Dweets awesomed by u/chunnoo

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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Current theme challenge: #Opposites

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mxfh

remix of d/849 by u/mxfh

function u(t) {

r=480;c.width=r*4;λ=0;for(φ=a=Math.PI/2;φ>-a;φ-=1/r){λ+=a;x.lineTo(C(φ)*S(λ-t)*r+2*r,(C(t=t+1/r)*S(φ)+S(t)*C(φ)*C(λ-t))*r+r)}x.stroke()

Feb 22 2017 1:25 PM UTC

}// 135/140

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Show more comments…
u/chrishaff

Old school cool!
u/ninerdelta

wow this is awesome
u/donbright

lovely
u/sfz

how in the
u/Drum

I've been clickcing 'awesome' on quite a few examples here, but this one is AWESOME!
u/Kalanchoe

Wow!
u/Brutal

Higher math :)
u/robvoodoo

If only you could fly the camera around!
u/Lazy1337

#d3

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New_Core

function u(t) {

x.fillStyle=R(b=2e3,b,b,0.1);x.fillRect(0,0,b,b);x.beginPath();for(i=b;i--;)x.lineTo(i/2*C(t)+i*S(g=t+i)+960,i/4*S(t)+i*C(g)+540);x.stroke()

Aug 21 2016 3:10 PM UTC

}// 140/140

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u/iverjo

Dat tunl!
u/New_Core

maybe its a spinning chinese hat from top
u/iverjo

You're right, I can trick my brain into beliving that. Funky! It's like one of those illutions where you see different things based on how you look at it/think of it
u/iverjo

*believing
u/iverjo

Dwitter really needs an "edit comment" feature :P
u/lionleaf

Wow!!
u/giel

Nice!
u/lionleaf

#rotation #hat #in_or_out #lighting
u/joeytwiddle

#shiny
u/vain

Wow! Very nice!

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iverjo

remix of d/183 by u/chunnoo

function u(t) {

t++;x.beginPath();r=128*t;w=960;h=540;p=24*Math.PI*t+t;q=p/60%t;x.moveTo(r*C(p-q)+w,r*S(p-q)+h);x.lineTo(r*C(p)+w,r*S(p)+h);x.stroke()

Jul 29 2016 5:14 PM UTC

}// 134/140

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iverjo

function u(t) {

for(i=7;i--;)x.fillStyle=R(a=255*!i,a,a,.02+i),r=S(t/7),x.fillRect(!a*(960+900*S(t+i)*r),!a*(515+500*C(t+i)*r),c=20+8*a,c)

Jul 29 2016 5:10 PM UTC

}// 122/140

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This might be a good starting point for creating dweets with rectangles that leave trails. For i = 0 a large, white, semi-transparent rectangle is applied to the entire canvas. For i = 1,2,3,4,5,6 small, black, opaque rectangles are drawn.

u/iverjo

#spiral

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3bl3gamer

function u(t) {

c.width=256;for(i=256;i--;)for(j=142;j--;x.fillRect(i,j,1,k/14))for(a=b=0,k=18;k--&&b*b<4;)q=a*a-b*b+i/96-2+C(t*2),b=2*a*b+j/96-1+S(t*2),a=q

Jul 29 2016 7:32 AM UTC

}// 140/140

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u/iverjo

Cool!
u/iverjo

135 characters: for(c.width=i=256;i--;)for(j=142;j--;x.fillRect(i,j,1,k/14))for(a=b=0,k=18;k--&&b*b<4;a=q)q=a*a-b*b+i/96-2+C(t*2),b=2*a*b+j/96-1+S(t*2)

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iverjo

function u(t) {

w=c.width=300;x.fillRect(0,87,w,3);x.font='49px A';for(i=7;i--;)x.fillText(String.fromCharCode(55357,56989-(i?0:27)),310-t%4*210+i*46,90)

Jul 22 2016 8:54 PM UTC

}// 137/140

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Choo choo

u/sigveseb

Looks very different on different platforms, but hella creative! Nice ^^
u/iverjo

Yeah, it seems that it works correctly only in FF, Opera and Chrome on Windows. Thanks :)
u/iverjo

#train

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iverjo

remix of d/286 by u/iverjo

function u(t) {

t=t%4;if(t<.1)r=X=Y=0,W=c.width=960,H=540;for(i=W*4;i--;)x.fillRect(X=(X+S(r+=.5-Math.random())%W+W)%W,Y=(Y+C(r)%H+H)%H,A=5/(1+t*9),A)

Jul 21 2016 1:21 PM UTC

}// 134/140

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u/sigveseb

almost looks like a map!
u/joeytwiddle

Whoa! When I was younger I used to have nightmares about this damn thing. I would clean it all away but then it would come creeping back. Weird that you found it in 2016!
u/iverjo

#random

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iverjo

remix of d/268 by u/nkedel

function u(t) {

if(!t)r=0,X=960,Y=540,W=1920,H=1080;x.fillRect(X+=5*S(r+=.5-Math.random()),Y+=5*C(r),5,5),X=((X%W)+W)%W,Y=((Y%H)+H)%H

Jul 21 2016 11:35 AM UTC

}// 117/140

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With wraparound

u/iverjo

#random

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iverjo

function u(t) {

c.width=500;x.translate(250,40);M=(1+S(t*2))/2;for(j=66;j--;)x.translate(9,0),x.rotate(M*.1+(1-M)*((j+6)%16?0:1.57)),x.lineTo(0,0),x.fill()

Jul 20 2016 11:31 PM UTC

}// 139/140

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#morhp

u/iverjo

I meant #morph

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nkedel

function u(t) {

if(t<1||sx>1920||sx<0||sy<0||sy>1080){r=0;sx=960;sy=540;c.width=1920};x.fillRect(sx+=5*S(r+=0.5-Math.random()),sy+=5*C(r),5,5)

Jul 20 2016 9:06 PM UTC

}// 126/140

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u/iverjo

It's mildly entertaining to watch how long the "worm" can keep going without hitting a "wall" :)
u/PhiLho

Also known as "drunk man path" or just "Brownian motion". :-D
u/iverjo

Here's a version with wraparound: http://dweet.dwitter.net/id/286?autoplay=1
u/iverjo

#random

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