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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jdidion

function u(t) {

c.width=900
for(i=0;i<90;i++)
x.font="75px'",x.fillStyle=`hsl(${t*i*29},30%,10%`,
x.fillText("/\\".repeat(90),-100+C(t*2+i/20)*45,i*15)

Jan 26 2021 7:26 PM UTC

}// 135/140

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u/Xen

does look nice
u/DataMeta

cool #opticalillusion

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katkip

function u(t) {

for(c.width|=j=5,z=600;j--;)for(i=2*z;i--;)x.fillRect(960+C(i*52e-4)*600+S(i*j+t)*99,540+S(i*52e-4)*300+C(i*j+t)*99,s=C(i*52e-4-1.5)*2+5,s)

Jan 10 2020 1:02 PM UTC

}// 139/140

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#ellipse inside a #torus

u/DataMeta

#opticalillusion

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pythech

remix of d/8630 by u/pythech

function u(t) {

c.width|=0
with(x)for(i=3;i--;stroke())beginPath(lineWidth=r=100*C(t+3.14)+200),arc(650+250*i,700-i%2*434,r/2,z=i*2.095,5.235+z)

Jun 17 2018 9:24 PM UTC

}// 128/140

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Imaginary Triangle

u/lionleaf

#illusion
u/iverjo

#opticalillusion
u/Purpzie

You can save 1 character by putting arc(650+250*i,700-i%2*434,r/2,z=i*2.095,5.235+z) in the for loop before stroke()
u/Purpzie

oh wait no you can't it's the same, never mind

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metamero

function u(t) {

eval(unescape(escape`琿挮睩摴桼㵪㴱㔺猽〻潮浯畳敭潶攽攽㹳㵥⹸⽩湮敲坩摴栻稽㜲㭲㴨愬戬挬搬攩㴾筸⹦楬汓瑹汥㵒⡥㼱㈸㨰⤻砮晩汬剥捴⡡⩺⨴Ɫ⩺Ᵽ⩺Ɽ⥽㭦潲⠻樻⥦潲⡲⡳ⱪⴭⰲ㈬㐬椽㘩㬭⵩㬩爨椫⡳⴮㔩⨨樥㈩ⱪⰲⱺ⤻`.replace(/u(..)/g,"$1%")))

Dec 9 2018 9:00 PM UTC

}// 140/140

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#Interactive #CafeWallIllusion

u/metamero

t?c.width|=j=15:s=0;onmousemove=e=>s=e.x/innerWidth;z=72;r=(a,b,c,d,e)=>{x.fillStyle=R(e?128:0);x.fillRect(a*z*4,b*z,c*z,d)};for(;j;)for(r(s,j--,22,4,i=6);--i;)r(i+(s-.5)*(j%2),j,2,z)
u/metamero

#cafewall #illusion #opticalillusion #mouse
u/katkip

nice
u/DataMeta

#hiddengem

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iverjo

function u(t) {

c.width=960;for(i=26;i--;)d=(i+3*t)%26,I=C(d*.7)>0?1:0,x.beginPath(),x.arc(480,270,I?(d*22):(600-d*22),0,6.4),x.lineWidth=12,x.stroke()

Jan 28 2017 9:13 PM UTC

}// 135/140

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Optical illusion: Go fullscreen and stare at the center for 15-30 seconds. Then look down at your keyboard. Notice anything unusual?

u/iverjo

129 characters: c.width=960;for(i=26;i--;)d=(i+3*t)%26,I=C(d*.7)>0?1:0,x.beginPath(),x.arc(480,270,I?d*22:600-d*22,0,7),x.lineWidth=12,x.stroke()
u/iverjo

#opticalillusion

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Ohead

function u(t) {

x.fillStyle='#000'
t?t:x.fillRect(0,0,9e9,9e9)
x.fillStyle='#fff'
if(t<4){for(i=0;i<1980;i++)x.fillRect(i-90,S(i/30)*20+i*(t-2)*5+520,5,5)}

Jan 23 2023 9:14 PM UTC

}// 139/140

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A Wavy Pattern

u/magna

So very pretty!
u/magna

#opticalillusion as well

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metamero

remix of d/11172 by u/metamero

function u(t) {

eval(unescape(escape`挮睩摴栽ㄹ㈰㭣⹳瑹汥⹢慣歧牯畮搽✣㤹㤧㭦潲⡰㴮㔻瀼㤹㬫⭰⥦潲⡱㴰⸵㭱㰹㤻⬫焩睩瑨⡸⥢敧楮偡瑨⠩ⱡ牣⡲㵰⨹㤬猽焪㤹ⰱ㌬〬㜩ⱦ楬汓瑹汥㴧⍦晦✬晩汬⠩ⱦ楬汓瑹汥㵒⠩ⱦ楬汒散琨爭㤱ⱳⴹㄬ㠳ⰸ㌩`.replace(/u(..)/g,"$1%")))

Nov 27 2018 12:01 PM UTC

}// 140/140

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Find the Black Dots - Scintillating Grid Illusion

u/metamero

c.width=1920;c.style.background='#999';for(p=.5;p<99;++p)for(q=0.5;q<99;++q)with(x)beginPath(),arc(r=p*99,s=q*99,13,0,7),fillStyle='#fff',fill(),fillStyle=R(),fillRect(r-91,s-91,83,83)
u/metamero

#OpticalIllusion #Scintillating #Grid #Illusion
u/katkip

#illusion
u/metamero

#ScintillatingGridIllusion

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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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