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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henrosaurus

function u(t) {

c.width|=0
with(x)for(i=999;i--;fill())fillStyle=R(255*T(i)*S(t),0,t),beginPath(),arc(960+S(i+t)*i,540+T(i)*S(t)*i,i*Math.abs(C(t))+i,0,6)

Aug 16 2019 10:46 PM UTC

}// 138/140

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burning temple

u/hope4tg

also burning my pc
u/joeytwiddle

Interesting #fire #heavy

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katkip

function u(t) {

eval(unescape(escape`𪑦𚀡𭀩𮱱👛𧐻𩡯𬠨𪐽𞐹𞐻𪐭𛐻𚑱𛡰𭑳𪀨𮱸𞠹𝠰𛁹𞠵𝀰𛁡𞡩𚡩𯐩𯐻𒡦𫱲𚁯𘁯𩠠𬐩𮀮𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮱯𛡸𛱴𯐬𞐹𙐬𝐰𙐩𨀬𮀮𩡩𫁬𤡥𨱴𚁯𛡸𛁯𛡹𛁴𛁴𚐬𫰮𮀫👃𚁯𛡡𚐪𭀬𫰮𮐫👓𚁯𛡡𚐪𭀬𫰮𨐫👓𚁯𛡸𚡯𛡹𚐻`.replace(/u../g,'')))

Aug 15 2019 9:19 AM UTC

}// 129/140

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Some deterministic walkers

u/Xen

hypnotic
u/katkip

when spaghetti starts getting gay

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rodrigo.siqueira

remix of d/14415 by u/rodrigo.siqueira

function u(t) {

x.fillRect(0,0,2e3,2e3)
v=(a,b,Φ,r)=>{for(i=0;i++<r;)x.clearRect(a-=S(Φ),b-=C(Φ),s=r/9,s)
r>8&&v(a,b,Φ+S(t*i**9)/2,r*=.9)}
v(940,1e3,0,99)

Aug 14 2019 1:21 AM UTC

}// 138/140

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Tesla rays #organic

u/KilledByAPixel

Φ

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henrosaurus

function u(t) {

c.width|=0;with(x)for(i=99;i--;fill())fillStyle=R(255*S(i),180,240),beginPath(),arc(960+T(i)*i*C(T(t)*i/3),540+T(i)*i,Math.abs(C(t)*i),0,i)

Aug 16 2019 11:30 PM UTC

}// 139/140

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boygirlswirl

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donbright

function u(t) {

x.font ="144pt Arial";
x.fillText("♥Mom♥️",600,640);

Aug 15 2019 10:59 PM UTC

}// 53/140

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taupelink

function u(t) {

for(i=z=300,d=e=f=0;i--;x.fillRect(d*z,e*z,1,1))[d,e,f]=[(r=Math.random()*20|0)/3+S(d+f),r%4+f*C(3*d+r),(r%2+f)/2],x.fillStyle=R(0,r*4,r*13)

Aug 18 2019 3:50 AM UTC

}// 140/140

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henrosaurus

remix of d/15428 by u/henrosaurus

function u(t) {

c.width|=0
with(x)for(i=99;i--;fill())fillStyle=R(255*T(i),0,t),beginPath(),arc(960+S(i+t)*i,540+S(i)*S(t)*i,i*i,0,10)

Aug 16 2019 10:55 PM UTC

}// 118/140

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guess who's watching

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henrosaurus

function u(t) {

c.width|=0
with(x)for(i=999;i--;fill())fillStyle=R(255*T(i),255*S(t)*T(t),255*S(t)),beginPath(),arc(960+T(i+t)*i,540+T(i)*C(t)*i,i,0,i)

Aug 16 2019 10:34 PM UTC

}// 135/140

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u/philipkd

I'm trying to learn the c.width thing, how come you did |=? Isn't is the same as =0?
u/henrosaurus

yeah its just an abbreviation

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zibx

function u(t) {

j=w=9e2;k=70;for(;w--;)x.fillRect(g=S(j/S(w))*j%w+C(t/j+w)*S(j),l=w+g*S(t/j),l*S(l**(t/k))*g/w,l*w%g/3),x.fillStyle=R(S(t/l)*k+k,g);x.fill()

Aug 17 2019 5:47 PM UTC

}// 140/140

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taupelink

function u(t) {

for(i=1e3,d=e=0;i--;x.fillRect(d*960,e*1080,1,1))[d,e]=[d+((r=Math.random()*3|0)-d+e*S(d*6.3))/2,e+(1-r%2-e)/2],x.fillStyle=R(!r*255,0,r*99)

Aug 16 2019 3:31 AM UTC

}// 140/140

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Nonlinear with a trig function, with simultaneous coordinate updating like I "ought" to have been doing all along 👀