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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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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ciaccodavide

function u(t) {

eval(unescape(escape`𭁼𯁸𛡦𪑬𫁒𩑣𭀨𜀬𜀬𭰽𜡥𜰬𭰬𬠽𣑡𭁨𛡲𨑮𩁯𫐩𒡦𫱲𚁮🐳𩐳𞱘👲𚀩𚡷𛁙👲𚀩𚡷𛁤👍𨑴𪀮𪁹𬁯𭀨𦀭𞐶𜀬𦐭𝐴𜀩𛰹𛁮𛐭𞰩𮀮𩡩𫁬𤡥𨱴𚁘𛁙𛀴𛁴🀱𛁸𛡦𪑬𫁓𭁹𫁥👒𚀨𩀼𜰰𚐪𭰬𜀬𚁤🠳𝠩𚡷𚐩`.replace(/u../g,'')))

Dec 9 2021 10:46 AM UTC

}// 121/140

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#illusion #opticalillusion

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anotherkitten

function u(t) {

c.width|=0
for(k=270,j=0;k--;j-=S(k/9)>0?1:-1)for(i=40;i--;)x.fillRect(i*99-400-k*C(t*.887)+j*(S(t)*6),k*4,49,4)

Oct 25 2021 2:25 PM UTC

}// 112/140

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shifting floors in the black lodge

u/Xen

nice!
u/DataMeta

#opticalillusion

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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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danny@hille.dk

remix of d/24032 by u/danny@hille.dk

function u(t) {

c.width=w=218;for(i=3e4;i--;)x.fillRect(X=i%w,Y=i/w|0,(z=C(X/w*25-t*9)/S(Y/w*14-t*9)>1?.8:-1)-S(t*4-X/z/w)+C(t*5-Y/z/w),z)

Oct 7 2021 5:20 PM UTC

}// 122/140

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fake lighting + fake embossing (it's all fake remix)

u/danny@hille.dk

109b lores version: c.width=w=99;for(i=6e3;i--;)x.fillRect(X=i%w,Y=i/w|0,.8,C(X/8-t*2)/S(Y/13-t*3)>1?.8:-1-S(t*2-X/w)+C(t*2-Y/w))
u/DataMeta

#opticalillusion
u/danny@hille.dk

#hexagon

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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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Tekmap

remix of d/22995 by u/Tekmap

function u(t) {

c.style.filter=`blur(1vw)contrast(50`
for(c.width|=z=i=19;i--;)for(j=2*z;j--;)x.fillRect(99+i*99+S(t-j/69*z)*300,500+j*z,50,z)

Jun 25 2021 2:10 PM UTC

}// 126/140

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Herringbone

u/DataMeta

#opticalillusion

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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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rodrigo.siqueira

remix of d/21257 by u/Xen

function u(t) {

for(i=2e3,f=g=>i*g(i/t+i**7);i--;x.fillRect(950+f(C),540+f(S),9/t,1+9/t))x.fillStyle=`hsl(${i/30},80%,${S(i/1e5+t)*99}%,.2`

Jan 13 2021 11:39 PM UTC

}// 123/140

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Dots of light

u/Qwitter

awesome, Im not sure why, but i think this frightens me after staring at it for a while.
u/Xen

nice!
u/iverjo

Put it in fullscreen and look at the center for at least 10 seconds - it might look like the big parts move in a wavy motion. #opticalillusion
u/joeytwiddle

Instructions unclear. Summoned Cthulu.
u/Qwitter

#barkfleshwound

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ciaccodavide

remix of d/20865 by u/ciaccodavide

function u(t) {

for(c.width|=i=192;i--;)x[s='fillStyle']=`hsl(0,0%,${i*.6}%`,x.fillRect(i*10,0,192,2e3)
x[s]=`grey`
x.arc(960+S(t)*500,540,400,0,7)
x.fill()

Nov 30 2020 11:59 AM UTC

}// 140/140

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Same Grey Circle

u/ciaccodavide

#illusion
u/DataMeta

fun. we explored this #opticalillusion differently :) d/15843 #gradient
u/joeytwiddle

To add a second ball: x.arc(960-S(t)*500,540,300,0,7)

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