Top dweets 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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rodrigo.siqueira

remix of d/17400 by u/Xen

function u(t) {

for(i=1e3;i--;x.fillStyle=R(Y+Z,Y,X,.1))t<3&&x.fillRect(X=C(z=S(t*i**8)*7+4)*i**1.5,Y=300+S(z/2)*i*t,Z=399*S(t),Z),x.strokeRect(X,Y,Z,Z)

Jan 29 2020 9:48 PM UTC

}// 136/140

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Sunrise palette of 180000 squares. #colors #art

u/Xen

nice

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rodrigo.siqueira

remix of d/17337 by u/rodrigo.siqueira

function u(t) {

x.font=`${1.85*S(i=t)}in'`
for(k in x)p=P=>255*S(i/P),x.fillStyle=R(p(1)+180,p(.1),p(.2),.02),x.fillText(k,S(i++)*2-9,t*14*i*C(i)+600)

Jan 23 2020 12:31 AM UTC

}// 135/140

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CompositeOperation SmoothingEnabled

u/katkip

#trick

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rodrigo.siqueira

remix of d/17068 by u/pavel

function u(t) {

x.globalAlpha=.08
for(i=8;i--;x.stroke())x.beginPath(r=150*2/3*(i>1)),x.arc(960+t*r*C(a=i+t/5),540+t*t*r*S(a)/25,t*200*(i?1/3:1),0,7)

Jan 5 2020 4:22 AM UTC

}// 133/140

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Turning and folding

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rodrigo.siqueira

remix of d/15732 by u/KilledByAPixel

function u(t) {

for(j=15;j--;)for(Z=i=96;i--;x.fillStyle=`hsl(${i-t*99} 60%${j*3+Y/11}%`,x.fillRect(X,Y,9*j*S(t),35))X=i*20,Y=T(X+t)*600

Sep 19 2019 10:26 PM UTC

}// 120/140

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Raining Rainbow

u/KilledByAPixel

👍

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rodrigo.siqueira

function u(t) {

D=(a,b)=>{L=a.length,i=r=0,R='';while(i<53){d=i<L?~~(a[i]):0,R+=(i==L?".":"")+~~((K=d+(r*10))/b),r=K%b,i++}throw(a+"/"+b+"="+R)};D("1",9998)

May 30 2019 5:23 PM UTC

}// 140/140

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BigFloat in 140 chars! This is the Long Division Algorithm used here to calculate 1/9998. Note that this simple division results in Powers of Two: 0001, 0002, 0004, 0008, 0016, 0032, 0064.... Try to change 9998 for 9997 and you will see Powers of Three (1, 3, 9, 27, 81...). Guess what 9996 does? D is the division function. (a,b) are (numerator, denominator). 53 is precision (number of digits). Add more "9" to fit larger power numbers. E.g. To see powers up to 2**40 (that is 1099511627776), change denominator from 9998 to 9999999999998 and total number of digits from 53 to 534.

u/rodrigo.siqueira

I have discovered a truly remarkable demonstration of this result, but this comment is too small to contain.
u/joeytwiddle

#math #division
u/marc8

quoting Fermat... LOL

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rodrigo.siqueira

function u(t) {

if(t<1)for(i=5;i>1;i--)x.fillStyle=R(205*(I=i-1),51*I,29*I),x.fillRect(962-i*103,815-i*158*t,d=t*i*205,d)

May 15 2019 1:42 PM UTC

}// 105/140

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Homage to the Square: Glow, Josef Albers, 1966. From the Hirshhorn’s collection. Bauhaus #art

u/rodrigo.siqueira

This artwork was used in a US Postage Stamp (1980) with the inscription "Learning never ends".
u/taupelink

#bauhaus

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rodrigo.siqueira

remix of d/13611 by u/rodrigo.siqueira

function u(t) {

c.width|=0
for(i=2e3,w=960;i--;x.fillRect(w+w*X/Z,w*Y/Z,s=40/Z/Z,s))
X=4+C(i/50-t)/2-t%9,
Y=S(i/50-t)/2+1,
Z=(i%29)/9+1

May 5 2019 10:07 PM UTC

}// 119/140

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Rolling cylinder using Cantelope-Pavel's 3D engine. #D3

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rodrigo.siqueira

remix of d/13594 by u/robbyg

function u(t) {

c.width|=v=500
x.fillRect(0,0,W=2e3,W)
with(x)fillStyle='#fe0',moveTo(h=t*v%W,v),clearRect(v+h/1.4,v,80,30),fill(arc(h,v,99,a=S(t*9)**2,-a))

May 2 2019 7:12 PM UTC

}// 140/140

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Pac-man eating a pellet (pac-dot) #pacman

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rodrigo.siqueira

remix of d/13488 by u/pavel

function u(t) {

for(x.fillRect(0,0,i=640,i);z=--i**.3;x.fillStyle=R(0,500/--z))x.setTransform(s=20/z,0,0,s,0,0),x.fillText(i!=1?''[1]:' 😱',i%z*99,t++%z*60)

Apr 27 2019 1:39 AM UTC

}// 139/140

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😱 undefined

u/joeytwiddle

The #matrix on a bad day

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rodrigo.siqueira

remix of d/13442 by u/Jezza

function u(t) {

t||x.translate(960,540);if(t<8){
x.globalAlpha=.1
x.strokeRect(0,0,45,90)
x.rotate(Math.PI*5/3)
x.drawImage(c,70,0,1100,1000)
}

Apr 25 2019 1:43 PM UTC

}// 127/140

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Emergence of the star symbol

u/Jezza

Awesome!

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