Random dweets | Dwitter

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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tzador

function u(t) {

c.width|=0
for(o=-39;o<39;o++)for(y=-100;y<1080;y+=5)x.fillRect(o*800*y*0.001+200+S(t+y*0.01)**2*500,y-59,500*y*0.001,3)

Feb 2 2025 10:40 PM UTC

}// 120/140

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Odog8

remix of d/29652 by u/Odog8

function u(t) {

throw [d=~~t,a="Fizz",b="Buzz",a+b][!(d%3)+!(d%5)*2]

Mar 13 2024 10:55 PM UTC

}// 52/140

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missed something obvious

u/Odog8

the first one was cooler though.
u/DaSpider

Couldn't just let you have it! d/29667 ;-)
u/DaSpider

#FizzBuzz
u/SockTaters

very sad that indexing with [3&19142723>>t%15*2] isn't any shorter

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katkip

remix of d/10534 by u/tomxor

function u(t) {

x.fillRect(0,0,i=2e3,i);for(t+=t*10;p=i&1,m=t/C(t/i)+p*(t/i*i+i%t),i--;)x.clearRect(960+m*S(n=i*i+t/9+t*i/8769)/C(1/t+p),540+m*C(n+p/t),5,5)

Oct 19 2018 6:10 PM UTC

}// 140/140

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#waitforit to see how does it look in a black hole!

u/tomxor

OMG it's a stargate :P

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Xen

function u(t) {

for(z=h=c.width=99;z--;)for(y=h;y--;x.fillRect(z,y/.8,N,N))for(N=D=2.6;X=D*z/h-D,Y=D*y/h-D,D+=d=(X*Y-C(t*T(Y))+D*N)/2-3+C(X)*C(Y),1<d*N--;);

Jul 29 2017 8:01 PM UTC

}// 140/140

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u/jick

This is really nice.
u/Xen

Thanks, its a rubbish port of p01's TeaStorm

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danny@hille.dk

remix of d/20340 by u/danny@hille.dk

function u(t) {

for(c.width=X=60;X--;)for(Y=34;Y--;)x.fillStyle=R(o=255*(C(t-X/4)+S(t+X/9+S(Y/(4+S(t/4)-S(X/Y))))),o*S(Y-t*9+S(X+t)),-o),x.fillRect(X,Y,1,1)

Oct 21 2020 5:59 PM UTC

}// 140/140

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let's play mario style

Show more comments…
u/danny@hille.dk

I made a hi res version here: http://glslsandbox.com/e#68682.1
u/rodrigo.siqueira

The hi res version is a hundred or thousand times faster. I didn't know about glslsandbox. Nice gallery of fast GLSL demos (OpenGL Shading Language).
u/danny@hille.dk

I just recently got aware of http://glslsandbox.com/ - and by reading some of the code from the demos i also found https://www.shadertoy.com/ - but be aware you really need a computer with a powerfull graphics card or else everything just freezes up :-)
u/danny@hille.dk

I also found that, the shaderlanguage is more like c than javascript, and the way you code shaders, are quite different from codeing for canvas2d :-) - Challenge accepted!
u/danny@hille.dk

Here is a version where I have fixed some minor bugs http://glslsandbox.com/e#68682.7
u/danny@hille.dk

Please share, if any of you guys creates something on glslsandbox
u/rodrigo.siqueira

I created a remix of a simple code I found on glslandbox: http://glslsandbox.com/e#68725.0 (Animated blue 3D waves)
u/joeytwiddle

If you like glsandbox, you might also like https://shadertoy.com/
u/danny@hille.dk

u/rodrigo.siqueira that looks awesome!
u/danny@hille.dk

Thanks u/joeytwiddle, i did try shadertoy, but the website is a bit to harsh on my laptop :-)
u/rodrigo.siqueira

I also created 2 other remixes: Rotating Ring of Fire http://glslsandbox.com/e#68726.0 and Purple Unfolding Waves Under a Deep Blue Sky http://glslsandbox.com/e#68725.1
u/danny@hille.dk

u/rodrigo.siqueira cool stuff, I also have been palying with GLSL i have converted some of my dweets FX: http://glslsandbox.com/e#68778.0
u/danny@hille.dk

I really like the organic look-feel, you can achieve with sin/cos event with just black/white http://glslsandbox.com/e#68767.0 I'm properbly gonna make this into a dweet :-)

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Xen

function u(t) {

r=Math.random
f=z=>x.fillRect(z,t*99,9,9)
f(9+r()*99)
f(299+(r()+r())/2*99)
f(599+(r()^r())*99)
f(899+(r()*r())/r()*99)

Jul 11 2019 3:33 PM UTC

}// 119/140

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bored math test with random

u/Fime

Golfing tip: When calling a random function often you might want to use r={valueOf:Math.random} instead. You then get a new random value when accessing r like a normal variable (no () needed)
u/f8f82804

If you're willing to re-use an already-declared variable you can save a couple more characters: T.valueOf=Math.random
u/donbright

yay. #trigfree

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magna

function u(t) {

t||(a=Array(w=1920).fill(0))
x.drawImage(c,0,0,w,w,0,1,w,w)
for(i=w;i--;x.fillRect(i,0,1,1))x.fillStyle=`hsl(${a[i]+=Math.random()},99%,50%`

Nov 4 2018 5:11 PM UTC

}// 140/140

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u/yonatan

x.drawImage(c,0,1) for(i=2e3;i--;x.fillRect(i,0,1,1))u[i]=u[i]||0,x.fillStyle=hsl(${u[i]+=Math.random()},99%,50%

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jdidion

function u(t) {

c.width=1920;for(i=0;i<Math.PI*2;i+=3.14/t/6,x.beginPath(),x.arc(990+S(t)*99+C(i)*99,500+C(t)*99+S(i)*99,400*(S(t+i)+1),0,7)
)x.stroke()

May 10 2018 3:12 PM UTC

}// 136/140

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rodrigo.siqueira

remix of d/32576 by u/HardlyProductive

function u(t) {

x.reset()
f=(a,b)=>{for(i=1e3;i--;)x.fillRect(j*235+75*C(z=a/b*i*8)*C(i+a),k*200+75*S(z+t*5)*C(i-b*a),2,2)}
for(j=8;j--;)for(k=5;--k;)f(k,j)

Oct 11 2024 7:58 PM UTC

}// 140/140

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pieces

u/vain

so cool ♥
u/mistrfu

beautiful

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rodrigo.siqueira

remix of d/33064 by u/rodrigo.siqueira

function u(t) {

for(i=2e4;i--;x.fillRect(170*X-354,25*Y+540,(f&8*2)/19,t<6))X=i*i/t%15,Y=22*S(i+t),f=((.8+S(X-3))/(4.5+2*(X-7.857)**2+Y*Y)*1800)

Jan 15 2025 3:21 PM UTC

}// 128/140

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Concentric symmetry