Dweets awesomed by u/rodrigo.siqueira

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: #Food

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pavel

function u(t) {

for(c.width=i=1944,w=960;i--;x.fillRect(w+w*S(a)*S(b)/z,540+w*C(b)/z,s=13/z/z,s))j=i%72,z=2+C(a=2.7+S(t)+(j&4?0:j)/72)*S(b=1.5+(i/72|0)/120)

Apr 11 2019 6:03 AM UTC

}// 140/140

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#default on a sphere

u/f8f82804

#d3 #sphere #perspective
u/katkip

how lol
u/pavel

I draw #default one pixel at a time and treat (x,y) of the pixels as angles (a,b) in spherical coordinates. Spherical to 3d cartesian is x=r*sin(a)*sin(b), y=r*cos(a)*sin(b), z=r*cos(b). Projecting 3d to 2d cartesian is x'=x/(2+y/r), y'=z/(2+y/r), and scaling pixel size by 1/(2+y/r)**2 so stuff in the back is smaller.

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pavel

function u(t) {

for(c.width=i=960;--i;x.ellipse(480,270-56*(j%2-.5)*y,r=32*(64-y*y)**.5,r/2,0,a=(j+t%1)/7,a+!j*7))j=i>>4,y=i%16-8;x.stroke()

Apr 10 2019 8:35 AM UTC

}// 124/140

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#wireframe #sphere

u/f8f82804

#d3
u/Xen

Nice!
u/lionleaf

Nice one! #globe
u/pavel

I use 44 longitude lines so the arc angle between adjacent two is 2*pi/44 which is approximated by 1/7 to 4 decimal places.
u/pavel

Using the famous pi ~ 22/7 approximation.

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KilledByAPixel

function u(t) {

for(i=999;i--;)X=Y=Z=M=N=467,M-=i-N,Z*=N/M,X*=T(Y+Z),N^=~(X-i),Y*=T(X*-92),x.fillStyle=R(M,N,N,1),x.fillRect(876+.4*Y,650-.1*X,.06*Z,.06*Z)

Apr 10 2019 12:47 AM UTC

}// 139/140

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Current Best (1907 Bad / 145 Good) Im going to 2k bad

u/magna

Pretty!
u/joeytwiddle

Cloud city?
u/DataMeta

Mirror's Edge?

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rodrigo.siqueira

remix of d/12287 by u/rodrigo.siqueira

function u(t) {

c.width+=X=Y=Z=d=.05
for(i=7e3;i--;)
X+=-d*(Y+Z),
Y+=d*(X+.2*Y),
Z+=d*(.2+Z*(X-5)),
x.fillRect(950+X*55,930-Z*55+Y*C(X/9+t)*9,3,5)

Apr 9 2019 1:57 PM UTC

}// 130/140

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Rössler Strange Attractor - system with chaotic dynamics and fractal properties. #attractor #lorenz

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MudkipGuy

function u(t) {

eval(unescape(escape`琿挮睩摴栫㵩㴰㩥㵛⸮⹁牲慹⠵ㄸ㐩崮浡瀨弽㹍慴栮牡湤潭⠩⤻攽攮浡瀨樽㸨砮晩汬剥捴⡩┹㘪㈰Ȿ縨椯㤶⤪㈰ⰲ〬横㈰⤬⡛ㄬ㤵ⰹ㘬㤷崮浡瀨砽㹥孩⭸崫敛椭硝⤮牥摵捥⠨砬礩㴾砫礬〩籥孩⬫崩㴽㌩⤻`.replace(/u(..)/g,"$1%")))

Apr 8 2019 10:32 PM UTC

}// 137/140

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Game of Life Simulator

u/MudkipGuy

commented source: https://pastebin.com/pkuejiYp
u/MudkipGuy

#gameoflife
u/KilledByAPixel

👍

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rodrigo.siqueira

remix of d/12959 by u/rodrigo.siqueira

function u(t) {

x.fillRect(0,0,2e3,2e3)
for(var i=4e3;i=i-1;){
X=S(i)+S(K=i*.88)/2+2*S(F=2*i+t)
Y=C(i)+C(K)/2-2*C(F)
x.clearRect(960+X*130,550+Y*130,6,6)
}

Apr 6 2019 2:00 AM UTC

}// 139/140

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The Trefoil Knot. Created using a parametric equation from knot theory.

u/Qwitter

I like how the projected crossings allow you to view the height ambiguously: then, I can see this knot as not being knotted at whim.

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rodrigo.siqueira

remix of d/12968 by u/rodrigo.siqueira

function u(t) {

c.width+=0
for(var i=1e3;i=i-.25;){
var K=(i&2)-S(t)
var X=K*S(i)/2+S(40*i+t)
var Y=C(i)/2-C(40*i-t)*K
x.fillRect(960+X*180,520+Y*180,4,3)
}

Apr 4 2019 12:12 PM UTC

}// 140/140

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Two dancing torus. "var" is not needed, but performance (fps) is better with them.

u/username

But if you do not specify anything, it will be a var anyway?
u/yonatan

It'll be global, which means it can be accessed outside of the u() function, which kills some compiler optimizations

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username

remix of d/12959 by u/rodrigo.siqueira

function u(t) {

c.width+=0
t*=9
for(i=3e3;i--;){
 K=(i&2)-2*t*t/i
 X=S(i)*2+S(2*i)*K/(t/9)
 Y=C(i)*2-C(2*i)*K/(t/9)
 x.fillRect(960+X*150,640+Y*150,8,8)
}

Apr 4 2019 8:28 AM UTC

}// 138/140

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rodrigo.siqueira

remix of d/12959 by u/rodrigo.siqueira

function u(t) {

x.fillRect(0,0,2e3,2e3);
for(var i=1e3;i=i-.25;){
X=S(i)+S(t/2)*S(i*50)*4
Y=C(i)-C(i*50+t)*2
x.clearRect(960+X*150,540+Y*150,3,3)
}

Apr 3 2019 1:11 AM UTC

}// 131/140

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Torus using parametric equation. #torus

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rodrigo.siqueira

remix of d/12952 by u/rodrigo.siqueira

function u(t) {

c.width+=0
for(i=3e3;i--;){
 K=(i&2)-3*C(t)
 X=S(i)*2+S(2*i+t)*K
 Y=C(i)*2-C(2*i+t)*K
 x.fillRect(960+X*80,500+Y*80,5,5)
}

Apr 2 2019 11:54 AM UTC

}// 123/140

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Smooth transitions on the Trefoil endless knot

u/katkip

WOW

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