Top dweets by u/DataMeta

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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DataMeta

remix of d/15843 by u/DataMeta

function u(t) {

s=C(t);c.style.background='#CCC';if(t<3)for(i=2e3;i--;)
x.fillStyle=R(l=i/7,l,l),x.fillRect(t*s>=0?1920-i:i,540-l*s*2,9,9)

Sep 29 2019 7:42 PM UTC

}// 122/140

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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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DataMeta

remix of d/15356 by u/DataMeta

function u(t) {

c.width=600;for(i=360;i-=8;)for(j=360;j-=8;)h=t*t**.4,
x.fillRect(122+i,j,g=((h^i)&(j^h))**.1*t%8,g)

Aug 9 2019 11:16 PM UTC

}// 100/140

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h=64+t*t**.4

u/rodrigo.siqueira

#sierpinski

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DataMeta

remix of d/15323 by u/DataMeta

function u(t) {

c.width=560;for(i=315;i-=7;)for(j=315;j-=7;)
h=20+t/7,x.fillRect(122+i,j,g=(h&j+h&i)**.1*t%7,g)

Aug 9 2019 3:16 AM UTC

}// 95/140

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Modify 20 in 20+t/7 to start at higher or lower complexity

u/DataMeta

Different start points change the order in which "pixel" sizes stack resulting in different sequences
u/DataMeta

i.e. 10,15,56,78

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DataMeta

remix of d/14521 by u/DataMeta

function u(t) {

r=Math.random,m=r(n=r());
for(j=768;j--;)x.fillStyle=R(o=255*n/m,o,o),
x.fillRect(64*(j%31),64*(j/31|0),T(t*m)*4,T(t*n)*4)

Jul 13 2019 1:45 AM UTC

}// 122/140

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fullscreen recommended

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DataMeta

remix of d/8350 by u/DataMeta

function u(t) {

j=(t*640);z=Math.random;m=z();n=z()
x.fillStyle=R(T(2.6+t*Math.PI)*540,k=128*m+16,208*n)
x.fillRect(j%1920,j%1080,k,k)

May 4 2019 3:37 AM UTC

}// 118/140

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More golfing & different palette

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DataMeta

remix of d/2537 by u/phst

function u(t) {

c.width=1920;for(i=0;i<128;i++){x.fillRect(i*16,540+S(1.62*t-i)*360,S(S(i-t)-t)*120,10+t+C(Math.PI*i-t)*360)}

May 29 2018 3:05 AM UTC

}// 109/140

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DataMeta

remix of d/8257 by u/DataMeta

function u(t) {

c.width=1920;for(i=0;i<120+t;i++){
x.fillStyle=R(172*S(t*.75),220*S(i+8*t),255*S(i*t*.33));
  x.fillRect(i*32,180-C(2*t+(i*6))*36,30,720);}

May 28 2018 3:33 AM UTC

}// 139/140

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DataMeta

remix of d/16682 by u/katkip

function u(t) {

throw(code+=t).slice(-79)

Nov 19 2019 10:10 PM UTC

}// 25/140

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w/ 25B

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DataMeta

remix of d/15201 by u/DataMeta

function u(t) {

r=Math.random;m=r(n=r());for(i=255;i--;)x.fillStyle=R(i*n,i*m,i/2,.7),
x.fillRect(960+S(t^i*n)*i/m*2,540+C(t^i*m)*i/n,S(t+i)/m,(t-i)/n)

Jul 30 2019 3:43 PM UTC

}// 135/140

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