Top #illusion 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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AnnanFay

function u(t) {

with(x)for(i=n=t<32?1<<t/4:256;i--;beginPath(fill(arc(920+S(g=i/n*6.28)*(k=S(g+t)*460),540+C(g)*k,60,0,7))))fillStyle=`hsl(${t*99},100%,60%`

Mar 7 2018 4:13 PM UTC

}// 140/140

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This is my version of the wheel. Thanks to yonatan and Bálint for parts.

u/katkip

#illusion

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KilledByAPixel

function u(t) {

for(c.width|=L=300,k=2435;k--;x.arc(982,552,(z*2-1)*(4*L-k),q=(k%L/L*8*((k/L|0)%2*2-1)+t+z)*22/7,q))z=k<4*L;x.fill()

Oct 30 2019 6:08 PM UTC

}// 116/140

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Hypnotic Spiral

u/KilledByAPixel

#illusion

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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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katkip

function u(t) {

c.width|=0;x.translate(z=960,540);for(i=7;i--;x.fillRect(-z,0,2e3,4))x.beginPath(),x.fill(x.arc(S(t+i*1.68/4)*500,0,50,0,7)),x.rotate(.45)

Aug 24 2019 12:27 PM UTC

}// 138/140

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That #illusion that everybody knows but not very precise because of golfing. https://media1.tenor.com/images/4ba3468dfd7f…

u/aleamb

relaxing!

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KilledByAPixel

remix of d/14726 by u/KilledByAPixel

function u(t) {

c.width|=X=Y=Z=1
for(i=2e3;i--;x.lineTo(960+(X*C(t)-Y*S(t))*43,1160-Z*23))Z+=(X*Y-Z)/39,X+=(Y-X)/11,Y+=X*(27-Z)/96
x.lineWidth=9
x.stroke()

Jun 25 2019 3:04 PM UTC

}// 139/140

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3D #Lorenz Attractor 2

u/aleamb

#d3 #attractor
u/katkip

what is that rotation? clockwise or counter clockwise #illusion
u/katkip

not really 3D. the perspective is the save everywhere
u/katkip

it is 3D because the attractor is in space, but there is no perspective effect

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katkip

remix of d/11139 by u/anotherkitten

function u(t) {

x.fillStyle=`hsl(${t*99} 50%${50+50*S(t*99)}%`;x.arc(960,540,t+S(t**5)*t,3+C(t*99)*3,3+S(t*66)*3);x.fill();x.drawImage(c,-72,-40,2064,1160)

Nov 25 2018 10:33 AM UTC

}// 139/140

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Falling in the #illusion #waitforit stare in the middle for few seconds in fullscreen and see what happens

u/joeytwiddle

Yeah that's ... uh ... powerful!

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anotherkitten

function u(t) {

c.width|=0
s=C(t/7)*10.5+27.5
w=(1920+1920/s)/s
for(i=2e3;i--;)x.fillRect(i%s*w,50+(i/s|0)*100,-w,i%2?-50:50)

Mar 17 2022 3:13 PM UTC

}// 110/140

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u/rep_movsd

#illusion

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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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rep_movsd

function u(t) {

eval(unescape(escape`𦠽𭀯𝐫𞑼𜀊𭱩𭁨𚁸𚑻𩡩𫁬𤱴𮑬𩐽𙰣𝐸𩠧𛁦𪑬𫁒𩑣𭀨𜀬𜀬𥰽𜡥𜰬𥰩𛁴𚠽𞐬𩡯𫡴🐧𜱥𫐢𙰬𠐽𠠽🡻𩡩𫁬𤱴𮑬𩐽𤠨𢰽𠰨𭀭🐲𚐪𜐲𝰫𜐲𝰬𢰬𢰩𞱦𪑬𫁔𩑸𭀨𙱜𭑄𞀳𠱜𭑄𡠲𜠧𛁩𚠪𦠥𥰬𪐪𚠷𙑗𛑂𚑽𒡦𫱲𚁩🐹𞐻𪐭𛐻𚑁𚀭𜰩𛁁𚀳𚐬𠐨𜀩𯐊`.replace(/u../g,'')))

Jul 11 2021 10:33 PM UTC

}// 137/140

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Raindrops #Illusion

u/rep_movsd

Based on https://twitter.com/jagarikin/status/1413091…

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