Top #opticalillusion dweets

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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ciaccodavide

remix of d/24232 by u/ciaccodavide

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼👩🐹𞱩𛐭𞰩𒡦𫱲𚁪👨🐳𜠱𛁧🐲𜀰𛱨𞱨𛐭𞰩𮀮𩡩𫁬𤱴𮑬𩐽𨁲𩱢𚀰𛀰𛀰𛁠𚰨𪀪𪀪𜐮𜰴𝰯𪠯𪠩𛀊𮀮𩡩𫁬𤡥𨱴𚀵𜰵𚱓𚁴𚐪𜰰𜀫𪐪𜐰𜀬𝀴𜀫𩰪𪀬𝐰𛁧𚐬𒡸𛡦𪑬𫁒𩑣𭀨𝐸𝐫𤰨𭀩𚠳𜀰𚱩𚠱𜀰𛀶𝀰𚱧𚠨𜐭𪀩𛀵𜀬𩰩`.replace(/u../g,'')))

Oct 25 2021 2:03 PM UTC

}// 134/140

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#default illusion

u/Xen

love it!
u/DataMeta

one of my favorite types of #opticalillusion

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pavel

function u(t) {

for(i=36;--i;x.fillRect(m?Math.abs(9*t%53-26)<<6:i*60-210,m*i*327,60<<2*m,m?99:2e3))m=i<3,x.fillStyle=m?i%2?'#ff0':'#00a':i%2&t/4?R():'#eee'

Feb 9 2020 1:50 AM UTC

}// 140/140

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Stepping feet #illusion

u/katkip

#opticalillusion
u/veubeke

@pavel Sorry, I didn’t see your dweet. I deleted mine and will do a better job searching next time.
u/pavel

I was just cross-posting mine as they were on the same topic without a clear keyword. You should have kept yours, it was clearly different.

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joeytwiddle

remix of d/15127 by u/veubeke

function u(t) {

c.width|=0;x.font='9em"';['🌾','🐄','🥩','🍔','💩'].map((C,j)=>{for(i=12;i--;)X=((i+t)%12)-6,x.fillText(C,900-(1-2*(j%2))*X*192,160+220*j)})

Jul 24 2019 1:37 PM UTC

}// 135/140

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u/donbright

vegetarian version would be a lot less rows
u/veubeke

:D
u/iverjo

It's the ciiiircle of liiiiiiiife, and it moves us aaaaall
u/joeytwiddle

lol iverjo
u/joeytwiddle

Do the two rows moving right look faster than the three rows moving left? #opticalillusion

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KilledByAPixel

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁺👴🀱𛁩🐲𞐹𞱩𛐭𞱳𪁡𩁯𭱂𫁵𬠽𮠪𝀰𚑦𫱲𚁪🐹𞱪𛐭𞱦𪑬𫁒𩑣𭀨𦀽𮠿𪐪𞐹𞡩𚠹𛐹𞐬𦐽𮠿𭀪𝡥𜰺𭀪𝐴𜀭𝠰𜀬𭰽𮠿𜠹𞠹𛀨𮡼𯁍𨑴𪀮𪁹𬁯𭀨𦀭𞐶𜀬𦐭𝐴𜀩🠴𞀰𚐪𭰩𚑳𪁡𩁯𭱃𫱬𫱲👦𪑬𫁓𭁹𫁥👓𚁴𚡩𚡴𚡩𚐼𮠿𘠣𜀰𜀢𞠢𘱆𡡆𘠻`.replace(/u../g,'')))

Oct 24 2019 5:52 PM UTC

}// 140/140

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Dizzy Dots

u/magna

Dude.
u/katkip

#illusion #opticalillusion
u/Xen

Yess
u/KilledByAPixel

#Inktober day 24: Dizzy

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rodrigo.siqueira

function u(t) {

x.fillStyle='gray';x.fillRect(250,440,1420,200)
x.fillStyle=R(t*70,t*70,t*70)
x.fillRect(t*510,0,9,1080)

Sep 27 2019 2:25 PM UTC

}// 104/140

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Illusory gradient grayscale ("Simultaneous Contrast Illusion"). The bar in the middle is a CONSTANT SHADE of gray. Viewing two colors at the same time influences both of their appearances. #gradient #illusion

u/iverjo

#opticalillusion

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anotherkitten

function u(t) {

c.width|=0
for(k=270,j=0;k--;j-=S(k/9)>0?1:-1)for(i=40;i--;)x.fillRect(i*99-400-k*C(t*.887)+j*(S(t)*6),k*4,49,4)

