Top dweets by u/Irratix

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: #Opposites

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Irratix

function u(t) {

//EPILEPSY WARNING
for(i=c.width|=0;i-=.5;)x.fillRect(960+500*T(33*i+t/5),540+500*S(24*i+t/7),430,5)

Oct 11 2019 9:50 PM UTC

}// 100/140

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I decided to put the epilepsy warning in a comment for some reason. Just wanted to mess around with a parametric function, drawing as long lines I thought looked kinda trippy.

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Irratix

function u(t) {

(D=(n,m,o,p,q)=>{f=99*q;x.fillStyle=R(f,f,f,1);x.fillRect(n,m,o,p);q&&D(n,m,o/=2,p/=2,--q)+D(n+o,m,o,p,q)+D(n,m+p,o,p,q)})(0,0,1920,1080,8)

Oct 8 2019 10:40 AM UTC

}// 139/140

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Recursive method for generating a fractal triangle.

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Irratix

remix of d/15925 by u/Irratix

function u(t) {

c.width=1920
a=[]
x.beginPath()
for(i=0;i<200;i++){;x.lineTo(960+540*S(4.2*i+t)*C(t/7),540+540*C(2.1*i+t)*S(t/6))}
x.stroke()

Oct 4 2019 12:12 PM UTC

}// 125/140

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u/Xen

Nice!

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Irratix

function u(t) {

t*=60
for(i=[];i.length<t;i.push(t/i.length)){x.fillStyle=R(t/60%260,t%253,t%246,.1);x.fillRect(0,i[i.length-1],1e5,2)}x.drawImage(c,2,1)

Oct 3 2019 7:11 PM UTC

}// 137/140

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Scanlines

u/DataMeta

nice concept

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Irratix

remix of d/23081 by u/Irratix

function u(t) {

t&&A
for(i=456,c.width=455;i--;)for(j=256;j--;x.fillRect(i,j,1,1))x.fillStyle=R(...j&i^j?[~i&255|j,,j+i&201]:[,3*(i-9)*i%j<<2,i-100^j])

Jun 10 2021 7:15 PM UTC

}// 135/140

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static, but slightly higher res

u/KilledByAPixel

Full res... for(t*=60,j=2e3;j--;x.fillRect(t,j,1,1))x.fillStyle=R(...j&t^j?[~t&255|j,,j+t&201]:[,3*(t-9)*t%j<<2,t-99^j])

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Irratix

function u(t) {

F=i=>0.7*i+t/3
c.width|=0
n=540
for(i=9;i--;)for(j=i;j--;x.lineTo(960+n*S(F(j)),n+n*C(F(j))))x.moveTo(960+n*S(F(i)),n+n*C(F(i)))
x.stroke()

Oct 7 2019 11:02 AM UTC

}// 139/140

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Nonagon Infinity opens the door

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Irratix

function u(t) {

F=(h,w,l,a)=>{v=l%2;x.fillStyle=h;for(;a--;)x.fillRect(v?2*w*a:0,v?0:2*w*a,v?w:l,v?l:w)}
F('red',83,1e4,7)
F('blue',37,583,11)
F(0,53,768,6)

Oct 5 2019 9:40 PM UTC

}// 140/140

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American flag. Initialy I attempted it with a blue rectangle on top of which I added white rectangles for the stars, but I couldn't get it short enough. This looks way worse, but it's also way shorter. Would be curious to see if anyone can get a better looking US flag in this space.

u/yonatan

there's https://www.dwitter.net/d/14922 but it's compressed

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Irratix

function u(t) {

c.width=1920
a=[]
x.beginPath()
for(i=0;i<374;i++){x.moveTo(960+400*S(2.1*i+t),800+90*C(2.1*i+t));x.lineTo(960,100)}
x.stroke()

Oct 4 2019 12:02 PM UTC

}// 127/140

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Irratix

function u(t) {

c.width=1920;for(i=0;i<1920;i+=20)for(j=0;j<1080;j+=20,x.globalAlpha=S(i*j*t/5e3)**2,x.fillRect(i,j,20,20));

Oct 3 2019 9:29 PM UTC

}// 108/140

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Basics: fill every spot on the image but with a certain brightness. Define your own function based on the x,y coordinates (i,j) and t to turn it into an animation.

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Irratix

remix of d/20725 by u/ciaccodavide

function u(t) {

d=new Date()
x.fillText('\ud83d'+String.fromCharCode(56655+(d.getHours(x.font="9em'")%12||12)+(d.getMinutes()>29&&12)),888,606)
throw d

Nov 20 2020 3:05 PM UTC

}// 135/140

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We can always go shorter

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