Dweets awesomed by u/ionre

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: #Opposites

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joeytwiddle

remix of d/4842 by u/joeytwiddle

function u(t) {

c.width=W=400;d=-2.1;e=1.9;for(l=j=t,i=3e4;i--;x.fillRect(W/2+j*W/5,W/4+l*W/9,.3,.3))k=S(d*l)+C(t)*C(j*d),m=S(e*j)+S(t)*C(l*e),j=k,l=m

Jan 3 2018 2:13 AM UTC

}// 134/140

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This version is easier to tweak. Medium: W=1e3, i=2e5 Heavy: W=2e3, i=1e6

u/joeytwiddle

Please upvote the original (where most of the work was done!)
u/joeytwiddle

by Jezza

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Zolden

function u(t) {

c.width|=0;for(k=0;k++<1999;){j=k%20;q=j*j;
i=k/20;p=255-q*j/30;x.fillStyle=R(p,p,p,1);x.fillRect((q+75)*i-q*(t+8)*3,q*2,q/2,j*40)}

Jan 2 2018 11:29 PM UTC

}// 131/140

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Xen

remix of d/5282 by u/travistx

function u(t) {

x.globalAlpha=.1
x.lineWidth=99
x.strokeStyle=`hsl(${(Z=t*t/8)*7},100%,50%)`
x.beginPath()
x.fill(x.arc(960,540,Z%2*600,Z-1,Z+1))
x.stroke()

Jan 2 2018 10:59 PM UTC

}// 140/140

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little remix

u/crimbles

Trippy

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hoplite

function u(t) {

i=c.width=96;for(;i--;)for(k=54;k--;)A=t=>(S(i/9+t)*S(k/7)+S(k/9+t)*S(i/7-t))*255,x.fillStyle=R(A(t),A(t+.2),A(t+.4)),x.fillRect(i,k,1,1)

Jan 2 2018 10:57 PM UTC

}// 137/140

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Show more comments…
u/Xen

very nice style
u/sigveseb

Quite excellent, very nice
u/joeytwiddle

Lush
u/magna

Wow! Nice!
u/crimbles

That's so nice
u/Chipnstein

Woah... new dosktop background
u/codeslaw

Yes
u/joeytwiddle

#plasma #metaballs #color
u/vain

nice plasma like fx

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doof

remix of d/5072 by u/doof

function u(t) {

with(x)rotate(1/(t||translate(n=960,540))/99),drawImage(c,-957,-537,1914,1074),fillStyle=`hsl(${t*90},50%,50%)`,fillRect(-n,S(t)*n,n+n,t&63)

Jan 1 2018 4:59 AM UTC

}// 140/140

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u/donbright

hell yes. great

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RyanFelton

function u(t) {

for(i=-1;i++<4000;){h=i%20;j=Math.floor(i/20);;x.fillStyle=R(h*S(t)*12,j*C(t)*12,(h+j)*C(t+10)*6);x.fillRect(96*h,54*j,96,54);}

Jan 1 2018 3:32 AM UTC

}// 127/140

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doof

function u(t) {

t||x.translate(960,540)
with(x)rotate(T(t*t)*.01),drawImage(c,-957,-537,n=1914,1074),fillStyle=`hsla(${t*60},50%,50%,.02)`,fillRect(0,0,n,n)

Jan 1 2018 2:59 AM UTC

}// 140/140

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ionre

function u(t) {

c.width^=0
for(i=0;i++<70;){x.beginPath()
x.fillStyle=R(40,150,0,i/70)
a=100+12*i
b=i*(t+9)/32
x.arc(960+a*C(b),540+a*S(b),30,0,7)
x.fill()}

Jan 1 2018 1:53 AM UTC

}// 140/140

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u/iverjo

#spiral #dots

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jonathan_b

remix of d/5064 by u/jonathan_b

function u(t) {

for(c.width|=s=490,q=t%s,i=s*9;i>0;)for(j=9;--j;)x.fillStyle=R(s/T(q-i),j*25,i/9,3/j),x.fillRect(999+s*2*C(i-q)*C(t%q-j-i),s+s*S(i--),25,25)

Jan 1 2018 1:52 AM UTC

}// 140/140

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u/joeytwiddle

This one feels very 3-D

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doof

remix of d/4970 by u/doof

function u(t) {

t||x.translate(960,540)
x.rotate(.001)
x.drawImage(c,-940,-520,1880,1040)
x.fillStyle=`hsla(${t*60},50%,50%,.3)`
x.fillRect(0,0,1,1e3)

Jan 1 2018 1:41 AM UTC

}// 134/140

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