Dweets awesomed by u/trupples

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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pavel

remix of d/12230 by u/pavel

function u(t) {

for(c.width|=p=2*Math.PI,x.scale(9,9),i=13;j=i--*p/6;x.arc(107+45*C(A=j-t/4+i*p/12),60+45*S(A),14,a=(t+j)%p,a));x.stroke()

Feb 8 2019 8:33 PM UTC

}// 122/140

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I like how the corners are "walking"

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pavel

remix of d/9294 by u/cantelope

function u(t) {

for(i=w=c.width|=q=6.2832;i--;x.arc(960+S(p=(i>>1)*q/9-t)/Z*w,540+C(p)/Z*w,Z*Z,a=-t%q,a))Z=2+(i-1&-2)%98-8*t%2,i%98||x.beginPath(x.stroke())

Feb 6 2019 2:02 AM UTC

}// 140/140

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#uncompressed

u/cantelope

gotta hand it to you 👏
u/pavel

Playing it safe on the arc angle, modding it by 2pi just to avoid the bug on Safari.

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rodrigo.siqueira

function u(t) {

X=Y=0
for(c.width|=i=1e3;i--;){
X=X*C(2*t+Y*2)+Y/4
Y=C(X+Y+X+t/3)-S(i+X+t)/3
x.fillRect(960+X*820,540+Y*400,5,5)
}

Feb 4 2019 2:16 AM UTC

}// 114/140

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Interaction of live attractors

u/katkip

WOWWW #attractor AWESOME
u/donbright

WOAH

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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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13thptr

function u(t) {

c.width=w=400;x.fillText(x.font=m="17px Hello",0,19)
x.getImageData(0,0,w,j=99).data.map((e,i)=>e&&x.fillRect(j*C(i%w*.016-t)+j,i/w,3,3))

Dec 28 2018 11:13 AM UTC

}// 137/140

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Somewhat ambiguous because of implicit orthographic projection

u/13thptr

(first dweet :D)
u/13thptr

add |0 after i/w for a more solid look
u/lionleaf

Nice! Glad to see you make a first dweet :D
u/jylikangas

Welcome! Very nice 1st Dweet! Golfed to 131b -> c.width=w=400; with(x)getImageData(fillText(font="17px Hello",0,19),0,w,j=99).data.map((e,i)=>e&&fillRect(j*C(i%w/63-t)+j,i/w,3,3))
u/13thptr

thanks for the nice comments ! u/jylikangas cool tricks but it seems like inlining fillText in getImageData won't work in FF :(

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ellisk1

function u(t) {

with(x)for(m=q=t*30|0;m-->q-99;fill(arc(960+(r=m**.5*20*C(m))*S(a=m**3),540+r*C(a),w,0,7)))beginPath(fillStyle=R((w=q-m)*2,0,0,1/w**1.48))

Dec 28 2018 1:29 AM UTC

}// 138/140

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VIRUS

u/katkip

#virus I hope this will not aggravate my cold.
u/BirdsTweetCodersDweet

:O

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rodrigo.siqueira

function u(t) {

c.width^=0
x.fillRect(0,0,2e3,2e3)
k=t<3?80*t:240
x.fillStyle="#5e9"
for(i=1;i<=k;i=i+.2)x.fillRect(3e3*(i%1)+i*S(i+t)-k,k+i*3*C(i/600),5,9)

Dec 27 2018 3:18 PM UTC

}// 140/140

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Rotating Trees #christmas #tree

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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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echo85

function u(t) {

for(s=300,r=4/s,j=60*t*r-2,i=-2;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*X<9&&x.fillRect(i*s+4*s,j*s+2*s,4,4)}

Dec 26 2018 9:54 PM UTC

}// 128/140

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mandelbrot set

u/katkip

nice #mandelbrot #fractal

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rodrigo.siqueira

function u(t) {

F=n=>(f=(n,t=n&&f(n-1),r=t[0])=>n?[r+r+r,...t.map(x=>x+t[n]+x)]:['█','░'],f=f(n),f.pop(),f).join`\n`
throw(F(3))

Dec 24 2018 10:15 PM UTC

}// 112/140

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Cantor Set #fractal #unicode

u/katkip

haha nice

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