New #Sphere dweets

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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f8f82804

remix of d/11749 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;x.fillRect(X/d+960,Y/d-960,s=48-2e4*d,s))d=Math.hypot(X=S(ϕ=i/612)*S(θ=i*37+i**C(i+t)/i-t),Y=C(ϕ)/.8+3,C(θ)*S(ϕ)+5)/3e3

Jan 12 2019 12:03 AM UTC

}// 140/140

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#perspective #sphere #pointcloud #swarm #traffic #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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f8f82804

remix of d/11688 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;x.fillRect(960+800*S(θ)*S(ϕ)/Z,540+800*C(ϕ)/Z,s=18*(Z>2?.1:2.1-Z),s))ϕ=i/612,θ=i*37+(i/9)**C(i+t)/99-t/2,Z=C(θ)*S(ϕ)+2

Jan 7 2019 10:32 PM UTC

}// 139/140

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#perspective #sphere #pointcloud #swarm #traffic

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f8f82804

remix of d/11620 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;Z<1.6&&x.fillRect(960+800*S(θ)*S(ϕ)/Z,540+800*C(ϕ)/Z,s=32*(1.6-Z),s)){ϕ=i/600;θ=i*84+(i/9e3)**C(i+t)**2;Z=C(θ)*S(ϕ)+2;}

Jan 7 2019 6:37 PM UTC

}// 140/140

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patterns on a #perspective #sphere with #occlusion

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f8f82804

remix of d/9721 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;Z<1.6&&x.fillRect(960+800*X/Z,540+800*Y/Z,s=32*(1.6-Z),s)){ϕ=i/600;θ=i-t/5+ϕ*4.5;X=S(θ)*S(ϕ);Y=C(ϕ);Z=C(θ)*S(ϕ)+2;}

Jan 2 2019 7:32 PM UTC

}// 136/140

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#perspective #sphere #stripe

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pavel

remix of d/9174 by u/f8f82804

function u(t) {

with(x)for(N=i=300;A=S(a=i--/99);beginPath(fillStyle=`hsl(${i*N} 90% ${c**4}%`))c=A*S(b=t+i)+2,fill(arc(N*c,N*(A*C(b)/2-C(a)+2),70*A+9,0,7))

Nov 8 2018 11:00 PM UTC

}// 140/140

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u/katkip

I like the fact that it is so fast
u/iverjo

Nice! This reminds me of the spinning beachball of death (on Mac OS X)
u/aleamb

#colors #d3 #sphere
u/pavel

#uncompressed

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cantelope

function u(t) {

eval(unescape(escape`睩瑨⡸⥦潲⡦楬汒散琨〬〬挮睩摴栽⡷㴵㌰⤪㈬ㅥ㌩ⱳ瑲潫敓瑹汥㴧⌶晡✬椽㌲㭩ⴭ㭳瑲潫攨⤩景爨樽㌳㭪ⴭ㭬楮敔漨眫匨瀩⩓⡱⤯娪眬㈹㠫䌨焩⽚⩷⤩娽䌨瀽⡩㸱㘿樺椩⼵⸱⭴⼸⤪匨焽⡩㸱㘿椭ㄶ㩪⤯㔩ⴲ⸲`.replace(/u(..)/g,"$1%")))

Sep 15 2018 9:02 PM UTC

}// 140/140

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u/f8f82804

#wireframe #perspective #sphere
u/donbright

i really need to understand this escape stuff some day
u/cantelope

@donbright, https://www.dwitter.net/d/9207
u/joeytwiddle

Many Bothans died to bring us this dweet

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Quant1um

function u(t) {

c.width|=1
x.lineWidth=3
r=420
u=1.5
t=t/2
for(b=-u;b<u;b+=u/r)
x.lineTo(C(30*b)*C(b)*C(t)*r+S(b)*S(t)*r+960,S(30*b)*C(b)*r+540)
x.stroke()

Sep 12 2018 6:02 PM UTC

}// 139/140

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Spiral on sphere surface

u/f8f82804

#sphere
u/f8f82804

similar to d/683

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f8f82804

remix of d/9721 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;){
ϕ=i/3/(99+S(t));
X=S(i)*S(ϕ);
Y=C(ϕ);
Z=C(i)*S(ϕ)+2;
if(Z<1.6)x.fillRect(960+800*X/Z,540+800*Y/Z,s=32*(1.6-Z),s);
}

Sep 9 2018 9:35 PM UTC

}// 139/140

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#cell #sphere #animated #perspective

u/donbright

thats weird... like a fruit or something

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f8f82804

remix of d/9707 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;){
θ=i+t/9;
ϕ=i/600;
X=S(θ)*S(ϕ);
Y=C(ϕ);
Z=C(θ)*S(ϕ)+2;
if(Z<1.6)x.fillRect(960+800*X/Z,540+800*Y/Z,s=32*(1.6-Z),s);
}

Sep 9 2018 3:44 AM UTC

}// 140/140

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#readable #perspective #sphere #template #math

dwitter.net | #Sphere