Dweets awesomed by u/yokljo

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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gho.xlrtx@gmail.com

function u(t) {

t||(X=960,Y=540,D=10,F=J=Q=0,N=1)
if(J>2*F)F+=1,Q=F%2?-1:1,J=1
J>F?Y+=D*Q:X-=D*Q
for(I=2;I<N&&N%I!=0;I++);
I==N&&x.fillRect(X,Y,D,D)
J++
N++

Sep 18 2018 8:40 AM UTC

}// 140/140

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Ulam Spiral && Patterns in Prime Numbers

u/katkip

awesome
u/f8f82804

Impressive! #math #waitforit
u/donbright

!!!!!!!!!!!!!!!!!!!!!

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jylikangas

function u(t) {

with(x)for(i=70;i--;fillStyle=R(fill(),i*3),beginPath())ellipse(X=i**5%3e3,Y=S(i)*950+C(t+i)*9,r=i>68?6e3:Y*Y/5e3+i,r/3,0,i,i+6),lineTo(X,Y)

Sep 13 2018 5:41 PM UTC

}// 140/140

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Waterlily lake

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u/magna

Great!
u/joeytwiddle

So nice. #water #organic #scene
u/kipkat

#cute
u/Xen

Very clever
u/DataMeta

Peaceful
u/magna

🐸

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Agnes

remix of d/9653 by u/Agnes

function u(t) {

A=a=>a*Math.random();for(P='M960 540',i=Q=255;i--;P+='t'+(20-A(40))+' '+(20-A(40)));x.strokeStyle='#'+(A(1000)|0),x.stroke(new Path2D(P))

Sep 10 2018 10:18 PM UTC

}// 137/140

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Violent brush strokes

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f8f82804

remix of d/9746 by u/f8f82804

function u(t) {

eval(unescape(escape`睩瑨⡸⥧汯扡汁汰桡㴮〱ⱦ楬汒散琨愽ⴱ攳ⱡⱡ㴲攳ⱡ⤬砮氽瑲慮獬慴攬氨琿〺㤶〬㘪匨琩⤬爽弽㹲潴慴攨㐩ⱦ㵤㴾搭ⴿ獡癥⠩♲⡬⠰ⰹ㤩⤦爨昨搩⤦牥獴潲攨昨搩⤺捬敡牒散琨〬㤹⩓⡴┱⨲⤬㤬㤩㭦⡴☷⤻`.replace(/u(..)/g,"$1%")))

Sep 10 2018 10:13 PM UTC

}// 139/140

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#fireworks #trails #abstract #compressed

u/donbright

yeah!!!!!

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ellisk1

function u(t) {

for(c.width|=i=1;i<49;i++)x.fillStyle=R(z=255-5*i,z,z),x.font='3cm n',x.fillText(i%12+1,1e3+350*S(i/1.9+t)+9*T(i+t),600-350*C(i/1.9+t))

Sep 10 2018 6:56 PM UTC

}// 135/140

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Time flies

u/donbright

this is wonderful
u/aleamb

amazing!

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DataMeta

function u(t) {

c.width|=i=768;x.transform(1,0,0,1,960,540)
for(i;i--;x.rotate(t/64))x.fillRect(i,i,i/8,i)

Sep 9 2018 4:12 AM UTC

}// 90/140

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u/katkip

idk why but this was satisfying
u/f8f82804

#waitforit
u/rep_movsd

Hypnotic

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f8f82804

remix of d/9676 by u/f8f82804

function u(t) {

eval(unescape(escape`景爨椽挮睩摴桞㴰㭩ⴭ㭸⹢敧楮偡瑨⡸⹦楬氨⤩⥃⡡㵴⵩⤾〦♸⹥汬楰獥⠹㘰⬨堽⡩⨹㘰⵩⩩⤪⨮㔪匨愩⤬㘰⭩Ⱘ猽㈵⴨匨愭ㄩ⨨戽⠱⴨⡙㵩ⴴ㠰⤯㐸〩⨪㈩⨪⸵⤩⨪㐪㈴⤪䌨愩⩢ⱳⱍ慴栮慴慮⡙⽘⤬〬㜩`.replace(/u(..)/g,"$1%")))

Sep 5 2018 8:57 PM UTC

}// 138/140

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#specular #d3 #sphere #animated #compressed

