Dweets awesomed by u/BriSeven

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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New_Core

function u(t) {

for(x.shadowOffsetX=c.width|=i=5;i--;x.fill())x.shadowBlur=g=i*90,x.beginPath(),x.arc(a=-1e3+g/2,t*t-a/t,-a/3,0,7),x.shadowColor=R(0,g,g,.3)

Nov 10 2017 3:46 PM UTC

}// 140/140

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New_Core

remix of d/3487 by u/BriSeven

function u(t) {

t?0:(X=80,Y=0)
for(i=9;i--;x.fillRect(X+i*220,Y,5,5))
X+=S(C(t)*11)/3
Y-=C(S(t)*11)*3

Nov 9 2017 3:29 PM UTC

}// 85/140

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BriSeven

remix of d/3487 by u/BriSeven

function u(t) {

t<0.1?(x.x=0, x.y=1000,j=5.5):null;
for(i=0;i<10;i++)m=t*3,
x.fillRect(x.x+i*300, x.y, 5, 5);
x.x+=8*S(C(m)*j), x.y+=8*C(S(m)*j);

Nov 8 2017 11:37 AM UTC

}// 131/140

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BriSeven

function u(t) {

t<0.1?(x.x=0, x.y=1200,j=11):null;
for(i=0;i<10;i++)m=t*2,
x.fillRect(x.x+i*200, x.y, 5, 5);
x.x+=4*S(C(m)*j), x.y+=4*C(S(m)*j);

Nov 8 2017 11:11 AM UTC

}// 130/140

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change j for different patterns

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Xen

remix of d/1201 by u/bligglenuber

function u(t) {

x.fillStyle=`hsl(${(t*=5e2)/2},80%,50%)`
x.globalCompositeOperation='difference'
x.fillRect(t%1920,t%1080,9,9)
x.drawImage(c,0,9)

Nov 3 2017 8:09 PM UTC

}// 129/140

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it's raining rainbow sierpinski triangles!

u/zanella

I just did https://www.dwitter.net/d/4677, but yours kicked the hell out of mine. :D
u/Xen

thank you :-)
u/f8f82804

#rainbow #fractal

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magna

remix of d/3409 by u/magna

function u(t) {

t||(a=Array(w=3e3).fill(0));x.rotate(T(t)*3e-4);for(i=w;i--;x.fillStyle=R(c,0,c=S(i)*255,.3),x.fillRect(i,a[i],99,1))a[Math.random()*w|0]++

Oct 30 2017 2:45 AM UTC

}// 139/140

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Xen

remix of d/3101 by u/kchplr

function u(t) {

f=frame
'p}¶¼<¼¶}p'.charCodeAt(f/8|0)&1<<f%8|0&&x.fillRect((f/8|0)*9*11,f%8*9*11,99,99)

Aug 24 2017 11:50 PM UTC

}// 89/140

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joeytwiddle

remix of d/531 by u/BriSeven

function u(t) {

for(i=600;i--;x.fillRect(X=X+400+c*600>>1,Y=Y+1076*(1-c&1)>>1,4,4),H=H+400*(c+t)>>2)c=(i*t^i)%3,t?x.fillStyle=`hsl(${H},50%,50%)`:X=Y=H=0

Aug 21 2017 4:02 PM UTC

}// 137/140

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Sierpinksbow

Show more comments…
u/joeytwiddle

i*t^i is a poor but short PRNG
u/sigveseb

Upvote for the colors
u/BriSeven

fantastic
u/joeytwiddle

I forgot to brighten the dull colors. Try 90%,60%
u/donbright

my new favorite sierpinski
u/joeytwiddle

Big brother: https://www.dwitter.net/d/3458
u/joeytwiddle

Another with colour: d/2668
u/iverjo

#sierpinski
u/CocoMeister

#fractal
u/joeytwiddle

#rainbow

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cantelope

function u(t) {

if(!t){w=1080;p=0.618;s=1.5708}with(x)lineWidth/=p,strokeRect(0,0,w,w),arc(w,w,w,s*2,s*3),stroke(),translate(w+w*p,0),rotate(s),scale(p,p)

Aug 21 2017 12:51 AM UTC

}// 138/140

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best fullscreen. Couldn't have done it without the help of the dark knight, who prefers to remain anonymous. :)

u/donbright

yeahhhhh!!!!! cool
u/cantelope

there's an odd bug in chrome where if hardware acceleration is disabled, or the dweet appears far down the page, the arcs close their paths and create unwelcome diagonal lines. I have a more robust version but it does not fit in 140b.
u/katkip

#fibonacci

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FireFly

function u(t) {

for(i=2e3;!t&&i--;Math.random()>(X**2+(Y-4)**2)**.5/6&&f(7)+f(-7))X=i&3,Y=i>>2&7,f=m=>x.fillRect(240*(i>>5&7)+120-X*m,180*(i>>8)+50+Y*7,7,7)

Aug 20 2017 3:53 PM UTC

}// 140/140

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Spritegen! Generates 48 random sprites each time the dweet is run (make a change to rerun the dweet)

Show more comments…
u/sigveseb

I love this!
u/alien

wait WHAT !!
u/alien

D: What is going on here!! how
u/iverjo

How does it work?
u/FireFly

It's a dweetification of an older sprite generator of mine. The idea is to take a "mask" of 0..1 floats and filter a grid of random numbers for when num<mask. In this case the mask is based on euclidean distance from centre. This is done for half the sprite, and then the other half is just mirrored
u/FireFly

(You could also view it as flipping a biased coin for each mask value, with the bias given by the mask)
u/FireFly

The same principle would work just as well with larger sprites too, and more exotic/interesting mask shapes. The same rid of random numbers could be applied to different masks, or to an animated mask, to produce an animation between sprites, too!
u/nystrand

so cool!
u/joeytwiddle

Awesome. I love it. Every single one looks like a space invader!
u/iverjo

Interesting technique. Thanks for explaining :) Also, I agree with joeytwiddle
u/jick

Got a link to the original sprite generator?
u/FireFly

I never really wrote it to be shared, so it's all hardcoded and with really ugly code. I put together this animation though: https://twitter.com/FireyFly/status/80072288…
u/statenlogic

Simple, but effective! Makes me want to play 8-bit games again.
u/donbright

genius
u/joeytwiddle

#hiddengem
u/stiaje

#witchcraft
u/tomxor

#bitmap #sprite
u/KilledByAPixel

#generative pixelart
u/KilledByAPixel

#pixelart

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