Dweets awesomed by u/DataMeta

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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metamero

remix of d/15479 by u/metamero

function u(t) {

throw T=~~T+1

Aug 21 2019 1:56 PM UTC

}// 13/140

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13B variable reuse init demo

u/taupelink

nice!
u/KilledByAPixel

tight, i was looking for something like this

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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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taupelink

remix of d/15465 by u/taupelink

function u(t) {

for(i=d=e=f=g=1e3;i--;x.fillText(r,d*z|7,z+e*z|7))[d,e,f,g]=[(r=Math.random(z=240)*9|0)+f*C(d+r),r%3+g*S(d+r),(r%2+f)/2,((r&4)/4+g)/(2+g)]

Aug 20 2019 4:34 AM UTC

}// 138/140

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Like d/15465, but with #chaosgame indices plotted instead of tiny rectangles

u/joeytwiddle

First I saw Deep Space 9 then I saw the planet Erp

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rodrigo.siqueira

remix of d/15411 by u/rodrigo.siqueira

function u(t) {

v=(a,b,Φ,r)=>{for(i=0;i++<r;x.globalAlpha=.05)x.fillRect(a-=S(Φ),b-=C(Φ),s=r/42,s)
r>8&&v(a,b,Φ+S(t*i**9)/4,r*=.9)}
v(960,540+300*C(t),t,99)

Aug 20 2019 1:03 AM UTC

}// 140/140

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Dendritic projections

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tomxor

remix of d/15454 by u/katkip

function u(t) {

a ++
throw a
}{a=1e3

Aug 19 2019 7:28 PM UTC

}// 20/140

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Variable initialisation with only +2 chars (hack)

u/tomxor

Saves up to 4 chars vs t||(a=1e3);
u/katkip

Ohh
u/katkip

#genius #exploit I didnt know about that. This is clever

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DataMeta

remix of d/15444 by u/DataMeta

function u(t) {

if(t++<8)for(i=2e3;i--;)Q=(h=i-960)*h/4e5-2,
x.fillStyle=R(l=t*i/18%232,S(t)*i/9,240-l),
x.fillRect(i+60,540+C(t+l/36)*l*Q,9,9)

Aug 18 2019 11:28 PM UTC

}// 127/140

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Smoothed curves, widened palette + golfed

u/DataMeta

#waitforit
u/joeytwiddle

It could be a colourful sea creature

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veubeke

function u(t) {

c.width=192
for(i=9;i--;)x.rect((4+i+S(t)*3)*10,40,5,20)
for(i=5184;i--;)x.fillRect(X=i%96*2,Y=(i/96|0)*2,W=x.isPointInPath(X,Y)+1,W)

Aug 18 2019 6:00 PM UTC

}// 133/140

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Overcomplicated default ;)

u/DataMeta

:] #default
u/katkip

!
u/joeytwiddle

Dwittendo!
u/Qwitter

nice

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DataMeta

function u(t) {

if(t<8)for(i=2e3;i--;)Q=(h=i-960)*h/4.2e5-2,
x.fillStyle=R(l=t*i/18%224,S(t)*i/11,224-l),
x.fillRect(40+i,540+S(t-l/18)*l*Q,10,10)

Aug 18 2019 5:11 AM UTC

}// 130/140

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#waitforit

u/13thptr

stylish

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taupelink

function u(t) {

s=x.fillStyle=['Orange','Tomato','Olive','Plum','Lime'][v=frame%5],x.font=(3+v)+'em"',x.fillText(s,960+90*(r=1+t/2)*C(w=t*12),540+50*r*S(w))

Aug 15 2019 2:21 AM UTC

}// 140/140

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Abstract fruit word spiral

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django

function u(t) {

w=c.width=1920 // clear the canvas
j=t*100
for(i=0;i<800;i++){
k=j*S(0.025*(t+i))
x.fillRect(w/2-100 -S(i/t)*k/4,t+2.5*i,k/2,2.5)
}

Aug 14 2019 8:30 AM UTC

}// 131/140

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oil slick

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