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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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BirdsTweetCodersDweet

remix of d/6339 by u/BirdsTweetCodersDweet

function u(t) {

with(x){c.width^=0;v=(X,Y,R)=>[20*C(X+t)*R+960,20*S(Y+t)*R+540]
for(i=0;i<200;i++)lineTo(...v(5*i,5*i,S(t)*i*i/290));stroke()
}

Jan 22 2018 4:32 PM UTC

}// 127/140

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Hi-res :D

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Knifa

function u(t) {

for(i=0;i<64;i++)for(j=0;j<64;j++){q=i-32;r=j-16
x.fillStyle=R(S(t*q*r/99)*255,T(t*q*r/200)*255,C(t*q*r/50)*99)
x.fillRect(i*32,j*32,32,32)}

Jan 22 2018 4:30 PM UTC

}// 140/140

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BirdsTweetCodersDweet

remix of d/3187 by u/alien

function u(t) {

with(x){c.width=500;v=(X,Y,R)=>[20*C(X+t)*R+250,20*S(Y+t)*R+150]
for(i=0;i<200;i++)lineTo(...v((t/5)*i,(t/5)*i,S(t)*i*i/290));stroke()
}

Jan 22 2018 4:29 PM UTC

}// 136/140

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BirdsTweetCodersDweet

remix of d/3187 by u/alien

function u(t) {

with(x){c.width=500;v=(X,Y,R)=>[20*C(X+t)*R+250,20*S(Y+t)*R+150]
for(i=0;i<200;i++)lineTo(...v(5*i,5*i,S(t)*i*i/290));stroke()
}

Jan 22 2018 4:27 PM UTC

}// 128/140

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Sine always makes things better :)

u/BirdsTweetCodersDweet

d/6342 for hi-res

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Yogeshp3

remix of d/6244 by u/RUNIE

function u(t) {

c.width|=v=32
for(l=0;l<572;l++)d=l%v*v,x.fillStyle=`hsl(${t*150-d},99%,65%)`,x.fillRect(960+S(r=(1/C(t-d/5))+l/v*.35)*d,540+C(r)*d,v,24)

Jan 22 2018 4:19 PM UTC

}// 137/140

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washing machine swirel

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Knifa

function u(t) {

c.width=2e3
d=parseInt(Date.now()/1e3)
h=R(d/2.16e5%24*10,d/3600%60*4,d%60*4)
x.font='1.5e3% sans-serif'
x.fillStyle=h
x.fillText(d,334,650)

Jan 22 2018 4:11 PM UTC

}// 140/140

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Xen

remix of d/6334 by u/BackendForth

function u(t) {

c.width|=w=33
v=(i,j)=>x.lineTo((i+j)*w,w*j+S((i*i*j*j)**.4+t*9-i+j)*w)
for(i=w*w;i--;x.fill(v(a,j-1)))x.beginPath(),v(a=i%w,j=i/w),v(a-1,j)

Jan 22 2018 4:11 PM UTC

}// 140/140

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try angles.

u/sigveseb

sweet
u/donbright

kewl

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Xen

remix of d/6330 by u/FrenchToast

function u(t) {

for(c.width|=i=59,x.globalCompositeOperation='xor'
;i--;x.fill())x.beginPath(),x.arc(960+S(_=t*i)*S(t*7)*i*2,540+C(_)*C(t*4)*i*2,i*6,0,7)

Jan 22 2018 3:55 PM UTC

}// 137/140

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trying for a liquid effect

u/veubeke

remixed https://www.dwitter.net/d/6356

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BackendForth

function u(t) {

w=50
c.width=1920
v=(i,j)=>x.lineTo((i+j)*w,w*j+S((i*i+j*j)**.5+t)*w)
for(i=w*w;i--;x.fill())x.beginPath(),v(a=i%w,j=i/w),v(a+1,j),v(a,j+1)

Jan 22 2018 3:30 PM UTC

}// 139/140

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Show more comments…
u/Xen

wow
u/aleamb

impressive!!
u/Qwitter

Nice (I detect an incoming wave of surface wave dweets )
u/Qwitter

Rough Seas: v=(i,j)=>x.lineTo((i+j)*w,w*j+C(2*j-3*t)*S(i+t)*w)
u/donbright

the triangles is just marvelous
u/zanella

My new favorite dweet.
u/tl-code

wow

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Xen

remix of d/6323 by u/yonatan

function u(t) {

for(a=99;--a;x.fill()){x.beginPath(x.fillStyle=R($=a*S(a+t*9),a-$,$+a))
for(i=3;i--;)x.lineTo(960+C(z=t+a+i)*a*9,540+S(z%(t*t))*a*7)}

Jan 22 2018 3:20 PM UTC

}// 133/140

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Shoutz 2 yonatan and Veubeke

u/sigveseb

cool style
u/Xen

thanks :)