Dweets awesomed by u/ntsutae

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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tomxor

remix of d/20657 by u/dnmc

function u(t) {

for(c.width&=i=8320;i--;)
x.fillRect(X=i&127,Y=i>>7,
k=S(8*t+X*X+Y*Y+X*Y)+.5,k)

Nov 18 2020 1:33 AM UTC

}// 79/140

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Nano Snakeskin

u/bandaloo

this is great! i'll definitely be using this substitute for a doubly-nested for loop
u/DataMeta

agreed, cool trick! even more succinct than the nested hack I've been using, and the perf increase from bitwise ops is welcome
u/tomxor

Yes, I've used this so much, I guess it's just more obvious in this one. I've taken technique a step further in d/20707 converting yonatan's 3 loops into one. bitwise can be very powerful to manipulate the variables a loop traverses.

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plusright

function u(t) {

c.width=1980;r=200;n=20;x.fillStyle=R(0,0,0,0.8);for(j=n;j--;)for(i=n;i--;x.fillRect(r+r*S(i+t)*j/2,T(t/j)*r+r*C(i+t)*j/2,r-i*j,r-i*j));

Nov 16 2020 6:41 PM UTC

}// 137/140

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#corruption #asymmetry

u/plusright

adding color is difficult! I want to do more with it but can't beat the character count.
u/Xen

few more bytes for you... c.width|=r=200;for(j=20;j--;x.fillStyle=R(0,0,0,.8))for(i=20;i--;)x.fillRect(r+r*S(i+t)*j/2,T(t/j)*r+r*C(i+t)*j/2,z=r-i*j,z)
u/pavel

x.fillStyle=R(0,0,0,.8) -> x.globalAlpha=.8
u/plusright

nice, thank you both.

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tomxor

remix of d/20584 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪀽𜐹𜠬𤠽𝀸𛁩🐸𜀶𝀻𪐭𛐻𮀮𩡩𫁬𤡥𨱴𚁓𚰹𝠬𥀫𝐴𛁃𚁡👍𨑴𪀮𨑴𨑮𜠨𤰽𪐥𞐷𛑒𛁔👩𛰹𝰭𤠬𬠽𚁓𚡓𚱔𚡔𚐪𚠮𝐩𚠹𚐪𜠰𛑲𙠴𝀦𙡲🠳𝠿𬠼𝀲🱔𛱒𞡓𛱒𞠱𛁲🠳𝠿𬠼𤠺𮠨𜰩𛰵𚐩𮠽𫠽🡮𛐭𙠦𠰨𨐯𜰫𬠫𭀪𞐩𚡃𚁔𛰵𚱺𚁮𚐪𜠩𛑲𛰶`.replace(/u../g,'')))

Nov 14 2020 1:20 PM UTC

}// 139/140

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#stargate connected to a world with a #blackhole

u/tomxor

From "A Matter of Time" episode, requested from u/nbevans on HN.

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ntsutae

remix of d/20532 by u/ntsutae

function u(t) {

X=1e3,Y=X/2
for(c.width|=i=2e3;i--;x[f='fillRect'](X+=C(d*=11),Y+=S(d),9,9),x[f](2e3-X,1e3-Y,9,9))d=S(i/100|t*2+S(i/333+t))*5^0

Nov 13 2020 5:03 AM UTC

}// 127/140

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#symmetry

u/donbright

awesome
u/ntsutae

Thank you
u/sigveseb

Nice

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tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪀽𜐹𜠬𤠽𝀸𛁩🐸𜀶𝀻𪐭𛐻𮀮𩡩𫁬𤡥𨱴𚁓𚰹𝠬𥀫𝐴𛁃𚁍𨑴𪀮𨑴𨑮𜠨𤰽𪐥𞐷𛑒𛁔👩𛰹𝰭𤠬𬠽𚁓𚡓𚱔𚡔𚐪𚠮𝐩𚠹𚐪𜠰𛑲𙠴𝀦𙡲🠳𝠿𬠼𝀲🱔𛱒𞡓𛱒𞠱𛁲🠳𝠿𬠼𤠺𮠨𜰩𛰵𚐩𮠽𫠽🡮𛐭𙠦𠰨𥀯𜠫𤰪𥀯𤠫𭀪𞐩𚡃𚁔𛰴𛑺𚁮𚐪𜠩𛑲𛰶`.replace(/u../g,'')))

