Dwitter - javascript demos in 140 characters

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

Please log in (or register) to post a dweet (copy-paste the code somewhere safe to save it meanwhile)


    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

show FPS hide FPS share 1 remix fullscreen

taupelink

remix of d/24254 by u/taupelink

function u(t) {

for(i=q=400;i--;x.fillRect(720*X,720*Y,90*q/2**t,i/t))f=i*t,X=f*f%3,Y=X*f%2,x.fillStyle=R(q+=i/t**.5*S(i/X&q),q/=2+C(t/Y+X),q*=2*S(Y),i/q/t)

Nov 5 2021 12:27 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

d/24295

u/donbright

#waitforit
u/donbright

the final image is really cool, i love the colors and the contrast of the black monoliths
u/donbright

upside down it looks like a strange fire

show FPS hide FPS share fullscreen

magna

remix of d/24294 by u/magna

function u(t) {

e='🏀'
eval(unescape(escape`󨼮󭽩󩍴󪍼󟜰󒭷󪝴󪌨󮌩󩭯󬬨󩭩󫍬󥍥󮍴󚍥󛌹󛌱󝌩󛍤󟝧󩝴󢝭󨝧󩝄󨝴󨜨󜌬󜌬󜼲󛌱󞌩󛭤󨝴󨜬󭍲󨝮󬽦󫽲󫜨󪼽󠼨󭌩󚬹󛍺󟝓󚍴󚜪󝬹󛌭󮬬󪼬󞜶󜌬󪜽󝜴󜌩󞽩󛜭󞽦󪝬󫍒󩝣󭌨󪜥󜼲󛜱󝬬󪜯󜼲󛜹󛌱󛌱󚜩󩭩󫍬󤽴󮝬󩜽󤬨󛬮󛭤󛭳󫍩󨽥󚍯󟝩󚬴󛍯󚼴󚜩`.replace(/u../g,'')))

Nov 5 2021 3:03 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Bouncy pixellated basketball

u/magna

Couldn't golf it down enough to hide the emoji at the center (below the rendering)
u/magna

*pixelated
u/magna

uncompressed: c.width|=0 with(x)for(fillText(e,9,14),d=getImageData(0,0,32,18).data,transform(k=C(t)*9,z=S(t)*69,-z,k,960,i=540);i--;fillRect(i%32-16,i/32-9,1,1))fillStyle=R(...d.slice(o=i*4,o+4))

show FPS hide FPS share fullscreen

ciaccodavide

remix of d/24286 by u/ciaccodavide

function u(t) {

!t&&x.fillRect(0,0,2e3,2e3)
r=Math.random
for(n=13;X=r()*2e3,a=r()-.5,n--;)for(i=2e3;i--;)x.clearRect(X+a*(i-540),i,.2*Math.abs(540-i),t<.1)

Nov 3 2021 3:46 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

fragments

u/taupelink

Cool! I see a 3-D effect
u/donbright

yeah its like a city with spotlights shining into the sky, mirrored in water,.... or maybe like a gigantic hallway with really shiny floors and white ceilings with spires coming down to the floor as support

show FPS hide FPS share 1 remix fullscreen

ciaccodavide

function u(t) {

!t&&x.fillRect(0,0,2e3,2e3)






















































for(i=540;i--;)x.clearRect((r=Math.random)()*1920,i*2,1,1)

Nov 3 2021 3:33 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/Xen

tricky lol, nice
u/donbright

amazing

show FPS hide FPS share fullscreen

magna

function u(t) {

R=540,Y=R-t*99
for(s=0,d=-1;s<=R*R-Y*Y;s+=d+=2);
X=d/2
x.fillRect(960-X,R+Y,X*2,1)

Nov 2 2021 10:36 PM UTC

}// 82/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#circlechallenge No trig, no direct square root: Just using the Pythagorean theorem + the fact that sums of odd numbers give perfect squares

u/Xen

very clever sir

show FPS hide FPS share fullscreen

magna

remix of d/24275 by u/magna

function u(t) {

c.width=f=99
c.style.filter='sepia('
for(a=f*f;a--;x.fillRect(i=a%f,j=a/f|0,.7,Math.hypot(X=i/f-.5,Y=j/f-.3)-.2+S(k*X)*S(k*Y)*S(t)))k=f*t

Nov 2 2021 4:30 AM UTC

}// 137/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

show FPS hide FPS share 1 remix fullscreen

magna

function u(t) {

c.width|=0;x.fillText('👽',10,14);x.scale(60,60)
for(i=576;i--;x.fillRect(i&31,i>>5,1,1))x.fillStyle=R(0,x.getImageData(0,0,32,18).data[i*4])

Nov 4 2021 9:39 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Pixellated emoji renderer. Change value of e.

u/magna

Oof that title. Remix fail.

show FPS hide FPS share fullscreen

ArthurThuczsec

remix of d/24289 by u/ciaccodavide

function u(t) {

eval(unescape(escape`𘑴𙠦𚁤👛𦀽𦐽𨐽𭠽𞐹𧐬𫱮𪱥𮑤𫱷𫠽𩐽🡤𦱥𛡫𩑹𠱯𩁥𛑳𧐽𜐬𫱮𪱥𮑵𬀽𩐽🡤𦱥𛡫𩑹𠱯𩁥𛑳𧐽𜀩𛁸𦱦🐧𩡩𫁬𤡥𨱴𙱝𚁘𚰽𭠪𠰨𨐫🐨𩁛𜡝𯀭𩁛𜁝𚐯𞐩𛁙𚰽𭠪𤰨𨐩𛁳🐳𝰬𬰬𭠽𞐬𮀮𩡩𫁬𤱴𮑬𩐽𙰣𙰫𚁘𧡙𯀰𚐩`.replace(/u../g,'')))

Nov 4 2021 6:45 PM UTC

}// 126/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

golf and remix

show FPS hide FPS share fullscreen

donbright

function u(t) {

限=199
for(m=-限;m<限;m+=(2+t))for(n=-限;n<限;n+=(3+t)){
g=2*m*n
b=m*m+n*n
r=m*m-n*n
x.fillRect(1920/2+frame*g/b,1080/2+frame*r/b,1,1)}

Nov 2 2021 3:12 PM UTC

}// 130/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

As part of #circlechallenge I go back to the old rational parametrization of the circle from Wildberger's "chromogeometry", which has elements of Euclid. Each frame draws rational points on a circle, and each frame the radius gets bigger. All of the patterns are a kind of optical illusion.

u/donbright

changing '2' and '3' to different numbers will give different patterns

show FPS hide FPS share fullscreen

cantelope

function u(t) {

x.fillRect(960+((b=t?b:[0,h=520,h/22.7,0])[0]+=b[2]),h+(b[1]+=b[3]),9,9,b[2]-=b[0]/h,b[3]-=b[1]/h)

Nov 2 2021 12:30 PM UTC

}// 98/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#circlechallenge (no sine/cosine)

u/donbright

does fillrect have 6 parameters here?
u/cantelope

heh. it only looks at the first 4. i'm not actually saving any space by including 6 parameters, but why not? :)
u/cantelope

can you see how this circle method works? there is an array with 4 elements, the first 2 being positions (x,y), and the last 2 being analogous to a vector (in physics) with magnitude and direction, or simply (velocity-x, velocity-y). The velocity vector is added to the position coordinates once per frame and is itself adjusted in a way to create a perfectly circular "orbit" about the origin. Interestingly, this approach can be extended into 3 or more dimensions, and involve, obviously, more than 2 bodies. 3-body orbital chaos can be very interesting and beautiful, e.g. https://code.dweet.net/full/2w8z