Dweets awesomed by u/andrea270872

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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rodrigo.siqueira

remix of d/28259 by u/rodrigo.siqueira

function u(t) {

c.width|=0
for(i=2e4;i--;x.fillRect(960+C(K=S(i)*i+t/5+a)*999*a+a*S(t)*299,540+S(K)*490*(a),Z=9+30*a*S(t+i/300),Z))a=(i/9999+t/9)**2%2-2

Aug 20 2023 10:34 PM UTC

}// 136/140

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Debris vortex

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KilledByAPixel

remix of d/13273 by u/KilledByAPixel

function u(t) {

for(i=w=2e3;i--;x.fillRect(i,0,.1,w))x.clearRect((i**3+i%9*t*20)%w,i,3,i%5)

Aug 20 2023 6:30 PM UTC

}// 75/140

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2D #Starfield 🌟

u/KilledByAPixel

5 bytes smaller plus trails!

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KilledByAPixel

remix of d/28307 by u/KilledByAPixel

function u(t) {

for(j=5e3;r=j--/(j%(t/500+3)*3);x.fillRect(j,0,.1,2e3))x.clearRect(C(j)*r+960,S(j)*r+540,r/=50,r)

Aug 19 2023 2:57 PM UTC

}// 97/140

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Into The Singularity 🌀

u/Joachim

You never see it coming ;)
u/neimad

It's amazing the things that can be achieved with fillRect

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Smorg

function u(t) {

for(k=p=150;k--;)for(i=p;i--;)s=12,X=k/20,Y=i/20,l=(X-5*C(Y+t))**2+(Y+6*S(X+t/2))**2-s,x.fillRect(k*s,i*s,s,s),x.fillStyle=R(l>1?l:p-l*s%60)

Aug 19 2023 2:06 AM UTC

}// 140/140

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Mitosis

u/Smorg

Might be very laggy for some. Oops!
u/aleamb

very very awesome!
u/Joachim

#metaballs

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andrea270872

remix of d/28279 by u/rodrigo.siqueira

function u(t) {

with(x)for(fillRect(0,0,w=2e3,i=w);i--;strokeRect(960-i/2,540-i/2,i*2,i))setLineDash([i,99,i]),strokeStyle=R(lineDashOffset=w+i*t,w)

Aug 13 2023 8:28 AM UTC

}// 132/140

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just playing around with the params and the shadows

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rodrigo.siqueira

remix of d/20182 by u/danny@hille.dk

function u(t) {

with(x)for(fillRect(0,0,w=2e3,i=w);i--;strokeRect(960-i/2-i*C(t),540-i/2,i*2,i))setLineDash([i]),strokeStyle=R(lineDashOffset=w+(5*t%2*i),w)

Aug 12 2023 11:27 PM UTC

}// 140/140

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Square Spiral #Tunnel

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Tekmap

remix of d/20182 by u/danny@hille.dk

function u(t) {

with(x)for(fillRect(0,0,w=2e3,i=w);i--;strokeRect(960/i,540-i,j=i*2,j))setLineDash([i]),strokeStyle=R(p=lineDashOffset=w+i-S(i/99-t)*i,p)

Aug 11 2023 11:11 PM UTC

}// 137/140

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u/joeytwiddle

Wow!

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rodrigo.siqueira

remix of d/28273 by u/rodrigo.siqueira

function u(t) {

f=n=>3*(n+~n+.5)**2
for(c.width%=X=2e3;X--;)for(Y=9,k=2;k<10;k++,Y-=f(-f(1.7**k*X/2e3/k+t/3))/1.3**k)x.fillRect(X,Y*99+X*S(t)/4,C(k)/2,3e3)

Aug 11 2023 11:05 PM UTC

}// 139/140

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Sailing in rough sea (for those who do not suffer from seasickness) #sea #water

u/cantelope

awesome progression and artistic purposing of this function :)
u/joeytwiddle

What's going on here? How can you use bitwise not (~) on a floating point number?
u/joeytwiddle

Oh, it looks like ~ makes the number negative, and then rounds it down
u/joeytwiddle

So with n+~n+.5 you get a sawtooth in the range -.5 to +.5, based on the fractional part of n

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rodrigo.siqueira

remix of d/28264 by u/rodrigo.siqueira

function u(t) {

for(c.width%=X=2e3;X--;x.fillRect(X,Y*600+200,1,3e3))for(Y=1,k=9;k--;Y-=f(t/2-f(3**k*X/1918))/2**k)f=n=>2*(n+~n+.5)**2

Aug 8 2023 7:24 PM UTC

}// 118/140

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Pulsating Blancmange waves

u/robbyg

My eyes can't decide what is foreground and what is background. I think it all depends on the edges: when the black is further up the edge, white is foreground.
u/cantelope

nice

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Xen

function u(t) {

for(i=1e3;i--;)x.fillRect(t*i*7.31%2e3,t*i*3.71%1e3,1,1)

Aug 7 2023 2:59 PM UTC

}// 56/140

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#slowburn quick play #art

u/andrea270872

nice shading

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