Dweets awesomed by u/mildlybean

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: #Opposites

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katkip

function u(t) {

f=x=>S(x/9)
d=31
x.stroke();for(i=0,t*=99;i++<380;)x.fillRect(i*5,540+f(i)*99,4,4);x.lineTo((q=t+d)*5,540+f(q)*99,x.moveTo(t*5,540+f(t)*99))

Dec 15 2019 8:51 AM UTC

}// 140/140

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change f(x) and d (difference)

u/katkip

f=x=>S(x/9)+C(x/9);d=81 is nice
u/katkip

lol that is actually equivalent to f=x=>S(x/9)*2;d=81

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KilledByAPixel

remix of d/16826 by u/KilledByAPixel

function u(t) {

with(x)for(fillRect(0,0,2e3,2e3),q=i=300;i--;beginPath(fill(arc(960+700*S(t+i*2),540+400*C(t+i*3),i/6,0,7))))fillStyle=R(i,i?S(i)*128+128:0)

Dec 15 2019 8:20 AM UTC

}// 140/140

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Lissajous curve points

u/KilledByAPixel

#Lissajous

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nntb

remix of d/3276 by u/cantelope

function u(t) {

for(x.fillRect(0,0,i=(w=1e3)*2,i);--i;)x.clearRect(w+((i+S(i)*9/(Z=3+((i/60|0)*2+t*16)%65))%30-15)/Z*w,561+(3-S(i*4+t)*76/Z)/Z*w,s=w/Z/Z,s)

Dec 14 2019 11:41 PM UTC

}// 139/140

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just a little adjustment to make it seem more like the back seat of a car

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Odog8

function u(t) {

a=~~(t*60)*60;x.fillRect(a%1920,a%1080,60,60)

Dec 14 2019 9:27 PM UTC

}// 45/140

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#checkerboard

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mildlybean

function u(t) {

t?onclick=_=>c.width|=s=t:s=1;for(X=Y=i=Q=3;i--;Y+=C(t*R(9))*R(750/Q))R=r=>~~(S(r**i*s)*r),X+=S(t*R(9))*R(750/Q);x.fillRect(X+960,Y+540,9,9)

Dec 14 2019 6:35 PM UTC

}// 140/140

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The pattern changes every time you click! Try increasing Q for more intricate designs

u/katkip

some of them are really nice!
u/mildlybean

Oops, I just realized u/Blacklink already did this d/16770

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katkip

function u(t) {

for(i=-55;i++<53;)for(j=39;j--;)x.fillStyle=R(i<0?255+i*2:0,i<0?155+i*8:0,i<0?0:S(i*i+j/2+t*i/12)*i*5,.2),x.fillRect(j*50,i*10+540,50,50)

Dec 11 2019 9:24 PM UTC

}// 137/140

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ｓｕｎｗｅｎｔｄｏｗｎ#landscape #waves

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Xen

remix of d/16794 by u/rodrigo.siqueira

function u(t) {

for(c.width|=w=950,i=7e3;i--;x.lineTo(w+w*X/(Z=S(U*t/i+t*3)-C(t)-7),w*Y/Z))X=9*C(U=i/3)+C(V=1e9/U)*S(t/5)*9,Y=7*S(U*U)*C(V-t)-4
x.stroke()

Dec 5 2019 6:21 PM UTC

}// 138/140

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Neuro-Logikal (keep staring)

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katkip

function u(t) {

x.fillRect(0,0,2e3,2e3);for(j=2;j--;)for(i=1080;i--;)x.clearRect(960+S(t+i/99+j*4)*200,i,i%50==0?-S(t+i/99+j*4)*200:9,9),x.globalAlpha=.1

Dec 4 2019 3:39 PM UTC

}// 137/140

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u/joeytwiddle

#organic

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rodrigo.siqueira

remix of d/13690 by u/rodrigo.siqueira

function u(t) {

for(c.width|=w=950,i=2e3;i--;)X=3*C(U=i/3)+C(V=1e6/U)*C(t),Y=(2+S(U*3+t))*S(U+t)-3,Z=S(U*2+t*9)-C(t*4)-6,x.lineTo(w+w*X/Z,w*Y/Z)
x.stroke()

Dec 4 2019 2:21 PM UTC

}// 139/140

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Dancing fiber ribbon

u/katkip

smooth
u/Xen

Very smooth

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lionleaf

remix of d/16787 by u/KilledByAPixel

function u(t) {

c.width|=i=0
x.font='21em monospace'
'Not yet'.split('').map(c=>x.fillText(c,9+(I=i%13)*145,420+S(I+t)*99+399*(i++/13|0)))

Dec 4 2019 1:14 AM UTC

}// 122/140

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u/testerrr

test

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