Nov 13 2020 1:17 AM UTC

}// 140/140

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#stargate

Show more comments…
u/DataMeta

wow WHAT
u/DataMeta

super rad combo of that fluid/smoke technique from a while back and the recent 2.5D Doom texture tricks!
u/chris@grimtech.net

Is this an incoming or outgoing wormhole? thanks
u/magna

WHAT.
u/sigveseb

Holy smokes!
u/tomxor

https://news.ycombinator.com/item?id=25088683
u/aleamb

brutal! amazing!!!
u/rep_movsd

This is one of the all time greats
u/Xen

Yess!
u/UEZ

Awesome. One rookie question: where are the color values saved?
u/red-lady

Stargate!!
u/tomxor

@UEZ the width and height of fillRect are used, when less than one pixel it will interpolate the alpha channel in proportion to the area. The same happens when an edge lies between two pixels (anti-aliasing).
u/UEZ

@tomxor: thanks for your fast reply. :-) That's what I thought but when will width used, when height? I'm trying to under JS by converting it to FB.
u/UEZ

*understand
u/tomxor

The following are equivalent when the values of w and h are between 0 and 1: fillRect(0,0,w,h) == fillRect(0,0,w*h,1). This is because the alpha channel of this pixel value is roughly proportional to the subpixel area (w*h). In terms of the patern we are trying to create, multiplication it's like the continuous version of AND, i.e the binary version is 1 IF w AND h. Additionally a lot of characters are saved when separating into w and h because we dont need to wrap the actual subexpression used to create w and h in parens and multiply them i.e fillRect(0,0,(.1+.2)*(.3+.4),1) becomes fillRect(0,0,.1+.2,.3+.4), that's -5 chars!
u/UEZ

@tomxor: thx.
u/nystrand

epic!
u/jelmo

Nice
u/vain

Wow! This seems to be your stargate... Seems you are not from this world! Incredible!!!

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ntsutae

remix of d/20301 by u/rodrigo.siqueira

function u(t) {

孒=(乂,丫,卌=0)=>乂*乂>3?卌:孒(1+乂*丫*3,S(乂*乂*40)*Math.abs(乂-丫),卌+36);for(工=山=2e3;工--;x.fillRect(工,t*60,1,色))x.fillStyle=R(色=孒(工/山+.25,t/19-.8),色,色)

Nov 11 2020 3:16 PM UTC

}// 139/140

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#fractal

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MAxSaL

remix of d/20526 by u/dactyl

function u(t) {

c.width|=i=264
for(x.translate(979,550);i--;x.rotate(Math.PI/6*8))x.rect(-1e3,(j=i%100)*25,2e6,C(j/69+t)*200)
x.fill`evenodd`

Nov 10 2020 10:37 PM UTC

}// 125/140

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u/Xen

i like it
u/donbright

great job, great style and shape. interesting
u/MAxSaL

Thanks a lot!

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danny@hille.dk

remix of d/18518 by u/ntsutae

function u(t) {

for(i=c.width=600,x.fillRect(0,0,i,i);i--;)y=(t*333-i)%550,x.fillStyle=`hsl(${i}9,99%,50%`,p=1.01**y+22,x.fillRect(S(i*i+t*9)*p+300,i,9,1)

Nov 10 2020 9:50 PM UTC

}// 138/140

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random remix

u/donbright

nice!!!!

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ntsutae

remix of d/20532 by u/ntsutae

function u(t) {

c.width|=X=1e3,Y=X/2
for(i=2e3;i--;x.fillRect(X+=C(d*=Math.PI/3),Y+=S(d),9,9),x.fillRect(2e3-X,1e3-Y,9,9))d=S(i/84+t-C(i/99-t))*4^0

Nov 10 2020 3:51 AM UTC

}// 132/140

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#symmetry

u/donbright

wild
u/SockTaters

Brilliant! Looks like one of those animations of the inner workings of a cell -- DNA polymerase or something like that #underrated

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ntsutae

function u(t) {

X=1e3,Y=X/2
for(c.width|=i=2e3;i--;x.fillRect(X+=C(d*=Math.PI/2),Y+=S(d),9,9),x.fillRect(2e3-X,1e3-Y,9,9))d=C(i/120+t/5-S(i/99-t/3))*4^0

Nov 9 2020 12:15 PM UTC

}// 137/140

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inspired by https://twitter.com/satoshi_aizawa/status/12…

u/geb

#symmetry

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