Dwitter - javascript demos in 140 characters

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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vinca

function u(t) {

eval(unescape(escape`挮睩摴桼㴰ⱸ⹦楬汒散琨〬〬㉥㌬㉥㌩ⱸ⹦楬汓瑹汥㵒⡴⨹ⰰⰹ㤩ⱡ㴨堬夬䐬䄩㴾䐦☨䔽䐪㤬砮慲挨堽堫㌪䔪䌨䄩ⱙ㵙⭅⩓⡁⤬䔬〬㜩ⱸ⹣汯獥偡瑨⠩ⱡ⡘ⱙⱄⴱⱁ⨱⸲⤩ⱡ⠱攳ⰵ〰ⰱ㔬琩ⱸ⹦楬氨❥癥湯摤✩`.replace(/u(..)/g,"$1%")))

Apr 7 2019 1:14 PM UTC

}// 140/140

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LimeLaser

function u(t) {

r=Math.random
p=r()+r()
a=6.28*r()
p=p>1?2-p:p
x.fillStyle=`HSL(${57.3*a},${100*p}%,50%)`
x.fillRect(955+500*p*C(a),535-500*p*S(a),11,11)

Apr 6 2019 9:24 PM UTC

}// 137/140

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Uniform Random Sampling Within A Circle

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katkip

function u(t) {

f=frame;for(i=0;i<960;i++)x.fillStyle=R(0,0,C(f/t+C(f/40+i/89+t))*S(i/t)*128+128),x.fillRect(i*2,f*2,2,2)

Apr 6 2019 3:00 PM UTC

}// 105/140

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#waves

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rodrigo.siqueira

remix of d/12968 by u/rodrigo.siqueira

function u(t) {

c.width+=0
for(var i=1e3;i=i-.25;){
var K=(i&2)-S(t)
var X=K*S(i)/2+S(40*i+t)
var Y=C(i)/2-C(40*i-t)*K
x.fillRect(960+X*180,520+Y*180,4,3)
}

Apr 4 2019 12:12 PM UTC

}// 140/140

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Two dancing torus. "var" is not needed, but performance (fps) is better with them.

u/username

But if you do not specify anything, it will be a var anyway?
u/yonatan

It'll be global, which means it can be accessed outside of the u() function, which kills some compiler optimizations

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username

remix of d/13027 by u/username

function u(t) {

t*=256
for(i=3e3;i--;x.fillStyle=`hsl(${t*42},99%,50%`)K=(i&2)-t*t/i,X=S(i)+S(i)*K/t*9,Y=C(i)-C(i)*K/t*9,x.fillRect(960+X*150,640+Y*150,8,8)

Apr 5 2019 10:59 AM UTC

}// 140/140

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u/geb

#background

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username

remix of d/13053 by u/username

function u(t) {

for(c.width=i=2e3;i--;)X=(r=Math.random)()*1910,Y=r()*1070,S(t-(Y/4^X/4)/42)<S(t)?x.fillRect(X,Y,9,9):0

Apr 6 2019 5:43 PM UTC

}// 103/140

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golf?

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BobbyAD

remix of d/13041 by u/BobbyAD

function u(t) {

for(i=3e3;i--;x.fillStyle=`hsl(${t*150},95%,45%`){X=C(i);Y=i*2-S(1*i)/i;x.rotate(.9);x.translate(75,-1000);x.fillRect(999+X*C(Y),64+Y,3,77)}

Apr 6 2019 2:26 AM UTC

}// 140/140

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username

remix of d/12989 by u/username

function u(t) {

t*=9
for(i=3e3;i--;x.fillStyle=`hsl(${t*42},71%,67%`)K=(i&2)-2*t*t/i,X=S(i)+S(i)*K/t*9,Y=C(i)-C(i)*K/t*9,x.fillRect(960+X*150,640+Y*150,8,8)

Apr 5 2019 5:30 AM UTC

}// 140/140

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vinca

function u(t) {

c.width|=0,a=(X,Y,D,A)=>D&&(E=D*9,x.arc(X=X+3*E*C(A),Y=Y+E*S(A),E,0,7),x.closePath(),a(X,Y,D-1,A*1.2)),a(1e3,500,15,t),x.fill('evenodd')

Apr 6 2019 12:39 PM UTC

}// 136/140

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username

remix of d/13027 by u/username

function u(t) {

t*=512
for(i=3e3;i--;x.fillStyle=`hsl(${t*42},99%,50%`)K=(i&2)-t*t/i,X=S(i)+S(i)*K/t*9,Y=C(i)-C(i)*K/t*9,x.fillRect(960+X*150,640+Y*150,8,8)

Apr 5 2019 8:01 PM UTC

}// 140/140

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