New #bounce 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: #ScaryMovies

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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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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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katkip

remix of d/14138 by u/katkip

function u(t) {

c.width*=1;t||(X=80,Y=40,v=20,V=8);x.fillStyle=R(V*9);x.fillRect(X,Y,99,99);X+=v,Y+=V;V++;if(Y>989)V*=-.9;if(X>1831||X<0)v*=-.9;v*=1.001;

May 24 2019 2:28 PM UTC

}// 137/140

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#physics #collision #hitbox #rect #bounce #bouncy #velocity #gravity #simulation #math

u/katkip

Less friction

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katkip

function u(t) {

eval(unescape(escape`挮睩摴株㴱㭦㴨堬夬朩㴾筸⹴牡湳污瑥⡘ⱙ⤬砮牯瑡瑥⡧⤬砮瑲慮獬慴攨ⵘⰭ天紻景爨椽㤻椭ⴻ⥸⹦楬汒散琨㐰〫椪㄰〫匨琩⨳〰ⰴ〰ⰵ〬㈰〩ⱦ⠴〰⭩⨱〰⭓⡴⤪㌰〬㐰〬䌨琪㤫椯㈩⼨㤫琪琪㤩⤻`.replace(/u(..)/g,"$1%")))

May 16 2019 1:49 PM UTC

}// 135/140

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c.width*=1;f=(X,Y,g)=>{x.translate(X,Y),x.rotate(g),x.translate(-X,-Y)};for(i=9;i--;)x.fillRect(400+i*100+S(t)*300,400,50,200),f(400+i*100+S(t)*300,400,C(t*9+i/2)/(9+t*t*9))

u/katkip

#default #coil #bounce #physics

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katkip

function u(t) {

eval(unescape(escape`爽䵡瑨⹲慮摯活挮睩摴株㴱㭩昨ⅴ⥻焽孝㭦潲⡩㴳㤻椭ⴻ⥱⹰畳栨孩⨵〭爨⤪㈵ⰵ㤰ⰱ崩素景爨椠潦ⁱ⥸⹦楬汒散琨楛そ⬽⡲⠩⴮㔩⩩嬲崬⡩嬱崼㄰㈰㽩嬲崫㵲⠩㩩嬲崪㴭⸷Ⱪ嬱崫㵩嬲崩ⰵ〬㔰⤻`.replace(/u(..)/g,"$1%")))

May 15 2019 1:01 PM UTC

}// 134/140

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#default #collision #physics #fall #gravity #velocity #bounce #bouncy

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katkip

function u(t) {

eval(unescape(escape`挮睩摴株㴱㭩昨琥㠼⸲⥻焽孝㭦潲⡩㴹㭩ⴭ㬩焮灵獨⡛㐰〫椪㄰〬㐰〬ㅝ⥽⁦潲⡩⁯映焩砮晩汬剥捴⡩嬰崬⡩嬱崼㠸〿楛㉝⬽䵡瑨⹲慮摯洨⤺楛㉝⨽⴮㤬楛ㅝ⬽楛㉝⤬㔰ⰲ〰⤻`.replace(/u(..)/g,"$1%")))

May 15 2019 12:53 PM UTC

}// 125/140

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Gravity #default #collision #physics #fall #gravity #velocity

u/katkip

not golfed c.width*=1;if(t%8<.2){q=[];for(i=9;i--;)q.push([400+i*100,400,1])} for(i of q)x.fillRect(i[0],(i[1]<880?i[2]+=Math.random():i[2]*=-.9,i[1]+=i[2]),50,200);
u/katkip

#bounce #bouncy

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KilledByAPixel

function u(t) {

f=(s,w)=>(m=(S(i*s/1e3)*199+99)*t%w,m>w/2?w-m:m)
for(i=1e3;--i;)x.fillStyle=`hsla(${i},99%,${f(4,99)}%)`,x.fillRect(f(2,3831),f(5,2151),9,9)

Apr 15 2019 4:24 AM UTC

}// 140/140

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1000 squares #bounce for you.

u/Xen

it gets better the longer you leave it ;)
u/KilledByAPixel

It does descend into chaos eventually but it takes a while.

dwitter.net | #bounce