Dweets awesomed by u/lionleaf

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: #Food

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SpecialAgent

function u(t) {

Z=z=>x.fillStyle=z;Z(R(0,0,0,0.1));x.fillRect(0,0,1920,1080);Z(R(0,128,0));x.font='999px a';x.fillText('☢',690, 860+200*S(t));

Feb 24 2017 12:52 PM UTC

}// 127/140

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u/5Mixer

Nice trail, makes it looks like it almost has a radioactive glow :P
u/d0n.key

Please center it next time :'(

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SpecialAgent

function u(t) {

for(i=0;i<120;i++)x.fillStyle=R(0, S(t+(i*3))*255, 0),x.fillRect(i*16,0,16,1080)

Feb 24 2017 12:19 PM UTC

}// 80/140

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AJK

function u(t) {

a=t/99;s=128;r=(f,s,p=1)=>s*(f(t*p)+1);x.fillStyle=R(r(S,s),r(C,s),s);x.drawImage(c,r(T,540),r(C,270,a));x.fillRect(r(S,896,a),r(S,476),s,s)

Feb 24 2017 10:36 AM UTC

}// 140/140

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u/JakeSteam

It didn't even start off making sense, and got more chaotic from there!

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5Mixer

function u(t) {

y=(h=999)/2;i=w=c.width=h*2;
while(i--){x.fillStyle=R(i/7,(w-i)/7,i)
o=(h-i)%y
l=C(o*4)*(o%(w/(S(t)*9)))
x.fillRect(i,y+S(i/w*9+t)*99,1,l)}

Feb 24 2017 10:28 AM UTC

}// 140/140

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Some interesting tricks - I use a backwards while loop, not sure if this is shorter. To go from screen width to 256 for colours, I divide by 7. Alot of variable reuse. First one, enjoy heh :)

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BNeutral

function u(t) {

w=t/1.4;s=100/t;v=80/t;x.fillStyle=R(255*S(w));x.fillRect(v*16*Math.pow(S(w),3)+960-s/2,540-s/2-v*(13*C(w)-5*C(2*w)-2*C(3*w)-C(4*w)),s,s);

Feb 24 2017 9:54 AM UTC

}// 138/140

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u/Kalanchoe

cute!
u/iverjo

#heart
u/ItzChimp

Do you have to use Math.pow here? Can't you use ** instead?

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sfz

function u(t) {

a=37
t/=7
for(j=7;j<a*4;j+=7)
for(i=7;i<a;i++)
l=a*i,m=a*j,x.fillStyle=R(l*C(t+i),m*C(t+j),m*S(t)),x.fillRect(a*a+i*l*S(j+t),l+m*C(i+t),j,i)

Feb 24 2017 7:49 AM UTC

}// 140/140

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u/lionleaf

Chaotic

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donbright

remix of d/1055 by u/paberr

function u(t) {

x.font="99px Arial";for(i=64;i;i--)w=3+i%8<<7,h=i/8<<7,(i/8^i)%2?x.fillRect(w,30+h,128,128):1,x.fillText(i%29<1?"♚":i%37<1?"♔":" ",w+20,h)

Feb 24 2017 7:27 AM UTC

}// 138/140

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stalemate!

u/5Mixer

Chess pieces were a nice touch :)
u/sigveseb

cool ^^
u/donbright

#chess

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323454

function u(t) {

t=t*10
x.lineTo(Math.abs(S(t))*t*10, Math.abs(C(t))*t*10)
x.stroke()

Feb 24 2017 7:24 AM UTC

}// 68/140

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u/fson

Like a spider weaving a web.

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mxfh

remix of d/683 by u/mxfh

function u(t) {

r=480;c.width=4*r;for(φ=a=Math.PI/2;φ>-a;φ-=a/r)x.fillRect(C(φ)*S(λ=φ*r/9+t)*r+2*r,S(φ)*r+r,z=9*C(λ/2)**2,z*C(φ))

Feb 24 2017 5:09 AM UTC

}// 113/140

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u/iverjo

#sphere

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Renaud___

function u(t) {

c.width=2e3;a=h=f=i=g=600;y=Math.PI/3+t/1e3;while(f++<5*a){for(e=4,z=2;z<a;z*=4)f%z==z/2?e=1:0;i+=e;x.lineTo(g+=C(y*i),h-=S(y*i))}x.fill()

Feb 24 2017 1:20 AM UTC

}// 138/140

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u/Xen

nice

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