Dweets by u/pavel

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Opposites

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pavel

remix of d/10601 by u/anotherkitten

function u(t) {

with(x)for(i=60;r=5e-9*(i+3*t%2)**6,d=S(r/25-4*t)*r,--i;beginPath(fill(arc(960+d,540+d,9*r,0,7))))fillStyle=`hsl(${r+i%2*r-20*t} 50%${r/2}%`

Oct 23 2018 1:56 AM UTC

}// 140/140

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u/iverjo

#tunnel

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pavel

remix of d/10605 by u/anotherkitten

function u(t) {

for(c.width|=i=32;i--;)for(j=12;j--;x.fillRect(860+S(A=t%1/5+(i&1?i:-i)/10)*600,700+C(A)*300*S(t)-j*16,200,16))x.fillStyle=R(p=j*16,p,p)

Oct 22 2018 5:57 PM UTC

}// 136/140

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u/13thptr

#torus #d3

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pavel

function u(t) {

if(!t)a=0,i=1050,j=800,x.font="99px a"
with(x)save(),restore(fillText("🚀",!translate(i+=9*S(a+=(t%3-1)/9),j+=9*C(a)),!rotate(2.4-a)))

Oct 21 2018 7:53 AM UTC

}// 133/140

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u/katkip

cute!

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pavel

remix of d/10485 by u/joeytwiddle

function u(t) {

for(z=42;j=z-->>1;x.fillRect(960+S(k)*15-w/2,540+C(k)*15+w/2-r,w,2*r-w))k=7*t-j/2,x.fillStyle=`hsl(${15*k},33%,${7*j}%)`,r=50*j,w=r*(.5+z%2)

Oct 20 2018 8:43 PM UTC

}// 140/140

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Fixed the plus shape in the back and added color cycling

u/pavel

Check it out in fullscreen

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pavel

remix of d/10516 by u/pavel

function u(t) {

c.width^=t?onmousemove=e=>X=e.x/99:X=0
for(i=99;i--;x.lineTo(960+a*S(p)/.7,540+(i&4?a:-a)))a=960/(3+C(p=(i-(i>>2))*6.28/(t&7)-X))
x.stroke()

Oct 17 2018 7:06 PM UTC

}// 140/140

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#minimal #perspective #d3 #cube #interactive

u/aleamb

awesome!

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pavel

remix of d/10512 by u/f8f82804

function u(t) {

c.width^=t?onmousemove=e=>X=e.x/99:X=0
for(i=17;i--;x.lineTo(960+a*S(p)/.7,540+(i&4?a:-a)))a=960/(3+C(p=1.57*(i-(i>>2))-X))
x.stroke()

Oct 17 2018 4:40 AM UTC

}// 134/140

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#minimal #perspective #d3 #cube #interactive

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pavel

remix of d/8136 by u/Friend

function u(t) {

onkeydown=e=>k=e.keyCode-73
w=2e3
s=32
x.fillStyle="hsl("+t*71+",99%,50%)"
t?x.fillRect(p%w,p/w,s,s):p=k=3
p+=2e6+(k<2?-s:s)*(k&1||w)
p%=2e6

Oct 16 2018 10:45 PM UTC

}// 140/140

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Rainbow Snake - Use IJKL to turn #interactive

u/pavel

Click the canvas once before pressing keys
u/pavel

#snake

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pavel

function u(t) {

t||(i=a=n=0,j=1e3,f=n=>n&&f(n>>1)-n&1)
for(z=n<4e4&&44;z--;)f(n++)?x.fillRect(i-=.88*C(A=a*Math.PI),j+=.88*S(A),2,2,a+=1/3):a--

Oct 15 2018 9:39 PM UTC

}// 127/140

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Koch curve #fractal

u/pavel

This is a turtle graphic, the function f(n) implements the Thue–Morse sequence

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pavel

function u(t) {

w=c.width=500
for(i=98;i--;)for(j=55;X=i/9-5,Y=j/9-3,Z=3*S(t),j--;)(X**3+Y**3+Z**3-2*C(t)*X*X*Y*Y)<9&&x.fillRect(5*i,5*j,5,5)

Oct 15 2018 4:40 AM UTC

}// 125/140

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pavel

remix of d/10356 by u/pavel

function u(t) {

for(x.fillRect(0,0,X=w=c.width=600,w);X-=6;)for(r=X**2.3%w,Y=h=r*t&504;Y;x.fillText(r*Y&1,X,Y-=8))x.fillStyle=R(b=Y-h||w,250+Y-h,b)

Oct 15 2018 12:05 AM UTC

}// 131/140

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#matrix #rain v3 shorter, faster, and with variable speed droplets

u/joeytwiddle

Let the white burn briefly: b=250+(Y-h)*6

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