New #physics 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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Opposites

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pavel

function u(t) {

for(c.width|=i=99;S[u[t]=t]=x[t]=i--;x.fillRect(960+(u[i]+=S[i]-=u[i]/d),540+(x[i]+=C[i]-=x[i]/d),C[t++]=9,9))d=(u[i]**2+x[i]**2)**1.5/7e3

Feb 28 2019 5:17 AM UTC

}// 138/140

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#physics #orbit #orbits

u/pavel

Funky start due to lack of chars but quickly settles. Imagine a black hole in the middle.

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pavel

remix of d/12516 by u/pavel

function u(t) {

for(;t<9;)u[c[t]=t]=50*t++
for(c.width|=a=9;b=a--;u[b]-p<50&&(c[a]=c[b],c[b]=v))x.fillRect(960+(p=u[a]+=v=c[a]*=u[a]**2<8e5||-1),440,50,200)

Feb 26 2019 12:36 AM UTC

}// 140/140

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#default #physics #uncompressed

u/13thptr

cool
u/lionleaf

Amazing!
u/Ath0r

Very nice!
u/katkip

!!

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pavel

function u(t) {

eval(unescape(escape`𭀿𨰮𭱩𩁴𪁼🐰𞠨𭠽𦰮𛠮𩀽𙰰𜐲𜰴𝐶𝰸𞐧𧐬𬀽𦰮𛠮𩁝𚐻𩡯𬠨𨐠𪑮𘁰𚑻𩡯𬠨𨠽𨐻𨠭𛐻𚑰𦱢𧐾𬁛𨑝𛑁𙠦𚁰𦱢𧐽𬁛𨑝𛑁𛁛𭡛𨑝𛁶𦱢𧑝👛𭡛𨡝𛁶𦱡𧑝𚐻𮀮𩡩𫁬𤡥𨱴𚀹𝠰𚰨𬁛𨑝𚰽𭡛𨑝𚠽𬁛𨑝𚠪𜠼𝱥𝑼𯀭𜐩𛀵𜀰𛁁🐵𜀬𜠰𜀩𯐻`.replace(/u../g,'')))

Feb 24 2019 7:59 PM UTC

}// 134/140

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#default #physics #compressed

u/katkip

WOW
u/tehpsalmist

Underrated dweet right here.
u/Galaxtone

225/140
u/Galaxtone

Someone must of abused the ApI
u/f8f82804

u/Galaxtone: yes, this compression approach exploits a bug in dweet submission

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joeytwiddle

remix of d/11968 by u/joeytwiddle

function u(t) {

c.width|=0;o=t*7%15.7-22/7;j=o>0;w=(99-j*80-j*o*1.6)*S(!j*o+j*o*4);x.ellipse(920,850-j*600*S(o/4)-w,200-w,200+w,0,0,7);x.fill()

Jan 27 2019 5:54 AM UTC

}// 127/140

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New_Core's bouncing ball + squash = jumping jack

u/katkip

Nice
u/katkip

#physics #jelly
u/DataMeta

Delightful!
u/joeytwiddle

Change o*4 to o*3 for a slower wobble

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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

Show more comments…
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

function u(t) {

c.width*=1;for(i=9;i--;)for(j=6;j--;)
x.fillRect(500+i*100+C(t-j*j/160)*400,900-j*200,50,200)

Jan 19 2019 8:27 PM UTC

}// 93/140

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Some #physics inertia #default

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katkip

function u(t) {

t||(V=0,B=0,n=960,m=540);c.onmousemove=e=>{X=e.x*1.4,Y=e.y*1.4};n<X?V++:V--;m<Y?B++:B--;n+=V;m+=B;x.fillRect(n,m,10,10)

Jan 12 2019 11:31 AM UTC

}// 119/140

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!! before entering the canvas with the cursor, #fullscreen! It simulates quadratic gravity, not the Newtonian one! only 119 bytes, my own gravity system, inspired from u/metamero 's projects! There is no infinite velocity bug so the rectangle will not disappear so fast. If you have entered the canvas and you didn't fullscreen, reset the project by adding inoffensive changes to the script, then fullscreen. #interactive #physics #gravity

u/metamero

beautiful

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metamero

remix of d/11726 by u/metamero

function u(t) {

eval(unescape(escape`砮晩汬剥捴⡴㽭⬽瀫㵡⼽搽⡡⩡⽫⭢⩢⽫⤪⨱⸵㩱㵰㴲ⱴ㽮⬽焫㵢⽤㩭㵙㵘㵫㴹㘰ⱴ㼸㩮㴴㈬琿㠺測愽堭洬戽夭測派㈦洼㐴♮㹫♮㱫⬴㈿匽琺潮捬楣欽堿攽㹘㴨夽攮礪欪㈯楮湥牗楤瑨⤪攮砯攮示牥獥琩㭴桲潷⁓`.replace(/u(..)/g,"$1%")))

Jan 10 2019 9:55 PM UTC

}// 140/140

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now that is a #gravity #GAME !! click to set atractor : score=t is thrown when mover hits the 42px square : weird reset is click twice on left border aka X=0 (best on fullscren) : #orbit #physics #interactive

u/SockTaters

What a unique concept! I got 0.41666766666666666 after messing around for like 10 minutes

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metamero

remix of d/11726 by u/metamero

function u(t) {

t?x.lineTo(m+=p+=a/=d=((a*a+b*b)/k)**1.5,n+=q+=b/d,x.stroke()):k=(m=X=Y=640)*(n=p=q=3);onclick=e=>X=(Y=e.y*k/innerWidth)*e.x/e.y;a=X-m;b=Y-n

Jan 10 2019 4:07 PM UTC

}// 140/140

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#gravity #orbit #physics #interactive click to set atractor gravity ∝ 1/||r||**3

u/metamero

add ondblclick=reset for convenience

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metamero

function u(t) {

eval(unescape(escape`琿砮汩湥呯⡭⬽瀫㵡⼽搽⡡⩡⽫⭢⩢⽫⤪⨱⸵Ɱ⬽焫㵢⽤⤺⡭㵮㵘㵫㴹㘰ⱙ㴵㐰Ⱬ⨽焽㈬瀽㔮㤬潮捬楣欽攽㹸⹦楬汒散琨堽⡙㵫⽩湮敲坩摴栩⩥⹸ⱙ⨽攮礬㠬㠩Ɐ湤扬捬楣欽牥獥琩㭡㵘⵭Ɫ㵙⵮ⱸ⹳瑲潫攨⤻`.replace(/u(..)/g,"$1%")))

Jan 10 2019 2:09 PM UTC

}// 139/140

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now correct #gravity formula : #orbit #physics #interactive : click to set atractor : double click to reset

u/metamero

all of my previous #orbit dweets are not #gravity , please refer to this version for the right formula (gravity ∝ 1/||r||**3)

dwitter.net | #physics