Dweets awesomed by u/nyarmith

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

Citiral

remix of d/3693 by u/Citiral

function u(t) {

  c.width=1920;s=40;for(i=0;i<1920;i+=s){for(j=0;j<1080;j+=s){f=s*(S(1.5*t+i+j)+1.1)/2;x.fillRect(i+f,j+f,s-f*2,s-f*2)}}

Dec 26 2017 8:34 PM UTC

}// 120/140

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

u/sigveseb

this looks nice!

show FPS hide FPS share fullscreen

whackashoe

function u(t) {

for(w=c.width=398,a=[A=Y=t^w];A<1e4;a=[X=0].concat(...a.map(v=>{x.lineTo(X+=C(A+=v),Y+=S(A));return v?v:[0,1,0,5,0,5.6,0,1,0]})));x.stroke()

Nov 22 2017 2:04 PM UTC

}// 140/140

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

Garbled snowflake tour

show FPS hide FPS share fullscreen

whackashoe

remix of d/3551 by u/whackashoe

function u(t) {

f=a=>[c.width^=0].concat(...a.map((v,i)=>[[t*S(i),0,0,0,0,0]][v])),f(f(f(f([0])))).map((a,i)=>x.rotate(a*S(i)/9,G=T(i))|x.fillRect(i,i,G,G))

Nov 22 2017 10:14 AM UTC

}// 140/140

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

Accident in space #2

u/katkip

#tagfail

show FPS hide FPS share fullscreen

marc8

function u(t) {

c.width=k=192**(2*Math.random()-1)
x.font=k/1.7+"px sans"
x.strokeText("☥⚚♒π♀☠♉⛇⛩☯∞♊⚤∄☦♋∉⚥♆↉☢Ψα⛧ω♌⚧⛪☣☤6☭♓⛎☮♛♠⚛"[k%38|0],k/4,k/2.2)

Nov 21 2017 11:11 PM UTC

}// 130/140

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

David Lynch & Nine Inch Nails inspired. Epilepsy warning.

u/Xen

love it, think we past the warning with some of mine lol
u/Qwitter

Nice! Hollywood perfect

show FPS hide FPS share 1 remix fullscreen

mmastrac

function u(t) {

t?0:M=[];for(f=w=62,i=500;i--;)M[i]=x.fillRect(w*(i>>4),w*(i%16),w,w,x.fillStyle=R(e=M[i]))||t?f&&e>(z=M[i+1])?(M[f--,i+1]=e,z):e:i**6%256

Oct 30 2017 6:10 PM UTC

}// 138/140

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

Bubble sort visualizer

u/sigveseb

really nice
u/lionleaf

Brilliant
u/katkip

Awesome

show FPS hide FPS share 2 remixes fullscreen

magna

remix of d/3408 by u/magna

function u(t) {

t||(a=Array(w=3e3).fill(0));x.rotate(S(t)*1e-4);for(i=w;i--;x.fillStyle=R(T,T=S(i)*255,T,.3),x.fillRect(i,a[i],9,1))a[Math.random()*w|0]++

Oct 30 2017 2:34 AM UTC

}// 138/140

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

Textile

u/crimbles

If The Matrix was a blanket

show FPS hide FPS share 1 remix fullscreen

cantelope

function u(t) {

for(w=(c.width|=i=2e3)/2;i--;x.fillRect(w+(i%1e3-500)/120/(Z=3+C(p))*w,540+S(p)/Z*w,s=250/Z/Z,s))p=i/79.6+C(t/2)*12+(i>1e3?3.1:0);x.stroke()

Oct 28 2017 5:57 AM UTC

}// 140/140

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

doh. left x.stroke() in there by mistake.

u/katkip

#curve

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

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 1 remix fullscreen

artfarnaa

function u(t) {

 for (c.width|=a=200;--a;x.arc(960+S(G+t)*400,
 540+C(t+G*1)*400,a%2*137*Math.abs(S(t))*4,0,
 6.2832))x.moveTo(G=a/2|0,0)
 x.fill('evenodd')

Aug 8 2017 1:52 AM 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/kchplr

Great !
u/sigveseb

Awesome!
u/ninerdelta

stupid question, but why c.width|=a=200? I was tinkering with this code and just made it a=200 and the fps drops significantly.
u/kchplr

ninerdelta: I think that the reason is that c.width|=something is not only clearing the canvas but also the 2d context. Without it each iterations keeps adding arcs to the current path, by the 10th frames there are 2000 arcs to redraw, by the 50th frames there are 10000, etc. In a, err, "non-cold golfing codebase" you could avoid this by using beginPath and closePath.
u/kchplr

"cold golfing", superb. I meant code golfing...
u/ninerdelta

ah that makes sense, thanks!
u/donbright

now this is fine work

dwitter.net | nyarmith (5159)