Dweets awesomed by u/joeytwiddle

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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LimeLaser

remix of d/15597 by u/LimeLaser

function u(t) {

X=s=>960+500*C(s*t)
Y=s=>540+500*S(s*t)
x.beginPath()
x.moveTo(X(1),Y(2))
x.bezierCurveTo(X(4),Y(8),X(16),Y(32),X(64),Y(128))
x.stroke()

Sep 1 2019 8:35 AM UTC

}// 136/140

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Curved Geometry Drawer (Alternative Version)

u/LimeLaser

I use the same values as last time, but treat them as scales rather than offsets.

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taupelink

remix of d/15591 by u/taupelink

function u(t) {

for(i=d=e=f=1e3;i--;x.fillRect(d*z,e*z,f,f))[d,e,f]=[1+(r=1+Math.random(z=170)*9|0)+f*C(d)/(q=r%3+r/20),f*(1-S(f)/3)*(2-C(d+f)),q+.1/f]

Sep 1 2019 12:34 AM UTC

}// 135/140

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d/15593

u/DataMeta

I see people with elaborate headgear facing away or robots facing us
u/tomxor

hah, same, but not the robots

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rodrigo.siqueira

remix of d/15559 by u/tomxor

function u(t) {

for(c.width=128,i=576;i-=1/16;x.fillRect(16*X,16*Y,Z,Z))
x.fillStyle=R(0,35,90),X=i%8,Y=i/128,
Z=1+C(20*T(Y+T(X*2))*C(X+T(Y*9))+t*4)**3/3

Aug 31 2019 12:58 AM UTC

}// 137/140

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Sea from above. #water

Show more comments…
u/jellyedwards

Amazing!
u/aleamb

YES!
u/aleamb

#realisti
u/aleamb

#realistic
u/tomxor

nice, sometimes the unfloored i/128 works in our favour, adds that overall gradient that makes it look like reflecting sky
u/katkip

nice
u/katkip

#tagfail
u/iverjo

Very nice water

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tomxor

remix of d/15534 by u/tomxor

function u(t) {

Z=_=>C(3*S(Y+C(X*3))+3*S(X+S(Y*3))+t*4)**3/6
for(c.width=i=1024;i-=1/16;x.fillRect(48*(X*2+Y+11),48*(X/2-Y+z),1,5))z=6-Z(X=i%8-4,Y=i/128-4)

Aug 28 2019 11:57 AM UTC

}// 139/140

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#lava

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tomxor

remix of d/15526 by u/mildlybean

function u(t) {

t*=2,Z=_=>C(3*S(Y)**2+3*S(X+t)*S(Y+X-t))**4/3
for(c.width=i=1024;i-=1/16;x.fillRect(48*(X*2+Y+11),48*(X/2-Y+z),1,5))z=6-Z(X=i%8-4,Y=i/128-4)

Aug 27 2019 8:22 AM UTC

}// 140/140

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Had been keeping this function around for a while but no use for it, it's just strange.

u/tomxor

... each blob doesn't actually propagate, but gives the illusion it does.
u/katkip

looks great
u/katkip

#waves

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rodrigo.siqueira

remix of d/15526 by u/mildlybean

function u(t) {

Z=_=>S((Y*Y+X*X)*S(t))
for(c.width=i=1024;i-=1/8;x.fillRect(48*(X*2+Y*C(t)+11),48*(S(t)*X/2-Y*S(t)+z),1,5))z=6-Z(X=i%8-4,Y=i/128-4)

Aug 26 2019 11:18 PM UTC

}// 131/140

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Rotating sombrero. Remix from @tomxor https://www.dwitter.net/d/15530 , faster, smaller. Now the surface also rotates.

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mildlybean

function u(t) {

Z=(X,Y)=>S(X*Y/999+t*9)*9
c.width|=0;for(i=-64;++i<64;)for(j=-64;++j<64;x.fillRect(960+i*d,540-.7*(j+h)*d,3,3))d=3e3/(400+.7*(j-(h=Z(i,j))))

Aug 26 2019 1:51 PM UTC

}// 140/140

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It will graph any equation you put on the first line. Give it a try, I'd love to see your remixes!

Show more comments…
u/mildlybean

S((X*X+Y*Y)**.5/4-t*16)*16 is interesting
u/tomxor

Neat! #application , shameless plug to my old retro version: d/12669
u/tomxor

yours has a much nicer resolution: Z=(X,Y)=>S((X*X^Y*Y)**.1-t*8)*16
u/katkip

Z=(X,Y)=>S(X/9*C(t)+Y/9*S(t))*9 is cute
u/tomxor

moire: Z=(X,Y)=>t
u/katkip

Any formula has a moire actually
u/mildlybean

Especially (X+Y)%2==0?0:S(t*2)*50

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pavel

remix of d/15511 by u/katkip

function u(t) {

with(x)for(c.width|=i=7,translate(960,540);i--;fillRect(-2e3,-2,4e3,4))rotate(q=Math.PI/7),beginPath(fill(arc(S(t+i*q)*500,0,50,0,7)))

Aug 25 2019 2:28 AM UTC

}// 134/140

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u/aleamb

relaxing!
u/katkip

thx for more precision

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katkip

function u(t) {

c.width|=0;x.translate(z=960,540);for(i=7;i--;x.fillRect(-z,0,2e3,4))x.beginPath(),x.fill(x.arc(S(t+i*1.68/4)*500,0,50,0,7)),x.rotate(.45)

Aug 24 2019 12:27 PM UTC

}// 138/140

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That #illusion that everybody knows but not very precise because of golfing. https://media1.tenor.com/images/4ba3468dfd7f…

u/aleamb

relaxing!

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rodrigo.siqueira

function u(t) {

η=.1
ℵ=1/t
for(X=-3;X<3;X+=.01){
y=X**3-X*2
ℵ=ℵ-η*(ℵ**3-2*ℵ)
x.fillRect(940+X*400,-y*100+500,5,5)
}
x.fillRect(910+ℵ*400,470,60,60)
throw(ℵ)

Aug 21 2019 1:45 PM UTC

}// 140/140

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Gradient Descent (iterative) algorithm used to calculate sqrt(2). The big dots are the two roots -sqrt(2) and +sqrt(2) of equation Y=X**3-X*2. The Gradient Descent is an optimization algorithm for finding a local minimum of a function near a starting point, taking successive steps in the direction of the negative of the gradient. x[n+1]=x[n]−η(∇f)xn where η is the "Learning Rate". Gradient Descent is widely used for training Machine Learning models. #neural #ai

u/rodrigo.siqueira

Simple version that calculates sqrt(2). If you change initial "x" to -1, it will converge to -sqrt(2), that is the other root of the equation Y=X**3-X*2. Code: x = 1; learning_rate = .1; for(i=0;i<50;i++) { x = x - learning_rate * (x**3 - 2*x) } throw(x);

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