Dweets awesomed by u/richev

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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Xen

function u(t) {

for(i=1e3;i--;)x.fillText(i,i|t*i,i)

Jun 27 2019 6:15 PM UTC

}// 36/140

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36byte #sierpinski triangle

u/KilledByAPixel

Nice! You can also use & instead of | for a slightly different style. i&i/t is also good
u/Xen

i'd say the last is my fav i&i/t
u/donbright

ugh i dont understand how it works.

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rodrigo.siqueira

function u(t) {

for(c.width=w=i=2e3;i--;)
X=S(i*i),Y=S(i),ℵ=C(Math.atan2(X,Y)-t)*Math.hypot(X,Y),
K=w/2,x.fillRect(w*ℵ/(Z=4+C(t)+X*X-Y*Y)+K,w+K*(ℵ-6)/Z,7,8)

Jun 26 2019 7:01 PM UTC

}// 140/140

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The Hyperbolic Paraboloid (z=x²-y²). The S(i*i) and S(i) are random number generators between -1 and +1. The atan2 and hypot are used to calculate 3d object rotation (Euler equations could also be used, as seen on /d/12086). Thanks to u/cantelope for the Tiny 3D Engine Tutorials: https://cantelope.org/tiny_3D/ and https://cantelope.org/3D/ #math #hypot #D3 #hyperbolic #surface

u/cantelope

:D
u/rodrigo.siqueira

There is an interesting fact that the Pringles potato chips are a truncated hyperbolic paraboloid. The strength of the shape helps to prevent them from breaking while stacked. The curvature of the shape improves resistance to tension and compression forces. Remember this next time you eat a hyperbolic paraboloid.

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KilledByAPixel

function u(t) {

with(x)for(fillRect(0,0,2e3,2e3),i=149;i--;stroke())for(beginPath(j=9);j--;arc(960,540,i*8,a=j*.785+5*S(i/7+t*4)/19,a))strokeStyle=R(i*9,i)

Jun 25 2019 2:19 PM UTC

}// 139/140

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Twisted Spiral

u/Xen

love it!
u/loktar

Oh this is badass
u/aleamb

wow
u/donbright

this looks amazing in full screen

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pavel

function u(t) {

for(i=c.width|=0;r=S(k=--i>>6)**2;x[i%64?'fillRect':'clearRect'](7-k/4,0,r,r))x.setTransform(99,0,0,42,960,32*k+(i%64*r||3)),x.rotate(3*t+k)

Jun 7 2019 6:27 AM UTC

}// 140/140

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#box #tornado #d3

u/aleamb

amazing!
u/donbright

how the....
u/KilledByAPixel

❒
u/vain

hard to believe... top!

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katkip

remix of d/14469 by u/katkip

function u(t) {

c.width*=1;x.lineWidth=9;for(i=211;i--;)x.beginPath(),r=S(t+i/59+S(t+i/29))+1.1,x.arc(960,140,10+i*4,r,r+1),x.stroke()

Jun 6 2019 2:46 PM UTC

}// 118/140

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u/joeytwiddle

Spooky

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pavel

function u(t) {

with(x)for(i=4;i--;fill())for(beginPath(j=4),fillStyle=i?R(a=128+50*S(~i%3+13*t),a,a):'#868';a=j--/.64;)arc(960,536-~i%3*5,i<3?300:3e3,a,a)

Jun 6 2019 4:36 AM UTC

}// 139/140

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The Perpetual Diamond #illusion

Show more comments…
u/pavel

Contrast Reversals Along Thin Edges Create the Appearance of Motion in Objects
u/pavel

https://doi.org/10.1177/2041669518815708
u/katkip

Wow
u/metamero

beautiful!!! #opticalillusion
u/SMON

It's grest but cannot hold a candle to some of your other works. :)
u/agshapiro

love it!

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keithclark

remix of d/13682 by u/pavel

function u(t) {

for(c.width=i=460,o=[w=190];i--;o[i]=[C(a=.279*i+t/2)*C(i),S(a)*C(i),S(i)]);for([Z,X,Y]of o.sort())Z-=2,x.fillText('🔵',230+w*X/Z,140+w*Y/Z)

Jun 5 2019 3:52 PM UTC

}// 139/140

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Depth sorted balls. Iteration of a dweet by Pavel

u/Xen

nice
u/keithclark

155, with scaling - for(c.width=i=320,o=[w=99];i--;o[i]=[C(a=t+w*i)*C(i),S(a)*C(i),S(i)]);for([Z,X,Y]of o.sort())x.font=${5+Z--*3|0}px a,x.fillText('🔵',160+w*X/--Z,w+w*Y/Z)
u/aleamb

amazing!

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KilledByAPixel

remix of d/13431 by u/KilledByAPixel

function u(t) {

for(c.width=i=96;i--;)for(j=55;j--;x.fillText("Video 1",i,j+z))f=255*Math.random(z=i||j?0:9)+99*z,x.fillStyle=R(f-z*f,f,f),x.font=z+1+
"px'"

Jun 5 2019 7:30 AM UTC

}// 140/140

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Dang, now it's set to Video 1 and I lost the remote!

u/joeytwiddle

f*!z to save 1 char

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SMON

remix of d/14412 by u/katkip

function u(t) {

throw "🌊".repeat((5000-5*t)%40) + "🐠" + "🌊".repeat(5*t%40)

Jun 3 2019 9:11 PM UTC

}// 58/140

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SMON

remix of d/11577 by u/rodrigo.siqueira

function u(t) {

for(m=q=t*100|0,w=1;m-->q-400;r=m**.2*200,x.fill(x.arc(960+r*S(a=m**4),1e3+r*C(a)*.5,w,4,5)))x.beginPath(x.fillStyle=R((w=q-m)-100,w,w,.4))

Jun 3 2019 8:24 PM UTC

}// 139/140

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The Forest in the Crystal Ball

dwitter.net | richev (19706)