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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Opposites

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joeytwiddle

remix of d/1763 by u/New_Core

function u(t) {

c.onclick=_=>window.a||(a=new AudioContext,o=a.createOscillator(),o.connect(a.destination),o.start(),c.onmousemove=e=>o.frequency.value=e.x)

Apr 8 2017 8:22 PM UTC

}// 140/140

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Starts making noise if you click on the canvas. Hopefully you can silence it by going left, but no guarantees!

u/cantelope

"woooOOOOoooOOOO" :D
u/magna

It's a dweetheremin!
u/joeytwiddle

Yes it is :) More fun with a wider frequency range: o.start());c.onmousemove=e=>o.frequency.value=5*e.x
u/lionleaf

Haha, amazing! Fullscreen gives you a wider audio range :)
u/joeytwiddle

#audio #interactive

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mxfh

function u(t) {

c.width|=b=50
h=b-S(t)*b*5
for(e=6.283;e>0;x.lineTo(d*C(e-=.01)+h*C(s=d/b*e)+960,(d)*S(e)-h*S(s)+540))d=300-b
x.fill("evenodd")

Apr 7 2017 10:55 PM UTC

}// 127/140

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http://mathworld.wolfram.com/Hypotrochoid.ht…

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marc8

function u(t) {

c.width|=i=0
for(b=(m=80)+(f=m+(l=5*m));i<7;i++)"}P7WZOoQ_".charCodeAt(t%10)&2**i&&x.fillRect(i<3?m:i%2?0:f,i>4?b:i>2?m:i*f,r=i<3?l:m,f-r)

Apr 7 2017 1:23 PM UTC

}// 139/140

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u/magna

Awesome!

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nonce

function u(t) {

Q=210+~~(t*9)*160
U=(''+u).replace(/[^Q]+/,'')
I=U.split('\n')
N=I[~~(t*9)]
E=x.font='111px monospace'
  x.fillText(N,20,Q)

Mar 26 2017 6:03 AM UTC

}// 124/140

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u/Lazy1337

#quine

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recursive

remix of d/2281 by u/thespite

function u(t) {

w=c.width|=0
for(a=1920;a-=40;)
for(b=1500;b-=15;)x.fillRect(a,b+C(C(((a-C(t*1.3)*800-960)**2+(b-S(t)*200-540)**2)**.1-t*2)*6)*100-200,40,8)

Mar 26 2017 12:30 AM UTC

}// 140/140

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u/donbright

nice work

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nonce

function u(t) {

with(x)font='950px o',lineWidth=30,strokeStyle=`hsl(${t*50%360},99%,50%)`,setLineDash([9,3e3]),lineDashOffset=t*120,strokeText('I❤U',9,880);

Mar 25 2017 5:45 PM UTC

}// 140/140

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u/tapgiles

In Chrome, the text is too large, and the heart never shows up. Pretty awesome idea, though.
u/recursive

It shows perfectly for me in Chrome on Windows.
u/nonce

I so wish I could fix the font here. Sadly it has to go with whatever default font you have. If someone could golf this down by 4 chars we could do font='950px Arial'
u/New_Core

with(x)font='25cm Arial',lineWidth=30,strokeStyle=hsl(${t*50},99%,50%),setLineDash([9,3e3]),lineDashOffset=t*120,strokeText('I❤U',9,880);
u/joeytwiddle

#text

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z3vin

function u(t) {

r=(n)=>Math.random()*n;h=1080;w=1920;
for(i=0;i<1999;i++)x.fillRect(r(w),h/2*C(t)+h/2,3,6)
for(i=0;i<99;i++)x.clearRect(r(w),r(h),r(3),r(h))

Mar 25 2017 12:16 AM UTC

}// 140/140

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z3vin

function u(t) {

r=(n)=>Math.random()*n;h=w=1920;c.style.transform=`scale(${r(.1)+1})`
for(i=0;i<9;i++)x.fillRect(0,r(h),w,3);x.clearRect(r(w),r(h),r(9),h)

Mar 24 2017 11:59 PM UTC

}// 138/140

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u/donbright

weird!
u/donbright

in a good way
u/z3vin

@donbright ha thanks!
u/katkip

#

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donbright

remix of d/1816 by u/SpecialAgent

function u(t) {

t?Δ=[]:P=[99,0,0,0,1,0,0,.6]
for(Q=i=4;i--;)Q+=(Δ[i]=P[(2+i)%4]-P[i])**2/2
for(j=4;j--;)x.fillRect(P[i=j*2],P[i+1],2,2),P[j]+=P[j+4]+=Δ[j]/Q

Mar 24 2017 11:16 PM UTC

}// 140/140

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Quickstart - alter numbers in P for fun patterns. Long description - this is a simulation of two body gravitational motion using a simplified form of Calculus.

u/donbright

combine F=ma with F=GM1M2/R^2 except that G=1, M1=1, M2=1 and r^2 is r
u/donbright

Explanation here https://www.patreon.com/posts/simulating-in-…
u/donbright

oh btw P[x1,y1,x2,y2,xv1,yv1,xv1,yv2] where 1,2 = object 1,2, x,y=position, v = velocity initial
u/codeslaw

This is incredible!
u/donbright

#physics

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thespite

remix of d/2280 by u/thespite

function u(t) {

w=1920,h=1080,c.width=w,d=.5;for(a=-d;a<d;a+=.02)for(b=-d;b<d;b+=.02){x.fillRect((d+a)*w,(d+b+.15*C(10*Math.sqrt(a*a+b*b)-2*t))*h,40,10)}

Mar 23 2017 6:43 PM UTC

}// 137/140

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