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u/f8f82804

for(i=c.width^=0;i--;x.beginPath(x.fill()))C(a=t-i)>0&&x.ellipse(960+(X=(i*960-i*i)**.5*S(a)),60+i,(s=25-(S(a-1)*(b=(1-((Y=i-480)/480)**2)**.5))**4*24)*C(a)*b,s,Math.atan(Y/X),0,7)
u/joeytwiddle

I like how the circles become ellipses at the edges. https://codegolf.tk/a/254
u/magna

WHOA
u/f8f82804

u/joeytwiddle: that's the whole point of this demo, the lighting is just there because I had to compress it and had leftover space
u/f8f82804

you can see this concept implemented without compression in d/9676
u/iverjo

Very nice!
u/f8f82804

#fullhd

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yonatan

remix of d/9666 by u/joeytwiddle

function u(t) {

for(x[f='fillRect'](0,0,c.width=99,j=299);q=j--/9;x[f](50+C(i)*s*6,26+C(i*8)*s,s,s))x.shadowColor=R(j,i=j*j/1e4+t,99),s=99/q,x.shadowBlur=q

Sep 5 2018 6:59 PM UTC

}// 139/140

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Smokey 3D structure with joey's shadows

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u/sigveseb

Way amazing!
u/cantelope

epic!
u/donbright

O M G
u/donbright

this is .. is this even real or am i dreaming?
u/joeytwiddle

Wow! The 3D looks real, but the scene is dreamlike. #d3
u/aleamb

amazing
u/iverjo

So good!
u/joeytwiddle

#glow

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cantelope

function u(t) {

eval(unescape(escape`景爨倽孛⡣⹷楤瑨簽樽㤩⼲ⰴ㐰嵝㬫⭪㰸〻倮浡瀨焽㹻景爨椽㌻椭ⴻℨ漭ㄹ⤦♐⹰畳栨存ⱙ崩⥳㴳攴⽪⽪Ɽ㵯⩳ⱸ⹦楬汒散琨堽煛そ⭓⡰㵩⼮㐸⭯⩓⡴⤯㠭匨琩⨲⸳㘩⩤⵳⼲ⱙ㵱嬱崫䌨瀩⩤⵳⼲ⱳⱳ⥽⤩漽樥㈰`.replace(/u(..)/g,"$1%")))

Sep 3 2018 7:14 PM UTC

}// 140/140

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https://dweet.net/285/9651

u/katkip

That's awesome
u/donbright

woah
u/donbright

woah
u/katkip

#fractal

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yonatan

remix of d/1829 by u/New_Core

function u(t) {

eval(unescape(escape`挮睩摴栽ⴱ㭦潲⡪㴲攳㭪ⴭ㭸⹦楬汒散琨含㔰⩓⡴⭡⤫唪䄫嘪䈬含㤪䌨琫愩⭖⩁ⵕ⩂ⰳⰹ⤩䈽㤪匨愽樯ㄲ㔰⤪匨権ⱁ㴨㈵⩓⠭愪㔩⬲㔩⩃⡪⤬唽匨爽匨琩⼲⤬砮晩汬却祬攽刨焽⡪☱㈸⤭䌨爫権⩔ⱖ㵃⡲⤬吽㤹⤻`.replace(/u(..)/g,"$1%")))

Sep 3 2018 3:06 PM UTC

}// 140/140

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c.width=-1;for(j=2e3;j--;x.fillRect(T+50*S(t+a)+U*A+V*B,T+9*C(t+a)+V*A-U*B,3,9))B=9*S(a=j/1250)*S(j),A=(25*S(-a*5)+25)*C(j),U=S(r=S(t)/2),x.fillStyle=R(q=(j&128)-C(r+j)*T,V=C(r),T=99);

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u/sigveseb

Oohhh nice remix. I always say it as the fish was swimming out of the screen towards the viewer ^^
u/sigveseb

Saw it*
u/yonatan

Me too, but the face is harder to render convincingly ;)
u/yonatan

You can try it: c.width=-1;for(j=2e3;j--;x.fillRect(99+9*S(a=j/1250)*S(j)+50*S(m=t*3+a),75+25*(S(-a*5)+1)*C(j),3,7))x.fillStyle=R(q=(j&128)-C(j)**3*99,q,q)
u/magna

Very tropical
u/yonatan

sorry, wrong code, I meant c.width=-1;for(j=0;j++<2e3;x.fillRect(99+9*S(a=j/1250)*S(j)+50*S(m=t*3+a),75+25*(S(-a*5)+1)*C(j),3,7))x.fillStyle=R(q=(j&128)-C(j)**3*99,q,q)
u/donbright

dude...

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