Dweets awesomed by u/sfz

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: #Opposites

show FPS hide FPS share 1 remix fullscreen

recursive

function u(t) {

c.width=256;
for(X=255;X--;)for(Y=144;Y--;)
if((q=C(X/8+C(t*7))+C(Y/8+S(t*8))-C(t*3)*2)>0?q<.2||X+t*30&4:Y+t*30&4)x.fillRect(X,Y,1,1)

Mar 5 2017 6:27 PM UTC

}// 133/140

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

show FPS hide FPS share fullscreen

p01

function u(t) {

for(c.width|=i=48;i--;x.fillText(['🐸','🌷','☁️️'][k],64*S(k?i:i/9-t),i*3*C(k||i/7-t)))x.setTransform(j=((k=i>>4)*t+48-i)%16,0,0,j,960,540)

Mar 5 2017 3:53 PM UTC

}// 137/140

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

** SPACE HARRIER **

Show more comments…
u/iverjo

LOL, nice :D
u/lienthealien

D: it's incredible. I still don't fully understand whats going on the begginning of the for.
u/p01

Thanks! Touching the width ( or height ) of a canvas resets it. c.width|=i=48; ⇒ Sets i to 48. Does a binary OR of 48 on the width of the canvas and resets ( it mostly clears it ) the canvas
u/sfz

redrawing the canvas and initializing i, nice!
u/lienthealien

p01 are you a wizard?? :v
u/donbright

doesnt seem to like firefox/ubuntu
u/iverjo

Hmm, why can one not do '🐸🌷☁️️'[k]? Is it simply because they are not single-byte characters?
u/p01

@iverjo: Exactly. Although I should have used [...'🐸🌷☁️️'][k] to save 3 bytes
u/andres

emojis exist on two planes of universes
u/AstonC

Phenomenal
u/joeytwiddle

#dragon #worm #game #tribute
u/joeytwiddle

#hiddengem
u/f8f82804

#emoji
u/stephsmith

#smokedweeteveryday
u/geb

#background

show FPS hide FPS share fullscreen

gabrielsroka

remix of d/39 by u/sigveseb

function u(t) {

c.width=1920
with(x)for(translate(960,540),rotate(t/2),i=s=99;a=s*s/(s-i-t%s),i--;)rotate(S(t)/s),fillStyle=R(a/9),fillRect(b=-a/2,b,a,a)

Mar 5 2017 12:46 AM UTC

}// 137/140

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

a few bytes shorter, and fullscreen looks better with c.width=1920

u/iverjo

#tunnel

show FPS hide FPS share fullscreen

p01

function u(t) {

for(x.fillStyle=R(i=c.width|=0);i--;(X*2+t^Y*2)&1||x.fillRect(199*(C(X*.8)*S(Y*=.4)+t%9),960-199*(4*S(t%3.1)-C(Y)),14,14))X=i/11%4,Y=i/240

Mar 5 2017 12:34 AM UTC

}// 138/140

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

u/donbright

amiga lives?
u/donbright

d'oh now i see the original
u/iverjo

#amiga

show FPS hide FPS share fullscreen

p01

function u(t) {

for(x.fillStyle=R(i=c.width|=0);i--;)X=i/11%4-2,Y=i/240-4,(X-t^Y)&1||x.fillRect(99*(S(X*.8)*C(Y*=.4)+t*2%18),960-99*(4*S(t%3.1)-S(Y)),9,9)

Mar 4 2017 9:36 PM UTC

}// 138/140

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

BOING! A 138bytes tribute to the legendary Amiga demo

u/alien

mother of god...
u/joeytwiddle

#sphere #ball #amiga

show FPS hide FPS share fullscreen

aemkei

function u(t) {

c.width^=0;for(i=0;i<499;i++)x.fillRect(900+(S(i/9))*(Z=1e3*(i+t/8)%300*2),500+(S(i*42)*Z),S(i)*20,S(i)*20);

Mar 4 2017 9:30 PM UTC

}// 109/140

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

Supernova

u/iverjo

Spot on :) Supernova was actually the first word that came to mind when I saw the dweet. Then I saw your comment ^^

show FPS hide FPS share fullscreen

scottglz

remix of d/1855 by u/scottglz

function u(t) {

with(x){f=q=>99+q(t)*90;c.width^=0;fillStyle=`hsl(${t*60},66%,50%)`;W=lineWidth=4e3;setLineDash([f(S),f(C)]);rect(0,0,W,W);fill();stroke()}

Mar 4 2017 8:10 PM UTC

}// 139/140

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

show FPS hide FPS share fullscreen

shoguning

function u(t) {

c.width=1920;
for(i=0;i<10;i++)
x.fillRect(800+C(2*t-i/5)*600, 400+400*S(4*t-i/3.), 50/i**0.5, 50/i**0.5)

Mar 4 2017 7:05 PM UTC

}// 105/140

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

u/recursive

nice
u/joeytwiddle

This reminds me of a certain arcade game dragon
u/lionleaf

#organic

show FPS hide FPS share fullscreen

unstructuredmesh

function u(t) {

t||x.translate(960,540);i=t,a=S(i),x.fillStyle=R(100+155*a,0,0,1),x.fillRect(32*i*a*a*a,-2*i*(13*C(i)-5*C(2*i)-2*C(3*i)-C(4*i)),9,9)

Mar 4 2017 6:51 PM UTC

}// 132/140

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

u/FireFly

♥
u/sfz

💗

show FPS hide FPS share 1 remix fullscreen

FireFly

function u(t) {

for(c.width|=M=Math,i=2e4;i--;x.fillRect(A*8,B*8,W=9+M.atan2(M.sqrt(1-X*X-Y*Y),X)*3-t*4&7^4-M.asin(Y)*3,W))X=(A=i%135)/67-1,Y=(B=i/135)/67-1

Mar 4 2017 6:26 PM UTC

}// 140/140

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

Raycasted rotating sphere with UV-mapping!

Show more comments…
u/sfz

... ??? !!!
u/iverjo

Impressive! I like the c.width|=M=Math hack. Apparently Math is evaluated to NaN in the process.
u/iverjo

http://stackoverflow.com/a/11037887/2319697
u/alien

god... i can't understand this yet but is awesome...
u/sigveseb

So good!
u/donbright

standing ovation
u/tomkh

great job! some tricks here really opens new possibilities
u/mxfh

you can do M.sqrt() with ES6 power operator as **.5 should yield a net gain of 2 chars
u/FireFly

Oh right! I haven't gotten used to it yet since I'm on Fx51, which doesn't seem to support ** yet. Thanks!
u/FireFly

Oh, and also thanks for all the positive responses, everyone :)
u/iverjo

#sphere
u/lionleaf

#disco
u/f8f82804

#halftone #dithering #shading

dwitter.net | sfz (8520)