Dwitter - javascript demos in 140 characters

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: #Food

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Xen

remix of d/21702 by u/schabanackk

function u(t) {

with(x)for(c.width=1e3,i=44;i--||stroke();)arc(499,270,260,q=i*t/7|0,q-t*9)

Feb 18 2021 9:09 PM UTC

}// 75/140

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quick play

u/Xen

just found z=219+(t%1.5) with(x)for(c.width=1e3,i=44;i--||stroke();)arc(499,270,260,q=i*z/7|0,q-z*9)

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Pascal

remix of d/21645 by u/Pascal

function u(t) {

c.width|=0,w=960
for(i=700;i--;x.fillRect(w+w*X/Z,w-Y/Z*w,s=(8/Z)**5,s))
X=3*C(U=i+t)+C(V=t+i/(1+t/w*.7)),Y=S(i)+C(V)*T(V)-2,Z=S(U)-5

Feb 13 2021 4:57 PM UTC

}// 133/140

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become donut

u/erin

become donut reject society
u/joeytwiddle

don't live your life in sphere, become #donut

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schabanackk

function u(t) {

with(x)for(fillRect(0,0,c.width=1e3,2e3),strokeStyle="turquoise",i=137;i--||stroke();)arc(499,270,570,q=Math.ceil(i*t/3)-1,q+t%(t*2))

Feb 18 2021 11:30 AM UTC

}// 134/140

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tunnel

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rodrigo.siqueira

remix of d/21670 by u/rodrigo.siqueira

function u(t) {

for(i=3e3;i--;x.fillStyle=`hsl(${99*t+i/99},99%,${30+S(i+t)*99}%,35%)`)x.fillRect(145*(t+5*C(i/2)*C(K=i/4+t)),90*(5*C(i+t)*T(K)*C(K)+6),2,2)

Feb 15 2021 5:17 PM UTC

}// 140/140

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Soft colors overlap

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Odog8

remix of d/21661 by u/Odog8

function u(t) {

t?x.fillRect(y%16+1,~~(y/16)+1,1,'ﰀꯀúʰΠ,฀೬㠀ೋೋ㌀ᄛᕛᕛ啬䑬㠀ʰຠꯀϪﰀ?'.charCodeAt(y/8).toString(4).split``.reverse()[y++%8]/3):(c.width=40,y=0)

Feb 15 2021 12:33 AM UTC

}// 140/140

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Boo Ghost! 4 colors!

u/tomxor

#pixelart #sprite
u/rodrigo.siqueira

~~(y/16)+1 can be changed to y/16 with almost no difference
u/Xen

slight golf t?x.fillRect(y%16,y/16,1,'ﰀꯀúʰΠ,฀೬㠀ೋೋ㌀ᄛᕛᕛ啬䑬㠀ʰຠꯀϪﰀ?'.charCodeAt(y/8).toString(4).split.reverse()[y++%8]/3):y=c.width=28

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Xen

remix of d/14761 by u/KilledByAPixel

function u(t) {

with(x)for(fillRect(0,0,c.width=1e3,2e3),strokeStyle="Red",i=199;i--||stroke();)arc(499,270,200,q=i^t,q+t%(t*7))

Feb 15 2021 6:25 PM UTC

}// 112/140

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quick test

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ciaccodavide

remix of d/21689 by u/ciaccodavide

function u(t) {

for(c.width|=i=0;i<1920;i++)x.fillRect(i,S(t/999*i+i/2)*540+492,9,96),x.fillStyle=R(66+i%196,66+(t*i)%196,66+(t*99)%196)

Feb 16 2021 6:21 PM UTC

}// 120/140

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Odog8

function u(t) {

t?0:c.width=40
y=frame
x.fillRect(y%16+1,~~(y/16)+1,1,'êᠵ珔ᇠ팈龏㯡ꅰ骃ᛈȷ赇缴䱬꽌࠘駂蝫ᛢࡒ'.charCodeAt(y/10).toString(3).split``.reverse()[y%10]/2)

Feb 12 2021 7:19 PM UTC

}// 137/140

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Mario! Took forever to golf

u/Odog8

#pixelart #mario
u/Odog8

If you change some of the parameters, you could set it to 4 colors, but i didnt need to lol
u/rodrigo.siqueira

You can save 2 characters if you remove 2 first lines of code and start with: t?x.fillRect(y++%16..... and end with: .../2):(y=0,c.width=40)
u/Odog8

oh sick, i didnt think of that! thanks man

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katkip

remix of d/21662 by u/Pascal

function u(t) {

c.style.filter=`invert(`
for(c.width|=0,i=244;i--;x.fill(x.arc((X=i%18)*120,(i-X)*7.5+60,z=80+S(t+i*19+t)*50,3.9+z/7,7+z/7)))x.beginPath()

Feb 13 2021 11:12 AM UTC

}// 138/140

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d/21666

u/joeytwiddle

I see scurrying insects

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ciaccodavide

function u(t) {

for(c.width|=i=0;i<1920;i++)x.fillRect(i,S(t/999*i+i/2)*1080,9,99)

Feb 16 2021 6:12 PM UTC

}// 66/140

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intertwining