Top dweets by u/donbright

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: #Opposites

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donbright

remix of d/2544 by u/New_Core

function u(t) {

for(j=15;j--;){for(i=0;i<50;i++){x.beginPath();x.arc(i*(40+j*9),(99-j*5)*S(t*j*.5+i)+300+j*60,99,0,7);x.fillStyle=R(9,0,j*12,.12);x.fill()}}

Apr 21 2017 10:48 PM UTC

}// 140/140

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whale's world, not ours

u/joeytwiddle

Wow!!

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donbright

remix of d/2298 by u/keithclark

function u(t) {

for(a=c.width^=0;d=C(--a+t)*S(b=a/t/t),e=T(a+t)*S(b);x.fillRect(d*h+960,C(b)*h+540,i=h/40-5,i))h=900/(2-e),x.fillStyle=R(a,h/a,(h/b)%256);

Mar 26 2017 1:25 AM UTC

}// 139/140

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this dweet is dedicated to Lynda Obst, a producer of Interstellar

u/tapgiles

Would love to see a slowed-down version of this...
u/donbright

unfortunately i dont understand it enough to make an easy slowdown! divding t by a number is not enough

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donbright

remix of d/1491 by u/SpecialAgent

function u(t) {

t?c.width=w:w=512,h=w*9/16,d=x.createImageData(w,h)
for(X=0;X<w;X++)for(Y=0;Y<h;Y++)d.data[(X+Y*w)*4+3]=(X^Y+X&Y)%256
x.putImageData(d,0,0)

Feb 28 2017 1:40 AM UTC

}// 140/140

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a nice clean and simple Sierpinski gasket using XOR + AND

u/donbright

you can increase w to get a bigger pic but it becomes slow

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donbright

remix of d/2281 by u/thespite

function u(t) {

c.width=w=1920,h=1080;d=.5;for(X=-d;X<d;X+=.02)for(Y=-d;Y<d;Y+=.02){
Z=t*C(t*t*X*Y);x.fillStyle=R(Z*w);x.fillRect(X*w+1e3,Y*h+540-Z*t,40,9)}

Mar 26 2017 12:53 AM UTC

}// 140/140

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donbright

remix of d/1857 by u/donbright

function u(t) {

w=128,c.width=2*w;for(i=w;i--;)for(j=w;j--;)c=S(t/3)*i*i+S(t/4)*j*j+S(t/5)*2*i*j,c=(c%w+w)%w,x.fillStyle=R(c,c,c),x.fillRect(64+i,8+j,1,1)

Mar 4 2017 8:07 AM UTC

}// 139/140

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As with 1857 this is an attempt to show the relation between Binary Quadratic Forms and the Circles and Squares pseudo fractal and Moiré pattern. This takes the basic ingredients of the Quadratic Form, x*x, y*y, and 2*x*y, and mixes them together, but slowly varies the amount of each ingredient over time with the Sine function. It is possible to see how all variations of the Quadratic Form result in similar patterns, transitioning from crcles to ovals to hyperbola patterns. Inspiration from this site and NJ Wildberger's rational geometr, Paul Bourke's http://paulbourke.net/fractals/circlesquares/ and Santiago Zubeta

u/donbright

https://twitter.com/zubie7a
u/SpecialAgent

wow! fascinating and purty :)

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donbright

remix of d/479 by u/lionleaf

function u(t) {

c.width=256;for(i=128;i--;)for(j=128;j--;){r=i*i-j*j;g=2*i*j;b=i*i+j*j;x.fillStyle=R(Math.abs(t*r)%256,0,0);x.fillRect(64+i,8+j,1,1)}

Feb 22 2017 4:06 AM UTC

}// 133/140

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Circles and Squares style pseudo fractal inspired by "red quadrance" from Wildberger's chromogeometry (x*x-y*y)

u/chrishaff

moire ole

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donbright

function u(t) {

c.width=1920;for(i=0;i<900;i+=25)for(j=0;j<900;j+=25){x.moveTo(900-j,0);x.lineTo(i+t*5,i);}x.stroke()

Feb 22 2017 1:59 AM UTC

}// 101/140

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donbright

function u(t) {

c.width=199
for(i=199;i--;)for(j=99;j--;){
b=i*i+j*j
r=i*i-j*j
g=2*i*j
n=frame
x.fillStyle=R(r*r%n,g*g%n,b*b%n)
x.fillRect( i,j, 1,1)
}

Jul 10 2019 11:44 PM UTC

}// 135/140

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mosaic of time

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donbright

remix of d/10243 by u/cantelope

function u(t) {

for(c.width^=з=0,M=[ф=1,п=ф];з++-12;){
M.push(п+=M[з-ф])
for(A=6.3;A>0;A-=(t+.1)/M[з])
x.fillRect(1e3+39*з*C(A),500+39*з*S(A),7,7)
}

Oct 5 2018 4:43 AM UTC

}// 132/140

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fibboclock?

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donbright

remix of d/2333 by u/Jenky

function u(t) {

r=Math.random
t?(p=s[d%2]+=(d/2<1?4:-4),s[d%2]=p>800?0:p<0?800:p,x.fillRect(...s,8,8),d=((~~(C(t)*4)))%4):(s=[96,96],d=0)

Mar 31 2017 2:07 AM UTC

}// 121/140

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based on Jenky's brilliant drawing program in dwitter, i removed the human element and substituted cosine. I like the simple pattern it makes and the way it slowly, hesitantigly draws it. The squares don't overlap for several minutes. Thanks @Jenky

u/cantelope

seems like you could remove r=Math.random :3
u/donbright

lol oops
u/alien

wow

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