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: #ScaryMovies

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KilledByAPixel

function u(t) {

for(c.width=k=800;k--;x.fillText('⬤',X-(q=3+S(Math.hypot(393-X,227-Y)/99-t)**3*49)*S(t*6),Y+q*C(t*6)))j=k%23,X=k*1.1+j%2*13-49,Y=j*26-49

Jan 27 2020 11:45 PM UTC

}// 136/140

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🐝💣 https://twitter.com/beesandbombs/status/1205…

u/katkip

#illusion #Beesandbombs

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KilledByAPixel

function u(t) {

with(x)arc(960,540,t*t,(t%8>4?t:-t)/3,99),setLineDash([t*t/5]),stroke(),setLineDash([]),globalAlpha=1-S(t%4*.8),beginPath(stroke())

Oct 13 2020 7:43 PM UTC

}// 131/140

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Circle Spiral #slowdraw

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Exca

function u(t) {

with(x){drawImage(c,0,6)
fillStyle="#fff"
fillRect(0,0,1920,6)
fillStyle=R()
w=S(t)*C(t^7)*400+480
fillRect(0,0,w,9)
fillRect(1920-w,0,w,9)}

Jan 16 2018 5:02 PM UTC

}// 140/140

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u/sigveseb

cool
u/joeytwiddle

#pattern #shape #face #vase #illusion

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rodrigo.siqueira

remix of d/17426 by u/rodrigo.siqueira

function u(t) {

for(i=880;i--;x.fillStyle=R(Y/2.5-r/(350+S(t*2)*300),0,r/2000,.8))x.fillRect(X=S(r=i*i)*i*3+i*C(t*3)+900,Y=C(r)*i+390+S(t*2)*i/3,i,i)

Jan 31 2020 6:05 PM UTC

}// 133/140

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Underwater lava cave #perspective

Show more comments…
u/tomxor

I keep switching perception between cave and mountain top, it gets stuck on mountain top... i can't control it 😳
u/sigveseb

I don't see mountain top 🤔 how?!
u/tomxor

funny, i can't see anything else now... it;s like looking down from above a mountain peak. Maybe imagine you are looking down from a circling helicopter.
u/rodrigo.siqueira

This #illusion is called "bistable perception". When I posted it was looking like a cave, now it seems to keep changing between mountain top and cave. I prefer a cave.
u/sigveseb

yes, I see it now!
u/rodrigo.siqueira

#tunnel
u/joeytwiddle

To see the mountaintop, maybe look at the blue and imagine it is the floor or the sea, far away.

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metamero

remix of d/11818 by u/metamero

function u(t) {

document.body.outerHTML=t?s+=` ИИ NN`:s='<p style=line-height:.6;font-size:25px;font-family:monospace>'

Jan 15 2019 2:24 PM UTC

}// 105/140

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ИИ NN Zöllner Illusion

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𮀮𩡩𫁬𤡥𨱴𚀰𛀰𛁣𛡷𪑤𭁨𯀽𫀽𜠴𜀬𪐽𜱥𝀩𛁸𛡦𪑬𫁓𭁹𫁥👠𘱦𜀰𜱠𞱩𛐭𞱸𛡦𪑬𫁒𩑣𭀨𦀬𦐬𬰽𚀸𚱓𚁓𚁰👍𨑴𪀮𨑴𨑮𜠨𨐬𨠩𚱤𚠪𛠲𝐩𚡤𛱬𚐪𤰨𠰨𬀩𚡤𛰹𚱃𚁴𚐪𝐰𚐪𞀩𛁳𚐩𩀽𚁡🐹𝠰𛐨𦀽𪐥𫀪𞐩𚐪𚠲𛱬𚰨𨠽𝐴𜀭𚁙🐹𚡩𛱬𚐩𚠪𜠯𫀻`.replace(/u../g,'')))

May 5 2023 6:13 PM UTC

}// 140/140

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I'm saddened that I didn't notice the white space at the bottom, before I posted this and viewed it in dark mode ;/ oh well.

u/Joachim

Looks like an #illusion
u/Xen

love it!

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rep_movsd

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑻𨰮𭱩𩁴𪀽𨰮𪁥𪑧𪁴👚🐱𜠷𛁦𪑬𫁓𭁹𫁥🐧𘰵𞁦𙰬𩡩𫁬𤡥𨱴𚀰𛀰𛁚𛁚𚐬𭀪🐹𞰊𦰱𜠬𜐴𛀱𜱝𛡭𨑰𚁂🐾𬱴𬡯𪱥𚁮𩑷𘁐𨑴𪀲𡀨𨁍𙁻𠡽𘀱𞑨𜰹𫀹𛐹𪀭𜰹𮡶𜰹𪀳𞑶𛐳𞑬𞐭𞑶𜰹𫀭𞐠𞑠𛁳𭁲𫱫𩑓𭁹𫁥👒𚁋👃𚁴𛐽𜠩𚡚𚱚𛁋𛁋𚐩𚐩𯐻`.replace(/u../g,'')))

Jul 13 2021 11:27 AM UTC

}// 138/140

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Cube shift #opticalillusion #illusion

u/rep_movsd

From https://twitter.com/jagarikin/status/1413091…
u/danny@hille.dk

That really messed with my brain

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KilledByAPixel

remix of d/18160 by u/rodrigo.siqueira

function u(t) {

for(c.width&=j=3e3;j--;x.lineTo(448+S(a=i*.209+t*9)*r,600+C(a)*r/2-i))i=(j/4+(j%4!=2)*60|0)-t%1*40,r=i**3/2e5
x.stroke()

Apr 6 2020 10:04 PM UTC

}// 120/140

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#Vortex

u/ivylab

I have been waiting for the view to zoom out more for a minute. But it's seriously continuous! Amazing
u/KilledByAPixel

Thank you, it was tricky to get this one right.
u/KilledByAPixel

#illusion

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New_Core

function u(t) {

for(c.width|=i=11;i--;x.fillRect(-1e3+400*S(a=(i-~~(t*9))/1.91),500+400*C(a),b,b))x.shadowColor=R(x.shadowOffsetX=2e3,x.shadowBlur=b=70,300)

Nov 28 2018 12:17 PM UTC

}// 140/140

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put your mouse arrow in the middle of the circle and let your eyes rest on it.. you will see a green dot and if lucky the pink spots will also disappear

u/metamero

#OpticalIllusion
u/katkip

Awesome #illusion

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KilledByAPixel

function u(t) {

for(t*=b=540,i=3e3;j=i--/470;x.fillRect(960+t*S(j),b+t*C(j),9,9))a=(i/64+(t>>6)|0)%2,x.fillStyle=t%64<9?a^t>b?R():'#fff':R(b*!a,t/5,b*a)

Oct 2 2020 6:44 PM UTC

}// 136/140

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False Motion Optical Illusion 👁️👁️

u/KilledByAPixel

#illusion

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