Hot dweets by u/donbright

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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donbright

remix of d/2238 by u/aemkei

function u(t) {

r=500;c.width^=0;
t?φ.push(t):φ=[]
φ.map(φ=>{
x.fillStyle='hsl('+r*C((λ=φ*r)/2)+',99%,50%)'
x.fillRect(C(φ)*S(λ+t)*r+999,S(φ)*r+r,9,9);
})

Mar 21 2017 10:52 PM UTC

}// 138/140

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progressive trance planet

u/sfz

Morten Granau works love it

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donbright

remix of d/1399 by u/Kalanchoe

function u(t) {

c.width^=0
t?o.push({X:1e3,Y:500,U:S(t*t),V:C(t*t)}):o=[]
o.map(a=>{a.X+=a.U,a.Y+=a.V,x.fillRect(a.X,a.Y,9,9)})

Mar 16 2017 7:25 AM UTC

}// 111/140

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inspired by Todd Hopkinson http://codegolf.stackexchange.com/questions/…

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donbright

remix of d/1399 by u/Kalanchoe

function u(t) {

c.width^=0
t?o.push({X:1e3,Y:500,U:9*S(t),V:t%9}):o=[]
o.map(a=>{a.X+=a.U+=a.X>1e3?-.1:.1,a.Y+=a.V+=a.Y>500?-.1:.1,x.fillRect(a.X,a.Y,9,9)})

Mar 15 2017 12:03 AM UTC

}// 140/140

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donbright

remix of d/2025 by u/@literallylara

function u(t) {

c.width^=余=C(t),正=S(t)
t?o.push({X:余+2,Y:5+正,Z:1}):o=[]
o.map((a)=>{({X,Y,Z}=a),a.X=余*X-正*Z,a.Z=余*Z+正*X,x.fillRect(1e3+X*99,Y*99-Z*33,3,3)})

Mar 14 2017 2:34 AM UTC

}// 140/140

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also inspired by @Kalanchoe https://www.dwitter.net/d/1399

u/sfz

mmmm... spinny hyperdonut... drooool
u/donbright

fun fact.. i spent the most hours on this dweet and it has the lowest score of all my dweets lol
u/codeslaw

It's dope!

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donbright

remix of d/2033 by u/recursive

function u(t) {

t||(a=0)
x.drawImage(c,C(a+=S(t/155*C(t)))*20,S(a)*20)
x.fillRect(1e3,500,20,20);
x.fillStyle=R(128*S(a)+128,(C(a)*256)%256,(250-a)%250)

Mar 11 2017 1:17 AM UTC

}// 137/140

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actually a remix of two... recursive's 2033 and https://www.dwitter.net/d/2008 by RavenWorks

u/sfz

wowweewowowo
u/RavenWorks

this is great!!
u/recursive

Whoa, you went in a totally different direction with this.

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donbright

remix of d/1863 by u/SpecialAgent

function u(t) {

c.width=1024;w=64;for(i=w*w;i--;)X=i%w,Y=i/w>>0,P=128*((1-t*t)*X*X/(1+t*t)+2*t*Y*Y/(1+t*t)),x.fillRect(200+X*10,Y*10,P%11,P%11)

Mar 11 2017 2:03 AM UTC

}// 129/140

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No Sine or Cosine were harmed in the making of this demo. It is not random - and if it runs long enough it should theoretically become a still image

u/sfz

Those ripples are tripping me out
u/donbright

note to future self - this varies from x*x + y*Y to x*x-y*y (circle to hyperbola) by using the rational parameterization of the circle with one variable parameter, where (1-t**2)/(1+t**2) is an alternate to cosine and 2t/(1+t**2) is an alternate to sine. (or vice versa i forget lol)
u/magna

Awesome!
u/z3vin

So cool

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donbright

remix of d/2001 by u/jonbro

function u(t) {

W=(p)=>(p<0?-p:p)%256
for(i=1920;i-=16;)for(j=1080;j-=12;)p=C(t/3)*i*i+S(t/9)*j*j,x.fillStyle=R(W(p/5),W(p/9),W(p/3)),x.fillRect(i,j,16,12)

Mar 10 2017 1:25 AM UTC

}// 139/140

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remixing jonbro and netgrind 's use of color in circle / square style patterns. added some hyperbolas. longer you stare at this the weirder the patterns get - it doesnt' repeat for quite a long time

u/SpecialAgent

This is very hypnotic

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donbright

remix of d/1969 by u/jes5199

function u(t) {

c.width=2e3;g=new Float32Array(1);for(a=192;a;a--)for(b=99;b;b--){C=(a-96)*t;d=(b-54)*t;v=C*C+d*d;g[0]=v;v-g[0]>0?x.fillRect(a*9,b*9,9,9):0}

Mar 9 2017 12:43 AM UTC

}// 140/140

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animating some of jes5199 's circles-and-squares -ish patterns.

u/jes5199

cool! This particular pattern is based on this paper: http://www.cgl.uwaterloo.ca/csk/projects/ali…
u/donbright

thanks for linking that, very very interesting.
u/donbright

#Aliasing

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donbright

remix of d/1871 by u/walsh9

function u(t) {

圈=(n,d,N,D)=>{d+D<15?(圈(n,d,n+N,d+D),圈(n+N,d+D,N,D),w=2e3,m=d+D,x.beginPath(),r=w/m/m/2,x.arc(w*(n+N)/m,r,r,0,7),x.fill()):1}
圈(0,1,1,1)

Mar 7 2017 11:35 PM UTC

}// 136/140

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basic Ford's Circles (sort of like Apollonian Circle Packing but every circle touches the floor, or here, the ceiling)

u/donbright

#math
u/donbright

see also https://www.dwitter.net/d/15086 by @taupelink
u/donbright

#numbertheory
u/taupelink

nice!

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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.

Show more comments…
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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