Top dweets by u/gpolonus

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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gpolonus

remix of d/17830 by u/gpolonus

function u(t) {

c.width/=1
onmousemove=e=>c.a=e.x/15
f=(a,y)=>x.fillRect(a,y,9,9)
for(i=0;i++<2e3;)f(i,S(t+i/100*(c.a||0))*400+500)

Mar 8 2020 1:53 PM UTC

}// 115/140

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Variable Sine wave frequency. Move your mouse! #interactive

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gpolonus

function u(t) {

r=Math.random
w=r()
h=r()
x.beginPath()
x.arc(w*1920,h*1080,50,0,2*Math.PI)
x.fillStyle=R(255*w,255*h,255,0.5)
x.fill()

Mar 5 2019 4:22 PM UTC

}// 119/140

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Raindrops

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gpolonus

function u(t) {

w=960,h=540,c.width/=1,r=100,p=(i,f)=>f(t+i*1.05)*r
for(i=0;i<6;i++){x.moveTo(w,h)
x.lineTo(w+p(i+1,C),h+p(i+1,S))
x.stroke()}

Apr 8 2019 8:18 PM UTC

}// 126/140

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Spinning sticks

u/pavel

I am glad I looked at the code here because I learned the trick of passing in C or S to differentiate X vs Y coordinate. I used to pass an offset angle of pi/2 but this is much shorter. Nice!
u/pavel

For example this shaves off 6 chars from d/12567: for(c.width|=p=300;e=p--**.9%1;x.fillRect(960+r(S)/z,200+99/z,s=9*e/z,s))r=f=>p/(1+e*C(a=t/4+p))*f(a+p)+2*p/(1/e-e)*f(p),z=.5+r(C)/800
u/gpolonus

Thanks! I'm glad my simple windmill could help :)

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gpolonus

function u(t) {

f=(a,y)=>x.fillRect(a,y,9,9)||f
t||c.addEventListener('mousemove',e=>((a,y)=>f(a,y)(2e3-a,1e3-y)(a,1e3-y)(2e3-a,y))(e.x*3.4,e.y*3.4))

Mar 3 2020 7:17 PM UTC

}// 133/140

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Shorter 4 mouse cursors

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gpolonus

remix of d/27309 by u/gpolonus

function u(t) {

t||(m=[960,540])
r=t*3
x.fillStyle=R((m[0]+=r*S(r)/3)*.13,(m[1]+=r*C(r)/3)/4.23,150)
x.fillRect(...m,50,50)

Mar 30 2023 9:29 PM UTC

}// 107/140

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Spiral Journey of the Rect

u/Xen

nice!

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gpolonus

function u(t) {

t?0:b=17.3
onmousemove=e=>b=e.x/15
f=(a,y)=>(x.fillStyle=a%2?'#dee':'#abb',x.fillRect(a,y,9,9))
for(i=0;i++<2e3;)f(i,S(t+i/100*b)*540+540)

Mar 12 2020 2:04 AM UTC

}// 138/140

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Interactive argyle #interactive

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gpolonus

function u(t) {

onmousemove=e=>{c.width|=0;for(i=0;i<3e3;i+=50)for(j=0;j<2e3;j+=50){v=e.y*3-j;d=e.x*3.4-i;p=2e-3*(d*d+v*v)**.5;x.fillRect(i+d*p,j+v*p,9,9)}}

Mar 10 2020 7:57 PM UTC

}// 140/140

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Weird ball thing. Move the mouse to start #interactive

u/gpolonus

Tried to get a fabric of squares to gravitate towards the mouse, and got this instead. Adding +1 to the calculation of p gets close to what I wanted, but this looked cooler.

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gpolonus

remix of d/17924 by u/gpolonus

function u(t) {

t?0:d=[]
f=n=>Math.floor(n*.056)
r=s=>x[s](i*60,j*60,60,60)
onclick=e=>{i=f(e.x);j=f(e.y);d[i/j]=d[i/j]?r('clearRect')||0:r('fillRect')||1}

Mar 12 2020 4:56 PM UTC

}// 139/140

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Click for Squares! #interactive

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gpolonus

remix of d/17848 by u/gpolonus

function u(t) {

s=n=>(n+1)*127
for(i=80;i-->0;){x.fillStyle=R(s(S(t*i*3)),s(C(t*i)),s(S(C(t))),1);x.beginPath();x.arc(960,540,i*24,0,2*Math.PI);x.fill()}

Mar 5 2020 7:36 PM UTC

}// 137/140

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Hypnotism #trippy #colors #color

u/tongong

#lsd

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gpolonus

remix of d/13143 by u/gpolonus

function u(t) {

for(h=-99,c.width=200;h<200;h+=9)for(w=0;w<200;w+=20)for(i=0;i<6;i++)p=f=>w+f(t+i*1.05)*15,x.moveTo(w+h,w),x.lineTo(h+p(C),p(S))
x.stroke()

Apr 9 2019 11:23 PM UTC

}// 139/140

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Windmills with one less character

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