Top dweets of all time

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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iverjo

function u(t) {

w=c.width=400;x.fillRect(0,115,w,2);for(i=9;i--;)x.setTransform(9,0,s=i/8|0-(i?0:1),1,1,1),x.fillRect(t%4*40-i*9+53*s,90,8,22)

Jul 22 2016 8:39 PM UTC

}// 126/140

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🚝

u/sigveseb

Trains!
u/iverjo

At least this one is consistent across platforms :P
u/iverjo

#train

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elrod

function u(t) {

c.width=120;for(j=5;j--;)for(i=5;i--;)x.fillRect(i*25,j*7,20,5);x.fillRect(47+15*S(t*8),60,25,5);x.arc(60,12*S(t*6)+47,2,0,6);x.fill()

Jul 22 2016 12:25 PM UTC

}// 134/140

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New_Core

function u(t) {

g=150;w=c.width=1920;x.font=g+"px s";x.fillText("NEW CORE",g,g);for(i=g;i--;)d=S(t+i*0.01)*g,x.drawImage(c,d,i,g*9,1,w+t%35*-g,500+i,w,1);

Jul 22 2016 11:35 AM UTC

}// 138/140

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u/sigveseb

Very cool technique!
u/iverjo

Agreed
u/13thptr

#text

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sigveseb

remix of d/308 by u/b4rc0ll0

function u(t) {

a=Math.random;x.f=x.fillRect;t||(W=999,X=Y=U=V=5),U+=a()-.5;V+=a()-.5;x.f(X,Y,9,9),x.f(Y,X,9,9),X+=U,Y+=V,U*=.99,V*=.99,X=(X+W)%W;Y=(Y+W)%W

Jul 22 2016 2:51 AM UTC

}// 139/140

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This is http://dweet.dwitter.net/id/308?autoplay=1 with velocity-based motion.

u/b4rc0ll0

it's the same , i compute a random orientation for the velocity and than apply S and C of it to the point
u/iverjo

b4rc0ll0: This dweet doesn't use S and C. Instead it has variables U and V for horizontal and vertical speed respectively. This makes the speed dynamic. Interestingly, this technique also yields more diagonal motion.
u/Zolden

oh, nice to know someone had similar idea
u/iverjo

#random

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b4rc0ll0

function u(t) {

a=Math.random;x.f=x.fillRect;t||(W=999,X=Y=U=1.5),U+=.5*(a()-a()),x.f(X,Y,9,9),x.f(Y,X,9,9),X+=9*S(U),Y+=9*C(U),X=(X%W+W)%W,Y=(Y%W+W)%W;

Jul 21 2016 11:16 PM UTC

}// 136/140

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u/iverjo

At first it drew what looked like a princess with hair and my mind was blown. Then I saw Math.random :P I guess this demo can "accidentally" draw something very nice

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tamberlo

function u(t) {

c.width=w=200;x.beginPath();m=S(t*9);x.arc((t*60)%w,30,9,m,6-m);x.stroke();for(i=0;i<20;i++){x.fillRect(i*10+(Math.floor(t*6)*10)%w,30,3,3)}

Jul 21 2016 11:12 PM UTC

}// 140/140

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u/iverjo

Thanks for the inspiration :) I also created a pacman dweet: http://dweet.dwitter.net/id/312?autoplay=1

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greentec

function u(t) {

a=255;for(i=0;i<1920;i+=5)for(j=0;j<1080;j+=5)r=(a*C(.0174*i))%255,g=(a*S(.0174*j))%255,b=(r*g)%255,x.fillStyle=R(r,g,b),x.fillRect(i,j,5,5)

Jul 20 2016 11:49 AM UTC

}// 140/140

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u/iverjo

Here's a version that draws only once: if(!t){a=255;for(i=0;i<1920;i+=5)for(j=0;j<1080;j+=5)x.fillStyle=R(r=(a*C(.0174*i))%a,g=(a*S(.0174*j))%a,r*g%a),x.fillRect(i,j,5,5)}
u/greentec

Oh, Thanks! It was very helpful.

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robohamburger

function u(t) {

c.width=1920;for(i=0;i<9;i++){st=Math.sin(i*t*2);b=256;x.fillStyle=R(b*st,b*(1-st), b*-st); x.fillRect(400+i*60,400-20*st,50,100+20*st)}

Jul 19 2016 10:14 PM UTC

}// 136/140

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u/iverjo

Remember that you can replace Math.sin with S for brevity

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3bl3gamer

function u(t) {

c.width=192;f=a=>{x.translate(96,54);x.beginPath();for(i=0;i<7;i+=.005){r=(T(i*3+t*2)*3+20)*2;x.lineTo(r*C(i),r*S(i))};x.stroke()};f()

Jul 19 2016 9:30 PM UTC

}// 134/140

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profit

function u(t) {

if(t<36)c.width=2e3,x.font="200px verdana",x.fillRect(0,400,54*t,99),x.fillText((t*2.8|0)+'%',800,750),x.fillText('loading dweet',280,300)

Jul 19 2016 5:34 PM UTC

}// 138/140

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u/sigveseb

Nice one :D
u/lionleaf

Haha, awesome! :D Worth the wait ;)