Dweets awesomed by u/somehoax

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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rodrigo.siqueira

remix of d/19376 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(`
for(i=5e3;i--;f(250,540,300,t*i))f=(X,Y,s,r)=>s>77?f(X+s*C(r),Y+s*S(r*2),s/2,C(t+i)):x.fillRect(X*2.6,Y,t<3,.8)

Jul 13 2020 4:01 AM UTC

}// 136/140

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Infinity

u/andrea270872

Looks like stone! Very cool.
u/aleamb

wow!
u/sigveseb

Looks like a da Vinci pencil drawing or something

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rodrigo.siqueira

remix of d/19294 by u/katkip

function u(t) {

for(i=1e4;i--;f(0,0,300/(1+i%2),t*i))f=(X,Y,s,r)=>s>1?f(Y+s*S(r),X+s*C(r),s/(2+t%2),r*5):x.fillRect(X+940,Y+540,1,.1*(t<7))

Jul 2 2020 8:16 PM UTC

}// 123/140

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Organic spores 5-symmetry using u/Katkip's new #fractal method

u/tomxor

Amazing! #organic #art
u/katkip

genius
u/ntsutae

love it
u/aleamb

wow!
u/HellMood

I ported this beauty to the fantasy computer TIC-80 =) https://www.pouet.net/prod.php?which=87542

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somehoax

remix of d/18634 by u/jylikangas

function u(t) {

for(i=999;i--;x.fillRect(~x.setTransform(s=2e4/i,C(a=-i-t*t),4,4*s,t%9-9*s*C(a)+i,t%9+9*s*S(a)),1,4,1))x.fillStyle=R(v=99-S(i/99)*44,v,v*t)

Jun 27 2020 7:00 PM UTC

}// 139/140

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pavel

remix of d/10873 by u/yonatan

function u(t) {

for(i=0;Y=i>>5,Y<35;x[o?'clearRect':'fillRect'](0,!x.setTransform(4>>o,-o,2*o,2-o,j%T-Y%2<<6,Y*T+T*S(j*j+9*t)*S(t)**9),T=32,T))o=i%2,j=i++-o

Jun 16 2020 9:14 PM UTC

}// 140/140

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#beesandbombs #uncompressed

u/BuRRak

I love it
u/aleamb

LOVE IT!!!

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rodrigo.siqueira

function u(t) {

!t&&(c.outerHTML=`<b contenteditable onInput=localStorage.T=this.innerHTML>${localStorage.T||"Text editor. Type here, content is saved."}`)

Jun 3 2020 4:26 PM UTC

}// 139/140

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Text editor with auto-save. Type and reload (or come back later). Your edits are stored in this Dweet.

u/rodrigo.siqueira

Shortcuts: control-b (bold), control-i (italic), control-u (underline). You can even paste html in this Dweet.
u/katkip

wow
u/rafroller

So cool ! Nice use of localStorage :)
u/sigveseb

Cool, didn't know that you could do bold, italics etc like that in contenteditable

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pavel

function u(t) {

with(x)for(i=999;i--;fillRect(~setTransform(s=24e3/i,0,0,4*s,960-i+9*s*C(a=i+60*t),540+8*s*S(a)),~rotate(T(a*a)),2,2))fillStyle=R(9,i/4,i/3)

May 4 2020 7:34 PM UTC

}// 140/140

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Underwater #cavern

Show more comments…
u/KilledByAPixel

sick
u/KilledByAPixel

looped https://twitter.com/KilledByAPixel/status/12…
u/pavel

One trick here is f();g();h(-1,-1) is the same as h(~f(),~g()) when f and g return a falsy value, undefined in this case.
u/pavel

Notice how none of the distance variables are based on time, only angles are, yet the distances are changing and nothing is rotating...
u/pavel

Try making the moving a little faster :)
u/pavel

After I wrote this I looked for other dweets using a similar technique and this is the earliest one I've found, and it includes an explanation d/10212
u/KilledByAPixel

Amazing work! I have not seen the ~ before, will be using it a lot now. I tried to explain the 60*t trick in one of my blog posts, https://frankforce.com/?p=7160
u/pavel

That is an amazingly detailed explanation with great visual aids.
u/pavel

To clarify your explanation, any integer time works. 60*t is naturally an integer (ish). frame is one char longer without numerical errors. In general, (n*t|0) works for any n.
u/AndrewK

privet
u/katkip

masterpiece
u/joeytwiddle

I think this also counts as a #tunnel
u/Qwitter

Awesome!

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pavel

function u(t) {

for(i=c.width|=0;j=--i>>5;x.fillRect(960*(z+S(j*j)+r*C(i))/z,3e3*(.2+m*(m<0&&-1)**i)/z,s=--m*9/z,s))m=(t+j/7)%2-1,r=m>0&&m/3,z=2+S(j)+r*S(i)

Mar 25 2020 8:28 AM UTC

}// 140/140

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Reflections on #rain

u/katkip

beautiful
u/aleamb

amazing
u/vain

amazing rain drop fx

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pavel

remix of d/16909 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(x.globalAlpha=.1,0,i=2e3,i);r=--i*S(t/3);x.clearRect(960+r*S(a)*C(i)/z,540-r*S(i)/z,s=z>0&&6/z,s))z=1+r/2e3*C(a=i*i+t/9)*C(i)

Dec 19 2019 11:08 PM UTC

}// 140/140

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#stars #explosion

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pavel

function u(t) {

x.font='9em"';T>-99&T<2e3?c.style.background='#070':(h=300,T=8+t%4<<7,p=q=5+t%9);h-=p-=3;x.fillText('🎴',T+=q&1?q:-q,h>1e3?(p*=-.8,h=1e3):h)

Dec 18 2019 4:43 AM UTC

}// 139/140

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#solitaire

u/username

d/13995

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KilledByAPixel

remix of d/14832 by u/katkip

function u(t) {

c.width|=0
for(i=152;i--;x.fill())for(x.beginPath(k=4);k--;x.arc(60+(i%17)*w,60+(i/17|0)*w,w/1.8-C(-t*2)*w*.05,a=k*1.57+t*(i%2-.5),a))w=120

Jun 29 2019 7:13 PM UTC

}// 139/140

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u/magna

Sick!
u/KilledByAPixel

#spinning #squares

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