Top 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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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) {

I=S(t)
O=C(t)
a=Math.sqrt(4e5/t)
b=4*a/5
for(i=9;i--;)x.fillStyle=`hsl(${t*b/i},66%,66%)`,x.fillRect(500+i%3*2*a+a*O-b*I,i*199+a*I+b*O,a,b)

Mar 7 2017 12:02 AM UTC

}// 139/140

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Lituus spiral

u/Constantin

Oh good old Win XP

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sfz

function u(t) {

z=~~(t/3+1)
l=255
for(m=7;m>0;m-=.003)X=940*(1+S((9*z%7+1)*m+t)),Y=504*(1+S((7*z%9+1)*m)),x.fillStyle=R(0,l*C(m),l*S(m)),x.fillRect(X,Y,6,6)

Mar 2 2017 8:42 PM UTC

}// 140/140

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u/SpecialAgent

Very nice!

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sfz

remix of d/1507 by u/Kebabman13

function u(t) {

d=new Date
t?o.push([w=777+d%9,-500,9,9]):o=[]
x.fillStyle=R(99,d&w/2)
o.map(a=>(x.fillRect(a[0]+=a[2]+=-t%1+S(t),a[1]+=a[3]+=t%1,55,0.1)))

Feb 27 2017 11:17 PM UTC

}// 140/140

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Grass is greener

u/donbright

nice build up

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sfz

remix of d/1151 by u/sfz

function u(t) {

a=23
for(j=7;j<a*4;j+=7)
for(i=7;i<a;i++)
s=t/i,l=a*i,m=a*j,x.fillStyle=R(l*C(s+i),m*C(s+j),m*S(s)),x.fillRect(m+i*l*S(j+s),l+m*C(i+s),i,i)

Feb 24 2017 8:05 AM UTC

}// 139/140

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sfz

function u(t) {

a=37
t/=7
for(j=7;j<a*4;j+=7)
for(i=7;i<a;i++)
l=a*i,m=a*j,x.fillStyle=R(l*C(t+i),m*C(t+j),m*S(t)),x.fillRect(a*a+i*l*S(j+t),l+m*C(i+t),j,i)

Feb 24 2017 7:49 AM UTC

}// 140/140

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u/lionleaf

Chaotic

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sfz

function u(t) {

d=t*32|0;if(!(d%42))i=new Image(),i.src="//unsplash.it/"+d%469,i.onload=()=>{x.fillStyle=x.createPattern(i,''),x.fillRect(0,0,2e3,1e3)}

Feb 23 2017 8:38 PM UTC

}// 135/140

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sfz

remix of d/2134 by u/sfz

function u(t) {

for(i=l=540;i-=9;)z=t/7%1,x.fillRect(X=z*2e3-270,Y=S(t)*l+l,l*(q=C(t/X)),2+(r=C(t/Y))),t+=7.6,x.fillStyle=R((i&48)<<3,(i&9)<<5,(i&3)<<7,q*r)

Mar 15 2017 4:29 PM UTC

}// 140/140

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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

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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