Dweets by u/13thptr

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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13thptr

function u(t) {

h=N=M=0
for(i=18;i--;x.stroke(new Path2D(`M500 500L${M+(b=500)} ${N+b}L${O+b} ${P+b}`)))O=M,P=N,M=C(h+=Math.atan2(99,r=i**.5*99))*r,N=S(h)*r

Jun 28 2019 9:33 PM UTC

}// 140/140

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Spiral of Theodorus

u/donbright

awesome
u/13thptr

#spiral #math #path2d
u/13thptr

Thanks to u/joeytwiddle for the golfing help

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13thptr

function u(t) {

s=~~t+"";throw s.split``.map((e,i)=>(r="IXC",d="VLD"[i=s.length-1-i],b=r[i],e<4?b.repeat(e):e-4?e-9?e>4&e<9?d+b.repeat(e-5):0:b+r[i+1]:b+d))

May 30 2019 10:47 AM UTC

}// 140/140

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Counts up to 899

u/13thptr

Thanks to u/KilledByAPixel for the golfing help :)
u/joeytwiddle

optimvm laborvs!
u/13thptr

turns out someone made a more elegant and "general" implementation. The function is 136c long but it's not callable without compression inside Dwitter: https://codegolf.stackexchange.com/a/77961

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13thptr

function u(t) {

c.width=w=400;x.fillText(x.font=m="17px Hello",0,19)
x.getImageData(0,0,w,j=99).data.map((e,i)=>e&&x.fillRect(j*C(i%w*.016-t)+j,i/w,3,3))

Dec 28 2018 11:13 AM UTC

}// 137/140

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Somewhat ambiguous because of implicit orthographic projection

u/13thptr

(first dweet :D)
u/13thptr

add |0 after i/w for a more solid look
u/lionleaf

Nice! Glad to see you make a first dweet :D
u/jylikangas

Welcome! Very nice 1st Dweet! Golfed to 131b -> c.width=w=400; with(x)getImageData(fillText(font="17px Hello",0,19),0,w,j=99).data.map((e,i)=>e&&fillRect(j*C(i%w/63-t)+j,i/w,3,3))
u/13thptr

thanks for the nice comments ! u/jylikangas cool tricks but it seems like inlining fillText in getImageData won't work in FF :(

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