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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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nix

remix of d/8014 by u/nix

function u(t) {

for(c.width|=i=0;i<900;i++){x.fillStyle=R(0,(t)+200,S(t)*99+i,0.21)
x.fillRect(T(i)*1+i+300*T(t+i),500+2000*S(i),
 (990*S(2*i+t)),9+(t%99))}

May 7 2018 9:25 PM UTC

}// 140/140

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markuspeitl

function u(t) {

x.beginPath()
X=t%20*150+200*S(t)
x.moveTo(X,1e3)
x.lineTo(X+600*S(t*1.5),0)
K=255
x.strokeStyle = R(K*T(t/2),K*S(t/2),K*C(t/2))
x.stroke()

May 7 2018 9:09 PM UTC

}// 139/140

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u/prplz

I love interference patterns!

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nix

remix of d/452 by u/iverjo

function u(t) {

for(i=4e3;i--;)c=15+99*S(t+4*S(t*9)),x.fillStyle=R(0,c,99+c),s=45/(9-(i/99)%t),x.fillRect(960+99*s*C(i),540+25*s*S(2*i),S(t-i),t*t)

May 7 2018 8:34 PM UTC

}// 131/140

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cesque

function u(t) {

c.width|=0
x.lineWidth=10
for(i=1;i<9;i++) {
 x.beginPath()
 x.arc(960,540,50+(i*50)+S(t+i/5)*50,t+(i*3)+S(t),t+(i*3.1)+3.6)
 x.stroke()
}

May 7 2018 7:39 PM UTC

}// 138/140

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iverjo

remix of d/8018 by u/cesque

function u(t) {

t*=4;c.width|=0
x.lineWidth=10
for(i=1;i<9;i++) {
  x.beginPath()
  x.arc(960,540,50+(i*50),t+(i*3)+S(t),t+(i*3.1)+3.6)
  x.stroke()
}

May 7 2018 5:14 PM UTC

}// 134/140

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markuspeitl

function u(t) {

c.width|=0
c.onclick=(e)=>{X=e.pageX;Y=e.pageY}
x.fillStyle='#'+X
x.globalAlpha=.6
for(i=0;i<4e2;i++)
x.fillRect(i*9*T(t),Y*(2+S(i*t)),X,50)

May 7 2018 4:53 PM UTC

}// 140/140

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Click the canvas to start the cannon :)

u/iverjo

#interactive
u/iverjo

I like the fact that it changes color based on where you click
u/joeytwiddle

https://www.youtube.com/watch?v=E_hD3fxmH58 Vexare - Firing (my laser)

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roc3n

function u(t) {

c.width|=0
x.lineWidth=1
  for(i=0;i<20;i++)
{
  x.beginPath()
  x.arc(960,540,3+(i*28),t,t+0.3)
  x.stroke()
}

May 7 2018 2:46 PM UTC

}// 111/140

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SETI

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prplz

function u(t) {

c.width=-1;Q=40;for(X=W=20;X--;)for(Y=W;Y--;)X&1^Y&1&&x.fillRect(X*W-Q+t*100%Q,Y*W-Q+S(t)*200%Q,W,W)

May 7 2018 1:14 PM UTC

}// 100/140

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u/BuRRak

Nice! Looks quite similar to my dweet, d/7996 :D
u/iverjo

You just taught me that c.width=-1; actually sets the canvas width to 300. Clever!
u/BuRRak

300 is the default size of a canvas so giving a negative number will just reset it to defaults i guess
u/prplz

iverjo: I give credit to u/jylikangas for the -1 width trick
u/prplz

BuRRak: Thanks, same goal different approach :)

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markuspeitl

function u(t) {

c.width|=0
if(!c.x)c.x=9,y=9,f=25,g=70
f=f+S(t);
c.x<9||c.x>1850?f=-f:f
y<9||y>999?g=-g:g
c.x+=f
y+=g
x.fillRect(c.x,y,50,50)

May 7 2018 9:02 AM UTC

}// 125/140

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joeytwiddle

remix of d/8010 by u/joeytwiddle

function u(t) {

for(c.width|=p=0;p++<1e3;x.fillRect(X+4,Y+4,w-8,w-8))r=p/4,k=2*t+r/50,x.clearRect(X=960+600*S(k)+r*C(p),Y=510+250*S(k/.5)+r*S(p),w=19+r/5,w)

May 7 2018 8:24 AM UTC

}// 140/140

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Angry box worm

Show more comments…
u/joeytwiddle

Basically the same monster, just better presented
u/iverjo

Here's that same monster (from the side) after it eats one of those invincibility rainbow stars that Mario likes to consume: d/1806
u/iverjo

#worm
u/prplz

It looks like it's always getting closer, cool!
u/lionleaf

#organic
u/joeytwiddle

When it was younger: https://www.dwitter.net/d/1879
u/joeytwiddle

Lol u/iverjo, I get the tune in my head