New #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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #ScaryMovies

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smtsjhr

function u(t) {

eval(unescape(escape`𩡯𬠨𪠽𝀻𪠭𛐻𚑻𩡯𬠨𪐽𞐶𞱩𛐭𞱸𛡦𪑬𫀨𚐩𮱵🐨𩀽𚁩𚰨𚀭𜐩𚠪𪠩𚡴𙐲𚐯𜐵𚐥𜐻𪰽𣑡𭁨𛡦𫁯𫱲𚁤𚐻𮀮𩡩𫁬𤱴𮑬𩐽𤠨𨰽𪐥𜠪𜠵𝐬𨰬𨰬𜐩𞱸𛡢𩑧𪑮𤁡𭁨𚀩𞱸𛡡𬡣𚀨𜠪𪰭𜐭𠰨𨐽𚀭𜐩𚠪𪰪𭐪𜰮𜐴𚐩𚠨𠐽𜠰𜀩𛀲𚡁𚠨𜰭𪠩𚱓𚁡𚐪𠐬𠐬𜀬𝰩𯑽`.replace(/u../g,'')))

Aug 5 2020 4:42 AM UTC

}// 140/140

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SOURCE (194/140): for(j=4;j--;){for(i=96;i--;x.fill()){u=(d=(i+((-1)**j)*t%2)/15)%1;k=Math.floor(d);x.fillStyle=R(c=i%2*255,c,c,1);x.beginPath();x.arc((2*k-1-C(a=(-1)**k*u*3.14))*(A=200),2*A*(3-j)+S(a)*A,A,0,7)}}

u/Billedluh

This is perfect good job
u/smtsjhr

thx Billedluh! : )
u/joeytwiddle

#illusion #opticalillusion
u/Qwitter

fantastic!

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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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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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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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KilledByAPixel

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁺👴🀱𛁩🐲𞐹𞱩𛐭𞱳𪁡𩁯𭱂𫁵𬠽𮠪𝀰𚑦𫱲𚁪🐹𞱪𛐭𞱦𪑬𫁒𩑣𭀨𦀽𮠿𪐪𞐹𞡩𚠹𛐹𞐬𦐽𮠿𭀪𝡥𜰺𭀪𝐴𜀭𝠰𜀬𭰽𮠿𜠹𞠹𛀨𮡼𯁍𨑴𪀮𪁹𬁯𭀨𦀭𞐶𜀬𦐭𝐴𜀩🠴𞀰𚐪𭰩𚑳𪁡𩁯𭱃𫱬𫱲👦𪑬𫁓𭁹𫁥👓𚁴𚡩𚡴𚡩𚐼𮠿𘠣𜀰𜀢𞠢𘱆𡡆𘠻`.replace(/u../g,'')))

Oct 24 2019 5:52 PM UTC

}// 140/140

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Dizzy Dots

u/magna

Dude.
u/katkip

#illusion #opticalillusion
u/Xen

Yess
u/KilledByAPixel

#Inktober day 24: Dizzy

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katkip

function u(t) {

eval(unescape(escape`𨰮𬱴𮑬𩐮𨡡𨱫𩱲𫱵𫡤👠𘰶𜀶𨀻𩠽𚁘𛁙𛁒𚐽🡻𩡯𬠨𪐽𜰻𪐭𛐻𚑸𛡢𩑧𪑮𤁡𭁨𚁸𛡦𪑬𫁓𭁹𫁥👛𘠣𩡦𜀢𛀢𘰰𜀰𘠬𘠣𩡦𩠢𧑛𪑝𚐬𮀮𩑬𫁩𬁳𩐨𦀫𤰨𪐪𜠩𚠱𝐬𦐬𜰰𛀲𜀬𤠬𜀬𝰩𛁸𛡦𪑬𫀨𚑽𞱦𫱲𚁪🐱𝀻𪠭𛐻𚑦𚀲𜀫𭀪𝀹𞐹𛁪𚠸𜀬𪠯𜰫𭀪𜰩`.replace(/uD./g,'')))

Oct 10 2019 3:04 PM UTC

}// 137/140

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#opticalillusion #compressed

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kooga

function u(t) {

a=5;b=1+parseInt(t*2,10);d=100;
c.width=a*d;
for(i=0;i<120;i+=1){
for(j=0;j<120;j+=1){
if(i*j%b)x.fillRect(i*a,j*a,a,a)
}
}

Oct 6 2019 3:19 AM UTC

}// 123/140

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divibility!

u/metamero

incidental #opticalillusion #ScintillatingGridIllusion

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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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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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rodrigo.siqueira

function u(t) {

x.fillStyle='gray';x.fillRect(250,440,1420,200)
x.fillStyle=R(t*70,t*70,t*70)
x.fillRect(t*510,0,9,1080)

Sep 27 2019 2:25 PM UTC

}// 104/140

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Illusory gradient grayscale ("Simultaneous Contrast Illusion"). The bar in the middle is a CONSTANT SHADE of gray. Viewing two colors at the same time influences both of their appearances. #gradient #illusion

u/iverjo

#opticalillusion

dwitter.net | #OpticalIllusion