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

Please log in (or register) to post a dweet (copy-paste the code somewhere safe to save it meanwhile)


    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

show FPS hide FPS share fullscreen

rodrigo.siqueira

remix of d/17953 by u/tomxor

function u(t) {

c.width=-1;for(i=2e3;m=i&1,v=(K=t%2)<1?25:K%1*99**1.1,p=i%3*3,i--;)x.fillRect(150+p*S(P=i**.7)+v*C(V=i**.5+t),78+p*C(P)+v*S(V)*C(!p*i),1,1)

Mar 16 2020 11:30 AM UTC

}// 139/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Blowing The Enemy #coronavirus

Show more comments…
u/WorldMerge

This is really cool! Does setting the canvas width to -1 make it full-width?
u/rodrigo.siqueira

c.width=-1 is a trick I saw here (probably from u/pavel) that makes width=300 pixels. I used throw(c.width) to see "300". So it's a compact form to create a medium-low resolution image.
u/tomxor

300px is the default canvas width. What's particularly odd is that while setting negative numbers causes default value, everything else that ordinarily coerces to NaN will result in 0. e.g throw Number({}).toString() // NaN c.width={}; throw c.width.toString() // 0
u/tomxor

I guess in c++ land width has outofrange=300 and NaN=0
u/katkip

looks good
u/katkip

but dangerous

show FPS hide FPS share 1 remix fullscreen

rodrigo.siqueira

remix of d/17937 by u/tomxor

function u(t) {

c.style.filter=`blur(2vh)contrast(6e2%)`
for(c.width=128*5,i=6e3;i--;)x.fillStyle=R(50),x.fillRect(5*(i&127),i>>4,5,(i**3>>6)/(6+t/6e4)&9)

Mar 13 2020 2:17 PM UTC

}// 138/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#blood #cell #coronavirus attack

u/katkip

scary
u/tomxor

😱
u/aleamb

wow!!

show FPS hide FPS share 1 remix fullscreen

rodrigo.siqueira

remix of d/17386 by u/rodrigo.siqueira

function u(t) {

for(A=a=b=0,i=1e4*(t<8);i--;x.fillRect(a*1650-2130,b*1950+99,.3,1))r=0|2*Math.random(),a+=r/1.5-a/5+b*S(a*1.5)/1.5,b+=C(A*1.5)/3+.34-b/4,A=a

Feb 21 2020 12:46 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Plants in my garden. #growth #plant #nature #tree #fractal

u/KilledByAPixel

🌱

show FPS hide FPS share 3 remixes fullscreen

rodrigo.siqueira

remix of d/13119 by u/rodrigo.siqueira

function u(t) {

c.width+=X=Y=Z=d=.04
for(i=6e3;i--;)X+=-d*(Y+Z),
Y+=d*(X+.2*Y),
Z+=d*(.2+Z*(X-5)),
x.lineTo(980+80*(X*C(t)-Y*S(t)),800-Z*48+Y*19)
x.stroke()

Jan 12 2020 12:43 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Turning Rössler Strange Attractor, a system of three non-linear ordinary differential equations with chaotic dynamics and fractal properties. Some people see this turning clockwise, some see counterclockwise due to the bistable optical illusion (search "Spinning Dancer" for explanation). #attractor #illusion

u/rodrigo.siqueira

The rotation effect trick X*C(t)-Y*S(t) was "borrowed" by Frank Force KilledByAPixel's #Lorenz Attractor: from https://www.dwitter.net/d/14752

show FPS hide FPS share fullscreen

rodrigo.siqueira

remix of d/15632 by u/rodrigo.siqueira

function u(t) {

if(t<20)for(i=d=e=f=5e3;i--;x.fillRect(d*z-500,e*z,1,1))[d,e,f]=[(r=Math.random(z=99)*z|3)/5-3/(.2+r%3)*(-30/d)*2,.8*r%15-119*.5/C(d)/d/f,d]

Sep 8 2019 5:01 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Decomposition of geometric waves

show FPS hide FPS share 1 remix fullscreen

rodrigo.siqueira

function u(t) {

c.width|=0
for(i=4e3,w=960;i--;x.fillRect(w+w*X/Z,w*Y/Z,s=90/Z/Z,s))
X=C(t/5)*C(V=i+t)*3+C(U=i**6),
Y=C(U+t*2)*T(U+t)-2,
Z=S(V)-4+S(t)

May 17 2019 2:24 PM UTC

}// 134/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Swarm around the #torus

show FPS hide FPS share 2 remixes fullscreen

rodrigo.siqueira

remix of d/13644 by u/rodrigo.siqueira

function u(t) {

c.width|=0
for(i=4e3,w=960;i--;x.fillRect(w+w*X/Z,w*Y/Z,s=20/Z/Z,s))X=C(s=i/200)*C(K=i/(10**-(~(t/3)%6))+t/3),Y=C(s)*S(K)-1,Z=S(i)*C(t)/2-2

May 6 2019 1:19 PM UTC

}// 139/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Demo of 3D objects #d3

u/iverjo

Nice!
u/iverjo

I like that it alternates between different 3D objects

show FPS hide FPS share 1 remix fullscreen

rodrigo.siqueira

remix of d/13601 by u/pavel

function u(t) {

c.width|=0
for(i=1e4,X=Y=Z=w=960;i--;x.fillRect(w+w*X/Z,w*Y/Z,s=40/Z/Z,s))a=i**4.8%6,X=X/2+S(a+t/3),Y=(a*S(t)/9)*X+Y/2+1,Z=1.6+Z/2+C(a+t/3)

May 3 2019 2:50 PM UTC

}// 139/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Sierpinski particles #sierpinski

show FPS hide FPS share 2 remixes fullscreen

rodrigo.siqueira

remix of d/13592 by u/rodrigo.siqueira

function u(t) {

x.beginPath(x.globalAlpha=.08)
if(t<188.5)for(i=9,j=.1,X=960,k=Y=550;k/=1.4,i--;j*=-6)X+=S(f=t*(j-.2)/3)*k,x.lineTo(X,Y-=C(f)*k);x.stroke()

May 2 2019 6:49 PM UTC

}// 139/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Echinoid 7-Symmetry - It needs to run for PI minutes (188.5 seconds) to complete.

u/Jezza

#worththewait
u/DataMeta

That is quite beautiful

show FPS hide FPS share 2 remixes fullscreen

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

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

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.

dwitter.net | rodrigo.siqueira (15555)