Top dweets by u/pavel

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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pavel

remix of d/11101 by u/pavel

function u(t) {

for(f=i=405;i--;f=x[f?'fillRect':'clearRect'](-1,-1,2,2))x.setTransform(s=32+S((i+(j=i>>5)+t)*Math.PI)*16<<f,0,0,s,i%32*99,j*99),x.rotate(t)

Nov 21 2018 6:39 AM UTC

}// 140/140

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Dancing Squares #beesandbombs

u/pavel

This one took a lot of golfing. Calling rotate separately actually saves bytes as it avoids the scale definition / multiplication
u/katkip

!

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pavel

function u(t) {

for(c.width|=s=2;s--;)for(i=25+(t&s);i--;)for(k=6;k--;)x.arc(960,540,!!k*60*(i+s*(t%1)**9)*(2-s)**.5,a=(k+!s/2)*355/226,a);x.fill('evenodd')

Nov 20 2018 7:25 AM UTC

}// 140/140

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Diamondz #beesandbombs

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pavel

remix of d/11013 by u/pavel

function u(t) {

t?c.width=innerWidth:a=b=X=Y=0
onmousemove=e=>(X=e.x,Y=e.y)
x.fillText('B=D',!x.translate(a+=C(d=Math.atan2(Y-b,X-a)),b+=S(d)),!x.rotate(d))

Nov 17 2018 8:42 AM UTC

}// 140/140

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It's uh... a rocket #interactive

u/katkip

#nsfw
u/R1NZLER_

lmfao

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pavel

remix of d/10516 by u/pavel

function u(t) {

c.width^=t?onmousemove=e=>X=e.x/99:X=0
for(i=99;i--;x.lineTo(960+a*S(p)/.7,540+(i&4?a:-a)))a=960/(3+C(p=(i-(i>>2))*6.28/(t&7)-X))
x.stroke()

Oct 17 2018 7:06 PM UTC

}// 140/140

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#minimal #perspective #d3 #cube #interactive

u/aleamb

awesome!

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pavel

remix of d/10512 by u/f8f82804

function u(t) {

c.width^=t?onmousemove=e=>X=e.x/99:X=0
for(i=17;i--;x.lineTo(960+a*S(p)/.7,540+(i&4?a:-a)))a=960/(3+C(p=1.57*(i-(i>>2))-X))
x.stroke()

Oct 17 2018 4:40 AM UTC

}// 134/140

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#minimal #perspective #d3 #cube #interactive

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pavel

function u(t) {

t?0:X=Y=360
X-=Y>>4
Y+=X>>4
x.fillRect(960+X,540+Y,9,9)

Nov 1 2021 8:52 PM UTC

}// 55/140

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Minsky circle algorithm #circlechallenge

u/cantelope

>>8 creates an octagon, strangely
u/donbright

awesome
u/rep_movsd

x.fillText(t?0:X=Y=360,960+X,540+Y) Y+=(X-=Y>>4)>>4 works too

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pavel

remix of d/20267 by u/yonatan

function u(t) {

for(m=[i=c.width|=X=Y=0];j=i--/69;)m[i]=[j/5,X-=C(a=j+t<<j+t),Y+=S(a),R(i/8)];for([d,X,Y,x.fillStyle]of m)x.fillRect(960+X*d,540+Y*d,d*=9,d)

Oct 15 2020 7:02 PM UTC

}// 140/140

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#improved with color and depth

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pavel

remix of d/13711 by u/pavel

function u(t) {

for(let i=c.width|=f=g=>2*g(2*j/3)+g(-j/3);i--;x.fillText(i*i,960*(z+h(S))/z,540+960*f(C)/z))h=g=>S(j=i/130+5*t)*g(t)+f(S)*g(t+1.6),z=7-h(C)

Mar 8 2020 9:20 PM UTC

}// 140/140

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#trefoil ribbon

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pavel

remix of d/14846 by u/KilledByAPixel

function u(t) {

r=_=>Math.random();(frame-1)%600?0:d=r(m=r(c.width=960))
f=g=>260*((1-m)*g(a=8*t)+d*m*g(a-a/m))
x.lineTo(480+f(C),270+f(S));x.stroke()

Jul 1 2019 7:54 AM UTC

}// 134/140

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#spirograph generator

u/pavel

I believe this generates all valid spirographs, at least the circle with a small pencil hole rolling in a circle ones.
u/pavel

The incremental drawing is not parameter aware so at the extremes its too slow / too fast and choppy
u/pavel

I was gonna improve this by using the period of a spirograph but gave up deriving it.
u/pavel

I think the period is the denominator of 1-1/m expressed as an irreducible fraction.

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pavel

function u(t) {

for(i=c.width|=0,s=120;Y=--i>>4;x.fillRect(0,-60,s,s))x.setTransform(1,0,C(o=(S(e=S(d=S(b=S(t-=44)+t)+b)+d)+e)/4+.78)/4,S(o),i%16*s,s*Y-60)

May 18 2019 5:22 AM UTC

}// 139/140

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