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/13287 by u/robotman_

function u(t) {

x.fillStyle=R(S(t*.9)*200,C(t/.9)*200,99,.04)
for(i=1e3;i--;)x.fillRect(960+S(t)*i+C(a=3.7*t+i)*i,560+C(t)*i+S(a)*i,9,9)

Apr 18 2019 1:19 AM UTC

}// 120/140

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jeff

function u(t) {

for(i=6;i++<199;){x.beginPath();k=i/2
x.fillStyle=R(k*(t%7),k*(t%5),k*(t%3.5))
x.arc(960+S(t*i/4)*6*i,540+C(t*i/4)*6*i,40,0,.1,1)
x.fill()}

Apr 16 2019 12:57 AM UTC

}// 139/140

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Submission #2

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LimeLaser

function u(t) {

x.globalAlpha=0.02
x.font="320pt courier"
r=50*S(t)
x.strokeText("DWITTER",50+r*C(t),600+r*S(t))

Apr 15 2019 5:52 AM UTC

}// 96/140

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X-Ray Courier Font

u/joeytwiddle

What's the prognosis, doc?
u/joeytwiddle

#text

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katkip

function u(t) {

c.width+=0;x.translate(960,540);for(r=4;r<1000;r+=5)x.strokeRect(-r/2,-390+r/2,10+r,r/4),x.rotate(C(t*4+r/199)/199);

Apr 15 2019 11:52 AM UTC

}// 116/140

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#jelly pyramid #d3

u/katkip

not golfed

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KilledByAPixel

remix of d/13274 by u/KilledByAPixel

function u(t) {

for(i=0;i<(F=2e3);)x.fillStyle=R(i,i,i),x.fillRect((S(i)*1e9-t*i/9)%F,i*9%F,j=i++?i%7:F,j)
x.font="230px'"
x.fillText("DWEETWARS",240,630);

Apr 17 2019 7:29 PM UTC

}// 139/140

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#dweetwars

u/Xen

nice! i know what i need to do now but dont know if its possible lol
u/KilledByAPixel

The dark side clouds everything. Impossible to see the future is.

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Xen

function u(t) {

t?x.fillText(1,2,3):c.width=45,x.drawImage(c,6+t^7,8-t^9)
////10

Apr 17 2019 5:54 PM UTC

}// 64/140

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just playing about.

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SuperMayo

function u(t) {

t?0:nx=ny=3,a=2,b=3,c=d=1.3,x.globalAlpha=0.1;for(i=1e4;i--;)nx=S(ny*b)+c*S(nx*b),ny=S(nx*a)+d*S(ny*a),x.fillRect(999+nx*400,540+ny*230,1,1)

Apr 17 2019 3:06 PM UTC

}// 140/140

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u/Xen

little golf and tweak

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username

remix of d/13266 by u/username

function u(t) {

for(i=c.width|=h=7e4/4e4;q=--i%3-1,a=q?i:i*h+h/2;x.fillRect(960+S(a+t)*800/r/z,540+(q||T(i))*800/z,s=70/z/z,s))r=S(a%h),z=4+C(a+t)/r,z*=z>1

Apr 16 2019 11:00 PM UTC

}// 139/140

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spirals

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username

remix of d/13259 by u/username

function u(t) {

for(i=c.width|=h=124/226;q=--i%3-1,a=q?i:i*h+h/2;x.fillRect(960+S(a+t)*800/r/z,540+(q||T(i))*800/z,s=70/z/z,s))r=S(a%h),z=4+C(a+t)/r,z*=z>1

Apr 16 2019 10:58 PM UTC

}// 139/140

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room

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KilledByAPixel

function u(t) {

f=(s,w)=>(m=(S(i*s/1e3)*199+99)*t%w,m>w/2?w-m:m)
for(i=1e3;--i;)x.fillStyle=`hsla(${i},99%,${f(4,99)}%)`,x.fillRect(f(2,3831),f(5,2151),9,9)

Apr 15 2019 4:24 AM UTC

}// 140/140

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1000 squares #bounce for you.

u/Xen

it gets better the longer you leave it ;)
u/KilledByAPixel

It does descend into chaos eventually but it takes a while.