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

remix of d/14618 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𩠽𩡲𨑭𩐻𭱩𭁨𚁸𚑦𫱲𚁢𩑧𪑮𤁡𭁨𚁦𪑬𫁓𭁹𫁥🐢𘱃𠱃𘠩𛁦𪑬𫀨𨑲𨰨𩠪𜠷𜀭𝠵𞐬𝐴𜀫𜰵𜀪𤰨𩠪𜐮𝠩𛀱𜰰𛀰𛀷𚐩𛁩🐹𞐻𪐭𛐻𭀦𙡩𙐳𘐽𩠥𜱼𯁦𪑬𫁒𩑣𭀨𩠪𜠷𜀭𞀰𜀬𪐪𜐶𛁴🰴𞀰𞠴𩐳𛀱𝠩𚑦𪑬𫁓𭁹𫁥👩𙐳🱩𙐳🐽𜐿𘠣𜀰𡠢𞠢𘰰𡠰𘠺𘠣𡠰𜀢`.replace(/u../g,'')))

Jun 15 2019 7:07 PM UTC

}// 140/140

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3 Color Munker Illusion ~ All circles are same shade of grey #OpticalIllusion

u/joeytwiddle

fillStyle='#'+'00F00'.substr(i%3,3) although substr is deprecated
u/joeytwiddle

I think this one works better than the one on Twitter!
u/katkip

#illusion

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metamero

remix of d/14453 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𜐿𘡭𨑧𩑮𭁡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𞠢𘰹𞐹𘠺𘠣𜁆𡠢`.replace(/u../g,'')))

Jun 5 2019 11:30 PM UTC

}// 139/140

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#opticalillusion variation I found myself

u/metamero

#illusion

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katkip

remix of d/12171 by u/katkip

function u(t) {

eval(unescape(escape`挮睩摴株㴱㭸⹦楬汒散琨〬㐰〬㉥㌬㈰〩㭦潲⡩㴱㭩⬫㰹㬩砮晩汬剥捴⠲〰⭩⨱〰⭓⡴⤪㌰〬〬㔰ⰲ攳⤻景爨椽ㄻ椫⬼㤻⥸⹣汥慲剥捴⠲〰⭩⨱〰⭓⡴⬮ㄷ⤪㌰〬㐰〬㔰ⰲ〰⤻`.replace(/u(..)/g,"$1%")))

Feb 5 2019 6:05 PM UTC

}// 125/140

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#default #illusion

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metamero

remix of d/11514 by u/metamero

function u(t) {

eval(unescape(escape`䴽琿䴮浡瀨⡭Ⱬ⤽㹸⹦楬汒散琨津渪測樽洭津測ㄵⰱ㔬䤽愽㸨洫愫ㄴ㐩┱㐴⥼欿ⴭ欿䵛歝㩈㵶┲㽉⡶⩮⤺䤨瘫ㄩ╮⭪㩇㵭Ᵽ⹷楤瑨㴲㔶⤺孆偓㵮㴱㘬瘽〬潮步祤潷渽攽㹶㵥⹷桩捨ⴳ㥝㭇幈籼䴮畮獨楦琨䤨䜫㤩⤻`.replace(/u(..)/g,"$1%")))

Dec 23 2018 9:11 PM UTC

}// 140/140

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#snake #game : play with arrows : best on fullscreen : try to fill ;)

u/metamero

scintillating grid #illusion happens when screen is filled

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katkip

function u(t) {

if(t<3){for(i=10;i--;)x.fillStyle=`hsl(${t*10*i},99%,50%)`,x.fillRect(0,0,30*i,i*30),x.translate(i*.1,i*.061)}

Nov 15 2018 1:26 PM UTC

}// 110/140

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3D "GLASS" tunnel #d3 #tunnel #illusion

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f8f82804

function u(t) {

c.width^=0;with(x){lineWidth=6;translate(960,540);rotate(42*t);fill(arc(0,0,440,0,3));for(i=30;i--;stroke())beginPath(),arc(0,0,15*i,i,i+2)}

Aug 23 2018 11:01 PM UTC

}// 140/140

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Benham's top #illusion -- https://en.wikipedia.org/wiki/Benham%27s_top

u/f8f82804

#opticalillusion

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tactical_retard

remix of d/23883 by u/donbright

function u(t) {

質=(n)=>{for(j=2;j<n;j++){if (n%j==0)return n}return 0}
格=7
for(X=299;X--;)
for(Y=299;Y--;)
if (質(X-Y)) x.fillRect(格*X,格*Y,格,格)

Sep 20 2021 2:00 PM UTC

}// 128/140

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they look wavy zoomed out but they are straight #illusion

u/rep_movsd

Nice - after staring a bit they look like ropes
u/ciaccodavide

when I scroll I can see some vertical lines and if I squint my eye I almost see a grid

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ciaccodavide

remix of d/21446 by u/ciaccodavide

function u(t) {

f=(i,j=i%1,k=~~i,m=j*j*(3-2*j))=>S(k*k)*m---m*S(--k*k)
c.width|=0
for(Y=126;Y-=9;)for(i=2e3;i--;)x.fillRect(i,Y*9-81,f(i/32+S(Y+t/2)*Y),81)

Jan 25 2021 6:56 PM UTC

}// 139/140

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Noise bands with bending lines #illusion

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katkip

function u(t) {

c.width=700;for(i=999;i--;)s=99+S(i*.00157)*i/20*S(i%2+2.6)+S(i**9/9e24/6)*.01*i,x.fillText((i*t)&1,350+C(i*(q=.0062)+t)*s,200+S(i*q+t)*s)

Mar 12 2020 6:27 PM UTC

}// 138/140

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Binary Jörmungandr #ouroboros - XaTuring's physical form

u/katkip

#illusion : doesn't get smaller and smaller but that's the effect if you stare at it
u/joeytwiddle

Mmm delicious: me!

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DataMeta

function u(t) {

c.style.background=R(g=S(t*1.5)*255,g,g);if(t<3)for(i=1920;i--;)
x.fillStyle=R(l=i/7.5,l,l),x.fillRect(i,540-C(t)*i/5,13,13)

Sep 28 2019 4:17 PM UTC

}// 124/140

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Had this laying around. Demonstrates the #illusion in d/15823. The triangle's #gradient remains unchanged.

u/DataMeta

The center of the base of the triangle doesn't exhibit the illusion strongly since there is a constant reference color near it and it is far from the changing background.
u/iverjo

#opticalillusion

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