Dweets awesomed by u/KilledByAPixel

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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Current theme challenge: #Food

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Agnes

remix of d/9088 by u/firegodjr

function u(t) {

F=n=>C(n)^T(n/t|0);x.drawImage(c,0,l=9);for(j=214;j--;)x.fillStyle='#'+F(j+t*60^-t*60+j).toString(16).padStart(3,'0'),x.fillRect(j*l,0,l,l)

Aug 4 2018 10:24 AM UTC

}// 139/140

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Fractal Metropolis 1972

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u/katkip

Wow
u/joeytwiddle

Looks so cool and cyber, then come silly green smiley faces
u/katkip

That actually looks like a GOL
u/iverjo

Wow! Interestingly, this is the result of a long remix chain
u/fujimotos

The loop starts here: d/8940
u/donbright

i want a sweater like this
u/tomxor

I love this one!

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katkip

remix of d/8981 by u/geb

function u(t) {

F=n=>{return T(n*n)<22/7}
x.drawImage(c,0,l=10)
for(j=214;j--;)x.fillStyle=F(j|t*40)?"#000":"#0f0",x.fillRect(j*l,0,l,l)

Aug 1 2018 9:05 PM UTC

}// 120/140

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#Sierpinsky #fractal #city

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joeytwiddle

remix of d/8414 by u/joeytwiddle

function u(t) {

t=9+t/5e2;for(c.width|=0,i=4e3;i--;x.beginPath())x.globalAlpha=.05,x.arc(S(i*i/1e4*t)*i/3+960,C(i*i/1e4*t)*i/4+540,i/30+2,0,7),x.fill()

Aug 1 2018 2:30 AM UTC

}// 135/140

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Eye of the storm #heavy

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u/aleamb

wow!
u/iverjo

This is so cool! Also, in fullscreen it looks like the innermost part of the storm is slowly rotating clockwise #opticalillusion
u/katkip

#storm #clouds
u/magna

This is nuts!
u/Xen

Love It!
u/lionleaf

Times out on my phone. We should increase the timeout limit somewhat
u/joeytwiddle

In the end, we did!
u/joeytwiddle

Many of the start points exhibit patterns, e.g. t=98.99+t/2e2
u/vain

WTF? Amazing!
u/joeytwiddle

This was a happy accident. I was drawing a spiral, and thought "What if the arms rotate with i*i instead of i?" Of course, this makes the outer points spin faster, and distributes the points semi-randomly.

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Agnes

remix of d/8945 by u/firegodjr

function u(t) {

F=n=>{return C(n)*C(n)+S(n)*S(n)<1}
x.drawImage(c,0,l=10)
for(j=214;j--;)x.fillStyle=F(j^t*60)?"#0f0":"#000",x.fillRect(j*l,0,l,l)

Jul 28 2018 8:15 PM UTC

}// 130/140

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Visualising numbers for which sin(x)*sin(x) + cos(x)*cos(x) < 1.

u/donbright

wait wait wait wait wait.... sin^2 + cos^2 = 1. im so confused. is this about the imprecision of floating point arithmetic?
u/donbright

this is absolutely fascinating... set it ==1 or >1 gives different patterns.
u/donbright

also fun... return S(n)/C(n)==T(n)

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fujimotos

function u(t) {

c.width|=0
for(i=9;i--;)for(j=20;j--;)n=j+i*5+t*5-68,x.fillStyle=`hsl(${i*99},80%,${n*4}%`,x.fillRect(400+i*100,400+j*10+2**n,50,10)

Jul 27 2018 12:49 PM UTC

}// 132/140

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Now everything is gone.

u/lionleaf

#default
u/BirdsTweetCodersDweet

I don't feel so good... :P
u/katkip

Thanos Car

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firegodjr

function u(t) {

F=n=>{for(i=n;i-->2;)n=n%i==0?0:n;return n>1}
x.font="5em x"
x.fillStyle=R(F(X=t|0)?255:0) 
x.fillText(X,X%9*90+550,X*10+90)

Jul 26 2018 7:35 PM UTC

}// 124/140

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Little prime generator :P

u/Xen

wow! very nice
u/firegodjr

Thanks! :D #prime

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robbyg

function u(t) {

for(j=20,h=96;h--;)for(v=54;v--;)x.fillStyle=R(z=(T(t-h*v)+1)*j,z/2,z*4),x.fillRect(h*j,v*j,j,j)

Jul 16 2018 6:34 PM UTC

}// 96/140

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u/DataMeta

I love it!
u/aleamb

awesome!

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keithclark

remix of d/8806 by u/keithclark

function u(t) {

for(Z=L=52,c.width=L*4;Q=Z--/9;)for(Y=X=L;X>-L;x.fillRect(X--/Q*9+99,L+U/Q,9/Q,L))Y+=7*C(X/2^Q*2+t*9),x.fillStyle=R(U=Y<L?Y:L,Q*L+U,U/L<<8)

Jul 9 2018 10:15 PM UTC

}// 139/140

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Managed to create a flat sea. Had to trade off the nice distance fog effect.

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u/joeytwiddle

Awesome infinite #landscape
u/lionleaf

Amazing!
u/jylikangas

Love it! Well done!
u/iverjo

Wow!
u/lionleaf

#minecraft
u/zanella

Replace Y<L?Y:L with Y and you'll understand how the flat sea effect was achieved. Nice one. ;)
u/Conjuror

love it
u/vain

OMG - really hot shit :D

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nabbydude

remix of d/8811 by u/nabbydude

function u(t) {

x.fillStyle=R(a=w*!x.getImageData(...P).data[0])
d+=!a||3
x.fillRect(...P)
P[j=d%2]+=(d%4<2||h*w-1)*5
P[j]%=(j?h:w)*2}{P=[d=w=960,h=540,5,5]

Jul 5 2018 4:27 PM UTC

}// 140/140

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Golfed my Langton's ant enough to fit in some scaling

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u/nabbydude

(and fix the aspect ratio)
u/aleamb

#cellular #automaton
u/alien

Hi there what is this part doing a=w*!x. ? :)
u/BalintCsala

@alien I think that gets the image data at the current position and if it's red, makes the fillStyle black and vice-versa
u/nabbydude

@alien @BalintCsala is right, x.blahblah is 0 if the pixel is black and 255 if its red, inverting it makes 0 into 1 and 255 into 0, and then we multiply by w because its a big number (>255) to make the color more visible
u/nabbydude

@alien @BalintCsala is right, x.blahblah is 0 if the pixel is black and 255 if its red, inverting it makes 0 into 1 and 255 into 0, and then we multiply by w because its a big number (>255) to make the color more visible

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fujimotos

function u(t) {

c.width=320
for(j=12;j--;)for(i=90;i--;)
x.fillStyle=`hsla(99,${i}%,${i}%,.9`,
x.fillRect(S(t+i/30+S(j))*20+20*j,S(t*5+i/10)+i*2,i/2,i/2)

Jul 4 2018 1:09 PM UTC

}// 137/140

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Weird Plants

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