Dweets by u/tomxor

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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tomxor

function u(t) {

for(w=c.width&=i=8320;i--;x.fillRect(S=i&127,C=i>>7,1,q=2*p|0),R=(p-q)/16,u[T]+=3*R,u[T=i-w]+=5*R,u[T-1]=R)p=(u[i]+=7*R)+(S*S+C*C)/8e3-1||0

Oct 15 2021 11:21 PM UTC

}// 139/140

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Floyd–Steinberg #dithering

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tomxor

remix of d/24055 by u/Joachim

function u(t) {

with(x)for(i=0;i<9;stroke())lineTo(a=8*i,b=50+5*C(t-i)),lineTo(a-5*S(t-i),b+9),lineTo(a,b),fillRect(i&&(a-t)%21*6,64,i||(c.width=128),1-i++)

Oct 10 2021 12:47 PM UTC

}// 140/140

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Mini Stick Millipede

u/danny@hille.dk

Great golf
u/Joachim

clever!

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tomxor

remix of d/23968 by u/KilledByAPixel

function u(t) {

for(X=t?X+r*50:0,i=h=11+6*C(t*4+X%1)<<5;--i;x.fillRect(...t?[X-r*i/4,600+(r*8&3?i-h:h-i),i/4,2]:[i*8,r*999,h,r]))r=Math.random()

Oct 2 2021 12:56 PM UTC

}// 128/140

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Smolr Tree Lake

Show more comments…
u/tomxor

A nice round 2**7 chars. A bit of bitwise, ternary trimming and coefficient concessions
u/KilledByAPixel

nice! I'm surprised you didn't get rid of the Math.random()!
u/yonatan

nice golf, r=(t+i)**3.9%1 works too
u/tomxor

Yeah I was surprised to, I think this one is a bit more sensitive to bad distributions. Yonatan's is pretty good though.
u/pavel

X=t?X+r*50:0 -> X=t&&X+r*50
u/pavel

r=++t**3.9%1 saves 3 chars
u/pavel

Ah, no, it kills the sky/water.
u/KilledByAPixel

i feel it is possible to somehow golf the random part by at least a byte but I still haven't found a way without major issues
u/pavel

for(X=t&&X+r*25,i=h=11+6*C(t*4+X%1)<<5;--i;x.fillRect(...t?[X-r*i/8,600+(r*8&3?i-h:h-i),i/4,2]:[i*8,r*600,h,r]))r=1+S(i^X)
u/pavel

122
u/KilledByAPixel

I knew you could do it pavel!
u/aleamb

beautiful!!

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tomxor

remix of d/23756 by u/tomxor

function u(t) {

for(Y=t*480%720|0,X=1280;X--;!Z|!Y|Y>640|(Z/480+.75&Y/480+.83&(X|Y)/16%15)&&x.fillRect(320+X,180+Y-Z/6*S(Z/203),3,4))Z=X>640?1279-X:X

Sep 5 2021 8:28 PM UTC

}// 133/140

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Smolr #book of #sierpinski

u/tomxor

Someone's been drawing in the margins...
u/erin

magic

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tomxor

remix of d/23746 by u/rep_movsd

function u(t) {

for(Y=t*480%720|0,X=1280;X--;!Z|!Y|Y>640|(Z/512+.86&Y/512+.86&Z>>5&Y>>5&C(Z*Y)>0)&&x.fillRect(320+X,180+Y-Z/6*S(Z/203),3,4))Z=X>640?1279-X:X

Sep 5 2021 3:31 PM UTC

}// 140/140

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Smolr #book of #logograms

u/rep_movsd

As the moon, so the sun, fortune is as a ripening plum - I Ching

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tomxor

remix of d/23746 by u/rep_movsd

function u(t) {

for(Y=t*480%720|0,X=1280;X--;!Z|!Y|Y>640|(Z/480+.75&Y/480+.83&C(Z*Y)>.8&&Y&48)&&x.fillRect(320+X,180+Y-Z/6*S(Z/203),3,4))Z=X>640?1279-X:X

Sep 5 2021 3:30 PM UTC

}// 137/140

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Smolr #book of #music

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tomxor

remix of d/23746 by u/rep_movsd

function u(t) {

for(Y=t*480%720|0,X=1280;X--;!Z|!Y|Y>640|(Z/480+.75&Y/480+.83&C(X*Z*Y)>.8&&Y&15)&&x.fillRect(320+X,180+Y-Z/6*S(Z/203),3,4))Z=X>640?1279-X:X

Sep 5 2021 3:30 PM UTC

}// 139/140

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Smolr #book of dweet

u/tomxor

Smolr #book of #sierpinski
u/tomxor

Yay, remix fail

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tomxor

remix of d/23549 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𨐽𣑡𭁨𛡡𨡳𛁣𛡳𭁹𫁥𛡢𨑣𪱧𬡯𭑮𩀽𙰣𞐹𞐧𛁣𛡷𪑤𭁨𙠽𪐽𝀳𝐲𞱘🐱𛐨𭀫𪐯𜰲𚐥𜠬𦐽𛐭𪐯𜡥𜰻𮀮𩡩𫁬𤱴𮑬𩐽𚁩𧡩🠾𝠩𙠸🰧𬡥𩀧𞠧𘱦𩡦𙰬𮀮𩡩𫁬𤡥𨱴𚀶𝀪𚁘𛱲𚱡𚀲𛑴𙐴𚐫𜐩𛀹𝠭𝠴𚠨𦐯𬠫𨐨𤰨𭀩𚐩𛁫🐵𛱲𛐲𛁫𚐩𬠽𛐭𦐪𦐫𦀪𦀫𜐻`.replace(/u../g,'')))

Aug 13 2021 9:03 PM UTC

}// 140/140

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Smooth Colour #Amiga #Ball

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u/tomxor

If someone can squeeze in a hard shadow and a purple grid we will be done.
u/danny@hille.dk

Beautiful
u/danny@hille.dk

I distinctly remember the grid to be blue... but all the youtube videos shows it to be purple... I think it's a conspiracy :-)
u/ullo

i like
u/KilledByAPixel

dweetabase updated! https://dweetabase.3d2k.com/
u/tomxor

I can't find it now but I seem to remember reading about how emulated colours of amigas look different from real amiga video output. The emulators are probably just spitting out the RGB values and letting the host OS do the gamma etc. I suspect real amiga video output must have been a bit "coloured" which causes this difference.

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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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tomxor

remix of d/23413 by u/tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𭀿𭰽𨰮𭱩𩁴𪀦👩🐸𜰲𜀺𠐽𠠽𥐽𥠽𜀻𪐭𛐻𪰽𤰦𤠼𝐿𛠱𜠵𛑒𛰴𜀺𜀬𥐭👫𚡡𛁖𛐽𪰪𨠩𮀮𩡩𫁬𤡥𨱴𚁘👩𙑷𛁙👩𛱷𛀱𛁓𯁒🀵𚐬𤰽𥀨𥀨𠰨𦀯𜐰𚐪𠰨𦐯𞐫𭀩𚐩🁙𛰹𛐳𚰳𚡃𚁴𚐬𤠽𣑡𭁨𛡨𮑰𫱴𚁡👘𛑁𛁢👙𛑂𚐻𠐫👕𚱷𛁂𚰽𥠪🐮𞐬𠐥👷𛁖𚰽𛠱`.replace(/u../g,'')))

Jul 28 2021 12:57 AM UTC

}// 140/140

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"This Thing" Capturing a Marble #Physics

u/magna

!!!
u/katkip

OMG

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