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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joe.m

function u(t) {

w=540;p=.0175;n=[6,2],d=[71,29]
if(!t)k=i=0
if(k>600)c.width|=k=0,i++
z=p*d[i%2]*k++
r=S(n[i%2]*z)*w
x.lineTo(w+r*S(z),w+r*C(z))
x.stroke()

Oct 3 2019 8:26 PM UTC

}// 139/140

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not quite a maurer #rose

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asteriskman

function u(t) {

c.width|=0
x.font='8em"'
p=i=>S(i*3)*99+99
x[f='fillText']('👹',a=p(t),99)
x.fillRect(a+85,99,5,600)
x[f]('🍬',a,750)
x[f]('🙄',p(t-.3),999)

Oct 3 2019 11:43 AM UTC

}// 137/140

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Inktober Day 3 - Bait

u/taupelink

ha!
u/Xen

love it

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afs

function u(t) {

d=t<1.8&&-t*200*t;x.strokeRect(400+(S(t)*(-600+C(t)))*-3,200+(C(t/6)*(50+C(t)*1000+S(t)*30))*.2,d*20,d*20);x.rotate(t*t*t/50)

Oct 3 2019 9:49 AM UTC

}// 125/140

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joeytwiddle

remix of d/9574 by u/katkip

function u(t) {

for(i=0;i<2e2;i++)x.fillStyle=`hsla(${i*2+t*99},${99*S(t/i)}%,50%,.03)`,x.fillRect(960+S(t)*9*i,540+C(t)*9*i,i*C(i/t),i*C(i+t))

Oct 3 2019 5:39 AM UTC

}// 127/140

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Smudge and shine

u/joeytwiddle

Not a patch on d/9008 tho
u/joeytwiddle

#shiny

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metamero

function u(t) {

localStorage.Ç="𫢁򑒤𰀅𐱣𐳅𜸄𱂀𑀃𰰣𹑮𰘃𩂀𐰃𨰃𩒀𐱤𨁠𨲡򨸄𒰋𐲃𐵄񨅠𨁠𩂁򂡄𹀇𢒫񣅀𨁠𐱄𹀧𢒫𴢀𸦇𒐉𐲃𒐃𒐉𐲃𸂂񉔀񐧈𰣥񠐱𸩧񑁑񉐮𡂤𙱉𺵌񠁠𨀣𡂤𑱉𺱯𛙦򙁄񚧧𢃨񛄠𨁠𙀉𐰉𒐃𰲁𰣥񐕢򁀣򒀈𒀃𨰃𹄀񐁠𨁣𰙥򑀇𑰃𰰃𩃠񈁠𨁤𰐃"
location='/id/15868'

Oct 1 2019 4:38 PM UTC

}// 121/140

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"código" poem logo by Augusto de Campos (1973) transcreation by Marcos Assis (2019)

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DataMeta

function u(t) {

c.style.background=R(g=S(t*1.5)*255,g,g);if(t<3)for(i=1920;i--;)
x.fillStyle=R(l=i/7.5,l,l),x.fillRect(i,540-C(t)*i/5,13,13)

Sep 28 2019 4:17 PM UTC

}// 124/140

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Had this laying around. Demonstrates the #illusion in d/15823. The triangle's #gradient remains unchanged.

u/DataMeta

The center of the base of the triangle doesn't exhibit the illusion strongly since there is a constant reference color near it and it is far from the changing background.
u/iverjo

#opticalillusion

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tomxor

remix of d/15822 by u/joe.m

function u(t) {

for(c.width=w=X=1920;X--;x.fillRect(X,w*Y/18,9,9))
for(Y=n=5;n--;k=n*2+1,Y+=S(38*X/w*k)/k**(2-S(5*X/w-3*t)))1

Sep 27 2019 8:03 PM UTC

}// 109/140

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Squine Wave

Show more comments…
u/Xen

i wanna hear it!
u/tomxor

Oh no the challenge has been set! i'd imagine it sounds a bit like wavetable synthesis, even though it's not.
u/KilledByAPixel

it sounds like tone morphing between a sine and square wave.
u/katkip

interesing
u/katkip

^ with t
u/iverjo

#waveform

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joe.m

function u(t) {

w=1920
f=12.57/w
t?0:y=[]
j=t*120+1
for(i=0;i<w;i++)
{
if(!t)y[i]=0
y[i]+=S(i*f*j)/j
x.fillRect(i, 520+400*y[i], 1, 1);
}

Sep 27 2019 2:59 PM UTC

}// 121/140

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ooh, you can keep state!

u/tomxor

#fourier
u/tomxor

Welcome to Dwitter! you can also use u instead of y to save the initialisation space, as you can use functions for their object properties.

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rodrigo.siqueira

function u(t) {

x.fillStyle='gray';x.fillRect(250,440,1420,200)
x.fillStyle=R(t*70,t*70,t*70)
x.fillRect(t*510,0,9,1080)

Sep 27 2019 2:25 PM UTC

}// 104/140

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Illusory gradient grayscale ("Simultaneous Contrast Illusion"). The bar in the middle is a CONSTANT SHADE of gray. Viewing two colors at the same time influences both of their appearances. #gradient #illusion

u/iverjo

#opticalillusion

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joe.m

function u(t) {

w=1920
c.width=w
f=6.28/w
for(i=0;i<w;i++)
{y=0
for(j=1;j<=Math.abs(((20*t)%40)-20);j+=2) y+=S(i*f*j)/j
x.fillRect(i, 520+520*y, 10, 10);}

Sep 27 2019 1:09 PM UTC

}// 138/140

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sum of even harmonics

u/tomxor

#fourier

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