Dweets awesomed by u/stiaje

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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lurifax

function u(t) {

for(i=c.width=480;--i;)for(j=3;j--;){y=C(j+i/200)*S(t+S(i/200))*100+125+10*j;x.fillStyle=R(0,j*16+96,S(t)*32+200);x.fillRect(i,270-y,1,y)}

Sep 27 2017 10:03 PM UTC

}// 138/140

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Is it the motion of the ocean?

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Starchaser

function u(t) {

c.width=1920;for(i=20;i--;x.fillStyle=R(50,0,i*9)){x.setTransform(1,0,0,1,960,540);x.rotate(.314*i-t);x.fillRect(-12,150+T(t+i*3)*25,24,85)}

Sep 27 2017 4:03 AM UTC

}// 140/140

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u/innovati

Beautiful! 🌀
u/magna

This is great!
u/stiaje

How do I get this as a loading spinner for my website? :D
u/donbright

cooool

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Xen

remix of d/1945 by u/jes5199

function u(t) {

c.width=900;for(a=-0;a<99;a++)for(b=0;b<54;b++){n=255*S(C(a)*C(b)*t*9);x.fillStyle=R(n,0,-n,.7);x.fillRect(a*9,b*9,Z=C(t)+9,Z)}

Sep 22 2017 9:33 PM UTC

}// 127/140

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nystrand

function u(t) {

with(x)for(translate(t?S(t):m=993,t?0:540),i=m;i--;fillRect(-m,i+z,3e3,8+z/22))fillStyle=R(z=m/((i*i-t*9)%m),z*3,rotate(-T+(T=i+S(t/9))),.3)

Sep 1 2017 10:41 PM UTC

}// 140/140

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Show more comments…
u/Xen

reminds me of spiderman intro, nice one!
u/cantelope

whaaaaaa
u/sigveseb

Really cool
u/magna

Wow!
u/joeytwiddle

Great!
u/iverjo

Wow!
u/Xen

had to have a play, done remix :)
u/alien

Can some one explain what the with(x) is doing ? please :)
u/lionleaf

Wow! That looks amazing. Love what looks like a white cube that vanishes in the beginning too.
u/nystrand

@alien: with(x) puts x in the scope so that you don't have to write the "x." part of x.fillRect, x.translate etc. So, it only saves bytes if you have more than 3 functions in x you want to call.
u/N0va

Very nice!
u/joeytwiddle

Cyber Fibers
u/katkip

wait wot
u/marc8

Really 3D on a large screen

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cantelope

function u(t) {

for(c.width|=i=12;i--;x.stroke())x[i-5?'lineTo':'moveTo']((w=990)+(C(q=i<6?-t:3-t)+S(p=2.513*i+t)*S(t))/(Z=S(q)+3+S(p)*C(t))*w,540+C(p)/Z*w)

Aug 29 2017 8:11 PM UTC

}// 140/140

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Xen golfed the last 5 bytes. Cheers!

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u/Xen

not a problem ;) you golfed all the first ones... :D
u/donbright

wireframe king
u/cantelope

@donbright, are you challenging me to make something different? I accept!
u/donbright

we are not worthy
u/cantelope

oh u
u/cantelope

@donbright, i did not mean for my statement regarding a challenge to sound arrogant, but I see it came across that way. I just meant, you are correct that i do a lot of wireframe dweets, and I'm enthusiastic about trying something new! I hope we're good. Love your work!
u/Xen

its hard to figure the emotion behind a comment sometimes, which is why i ALWAYS spam mine with smileys ;-)
u/donbright

no its fine, my words dont come across in ASCII very well
u/donbright

i am in awe of everyone here, my mind constantly boggles at the skill and techniques of all of the people here. i have a special affinity for wireframe for some reason.
u/donbright

i mean i like looking at wire frame, but im not that good at making it, so its cool to see it.
u/cantelope

ah <3

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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)

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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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FireFly

function u(t) {

for(i=7e3;i--;x.fillRect(X*20,Y*20,20,20))X=i%96,Y=i>>7,x.fillStyle=`hsl(${X>>4<<6},99%,${(X&&X%16<15&&S(X*.4+t)*3+48>Y&&!!Y*2-(4<Y))*50}%)`

Aug 13 2017 11:34 PM UTC

}// 140/140

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Rainbow banners!

u/sigveseb

Damn sweet!

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New_Core

remix of d/3029 by u/cantelope

function u(t) {

x.globalAlpha=.2;for(x.fillRect(0,0,2e3,2e3),W=j=980;--j;x.clearRect(W+S(p=t+j-5.3*V)/Z*W-Z*-9,540+C(p)/Z*W,s=60/Z,s))Z=j%98-t*6+(V=t*6|0)

Aug 7 2017 10:55 AM UTC

}// 138/140

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in the j%98 try also %83.1,%88,%104

u/cantelope

nice!
u/sigveseb

pretty sweet tunnel!
u/New_Core

#tunnel

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cantelope

function u(t) {

for(x.fillRect(0,0,2e3,2e3),W=960,j=99;--j;)for(i=3;i--;x.clearRect(W+S(p=2.1*i+j/9-6.17*V)/Z*W,540+C(p)/Z*W,s=99/Z,s))Z=j-t*6+(V=(t*6)|0)

Aug 7 2017 2:58 AM UTC

}// 138/140

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FireFly

remix of d/3005 by u/FireFly

function u(t) {

for(i=5e3;Z=(i--%4>1)+i/128;i%4||x.beginPath(x.fill()))X=i%128+2>>2,x.fillStyle=R(Y=S(X*X/32+Z*Z/32-X-Z-t*6)*80+99),x.lineTo(X*60,Z*35-Y)

Aug 3 2017 9:03 PM UTC

}// 137/140

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Ripples! With proper quads instead. Add +Z*X-Z*16 after X*60 for perspective projection too (brings it up to 146)

u/FireFly

Another byte can be saved with with(x), but this causes a fair bit of slowdown for me. Thanks for some golfing tips from qfox and others on the jsgolf slack :)
u/cantelope

can't stop watching. def in my top 10 favs
u/iverjo

Very impressive!

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