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/12001 by u/thorbear

function u(t) {

if(t<3){A=Z=a=b=t;s=99
for(i=9e3;--i;)x.fillStyle=R(9*b**2),x.fillRect(960+a*s,540+b*s,.6,.7),
a=2*S(b)*3-C(A*2)*3,
b=S(a+A*2)*3+C(b*2),A=a}

Jun 17 2019 1:03 PM UTC

}// 140/140

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Bat flight - Variations on Clifford Pickover's Attractor #attractor

u/rodrigo.siqueira

Symmetric #pickover attractor

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rodrigo.siqueira

function u(t) {

Y=0
for(i=-100;i<100;i++) {
 x_diff = i/200;
 Y += 3*(x_diff ** 2) // 𝔂 = 𝔁³ ⟹ 𝔂' = 3*𝔁²
 x.fillRect(960+i*5,800-Y*10,5,5)
}

Jun 11 2019 12:15 AM UTC

}// 124/140

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Iterative numerical method to calculate 𝔂 = 𝔁³ using its derivative 𝔂' = 3*𝔁²

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rodrigo.siqueira

function u(t) {

Y2=X2=X=0
Y=S(t)
for(i=3e3;i--;){
N=(P=X*X+Y*Y)*S(3/(P)**0.5)
X2+=-Y+X*N+S(i)
Y2+=X+Y*N
X=X2/4
Y=Y2/8
x.fillRect(960+X*1e3,540+Y*1e3,1,.3)
}

Jun 10 2019 8:09 PM UTC

}// 140/140

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I was trying to create this: https://imgur.com/gallery/jpAn7tX but something very wrong happened. The equations in the page seem simple, if anyone wants to try...

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rodrigo.siqueira

remix of d/14489 by u/rodrigo.siqueira

function u(t) {

if(t<20){p=S(t)*99,q=p*9
for(i=5e3;i--;){P=p
p+=C(4*(q+p))/5,q+=P
q%=π=Math.PI,p%=π
x.fillStyle=R(i/25,t,p*20)
x.fillRect(q*695,p*400,1,1)}}

Jun 7 2019 9:57 PM UTC

}// 140/140

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Poincaré's dream

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rodrigo.siqueira

remix of d/14081 by u/rodrigo.siqueira

function u(t) {

c.width|=0
for(var w=960,i=1e4;i--;){var
X=S(i+t/3),
Y=S(k=i*i)-2*T(t/4%1.4)+1,
Z=S(k*~(t/5.6-5))-4
x.fillRect(w+w*X/Z+80*C(t)*Z,w*Y/Z,4,4)}

May 23 2019 3:45 PM UTC

}// 140/140

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Falling 3D objjects #d3

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rodrigo.siqueira

remix of d/14045 by u/rodrigo.siqueira

function u(t) {

if(t==0)for(w=960,i=6e4;i--;){k=.5
Y=S(i)/2
H=Math.cosh(Y/k)
X=k*H*C(u=3.2*S(i/832))
Z=k*H*S(u)-1.8
x.fillRect(w+w*X/Z,w*Y/Z+500,s=4/Z/Z,s)}

May 21 2019 6:41 PM UTC

}// 140/140

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Catenoid is the surface formed by the revolution of a catenary. It is a Minimal Surface. Soap film attached to twin circular rings will take the shape of a catenoid.

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rodrigo.siqueira

function u(t) {

p=t*629
r=420-t*140
X=S(p)*r
Y=-C(p)*r
x.lineTo(X+940,Y+540)
x.stroke()

May 18 2019 9:41 PM UTC

}// 71/140

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Rotating triangles

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rodrigo.siqueira

remix of d/13700 by u/rodrigo.siqueira

function u(t) {

if(t<7)for(w=i=960;i--;x.fillRect(w+w*X/Z,w*Y/Z+540,s=18/Z/Z,s))
X=(S(V=t*i))*S(U=i*i*V)*3,
Y=(C(U))*S(V+.4)*2.6-.2,
Z=S(Y+X)-5.4

May 9 2019 7:31 PM UTC

}// 129/140

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Pebble

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rodrigo.siqueira

remix of d/13699 by u/rodrigo.siqueira

function u(t) {

if(t<9)for(w=i=960;i--;x.fillRect(w+w*X/Z,w*Y/Z+540,s=18/Z/Z,s))
Y=(S(V=t*i))*S(U=i*i*V)*2.5+.2,
X=(.1+S(V/2))*S(V*1)*3,
Z=S(X/Y+X/2-11)-5.4

May 9 2019 7:19 PM UTC

}// 140/140

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Butterfly

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rodrigo.siqueira

remix of d/13693 by u/rodrigo.siqueira

function u(t) {

if(t<9)for(w=960,i=960;i--;x.fillRect(w+w*X/Z,w*Y/Z+540,s=18/Z/Z,s))
X=(.2-S(V=i*t))*S(U=V*i*i)*3.5-.7,
Y=(.1+C(V-U))*S(V+U)*2,
Z=S(U)-5

May 9 2019 7:08 PM UTC

}// 136/140

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