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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Current theme challenge: #Opposites

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KilledByAPixel

function u(t) {

c.width+=0;for(i=999;i--;)N=150*S(t+i/2),Y=3*N,X=800*S(i/3),x.beginPath(),x.fillStyle=R(99+N,0,99*S(i)),x.arc(960+X,540+Y,40,0,7),x.fill()

Apr 11 2019 11:12 PM UTC

}// 138/140

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Weird shapes.

u/KilledByAPixel

Here it is in the ADE... http://www.3d2k.com/js/dweetgen/?a0=1&a1…
u/KilledByAPixel

Cant figure out if this is rotating around the vertical or horizontal axis.
u/joeytwiddle

If you can't see both rotations, Slacklustre's GIF may help: https://www.reddit.com/r/illusionporn/commen…
u/KilledByAPixel

#illusion #opticalillusion

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metamero

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㵫㴰ⱺ㴷㈬礽㈰㭫㰸㤵㭫⬫⥩㴨款㸵⤦㌱ⱪ㴨款㸱⤦ㄵⱰ㵺⩩ⱱ㵺⩪ⱸ⹲散琨瀫⡫☲㼴㨴㠩ⱱ⬨欦ㄿ㐸㨴⤬礬礩Ⱬ☱㼰㩩⭪☱㼰㩸⹲散琨瀬焬稬稩㭸⹦楬氨❥癥湯摤✩`.replace(/u(..)/g,"$1%")))

Dec 2 2018 4:33 PM UTC

}// 127/140

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finding new patterns with strong effects of the #enhancedcheckeredillusion [#illusion proposed by a. kitakoa in 2001, ref. bellow]

u/metamero

Kitaoka, A. (2007). Tilt illusions after Oyama (1960): A review. Japanese Psychological Research, 49, 7-19.
u/metamero

http://www.psy.ritsumei.ac.jp/~akitaoka/tilt…
u/metamero

for(c.width|=k=0,z=72,y=20;k<895;k++)i=(k>>5)&31,j=(k>>1)&15,p=z*i,q=z*j,x.rect(p+(k&2?4:48),q+(k&1?48:4),y,y),k&1?0:i+j&1?0:x.rect(p,q,z,z);x.fill('evenodd')

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metamero

remix of d/11217 by u/metamero

function u(t) {

eval(unescape(escape`景爨稽㜲Ᵽ⹷楤瑨簽欽〻欼㐴㤻⬫欩椽款㸴ⱪ㵫☱㔬瀽稪椬焽稪樭稬⠨椫権┲㽸⹲散琨瀬焬稬稩㨰⤬砮牥捴⡰⬴ⱱ⬴⭺⩃⡴⤪⨨欥㜩ⰲ〬㈰⤬砮牥捴⡰⬴㠬焫㐸⭺⩓⡴⤪⨨欥㔩ⰲ〬㈰⤻砮晩汬⠧敶敮潤搧⤻`.replace(/u(..)/g,"$1%")))

Nov 30 2018 9:17 PM UTC

}// 138/140

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#Trippy #Illusion by [metâmero]

u/metamero

for(z=72,c.width|=k=0;k<449;++k)i=k>>4,j=k&15,p=z*i,q=z*j-z,((i+j)%2?x.rect(p,q,z,z):0),x.rect(p+4,q+4+z*C(t)**(k%7),20,20),x.rect(p+48,q+48+z*S(t)**(k%5),20,20);x.fill('evenodd');
u/iverjo

