Top #Tunnel dweets

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.

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rodrigo.siqueira

remix of d/19968 by u/rodrigo.siqueira

function u(t) {

for(i=146;x.beginPath(),i--;x.fillStyle=`hsl(${i*3} 90%${S(i*3+t*6)*99}%)`,x.fill())x.arc(960+C(t)*(k=(1.06)**i)*.8,540+S(t)*220,k,0,7)

Sep 17 2020 1:42 AM UTC

}// 135/140

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Tunnel effects #tunnel

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rodrigo.siqueira

remix of d/17426 by u/rodrigo.siqueira

function u(t) {

for(i=880;i--;x.fillStyle=R(Y/2.5-r/(350+S(t*2)*300),0,r/2000,.8))x.fillRect(X=S(r=i*i)*i*3+i*C(t*3)+900,Y=C(r)*i+390+S(t*2)*i/3,i,i)

Jan 31 2020 6:05 PM UTC

}// 133/140

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Underwater lava cave #perspective

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u/tomxor

I keep switching perception between cave and mountain top, it gets stuck on mountain top... i can't control it 😳
u/sigveseb

I don't see mountain top 🤔 how?!
u/tomxor

funny, i can't see anything else now... it;s like looking down from above a mountain peak. Maybe imagine you are looking down from a circling helicopter.
u/rodrigo.siqueira

This #illusion is called "bistable perception". When I posted it was looking like a cave, now it seems to keep changing between mountain top and cave. I prefer a cave.
u/sigveseb

yes, I see it now!
u/rodrigo.siqueira

#tunnel
u/joeytwiddle

To see the mountaintop, maybe look at the blue and imagine it is the floor or the sea, far away.

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Xen

remix of d/7535 by u/jylikangas

function u(t) {

with(x)for(c.width=W=350+C(t)*99,globalAlpha=.1,i=19;--i;fill(rect(X-z,70+z,z*2,9)))z=290/(i-t*9%1),arc(X=W/2+i*S(t),70,2*z,9,13)

Oct 22 2019 5:42 PM UTC

}// 129/140

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just a play about

u/Xen

#tunnel
u/joeytwiddle

Pretty nice! Golfed and smoothed.

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rodrigo.siqueira

remix of d/17433 by u/rodrigo.siqueira

function u(t) {

for(i=780;i--;x.fillStyle=R(i/2+Y,Y/2,Y/3))x.fillRect(X=S(r=i**5)*i+i*S(t*7)/5+945-i/2,(Y=C(r**2)*i)+400,Z=i,i)

May 8 2020 3:22 PM UTC

}// 111/140

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Perspective #cavern #d3 #tunnel

u/sigveseb

So cool colors on this one
u/KilledByAPixel

it looks 3d, trippy!

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KilledByAPixel

remix of d/15976 by u/KilledByAPixel

function u(t) {

for(k=i=1e3;--i;x.fillRect(k+S(j=i/k+t/4)*i+S(m=k*j^k)*(r=1e5/i),540+C(j)*i+(z=C(m)<0?C(m):.4)*r,s=6e4/i,s,x.fillStyle=R(++z*99+i*.7,i/3)));

May 5 2020 5:06 PM UTC

}// 140/140

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Lava #Cavern 🌋

u/KilledByAPixel

reposted to tweak the colors :)
u/joeytwiddle

#tunnel

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Agnes

function u(t) {

with(x)for(c.width|=j=200;j--;fill())beginPath(r=~~(j/20)),arc(960+r*50*S(a=.314*(j%20))+25*S(M=t*S(t+j/200)),540+50*r*C(a)+25*C(M),2*r,0,7)

Jul 23 2018 10:20 AM UTC

}// 140/140

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Gelatinous tunnel

u/Xen

Nice!
u/aleamb

Coool!!
u/recoder

Hypnotic!
u/fujimotos

#tunnel

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Xen

remix of d/205 by u/iverjo

function u(t) {

c.width=2e3;n=899;for(i=2;i<n;i+=2)s=2/(9.1-(t+i/29*C(t/4))%9),x.beginPath(),j=i*.69+t,x.lineWidth=s*s*4,x.arc(n,520,s*99,j,j+1),x.stroke()

Nov 14 2017 7:59 PM UTC

}// 139/140

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Give it 30 seconds ;-)

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rodrigo.siqueira

remix of d/27925 by u/KilledByAPixel

function u(t) {

c.width=355
for(i=w=127;i--;)for(j=200;j--;)x.fillRect(i+114,j,1,((w*(C(a=Math.atan2(X=i/w-.5,Y=j/w-.8))/Y/6+t)^w*(S(X+Y)/Y/6))&w)/w*C(a/t))

Jun 6 2023 3:16 PM UTC

}// 140/140

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The Tunnel #tunnel

u/tomxor

For some reason this reminds me of those weird halfpipe levels on sonic2 on the megadrive https://youtu.be/8cr1rqVcIhA?t=484

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aleamb

function u(t) {

M=Math;a=65025,c.width=w=255;v=w/2;for(;a--;)e=a&w,f=a/w,d=(7650/M.sqrt((s=e-v)*s+(z=f-v)*z)),g=M.atan2(f,e),d+t*99&f&&x.fillRect(e,f,1,1)

Jan 19 2018 1:33 PM UTC

}// 138/140

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My first dwitt. Sierpinski triangles on tunnel effect, more or less.

u/joeytwiddle

Reminds me of the black hole in Interstellar >.<
u/aleamb

#sierpinski #tunnel

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kchplr

remix of d/4751 by u/kchplr

function u(t) {

x.strokeRect(0,0,W=1912,H=1072)
x.rotate(C(t*26)/2977)
x.drawImage(c,4.6,4,W,H-2)
x.strokeStyle=`hsl(${50+t*9},70%,${52-C(t/2)*45}%)`

Dec 30 2017 6:15 PM UTC

}// 133/140

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u/joeytwiddle

#tunnel #colors
u/joeytwiddle

#hiddengem #waitforit
u/joeytwiddle

Rich colours in Chrome but not in Firefox

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