Dweets awesomed by u/sop

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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yonatan

function u(t) {

t?T=f=>130+f(i)*i%9+f(i*i)*i**.4*t:c.width=568
for(i=5e3;t<4&&i--;x.fillRect(T(S),T(C)+t*t*2,1/t,1))x.fillStyle=`hsl(98 60%${t*13-T(C)/8}%`

Sep 11 2018 11:12 PM UTC

}// 139/140

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Marimo - a remake of tail_y's http://wa.zozuar.org/code.php?c=md93

u/yonatan

#organic #grass #waitforit
u/donbright

incredible
u/joeytwiddle

Hairy! Set c.width=250 to zoom in
u/kipkat

Looks like a #fireworks for me

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Xen

function u(t) {

x.beginPath(Z=250),x.arc(9e2+C(t+t*C(t/Z)+t*Z)*Z,5e2+S(t+t*C(t/Z)+t*Z)*Z,Z,0,7),x.stroke(),x.strokeStyle=R(z=t*Z%Z,Z*T(z),Z-z,.5)

May 17 2018 6:42 PM UTC

}// 129/140

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GeorgesAbitbol

function u(t) {

for(j=0;j<6;j++)
for(i=1;i<7;i++)
x.fillRect(958+80*S((j+i)*t)+170*(i-3.5),170*(j-2.5)+538+80*S((j+(i+1))*t),4,4)

May 16 2018 9:03 PM UTC

}// 113/140

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u/Xen

Love it!
u/hollo47

Beautiful!
u/fujimotos

See the hashtag #multi_dweet for the similar dweets

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nix

function u(t) {

for(w=i=c.width=1920;i>=0;i--){x.fillRect(S(2*t)+w/4*C(t/2+i)+w/2,((w/(1+(T(.2+S(i+t)/i*t))*40)))*S(i+t)+500,(25*(S(i+t))),w/50*(C(t+i))
)}

May 15 2018 10:04 PM UTC

}// 139/140

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u/magna

Wild!
u/aleamb

epic!
u/nix

Thanks! ^_^

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jylikangas

function u(t) {

for(x.fillRect(0,i=-9,W=2e3,W);++i-9;)for(j=28;j-->9;x.clearRect(960-i*700/j,700-W/j*T(t/2-(q<9||q)/99),300/j,150/j))q=T(i*j+t/j)

May 15 2018 8:12 PM UTC

}// 129/140

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Shattering floors

u/jylikangas

Inspired by http://sid766.tumblr.com/post/172062394600

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yonatan

function u(t) {

c.width|=0
for(i=3e3;i--;x.fillRect(960+(h=S(i/88-t)*i/5),1200-i/2-C(t+i/55+h*h/1e5)*h*i/4e3,s=99/i**.3,s))x.globalAlpha=.01

May 14 2018 5:25 PM UTC

}// 124/140

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#smoke

u/Cloud

Good smoke

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joeytwiddle

remix of d/3634 by u/joeytwiddle

function u(t) {

r=Math.random,w=700,a=w*r()**.6,p=w*r(),x.fillRect(p&7?960+a/2*C(p):960+99*C(p),p&7?980-a-a/6*S(p):90+200*r()+30*S(p),.2,.2),t<9&&u(t+.002)

Apr 12 2018 6:33 AM UTC

}// 139/140

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Example of looping with recursion, trailing off as time goes by

u/joeytwiddle

For the first 9 seconds it calls u() 250 times per frame (on average), after that just once per frame
u/hollo47

Looks like these M.C. Escher lithographies, I love the feel of it!

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joeytwiddle

remix of d/7597 by u/joeytwiddle

function u(t) {

for(c.width|=i=192;i--;x.fillRect(940+n*9*S(a=i%6*1.04+S(p)/5+t),520+n*9*C(a),n,n))n=((j=i/6)%16)**2/5,x.globalAlpha=.5+C(p=j*.6+t*6)/2

Apr 7 2018 6:14 PM UTC

}// 135/140

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Spiral starfish. Change +t to -t and watch its feet

u/joeytwiddle

Dropped a for thanks to u/New_Core

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fervour

function u(t) {

p=40;for(i=48;i--;)for(j=27;j--;){c=(C(i/3+t*3)+S(C(j/4)+t*5)+S((i+j+t*9)/12))*50;x.fillStyle=`hsl(${c},99%,${c}%)`;x.fillRect(i*p,j*p,p,p)}

Mar 28 2018 11:59 AM UTC

}// 140/140

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u/iverjo

Plasma!
u/DirtyDan

Remixed: d/7527

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sop

function u(t) {

for(s=30,a=C(t),b=S(t),i=2304;i--;X=i&63,Y=i>>6,U=C(X/20)*s*a,V=C(Y/20)*s*a,x.fillStyle=R((V*b+U*a|U*b-V*a)*6&255),x.fillRect(X*s,Y*s,s,s));

Mar 28 2018 10:47 AM UTC

}// 140/140

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