Top dweets by u/DonKarlssonSan

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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DonKarlssonSan

remix of d/6041 by u/DonKarlssonSan

function u(t) {

t?x.stroke():(X=9,Y=9)
E=(n,i,a)=>n<=i?i:n>=a?a:n
r=p=>Math.random()*40-20+S(X/60)
for(i=99;i--;)x.lineTo(X=E(X+r(),0,2e3),Y=E(Y+r(),0,1e3))

Jan 15 2018 6:34 PM UTC

}// 140/140

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Random Walker With Stripe Pattern

u/iverjo

#random

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DonKarlssonSan

remix of d/5923 by u/DonKarlssonSan

function u(t) {

if(!window.a)a=new AudioContext,o=a.createOscillator(),o.connect(a.destination),o.start()
c.onmousemove=d=>o.frequency.value=d.clientX*3+440

Jan 11 2018 7:54 PM UTC

}// 140/140

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📣📢 Move the mouse! 🔉🔊

u/katkip

#audio ouch

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DonKarlssonSan

function u(t) {

r=_=>Math.random()*2e3
if(!t){x.globalCompositeOperation="xor"
for(i=0;i<99;i++){x.beginPath()
x.arc(r(),r(),r()/5+9,0,7)
x.fill()
}}

May 13 2021 11:30 PM UTC

}// 133/140

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XOR Circles

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DonKarlssonSan

remix of d/5940 by u/Xen

function u(t) {

c.width|=0
x.fillStyle="#6161"
x.translate(S(t)*399+960,S(t*2.3)*299+540)
for(i=34;i--;x.fillRect(s=i*i,s,s*=-2,s))
x.rotate(S(t)*.4)

Jan 12 2018 9:46 PM UTC

}// 133/140

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DonKarlssonSan

function u(t) {

x.fillStyle=`hsl(${(t+99)**9%360},70%,60%)`
for(i=0;i<999;i++)r=(t*i)**4*2e5%2e3,s=(t*i)**6*3e5%1080,
x.fillRect(r,s,50,4)

Jan 12 2018 9:35 PM UTC

}// 122/140

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DonKarlssonSan

function u(t) {

t||x.translate(X=960,540)
x.lineWidth=6
x.rotate(0.03)
x.strokeStyle=`hsla(${t*20},90%,50%,.4)`
x.strokeRect(C(t)*400,S(t)*400,200,200)

Jan 7 2018 5:42 PM UTC

}// 136/140

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u/DirtyDan

you nailed the color cycle!
u/DonKarlssonSan

Thanks DirtyDan!
u/DirtyDan

Borrowed your color line for this: d/5723

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DonKarlssonSan

remix of d/5628 by u/DonKarlssonSan

function u(t) {

c.width=1920;w=960;h=540;for(i=1;i<t*20;i++){a=2/t*i;x.beginPath();x.moveTo(C(a)*h+w,S(a)*h+h);x.lineTo(C(a*t)*h+w,S(a*t)*h+h);x.stroke();}

Jan 6 2018 1:56 PM UTC

}// 140/140

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Inspired by the Mathologer Youtube video "Times Tables, Mandelbrot and the Heart of Mathematics" https://www.youtube.com/watch?v=qhbuKbxJsk8

u/Purpzie

Shortened by 12 characters: c.width|= h=540;with(x)for(i=1;i<t*20;stroke())a=2/t*++i,beginPath(),moveTo(C(a)*h+960,S(a)*h+h),lineTo(C(a*t)*h+960,S(a*t)*h+h)

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DonKarlssonSan

function u(t) {

c.width=1920
for(X=0;X<1920;X++) {
  for(y=0;y<70;y++) {
    x.fillStyle=R((S((X+y*3+t)/50)+1)*127,t,0,1)
    x.fillRect(X,y+500,1,1) 
  }
}

Jan 12 2021 6:00 PM UTC

}// 140/140

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Candy Cane

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DonKarlssonSan

remix of d/6038 by u/DonKarlssonSan

function u(t) {

E=(n,i,a)=>n<=i?i:n>=a?a:n
r=p=>Math.random()*80-40
t?x.lineTo(X=E(X+r(),0,1920),Y=E(Y+r(),0,1080)):(X=960,Y=540)
x.stroke()

Jan 14 2018 8:27 PM UTC

}// 124/140

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Constrained Random Walker with correct init code (thanks XEN!)

u/Xen

not a problem, looking good.
u/Qwitter

Drink a ton of coffee and etch the sketch !

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DonKarlssonSan

remix of d/5770 by u/DonKarlssonSan

function u(t) {

c.width|=w=960
h=540
for(i=0;i<45;i++){x.save()
x.translate(w,h)
x.rotate(S(t*3+i/3)/5)
x.strokeRect(-(s=i*(9+i))/2,-s/2,s,s)
x.restore()}

Jan 8 2018 10:23 PM UTC

}// 138/140

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