Dweets awesomed by u/sfz

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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Kalanchoe

function u(t) {

r=Math.random
c.width^=0
!t?o=[]:o.push({X:r()*1920,Y:r()*1080,x:r(),y:r()})
o.map((a)=>(x.fillRect(a.X+=a.x+=r()-.5,a.Y+=a.y+=r()-.5,4,4)))

Feb 26 2017 9:37 AM UTC

}// 140/140

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u/donbright

genius use of []
u/SpecialAgent

a clever piece of code

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Jenky

function u(t) {

n=512;r=6.28;for(i=t;i<t+r;i+=r/30){z=i+t;a=-S(i);b=-C(i);x.fillStyle=R(C(z)*n,C(z+r/3)*n,C(z+4.18)*n);x.fillRect(960+S(t)*a*n,n+b*n,9,9)}

Feb 26 2017 8:17 AM UTC

}// 138/140

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Rainbow experiment without 'hsv()'

u/donbright

this is really nice
u/sfz

purdy

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sfz

function u(t) {

for(i=1,l=255;i<l;i++)j=t%9*i,k=i*t%l,m=S(t+j),x.font=j+'px a',x.fillStyle=R(i,k,l-i,m/i),x.fillText('❖',900+j*m*S(i*j),540+j*C(t+i)*S(t-j))

Feb 26 2017 7:38 AM UTC

}// 140/140

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u/sigveseb

watch this for a while, worth the wait!
u/iverjo

Fascinating

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tbroadley

function u(t) {

c.width^=0;for(i=3;i++<11;)a=i*S(t)/4,x.beginPath(),x.arc(960,540,40*i,Math.min(t+a,t+3*a),Math.max(t+a,t+3*a)),x.lineWidth=i*i/5,x.stroke()

Feb 26 2017 5:40 AM UTC

}// 140/140

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u/sfz

sweet loader
u/Kalanchoe

mesmerizing!
u/Tosmatobeef

This is my favorite kind of loading animation
u/iverjo

#loading

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cucumberOwl

function u(t) {

i=new Image();i.src="http://cucumberowl.com/static/cucumberOwl/img/owl.jpg";x.drawImage(i,700+S(t)*500,200+C(t)*200);

Feb 26 2017 1:15 AM UTC

}// 117/140

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u/sfz

swirly whirly!

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cucumberOwl

function u(t) {

a=15;for(i=0;i<1920/a;i++)for(j=0;j<1080/a;j++){x.fillStyle=R(T((i/4*j/4)*t)*50,T((i*j)*t)*50,T((j*i)/t)*50);x.fillRect(i*a,j*a,a,a);}

Feb 26 2017 12:52 AM UTC

}// 134/140

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sfz

function u(t) {

c.width|=0
if(!t)r=new XMLHttpRequest(),r.open('GET','//cors-test.appspot.com/test',1),r.send()
x.font=t+'em a'
x.fillText(r.response,0,500)

Feb 26 2017 12:03 AM UTC

}// 140/140

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tomkh

remix of d/1358 by u/tomkh

function u(t) {

for(q=c.d=c.d||[],k=4e3;k--;)x.fillStyle=R(q[k]=k<80?500*Math.random():.47*(q[k-80]+q[k-79]),0,40,.2),x.fillRect(k%80*24,(45-k/80)*24,24,24)

Feb 25 2017 11:44 PM UTC

}// 140/140

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u/iverjo

Very good!
u/SpecialAgent

Brings back memories :)
u/joeytwiddle

#fire

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khalkeus

function u(t) {

w=960;h=500;c.width=w*2;
for(i=0;i<w*20;i++){z=(S(t+i)+1)*50;x.fillStyle=R(z/3,z*5,z*9);x.fillRect(i,S(t+i)*w+h,1,55);}

Feb 25 2017 11:16 PM UTC

}// 119/140

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hamptonio

remix of d/1301 by u/walsh9

function u(t) {

r=Math.random,T=t*60|0,d=T%64*36,e=(T>>6)*36,s=r()>.5&&e>1,f=s?8:36,g=s?36:8,x.fillRect(d,e,f,g),x.strokeRect(0,0,1920,1080)

Feb 25 2017 4:24 PM UTC

}// 124/140

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Shortened it some without losing too much I think, not sure what to do with the extra room though.

u/sfz

write a maze solver :D

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