Dweets awesomed by u/rybar

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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cantelope

function u(t) {

for(w=i=c.width|=0,x.globalAlpha=.15;i--;x.fillRect(w/2+S(p=Math.PI*2/6*i+S(t/5)*3e3/i*S(t)+t)*(d=i*i/1e3)-s/2,540+C(p)*d-s/2,s,s))s=i*i/5e3

Sep 13 2017 5:44 AM UTC

}// 140/140

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u/nystrand

nice!
u/Butonix

dacsdvsdvsdvs

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Xen

function u(t) {

Z=4
for(Y=(X=(s=330)*2)/2,n=i=39;i--;X+=C(t)*n+s/n+6,Y+=S(t)*n+s/n+6)x.fillRect(X,Y,s*=.95,s),x.fillStyle=`hsla(${s*t*Z},99%,50%,.07)`

Sep 11 2017 8:44 PM UTC

}// 134/140

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Raise 'Z' as high as you dare...sit back and stare fullscreen.

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Xen

function u(t) {

x.beginPath(x.shadowColor=R(X=x.shadowBlur=599,X*C(t),X*S(t)));x.arc(X+C(t*9)*X*S(t),X+S(t*8)*X*C(t/3),69,0,7);x.fill()

Sep 7 2017 10:14 PM UTC

}// 119/140

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the original of this was accidently deleted LOL

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Xen

function u(t) {

for(j=0;j<9;++j){x.fillStyle=`hsl(${Z=t*t%255},99%,50%`;for(i=9;i--;x.fillRect(960+S(p=t/j+9*i-S(t)/(j%2?-2:2))*Z*j,540+C(p)*Z*j,p,p));}

Aug 31 2017 9:29 PM UTC

}// 136/140

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a failed attempt to golf one of cantelopes...

u/cantelope

looks like a win to me :D
u/Xen

https://codegolf.tk/a/44
u/Xen

i gave up keeping it the same at 200bytes lol, i'm too lazy

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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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alien

function u(t) {

W=c.width=200
b=x.getImageData(0,0,W,W)
d=b.data
for(i=0;i<d.length;i+=4){
d[i+3]=255
d[i|(i+frame*W>>75)]=150*S(t)
}x.putImageData(b,0,0)

Aug 20 2017 10:16 AM UTC

}// 138/140

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Glitching...

u/sigveseb

cool!
u/donbright

need to turn the knobs on the back of my wood panelled 70s tv set
u/donbright

or maybe the tracking on my vhs player

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leonarven

function u(t) {

for(i=w=c.width=600;i--;)x.fillRect(w/2+C(t+i)*S(i/97)*w/6,w/3+S(i/1)*w/6,3,3)

Aug 19 2017 3:17 PM UTC

}// 78/140

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leonarven

function u(t) {

for(i=w=c.width=600;a=C(t+i)*S(t/19),b=S(i/11)+C(t+i+3)*S(i/13+3)/9,i--;)x.fillRect(w/2+a*100,200+b*200,s=4-2*Math.sqrt(a**2+b**2),s)

Aug 19 2017 3:10 PM UTC

}// 133/140

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Not what I was originally doing x)

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nystrand

function u(t) {

for(i=c.width+=0;i--;x.fillRect(a*w+1e3,b*w+540,m=w/9-9,m))[a,b,z,w=(z+9+T(t))*19]=t?x[i/3|0]:[S(i),C(i),6*i%8-3],x[i/3|0]=[b+a/77,z,a-b/77]

Aug 19 2017 1:34 PM UTC

}// 140/140

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Show more comments…
u/iverjo

Respect!
u/joeytwiddle

Wow!
u/cantelope

unreal!
u/n0va

Impressive!
u/FireFly

This one is really cool! Keep it up! :)
u/p01

👍
u/donbright

oh man!!!
u/nystrand

thanks for all the nice comments!
u/13thptr

#d3 #perspective

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