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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: #Food

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f8f82804

function u(t) {

c.width^=r=a=>x.rotate(a);x[l='translate'](960,a=99);f=d=>d--&&x.fillRect(0,t%1*a,9,9)&x[l](0,a)&r(4)&f(d)&r(4)&f(d)&r(-8)&x[l](0,-a);f(t&7)

Sep 8 2018 5:59 AM UTC

}// 140/140

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Inspired by d/9635, but with a very different approach: no looping or explicit state #functional #golf

u/donbright

how???????
u/f8f82804

Looping is done by recursion and state is managed with the context's transform stack
u/Toby

Hi, could you explain what x[l='translate'] is accessing, please?

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f8f82804

remix of d/5600 by u/p01

function u(t) {

for(i=c.width^=0;i--;x.beginPath(x.fill()))C(t-i)>0&&x.arc(960+(i*960-i*i)**.5*S(t-i),48+i,9-(b=S(t-i-1)*C(Math.acos(i/540-1)+1))**4*9,0,7)

Sep 5 2018 6:50 PM UTC

}// 139/140

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#specular #halftone #sphere

u/f8f82804

#d3

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donbright

remix of d/9639 by u/joeytwiddle

function u(t) {

x.fillRect(0,0,W=c.width=399,W);for(j=20;j--;x.shadowBlur=j)x.lineTo(S(t*j)*199,C(j*t)*199),x.strokeStyle=x.shadowColor=R(W,W,W),x.stroke();

Sep 5 2018 4:54 AM UTC

}// 140/140

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really simple based on Joey Twiddle's work but i kind of like it.

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Agnes

remix of d/9650 by u/Agnes

function u(t) {

A=a=>Math.random()*a;for(P='M960 540',i=Q=255;i--;P+='l'+(20-A(40))+' '+(20-A(40)));x.strokeStyle=R(A(Q),A(Q),A(Q)),x.stroke(new Path2D(P))

Sep 3 2018 9:29 PM UTC

}// 139/140

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Yarn planet (variant of previous dweet with strokes instead of fills)

u/f8f82804

#path2d
u/donbright

creative

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f8f82804

remix of d/9542 by u/f8f82804

function u(t) {

for(U=V=0,z=i=64;i--;)for(j=z;j--;x.fillRect(16*i+448,16*j,16,16))U+=i+S(t),V+=j+C(t)/9,x.fillStyle=R(U>z?(U-=z,255):0,V>z?(V-=z,255):0,255)

Aug 31 2018 5:05 PM UTC

}// 140/140

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#outrun #palette #dithering #animated

u/f8f82804

the palette that's being rendered in 4 colors: for(z=i=64;i--;)for(j=z;j--;x.fillRect(16*i+448,16*j,16,16))x.fillStyle=R(i*4,j*4,255)

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yokljo

function u(t) {

c.width|=g=400
x.translate(g,g)
for(i=40;i--;)x[f="fillRect"](190,i*50+t*g%40,9,9)
for(;i++<g;x[f](30,0,7,350+(i%22)*2))x.rotate(i?1/63:t*2)

Aug 31 2018 1:32 PM UTC

}// 140/140

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I played Half Life 2 recently...

u/aleamb

lol! cool
u/joeytwiddle

#blood #saw #tribute

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Exca

function u(t) {

for(i=0;i<5184;i++){q=i%96,w=i/96|0
y=S(q*C(t)/5+w*S(t)/6)*t*9
o=S(q/7+w/4)*t*9
x.fillStyle=R(y^o,y|o,y+o+199)
x.fillRect(q*20,w*20,20,20)}

Aug 31 2018 12:12 PM UTC

}// 139/140

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Fixed previous one. Wait for a few seconds for effect to start.

u/magna

#waitforit

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atgz

remix of d/9444 by u/DataMeta

function u(t) {

v=Math.abs;for(c.width|=i=360;i--;)x.ellipse(960+C(t)*64,b=540,b*.618*v(C(t-i)),b*v(S(C(t)+i--)),-t+i,-t,7);x.stroke();

Aug 28 2018 3:02 PM UTC

}// 120/140

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prplz

remix of d/7238 by u/prplz

function u(t) {

let X,Y,A=S(t),B=C(t)
for(Y=q=32;Y--;)for(X=60;X--;x.fillRect(X*q,Y*q,q,q))x.fillStyle=X*B+Y*A&8^Y*B+X*A&8?'#000':'tan'

Aug 27 2018 8:37 AM UTC

}// 119/140

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DataMeta

remix of d/8605 by u/DataMeta

function u(t) {

v=Math.abs;for(c.width|=i=360;i--;)x.ellipse(960+C(t)*64,b=540,b*.618*v(C(t-i)),b*v(S(C(t)+i)),-t+i,-t,7);x.stroke();

Aug 26 2018 5:10 AM UTC

}// 118/140

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