Dweets awesomed by u/Kalanchoe

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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khalkeus

function u(t) {

c.width^=0;for(j=0;j<10;j++)x.fillRect(960+C(t*j)*S(t)*500,C(j*t)*S(t*j)*250+540,9,9);

Feb 26 2017 10:02 PM UTC

}// 86/140

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PhocaZH

function u(t) {

e=(t%4-2);g=Math.abs(e);x.fillStyle='F00';y=400+-Math.sqrt(1-Math.pow(g-1,2))*150;a=-Math.acos(1-g);x.fillRect(900+e*150,y,9,870+a*150-y);

Feb 26 2017 9:42 PM UTC

}// 138/140

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u/lionleaf

#heart

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sigveseb

remix of d/1443 by u/sigveseb

function u(t) {

with(x)(F=a=>fillStyle='#'+a)('e22'),x.Q=fillRect,Q(0,0,W=2e3,W),F('fff'),Q(0,390,W,300),Q(500,0,300,W),F(228),Q(0,465,W,150),Q(575,0,150,W)

Feb 26 2017 8:58 PM UTC

}// 140/140

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u/highfestiva

Tiiiny, just like the average Norwegian intellect. ;-)
u/M1T0

got em
u/iverjo

#flag

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dh7

remix of d/1239 by u/dh7

function u(t) {

c.width=1920; /* Feel like I'm 12 */
for(i=0;i<7777;i++){
  r=(i/10)*C(i/t)
  x.fillRect(960+r*C(t+i), 520+r*S(t+i), 3, 3) }

Feb 26 2017 8:49 PM UTC

}// 124/140

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hamptonio

function u(t) {

c.width=2e3;q=y=.1;z=C(t);for(i=0;i<9e3;i++){q+=.2*(y-.15*S(3*q))-q/1e3;y+=(q-y+z)*.04;z+=-.28*y;x.lineTo(q*300+900,y*800+400);}x.stroke()

Feb 26 2017 7:20 PM UTC

}// 138/140

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A Chua circuit-like ODE with chaotic attractors

u/donbright

brilliant!

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irregularshed

function u(t) {

for(var h=0; h<1920; h++) {
var v=(t*60)%1080;var l=((h*h+v*v)/17)%256;x.fillStyle=R(l,l,0,1);x.fillRect(h,v,1,1);}

Feb 26 2017 6:36 PM UTC

}// 115/140

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Threw this together on my phone :)

u/SpecialAgent

beautiful!
u/sigveseb

very nice in fullscreen!
u/Tekmap

#moire

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HeyJD

function u(t) {

c.width^=0;r=480;for(θ=44/7;θ>0;θ-=.7/(C(t)+1))for(φ=p=11/7;φ>-p;φ-=1/r)x.lineTo((C(t)*S(φ)-S(t)*C(φ)*S(θ))*r+r*2,C(φ)*C(θ)*r+r);x.stroke()

Feb 26 2017 5:46 PM UTC

}// 140/140

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You can change the ".7" number to be a lower number like .2 to increase the number of segments in the sphere.

u/donbright

brilliant

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kchplr

function u(t) {

for(c.width^=0,i=1296;i--;X=i%48,Y=i/48|0,d=1-((X-24)*(X-24)+(Y-13)*(Y-13))/300,s=(200*S(t*C(d))*d*d)%45,x.fillRect(X*40-s/2,Y*40-s/2,s,s));

Feb 26 2017 3:48 PM UTC

}// 140/140

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u/sigveseb

I like this!
u/Kalanchoe

Somewhat reminds me of Halite: halite.io
u/iverjo

Nice technique!
u/KHymatim

Mmmmm

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donbright

remix of d/1399 by u/Kalanchoe

function u(t) {

r=Math.random
c.width^=0
t?o.push({X:1920*r(),Y:0,ẋ:0,ẏ:0}):o=[]
o.map(a=>(x.fillRect(a.X+=a.ẋ+=r()-0.5+S(t)/15,a.Y+=a.ẏ+=r(),15,15)))

Feb 26 2017 3:27 PM UTC

}// 135/140

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snowflakes

Show more comments…
u/Kalanchoe

oh, this is pretty!
u/Kalanchoe

Try setting initial y to y:-15 :)
u/iverjo

Speaking of snowflakes: https://www.dwitter.net/d/338
u/donbright

thanks. iverjo that is super cool! i wish i could figure out how to combine that with this.
u/sfz

Did it, but at 150 chars, will share remix if I can get it down to limit.
u/sfz

Eh, not the same subtlety, but this is what I've got https://www.dwitter.net/d/1479
u/sfz

New version where larger snowflaskes fall faster than smaller ones, but had to remove the random wind. https://www.dwitter.net/d/1520
u/donbright

nice
u/sfacci

confetti!
u/donbright

#particles

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Kalanchoe

remix of d/1395 by u/Kalanchoe

function u(t) {

r=Math.random
c.width^=0
t?o.push({X:r()*1920,Y:r()*1080,x:0,y:0}):o=[]
o.map(a=>(x.fillRect(a.X+=a.x+=r()-.5,a.Y+=a.y+=r()-.5,s=4*r(),s)))

Feb 26 2017 10:31 AM UTC

}// 139/140

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Fullscreen! Sometimes when my eyes aren't focused, I can see lights moving around just like this.

u/iverjo

Same here
u/donbright

snowflake remix https://www.dwitter.net/d/1414
u/donbright

tried using this technique in 3d https://www.dwitter.net/d/2112

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