New #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.

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

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katkip

remix of d/12171 by u/katkip

function u(t) {

eval(unescape(escape`挮睩摴株㴱㭸⹦楬汒散琨〬㐰〬㉥㌬㈰〩㭦潲⡩㴱㭩⬫㰹㬩砮晩汬剥捴⠲〰⭩⨱〰⭓⡴⤪㌰〬〬㔰ⰲ攳⤻景爨椽ㄻ椫⬼㤻⥸⹣汥慲剥捴⠲〰⭩⨱〰⭓⡴⬮ㄷ⤪㌰〬㐰〬㔰ⰲ〰⤻`.replace(/u(..)/g,"$1%")))

Feb 5 2019 6:05 PM UTC

}// 125/140

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#default #illusion

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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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metamero

function u(t) {

document.body.outerHTML=t?s+=` NN ИИ`:s='<code style=font-size:25px>'

Jan 15 2019 1:30 PM UTC

}// 69/140

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N И Zöllner Illusion - thanks to prof. Akiyoshi Kitaoka - vertically aligned columns appear to tilt alternately

u/metamero

#illusion #zöllner #zollner
u/metamero

see d/11254 for ref on tilt illusions

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metamero

remix of d/11514 by u/metamero

function u(t) {

eval(unescape(escape`䴽琿䴮浡瀨⡭Ⱬ⤽㹸⹦楬汒散琨津渪測樽洭津測ㄵⰱ㔬䤽愽㸨洫愫ㄴ㐩┱㐴⥼欿ⴭ欿䵛歝㩈㵶┲㽉⡶⩮⤺䤨瘫ㄩ╮⭪㩇㵭Ᵽ⹷楤瑨㴲㔶⤺孆偓㵮㴱㘬瘽〬潮步祤潷渽攽㹶㵥⹷桩捨ⴳ㥝㭇幈籼䴮畮獨楦琨䤨䜫㤩⤻`.replace(/u(..)/g,"$1%")))

Dec 23 2018 9:11 PM UTC

}// 140/140

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#snake #game : play with arrows : best on fullscreen : try to fill ;)

u/metamero

scintillating grid #illusion happens when screen is filled

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katkip

function u(t) {

c.width*=1;for(i=340;i--;)x.beginPath(),x.ellipse(960+S(i/3+t)*900,540+C(i/3+t)*300,i,i*2,i,0,1,20),x.fillStyle=i%2?'#ff2':"#f0f",x.fill()

Dec 22 2018 7:04 PM UTC

}// 138/140

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#illusion

u/magna

Wow!
u/joeytwiddle

It really looks like it's moving!
u/katkip

i feel irony

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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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ETHproductions

function u(t) {

eval(unescape(escape`景爨挮睩摴栦㵩㴭ㄷ㭩⬫㰱㌻⥦潲⡪㴭ㄷ㭪⬫㰱㌻砮晩汬剥捴⠨ㄵ⭱⨨樭椩⤪㘴⭓⡴⨴⤪搬⠱㔫焪⡩⭪⤩⨴〫䌨琪㐩⩤ⰹⰹ⤩娽椾〦樾〿〺樼椿樺椬堽樭娬夽椭娬焽⴨堼㔦夼㔦ⵚ㰵⥼ㄬ搽焪㐪⡘⭙ⵚⴶ⤫㈴`.replace(/u(..)/g,"$1%")))

Dec 7 2018 7:08 PM UTC

}// 138/140

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#cube in a corner

u/ETHproductions

Based on a tweet which I've just realized is *not* by beesandbombs: https://twitter.com/jn3008_/status/107080665…
u/katkip

This is awesome
u/katkip

uncompressed: for(c.width&=i=-17;i++<13;)for(j=-17;j++<13;x.fillRect((15+q*(j-i))*64+S(t*4)*d,(15+q*(i+j))*40+C(t*4)*d,9,9))Z=i>0&j>0?0:j<i?j:i,X=j-Z,Y=i-Z,q=-(X<5&Y<5&-Z<5)|1,d=q*4*(X+Y-Z-6)+24
u/katkip

#illusion
u/joeytwiddle

#form_from_motion

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metamero

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㵫㴰ⱺ㴷㈬礽㈰㭫㰸㤵㭫⬫⥩㴨款㸵⤦㌱ⱪ㴨款㸱⤦ㄵⱰ㵺⩩ⱱ㵺⩪ⱸ⹲散琨瀫⡫☲㼴㨴㠩ⱱ⬨欦ㄿ㐸㨴⤬礬礩Ⱬ☱㼰㩩⭪☱㼰㩸⹲散琨瀬焬稬稩㭸⹦楬氨❥癥湯摤✩`.replace(/u(..)/g,"$1%")))

Dec 2 2018 4:33 PM UTC

}// 127/140

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finding new patterns with strong effects of the #enhancedcheckeredillusion [#illusion proposed by a. kitakoa in 2001, ref. bellow]

u/metamero

Kitaoka, A. (2007). Tilt illusions after Oyama (1960): A review. Japanese Psychological Research, 49, 7-19.
u/metamero

http://www.psy.ritsumei.ac.jp/~akitaoka/tilt…
u/metamero

for(c.width|=k=0,z=72,y=20;k<895;k++)i=(k>>5)&31,j=(k>>1)&15,p=z*i,q=z*j,x.rect(p+(k&2?4:48),q+(k&1?48:4),y,y),k&1?0:i+j&1?0:x.rect(p,q,z,z);x.fill('evenodd')

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katkip

remix of d/11231 by u/katkip

function u(t) {

t||(a=-1,b=0);for(p=69;p--;)x.fillStyle=`hsl(${(b%a+a%b)*frame/3} 99%${50+S(a**b)*10}%)`,x.fillRect(a*10,b*10,10,10),a++,a>192?(b++,a=-1):0;

Dec 1 2018 1:54 PM UTC

}// 140/140

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Visual #illusion . If you move your eyes, this moves too.

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metamero

remix of d/11217 by u/metamero

function u(t) {

eval(unescape(escape`景爨稽㜲Ᵽ⹷楤瑨簽欽〻欼㐴㤻⬫欩椽款㸴ⱪ㵫☱㔬瀽稪椬焽稪樭稬⠨椫権┲㽸⹲散琨瀬焬稬稩㨰⤬砮牥捴⡰⬴ⱱ⬴⭺⩃⡴⤪⨨欥㜩ⰲ〬㈰⤬砮牥捴⡰⬴㠬焫㐸⭺⩓⡴⤪⨨欥㔩ⰲ〬㈰⤻砮晩汬⠧敶敮潤搧⤻`.replace(/u(..)/g,"$1%")))

Nov 30 2018 9:17 PM UTC

}// 138/140

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#Trippy #Illusion by [metâmero]

u/metamero

for(z=72,c.width|=k=0;k<449;++k)i=k>>4,j=k&15,p=z*i,q=z*j-z,((i+j)%2?x.rect(p,q,z,z):0),x.rect(p+4,q+4+z*C(t)**(k%7),20,20),x.rect(p+48,q+48+z*S(t)**(k%5),20,20);x.fill('evenodd');
u/iverjo

#opticalillusion

dwitter.net | #Illusion