#opticalillusion

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ciaccodavide

function u(t) {

eval(unescape(escape`𭁼𯁸𛡦𪑬𫁒𩑣𭀨𜀬𜀬𭰽𜡥𜰬𭰬𬠽𣑡𭁨𛡲𨑮𩁯𫐩𒡦𫱲𚁮🐳𩐳𞱘👲𚀩𚡷𛁙👲𚀩𚡷𛁤👍𨑴𪀮𪁹𬁯𭀨𦀭𞐶𜀬𦐭𝐴𜀩𛰹𛁮𛐭𞰩𮀮𩡩𫁬𤡥𨱴𚁘𛁙𛀴𛁴🀱𛁸𛡦𪑬𫁓𭁹𫁥👒𚀨𩀼𜰰𚐪𭰬𜀬𚁤🠳𝠩𚡷𚐩`.replace(/u../g,'')))

Dec 9 2021 10:46 AM UTC

}// 121/140

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#illusion #opticalillusion

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KilledByAPixel

function u(t) {

with(x)for(save(restore(t|=0)),fillStyle=R(t%2*T,i=T=2e3,!t*T),t&&beginPath(clip(arc(640+25**t,540,440,0,9)));i--;)fillRect(i*18+t*9,0,9,T)

Jun 16 2021 4:39 AM UTC

}// 139/140

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Real Yellow vs Fake Yellow 🟡 #illusion

u/KilledByAPixel

inspired by https://twitter.com/AkiyoshiKitaoka/status/1…

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metamero

remix of d/14453 by u/metamero

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱮𭀽𘠳𜠰𬁸𘁁𬡩𨑬𘁂𫁡𨱫𘠬𩡩𫁬𤱴𮑬𩐽𚁩👦𬡡𫑥𛐱𚐿𪐾𜰿𘠣𜁆𡠢𞠢𘰰𜀰𘠺𘠣𜀰𡠢𛁩𙠦𪐼𝀿𪑞𜰿𩡩𫁬𥁥𮁴𚁩𧠱🰢𩱲𩑥𫠢𞠢𪑬𫁵𬱯𬡹𘠬𞐹𛁩𚠴𜠰𚐺𬡯𭁡𭁥𚀮𝰸𝐩𞡦𪑬𫁒𩑣𭀨𪐪𜠳𛐹𞐬𛐲𩐳𛁩🰱𜰺𜡥𜰬𝁥𜰩𞱯𫡣𫁩𨱫👲𩑳𩑴`.replace(/u../g,'')))

Jun 6 2019 1:28 PM UTC

}// 140/140

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animated version of d/14453 click to reset

u/metamero

#illusion #opticalillusion behind the scenes ;)
u/DataMeta

#hiddengem

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timothytomato

function u(t) {

c.width=1080
for(i=0;i<200;i++)
x.fillRect(10*i,300-(S(t+i)*100),20,10)

Nov 2 2023 11:16 PM UTC

}// 71/140

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Rotating Cylinder Optical Illusion

u/timothytomato

#illusion

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ciaccodavide

remix of d/20864 by u/ciaccodavide

function u(t) {

for(i=192;i--;)x.fillStyle=`hsl(0,0%,${i*.6}%)`,x.fillRect(i*10,0,192,2e3)
x.fillStyle=`grey`
x.arc(960,540,400,0,7)
x.fill()

Nov 30 2020 11:56 AM UTC

}// 125/140

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Spheric Illusion

u/ciaccodavide

#illusion

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ciaccodavide

remix of d/20863 by u/ciaccodavide

function u(t) {

for(i=192;i--;)x.fillStyle=`hsl(0,0%,${i*.6}%)`,x.fillRect(i*10,0,192,2e3)
x.fillStyle=`grey`
x.fillRect(0,440,1920,200)

Nov 30 2020 11:55 AM UTC

}// 120/140

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There is only one gradient

u/ciaccodavide

#illusion

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ciaccodavide

function u(t) {

for(i=192;i--;)x.fillStyle=`hsl(0,0%,${i*.6}%)`,x.fillRect(i*10,0,192,2e3)
x.fillStyle=`grey`
x.fillRect(860+S(t)*860,440,200,200)

Nov 30 2020 11:51 AM UTC

}// 130/140

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Changing color opotical illusion

u/ciaccodavide

#illusion

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