Dweets by u/pythech

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: #Opposites

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pythech

remix of d/8671 by u/pythech

function u(t) {

with(x)for(i=7;i--;fillStyle=i?k?R():'#fff':'#fff1',fill())beginPath(k=i%2),arc(420+S(z=i+t)*k*770+500*(i-1>>1),500+90*C(z)*k,i?200:9e9,0,9)

Jun 20 2018 5:58 PM UTC

}// 140/140

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added trailing. Thanks u/zanella for the idea

u/Xen

nice style
u/DataMeta

great tweak to a neat idea

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pythech

remix of d/8669 by u/pythech

function u(t) {

c.width|=0
with(x)for(i=6;i--;fill(),fillStyle=k?'#fff':R())beginPath(k=i%2),arc(420+S(z=i+18*C(t))*k*50+500*(i>>1),500+50*C(z)*k,200,0,9)

Jun 20 2018 5:01 PM UTC

}// 138/140

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pythech

remix of d/8669 by u/pythech

function u(t) {

c.width|=0
with(x)for(i=6;i--;fill(),fillStyle=k?'#fff':R())beginPath(k=i%2),arc(420+S(z=i+t)*k*770+500*(i>>1),500+90*C(z)*k,200,0,9)

Jun 20 2018 4:56 PM UTC

}// 133/140

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u/joeytwiddle

Mind-twister! :D #opticallillusion

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pythech

function u(t) {

c.width|=0
with(x)for(i=6;i--;fill(),fillStyle=k?'#fff':R())beginPath(k=i%2),arc(420+S(z=1.2**t+i+t)*k*50+500*(i>>1),500+50*C(z)*k,200,0,9)

Jun 20 2018 4:54 PM UTC

}// 139/140

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pythech

remix of d/8651 by u/lionleaf

function u(t) {

c.width|=0
with(x)for(translate(900,500),i=7*t;~i--;fill())arc(5*i,!beginPath(fillStyle=`hsl(${i*9},99%,50%`),20*C(i*.9)+30,!rotate(3.88),9)

Jun 20 2018 3:48 PM UTC

}// 140/140

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Golfed back to the circles. Thanks to u/BalintCsala for the hsl trick

u/pythech

Rectangle version looks better anyway

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pythech

function u(t) {

c.width|=0
with(x)for(translate(900,500),i=10*t;i-->0;fill())beginPath(fillStyle='red'),arc(5*i,0,20*C(i*.9)+30,0,9),rotate(-Math.PI*2*.618)

Jun 18 2018 3:43 AM UTC

}// 140/140

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.618 is an approximation to the golden ratio. Putting .5 == 1/2 will create 2 spokes. Similarly .6 == 3/5 will create 5 spokes.

u/pythech

Inspired by Numberphile: https://www.youtube.com/watch?v=sj8Sg8qnjOg
u/DataMeta

I really dig it!
u/aleamb

love it!
u/zanella

You had me at "golden ratio".

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pythech

remix of d/8630 by u/pythech

function u(t) {

c.width|=0
with(x)for(i=3;i--;stroke())beginPath(lineWidth=r=100*C(t+3.14)+200),arc(650+250*i,700-i%2*434,r/2,z=i*2.095,5.235+z)

Jun 17 2018 9:24 PM UTC

}// 128/140

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Imaginary Triangle

u/lionleaf

#illusion
u/iverjo

#opticalillusion
u/Purpzie

You can save 1 character by putting arc(650+250*i,700-i%2*434,r/2,z=i*2.095,5.235+z) in the for loop before stroke()
u/Purpzie

oh wait no you can't it's the same, never mind

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pythech

remix of d/8630 by u/pythech

function u(t) {

c.width|=0
with(x)for(i=3;i--;stroke())beginPath(lineWidth=r=200*S(t/2)+300),arc(650+250*i,700-i%2*434,(1+C(t))*r*2,z=i*2.095,5.235+z)

Jun 17 2018 8:44 PM UTC

}// 134/140

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u/dorukcakmakci

very nice

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pythech

function u(t) {

c.width|=0
with(x)for(i=3;i--;stroke())beginPath(lineWidth=r=200*C(t/2+3.14)+300),arc(650+250*i,700-i%2*434,r/2,z=i*2.095,5.235+z)

Jun 17 2018 8:43 PM UTC

}// 130/140

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Imaginary Triangle

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pythech

remix of d/8537 by u/pythech

function u(t) {

c.width|=0
with(x)for(i=2;i--;stroke())beginPath(lineWidth=i?350:240),strokeStyle=i?'#252':'#3a5',arc(900,550,320,z=i?t:-t,z-C(t)*1.5-2)

Jun 17 2018 7:36 PM UTC

}// 136/140

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