Random dweets | Dwitter

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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abnry

function u(t) {

c.width=4e2
a=x.createImageData(4e2,2e2)
b=a.data
n=150
for(i=0;i<b.length;i+=4){
b[i]=i/4%4e2*t*2*i/8e2%n
b[i+3]=n}x.putImageData(a,0,0)

Dec 26 2017 9:38 PM UTC

}// 137/140

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xxoo00

function u(t) {

c.width=1920;for(i=0;i<9;i++){x.fillRect(400+i*100+S(t)*300,400,50,200)}

Feb 21 2017 1:18 AM UTC

}// 72/140

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joeytwiddle

remix of d/11737 by u/katkip

function u(t) {

c.style.marginLeft=100*C(t)+'px';t||(X=Y=0);while(t++<400)NY=X/5,X=(Math.random()*9|0)*100+50*Y/200,Y=NY,x.fillRect(100+2*X,200+4*Y,1,1)

Jan 12 2019 5:31 PM UTC

}// 136/140

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Defaultception IFS. We heard you like the #default so...

u/joeytwiddle

...we put some defaults in your default
u/metamero

Awesomeness++ for this great use of marginLeft

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magna

function u(t) {

c.width=w=3;t?x.putImageData(new ImageData(new Uint8ClampedArray(a),w,1),0,0):a=c.toDataURL().split('').map(k=>k.charCodeAt(0)).slice(0,w*4)

Mar 1 2017 3:35 AM UTC

}// 140/140

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Gradient from nothing

u/sigveseb

Can't explain that!
u/magna

PNG header FTW
u/iverjo

Wait what? This needs an explanation :D
u/magna

@iverjo I export the empty canvas as a PNG image. The PNG file has non-zero bytes (because it needs to have a header and a bare minimum content to encode the empty content) that I directly use as RGBA values for the canvas image data (the pixel array).
u/magna

#glitch

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MrAnderson

function u(t) {

c.width|=1;for(i=1;i<150;i++){b=1.4*t+i;o=200-(S(b+23)*10)%26;x.fillStyle=R(0,o,0,1);x.fillRect(940+((i/66)%1)*S(b)*227,40+i*6%399,25,10);}

Dec 27 2017 7:45 PM UTC

}// 139/140

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Tree variation 1

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joeytwiddle

remix of d/554 by u/iverjo

function u(t) {

b=33;for(i=0;i++<1e3;)s=45/(9-(t+i/99)%9),x.fillStyle=R((d=i*119)%256,d/1.4%256,d/7%256),x.fillRect(960+5*s*C(h=i*t/b+t),540+5*s*S(h),s,s)

Dec 4 2017 4:51 PM UTC

}// 138/140

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Just a minor remix. Play with the b variable ;-)

u/Xen

:-D
u/Xen

i had a play #3604
u/joeytwiddle

b=14 is my favourite KALIVERSCOPE
u/joeytwiddle

#kaleidoscope

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sawaxon

remix of d/1671 by u/sawaxon

function u(t) {

c.width|=0;for(j=1;j<40;j++)for(i=1;i<40;i++)x.fillRect(900+S(10+(C(t*j)*50)/2000)*j*40,500+C(i/((t+142)/10))*j*20,S(j*i)*j/3, S(j*i)*j/3)

Mar 1 2017 10:35 AM UTC

}// 138/140

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antonio

function u(t) {

for(i=0;i<400;i++){e=this;X=e.X||0;Y=e.Y||0;s=Math.floor((Math.random()*3)+1);A=(X+s%2)/2;B=(Y+s)/2;x.fillRect(A*900,B*500-500,1,1);X=A;Y=B}

Feb 22 2017 12:08 PM UTC

}// 140/140

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u/iverjo

#sierpinski

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vinca

remix of d/13621 by u/vinca

function u(t) {

eval(unescape(escape`睩瑨⡸⥻景爨挮睩摴桼㵩㴷ⱦ楬汓瑹汥㵒⠹㤪匨琩⤻椾〻汩湥呯⠱攳⬵〰⩃⡩⭓⡴⭓⡴⭩⤩⤬㔴〫㔰〪匨椭㴮〱⤩⤻景爨捬楰⠩Ⱪ㴲〰㭩ⴭ㭣汯獥偡瑨⡡牣⠹㤪⡩⼹簰⤬椥㤪ㄲ〬㈵⬲㔪匨椫琩ⰰⰷ⤩⤻晩汬⠩紻`.replace(/u(..)/g,"$1%")))

May 5 2019 3:59 AM UTC

}// 140/140

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u/13thptr

Nice and original :)

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Xen

remix of d/18032 by u/jamespwilliams

function u(t) {

Y=91*S(u=(t%18)>9?9-t%9:t%9)*C(t*S(t)/9)
x.drawImage(c,x.globalAlpha=.7,49)
x.fillText("🔥🌊🌪️⛳",231*u,99+Y)

Mar 20 2020 8:22 PM UTC

}// 106/140

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lil remix