New #D3 dweets | Dwitter

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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katkip

remix of d/11892 by u/katkip

function u(t) {

c.width*=1;for(i=64;i--;)for(j=60;j--;)
x.fillRect(600+i*20-j*10,j*10+Math.abs(32-i-S(t*5)*9)*5+Math.abs(30-j+C(t*5)*9)*5,10,10)

Jan 19 2019 7:52 PM UTC

}// 128/140

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Resizing the roof! #d3

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katkip

function u(t) {

c.width*=1;for(i=12;i--;)for(j=35;j--;)x.ellipse(960,54+i*i*6,70*i,2*i+j*i/2,0,t,3+t);x.stroke()

Jan 19 2019 6:34 PM UTC

}// 96/140

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Jelly sliced in half #d3 improvisation

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katkip

function u(t) {

c.width*=1;f=(X,Y,s)=>{if(s>20)for(i=0;i<9;i++)x.fillRect(X+i*s*2+S(t)*s*6,Y,s,s*4),f(X+s,Y+s,s/1.3)};f(300,300,100)

Jan 17 2019 1:49 PM UTC

}// 116/140

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#d3 #recursive #recursion #default #perspective

u/metamero

nice idea. this can go better

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f8f82804

remix of d/11792 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;x.fillRect(X/d+960,Y/.8/d,s=45-5e3*d,s))r=i%2+1,d=Math.hypot(X=r*S(ϕ=i/612)*S(θ=i*37-t/r),Y=r*C(ϕ)+4,r*C(θ)*S(ϕ)+5)/1e3

Jan 15 2019 12:39 AM UTC

}// 140/140

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#d3 #perspective #projection #sphere using #hypot -- better #correction for the #distortion

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f8f82804

remix of d/11811 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;x.fillRect(X/d+960,Y/.5/d-64e2,s=36-d*1e4,s))a=S(ϕ=i/612),θ=i*37+C(i/99+t),d=Math.hypot(X=S(θ)*a,Y=C(ϕ)+9,C(θ)*a+5)/4e3

Jan 15 2019 12:36 AM UTC

}// 140/140

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my #d3 #hypot #perspective #projection of a #sphere #model with #distortion #correction -- in some previous dweets I did this wrong, resulting in an egg shape!

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f8f82804

function u(t) {

for(i=c.width^=0;i--;x.fillRect(X/d+960,Y/d-3e3,s=30-d*1e4,s))a=S(ϕ=i/612),θ=i*37+C(i/99+t),d=Math.hypot(X=S(θ)*a,Y=C(ϕ)+9,C(θ)*a+5)/4e3

Jan 15 2019 12:21 AM UTC

}// 136/140

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my #d3 #hypot #perspective #projection of a #sphere #model without any #distortion #correction

u/f8f82804

remix of d/11749

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f8f82804

remix of d/11754 by u/f8f82804

function u(t) {

for(c.width^=0,i=223;i--;x.lineTo(X/d+960,Y/d-960))d=Math.hypot(X=S(ϕ=i&1?2.7:.7)*S(θ=i*1.5-t/2),Y=C(ϕ)/.8+3,C(θ)*S(ϕ)+5)/3e3;x.stroke();

Jan 14 2019 6:40 PM UTC

}// 137/140

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#d3 #hyperbolic #tower #model in a #perspective #projection using #hypot

u/f8f82804

#hyperboloid
u/metamero

#moire
u/f8f82804

This dweet is still based on the spherical model it was remixed from, so all the points we generate are still on the surface of a sphere! The trick is judiciously connecting them with lines.
u/f8f82804

#fullhd

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f8f82804

remix of d/11753 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;x.lineTo(X/d+960,Y/d-960))d=Math.hypot(X=S(ϕ=i/612)*S(θ=i*95**.1-t/2),Y=C(ϕ)/.8+3,C(θ)*S(ϕ)+5)/3e3;x.stroke();

Jan 12 2019 12:17 AM UTC

}// 131/140

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building a #hyperbolic #surface by connecting points on a #sphere with lines, rendered with a #d3 #perspective #projection using #hypot

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f8f82804

remix of d/11689 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;x.fillRect(X/d+960,Y/d/.9-1150,s=47-d*2e4,s))a=S(ϕ=i/612),θ=i*37+C(i/99+t),d=Math.hypot(X=S(θ)*a,Y=C(ϕ)+3,C(θ)*a+5)/3e3

Jan 11 2019 8:11 PM UTC

}// 140/140

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#waves on a #perspectives #sphere -- #d3 #pointcloud

u/f8f82804

this dweet uses a better perspective transform based on Math.hypot -- #hypot
u/f8f82804

The projection still isn't perfect, because I'm rotating the sphere's axis towards the viewer by positioning it below the camera. The resulting distortion is approximately corrected by scaling the Y coordinate with /.9.
u/f8f82804

#perspective

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rnbw

function u(t) {

c.width^=0
x.fillStyle='#3ad3'
for(i=-1;i++<8;)x.fill(x.arc(960+S(t+i*.9)*500*(j=Math.min(i,1)),j*400+C(t+i*.9)*129*j+300,0,0,0))

Jan 7 2019 4:48 PM UTC

}// 129/140

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my first dweet of 2019 :D

Show more comments…
u/rnbw

(in which i learned heptagons are surprisingly efficient - tau/7 can be rounded and shortened to 2 characters!)
u/DataMeta

Very nice!
u/lionleaf

#diamond -looking
u/lionleaf

Clean and nice #gem
u/joeytwiddle

Nice! #model is how I tag 3d objects/shapes
u/f8f82804

#d3

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