Dweets by u/sfz

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.

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Current theme challenge: #ScaryMovies

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sfz

remix of d/2131 by u/recursive

function u(t) {

for(i=63;i--;)z=t/7%1,x.fillRect(X=z*2e3-99,Y=S(t)*540+540,80/z,80*z),t+=99/13,x.fillStyle=R((i&48)<<3,(i&12)<<5,(i&3)<<7,S(t/X)*C(-t/Y)/9)

Mar 14 2017 9:09 PM UTC

}// 140/140

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No room to spare.

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sfz

remix of d/2105 by u/mxfh

function u(t) {

c.width|=w=999
h=540
a=w+w*S(t)/3
b=h+h*C(t)/2
with(x)font='3em Arial',fillStyle='#aaa',fillText('The BEATLES',a,b),strokeRect(a-h,b-h,w,w)

Mar 14 2017 8:38 AM UTC

}// 139/140

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Dwitter Album Covers

u/sigveseb

haha nice

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sfz

remix of d/2072 by u/sfz

function u(t) {

c.width|=h=500
for(i=63;a=2*h+(S(t+i)+1)*h,b=i+(C(t+i)+1)*h,i--;)x.fillText(0,a,b),x.arc(0,0,(a**2+b**2)**.5,i,Math.atan2(b,a),0),x.stroke()

Mar 13 2017 7:44 AM UTC

}// 140/140

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u/donbright

gets pretty interesting the longer i watched it

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sfz

remix of d/2072 by u/sfz

function u(t) {

c.width|=h=540
for(i=42;i--;){a=S(t)*h/i
b=C(t)*h/i
x.beginPath()
x.arc(960,h,i*i,0,Math.atan2(a,b),0)
x.fillStyle=R(0,a*b,3*i,.1)
x.fill()}

Mar 12 2017 6:36 PM UTC

}// 140/140

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sfz

function u(t) {

for(i=99;i--;){a=(S(t)+1)*2e3/i
b=(C(t)+1)*1e3/i
x.beginPath()
x.arc(0,0,(a**2+b**2)**.5,0,Math.atan2(a,b),0)
x.strokeStyle=R(b)
x.stroke()}

Mar 12 2017 5:39 PM UTC

}// 140/140

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sfz

function u(t) {

for(i=7;i>0;i-=.1)for(a=j=600;j>=-a;j-=56)x.fillStyle=R(0,0,(j+a)/i,.1),x.fillRect(960+j*(Math.atan(z=i+t)-T(z)),540-320*(S(z)+C(j+t)),9,9)

Mar 12 2017 4:43 PM UTC

}// 139/140

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u/donbright

really like the feel and rythym of this one.
u/donbright

oh i know why! this is the Hooloovoo that Douglas Adam's talked about, the hyperintelligent shade of blue?
u/sfz

hahah well, I wasn't so ambitious, just messing with atan

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sfz

remix of d/1926 by u/sfz

function u(t) {

I=S(t)
O=C(t)
a=Math.sqrt(t*999)
b=4*a/5
for(i=9;i--;)x.fillStyle=`hsla(${t*b/i},80%,66%,.01)`,x.fillRect(i%3*4*a+a*O-b*I,i*139+a*I+b*O,a,b)

Mar 9 2017 10:47 AM UTC

}// 140/140

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Fermat's spiral

u/donbright

reminds me of impressionist watercolor eventually

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sfz

remix of d/1962 by u/sfz

function u(t) {

w=950
V=t%13+3
for(i=V;i>0;i-=2/w)x.fillStyle=`hsla(${7*t*i},66%,66%,.2)`,x.fillRect(w+w*S(t*i+2*V),w/2+w/2*S(V*i+2*t+3),V,V)

Mar 8 2017 7:22 PM UTC

}// 125/140

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Harmonograph II.2

u/donbright

i like these colors
u/sfz

I call it Mathematician's Plaid

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sfz

remix of d/1922 by u/sfz

function u(t) {

c.width|=w=950
V=t%13+3
for(i=V;i>0;i-=1/w)x.fillStyle=`hsl(${7*t*i},66%,66%)`,x.fillRect(w+w*S(t*i+2*V),w/2+w/2*S(V*i+2*t+3),V,V)

Mar 8 2017 10:52 AM UTC

}// 130/140

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Harmonograph II

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sfz

function u(t) {

W=c.width|=0
for(i=q=20,h=q*9,H=3*h;i>0;i-=.01)N=C(t*q),O=C(i),V=3**O-2*C(4*i)-S(i/q)**5,x.fillText('🦋',W*t%4e3-H+h*O*V,H+h*(N+N*S(i)*V))

Mar 8 2017 7:06 AM UTC

}// 137/140

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Butterfly for my daughter

u/sfz

(Chrome only)
u/magna

Awesome!
u/sigveseb

Creative ^^
u/donbright

works in newer firefox!!!
u/sfz

woohoo

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