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.

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tomxor

function u(t) {

c.width=99;x.fillRect(X+=a=S(X/30)<0?-a:a,Y+=b=Y>52?-b:b+.3,4,4)}{X=b=Y=a=1

Oct 26 2019 2:20 PM UTC

}// 75/140

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75byte #physics

u/tomxor

Perfect collision integration, since uniform gravity is constant it should cancel out in such a simple case, in which case integration can be skipped on a collision interval ?-b:b+.3 this is why it doesn't loose or gain significant hight on average
u/tomxor

To make it absolutely perfect this can also be changed to ?-b:b+.25 which will eliminate integration error since .25 is a non periodic binary fraction... it will bounce forever :)
u/tomxor

... but that would cost an extra byte so its no good !

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mildlybean

function u(t) {

for(i=a=c.width|=0;i--;x.fillRect(i,i^X?F(i):Y,9,15))t?F=f=>S(f/99+t)*66+999:X=Y=v=b=0;Y+=++v;if(Y>F(X=(X+a+b)%a))Y=F(X),v=-v,b+=C(X/99+t)*9

Sep 7 2019 6:56 PM UTC

}// 140/140

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Gravity on a curved, moving surface

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u/KilledByAPixel

👍
u/atgz

very impressive
u/metamero

nice!! #gravity #physics
u/0x04

Nice to see that you cracked the 140 char mark! 👌
u/joeytwiddle

Like a roulette simulator! Can you guess where it will stop?
u/katkip

I consider this a life form
u/iverjo

Impressive for a dweet!

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katkip

function u(t) {

eval(unescape(escape`𭁼𯀨𦀽𜠶𜀬𦐽𜠴𜀬𥠽𭠽𜐰𚐻𩡯𬠨𨰮𭱩𩁴𪁼👩🐰𞱩𚰫🀹𞐻𚑸𛡦𪑬𫁓𭁹𫁥👒𚀰𛁩𚠳𚐬𮀮𨡥𩱩𫡐𨑴𪀨𚐬𮀮𨑲𨰨𦀭𪐪𠰨𬠽𭀪𥠯𞐩𛁙𛑩𚡓𚁲𚐬𜠰𜀭𪐪𜠬𜀬𝰩𛁸𛡦𪑬𫀨𚐊𦀫👖𞱙𚰽𭠻𭠫🐮𝐻𪑦𚁙🠸𞀰𚑶𚠽𛐮𝠬𦐭🐹𞱩𩠨𦀾𜐷𜠰𚑖𚠽𛐮𞐬𦀭🐹`.replace(/uD./g,'')))

Aug 6 2019 9:56 AM UTC

}// 140/140

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Bouncing #sphere #shades #lighting #realistic #bounce #ball #physics

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KilledByAPixel

remix of d/13326 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`猽挮獴祬攻献扡捫杲潵湤䉬敮摍潤攽❳捲敥渧㭦潲⡢㵛椽㤹崻椭ⴻ扛楝㵠牡摩慬ⵧ牡摩敮琨⑻匨椪椩⨲⬲⸵絥洠慴․笵〫ㄵ⩓⡱⥽┤筙紥Ⱔ筒⠲㔵ⱙⱙ⼷ⱙ⼴㤭⸳⥽Ⱓ〰〩怩夽㐸⬲㘪䌨焽椫琩㭳⹢慣歧牯畮搽戻`.replace(/u(..)/g,"$1%")))

Jul 17 2019 6:58 PM UTC

}// 140/140

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#blackhole ~ Tribute to the first image produced of a black hole.

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u/donbright

#astronomy #physics
u/rodrigo.siqueira

You did (better) in 140 characters what scientists did in 5 petabytes (5000000000000000 bytes) of data, enough to create about 36 trillion of dweets.
u/KilledByAPixel

Psssh. Those scientists need to learn javascript.
u/metamero

I very much wanted to do this tribute when it came out, but I couldn't and know I'm happily contemplated by this =]
u/iverjo

Impressive!
u/katkip

Awesome!
u/Leodude123

Coooooool!!

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katkip

function u(t) {

t||(z=Y=Z=y=0)
x.fillRect(960+Z*10,540+Y*10,10,10);Z+=z;Y+=y;z+=C(t*t)/99,y+=Math.abs(S(t*t)/40);if(Y>54)y*=-1;if(Z>90||Z<-90)z*=-1

Jun 9 2019 11:56 AM UTC

}// 131/140

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Chaotic pattern created by wind #chaos #bounce #physics

