo

This dweet reminds me of the Windows 3.1 chess background image: http://i.imgur.com/Zv5eBRk.png
u/New_Core

#checkerboard

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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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AndrewBetts

function u(t) {

u.a=++u.a||1;x.fillStyle=R(0,130*Math.random(),0,u.a/10000);r=u.a+40;for(i=0;i<1920;i++){x.fillRect(i,r,1,100);r+=(Math.random()-0.5)*10;}

Dec 23 2016 4:12 PM UTC

}// 138/140

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u/lionleaf

Nice field of grass (?)! Now we've got grass and water: https://www.dwitter.net/d/254 and water with a sun: https://www.dwitter.net/d/63
u/AndrewBetts

I was going for a misty forest look, but it's quite abstract so grass works too :)

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iverjo

remix of d/553 by u/iverjo

function u(t) {

a=13;for(i=0;i++<1e3;)s=45/(9-(t+i/99)%9),x.fillStyle=R((d=i*119)%256,d/1.4%256,d/7%256),x.fillRect(960+5*s*C(h=i*a+t),540+5*s*S(h),s,s)

Dec 23 2016 1:35 PM UTC

}// 136/140

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Play with the a variable

u/joeytwiddle

I did ask you asked! https://www.dwitter.net/d/3600

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iverjo

remix of d/109 by u/iverjo

function u(t) {

for(i=0;i++<1e3;)s=45/(9-(t+i/99)%9),x.fillStyle=R((d=i*119)%256,d/1.4%256,d/7%256),x.fillRect(960+5*s*C(i+t),540+5*s*S(i+t),s,s)

Dec 23 2016 1:29 PM UTC

}// 129/140

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