Hot dweets by u/joe.m

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: #ScaryMovies

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joe.m

function u(t) {

w=540;p=.0175;n=[6,2],d=[71,29]
if(!t)k=i=0
if(k>600)c.width|=k=0,i++
z=p*d[i%2]*k++
r=S(n[i%2]*z)*w
x.lineTo(w+r*S(z),w+r*C(z))
x.stroke()

Oct 3 2019 8:26 PM UTC

}// 139/140

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not quite a maurer #rose

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joe.m

remix of d/15861 by u/joe.m

function u(t) {

if(!t){for(i=n=2601;i--;u[i]=1)q=1;j=q*q}
if(u[q-1]&j<n){u[j-1]=0;x.fillRect(37*((j-1)%51),21*((j-1)/51|0),35,19);j+=q}else{q++;j=q*q}

Oct 1 2019 8:51 AM UTC

}// 134/140

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pavel, this one is for you #prime #sieve

u/pavel

nice 👍
u/username

#waitforit

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joe.m

remix of d/15836 by u/joe.m

function u(t) {

t?0:q=j=4900,d=[-1,99,1,-99]
x.globalCompositeOperation='xor'
j+=u[q]?-1:1
u[q]^=1
q+=d[j%4]%9801
x.fillRect(19*(q/99|0),10*(q%99),18,8)

Sep 28 2019 2:08 PM UTC

}// 136/140

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langton's ant. Chaos becomes order after about 10k iterations, wait for it...

u/joe.m

#emergent #automata
u/KilledByAPixel

Welcome to the #ant club!
u/Xen

nice!

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joe.m

remix of d/15836 by u/joe.m

function u(t) {

if(!t){for(i=n=2601;i--;u[i]=1)q=2;j=q*q}
if(u[q-1]&j<n){u[j-1]=0;x.fillRect(37*((j-1)%51),21*((j-1)/51|0),35,19);j+=q}else{q++;j=q*q}

Sep 30 2019 6:18 PM UTC

}// 134/140

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what's left is #prime

u/joe.m

#eratosthenes #sieve
u/joe.m

#slow_render
u/pavel

false, 1 is not prime :)

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joe.m

remix of d/15836 by u/joe.m

function u(t) {

if(!t){s=[4900]}
q=s.shift()%9801
if(!u[q])s.push(q-1,q+1,q+99,q-99)
u[q]=1
x.fillRect(19*(q/99|0),10*(q%99),17,8)

Sep 29 2019 7:27 PM UTC

}// 114/140

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flood fill 2, twice as fast and twenty three bytes shorter

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joe.m

function u(t) {

w=1920
f=12.57/w
t?0:y=[]
j=t*120+1
for(i=0;i<w;i++)
{
if(!t)y[i]=0
y[i]+=S(i*f*j)/j
x.fillRect(i, 520+400*y[i], 1, 1);
}

Sep 27 2019 2:59 PM UTC

}// 121/140

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ooh, you can keep state!

u/tomxor

#fourier
u/tomxor

Welcome to Dwitter! you can also use u instead of y to save the initialisation space, as you can use functions for their object properties.

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joe.m

function u(t) {

w=1920
c.width=w
f=6.28/w
for(i=0;i<w;i++)
{y=0
for(j=1;j<=Math.abs(((20*t)%40)-20);j+=2) y+=S(i*f*j)/j
x.fillRect(i, 520+520*y, 10, 10);}

Sep 27 2019 1:09 PM UTC

}// 138/140

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sum of even harmonics

u/tomxor

#fourier

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joe.m

remix of d/15835 by u/joe.m

function u(t) {

if(!t){s=[60]}
q=s.shift()%121
if(!u[q])s.push(q-1,q+1,q+11,q-11)
u[q]=1
for(i=121;i--;)if(u[i])x.fillRect(174*(i/11|0),98*(i%11),172,96)

Sep 28 2019 9:53 AM UTC

}// 137/140

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flood fill

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joe.m

function u(t) {

c.width=1920
for(i=121;i--;)u[i]=Math.random()>0.5
for(i=121;i--;)if(u[i])x.fillRect(174*(i/11|0),98*(i%11),172,96)

Sep 28 2019 8:23 AM UTC

}// 115/140

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building blocks... #random

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