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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robotman_

function u(t) {

c.width=1920
k=8/3.14
for(i=0;i<16;i++)x.fillStyle=`hsl(${i*360/16},99%,50%`,
x.fillRect(960+S(t-i/k)*400,540+C(t-i/k)*400,60-i*3,60-i*3)

Feb 26 2019 5:14 PM UTC

}// 137/140

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My first attempt

u/Qwitter

pretty
u/Xen

Welcome to the dwitter family!

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nini1294

function u(t) {

c.width^=0
x.lineWidth=8
x.translate(960,540)
for(i=1;i<=5;i++){
x.beginPath()
x.arc(0,0,100*((1+S(t))*i),0,2*Math.PI)
x.stroke()
}

Mar 1 2019 8:43 AM UTC

}// 131/140

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rodrigo.siqueira

remix of d/12491 by u/rodrigo.siqueira

function u(t) {

t||(a=b=0)
for(i=7e3;i--;)x.fillStyle=`hsl(9,45%,${S(t*4)*50}%,25%)`,x.fillRect(
960+b*C(a),540+b*S(a/1e4),1,1),a+=3*C(2*a+b)+.2,b+=.0006

Feb 27 2019 2:31 PM UTC

}// 137/140

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Spirograph

u/rnbw

.0006 can be replaced by 6e-4 (it's a measly 1 byte saved, but i guess the end goal is doing a lot with a little)

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Gabe

remix of d/12541 by u/geb

function u(t) {

for(c.width|=i=99;i--;x.rect(~r,~r,2*r,2*r))r=(i-1*t%8)*24,r*=r>1,x.setTransform(~30,~0,~80,1,9,70),x.rotate(t-r/666);x.fill('evenodd')

Feb 27 2019 1:40 PM UTC

}// 135/140

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u/metamero

nice, Gabe! i'm glad you're using the remix feature and making experiments, modding other dweets and referencing then at the same time. on dwitter soon we learn more then we thought we could. keep coding, you're welcome!

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missfabulous

function u(t) {

c.width=1920
x.translate(960,540)
for(i=0;i<50;i++){
x.rotate(S(t)/16)
x.fillRect(0,0,9,500-i*10)
x.fillRect(0,-500,9,500-i*10)
x.fill()}

Feb 28 2019 12:46 AM UTC

}// 137/140

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21medals

remix of d/10512 by u/f8f82804

function u(t) {

for(c.width|=j=20;j--;)for(i=17;i--;x.lineTo(960+a*S(p)/.7,540+(i&4?a:-a)))a=960*j/20/(3+C(p=T(t+j/9)/9+1.57*(i-(i>>2))))
x.stroke()

Feb 24 2019 9:59 PM UTC

}// 132/140

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u/f8f82804

some similar dweets: d/10900, d/10905, d/10907

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QuantumObserver

function u(t) {

for(c.width|=0,i=120,x.lineWidth=i%4;i--;)
x.rect(0,0,i*5*c.width*t,i/2*C(c.height)*t);
x.stroke();

Feb 28 2019 9:26 PM UTC

}// 99/140

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geb

remix of d/12550 by u/robbyg

function u(t) {

s=250
c.width|=0
for(h=9;h--;)for(v=9;v--;){
x.beginPath()
for(i=9;i--;)x.lineTo(s*h+s*C(z=t+4.186*i),s*v+s*S(z/2))
x.stroke()
x.fill()
}

Feb 27 2019 5:52 PM UTC

}// 137/140

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Xen

function u(t) {

for(c.width|=x.lineWidth=i=9;i--;)for(j=50;j--;x.strokeStyle=`hsl(${j*t} 90%50%`)x.strokeRect(400+i*99+S(t)*300+S(j*t)*9,400+C(j*t)*9,j,200)

Feb 27 2019 2:53 PM UTC

}// 140/140

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#default #trip

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katkip

remix of d/12510 by u/katkip

function u(t) {

c.width*=1;x.lineWidth=4;for(j=79;j--;)for(i=5;i--;)x.lineTo(960+C(i*1.57+j/(20+C(t+j/29)*5)+t)*200,900+S(i*1.57+j/99+t)*60-j*9);x.stroke();

Feb 24 2019 12:30 PM UTC

}// 140/140

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Twist