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

Please log in (or register) to post a dweet (copy-paste the code somewhere safe to save it meanwhile)


    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

show FPS hide FPS share fullscreen

FireFly

function u(t) {

for(c.width|=i=N=t/2+5;i-->0;)x.lineTo(960+C(A=i/N*31.4)*500,540+S(A)*500);x.fill('evenodd')

Aug 24 2017 12:19 PM UTC

}// 92/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/donbright

like magic spell

show FPS hide FPS share fullscreen

magna

remix of d/2588 by u/magna

function u(t) {

w=c.width|=0;x.fillRect(0,0,w,w);x.clearRect(100,470,1720,140);x.fillRect(110,480,1700,120);x.clearRect(120,490,(t-(t|0))*1680,100)

Aug 24 2017 4:07 AM UTC

}// 131/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

dweet player loader mark 2

show FPS hide FPS share 3 remixes fullscreen

FireFly

function u(t) {

for(i=2e3;!t&&i--;Math.random()>(X**2+(Y-4)**2)**.5/6&&f(7)+f(-7))X=i&3,Y=i>>2&7,f=m=>x.fillRect(240*(i>>5&7)+120-X*m,180*(i>>8)+50+Y*7,7,7)

Aug 20 2017 3:53 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Spritegen! Generates 48 random sprites each time the dweet is run (make a change to rerun the dweet)

Show more comments…
u/sigveseb

I love this!
u/alien

wait WHAT !!
u/alien

D: What is going on here!! how
u/iverjo

How does it work?
u/FireFly

It's a dweetification of an older sprite generator of mine. The idea is to take a "mask" of 0..1 floats and filter a grid of random numbers for when num<mask. In this case the mask is based on euclidean distance from centre. This is done for half the sprite, and then the other half is just mirrored
u/FireFly

(You could also view it as flipping a biased coin for each mask value, with the bias given by the mask)
u/FireFly

The same principle would work just as well with larger sprites too, and more exotic/interesting mask shapes. The same rid of random numbers could be applied to different masks, or to an animated mask, to produce an animation between sprites, too!
u/nystrand

so cool!
u/joeytwiddle

Awesome. I love it. Every single one looks like a space invader!
u/iverjo

Interesting technique. Thanks for explaining :) Also, I agree with joeytwiddle
u/jick

Got a link to the original sprite generator?
u/FireFly

I never really wrote it to be shared, so it's all hardcoded and with really ugly code. I put together this animation though: https://twitter.com/FireyFly/status/80072288…
u/statenlogic

Simple, but effective! Makes me want to play 8-bit games again.
u/donbright

genius
u/joeytwiddle

#hiddengem
u/stiaje

#witchcraft
u/tomxor

#bitmap #sprite
u/KilledByAPixel

#generative pixelart
u/KilledByAPixel

#pixelart

show FPS hide FPS share fullscreen

Xen

remix of d/3094 by u/Xen

function u(t) {

for(c.width|=a=139;--a;)x.arc(900+a*C(t*t/a),500+a*S(t*a/9),a*6,-t%4,t%3);
x.fill('evenodd')

Aug 23 2017 1:28 PM UTC

}// 92/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/cantelope

*.*
u/magna

WAT
u/donbright

!!!
u/Xen

you are feeling sleepy....good now send xen a beer :D

show FPS hide FPS share 1 remix fullscreen

magna

function u(t) {

x.clearRect(0,0,S=c.width,C=c.height);x.beginPath();x.arc(S/2,C/2,C/3,0,6.28*-t,1);x.lineCap='round';x.lineWidth=C/20*(1-t);x.stroke()

Aug 24 2017 4:02 AM UTC

}// 134/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

dweet player loader mark 1

u/magna

#dweetplayerloader

show FPS hide FPS share 2 remixes fullscreen

kchplr

function u(t) {

f=frame
'<~ËË~<'.charCodeAt(f/8|0)&1<<f%8|0&&x.fillRect((f/8|0)*9,f%8*9,9,9)

Aug 24 2017 3:27 PM UTC

}// 78/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

A work in progress, I guess ?

u/joeytwiddle

Cute :D f>>3 could save you two chars
u/kchplr

joeytwiddle: good call, it will also definitively help when I'll move to multi-bytes characters
u/Xen

did you a remix ;)

show FPS hide FPS share 1 remix fullscreen

joeytwiddle

remix of d/3090 by u/artfarnaa

function u(t) {

c.width|=k=960;for(a=25;--a;x.arc(k+(b-k)*S(t+b/210)/2,540+(b-k)*C(t/3-b/210)/2,b*3,0,7))f=a+7*t%2,b=f*f,x.moveTo(G=b|0,0);x.fill('evenodd')

Aug 21 2017 3:50 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/artfarnaa

Very nice. Lots of unexplored ideas around this basic algorithm.
u/sigveseb

Looks like the donut from Intrinsic Gravity: http://www.pouet.net/prod.php?which=64756
u/donbright

groove is in the heart...
u/3D.ceffo

Logical mistery tour!
u/joeytwiddle

#tunnel See also: d/15643

show FPS hide FPS share fullscreen

cantelope

function u(t) {

if(!t){w=1080;p=0.618;s=1.5708}with(x)lineWidth/=p,strokeRect(0,0,w,w),arc(w,w,w,s*2,s*3),stroke(),translate(w+w*p,0),rotate(s),scale(p,p)

Aug 21 2017 12:51 AM UTC

}// 138/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

best fullscreen. Couldn't have done it without the help of the dark knight, who prefers to remain anonymous. :)

u/donbright

yeahhhhh!!!!! cool
u/cantelope

there's an odd bug in chrome where if hardware acceleration is disabled, or the dweet appears far down the page, the arcs close their paths and create unwelcome diagonal lines. I have a more robust version but it does not fit in 140b.
u/katkip

#fibonacci

show FPS hide FPS share fullscreen

nystrand

function u(t) {

for(i=c.width+=0;i--;x.fillRect(a*w+1e3,b*w+540,m=w/9-9,m))[a,b,z,w=(z+9+T(t))*19]=t?x[i/3|0]:[S(i),C(i),6*i%8-3],x[i/3|0]=[b+a/77,z,a-b/77]

Aug 19 2017 1:34 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Show more comments…
u/iverjo

Respect!
u/joeytwiddle

Wow!
u/cantelope

unreal!
u/n0va

Impressive!
u/FireFly

This one is really cool! Keep it up! :)
u/p01

👍
u/donbright

oh man!!!
u/nystrand

thanks for all the nice comments!
u/13thptr

#d3 #perspective

show FPS hide FPS share fullscreen

joeytwiddle

remix of d/531 by u/BriSeven

function u(t) {

for(i=600;i--;x.fillRect(X=X+400+c*600>>1,Y=Y+1076*(1-c&1)>>1,4,4),H=H+400*(c+t)>>2)c=(i*t^i)%3,t?x.fillStyle=`hsl(${H},50%,50%)`:X=Y=H=0

Aug 21 2017 4:02 PM UTC

}// 137/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Sierpinksbow

Show more comments…
u/joeytwiddle

i*t^i is a poor but short PRNG
u/sigveseb

Upvote for the colors
u/BriSeven

fantastic
u/joeytwiddle

I forgot to brighten the dull colors. Try 90%,60%
u/donbright

my new favorite sierpinski
u/joeytwiddle

Big brother: https://www.dwitter.net/d/3458
u/joeytwiddle

Another with colour: d/2668
u/iverjo

#sierpinski
u/CocoMeister

#fractal
u/joeytwiddle

#rainbow