Hot dweets by u/Foldster

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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Foldster

function u(t) {

s=S(t)
o=C(t)
c.width=1920+200*s
for(k=.01;k<1;k+=.01){
i=k%1
j=k*9%1
i=s+2*i-j-o*i*j
j=o+s*i+j-2*s*i*j
x.fillRect(800+i*300,(3+j)*150,8,8)}

May 24 2020 4:13 AM UTC

}// 140/140

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In the Breeze

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Foldster

remix of d/18941 by u/Foldster

function u(t) {

for(i=a=b=-100;i<99;i++)
{r=t**i%3
a=(r>2)+a/2+b/3
b=(r<1)+b/2
s=1e3/t
x.fillStyle=R(v=5*t,v,v)
x.fillRect(9e2*b+(2-a)*150,5e2*a+s,2*i/t,s)}

May 23 2020 8:32 PM UTC

}// 140/140

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Faster Moonlit Mountains

u/Foldster

Huh that's actually really weird. The moon renders differently on my phone and on my computer
u/Xen

nice!

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Foldster

function u(t) {

v=t<.02?1920:.15
for(i=1;i<1e4;i++)
t?x.fillRect(a=I(a),c=I(c),v,v):a=I=p=>p>0&p<2e3?p-1+Math.random()*2:i
x.fillStyle=`hsl(${a/6},100%,50%`

May 24 2020 9:28 AM UTC

}// 140/140

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Dark Rainbow

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Foldster

function u(t) {

for(i=-1;i<1;i+=.01){
[a,b]=t?[d=(2e3*(a*b%2<1)-a-b)/2,a+d]:'00'
s=2e4/t/t
x.fillStyle=R(0,450/t**.4,s)
x.fillRect(800+a,b+s,i*s,2)}

May 21 2020 5:38 AM UTC

}// 132/140

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Fractal Hills 2

u/bandaloo

looks like something submerged in water
u/Foldster

Yeah it's like an archipelago
u/Foldster

Let it play out and the islands become much more defined
u/Foldster

Like this is what I was going for https://www.worldatlas.com/r/w1200-h701-c120…
u/bandaloo

nice! comes pretty dang close to the source image

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Foldster

function u(t) {

for(i=a=b=-100;i<100;i++)
{r=(t**i)%3
a=(r>2)+a/2+b/3
b=(r<1)+b/2
s=1e3/t
x.fillStyle=R(t,t,t)
x.fillRect(9e2*b+(2-a)*150,5e2*a+s,2*i/t,s)}

May 23 2020 7:50 PM UTC

}// 139/140

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Fractal Hills 3: Moonlit Mountains

u/Foldster

#waitforit

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Foldster

function u(t) {

x.fillStyle=R(255,0,50*S(t)+100)
for(j=500;j<1e3;j++)
x.fillRect(j*(s=(t/10)%1)*C(t)+1e3,500*s-j*Math.min(v=(t/12)%1,1-v)+650,.5,.5)

May 22 2020 12:04 PM UTC

}// 133/140

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Rose

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Foldster

function u(t) {

r=0|Math.random()*3
w=100
u.x=[a,b]=t?[a/2+40+v[r]*w,b/2+v[r+3]*w]:v="417155"
x.font=t+"px A"
x.strokeStyle=R(a/6,b/6)
x.strokeText("●",a,b)

May 20 2020 11:55 PM UTC

}// 140/140

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Bubbly Sierpinski

u/Xen

cool idea #waitforit

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Foldster

function u(t) {

t*=500
c.width+=0
for(i=1;i<80;i++)
for(j=0;j<100;j++)
(((j+(s=i+t))^(s-j))**2)%51<2?x.fillRect(7*i+1.5*j*(130-i)/10,10*(110-i),10,10):1

May 18 2020 3:55 PM UTC

}// 136/140

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Bitfield Road

u/tomxor

O_o i recognise this pattern... shameless plug, here's the interactive gamified version: d/15502
u/ntsutae

This feels good.
u/sigveseb

Almost looks like guitar hero

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Foldster

function u(t) {

q=255
for(i=a=b=g=0;i<2e3;i++)
{s=i*t*g%2<1
d=3*s-a-b
b=a+(a=d/2)
g=(s+g)/2
x.fillStyle=R(q*g,q*g)
x.fillRect(a*330+850,400+b*q,1,q/t**2)}

May 17 2020 11:21 AM UTC

}// 138/140

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Fractal Hills

u/katkip

wow

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Foldster

function u(t) {

c.width+=0
for(i=0;i<100;i+=1.1+S(t/5))
{r=10*1.15**i;y=r*C(i);z=r*S(i)
x.fillRect(y+1000,z+500,-y/2,-z/2)}

May 18 2020 6:35 PM UTC

}// 107/140

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Back to the Past

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