Dweets awesomed by u/stephanegeorget

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: #Food

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yonatan

remix of d/23968 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𦀽𭀿𦀫𬠪𝐰𞠰𒡦𫱲𚁩👨🐳𝐰𚰱𞐹𚡃𚁴𚠴𚱘𙐱𚑼𜀻𛐭𪐻𮀮𩡩𫁬𤡥𨱴𚁴🱘𛑷𚱷𚡲𞡩𚠶𛑨𛁴🰶𜀰𚰨𬠪𞀥𝁼𜀿𪐭𪀺𪀭𪐩𞡲𚠱𜀸𜀬𭀿𭰺𪀬𭀿𜰺𪀯𝰩𚑲👍𨑴𪀮𬡡𫡤𫱭𚁷👩𛰴𚐬𮀮𩡩𫁬𤱴𮑬𩐽𤠨𪀯𝀭𪐯𜠬𬠪𞐹𛁴🰰𞠹𞐩`.replace(/u../g,'')))

Oct 1 2021 12:56 AM UTC

}// 130/140

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u/magna

OMG!
u/danny@hille.dk

Very impressive, and beautiful
u/sigveseb

The way the sky and the water go together

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KilledByAPixel

remix of d/23964 by u/KilledByAPixel

function u(t) {

X=t?X+r*50:0
for(i=h=350+199*C(t*4+X%1)|0;--i;x.fillRect(t?X-w+w*r:i*8,t?600+(r*8%4|0?i-h:h-i):r*1080,t?w:500,t?2:r*2))r=Math.random(w=i/4)

Sep 30 2021 11:28 PM UTC

}// 139/140

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Tree Lake #uncompressed

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u/rep_movsd

#art
u/magna

This is #art in several different ways.
u/magna

You could have waited a day and post this as #inktober
u/danny@hille.dk

Love it!
u/sigveseb

Stunning!
u/smtsjhr

wonderful
u/FireFly

awesome \o/

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rodrigo.siqueira

remix of d/23896 by u/rodrigo.siqueira

function u(t) {

for(i=5e4,w=960;i--;x.fillRect(w+w*X/Z,w*Y/Z/2-Z*640-3e3,8/Z/Z,t<3))r=Math.random,X=r()*20-9,Y=r()*20-9,Z=(s=S(s=S(X*Y)+X*X+Y*Y+7)/s)**.2-6

Sep 22 2021 4:06 PM UTC

}// 139/140

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Circular layers

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rep_movsd

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪁼👙👌🐳𜐴𛁏🐹𞐬𮀮𭁲𨑮𬱬𨑴𩐨𞐶𜀬𝐴𜀩𒡔👦𬡡𫑥𙑌𚠲𛁋🐨𥀼𣀩𚡔𚰫𛁋𯁼𮀮𬡯𭁡𭁥𚁔𛱏𚐊𡀽𚁘𛁗𚐽🡸𛡦𪑬𫁒𩑣𭀨𦀬𦐬𥱼𜠬𞐩𒡦𫱲𚀻𦐾𛑌𞰩𥰽𛐨𢠽𣰭𠰨𦐭𛐯𣰩𚡏𚰴𚐪𜠬𦐪𦐾𞁥𝁼𦐾𣀭𢱼𚁙🀰𙡙🡋𛑌𚐿𡀨𢠬𥰩𞡄𚁊𚐬𡀨𢠫𥰩`.replace(/u../g,'')))

Sep 9 2021 9:11 PM UTC

}// 140/140

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Hourglass #time

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rep_movsd

function u(t) {

eval(unescape(escape`𤀽𣰽🡸𛡦𪑬𫁒𩑣𭀨𣰬𮐽𦐭𤰨𨐽𦀯𦠭𛠵𚐪𦀯𝀬𜰬𥀿𜰺𦀽👚𯁼𦀽👗𛐱🰱𝠺𝀪𚁃𚁆𚡏𚡹𚐾𛠸𙠦𦐥𜐶𙠦𨐾𛠷𙠦𨐼𜠮𝰦𙡙🡚𚰶𞐦𙡙🀹𜀰𚐩𒡙🐨𡠽𩡲𨑭𩐩𙐹𞐪𞀫𚁚🐲𞀰𚐬𥀽𦐼👚𯁼𦐾𚁗🐹𝠰𚐊𩡯𬠨𦀽𦠻𡠼𜐰𜀦𙡘🁗𞱘𚰫𚑐𚁘𚐬𤀨𜐹𜠰𛑘𚐻`.replace(/u../g,'')))

Sep 4 2021 9:16 PM UTC

}// 139/140

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The book of dweet

u/neimad

very nice
u/tomxor

Great idea
u/KilledByAPixel

now that's what i call a good book!

