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.

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ciaccodavide

function u(t) {

r=n=>~~(Math.random()*n)
R=r(i=10)
x.font="3em'"
x.fillText(r+'',0,60)
while(i--)V.push(0),x.fillRect(0,i*99+99,V[i],90)
V[R]++}{V=[]

Nov 20 2020 10:43 AM UTC

}// 133/140

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Random Number Generator Function Tester

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dnmc

function u(t) {

B=300
c.width=2e3
x.font=(C(S(t*6)))*99+"px serif"
for(i=20;i--;)
x.fillText("lugubrious".slice(0,t+1),B+B+B*S(t-i),B+B+B*C(t+i))

Nov 20 2020 6:19 AM UTC

}// 129/140

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ciaccodavide

remix of d/20648 by u/ciaccodavide

function u(t) {

c.width|=p=314
for(X=p+1;X--;)
r=p+C(X+t*10)*Math.max(0,.5-Math.abs(.5-(X+t*50)%p/p)-.4)*p,
x.lineTo(C(X/50)*r+960,S(X/50)*r+540)
x.fill()

Nov 16 2020 8:19 PM UTC

}// 138/140

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L O A D I N G filled

u/ciaccodavide

#loading
u/tomxor

Nice!

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ciaccodavide

remix of d/20673 by u/ciaccodavide

function u(t) {

c.width|=1
for(i=0;i<99;i++)
x.moveTo(960+C(t*i)*300,530+S(t*i)*300),
x.arc(960+C(t*i/100)*300,530+S(t*i/100)*300,.9*i,0,9)
x.stroke()

Nov 18 2020 9:38 AM UTC

}// 134/140

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Ouroboros Mess

u/Xen

nice!

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ciaccodavide

function u(t) {

P=(f,n,z)=>f(t*(100*t%500))*(100*t%500)+n
x.lineTo(P(C,960),P(S,540))
x.fillStyle=R(S(t)*1e3,C(t)*1e3,S(t*.8)*1e3,(1+C(t))/2)
x.fill()

Nov 18 2020 10:09 PM UTC

}// 134/140

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Bright Corrosion

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danny@hille.dk

remix of d/20689 by u/yonatan

function u(t) {

q=c.width=99;for(m=28;m--;x.fillStyle=R(q,q,m*9))for(n=i=q;i--;x.fillRect(i,a*(25-m),2,q))for(a=j=3;j--;a+=S((t/m*q+i)*S(m*k)*k/9)/k)k=4**j

Nov 18 2020 7:38 PM UTC

}// 140/140

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better?

u/danny@hille.dk

-2 bytes ->q=c.width=99;for(m=28;m--;x.fillStyle=R(q,q,m*9))for(i=q;i--;x.fillRect(i,a*(25-m),2,q))for(a=j=3;j--;a+=S((t/m*q+i)*S(m*k)*k/9)/k)k=4**j

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Xen

remix of d/20649 by u/pernicious

function u(t) {

for(i=1e3;i--;x.strokeStyle=`hsl(${t*i},99%,36%)`)x.strokeRect(910+i*C(t*i),500+i*S(t*i),99,99);x.drawImage(c,0,0,1920,1080,5,5,1910,1070)

Nov 17 2020 5:27 PM UTC

}// 138/140

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golf and play

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geb

remix of d/20620 by u/dnmc

function u(t) {

b=199
c.width=b*9
p=0|window.p
p=++p%b
for(q=0;q<b;q++)
for(w=0;w<b;w++)
if(q%p&w%p){
x.fillStyle=R((w+q),t,p)
x.fillRect(9*q,9*w,9,9)}

Nov 16 2020 9:16 AM UTC

}// 135/140

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#Sierpinski

u/Xen

nice
u/katkip

smooth

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taupelink

remix of d/20591 by u/taupelink

function u(t) {

r=Math.random;for(i=k=214;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*5)*9,h=k*S(C(C(S(p=Y*S(q=2-X/3)/2)))),x.fillStyle=R(h*p,h*q,2*h*C(p/q))

Nov 16 2020 1:49 AM UTC

}// 139/140

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d/20630

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Itoeh

function u(t) {

c.width=1920 
for(i=0;i<2e3;i++) {
  n=[0,2,2e3];x.fillStyle=`hsl(${i*2},90%,40%)`
  x.fillRect(i*8,...n)
  x.fillRect(i*4+S(t)*2,...n)
}

Nov 18 2020 1:13 AM UTC

}// 139/140

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#moire hello dweet

u/13thptr

welcome
u/Xen

welcome to the dwitter family