Dweets awesomed by u/magna

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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Jenky

function u(t) {

t||(n=c.cloneNode(0),c.parentNode.replaceChild(n,c),g=n.getContext("webgl"))
g.clearColor(.7+.3*S(t*4),0,0,1)
g.clear(16384)

Apr 19 2017 9:49 AM UTC

}// 124/140

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WebGL, anyone? :D

u/Jenky

Kinda sucks it takes so many bytes to set up, anyone have ideas to shorten?
u/magna

Just keep drawing the new, off-screen canvas onto the existing 2D context seems to work (though, is probably inefficient): https://www.dwitter.net/d/2535

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magna

function u(t) {

c.width|=0
x.font=f='60px monospace'
for(Y=18;Y--;)for(X=32;X--;)x.fillText(X<8?(t+Y<<3>>28-X*4&15).toString(16):-~X%3?0:'',X*40,-~Y*60)

Apr 19 2017 6:47 AM UTC

}// 136/140

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Hexdump of the void

u/magna

This portion can be used in an operator precedence quiz: t+Y<<3>>28-X*4&15

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prawnwarp

function u(t) {

c.width|=0;x.lineWidth=5;r=500;a=960;b=540;x.moveTo(a,b);for(i=1;i<23;i+=2){a+=C(t*i)*r/i;b+=S(t*i)*r/i;x.lineTo(a,b);}x.stroke();

Apr 19 2017 5:07 AM UTC

}// 130/140

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More iterations on the Fourier expansion

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Polyducks

function u(t) {

x.fillRect(0,0,1920,1080)
x.font = "60px A"
W=S(t)*600;H=T(t/10)*200;for(i=0;i<20;)x.fillText("👾",((100*(++i%5))+700)+W,(100*(i%4))+200+H)

Apr 18 2017 6:42 PM UTC

}// 139/140

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SPACE INVADERS

u/Polyducks

Weird... I wonder why it's stopped working...
u/magna

It still works for me. macOS + Chrome.
u/joeytwiddle

MacOS and Chrome here. The unicode char (was it 👾?) appears to get stripped while loading. If I paste it in between the "", then it works. Perhaps Dwitter loads differently on different pages?

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eruonna

remix of d/2522 by u/magna

function u(t) {

c.width|=0
t?0:n=0
onkeyup=e=>n++
x.font='50px monospace';
((u+'').slice(0,n%154)+' |'[t&1]).split('\n').map((r,i)=>x.fillText(r,0,++i*50))

Apr 18 2017 6:27 PM UTC

}// 139/140

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Hacker typer

u/sigveseb

nice
u/magna

Can be used when your boss catches you looking at dwitter.net at work.

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Polyducks

function u(t) {

L=(X,Y,X1,X2)=>{x.beginPath();x.moveTo(X,Y);x.lineTo(X1,X2);x.stroke()}
if(t<16){L(S(t)*1000,S(t)*1000,T(t)*1000/S(t),t*100)}

Apr 18 2017 6:04 PM UTC

}// 125/140

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_A stone wall by the sea_

u/Polyducks

I'll work out how to do bold text soon, I swear...
u/tapgiles

The first comment is automatically made bold ;P
u/tapgiles

Looks cool. Wish the line wouldn't disappear for so long, though...

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Jenky

remix of d/2522 by u/magna

function u(t) {

c.width|=i=0
x.font='50px monospace';((u+'').slice(0,t*4+S(t)*6)+`
|`[t*2&1]).split(`
`).map(r=>x.fillText(r,0,++i*50))

Apr 18 2017 4:57 PM UTC

}// 119/140

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You could keep it as +' |' instead of +<return>| but hey, we want to see the whole thing, right? :D

u/magna

Excellent use of `!

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MrM@_S

function u(t) {

if(!t)c.width-=d=i=400
onkeydown=e=>{r=e.keyCode;d+=r==65?-1:r==68?1:0;i+=r==74?-1:r==76?1:0;if(r==32)c.width^=0}
x.fillRect(d,i,3,3)

Apr 18 2017 12:52 PM UTC

}// 133/140

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etch-a-sketch A and D as the left knob and J,L as the right knob. Space for a clear

u/Polyducks

This is so smart! Have you drawn anything with it?
u/MrM@_S

sort of...but not anything that great
u/joeytwiddle

Very cool!

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magna

remix of d/2516 by u/magna

function u(t) {

c.width|=0
x.font='50px monospace';
((u+'').slice(0,t*3+S(t)*5)+' |'[t*2&1]).split('\n').map((r,i)=>x.fillText(r,0,++i*50))

Apr 18 2017 12:29 PM UTC

}// 123/140

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Slimmer version of "pair programming nightmare"

Show more comments…
u/magna

Challenge: Add occasional mistakes like skipped characters / typos etc.
u/Polyducks

I'm struggling to understand how this works. Where have you got the function input from? Amazingly realistic!
u/Jenky

It's from (u+'') - afaik, it's basically a short/cheat way of converting anything to a string in JS :D
u/Jenky

Also, down to 119 and whole string within canvas - https://www.dwitter.net/d/2524
u/magna

@Jenky Nice!
u/magna

#quine

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Polyducks

function u(t) {

c.width=1920
x.fillRect(0,0,1920,1080)
x.fillStyle="#AAAAFF"
for(i=0;i<20;i++){
  a=T(t+i)*10
  x.fillRect(888*i%1920,a,20,a)
}

Apr 18 2017 8:33 AM UTC

}// 127/140

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*RAIN DROPS*

u/magna

*JAW DROPS*
u/Jenky

Like melting ice :o
u/Polyducks

Aww thanks you guysss!

dwitter.net | magna (131939)