Top dweets by u/rodrigo.siqueira

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: #Opposites

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rodrigo.siqueira

remix of d/13206 by u/pavel

function u(t) {

for(i=c.width|=h=1.6+(t<<1);Y=i--%3-1||S(i);x.fillRect(960+S(a+t)*800/r/z,540+Y*800/z,s=18/z,s))a=i%3?i:i*h,r=T(a%h+h/3),z=3+S(t)+C(a+t)/r

Apr 16 2019 2:27 PM UTC

}// 138/140

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Spin particles #d3

u/f8f82804

#perspective

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rodrigo.siqueira

remix of d/28148 by u/rodrigo.siqueira

function u(t) {

c.width|=c.style.filter=`invert(`
for(i=2e4;i--;x.fillRect(1100-C(K=1/a+S(i)+5**t/i)*880*a,380+S(K+S(t)/t)*540*a,1,t<9?9-t:0))a=(i**.6)%1

Jul 19 2023 9:42 PM UTC

}// 137/140

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Vanishing spiral #spiral

u/magna

AMAZING!!
u/Joachim

Wow!!!

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rodrigo.siqueira

remix of d/24975 by u/taupelink

function u(t) {

for(m=k=220;m--;x.fill())d=2**t**t/t,r=m*6%k,x.beginPath(x.fillStyle=R(r*t*t,r,k/t)),x.arc(960+r*C(z=m+C(m)/d)*t*1.2,520+t*r*S(z),m/d,m-d,m)

Feb 22 2022 2:18 PM UTC

}// 140/140

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Fire rose #flower

u/vain

cool !
u/rep_movsd

Amazing

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rodrigo.siqueira

remix of d/24908 by u/rodrigo.siqueira

function u(t) {

with(x)for(i=800;i--;fillRect(~setTransform(i,0,0,i,880+i+3*i*C(i),700+2*i*C(i/400)),~rotate(i/6+t/2),2,2))fillStyle=R(i/5,i/4,i/3,.07)

Feb 11 2022 12:45 PM UTC

}// 135/140

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Misty mountain fog #smoke

Show more comments…
u/tomxor

Simple but very effective!
u/aleamb

wow!
u/vain

OMG! It looks so great. Where do you guys get the ideas & math formulas from?
u/magna

O M G
u/rodrigo.siqueira

u/vain It is the combination of rotations, scaling and translations (setTransform) and transparent color (.07 opacity). I remix and play with parameters and all stems from u/pavel 's Underwater cavern: https://www.dwitter.net/d/18597 My previous dweets are also remix of it. The math formulas (sin and cos) are not the main thing, they just create some almost random numbers with cyclic properties. I can not predict the result only looking to the formulas. I remix and explore combinations and post when I find interessting results.
u/vain

u/rodrigo.siqueira Thank you for your feedback and the nice and detailed description. Keep on your nice work! ;-)
u/joeytwiddle

Beautiful! #cloud #mountain #scene

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rodrigo.siqueira

remix of d/24560 by u/ArthurThuczsec

function u(t) {

x.fillRect(x.globalAlpha=.5,0,2e3,2e3)
for(i=s=r=1e4;i--;)x.clearRect(S(K=i-t/4)*i/12+960,C(i-t+S(K))*i/90+540-T(i*i)/i*5e4,i%4+.5,2)

Dec 17 2021 1:29 PM UTC

}// 134/140

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Andromeda dance #starfield

u/ArthurThuczsec

very well done
u/stephanegeorget

Outstanding
u/cantelope

@rodrigo.siqueira i want to communicate with you about something. can you email me plz whitehotrobot@gmail.com thx.
u/jellyedwards

Amazing!
u/magna

So cool!

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rodrigo.siqueira

remix of d/23570 by u/rodrigo.siqueira

function u(t) {

for(Y=t/9-1,i=2e3;i--;x.fillRect(i,60*t,Z=C(W/30+t/3),Z))r=((X=i/540-1.8)*X+Y*Y)/69,W=(X*Y/r^X/r)+Math.random()*20

Dec 8 2021 4:43 PM UTC

}// 114/140

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Deep owl eyes

u/magna

Delightfully noisy

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rodrigo.siqueira

remix of d/23841 by u/rodrigo.siqueira

function u(t) {

for(c.width|=i=50;i--;)for(j=25;j--;x.fillRect(50*i,50*j,45,45))
o=(j/2)*9,x.fillStyle=R(p=o*C(i/7-3+S(j/2+t*9)/8)*20-S(t*2+j/9)*1e3,p/7)

Sep 14 2021 3:07 PM UTC

}// 137/140

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Animated Flames #pixel

u/UEZ

Looks very nice but it looks much better without the grid. ^^
u/Joachim

#fire

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rodrigo.siqueira

remix of d/21726 by u/rodrigo.siqueira

function u(t) {

c.width=1e3
x.lineWidth=.2
for(i=2e3;i--;x.arc(500+300*C(t),282+88*S(t),i,K=i**(1.13+t/1e5)-t/9,K));x.stroke()

Mar 1 2021 1:18 PM UTC

}// 110/140

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Rotating sketch ball with inside triangle

u/danny@hille.dk

Illuminati confirmed! 😮
u/Qwitter

that is good.
u/Qwitter

smell th e flower

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rodrigo.siqueira

remix of d/19882 by u/rodrigo.siqueira

function u(t) {

for(i=190;x.beginPath(),i--;x.fillStyle=`hsl(${t} 90%${S(i/9+t)*i}%)`,x.fill())x.arc(960+C(a=t+i)*(k=(1.05)**i),540+i*S(i),i*(k/999)**2,0,7)

Sep 10 2020 2:54 PM UTC

}// 140/140

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Spinning circles

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rodrigo.siqueira

remix of d/12440 by u/rodrigo.siqueira

function u(t) {

t||(a=b=0)
for(i=5e3;i--;)x.fillStyle=R(C(a)*200,S(a)*b/3,t*42),x.fillRect(960+b*S(a*.8),540-b*C(a*.8),1,1),a+=1.9*C(2.5*a)+C(t/5),b+=.00076

Jul 7 2019 9:15 PM UTC

}// 140/140

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Feigenbaum Flower. Homage to Mitchell Feigenbaum (1944-2019). He demonstrated the universal character of dynamical non-linear systems, which has made possible the systematic study of chaos. In 1975, using the small HP-65 calculator, he discovered that the ratio of successive distances between bifurcation events tends to a constant δ ≈ 4.66920... This "ratio of convergence" of period-doubling bifurcations is now known as the first Feigenbaum constant. #bifurcation #attractor #fractal #chaos #math

u/taupelink

This is a great tribute. RIP.
u/donbright

really nice
u/artfarnaa

Rodrigo - are you working full time on this fractal stuff? Super impressive if its only a hobby. Great work.
u/rodrigo.siqueira

#tribute

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