Dweets awesomed by u/PotatoImaginator

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/17426 by u/rodrigo.siqueira

function u(t) {

for(i=880;i--;x.fillStyle=R(Y/2.5-r/(350+S(t*2)*300),0,r/2000,.8))x.fillRect(X=S(r=i*i)*i*3+i*C(t*3)+900,Y=C(r)*i+390+S(t*2)*i/3,i,i)

Jan 31 2020 6:05 PM UTC

}// 133/140

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Underwater lava cave #perspective

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u/tomxor

I keep switching perception between cave and mountain top, it gets stuck on mountain top... i can't control it 😳
u/sigveseb

I don't see mountain top 🤔 how?!
u/tomxor

funny, i can't see anything else now... it;s like looking down from above a mountain peak. Maybe imagine you are looking down from a circling helicopter.
u/rodrigo.siqueira

This #illusion is called "bistable perception". When I posted it was looking like a cave, now it seems to keep changing between mountain top and cave. I prefer a cave.
u/sigveseb

yes, I see it now!
u/rodrigo.siqueira

#tunnel
u/joeytwiddle

To see the mountaintop, maybe look at the blue and imagine it is the floor or the sea, far away.

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KilledByAPixel

remix of d/15354 by u/KilledByAPixel

function u(t) {

for(w=i=125;i--;)for(j=0;j<8;x.fillRect(i*20,j++?w*j+299*C((t*j*j+i/j|0)**3)/j:0,20,3e3))x.fillStyle=`hsl(${j**4-149} ${j*7}%${29*C(j)+39}%`

Jan 27 2020 1:44 AM UTC

}// 140/140

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City Outskirts

u/tomxor

Nice, you got the colours just right, I couldn't quite figure that bit out. #city
u/pavel

Just a black screen on Safari
u/KilledByAPixel

fixing up the hsl to have commas and closing paren may fix some browsers
u/tomxor

Safari is wrong, they should this dweet as a unit test :)

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rodrigo.siqueira

remix of d/17175 by u/pavel

function u(t) {

for(i=c.width|=p=1.571;i--;x[i&5?'arc':'moveTo'](960,540,2e3/z,b=p*((i>>3)+S(i*p)/1.5-.4+z/.3),b))z=1+(i>>5)+C(i*p-t/8);x.fill()

Jan 13 2020 5:09 PM UTC

}// 128/140

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Spiral interferences

u/rodrigo.siqueira

#spiral broken glass

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veubeke

remix of d/17174 by u/veubeke

function u(t) {

i=t*60|0,X=i%64,Y=i>>6,Y<19&&x.fillRect(48*X,1024+448*(X>7&X<32)-56*Y,Y%8>5&&X>2&X<5|X>34&X<37||Y>17&X+1>>1|Y<13&X>16&X<23?0:X+Y&1?48:40,48)

Jan 12 2020 9:03 PM UTC

}// 140/140

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Building a #castle

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rodrigo.siqueira

remix of d/13119 by u/rodrigo.siqueira

function u(t) {

c.width+=X=Y=Z=d=.04
for(i=6e3;i--;)X+=-d*(Y+Z),
Y+=d*(X+.2*Y),
Z+=d*(.2+Z*(X-5)),
x.lineTo(980+80*(X*C(t)-Y*S(t)),800-Z*48+Y*19)
x.stroke()

Jan 12 2020 12:43 AM UTC

}// 140/140

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Turning Rössler Strange Attractor, a system of three non-linear ordinary differential equations with chaotic dynamics and fractal properties. Some people see this turning clockwise, some see counterclockwise due to the bistable optical illusion (search "Spinning Dancer" for explanation). #attractor #illusion

u/rodrigo.siqueira

The rotation effect trick X*C(t)-Y*S(t) was "borrowed" by Frank Force KilledByAPixel's #Lorenz Attractor: from https://www.dwitter.net/d/14752

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pavel

remix of d/17103 by u/pavel

function u(t) {

h=n=>n&&x.isPointInPath(X+R*C(n),Y+R*S(n))|h(n-1)
R<169&&!h(99)?x.arc(X,Y,R,0,7,x.moveTo(X+R,Y,R+=8)):(X=t%20*96,Y=X**5%1080,R=2)
x.stroke()

Jan 10 2020 3:32 AM UTC

}// 140/140

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isPointInPath

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KilledByAPixel

remix of d/17100 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁔🐹𝠰𛁴𯁼𭁲𨑮𬱬𨑴𩐨𥀬𝐴𜀩𞱔𛐭𞱲𩑳𭁯𬡥𚁦𪑬𫁒𩑣𭀨𪠪𤰨𪠫𭀩𛁪𚡓𚁪𚡪𚱴𚐬𪠬𪠩𚐩𬱡𭡥𚁳𨱡𫁥𚀱𛀭𜐩𚐬𬡯𭁡𭁥𚀨𥀫𥀥𜠩𚠮𜰹𜠷𚐬𨱬𪑰𚁮𩑷𘁐𨑴𪀲𡀨𙱭𜀠𜁶𜡥𜱨𜡥𜰧𚐩𛁦𪑬𫁓𭁹𫁥👠𪁳𫀨𙁻𪠽𚁔🠾𝀩𚠱𞑽𘀹𞐥𝐰𙑠`.replace(/u../g,'')))

Jan 8 2020 5:07 AM UTC

}// 140/140

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Kaleidoscope #6

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cem

remix of d/16972 by u/yonatan

function u(t) {

c.width*=1;x.font='17cm"';x.fillText('🤓',650,800);x.font='2cm"';for(j=99;j--;)x.fillText('🍔',930+700*C(j+t/8),600+S(t+C(t+t/9+j-t)-j)*300)

Dec 26 2019 1:17 PM UTC

}// 138/140

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Hello Dwitter

u/Xen

Ayup dude...

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pavel

remix of d/16972 by u/yonatan

function u(t) {

for(i=n=c.width|=0;--i;x.fillRect(960+C(i/9)*y+S(3*t)*y-(k||((i&2)-1)*(2+i%7)*y),540-y,2*k||y/7,k/42||i%9*y))y=3/((i+27*t)/n%1-1),k=i%2*y

Dec 26 2019 1:34 AM UTC

}// 137/140

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u/ivylab

I don't even ... this is so cool, like a forest
u/pavel

This thing ((i&2)-1)*(2+i%7) takes so many characters. If somebody can figure out a shorter way to generate random-ish positive and negative numbers that aren't too close to zero that would be awesome. 7*C(i) is almost perfect but gets close to zero so you'd have trees on the path.
u/pavel

Oh! 3/C(i) works well here, but has no bound which will be an issue in other contexts.
u/KilledByAPixel

👍
u/iverjo

Random Forest!

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mildlybean

function u(t) {

for(r=X=c.width+=0;X-=2;t?T[X]>r?[T[X-1],T[X]]=[T[X],r]:0:T[X]=Math.random()*999)x.fillStyle=`hsl(${r/4},99%,45%`,x.fillRect(X,0,1,r=T[X++])

Dec 20 2019 12:38 AM UTC

}// 140/140

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Bubble Sort

u/Odog8

duuuude
u/pavel

#sort has a few others
u/katkip

awesome #math
u/katkip

#visualization #graph

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