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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katkip

remix of d/9375 by u/katkip

function u(t) {

function F(a,b){return C(a+b+t)<S(a-b)};c.width=w=100;for(i=0;i<=w;i++)for(j=0;j<w;j++)if(F(i,j))x.fillRect(i-1,j-1,1,1)

Aug 23 2018 12:20 PM UTC

}// 120/140

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Visual #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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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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E-Mouse

remix of d/8390 by u/E-Mouse

function u(t) {

for(c.width|=i=2e3;i--;)x.fillRect(S(t*3+i/15)*i+960,C(t*2+i/15)*i+540,W=i/25,W)

Jun 4 2018 1:37 PM UTC

}// 80/140

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Which way is it spinning? #illusion

u/katkip

Both

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