Dweets awesomed by u/akm

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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Current theme challenge: #Opposites

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Anthorouss

function u(t) {

c.width=1920
for(i=30,l=99;i--;w(-1),w(1),x.stroke())n=C(t-i*.4)*75,w=z=>x.fillRect(k=z*n+l,m=150*i/4,9,9,x.moveTo(n+l,m+5),x.lineTo(k,m+5))

Feb 2 2018 3:05 PM UTC

}// 140/140

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Mimified by u/akm

u/Jezza

Deoxyribonucleic Acid!

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zanella

remix of d/6642 by u/BirdsTweetCodersDweet

function u(t) {

with(x)font='1000px x',lineWidth=15,strokeStyle=`hsl(${t*90},99%,50%)`,setLineDash([2,1750]),lineDashOffset=t*100,strokeText('🚓',400,840);

Feb 2 2018 12:21 PM UTC

}// 138/140

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zeDesloges

function u(t) {

x.fillRect(0,0,2e3,2e3);
for(j=199;j--;)
x.clearRect(960+C(j)*250,490+S(j+t*1)*250,3,10)

Feb 2 2018 3:43 AM UTC

}// 88/140

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nickd3000

function u(t) {

v=160;for(i=0;i<60*v;i++)l=(i%v),m=((i/v)|0),
k=v*((((S(l/4)*C(m/4))+(t*3)|0))%5),x.fillStyle=R(k*2,k/4,7*m+v-k),x.fillRect(l*20,m*20,20,20)

Feb 1 2018 6:42 PM UTC

}// 140/140

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dot repeater

u/magna

So stylish!
u/sigveseb

Looks great!
u/iverjo

#dots

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New_Core

function u(t) {

for(c.width|=i=25;i--;x.fillRect(M.min(1870,M.max(0,960+400*S(a=t+i/4)+800*S(t))),M.min(1030,M.max(0,540+400*C(a)+400*C(t/3))),50,50))M=Math

Feb 1 2018 12:46 PM UTC

}// 140/140

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Show more comments…
u/benstratton7

Does anybody know how to make this actually bounce off the sides in 140 characters?
u/BirdsTweetCodersDweet

Better resolution if you want : for(c.width|=i=999;i--;x.fillRect(M.min(1870,M.max(0,960+400*S(a=t+i/4)+800*S(t))),M.min(1030,M.max(0,540+400*C(a)+400*C(t/3))),9,9))M=Math
u/Jezza

Love it!
u/Xen

for(c.width|=f=i=400;i--;x.fillRect(M.min(1870,M.max(0,960+f*S(t+i)+800*S(t))),M.min(1e3,M.max(0,540+f*C(t+i)-f*C(t))),9,9))M=Math
u/aleamb

Great!
u/davidsharp

@Xen, you should totally fork it, that looks great
u/New_Core

on Xen's version can remove t+i to i ... no need to spin it if it looks like a line.
u/mylain

kdkdkkd
u/aleamb

amazing!!

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Anthorouss

function u(t) {

c.width=1920
for(i=0;i<10;i++) {
x.ellipse(960, 575, 250, 250*Math.abs(S(t)), (30*i)/t+(i * Math.PI/90), 0, 2 * Math.PI)
x.stroke()
}

Feb 1 2018 4:32 AM UTC

}// 133/140

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DirtyDan

function u(t) {

x.globalCompositeOperation='xor';
x.fillRect(960+910*C(t)-25,540+515*S(t)*C(t)-25,50,50)

Feb 1 2018 3:59 AM UTC

}// 88/140

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DirtyDan

remix of d/6447 by u/DirtyDan

function u(t) {

c.width+=0;p=Math.PI*2
for(i=b=540;i>0;i-=.5)x.beginPath(),x.ellipse(960+760*S(t+i*2.5),i*2+80*S(i/b*p),200,50,i/b*T(t)+t*p,0,p),x.stroke()

Feb 1 2018 3:30 AM UTC

}// 139/140

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DirtyDan

remix of d/6614 by u/akm

function u(t) {

for(i=0,c.width=1920,π=Math.PI*2,r=540;i++<180;a=3*i*S(t),x.ellipse(960,r,a<0?-a:a,r,1.5*i*π/9+i/180*π*t,π*C(t),π),x.stroke())x.beginPath()

Feb 1 2018 3:02 AM UTC

}// 139/140

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Jezza

function u(t) {

c.width|=0;x.font='99px monospace';if(!t)p=3,a=2,o=0,q=2;p+=24/a/(a+1)/(a+3)/(a+=4);x.fillText((p+o).toFixed(15),9,99);if(p>q)p-=q,o+=q;q/=2

Jan 31 2018 10:32 PM UTC

}// 140/140

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I thought I'd see if I can calulate PI in 140 chars. Math.PI is 3.141592653589793, which is 15 decimal places. 15 decimal places is precise enough to calculate the circumference of the solar system (including Pluto) with an accuracy of a meter. The formula is Nilakantha's from the 15th century. You could also just print 245850922/78256779 but doing that doesn't seem much better than just printing Math.PI.

u/donbright

#pi #math

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