Dweets awesomed by u/joeytwiddle

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: #Food

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Jenky

remix of d/2256 by u/sfz

function u(t) {

t=t%((r=Math.random)()*.6+.6)>.01||new Audio(`http://www.soundboardcity.com/sounds/fart-machine/fart${~~(r()*9)+1}.mp3`).play()

Mar 25 2017 1:00 AM UTC

}// 127/140

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Guys I'm very mature

u/donbright

Me too. We are all very grown up and serious here on Dwitter. Your insightful analysis of methane emissions will prove a great contribution to climate science.
u/joeytwiddle

Well this made me laugh :)

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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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alech

remix of d/2266 by u/alech

function u(t) {

c.width=1920;a=c.getContext('2d');a.font="1200px V";a.fillStyle=R(0,0,255*Math.abs(S(.1*t)));a.fillText('๛',300+200*S(5*T(t)),900)

Mar 22 2017 9:39 PM UTC

}// 130/140

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alech

function u(t) {

c.width=1920;
  for(i=0;i<64;i++){
  x.fillStyle = R(0,t*i%4*64,255*Math.abs(S(t)));
  x.fillRect(30+i*30+S(t)*50,500+(i%16)*20*S(t),20,20)}

Mar 22 2017 4:43 PM UTC

}// 140/140

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Jenky

function u(t) {

c.onmousemove=e=>m=[e.x*3.4,e.y*3.4];x.drawImage(c,C(t)*.2-2,S(t)*.2-2,1924,1084);x.fillStyle=`hsl(${t*600},99%,50%)`;x.fillRect(...m,8,8);

Mar 22 2017 11:37 AM UTC

}// 139/140

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Move the mouse around over the canvas for rainbows~

u/donbright

finally looked at this one in Chrome... breahtaking
u/donbright

breath even

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scottglz

remix of d/2194 by u/scottglz

function u(t) {

c.width=76;for(X=71;X--;)for(Y=40;Y--;x.fillRect(X,Y+S(X/9+7*t)+2,1,1))x.fillStyle=X<24&Y<20?Y%2|X-Y&3|!Y|!X?'#447':f:Y/3&1?f='#ddd':'#b23'

Mar 21 2017 8:19 PM UTC

}// 139/140

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u/sfz

awesome!
u/joeytwiddle

#flag

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pangolin

function u(t) {

if(t-~~t<.5){new Audio("data:audio/wav;base64,UklGRsYAAABXQVZFZm10IBAAAAABAAEAQB8AAIA+AAACABAAZGF0YaIZAAA"+Array(90).join("DWEET")).play();}

Mar 21 2017 3:46 PM UTC

}// 140/140

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Show more comments…
u/Myst

Play freebird
u/pangolin

I've been trying to get something that would play different notes, but I can't get it small enough. The next step would clearly be freebird.
u/recursive

There's a separate audio synthesis api that might work. It's kind of wordy though
u/mxfh

;new Audio("data:audio/wav;base64,UklGRsYAAABXQVZFZm10IBAAAAABAAEAQB8AAIA+AAACABAAZGF0YaIZAAA"+c.toDataURL("image/bmp").substr(22,4000)).play()
u/mxfh

have no idea how to tweak the wav header to align samples with imagedata and where the bmp header ends, but just past this to the end of any dweet
u/pangolin

There isn't much that changes in the header info: http://soundfile.sapp.org/doc/WaveFormat/
u/mxfh

ok here's your header tweak tool: http://codepen.io/mxfh/pen/mWLMrJ
u/joeytwiddle

#audio

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z3vin

function u(t) {

c.width=1920;r=(n)=>Math.random()*n;w=c.width;h=c.height;for(i=0;i<2999;i++)x.fillRect(r(w),r(h),w,1);x.fillRect(w/4,h/3+r(33),199,299)

Mar 21 2017 3:54 AM UTC

}// 135/140

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u/donbright

this looks amazing on my phone... because it was a lot slower than on my pc
u/z3vin

@donbright thanks man I'll have to try slowing it down to check it out.
u/joeytwiddle

pushing the envelope to ludicr͞óus s͡p̵ee͏d

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jick

function u(t) {

for(i=0;i<2e3;i++) { x.fillStyle=R(0,C(t*i)*255,0); x.fillRect(i,1070,10,4); }
x.drawImage(c,0,-5,1920,1080)

Mar 21 2017 3:07 AM UTC

}// 109/140

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u/donbright

interesting technique
u/Xen

your turn ;-) remix: #2920, i hope you like!
u/Xen

your turn ;-) remix: #2920, i hope you like!

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mxfh

remix of d/2230 by u/mxfh

function u(t) {

i=t*60
x.setTransform(64,r=i>15,b=i>7,64,w=900,h=519)
x.rotate(i*.7854)
x.fillStyle=`#${b?r?w:"FFF":h}`
x.fillRect(-3+r,0,b?r?4:6:w,w)

Mar 20 2017 9:51 AM UTC

}// 134/140

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golfpunk brexit edition

u/iverjo

#flag

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