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tomxor

remix of d/23544 by u/pavel

function u(t) {

for(a=Math.abs,c.width&=i=4352;X=1-(T+i/32)%2,Y=--i/2e3;x.fillRect(X*r+64*T,Y*r+96-64*a(S(t)),T=a(2-t%4)+1,(i^i/64)/8&1))r=64/(--Y*Y+X*X+1)

Aug 13 2021 12:57 AM UTC

}// 139/140

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Smoother #Amiga #Ball

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u/tomxor

..But less authentic. Remaps the pixel positions rather than texture, which gives "free" antialiasing, with spare space to correct the spin.
u/pavel

Oh yeah, nice. This is definitely a better way of doing it. The other mapping has an incorrect center that I have to waste characters to correct.
u/pavel

-2 char using S(t%3.14) to bounce and inlining the single Math.abs call
u/danny@hille.dk

What a clever trick, using modulus pi of t, to only get the positive part of the sinus curve
u/danny@hille.dk

3.2 works fine, while 3 and 3.1 looks wrong
u/danny@hille.dk

test code: c.width|=0,x.fillRect(o=860,o-S(t*4%3.2)*o,200,200)

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rep_movsd

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼👄🐹𞐬𥰽𝠸𛁫🐸𞱫𛐭𞰩𩡯𬠨𬀽𚀨𩀽𡁡𭁥𚀩𦱫𚰨𪐽𢀽𜐶𚑝𚐼𙰺𙰩𚡗𞱩𛐭𞰩𘣫񀁺񎃑𾒻񂃻񎐢𛡣𪁡𬡃𫱤𩑁𭀨𬀿𩀺𭀥𜐾𛠵🱗𞠱𚐦𜐼🁩𙠦𮀮𩡩𫁬𤡥𨱴𚁗𚡫𚠲𚰨𪐾𝐩𚡄𚰨𠠽𪐯𜰦𜐩𚡈𚱰𛰲𛁄𚰨𪐥𜰩𚡄𚰡𠠪𢀭𬀯𜠬𢀫𠠪𬀬𢀫𘑂𚡰𚐊`.replace(/u../g,'')))

Aug 11 2021 1:31 PM UTC

}// 140/140

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Digital seven segment clock #time #clock #lcd

u/KilledByAPixel

nice!
u/KilledByAPixel

can i use this in the next release of os13k?
u/rep_movsd

I'd be honored!
u/rep_movsd

Use my analog clock too :)
u/KilledByAPixel

nice thanks! i have an analog in the prev version but switching to digital probably for next js13k

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rodrigo.siqueira

remix of d/23456 by u/rodrigo.siqueira

function u(t) {

for(c.width=w=512,d=new ImageData(w,w),m=w*w,i=-1;m--;d.data[i+=4]=T(m/w/r-t*9|X/r)*w)r=((X=m%w-200)*X+m/w+i-3e5)/9e3
x.putImageData(d,0,0)

Aug 4 2021 12:56 PM UTC

}// 139/140

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Back and forth

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tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𭀿𭰽𨰮𭱩𩁴𪀦👩🐸𜰲𜀺𚁁👂🐸𛁕👖🐰𚐻𪐭𛐻𪰽𥀦𤠼𝐿𛠲𝐭𤠯𜠰𞠰𛁕𛐽𪰪𨐬𥠭👫𚡢𚑸𛡦𪑬𫁒𩑣𭀨𦀽𪐥𭰬𦐽𪐯𭰬𜐬𥁼𤠼𝐩𛁔👓𚁘𛰶𚐫𠰨𦐯𝠩𚱙𛰶🠸𛁒👍𨑴𪀮𪁹𬁯𭀨𨐽𦀭𠐬𨠽𦐭𠠩𞱁𚰽𥐬𠠫👖𛁁𚰽𭰬𠐥👷𛁖𚰽𛠱𜠵`.replace(/u../g,'')))

Jul 28 2021 12:08 AM UTC

}// 134/140

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Impossible Marble #Physics

u/tomxor

Inspired by d/23398. Uses raster/2d-voxel based intersection
u/Xen

love it!
u/magna

HOW?!
u/katkip

how
u/tomxor

It's particle physics, but the collisions are with implicit volumes. So rather than checking against a specific object, each pixel is intersected with the circle, if the pixel is filled and intersects, then it contributes velocity to the particle along the collision normal (the vector between the pixel and the point), the deeper the intersection based on the radius the greater the contribution... this is not correct at all and creates lots of phantom momentum, but is very simple and shares the code with drawining the screen.

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rodrigo.siqueira

remix of d/23404 by u/rodrigo.siqueira

function u(t) {

for(x.drawImage(c,C(t*4)*2-40,S(t*3)*2-15,i=2e3,1111);i--;x.fillStyle=`hsl(${i+155},90%,${i}%)`)x.fillRect(960+i*i*C(t*i),540+S(i)*i,2,2)

Jul 27 2021 6:31 PM UTC

}// 137/140

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Astral Voyager

u/danny@hille.dk

I want this as a screensaver!
u/rep_movsd

Flight through the speed force
u/jellyedwards

Very cool!
u/katkip

beautiful
u/smtsjhr

love it!

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