Oct 25 2021 2:25 PM UTC

}// 112/140

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shifting floors in the black lodge

u/Xen

nice!
u/DataMeta

#opticalillusion

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rodrigo.siqueira

remix of d/21257 by u/Xen

function u(t) {

for(i=2e3,f=g=>i*g(i/t+i**7);i--;x.fillRect(950+f(C),540+f(S),9/t,1+9/t))x.fillStyle=`hsl(${i/30},80%,${S(i/1e5+t)*99}%,.2`

Jan 13 2021 11:39 PM UTC

}// 123/140

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Dots of light

u/Qwitter

awesome, Im not sure why, but i think this frightens me after staring at it for a while.
u/Xen

nice!
u/iverjo

Put it in fullscreen and look at the center for at least 10 seconds - it might look like the big parts move in a wavy motion. #opticalillusion
u/joeytwiddle

Instructions unclear. Summoned Cthulu.
u/Qwitter

#barkfleshwound

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metamero

function u(t) {

eval(unescape(escape`景爨稽㜲Ᵽ⹷楤瑨簽欽〻欼㈵㔻欫⬩漽⡲ⱳⱡ⤽㹸⹲散琨爬猬愬愩Ⱪ㵫☱㔬樽款㸴ⱪ☽ㄵⱰ㴴㈰⭺⩩ⱱ㵺⩪Ⱪ㰱㔿⠨椫権┲㼰㩯⡰ⱱⱺ⤬漨瀫⡫┲㼴㠺㐩ⱱ⬨欦㈿㐸㨴⤬㈰⤩㨰㭸⹦楬氨❥癥湯摤✩`.replace(/u(..)/g,"$1%")))

Nov 30 2018 5:59 PM UTC

}// 134/140

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#OpticalIllusion

u/katkip

#illusion cool
u/metamero

for(z=72,c.width|=k=0;k<255;k++)o=(r,s,a)=>x.rect(r,s,a,a),i=k&15,j=k>>4,j&=15,p=420+z*i,q=z*j,i<15?((i+j)%2?0:o(p,q,z),o(p+(k%2?48:4),q+(k&2?48:4),20)):0;x.fill('evenodd')
u/ceaga

kanji chester!

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Bugsy

function u(t) {

for(c.width|=r=999;--r;x.lineTo(960+C(r+t)*a,540+S(r+t)*a))a=r/2
x.stroke()

Jun 16 2018 4:32 PM UTC

}// 75/140

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The graph r=theta spinning around the origin. 65 characters to play with, so there's lots of remixing potential. Try messing around with the trig functions, it leads to some fun results

u/iverjo

Go fullscreen, stare at the center for 30 seconds, then look away from your screen (e.g. look at your keyboard). #opticalillusion
u/iverjo

#short

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metamero

remix of d/14452 by u/metamero

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁩🐭𜐬𩡯𫡴🐢𜰲𜁰𮀠𠑲𪑡𫀠𠡬𨑣𪰢𞱩𚰫🀹𞐻𭀿𜀺𪐦𙡩🀴🱩𧠳🱦𪑬𫁔𩑸𭀨𪑞𜐿𘡧𬡥𩑮𘠺𘡩𫁬𭑳𫱲𮐢𛀹𞐬𪐪𝀲𜀩𞡲𫱴𨑴𩐨𛠷𞀵𚐺𩡩𫁬𤡥𨱴𚁩𚠲𜰭𞐹𛀭𜡥𜰬𪐿𜐳𞠲𩐳𛀴𩐳𚐩𩡩𫁬𤱴𮑬𩐽𪐿𪐾𜰿𘠣𜁆𡠢𞠢𘰰𜀰𘠺𘠣𜀰𡠢`.replace(/u../g,'')))

Jun 5 2019 9:08 PM UTC

}// 138/140

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"緑錯視" by Akiyoshi Kitaoka

u/metamero

#illusion #opticalillusion see d/14452
u/metamero

http://www.psy.ritsumei.ac.jp/~akitaoka/colo…
u/Xen

if you tell me theres no green used here... thats where it all ends! i will walk the streets naked setting fire to things lol
u/metamero

u/Xen goto fullscreen and see the text closely. this is composed only with blue, black and cyan ;)

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