Dweets awesomed by u/3bl3gamer

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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maraoz

remix of d/357 by u/maraoz

function u(t) {

c.width=1920;m=t/10;s=Math.sqrt;function f(y){return S(y*m)};for(i=0;i<400;i++){x.fillRect(i*5,540*(1+f(i)),S(i/400+m)*100,S(i/400-m)*100)};

Jul 24 2016 4:42 AM UTC

}// 140/140

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u/BuRRak

s is not used

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maraoz

remix of d/356 by u/maraoz

function u(t) {

c.width=1920;function f(y){return Math.sqrt(y)/2*C(y*t)*S(y)*(S(C(t/2))+1)};for(i=0;i<400;i++){x.fillRect(i*5,540+f(i/30.8)*200,8,8)}

Jul 24 2016 4:22 AM UTC

}// 133/140

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If you'repatient you'll encounter some interesting patterns

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iverjo

function u(t) {

x.fillRect(i=0,87,W=c.width=310,3);x.font='49px A';for(a of'🚂🚃🚃🚃🚃🚃🚃')x.fillText(a,q=W-t%4*W+i++*46,90+S(q/15))

Jul 24 2016 2:14 AM UTC

}// 110/140

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It turns out that this looks different with the Windows 10 Anniversary update

u/iverjo

#train

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iverjo

function u(t) {

c.width=1920;x.font='500px A';x.textAlign='center';x.fillText(String.fromCharCode(55357,56906-[0,2,1,2][0|t*1.2%4]),960,650)

Jul 23 2016 4:17 PM UTC

}// 124/140

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u/sigveseb

lol
u/iverjo

#monkey

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PhiLho

function u(t) {

c.width=W=400;D=16;H=D/2-1;
for(h=W;h-=D;)for(v=W;v-=D;){s=H*C(t*h/30);n=H*S(t*v/30);x.moveTo(h+s,v+n);x.lineTo(h-s,v-n);x.stroke()}

Jul 22 2016 2:24 PM UTC

}// 132/140

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u/iverjo

This runs at 2-3 FPS in Firefox on my laptop because of the missing x.beginPath(). Here's a version that runs at a much higher framerate: c.width=W=400;for(h=W;h-=16;)for(v=W;v-=16;){s=7*C(t*h/200);n=7*S(t*v/200);x.beginPath();x.moveTo(h+s,v+n);x.lineTo(h-s,v-n);x.stroke()}
u/PhiLho

Good to know, thanks.

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iverjo

function u(t) {

c.width=960;for(i=20;i--;)for(j=12;j--;)x.beginPath(),x.arc(50*i-9*S(A=4*t+i*C(t/8)*.6+j*S(t/8)*.4),50*j+9*C(A),19+C(A)/.4,0,7),x.fill()

Jul 22 2016 1:34 PM UTC

}// 136/140

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Inspired by http://dweet.dwitter.net/id/322?autoplay=1

u/iverjo

#dots

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New_Core

function u(t) {

g=150;w=c.width=1920;x.font=g+"px s";x.fillText("NEW CORE",g,g);for(i=g;i--;)d=S(t+i*0.01)*g,x.drawImage(c,d,i,g*9,1,w+t%35*-g,500+i,w,1);

Jul 22 2016 11:35 AM UTC

}// 138/140

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u/sigveseb

Very cool technique!
u/iverjo

Agreed
u/13thptr

#text

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mmerchante

function u(t) {

W=A=B=c.width=3e2;x.fillRect(0,0,B,B);while(--W){A=B*A>>8;k=A%4;x.fillStyle=R(0,B/k);x.fillText(String.fromCharCode(t+B*W),W,(A+t*B/k)%B);}

Jul 22 2016 3:26 AM UTC

}// 139/140

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u/iverjo

#matrix

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sigveseb

function u(t) {

c.width=512;x.beginPath();x.translate(256,128);(a=b=>{b&&a(b-1);x.rotate(1+S(t/99));x.lineTo(C(t+b/90)*b/8+b/4,9+S(t)*99)})(512);x.stroke();

Jul 21 2016 10:40 PM UTC

}// 140/140

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u/iverjo

Cool! If you had to give this a name, what would it be?
u/sigveseb

Dweety McDweetface
u/iverjo

lol
u/iverjo

Swirly McSwirlface

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sigveseb

function u(t) {

(F=Z=>{for(x.fillStyle=R(W=1/Z*4e3,W/2,W/4),i=Z*Z*2;n=i%Z,m=i/Z|0,i--;n%2^m%2&&x.fillRect((n-t%2-1)*W,(S(t)+m-1)*W,W,W));Z&&F(Z-6)})(36)

Jul 21 2016 8:08 PM UTC

}// 136/140

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u/iverjo

Nice remake of https://youtu.be/sQNcIKAIBF0?t=4m6s :D
u/iverjo

1/Z*4e3 can be replaced with 4e3/Z
u/sigveseb

Right you are! I thought I had already done that :3
u/Ameo

Holy s*** that's absolutly amazing.
u/sebbert

TiTAAAAAN

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