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

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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: #Opposites

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donbright

remix of d/1399 by u/Kalanchoe

function u(t) {

c.width^=0
t?o.push({X:1,Y:1,U:S(t),V:C(t)}):o=[]
o.map(a=>{Q=a.X**2+a.Y**2,a.X+=a.U-=a.X/Q,a.Y+=a.V-=a.Y/Q,x.fillRect(a.X,a.Y,9,9)})

Mar 28 2017 1:45 AM UTC

}// 133/140

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Another fake gravity sim. This time, some particles get slingshotted out of the system, past escape velocity, others teeter on the brink, and others congregate at 0,0. After a while, the screen is full of a bunch of particles leaving, and others coming back in towards the origin.

Show more comments…
u/nonce

your gravity sims are amazing.
u/z3vin

agreed
u/donbright

thanks this site is very inspiring
u/alien

WOW ,Hi what does this mean :D c.width^=0
u/donbright

alien it basically clears the screen to the default width. in detail, i think it is combining "binary xor" with "set equal to", so basically c.width = c.width xor 0, and since anything xored with 0 is itself, its basically setting c.width to itself.
u/donbright

#physics

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nonce

remix of d/2312 by u/nonce

function u(t) {

with(x)font='390px Arial',m=t?m:1,c.onmousemove=()=>m++,lineWidth=2,setLineDash([m,1e9]),strokeText(atob("SGVsdmV0aWNh"),3,1e3)

Mar 27 2017 7:02 AM UTC

}// 127/140

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Find the word

u/cantelope

black magic!
u/joeytwiddle

#interactive #text
u/katkip

eval(atob("SGVsdmV0aWNh")) i found it

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sfz

remix of d/2313 by u/tapgiles

function u(t) {

with(x)!t?translate(960,a=540):beginPath(),moveTo(a,0),rotate(9e6*t/~new Date),lineTo(a,0),strokeStyle=`hsla(${t*9},99%,50%,${t%1}`,stroke()

Mar 26 2017 8:08 PM UTC

}// 140/140

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Give it a minute

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u/donbright

i wound up with a golden pentagon, i love it
u/donbright

i wound up with a golden pentagon, i love it
u/tapgiles

Not bad ^^
u/nonce

wow so cool, also great pro tip: you can leave off the ')' in an hsl/hsla string!
u/sfz

found that one by accident
u/z3vin

Parentheses trick doesn't seem work on iPhone safari :(

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tapgiles

function u(t) {

with(x)!t?translate(960,a=540):0,beginPath(),moveTo(a,0),rotate(Math.random()*2-1),lineTo(a,0),strokeStyle=`hsl(${t*100},100%,50%)`,stroke()

Mar 26 2017 7:25 PM UTC

}// 140/140

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Lappi

function u(t) {

c.width=1920;x.font='9em a';
for(i=0;i<300;i++)
x.fillRect(i*5,S(i*5+t*i/200)*400+600,30,30),
x.fillText('🌈',i*5,S(i*5+t*i/200)*400+600);

Mar 26 2017 8:43 AM UTC

}// 139/140

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u/donbright

красава!
u/donbright

oops i think i mean красива

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nonce

function u(t) {

Q=210+~~(t*9)*160
U=(''+u).replace(/[^Q]+/,'')
I=U.split('\n')
N=I[~~(t*9)]
E=x.font='111px monospace'
  x.fillText(N,20,Q)

Mar 26 2017 6:03 AM UTC

}// 124/140

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u/Lazy1337

#quine

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cantelope

function u(t) {

c.width=1920;x.fillStyle="red";g=540;for(i=0;i<g;p=i-t,l=S(p)*i,Z=g-l*C(t),s=g*9/Z,x.fillRect(960+18/(Z*18)*l*S(t)*g,g+C(p)*i/Z*g,s,s),++i);

Mar 26 2017 2:54 AM UTC

}// 140/140

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u/innovati

it's like a sunflower pattern :D

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jick

remix of d/2307 by u/jick

function u(t) {

x.drawImage(c,C(t)*.2-2,S(t)*.2-2,1924,1084);
x.fillStyle=`hsl(${t*15},50%,50%)`
x.fillRect(940+S(t)*200,550+C(t)*190,20,20)

Mar 26 2017 2:05 AM UTC

}// 124/140

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jick

function u(t) {

x.drawImage(c,C(t)*.2-2,S(t)*.2-2,1924,1084);
x.fillStyle=`hsl(${t*15},50%,50%)`
x.fillRect(940+S(t)*300,550+C(t)*290,20,20)

Mar 26 2017 2:02 AM UTC

}// 124/140

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u/donbright

great colors, really cool
u/Finianb1

This is such a trip

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donbright

remix of d/2281 by u/thespite

function u(t) {

c.width=w=1920,h=1080;d=.5;for(X=-d;X<d;X+=.02)for(Y=-d;Y<d;Y+=.02){
Z=t*C(t*t*X*Y);x.fillStyle=R(Z*w);x.fillRect(X*w+1e3,Y*h+540-Z*t,40,9)}

Mar 26 2017 12:53 AM UTC

}// 140/140

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