Top #Orbits dweets

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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donbright

remix of d/1755 by u/SpecialAgent

function u(t) {

n=frame
q=n%2?400:289.2
d=n%2?2*t:2*t/.61518
X=960+q*C(d),Y=540+q*S(d)
n%4?x.moveTo(X,Y):x.lineTo(X,Y)
x.stroke()
x.fillRect(X,Y,9,9)

Mar 3 2017 2:36 AM UTC

}// 133/140

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This shows the pattern traced by a line directly between the Earth and Venus as they orbit the sun. This pattern is pretty ancient, for example discussed in the book Quadrivum about the old academic relationships between art and science. This type of pattern may be helpful to appreciate the concept of Orbital Resonance in a planetary system.

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u/donbright

thx to https://nssdc.gsfc.nasa.gov/planetary/factsh… for the data
u/sfz

Fascinating
u/donbright

inspired by @SpecialAgent obvs!
u/SpecialAgent

This pattern is very pleasing to the eye, very nicely done!
u/sigveseb

This space stuff is nice!
u/Lazy1337

#cardioid
u/Lazy1337

#math
u/donbright

#venus #space #orbits

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pavel

function u(t) {

for(c.width|=i=99;S[u[t]=t]=x[t]=i--;x.fillRect(960+(u[i]+=S[i]-=u[i]/d),540+(x[i]+=C[i]-=x[i]/d),C[t++]=9,9))d=(u[i]**2+x[i]**2)**1.5/7e3

Feb 28 2019 5:17 AM UTC

}// 138/140

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#physics #orbit #orbits

u/pavel

Funky start due to lack of chars but quickly settles. Imagine a black hole in the middle.

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lifthrasiir

function u(t) {

x.lineWidth=5
x.globalAlpha=(3-t)/9
t<3&&x.setLineDash([t*t*9,10000])|x.arc(960,540,t*180,0,7)|x.stroke()

Mar 28 2022 4:23 PM UTC

}// 105/140

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#orbits

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katkip

function u(t) {

if(!t)x.translate(960,540);r=(a,b,d)=>{while(d-->-1&&a>3&&b>3)x.fillRect(a*S(a*a-b+d),b*C(b*b-a+d),10,10);r(a/1.5,b/1.5,t);}
r(960*2,540*2);

Oct 27 2018 3:54 PM UTC

}// 140/140

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#orbits solar system #recursive Not real time

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katkip

remix of d/2251 by u/donbright

function u(t) {

r=500;
t?φ.push(t):φ=[]
φ.map(φ=>{
x.fillStyle='hsl('+r*S((λ=φ*r)/99)+',99%,69%)'
x.fillRect(C(φ)*S(t/λ*99)*r+999,S(φ)*r+r,9,9);
})

Aug 23 2018 12:00 PM UTC

}// 131/140

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#Orbits in a #sphere

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