Dweets awesomed by u/Tosmatobeef

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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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

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veubeke

function u(t) {

for(i=1920;a=i--/400;x.fillRect(i,400+t*70+_*15,1,99))_=C(a+t)*3+C(a-t)*8+(r=i*i/t%1),
x.fillStyle=`hsl(${140-t*4+_},80%,${40-t*2-_-r*9}%)`

Mar 5 2017 5:05 PM UTC

}// 140/140

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Show more comments…
u/iverjo

Nice :) This reminds me of the classic Windows XP desktop background image
u/sigveseb

very nice! can we squeeze in a blue sky?
u/veubeke

I’m trying ^^
u/magna

Not enough Unicode cows. Back to work!
u/Beginner

Amazing!
u/FENRIR

windows xp start up sound went to my head
u/iverjo

#grass
u/joeytwiddle

#landscape
u/vain

Cool and interested way to draw this landscape!

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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

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Raycasted rotating sphere with UV-mapping!

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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

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sebbert

function u(t) {

c.width=999;for(a=b=z=0,w=140;z<400;z+=.1)a=S(a*2.4-t)*S(t*2)+C(a+b+t)+C(z*2.34+t),b=C(z*1.56),x.fillRect(a*w+500,b*w+w+w,2,2)

Mar 4 2017 12:59 AM UTC

}// 126/140

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u/donbright

woah!
u/SpecialAgent

Energize!
u/FireFly

This one is really cool o.o
u/FireFly

I would love an explanation or pointer about the maths going on here… in particular I don't understand why the 1.56 constant for the b= is so sensitive. It looks like an approximation of π/2, but all of π/2, 1.57 and 1.5 behave vastly differently/more chaotically. So what's the relationship between these numbers/how is 1.56 derived?
u/tapgiles

What the... @.@ Looks so detailed!
u/joeytwiddle

Some other constants with similar behaviour: 1.17, 2.34, 3.12, 3.51, 3.90, 4.68, 6.24
u/joeytwiddle

And a few with different behaviour: 3.08, 6.05 (!), 6.35

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gormisdomai

remix of d/1273 by u/gormisdomai

function u(t) {

w=99;for(X=-30;X<w;X++)
for(Y=-30;Y<w;Y++){
x.fillStyle=R(99*(X%2),99*(Y%3),0);;
x.fillRect((X+S(t)*Y)*w-200,(Y+C(t)*X)*w-200,w,w)}

Mar 3 2017 10:46 PM UTC

}// 131/140

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Dislocation #4

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New_Core

function u(t) {

c.width=1920;for(i=16;i--;)x.ellipse(1e3+300*S(t+i*.1),500+50*C(t+i*.1),160*S(-i*.5)+160,50*S(i*.1)+5,1.6+.5*S(t*.5),9.5,0,6.3);x.stroke();

Mar 3 2017 3:31 PM UTC

}// 139/140

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u/sfz

wow creative!
u/sfz

reduced it by about 15 bytes in case you want to try to do something else with the extra room: c.width|=0;for(i=16;i--;)x.ellipse(1e3+300*S(t+i/9),500+50*C(t+i/9),160*S(-i/2)+160,50*S(i/9)+5,1.6+S(t)/2,9,0,7);x.stroke()
u/iverjo

So good!
u/sigveseb

is that a pseudo-3D fish? super nice!
u/donbright

marvellous
u/magna

WAAAAT
u/SpecialAgent

Magnificent depth!
u/joseprio

Really impressive :)
u/Kalanchoe

Amazing!
u/ArtsyBiker1

WHOA
u/gautjac

beautiful
u/21medals

Reduced it ±20 bytes and added beginPath() without changing any values:
u/21medals

for(c.width|=i=16;a=i--/10;x.stroke())x.beginPath(),x.ellipse(1e3+300*S(t+a),500+50*C(t+a),160*S(-i/2)+160,50*S(a)+5,1.6+S(t/2)/2,9.5,0,6.3)
u/New_Core

#fish
u/joeytwiddle

#model
u/Cloud

https://www.dwitter.net/d/17352
u/vain

incredible 3d fish

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puckipedia

function u(t) {

c.width+=0,c.onmousemove=d=>a=d.clientX*3;z=(t?z:Array(f=1e3).fill([a=f,0])).map(([w,e],i)=>(x.fillRect(w,i,9,9),[w+e*i/f+e/9,(e*6+a-w)/9]))

Mar 1 2017 7:29 PM UTC

}// 140/140

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Just a wobbly line.

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u/sfz

was staring at this waiting for something to happen longer than I like to admit XD
u/lionleaf

Amazing. Love these interactive ones
u/iverjo

+1 for the physics :D
u/iverjo

mildly entertaining to play with
u/hamptonio

nice!
u/recursive

I learned something new! Destructuring assignment!
u/iverjo

#interactive
u/katkip

#physics

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Tosmatobeef

remix of d/1525 by u/lionleaf

function u(t) {

c.width=2e3;v='Thanks for making Dwitter!';for(i=v.length;i--;)x.font=100+'px Arial',x.fillText(v[i],i*81,540+S(t*10+i)*10)

Feb 28 2017 6:26 AM UTC

}// 123/140

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u/lionleaf

You're welcome! Fun to see activity here :)
u/sigveseb

:D

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5Mixer

function u(t) {

c.width=2e3
n=50
v=25
for(i=0;i<n;i++){o=-t%1*n
q=i*v+o
x.fillRect(q,q,i%2?n:v,i%2?v:n)
x.fillRect(620,590+Math.min(S(t*6)*99,-t*n%n),n,n)}

Feb 26 2017 6:56 AM UTC

}// 139/140

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u/Kalanchoe

Aww, this is really cute. <3
u/Tosmatobeef

heh, this just made me smile
u/5Mixer

Thanks you guys, inspires me to make more stuff :)
u/FireFly

This is really cute indeed, I love it :D
u/iverjo

#bounce

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Tosmatobeef

function u(t) {

f=S(t)*.05;
c.width=1920;for(i=0;i<1180;i++){z=t+(i*f);o=C(z+85)*127+127;x.fillStyle=R(0,o,o);x.fillRect(960*S(z)+960,i-100,100*C(z),100);}

Feb 25 2017 8:44 PM UTC

}// 139/140

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