Top dweets by u/robbyg

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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Current theme challenge: #Opposites

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robbyg

function u(t) {

c.width^=0;for(i=h=540;i--;)x.lineTo(960+C(i)*h*S(t-i**4),h+S(i)*h*C(t+i**4));x.strokeStyle=`hsl(${t*60},80%,30%)`,x.stroke(),x.beginPath()

Apr 4 2018 9:47 PM UTC

}// 139/140

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robbyg

remix of d/13594 by u/robbyg

function u(t) {

c.width|=0
p=1.57
with(x)for(h=170,w=120;h--;)v=~~(h/17),beginPath(),moveTo(H=h%17*w,V=v*w),fill(arc(H,V,60,a=t+h%2*p+v%2*p*2,p*3+a))

May 2 2019 5:52 PM UTC

}// 133/140

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Synchronized pacpersons.

u/robbyg

Inspired by https://twitter.com/joey_aronson/status/1112…
u/katkip

no nazi lmao
u/Xen

love it!

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robbyg

function u(t) {

c.width|=0
x.shadowBlur=200
for(i=9;i--;x.fillRect(520+X,440,50,200))X=S(t)*400+i*100,x.shadowColor=x.fillStyle=`hsl(${X/4},70%,55%)`

Jan 11 2019 9:31 PM UTC

}// 133/140

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The rainbow behind #default

u/joeytwiddle

#rainbow

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robbyg

function u(t) {

c.width|=0
x.translate(w=960,h=540)
for(i=9;i--;)x.rotate(S(i+t)/3),x.fillRect(i*99+S(t)*300-480,-99,50,200)
x.translate(-w,-h)

Sep 28 2018 2:33 PM UTC

}// 127/140

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Drunken #default

u/sigveseb

niiiice
u/f8f82804

the last line isn't needed; resettting the width also clears any transform
u/f8f82804

103: c.width|=0;x.translate(960,540);for(i=9;i--;x.fillRect(i*99+S(t)*300-480,-99,50,200))x.rotate(S(i+t)/3)

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robbyg

remix of d/8195 by u/Barth

function u(t) {

with(x){for(a=192,c.width|=0;a--;)b=540+S(a/8-t)*40,lineTo(a*10,b);stroke();font="5em a";translate(980,b);rotate(C(t)/3);fillText("🚴",0,0)}

May 23 2018 7:49 PM UTC

}// 139/140

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u/Barth

He looks better

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robbyg

remix of d/17061 by u/robbyg

function u(t) {

for(c.width|=j=0;j<10;x.fillStyle=R(++j*30))for(i=540;i--;)x.fillRect(Math.acos(C(t+i*.9*j/1000))*520,i*2,i/2.5,2)

Jan 3 2020 7:40 PM UTC

}// 114/140

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u/katkip

fancy

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robbyg

remix of d/29683 by u/lonestar108

function u(t) {

for(i=1e4;i--;x.fillStyle=`hsl(${i/5+t*9},70%,50%)`)x.fillRect(960+i/20*S(i/50+5*t)+S(i/99)*i/9,540+i/20*C(i/50+3*t)+C(i/77)*i/8,3,3)

Mar 25 2024 4:15 AM UTC

}// 133/140

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Golfed. Feels like an early Windows screen saver.

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robbyg

function u(t) {

for(c.width|=i=684;i--;)x.fillRect(i%36*55+C(z=i/3+t*3)*7,3+55*~~(i/36)+S(z)*7,s=40+C(z)*2,s)

Jan 14 2020 8:07 PM UTC

}// 93/140

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Wavy.

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robbyg

remix of d/15194 by u/robbyg

function u(t) {

for(i=2e3;i--;x.fillRect(X,Y,1,1))d=Math.random()*420,X=960+C(d+i)*d,Y=540+S(d+i)*d,x.fillStyle=`hsl(9,50%,${90-Math.hypot(760-X,400-Y)/7}%`

Jul 30 2019 9:47 PM UTC

}// 140/140

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More realistic shading.

u/robbyg

You can change the position of the "light" by changing the two numbers in Math.hypot(). Also, golfing tips welcome!
u/pavel

Some golf tricks in d/12574
u/aleamb

#shading #sphere
u/Cloud

Render in Blender)

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robbyg

function u(t) {

c.width|=0,v=500;with(x)moveTo(h=t*v%2e3,v),lineTo(h+C(a=Math.abs(S(t*9)))*99,v+S(a)*99),arc(h,v,99,a,-a),fillStyle='#fe0',fill()

Jun 15 2018 5:30 PM UTC

}// 129/140

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#pacman

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