Dweets awesomed by u/codeslaw

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: #ScaryMovies

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nystrand

function u(t) {

p=(a,b,d,w=1)=>d>3?x.fillRect(a-w,b-w,d*w,d*w)&p(a,b,d-5)&p(a+b*C(t+d),b+a*S(d)/8,d-4):x.fillStyle=R(d*88,d*a/9,50+d*99,.3);p(a=650,a,60,a)

Mar 29 2017 8:25 PM UTC

}// 139/140

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u/cantelope

incredible!
u/magna

So pretty!
u/nonce

wow
u/sfz

holy shnikes!
u/donbright

great colors
u/iverjo

#galaxy
u/vain

incredible code and fx. the source is to cryptic for me. XD

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codeslaw

function u(t) {

x.drawImage(c,-10+S(t)*4,0)
i=e=1900;while(i--)x[g='fillText'](['💭','🌎','🍁','👾','😂'][Math.abs(~~(5*S(C(i)*6)))],e-i%20,S(i+S(S(t)))*e)

Mar 29 2017 9:10 AM UTC

}// 134/140

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Tapestry #1

u/z3vin

nice use of emoji as coloring
u/recursive

That's a very convincing woven rug.
u/sigveseb

very nice! also looks quite different from platform to platform (windows, mac, android, etc)
u/magna

Looks super great on Chrome on macOS.
u/joeytwiddle

#texture #colors #tartan #cloth #material

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scottglz

remix of d/2329 by u/sfz

function u(t) {

x.fillRect(0,0,z=1e9,z);for(i=h=540;i--;x.clearRect(2*h+2*o.x*O-o.y*I,h-o.y*O-o.x*I/3,7,4))I=S(t-i),O=C(t-i),o=t?u[i]:u[i]={x:z*i%h,y:z/i%h}

Mar 29 2017 1:58 AM UTC

}// 140/140

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The stars cried out for spacification

u/sfz

sweet!
u/donbright

super
u/Cloud

#fly

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nystrand

function u(t) {

p=t?(c.width|=n=960,p.push([7,n*S(t)]),p.map(([a,b,d=0,e=b])=>[f=a+a-d,g=b+b-e,f>n?f+6:a,f>0&g<0?g+g:b+.3,x.fillRect(500+a,n-b,22,22)])):[]

Mar 28 2017 4:58 PM UTC

}// 139/140

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u/donbright

excellent
u/katkip

#physics

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donbright

remix of d/1399 by u/Kalanchoe

function u(t) {

c.width^=0
t?o.push({X:1,Y:1,U:S(t),V:C(t)}):o=[]
o.map(a=>{Q=a.X**2+a.Y**2,a.X+=a.U-=a.X/Q,a.Y+=a.V-=a.Y/Q,x.fillRect(a.X,a.Y,9,9)})

Mar 28 2017 1:45 AM UTC

}// 133/140

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Another fake gravity sim. This time, some particles get slingshotted out of the system, past escape velocity, others teeter on the brink, and others congregate at 0,0. After a while, the screen is full of a bunch of particles leaving, and others coming back in towards the origin.

Show more comments…
u/nonce

your gravity sims are amazing.
u/z3vin

agreed
u/donbright

thanks this site is very inspiring
u/alien

WOW ,Hi what does this mean :D c.width^=0
u/donbright

alien it basically clears the screen to the default width. in detail, i think it is combining "binary xor" with "set equal to", so basically c.width = c.width xor 0, and since anything xored with 0 is itself, its basically setting c.width to itself.
u/donbright

#physics

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z3vin

remix of d/2322 by u/z3vin

function u(t) {

r=(n)=>Math.random()*n;h=w=1920;with(x)beginPath(),moveTo(0,0),lineTo(r(w),r(h)),strokeStyle='#fff',stroke(),fillRect(r(w),r(h*2.5),r(99),h)

Mar 27 2017 6:43 PM UTC

}// 140/140

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thanks @mxfh

u/donbright

never have i wished so much for a 'pause' function. cool pictures
u/z3vin

haha yes a lot of scenic moments in the city :) @donbright

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sfz

remix of d/2313 by u/tapgiles

function u(t) {

with(x)!t?translate(960,a=540):beginPath(),moveTo(a,0),rotate(9e6*t/~new Date),lineTo(a,0),strokeStyle=`hsla(${t*9},99%,50%,${t%1}`,stroke()

Mar 26 2017 8:08 PM UTC

}// 140/140

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Give it a minute

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u/donbright

i wound up with a golden pentagon, i love it
u/donbright

i wound up with a golden pentagon, i love it
u/tapgiles

Not bad ^^
u/nonce

wow so cool, also great pro tip: you can leave off the ')' in an hsl/hsla string!
u/sfz

found that one by accident
u/z3vin

Parentheses trick doesn't seem work on iPhone safari :(

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nonce

function u(t) {

Q=210+~~(t*9)*160
U=(''+u).replace(/[^Q]+/,'')
I=U.split('\n')
N=I[~~(t*9)]
E=x.font='111px monospace'
  x.fillText(N,20,Q)

Mar 26 2017 6:03 AM UTC

}// 124/140

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u/Lazy1337

#quine

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donbright

remix of d/1816 by u/SpecialAgent

function u(t) {

t?Δ=[]:P=[99,0,0,0,1,0,0,.6]
for(Q=i=4;i--;)Q+=(Δ[i]=P[(2+i)%4]-P[i])**2/2
for(j=4;j--;)x.fillRect(P[i=j*2],P[i+1],2,2),P[j]+=P[j+4]+=Δ[j]/Q

Mar 24 2017 11:16 PM UTC

}// 140/140

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Quickstart - alter numbers in P for fun patterns. Long description - this is a simulation of two body gravitational motion using a simplified form of Calculus.

u/donbright

combine F=ma with F=GM1M2/R^2 except that G=1, M1=1, M2=1 and r^2 is r
u/donbright

Explanation here https://www.patreon.com/posts/simulating-in-…
u/donbright

oh btw P[x1,y1,x2,y2,xv1,yv1,xv1,yv2] where 1,2 = object 1,2, x,y=position, v = velocity initial
u/codeslaw

This is incredible!
u/donbright

#physics

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aemkei

remix of d/2238 by u/aemkei

function u(t) {

r=500;c.width^=0;for(I=F=2;F>-2;F-=1/2e3)x.fillRect(C(F)*S(L=F*r-t)*r+999,S(F)*r+520,W=(20&((S(I+=.25032)*50)*C(.1+I/1000)*.7))*C(L/2),W)

Mar 21 2017 10:36 PM UTC

}// 137/140

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the world …

u/sfz

you are a god.min.js
u/sigveseb

well done!
u/iverjo

#sphere #earth #globe
u/vain

What?? top ++++

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