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: #Food

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rodrigo.siqueira

remix of d/12001 by u/thorbear

function u(t) {

X=t/6;Y=2;s=999;x.globalAlpha=.05;for(i=3e3;i--;)
Y=1.66-2*(.1*X-S(1.2*Y)),
x.fillRect(X*s,Y*s-700,3,3)

Jan 31 2019 2:25 PM UTC

}// 103/140

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Bifurcation diagram attractor of the logistic map. xₙ₊₁ = r * xₙ(1-xₙ). Bifurcation diagrams enable the visualization of bifurcation theory. #fractal

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rodrigo.siqueira

function u(t) {

x.beginPath()
for(c.width^=i=0;i<3e3;i++)x.lineTo(X=540,X),x.lineTo(960+X*C(i/2),X+C(t+i+S(i/4+t))*360)
x.strokeStyle=`#0452`
x.stroke()

Jan 30 2019 9:35 PM UTC

}// 136/140

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Rotating curved surface

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rodrigo.siqueira

remix of d/11965 by u/pavel

function u(t) {

for(x.fillRect(0,0,i=3e3,i);Q=S(--i*i);x.clearRect(960+150*(S(b)*4+S(i+t)*Q),540+150*(C(i*i)-(t%4>2?T(b+t):S(b+t))),4,4))b=i%6+t+(t%2>1?0:i)

Jan 28 2019 2:40 PM UTC

}// 140/140

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Torus, spheres, flow and bubbles

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u/rnbw

now THIS is a demo!
u/katkip

Yeah he win
u/13thptr

woah
u/joeytwiddle

Superb! Golf the end with i*(t%2>1) or i*!(t&1)
u/rodrigo.siqueira

Thanks @joeytwiddle for the golf trick. i*(t&1) also works and it's even shorter. And I found that t%4>2?... can be converted to t&2?... It works as a counter to change the function each 2 seconds.
u/yonatan

Also, since T and S take the same arguments (t%4>2?T(b+t):S(b+t)) can be (t&2?T:S)(b+t)
u/lionleaf

Wow! Now we're talking
u/vain

Wow, three fx in this tiny code? Great!

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rodrigo.siqueira

remix of d/10314 by u/veubeke

function u(t) {

c.width^=0
s=(t%3)**3
x.font="2in'"
for(Y=9;Y--;)for(X=Y+1;X--;)x.fillStyle=R(Y*99,Y*27,0),x.fillText("▲",865+(X*48-Y*24)*s,(Y-4)*46*s+600)

Jan 1 2019 4:36 PM UTC

}// 139/140

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Expanding unicode triangles. German colors.

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u/katkip

German colors? I'm curious to see the Romanian ones.
u/lionleaf

#recursive
u/lionleaf

#zoom
u/username

seemless
u/username

<- this version is not
u/username

^ meant to use an up arrow

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rodrigo.siqueira

remix of d/11566 by u/ellisk1

function u(t) {

with(x)for(m=q=t*30|0;m-->q-90;fill(arc(960+(r=m**.2*60*S(m))*S(a=m**4),540+r*C(a),w*3,0,9)))beginPath(fillStyle=R((w=q-m)*2,0,0,1/w**1.48))

Dec 28 2018 6:18 PM UTC

}// 140/140

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Mutating blood cell on microscope

u/aleamb

great! #cell
u/rodrigo.siqueira

#blood #coronavirus #growth

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rodrigo.siqueira

function u(t) {

c.width^=0
x.fillRect(0,0,2e3,2e3)
k=t<3?80*t:240
x.fillStyle="#5e9"
for(i=1;i<=k;i=i+.2)x.fillRect(3e3*(i%1)+i*S(i+t)-k,k+i*3*C(i/600),5,9)

Dec 27 2018 3:18 PM UTC

}// 140/140

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Rotating Trees #christmas #tree

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rodrigo.siqueira

remix of d/11562 by u/echo85

function u(t) {

for(s=300,r=5/s,j=60*t*r-2,i=-3;i<2;i+=r)for(X=i,Y=j,T=9;T--;)U=X,X=X*X-Y*Y+i,Y=2*U*Y+j,x.fillStyle=R(Y,U,X),x.fillRect(i*s+4*s,j*s+2*s,5,5)

Dec 27 2018 2:02 AM UTC

}// 140/140

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Color Mandelbrot Set

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rodrigo.siqueira

function u(t) {

eval(unescape(escape`昽渽㹻瀽渿昨渭ㄩ㩛ㅝ㭲整畲湛∱∮牥灥慴⠳⨪⡮⬱⤩Ⱞ⸮瀮浡瀨氽㹬⬢〢⹲数敡琨㌪⩮⤫氩嵽㭦⠴⤮景牅慣栨⡌Ⱪ⤽㹻䰮獰汩琨✧⤮景牅慣栨⡳ⱎ⤽㹻䴽琼ㄿ琺ㄻ砮晩汬剥捴⡎⨷⸹Ⱪ⩍⨹㤬䴪猪㠬㌶〩紩紩;`.replace(/u(..)/g,"$1%")))

Dec 25 2018 9:34 PM UTC

}// 140/140

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The Cantor Set #fractal

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rodrigo.siqueira

function u(t) {

c.width^=0
x.fillStyle="#ace"
for(i=0;i<170;i++){
 x.font=i/15+'em"'
 x.fillText('❄',S(t/25+i)*i*13,Math.abs(99*(t+i))%1190)
}

Dec 25 2018 6:01 PM UTC

}// 126/140

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Snow Falling

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rodrigo.siqueira

function u(t) {

F=n=>(f=(n,t=n&&f(n-1),r=t[0])=>n?[r+r+r,...t.map(x=>x+t[n]+x)]:['█','░'],f=f(n),f.pop(),f).join`\n`
throw(F(3))

Dec 24 2018 10:15 PM UTC

}// 112/140

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Cantor Set #fractal #unicode

u/katkip

haha nice

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