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) {

with(x)for(c.width|=q=i=640,font='9em"',fillText('Dual Axis Rotation',400,170);i--;)beginPath(fill(arc(960+q*S(i*2),q+350*C(t+i*3),30,0,7)))

Dec 10 2019 4:50 AM UTC

}// 140/140

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I am in the top 10 Best Illusions of the Year! Help me win by voting at: http://illusionoftheyear.com/vote

u/katkip

i voted
u/katkip

it's a good find
u/metamero

wow! impressive. voted
u/metamero

#illusion #opticalillusion
u/KilledByAPixel

i won ;)

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DataMeta

remix of d/15839 by u/DataMeta

function u(t) {

s=C(t);c.style.background=R(g=s*255,g,g);if(t<3)for(i=1920;i--;)
x.fillStyle=R(l=i/7.5,l,l),x.fillRect(t*s>=0?1918-i:i,540-g,4,4)

Sep 29 2019 4:55 AM UTC

}// 129/140

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#gradient #illusion

u/katkip

nice
u/iverjo

#opticalillusion

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KilledByAPixel

function u(t) {

eval(unescape(escape`昽晲慭攻睩瑨⡸⥦潲⡢敧楮偡瑨⡦楬汓瑹汥㴢⌹㤹∩ⱦ楬氨慲挨昪㐸〭㜱㤬㘴〫㐳〪匨昪昩ⰲ㄰ⰰⰷ⤩Ⱪ㴹㤻椭ⴻ琦♩┲㴽春㉼籦楬汒散琨昪㐸〭㤶〬椪ㄹⱴ㼴㠰㨴攳ⰹ⤩晩汬却祬攽椦ㄿ∣〰䘢㨢⍆〰∻`.replace(/u(..)/g,"$1%")))

Jun 15 2019 3:53 PM UTC

}// 137/140

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All these balls are grey! #OpticalIllusion

u/KilledByAPixel

Apparently this is called a 2 color confetti illusion with circles
u/DataMeta

#hiddengem
u/KilledByAPixel

#illusion

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metamero

remix of d/14452 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𡡆𡠢𞠢𘰵𝐵𘠺𘠣𜀰𡠢𛁩𙠦𪐼𝀿𪑞𜰿𩡩𫁬𥁥𮁴𚁩𧠱🰢𮑥𫁬𫱷𘠺𘡩𫁬𭑳𫱲𮐢𛀹𞐬𪐪𝀲𜀩𞡲𫱴𨑴𩐨𛠸𚐺𩡩𫁬𤡥𨱴𚁩𚠱𞐭𝠹𛀭𜡥𜰬𪐿𜐳𞠳𩐳𛀴𩐳𚐻𫱮𨱬𪑣𪰽𬡥𬱥𭀻`.replace(/u../g,'')))

Jun 5 2019 10:19 PM UTC

}// 140/140

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animated version of d/14452 click to reset

u/metamero

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

at first i was ok, but then i started screaming "I STILL SEE YOU!", and thats how it happened....
u/joeytwiddle

Very convincing illusion!

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katkip

function u(t) {

t||(a=b=0);for(i=99;i--;)a+=C(b+t*t)/99,b+=C(a+t*t)/99,x.fillRect(i*(80+t*C(t))+a*5-1e3,b*5,5,5)

Feb 15 2019 12:29 PM UTC

}// 96/140

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Pulse waves - attractor draws sqare wave, #waves

u/katkip

#illusion btw

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katkip

remix of d/11022 by u/katkip

function u(t) {

x.arc(960,540,150*t,0,7);x.stroke()

Nov 17 2018 5:19 PM UTC

}// 35/140

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Longer than short art #illusion if you watch the center

u/jylikangas

You can save one byte like this: x.arc(960,540,150*t,!x.stroke(),7)
u/katkip

true

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katkip

function u(t) {

c.width*=1;
for(i=0;i<400;i++)x.fillRect(i*(5+t/99),0,S(t*i/99)*3,2000)
for(i=0;i<400;i++)x.fillRect(0,i*(5+t/100),2000,S(t*i/99)*3)

Sep 21 2018 11:28 AM UTC

}// 132/140

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Black and white illusion. Don't see the #illusion ? Fullscreen

u/metamero

#ScintillatingGridIllusion

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katkip

remix of d/9553 by u/katkip

function u(t) {

c.width=100;p=0;for(i=0;i<100;i++)for(j=0;j<100;j++)x.fillStyle=`hsl(${C(i/0.3+t)<S(j/0.3+t)?100:200},99%,50%)`,x.fillRect(i,j,1,1),p++

Aug 31 2018 10:04 AM UTC

}// 135/140

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#illusion you don't know if it is changing or not

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katkip

function u(t) {

f=(a,b)=>C(b)*S(a)>0?f(-a/3,b):S(a)+C(b)<0
for(i=4999;i--;){a=(r=Math.random)()*1920,b=r()*1080;if(f(a/49,b/49))x.fillRect(a,b,3,3)}

Dec 30 2019 7:40 PM UTC

}// 132/140

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Go this way! #recursion

u/katkip

#illusion

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katkip

function u(t) {

q=4;for(i=212;i--;)x.beginPath(),x.fillStyle=['#DD1',R(),"#06D","#fff"][i%4],x.arc(260+C(i*q)*i+(t|0)*600,540+S(i*q)*i*2,i,0,7),x.fill();

Jun 16 2019 7:28 AM UTC

}// 137/140

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Move your eyes randomly to see them move #opticalillusion #illusion

u/joeytwiddle

I was not here

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