Dweets awesomed by u/hscells

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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Kyoushu

function u(t) {

x.clearRect(0,0,1920,1080);for(i=0;i<=800;i+=0.9){b=t+i*C(t/100);x.fillRect(S(b)*(960-i)+960,C(b)*(540-i)+540,10,10);}

Feb 1 2019 10:53 AM UTC

}// 118/140

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If you play with variables long enough, something cool will probably happen

u/katkip

True

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yokljo

remix of d/11997 by u/yokljo

function u(t) {

x.fillRect(0,0,2e3,2e3)
x.globalAlpha=.2
for(i=9*t+200;i>0;i-=.28)x.clearRect(C(t+i*3)*900+950,S((t/6+i)*5)*400+500+i/5,9,9)

Jan 30 2019 10:54 PM UTC

}// 124/140

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rodrigo.siqueira

remix of d/11965 by u/pavel

function u(t) {

for(x.fillRect(0,0,i=3e3,i);Q=S(--i*i);x.clearRect(960+150*(S(b)*4+S(i+t)*Q),540+150*(C(i*i)-(t%4>2?T(b+t):S(b+t))),4,4))b=i%6+t+(t%2>1?0:i)

Jan 28 2019 2:40 PM UTC

}// 140/140

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Torus, spheres, flow and bubbles

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u/rnbw

now THIS is a demo!
u/katkip

Yeah he win
u/13thptr

woah
u/joeytwiddle

Superb! Golf the end with i*(t%2>1) or i*!(t&1)
u/rodrigo.siqueira

Thanks @joeytwiddle for the golf trick. i*(t&1) also works and it's even shorter. And I found that t%4>2?... can be converted to t&2?... It works as a counter to change the function each 2 seconds.
u/yonatan

Also, since T and S take the same arguments (t%4>2?T(b+t):S(b+t)) can be (t&2?T:S)(b+t)
u/lionleaf

Wow! Now we're talking
u/vain

Wow, three fx in this tiny code? Great!

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firegodjr

remix of d/9768 by u/firegodjr

function u(t) {

x.font='3em x'
for(m=j=32;j--;)for(i=63;i--;)x.fillText('◢◣◤◥'[Math.random()*4|0],i*m,j*m),x.fillStyle=R(b=(t*m+(i^(t*m-j)))%99*2)

Jan 26 2019 8:01 PM UTC

}// 130/140

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Fractal Burn

u/joeytwiddle

Noisy triangles remind me of this: https://twitter.com/BalintCsala/status/99216…

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pavel

function u(t) {

t?c.width|=0:(i=A=240,j=B=80,p=q=-9)
x[f='fillRect'](i+=p=i<7*A?p:-p,840,A,A)
x[f](j+=q=j>0?q:-q,1e3,B,B)
j>i-B&&(j=i-B,p+=s=(q-p)/5,q-=s*9)

Jan 24 2019 10:56 PM UTC

}// 140/140

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Perfect elastic collision #physics #simulation

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u/pavel

Big block is 9x the weight of the little block
u/katkip

This is impressive. Idea from 3blue1brown?
u/iverjo

Wow!
u/bekfast2390

This is like ping-pong!
u/joeytwiddle

Some context: https://www.youtube.com/watch?v=HEfHFsfGXjs 3Blue1Brown
u/katkip

hi, PI
u/Undefined

A fellow 3b1b fan, I see :D
u/joeytwiddle

#3b1b
u/ivylab

I always wait until the big one gets way up to the left side and it goes bam bam bam bam bam :)

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katkip

remix of d/11892 by u/katkip

function u(t) {

c.width*=1;for(i=64;i--;)for(j=60;j--;)
x.fillRect(600+i*20-j*10,j*10+Math.abs(32-i-S(t*5)*9)*5+Math.abs(30-j+C(t*5)*9)*5,10,10)

Jan 19 2019 7:52 PM UTC

}// 128/140

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Resizing the roof! #d3

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katkip

remix of d/11885 by u/katkip

function u(t) {

seed=4
c.width*=1;for(i=43;i--;)for(j=71;j--;)
x.fillRect(j*30+S(i/seed+t)*100-100,i*30+C(j/seed+t)*100-100,30,30)

Jan 19 2019 6:50 PM UTC

}// 114/140

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It is going up. To go down, change seed=0.02

u/katkip

Haha, this got 20 likes
u/Xen

seed=5+C(t)*2
u/katkip

The perfect straight one is seed=.0123
u/katkip

44 likes om!
u/vain

Very cool and smooth looking fx

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katkip

remix of d/11867 by u/katkip

function u(t) {

eval(unescape(escape`昽⡘ⱙⱳ⤽㹻楦⡳㸴⥸⹦楬汓瑹汥㵒⠱㈸⭓⡳⭴⤪ㄲ㠬ㄲ㠫䌨猫琩⨱㈸ⰱ㈸⭃⡳⩳⤪ㄲ㠩ⱸ⹦楬汒散琨堭猯㈬夭猯㈬猬猩ⱦ⡘⵳ⱙⱳ⼲⤬昨堬夭猬猯㈩ⱦ⡘⭳ⱙⱳ⼲⤬昨堬夫猬猯㈩紻昨㤶〬㔴〬㜲〩`.replace(/u(..)/g,"$1%")))

Jan 17 2019 3:25 PM UTC

}// 135/140

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u/iverjo

How was this made?
u/13thptr

nice!
u/sigveseb

Ooh very pretty!
u/katkip

u/iverjo simple recursion
u/magna

This is so pretty!

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rnbw

function u(t) {

c.width^=0
x.fillStyle='#3ad3'
for(i=-1;i++<8;)x.fill(x.arc(960+S(t+i*.9)*500*(j=Math.min(i,1)),j*400+C(t+i*.9)*129*j+300,0,0,0))

Jan 7 2019 4:48 PM UTC

}// 129/140

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my first dweet of 2019 :D

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u/rnbw

(in which i learned heptagons are surprisingly efficient - tau/7 can be rounded and shortened to 2 characters!)
u/DataMeta

Very nice!
u/lionleaf

#diamond -looking
u/lionleaf

Clean and nice #gem
u/joeytwiddle

Nice! #model is how I tag 3d objects/shapes
u/f8f82804

#d3

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DataMeta

function u(t) {

c.width|=i=768;x.transform(1,0,0,1,960,540)
for(i;i--;x.rotate(t/64))x.fillRect(i,i,i/8,i)

Sep 9 2018 4:12 AM UTC

}// 90/140

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u/katkip

idk why but this was satisfying
u/f8f82804

#waitforit
u/rep_movsd

Hypnotic

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