Dweets by u/hamptonio

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: #ScaryMovies

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hamptonio

remix of d/1203 by u/vegolasse

function u(t) {

q=43;function a(r){x.arc(q+S(r/3)*400,q+S(r/2)*730,i,0,6.283);x.closePath()}c.width=q*q;for(i=0;i<q*q;i+=9){a(t);a(S(t))};x.fill("evenodd")

Feb 25 2017 1:10 AM UTC

}// 140/140

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seems like that evenodd method could do some other cool shit

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hamptonio

function u(t) {

r=Math.random;for(j=0;j<100;j++){y=r();L=2+2*r();for(i=0;i<1000;i++){y=y*L*(1-y);};
x.fillRect((L-2)*960,y*1000,1,1)}

Feb 24 2017 7:36 PM UTC

}// 117/140

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u/iverjo

Explanation please? I feel like I've seen this kind of thing before, and the first thing that comes to mind is "edge of chaos"
u/hamptonio

Its the bifurcation diagram of the logistic map: https://en.wikipedia.org/wiki/Bifurcation_di…
u/donbright

iverjo: bifurcation diagram
u/rodrigo.siqueira

#bifurcation

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hamptonio

function u(t) {

c.width=1920;q=y=8.48+1/t;z=27;for(i=0;i<5000;i++){q+=.1*(y-q);y+=.01*(q*(28-z)-y);z+=.01*(q*y-8*z/3);x.fillRect(q*20+900,y*20+500,3,3);}

Feb 24 2017 7:11 PM UTC

}// 137/140

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The Lorenz equations chaotic strange attractor

u/donbright

love this math / physics stuff!!!!
u/hamptonio

thanks! I'm better at math than javascript :)

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hamptonio

function u(t) {

a=960;r=Math.random,!t&&(p={x:a,y:540,c:0,d:0}),p.c+=r()-r()-(p.x-960)/a,p.d+=r()-r()-(p.y-540)/a,p.x+=p.c,p.y+=p.d,x.fillRect(p.x,p.y,3,3);

Feb 24 2017 4:47 PM UTC

}// 140/140

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Remix of one by Niklas

u/lionleaf

(If you do the edit and post directly from another dweet they will link up and you'll get the "remix of #xxx by xyz" tag :) )
u/donbright

drunk electron?
u/hamptonio

just messing around, this is my first day!

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hamptonio

function u(t) {

c.width=1920;a=3840;for(i=0;i<a;i++){var y=540*(1+S((60-t/60)*i/a));var q=a/4*(1+C(t*i/a));x.fillStyle=R(i,q/2,y/4);x.fillRect(q,y,20,20);}

Feb 23 2017 9:53 PM UTC

}// 139/140

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hamptonio

function u(t) {

c.width=1920;for(i=0;i<1024;i++){var y=540*(1+S((60-t/60)*i/20));var q=960*(1+C(t*i/1200));x.fillStyle=R(i%4,q,i);x.fillRect(q,y,20,20);}

Feb 23 2017 9:15 PM UTC

}// 137/140

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u/cagr30

Super

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