Top 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.

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Current theme challenge: #Opposites

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donbright

function u(t) {

c.width=900;半=450;for(i=0.0;i<360;i+=1){x.lineTo(半+C(i*t/10)*i,半*9/16+S(i*t/10)*i)};x.stroke();

Feb 22 2017 2:31 AM UTC

}// 95/140

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Show more comments…
u/lionleaf

Starts off nice looking and becomes extremely trippy and hypnotic!
u/inviso

mesmerizing
u/ilSilvano

wow that escalated quickly.
u/elanimus

someone tell me how to run this please
u/Xen

Golfed and tweeked, #2909 ;-)
u/sparr

This is a browser glitch, right? It only looks cool because the browser starts using too few segments to draw the spiral. Would be boring in a fixed browser.
u/Haabilo

@sparr Not really a glitch. The code uses lineTo as means to straw the lines. It also sets the maximum amount 5
u/Haabilo

...of the segments. Damn, I didn't think mistapping backspace on mobile would send the comment as-is...
u/ArtsyBiker1

Awesome
u/blackvitriol

welcome to time travels :)
u/hoppla1232

Sir Moire apprecetiates this
u/Freak

This is like one of those nightmares I have where everything keeps on getting faster and it scares me and I love it
u/joeytwiddle

This is for me the definitive dwitter dweet #spiral
u/geb

#background

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donbright

function u(t) {

c.width=2e3
for(i=0;i<t*t;i++){Φ=Math.acos(1-2*i/t/t)
Θ=10.1664*i
x.fillRect(
500*(2+C(Θ)*S(Φ)*S(t)+C(Φ)*C(t)),
500*(1+S(Θ)*S(Φ)),9,9)}

Sep 7 2018 4:57 AM UTC

}// 135/140

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Evenly spaced points on a sphere, based on CR Drost's phyllotaxis sunflower cylyndrical equal area map in python: https://stackoverflow.com/questions/9600801/…

u/joeytwiddle

Useful! #sphere
u/Odog8

Love me a PHI sphere in the morning!

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donbright

remix of d/3697 by u/Citiral

function u(t) {

w=1920;for(c.width=i=w;i-=10;)for(j=w;j-=10;){
d=(i*i+S(3.14*(i/w))*j*j)/frame
o=d%9
x.fillRect(i,j,o,o)}

Jan 2 2018 3:15 AM UTC

}// 105/140

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u/joeytwiddle

I was about to comment "donbright would like this one" but then suddenly ... !
u/magna

Wow!
u/Xen

one of my new fav's, love this!

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donbright

remix of d/2476 by u/keithclark

function u(t) {

onmousemove=e=>(T=e.pageX/99,R=e.pageY*5)
for(a=c.width^=0;a--;x.fillRect(C(a-T)/S(b)*h+960,C(b)*h+540,i=h/40-5,i))h=900/(2-S(a-T)*S(b=a/R))

Apr 14 2017 12:57 AM UTC

}// 140/140

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please move your mouse up/down/left/right inside the energy mushroom. (adding mouse to @keithclark 's globe, modded shape, w @Jenky for mous-piration)

u/gabrielsroka

#interactive

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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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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/2562 by u/hscells

function u(t) {

t?c.width=w:(k=1,w=1980,f=w/2)
onmousemove=e=>k=e.pageX/94+e.pageY/942
for(i=f;i>0;i-=k)x.lineTo(w/2+S(i+t/5)*f,540+S(i*5)*f/2)
x.stroke()

Apr 23 2017 12:37 PM UTC

}// 138/140

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move mouse left-right = coarse adjustment. move mouse up-down = fine adjustment

Show more comments…
u/donbright

challenge - can you find the tuning for a single, rotating parallelogram?
u/hscells

nice use of the mouse!
u/magna

SICK!
u/z3vin

Man, I thought it was cool even before I realized the mouse interactions!
u/donbright

well the default is just stealing from @hscells
u/Xen

thats sexy!
u/Xen

thats sexy!
u/donbright

thx
u/gabrielsroka

#interactive

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donbright

remix of d/3119 by u/Xen

function u(t) {

x.globalAlpha=.008
半=500
x.fillRect(0,0,i=w=2e3,w)
for(i=(3e3);i--;)x.clearRect(frame*(i*i-(j=t*i%frame)*j)/(b=j*j+i*i),999-2*i*j*i/b,2,4)

Aug 29 2017 9:24 PM UTC

}// 138/140

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thx Xen

u/Xen

Welcome ;-)
u/Xen

i just remixed your remix of my remix of your dweet, trying to message you, find me @xen_the
u/alien

wow

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donbright

remix of d/15061 by u/taupelink

function u(t) {

t||(a=[],s=r=k=0)
J=s-r+k
x.fillStyle=R(a[s+k]=k%r?a[J]+a[J-1]:1,a[J-1],a[J-2])
r<99&&x.fillRect(1e3-8*r+16*k,8*r+8,8,8)
++k>r&&(s+=++r,k=0)

Jul 24 2019 3:51 PM UTC

}// 140/140

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Pascal's funky triangle

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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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