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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andrea270872

function u(t) {

a=t%1*2e3
b=(20*~~t)%1e3
x.fillStyle=R(C(a)*S(b)*80+80,160,0)
x.fillRect(a,b,35,20)

Oct 20 2020 2:49 PM UTC

}// 83/140

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just testing some ideas on the theme "what can I do without loops?"

u/solendil

#noloop

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danny@hille.dk

function u(t) {

for(m=Math,c.width=X=99;X--;)for(Y=66;Y--;)a=m.atan2(X-50,Y-30),x.fillStyle=R(X,S((a+S(m.hypot(X-50,Y-30)/-13+t))*5)*99),x.fillRect(X,Y,1,1)

Oct 20 2020 11:36 PM UTC

}// 140/140

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wonky spiral

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dethe

function u(t) {

c.width=1920 // clear the canvas
p=Math.PI
h=(n,f)=>n+f(i*p/180)*n/2+f(t+i)*n/3
for(i=0;i<360;i++)
x.fillRect(h(960,S,C),h(540,C,S),25,25)

Oct 20 2020 5:06 AM UTC

}// 138/140

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First dweet in ages, but I like it

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ciaccodavide

function u(t) {

j=100
while(j-->0){k=100
while(k-->0){x.fillStyle=R((1-j)*S(t)+k*C(t+3),k*S(t),j*C(t)+k*S(t))
x.fillRect(j*19.2,k*10.8,19.2,10.8)}}

Oct 20 2020 10:23 PM UTC

}// 131/140

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From Dusk Till Down

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Xen

remix of d/16490 by u/Xen

function u(t) {

for(i=2e3;i--;x.fillRect(i,0,1,9))x.fillStyle=`hsl(${i+S(i+t*t)*199},69%,50%)`;x.drawImage(c,0,9)

Oct 20 2020 9:07 PM UTC

}// 97/140

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test

u/danny@hille.dk

Nice

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ciaccodavide

remix of d/20336 by u/ciaccodavide

function u(t) {

இ=10
F=ஔ=>(ஔ%(1+S(t))*10<2)
for(அ=1080/இ;அ--;)
for(ஆ=1920/இ;ஆ--;)
x.fillStyle=F(t*10+ஆ+S(அ+t*100))?"#ed9":"#369",x.fillRect(ஆ*இ,அ*இ,இ,இ)

Oct 21 2020 10:22 AM UTC

}// 136/140

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S̮̣̥ ̡̦̺̯̜͍̠ͧͧ̿̐ͣ̽ͦͅT͔̺͍͙́ͅͅ ̥̙̮̲͎́̋̔́̍̎̔̕A̡͑ ͚͇͙͚̜ͪ̿̎T͆ͬ̎͋͏̹ ̶̻̜̟̣̉̾͌ͣ̊̅̍Ḯ̢͍̲̪̳̟̔̅ ͎̂C̘̳̟̰̞

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ciaccodavide

function u(t) {

d=10
F=n=>(n%d<2)
for(k=1080/d;k--;){
for(j=1920/d;j--;){
x.fillStyle=F(t*d+j+S(k+t*100))?"#ed9":"#369",x.fillRect(j*d,k*d,d,d)}}

Oct 21 2020 10:07 AM UTC

}// 129/140

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Twirly Spaghetti

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New_Core

remix of d/20293 by u/jellyedwards

function u(t) {

with(x)for(c.width|=i=150;i--;fill(lineTo(X,Y)))beginPath(fillStyle=R(a=99+i*6,a/5,b=i%2*8)),ellipse(X=960,Y=150+i+b*t,499,99,0,15+b*10,7+b)

Oct 19 2020 5:32 PM UTC

}// 140/140

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I wanted to slice the cake too but I cant say it got any better...

u/smtsjhr

some do prefer a slightly burnt crust

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ciaccodavide

remix of d/20319 by u/ciaccodavide

function u(t) {

c.width=w=1920
y=360
g=50
n=t%4
n=n>2?4-n:n
n*=y
x.fillRect(0,n,w,y)
x.fillRect(g,0,1820,2e3)
x.fillStyle='#afa'
x.fillRect(n*2.6,160+n,g,g)

Oct 21 2020 6:28 AM UTC

}// 140/140

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Linear Door Pong

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solendil

function u(t) {

x.beginPath()
x.fillStyle=`hsla(${t*50},99%,50%,0.1)`
x.ellipse(S(t+S(5**.5*t))*900+950,C(t+S(t)*C(3.14*t))*500+550,99,99,0,0,10)
x.fill()

Oct 20 2020 3:37 PM UTC

}// 138/140

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Candy worms #noloop