Dweets awesomed by u/iverjo

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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sigveseb

function u(t) {

r=s=>Math.random()*s;for(m=i=128;i--;x.fillText('❄',r(2e3),r(2e3)))x.fillStyle=R(W=m+r(m),W,W*1.5);x.drawImage(c,S(t/13)*S(t/11),.5)

Jul 28 2016 3:28 AM UTC

}// 132/140

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u/iverjo

Beautiful! Looks like a misty storm of some sort
u/sigveseb

#rain

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iverjo

remix of d/279 by u/iverjo

function u(t) {

c.width=500;x.translate(250,95);M=1.5*S(t*2);for(j=66;j--;)x.translate(9,0),x.rotate(M*.1+(1-M)*((j+8)%21?0:2.1)),x.lineTo(0,0),x.fill()

Jul 27 2016 2:30 PM UTC

}// 136/140

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New_Core

function u(t) {

if(t%8<1)i=new Date%56;c.width=1920;x.font="800px s";x.fillText(String.fromCodePoint(128512+i),570+200*S(t*1),890-Math.abs(150*C(t*2)));

Jul 26 2016 3:52 PM UTC

}// 136/140

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u/13thptr

#emoji

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chet

remix of d/369 by u/chet

function u(t) {

c.width=i=255;a=(z,Y)=>{for(X=25;X--;){x.fillStyle=R(i-7*X,z*2,-z*2);x.fillRect(X+z+i/2,Y,1,i)}};for(Y=i;Y>179;Y--)a(C(-8*t+Y*.1)*Y*.4,i-Y)

Jul 25 2016 2:36 PM UTC

}// 139/140

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iverjo

function u(t) {

for(i=8e3;i--;)s=149/(i+400),c=S(8e3*s+t*7),x.fillStyle=R(9,c=99*c,99+c),x.fillRect(2e3*(T(i/9)+s*t)%2e3,1440-133*Math.log(i),s=99*s,s)

Jul 24 2016 11:40 PM UTC

}// 135/140

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This was my first attempt at creating a water dweet. I lated discovered that Math.log wasn't the best way to model perspective

u/iverjo

*later
u/iverjo

#water

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iverjo

function u(t) {

for(i=4e3;i--;)c=155+99*S(t+4*S(i*9)),x.fillStyle=R(99+c,c),s=(t+i/100)%9+.3,x.fillRect(640+250*s*C(i),1080+250*s*S(i),s*9,s*9)

Jul 24 2016 11:34 PM UTC

}// 127/140

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Sunset

u/iverjo

#sun

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iverjo

function u(t) {

c.width=1920;for(i=6e3;i--;)s=1/(2100-(i+t*99)%2081),q=9e4*s*s,x.fillRect(960+2e5*s*C(i*173)-q/2,540+2e5*s*C(i*2e5)-q/2,q,q)

Jul 24 2016 2:42 PM UTC

}// 124/140

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A remake of the "Starfield" screensaver that was included in Windows 98

u/iverjo

If you watch this in fullscreen and stare at the center, your brain might be fooled into believing that you are moving
u/iverjo

#starfield #stars

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maraoz

remix of d/356 by u/maraoz

function u(t) {

c.width=1920;function f(y){return Math.sqrt(y)/2*C(y*t)*S(y)*(S(C(t/2))+1)};for(i=0;i<400;i++){x.fillRect(i*5,540+f(i/30.8)*200,8,8)}

Jul 24 2016 4:22 AM UTC

}// 133/140

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If you'repatient you'll encounter some interesting patterns

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iverjo

function u(t) {

x.fillRect(i=0,87,W=c.width=310,3);x.font='49px A';for(a of'🚂🚃🚃🚃🚃🚃🚃')x.fillText(a,q=W-t%4*W+i++*46,90+S(q/15))

Jul 24 2016 2:14 AM UTC

}// 110/140

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It turns out that this looks different with the Windows 10 Anniversary update

u/iverjo

#train

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3bl3gamer

remix of d/342 by u/iverjo

function u(t) {

x.fillRect(0,87,c.width=300,3);x.font='49px A';for(i=7;i--;)x.fillText(String.fromCodePoint(128669-(i?0:27)),q=310-t%4*210+i*46,90+S(q/15))

Jul 23 2016 8:14 PM UTC

}// 139/140

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A bit modified iverjo's Choo choo: http://dweet.dwitter.net/id/342?autoplay=1

u/iverjo

Nice ^^ I like how you used fromCodePoint instead of fromCharCode to shave bytes. Btw, you can replace (i?0:27) with !i*27 to make the code even shorter
u/sigveseb

for..of can make this quite a bit shorter! x.fillRect(i=0,87,W=c.width=310,3);x.font='49px A';for(a of'🚂🚃🚃🚃🚃🚃🚃')x.fillText(a,q=W-t%4*W+i++*46,90+S(q/15))
u/iverjo

stiaje tried to create a dweet with unicode characters in the code, and it didn't work.. why does it work now? :D
u/iverjo

Maybe it was a problem with base64 encoding/decoding @ arkt.is/t/
u/iverjo

#train

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