Dweets awesomed by u/cucumberOwl

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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magna

remix of d/2758 by u/magna

function u(t) {

x.globalCompositeOperation='xor';s=2**.5;H=500;d=(S(t/3)+1)/2*H;w=H-d;x.beginPath();x.arc(C(t)*d+H*2,S(t)*d+H,w,0,7);x.fill()

May 22 2017 3:01 AM UTC

}// 125/140

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u/MrM@_S

xor swap
u/donbright

really nice, my favorite of this series. i notice the 'circles and squares' fractal / pseudofractal shows up a lot in this one, Moire style patterns. the symmetry is really cool too

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magna

remix of d/2757 by u/magna

function u(t) {

x.globalCompositeOperation='xor';s=2**.5;H=500;r=Math.random;d=r()*H;w=H-d;x.beginPath();x.arc(C(a=r()*7)*d+H*2,S(a)*d+H,w,0,7);x.fill()

May 22 2017 12:39 AM UTC

}// 136/140

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magna

function u(t) {

x.globalCompositeOperation='xor';s=2**.5;H=500;r=Math.random;d=r()*H;w=H-d;x.fillRect(C(a=r()*7)*d+H*2-w/s,Y=S(a)*d+H-w/s,v=w*s,v)

May 22 2017 12:15 AM UTC

}// 130/140

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u/joeytwiddle

Squaring the circle?

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New_Core

function u(t) {

t?c.width|=0:d=a=1;a<0?a=0:a-=.1;d<5?a=20:0;x.ellipse(960,840-(d=Math.abs(500*S(t))),a*S(t*9)+200,a*C(t*9)+200,0,0,7);x.fill();

May 21 2017 3:45 PM UTC

}// 127/140

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not that exciting, would been nicer if it went bouncing on the walls also ;)

Show more comments…
u/donbright

maybe something like this?: t?c.width=199:(ẏ=a=ẋ=1,y=X=12);y+=ẏ+=.12;ẏ*=y>99?a=-1:1;X+=ẋ*=X>179|X<12?-1:1;a*=.98;x.ellipse(X,y,4*a*C(ẏ)+9,4*a*S(ẏ)+9,0,0,7);x.fill()
u/New_Core

was thinking like this (but this is to long) t?c.width|=0:e=f=d=a=1;a<0?a=0:a-=.2;d<5?a=20:0;b>1700?(f-=5,a=20):0;b<200?(f+=5,a=20):0;e+=f;x.ellipse(b=960+e,840-(d=Math.abs(500*S(t))),a*S(t*9)+200,a*C(t*9)+200,0,0,7);x.fill();
u/New_Core

(noticed b was not defined.. put b= infront e in start)
u/joeytwiddle

A lot of chars for a little change: t?c.width|=0:d=a=y=F=T=0;l=t-T+.087;y+=9*a;a-=.01;y<-28?(F||(F=T=t),l=.087+(t-T)/2,y=-28,b=40,l>.43?(a=1,y=28,F=0,T+=(t-T)/2):u):b=20*a+20;h=-b*S(l*9);x.ellipse(960,840-y-(y>0?0:h),200+b*S(l*9),200+h,0,0,7);x.fill()
u/donbright

lol @joeytwiddle it looks like it's sentient doing jumping jacks
u/joeytwiddle

#bounce
u/joeytwiddle

20 months later, I got it bouncing off the walls, but not wobbling, in the remix

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the_yuhanna

function u(t) {

x.fillStyle=`hsl(${3*t},30%,50%)`
x.rotate(t/3*Math.PI)
x.fillRect(2,4,5,2e6)
x.setTransform(1,5,0,7,S(t)*2e2,C(t)*1e1)
x.translate(500,500)

May 21 2017 7:16 AM UTC

}// 140/140

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Beginner

function u(t) {

c.width|=1;x.translate(960,540);for(i=15;i--;x.rotate(t*.3))x.rect(a=-90-i*20+90*S(t),t,-a,a*2);x.fill('evenodd')
/*Original by New_Core*/

May 19 2017 6:28 PM UTC

}// 138/140

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Remake of New_Core

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joeytwiddle

function u(t) {

r=Math.random
t%10<.3&&(c.width|=0,U=r(),V=r())
x.beginPath()
k=p=>1+S(p*t)
x.ellipse(960+300*S(t),540,300*k(U),200*k(V),t,0,7)
x.stroke()

May 19 2017 4:25 AM UTC

}// 138/140

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Popped in to debug an ellipse for work. Felt rude not to leave a dweet.

u/jick

Oh, neat periodic clear trick.
u/joeytwiddle

I found that trick in a random dweet I saw recently. No idea which one.

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New_Core

function u(t) {

c.width|=0;x.translate(960,540);for(i=20;i--;x.rotate(t*.1))x.rect(a=-100-i*15+100*S(t+i/5),a,-a*2,-a*2);x.fill('evenodd')

May 18 2017 8:02 AM UTC

}// 122/140

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u/donbright

excellent
u/lionleaf

woah!
u/Xen

nice :)

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nystrand

remix of d/2727 by u/joeytwiddle

function u(t) {

c.width|=p=(X,Y=X,S=X,D=15,r=_=>C(t+=S++),k=_=>p(X+S*r(),Y+S*r()/3,S*.8,D-1))=>D&&x.fillRect(X,Y,S,S,x.fillStyle=R(k(),k(),S*D,.01));p(580)

May 16 2017 12:19 PM UTC

}// 139/140

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u/yonatan

#clouds

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nystrand

remix of d/2727 by u/joeytwiddle

function u(t) {

c.width|=p=(X,Y=X,S=X,D=16,r=_=>C(t+=S*D+t/8e6),k=_=>p(X+S*r(),Y+S*r()/3,S*.8,D-1))=>D&&x.fillRect(X,Y,S,S,x.globalAlpha=.01)&k()&k();p(580)

May 16 2017 10:12 AM UTC

}// 140/140

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u/joeytwiddle

Thank you for this :)
u/magna

WOW
u/donbright

damn
u/joeytwiddle

I learned 5 different tricks from your golfing here!
u/iverjo

#clouds
u/jdspugh

Amazing!

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