Dweets awesomed by u/andregn

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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rodrigo.siqueira

remix of d/12287 by u/rodrigo.siqueira

function u(t) {

c.width|=X=Y=Z=6;for(i=2e3;i--;)X+=.1*(Y-X),Y+=.01*(X*(29-Z)-Y),
Z+=.01*(X*Y-1.6*Z),x.fillRect(960+X*30+Y*C(t*45)*9,2e3-999*t%2e3-Z*22,8,9)

Feb 13 2019 12:50 AM UTC

}// 139/140

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Lorenz, the Butterfly. #attractor #lorenz

u/joeytwiddle

:-D
u/sigveseb

Haha nice one :)

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rodrigo.siqueira

remix of d/11965 by u/pavel

function u(t) {

for(x.fillRect(0,0,i=3e3,i);Q=S(--i*i);x.clearRect(960+150*(S(b)*4+S(i+t)*Q),540+150*(C(i*i)-(t%4>2?T(b+t):S(b+t))),4,4))b=i%6+t+(t%2>1?0:i)

Jan 28 2019 2:40 PM UTC

}// 140/140

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Torus, spheres, flow and bubbles

Show more comments…
u/rnbw

now THIS is a demo!
u/katkip

Yeah he win
u/13thptr

woah
u/joeytwiddle

Superb! Golf the end with i*(t%2>1) or i*!(t&1)
u/rodrigo.siqueira

Thanks @joeytwiddle for the golf trick. i*(t&1) also works and it's even shorter. And I found that t%4>2?... can be converted to t&2?... It works as a counter to change the function each 2 seconds.
u/yonatan

Also, since T and S take the same arguments (t%4>2?T(b+t):S(b+t)) can be (t&2?T:S)(b+t)
u/lionleaf

Wow! Now we're talking
u/vain

Wow, three fx in this tiny code? Great!

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rodrigo.siqueira

remix of d/11562 by u/echo85

function u(t) {

for(s=300,r=5/s,j=60*t*r-2,i=-3;i<2;i+=r)for(X=i,Y=j,T=9;T--;)U=X,X=X*X-Y*Y+i,Y=2*U*Y+j,x.fillStyle=R(Y,U,X),x.fillRect(i*s+4*s,j*s+2*s,5,5)

Dec 27 2018 2:02 AM UTC

}// 140/140

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Color Mandelbrot Set

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andregn

remix of d/11066 by u/rodrigo.siqueira

function u(t) {

m=255;with(x)for(i=24;--i;fill())for(beginPath(n=k=i+3);k--;arc(4*m,2*m,50*i,a=22/7*(4*k+t)/(n-1),a))fillStyle=R(a=C(t*i)*m,a*S(t*4),a*C(t))

Nov 22 2018 11:30 PM UTC

}// 140/140

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u/sigveseb

Super fresh!

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andregn

remix of d/10855 by u/rodrigo.siqueira

function u(t) {

c.width=i=w=300,
x.font='3em"',x.fillText('🛸',a=w/3-C(t)*88,60-20*S(2*t)),x.fillText('🐄',w/3+S(t)*88,w/2)

Nov 21 2018 11:39 PM UTC

}// 105/140

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Abduction Chase #emoji

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ellisk1

function u(t) {

q=t+20;for(c.width=i=2e3;i--;)x.fillRect(1e3+500*S(a=(q-=.01)+t/9),1280-210*Math.abs(S(q*3.75))+34*(t-q),w=15+5*C(a),w)

Nov 21 2018 6:43 PM UTC

}// 119/140

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Bouncer #beesandbombs

u/aleamb

fucking awesome!

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pavel

function u(t) {

with(x)for(i=c.width=300;i--;stroke())for(beginPath(k=6);k--;arc(150,84,84>>k,a=(i%16+b*k)*.39,a))strokeStyle=R(0,0,b=1-(i>>4)+t%1,1-b**2/4)

Nov 20 2018 4:03 AM UTC

}// 140/140

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Occult Star (#beesandbombs inspired)

u/erin

if shepards tone was a shape

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rodrigo.siqueira

remix of d/11063 by u/pavel

function u(t) {

with(x)for(i=24;--i;fill())for(beginPath(n=k=i+2);k--;arc(960,540,50*i,a=3.14*(4*k+t)/(n),a))fillStyle=R(a=(1-i/9)*300,a*S(t),a*C(t/2))

Nov 19 2018 1:37 AM UTC

}// 135/140

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Polygon Polycolor

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pavel

function u(t) {

with(x)for(i=24;--i;fill())for(beginPath(n=k=i+2);k--;arc(960,540,i==2?70:50*i,a=Math.PI*(2*k+t)/(n-1),a))fillStyle=R(a=(1-i/23)**2*300,a,a)

Nov 18 2018 10:45 PM UTC

}// 140/140

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Polygons #beesandbombs

u/andregn

You could consider Math.PI = 22/7
u/pavel

When I have chars left I sometimes write out the full precision constants.

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rodrigo.siqueira

remix of d/11008 by u/rnbw

function u(t) {

c.width^=0;x.fillStyle='#137';for(j=0;j<19;j++)for(i=0;i<22;i++){x.beginPath(x.fill(x.arc(99*i+24,90*j,S(j*i+t*9)*9+39,0,7)))}

Nov 17 2018 4:22 AM UTC

}// 126/140

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Hypnoballs

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