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metamero

remix of d/11726 by u/metamero

function u(t) {

eval(unescape(escape`𭀿𮀮𫁩𫡥𥁯𚁭𚰽𫐾𪱼𯁭🀱🱰🐭𬀺𬀫👡𛰽𩀽𚁡𚡡𛱫𚱢𚡢𛱫𚐪𚠱𛠵𛁮𚰽𫠾𜐰𝰹𯁼𫠼𜐿𬐽𛑱𞡱𚰽𨠯𩀩𞠨𪰽𫐽𦀽𦐽𝠳𞐬𪰪👮👱🐳𛁰🐶𛁯𫡭𫱵𬱥𫑯𭡥👥🐾𦀽𩐮𮀪𚁙👥𛡹𚡫𛱩𫡮𩑲𥱩𩁴𪀩𛱥𛡹𛁯𫡣𫁩𨱫👲𩑳𩑴𚐻𨐽𦀭𫐬𨠽𦐭𫠬𮀮𬱴𬡯𪱥𚀩`.replace(/u../g,'')))

Jun 6 2019 6:38 PM UTC

}// 139/140

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#gravity in a bouncing universe : #orbit #physics #interactive : move mouse to set atractor : click to reset

u/katkip

Wow
u/DataMeta

Fun!

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pavel

remix of d/14376 by u/pavel

function u(t) {

t?x.arc(w=960,h=540,h,0,c.width|=0):X=Y=1e3
X*X+Y*Y>2.4e5&&(r=C(t*t)*8+12,U=-X/r,V=-Y/r)
X+=U;Y+=++V;x.arc(w+X,h+Y,5*r,0,7);x.fill`evenodd`

Jun 6 2019 5:00 AM UTC

}// 139/140

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#physics #bounce updated so ball size reflects speed

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KilledByAPixel

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪁼🐰𞱸𛡦𪑬𫁒𩑣𭀨𜀬𥰽𜑥𜰬𭰽𜱥𜰬𭰩𞱦𫱲𚁩🐹𞐻𪐭𛐻𮀮𩡩𫁬𚁰👮𩑷𘁐𨑴𪀲𡀨𦠽𦐼𜀿𬠫𦐺𬠩𛁰𛡥𫁬𪑰𬱥𚀨𪐪𞐹𚱴𚠨𝐹𞐫𤰨𪐪𪐩𚠪𜠪𥰩𚐥𭰭𬠬𥰭𦐭𬠬𜠪𬠭𦠬𦠬𜀬𜀬𝰩𚐩𬠽𪐬𪀽𚀲𚱩𚡷𙐹𚐪𞐹𛁙👨𚠨𤰨𥰪𭀯𪀫𪐩𚠪𜠩𚠪𛠵𛑲𛰳`.replace(/u../g,'')))

Jun 4 2019 6:13 AM UTC

}// 140/140

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Bouncing Balls

u/SMON

They deform when bouncing! ❤️
u/katkip

Realistic
u/katkip

#bouncy #physics
u/KilledByAPixel

#bounce

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pavel

remix of d/14376 by u/pavel

function u(t) {

eval(unescape(escape`瑼簨瀽焽刽㌵〬堽夽爽猽㔩㭐㵰ⵘ㭑㵱ⵙ㭐⩐⭑⩑㸱攵☦⡕㵐⼱㔬嘽儯ㄵ⤻砮慲挨瀫㵲⨽瀾㵒♰㰱㔷ぼ簭ㄬ焫㵳⨽焾㵒♱㰷㌰籼ⴱⱒⰰⱣ⹷楤瑨簽〩㭸⹡牣⡘⬽唬夫㴫⭖ⰳ㔬〬㜩㭸⹦楬池敶敮潤摠`.replace(/u(..)/g,"$1%")))

Jun 2 2019 7:17 AM UTC

}// 134/140

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#physics #bounce #compressed

u/pavel

172 t||(p=q=R=350,X=Y=r=s=5);P=p-X;Q=q-Y;P*P+Q*Q>1e5&&(U=P/15,V=Q/15);x.arc(p+=r*=p>=R&p<1570||-1,q+=s*=q>=R&q<730||-1,R,0,c.width|=0);x.arc(X+=U,Y+=++V,35,0,7);x.fill`evenodd`
u/DataMeta

Would be very cool to see the ball decoupled from the container's reference frame. Could it fit within a compressed dweet?
u/pavel

it is decoupled
u/DataMeta

Somehow missed that. Awesome.

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pavel

remix of d/10076 by u/yonatan

function u(t) {

t?X*X+Y*Y>2.4e5&&(v=C(t*t)/42-.07,U=v*X,V=v*Y):U=V=Y=X=3
X+=U;Y+=++V
x.arc(w=960,h=540,h,0,c.width|=0);x.arc(w+X,h+Y,40,0,7)
x.fill`evenodd`

Jun 2 2019 12:27 AM UTC

}// 140/140

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#physics #bounce

u/pavel

The velocity of the bounce changes on every hit, otherwise the ball would settle on a simple pattern

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