Dweets awesomed by u/sigveseb

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: #Food

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pavel

remix of d/12693 by u/danny@hille.dk

function u(t) {

for(i=c.width|=p=240;i--;e>0&&x.fillRect(q+i%5*500,i-p,e,20))q=S(a=3*S(t/2)+i*.3146)*p,e=C(a)*p-q,x.fillStyle=`hsl(${i*90},99%,${8*e**.3}%`

Mar 9 2019 3:54 AM UTC

}// 139/140

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u/katkip

This looks so much like a WebGL dweet but it isn't.
u/joeytwiddle

#twister

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rnbw

function u(t) {

c.width=700
x.fillStyle=`#d94`
for(i=-4;i++<53;)for(j=(i+S(t/3+i/3)*10-30);j++<13;)x.fillRect(i*30-30+S(t/3+j)*50,j*30,40,16)

Mar 8 2019 7:29 PM UTC

}// 125/140

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odd... stripes? can i CALL them that??

u/Xen

nicely done
u/katkip

So smooth! :D

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pavel

remix of d/1112 by u/sigveseb

function u(t) {

for(let w=c.width=127,i=9086,a,b,n,B;a=i&w,b=i--/w;x.fillRect(a,b,1,1/(t+a/n&1^b/n)))n=b-20,B=(w*S(t*9+n/9)+(a-40)**2+n*n)/1e3,n*=B>1||C(B)

Mar 7 2019 8:31 PM UTC

}// 139/140

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#improved performance

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u/pavel

Original runs at 6fps on my machines this runs at 60fps. I lowered the resolution by a quarter (4x perf) and golfed 13 chars to let me declare all vars locally (2x perf).
u/tomxor

wow! this is a massive perf improvement, the original was impressive but I couldn't really see it realtime. Nice one :)
u/katkip

how
u/nender

Wow! This is amazing!
u/sigveseb

Nice!
u/f8f82804

#raytrace #d3 #pbr
u/Cloud

Cool!!!

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oddgoo

function u(t) {

c.width=1e3;l=255
for(i=470;i>S(t);i--)for(j=0;j<3;j++){x.fillStyle=R(j*l/2,l-j*l,j*l/4);x.fillRect(i*2,S((i+t*59)/30)%(S(t))*l+l+j*9,20,9)}

Mar 6 2019 9:51 PM UTC

}// 140/140

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Sour Waves

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katkip

function u(t) {

t||(X=y=1)
f=x=>C(x)*S(x)*x/92+S(x*3.1416)/6
for(i=999;i--;)x.fillRect(960+X*20,540+y*20,10,10),y+=f(X),X+=f(y)

Mar 6 2019 4:35 PM UTC

}// 111/140

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Create your own chaotic #attractor curves #application modify f=x=

u/katkip

Beautiful #math
u/tomxor

I found a moose! :P f=x=>C(x)*T(x)*x/24+S(x/4)+C(x/8)
u/rep_movsd

#underrated

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pavel

function u(t) {

eval(unescape(escape`景爨樽㈲㭱㵃⡶㵪ⴭ⼸⤬爽㌰〫ㄵ〪焬稽匨瘩㬩景爨椽ㄱ㐻甽椭⴯ㄸ㭸⹦楬汒散琨㤴㜫爪䌨甩ⰵ㈸⭲⩓⡵⤬㈵ⰲ㔩⥦㴲⩺⨨焪䌨甩⩓⡴⤫稪䌨琩⤭䌨琩ⱸ⹦楬汓瑹汥㵒⡧㵦⩦⨲㔶ⱧⱧ⬲〪昩;`.replace(/u(..)/g,"$1%")))

Mar 5 2019 2:07 AM UTC

}// 132/140

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Two-color phong specular shaded torus

u/pavel

166 for(j=22;q=C(v=j--/8),r=300+150*q,z=S(v);)for(i=114;u=i--/18;x.fillRect(947+r*C(u),528+r*S(u),25,25))f=2*z*(q*C(u)*S(t)+z*C(t))-C(t),x.fillStyle=R(g=f*f*256,g,g+20*f)
u/tomxor

Nice #shading #torus
u/f8f82804

#d3 #phong

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Nexrem

function u(t) {

c.width^=0;e=Math.floor;z=950;for(i=0;i<2000;i++){x.moveTo(z+C(i)*z,540+S(i*e(t))*540);x.lineTo(z+C(i+1)*z,540+S((i+1)*e(t))*540)}x.stroke()

Mar 5 2019 12:17 AM UTC

}// 140/140

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u/lionleaf

Nice one! Welcome to Dwitter :)
u/rodrigo.siqueira

Same result with just 77 characters, using ~~ instead of Math.floor; No need to x.moveTo; c.width can be together with other elements to avoid "0" in "^=0" and other shortcuts: for(c.width^=i=0;i<2e3;i++)x.lineTo(950+C(i)*950,540+S(i*~~t)*540);x.stroke()
u/Xen

Love it

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marc8

function u(t) {

c.width=w=360;i=0
r=_=>Math.random()*256
while(i<=w){x.fillStyle=i<w?R(r(),r(),r()):"#43A"
x.fillRect(0,i,w,i+=2)}x.fillRect(40,20,280,160)

Mar 4 2019 10:51 PM UTC

}// 139/140

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Still loading

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u/tomxor

Oh crap :D it all came flooding back, now i gota go play llamatron
u/tomxor

#retro #amiga
u/tomxor

I love this, we need more retro!
u/tomxor

I did the atari loading bee :P d/12717
u/Jezza

I love this!
u/marc8

#c64
u/UEZ

#decruncher

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pavel

remix of d/701 by u/sigveseb

function u(t) {

for(x[f='fillRect'](i=8,0,2e3,2e3);w=3*i--;)for(x.fillStyle=R(s=666/i,s/2,s/4),k=w*w;b=k--/w|0;a+b&1&&x[f]((a-t%2)*s,(b-2+S(t))*s,s,s))a=k%w

Mar 4 2019 8:47 PM UTC

}// 140/140

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More layers and a black background #improved

u/sigveseb

Nice!

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katkip

function u(t) {

f=(X,Y,s)=>{x.fillRect(X+S(s+t)*(s+t),Y+C(s+t)*(s+t),s/59,s/59);if(s>1)f(X+S(s)*s*t/2,Y+C(s)*s*t/4,s-1)}
f(1590,750,150)

Mar 3 2019 7:15 PM UTC

}// 120/140

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Awesome abstract wallpaper #recursive

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