Dweets awesomed by u/mohd-akram

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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pavel

function u(t) {

for(c.width|=i=1e3;i--;x.fill(p=new Path2D,p.arc(960+380*C(a=t+i/222)+r*C(11*a),540+380*S(a)+r*S(11*a),r<1||r**.5,0,7)))r=i*i/7e3

Dec 2 2018 8:21 AM UTC

}// 129/140

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Swirler #beesandbombs

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pavel

remix of d/11192 by u/pavel

function u(t) {

for(k=c.width|=w=120;i=k-->>6;x.rect(--j*w+o(t),(i-2)*w+o(t-1.6),s=k%2?j+i&1&&w:60,s))j=k/2&31,o=n=>k%2*w/(2+1e9**C(n))
x.fill('evenodd')

Nov 30 2018 2:37 AM UTC

}// 137/140

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pavel

function u(t) {

for(c.width|=i=5,x.scale(9,9);i--;)x.stroke(new Path2D(`m${107+i*S(t)},${90+i},`+'40004080884826224048884808004062'.split``.map(n=>5*n-20)))

Nov 29 2018 9:05 AM UTC

}// 140/140

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Cool S

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u/lionleaf

#S
u/magna

Just 2 chars shorter than '40004080884826224048884808004062': btoa("ãM4ãO4óÎ<Û¶ãN<óÎ<ÓÍ4ãN¶")
u/magna

(Or even shorter as a template literal
u/magna

(Or even shorter as a template literal
u/magna

(Or even shorter as a template literal
u/magna

(Or even shorter as a template literal
u/magna

(Or even shorter as a template literal
u/magna

OMFG. I was holding a sandwich and typing with the same hand. And that happened ^
u/13thptr

#path2d

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pavel

function u(t) {

for(i=c.width|=0;j=i-->>5;x.arc(98*(28-k*63+i%32*(4*k-2)+(j|t)%2+t%1/2+(.5-j%2)/(1+9e9**(j/9-t%1))),(j-k)*170,98,3*!k,3*k))k=i>>4&1
x.fill()

Nov 29 2018 12:18 AM UTC

}// 140/140

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MORE disks >:) #beesandbombs

u/anotherkitten

stop being so good
u/katkip

i love your beesandbombs dweets
u/pavel

I call fill just once, the black bits are a single connected shape that zig-zags, the messy edges are hidden offscreen.
u/pavel

I use 1/(1+9e9**x) to smooth step but even rows step twice in one cycle which is done by adding (j|t)%2 as offset.
u/pavel

In hindsight ~~x+(x%1)**9 is better for multi-smooth-step animations.

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pavel

function u(t) {

for(k=c.width|=w=120;k--;x.rect(j*w+o(t),i*w+o(t-1.6),s=k%2?60:j+i&1&&w,s))i=k>>6,j=k/2&31,o=n=>k%2*w/(2+9e9**C(n-k/1e3))
x.fill('evenodd')

Nov 28 2018 8:17 PM UTC

}// 139/140

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Chessboard Stairs #beesandbombs (simplified)

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u/jylikangas

Another very clever implementation!
u/katkip

This game me a headache
u/katkip

This game me a headache. Nice
u/metamero

great dwitter! [as always] ... why this is so much slower on phone (android)?
u/metamero

great dwitter! [as always] ... why this is so much slower on phone (android)?
u/pavel

It is a bug in the website. I'll see if I can fix it.

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pavel

function u(t) {

with(x)for(c.width|=k=320,scale(9,9);--k;arc(107,60,16*(k>>5)+16/(1+1e5**(.5+k%2-t%2)),a=(t/2-k)%11*.571,a))k%2&&beginPath(stroke())

Nov 26 2018 7:23 PM UTC

}// 132/140

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Walking Spiral #beesandbombs

u/pavel

Using scale(9,9) to get thick lines and shave some digits from coordinate numbers (e.g. 60 vs 540 for height)
u/pavel

x.arc(X,Y,r,a,a) = x.lineTo(X+r*C(a),Y+r*S(a))
u/katkip

Duuude
u/katkip

Awesomeee

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pavel

function u(t) {

for(i=c.width|=0;Y=i-->>6;x.fill(x.arc(((i&62)-Y)*48-o*C(A=~~t/.9549),(Y-2)*83-o*S(A),30,A,A-3,i%2)))x.beginPath(o=i%2*96/(1+1e9**(.5-t%1)))

Nov 25 2018 5:45 AM UTC

}// 140/140

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Sliced Dots #beesandbombs

u/pavel

Golfed 3 loops into one. Lowest bit of i determines half-circle, next 5 bits determine X and the rest determine Y
u/pavel

i&62 = (i>>1)%32*2 = X*2
u/jylikangas

There's a lot of really clever tricks in your dweets. Keep them coming! :)
u/katkip

wow

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pavel

function u(t) {

for(c.width=i=300;j=--i>>1;x.fillText('⚫⚪'[k],29*j-8*s,84+(k*25-1)*Math.tanh(5*S(a))))k=i&1^C(a=j/3-2*t)>0,x.font=(s=1+C(k*a/2)**2)*12+'px"'

Nov 23 2018 8:40 AM UTC

}// 140/140

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Twister #beesandbombs

u/pavel

Getting the white to go over the front but behind the back is so hard! Had to use emojis to save bytes but its janky on some devices.

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pavel

remix of d/11126 by u/pavel

function u(t) {

for(c.width|=j=22+(w=t&2)/2;--j;)for(i=8;i--;x.arc(960,540,i&&70*(j-p),a=(i+p-p*w)*355/339,a))p=1/(1+2**(j+6-t%2*16));x.fill('evenodd')

Nov 23 2018 6:17 AM UTC

}// 135/140

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pavel

function u(t) {

with(x)for(j=9;--j;)for(i=2<<j,f=6.28/i;i--;fill())for(beginPath(k=2);k--;fillStyle=i%2?'#fff':R())arc(960,540,k*190*j**.5,a=(i+t%2)*f,a+f)

Nov 23 2018 4:55 AM UTC

}// 139/140

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Black and white spinners #beesandbombs

u/katkip

1.5 dimension fidget spinner
u/BackendForth

Looks like a rotary encoder.

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