Dweets awesomed by u/rodrigo.siqueira

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: #Food

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rodrigo.siqueira

remix of d/23439 by u/rodrigo.siqueira

function u(t) {

for(Y=t/9-1,i=2e3;i--;x.fillRect(i,60*t,1,1))r=((X=i/540-1.8)*X+Y*Y)/99,x.fillStyle=`hsl(${K=T(Y/r|X/r)/9+Math.random()*9},5%,${300-K/r}%`

Aug 15 2021 6:18 PM UTC

}// 138/140

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Sierpinski vortex #sierpinski

u/danny@hille.dk

Looks pretty dope

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taupelink

remix of d/23379 by u/taupelink

function u(t) {

for(i=q=k=720;--i;x.fillRect(k*X,k/Y,-q*q/3**t,-p*p/3**t))f=i*t,X=f*f%3,Y=X*f%1,x.fillStyle=R(q%=S(X+q%Y)*i,q*=1+S(p=5e4/q)*Y,q/=Y**.5,p/q)

Aug 15 2021 3:39 PM UTC

}// 139/140

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d/23559

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mxfh

remix of d/23551 by u/mxfh

function u(t) {

I=new ImageData(w=2048,w)
b=new Int32Array(I.data.buffer)
for(i=3e6;i--;b[i]=(i-Y&Y+i)*-t/i%i<<22)Y=i*w
x.putImageData(I,0,0)

Aug 15 2021 2:06 AM UTC

}// 125/140

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https://www.dwitter.net/d/23557 so with some space for setting up other buffer view, it speeds things up when treating rgba Uint8Clamped Array as single 32bit value

u/mxfh

wondering if we could store that buffer somwhere to do truly iterative fractal stuff
u/taupelink

trippy!

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𫐽𜀻𚰫𫐼𝰸𞰩𤀽𭀿𦰮𛠮𤀬𦰹𝀰𛀵𜀰𛁓𚁰🐨𫐭𭀥𞐩𚠪𜠩𛁃𚁰𚐬𜁝𧐺𦱝𞱐𛡭𨑰𚁶🐾𮀮𩡩𫁬𤡥𨱴𚁶𦰰𧐫👶𦰲𧐯🐮𞐵𛁶𦰱𧐫👶𦰳𧐯🐮𞐵𛁭𛁭𛁸𛡦𪑬𫁓𭁹𫁥👠𪁳𫁡𚀤𮱰𚠪𜰯𜱥𝰪𚁶𦰴𧐫𚰩𯐬𞐰𙐬𝐰𙐬𛠰𜑠𚐩𛁐👐𛡦𪑬𭁥𬠨𭠽🡶𦰴𧐼𫐩`.replace(/u../g,'')))

Aug 14 2021 4:13 PM UTC

}// 140/140

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u/danny@hille.dk

i like it, althoug it makes my brain hurt
u/cantelope

that's just weakness leaving the body
u/cantelope

:D
u/cantelope

added music (remix of aurora) https://code.whitehotrobot.com/d/2w9g
u/cantelope

(temp mirror for above link) https://code.dweet.net/d/2w9g

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rodrigo.siqueira

remix of d/23546 by u/rodrigo.siqueira

function u(t) {

for(c.width=w=429,d=new ImageData(w,w),m=w*w,i=-1;m--;d.data[i+=4]=Y**S(t*1))Y=(m%w&m/w/2-t*40)*(50+(t+i*3)**2*m%w)
x.putImageData(d,0,0)

Aug 13 2021 3:09 PM UTC

}// 137/140

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#Sierpinski transition effect

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mxfh

remix of d/23417 by u/mxfh

function u(t) {

for(d=new ImageData(w=2048,w),m=3e6;m--;d.data[m*4-1]=(m-Y&Y+m)*t/w&w)Y=m*w
x.putImageData(d,0,0)

Aug 13 2021 11:51 AM UTC

}// 97/140

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u/mxfh

for(d=new ImageData(w=2048,w),m=1e7;m--;d.data[m|3]=(m-Y&Y+m)*t/w&w)Y=m*w x.putImageData(d,0,0)
u/mxfh

for(d=new ImageData(w=2048,w),m=1e7;m--;d.data[m|3]=(m-Y&Y+m)*t/w&w)Y=m*w x.putImageData(d,0,0)
u/mxfh

-2 but considerably slower

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tomxor

remix of d/23544 by u/pavel

function u(t) {

for(a=Math.abs,c.width&=i=4352;X=1-(T+i/32)%2,Y=--i/2e3;x.fillRect(X*r+64*T,Y*r+96-64*a(S(t)),T=a(2-t%4)+1,(i^i/64)/8&1))r=64/(--Y*Y+X*X+1)

Aug 13 2021 12:57 AM UTC

}// 139/140

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Smoother #Amiga #Ball

Show more comments…
u/tomxor

..But less authentic. Remaps the pixel positions rather than texture, which gives "free" antialiasing, with spare space to correct the spin.
u/pavel

Oh yeah, nice. This is definitely a better way of doing it. The other mapping has an incorrect center that I have to waste characters to correct.
u/pavel

-2 char using S(t%3.14) to bounce and inlining the single Math.abs call
u/danny@hille.dk

What a clever trick, using modulus pi of t, to only get the positive part of the sinus curve
u/danny@hille.dk

3.2 works fine, while 3 and 3.1 looks wrong
u/danny@hille.dk

test code: c.width|=0,x.fillRect(o=860,o-S(t*4%3.2)*o,200,200)

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danny@hille.dk

remix of d/23547 by u/danny@hille.dk

function u(t) {

c.width=w=180;for(m=2e4;m--;x.fillRect(i,j,2,z))i=m%w,j=m/w,X=i/90-1,Y=j/90-.6,r=X*X+Y*Y,d=r*9*(2+S(t*9)),z=S(X/d*9-9*C(t))*C(Y/d*9-7*S(t))

Aug 12 2021 6:12 PM UTC

}// 139/140

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Silly remix

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danny@hille.dk

function u(t) {

c.width=w=180;for(m=2e4;m--;x.fillRect(i,j,1,z))i=m%w,j=m/w,X=i/44-2,Y=j/44-1.1,r=X*X+Y*Y,d=r>1?1:C(r)*2,z=S(X/d*9-t*C(t)*5)*C(Y/d*9-t*S(t))

Aug 12 2021 5:55 PM UTC

}// 140/140

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moar ballz

u/cantelope

too much ballz
u/danny@hille.dk

Try not to think of it as too much ballz, try to think of it as too little fire, then you will realize there are no ballz...

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rodrigo.siqueira

remix of d/23528 by u/rodrigo.siqueira

function u(t) {

for(c.width=w=482,d=new ImageData(w,w),m=w*w,i=3;m--;d.data[i+=4]=Y*w&7e8)X=m-t*9e4,Y=m%w&X/w-S(m%w/99+t*3)*w/8
x.putImageData(d,0,0)

Aug 12 2021 1:52 PM UTC

}// 133/140

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#Sierpinski waves

u/danny@hille.dk

Love it: - idk why, but it reminds me of the old windows logo https://logodix.com/logo/661924.png

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