Dweets awesomed by u/katkip

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

Please log in (or register) to post a dweet (copy-paste the code somewhere safe to save it meanwhile)


    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

show FPS hide FPS share fullscreen

pavel

function u(t) {

t?c.width|=0:(i=A=240,j=B=80,p=q=-9)
x[f='fillRect'](i+=p=i<7*A?p:-p,840,A,A)
x[f](j+=q=j>0?q:-q,1e3,B,B)
j>i-B&&(j=i-B,p+=s=(q-p)/5,q-=s*9)

Jan 24 2019 10:56 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Perfect elastic collision #physics #simulation

Show more comments…
u/pavel

Big block is 9x the weight of the little block
u/katkip

This is impressive. Idea from 3blue1brown?
u/iverjo

Wow!
u/bekfast2390

This is like ping-pong!
u/joeytwiddle

Some context: https://www.youtube.com/watch?v=HEfHFsfGXjs 3Blue1Brown
u/katkip

hi, PI
u/Undefined

A fellow 3b1b fan, I see :D
u/joeytwiddle

#3b1b
u/ivylab

I always wait until the big one gets way up to the left side and it goes bam bam bam bam bam :)

show FPS hide FPS share fullscreen

katkip

function u(t) {

f=n=>{q=C(n)*3.1416,x.moveTo(960+500*C(q*2),540+500*S(q*2)),x.lineTo(960+500*C(q),540+500*S(q))}
x.arc(960,540,500,0,7),f(t,1337),x.stroke()

Jan 24 2019 8:49 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Cardioid

show FPS hide FPS share fullscreen

metamero

function u(t) {

for(j=frame;j--;pauseDemo=parent.postMessage({type:'error',error:'metâmero',location:location.origin+'/id/'+d},'*'))d=t?j%2?d+j:d-j:11934

Jan 24 2019 7:06 PM UTC

}// 137/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

all mine

show FPS hide FPS share fullscreen

katkip

remix of d/11926 by u/katkip

function u(t) {

c.width*=1;x.shadowBlur=20;f=s=>{if(s>10)x.shadowColor=R(s*s),x.fillRect(960+C(s*C(s-t)/99)*s,540+S(s*S(s+t)/99)*s,10,10),f(--s)}
f(30+t*30)

Jan 23 2019 4:45 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

show FPS hide FPS share 1 remix fullscreen

katkip

function u(t) {

x.shadowBlur=20;x.shadowColor='red',f=s=>{if(s>10)x.fillRect(960+C(s*s)*s,540+S(s*s)*s,10,10),f(s/1.1)}
f((t*t*t)%900)

Jan 23 2019 4:41 PM UTC

}// 118/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#virus evolving

show FPS hide FPS share fullscreen

katkip

function u(t) {

c.width^=0;for(i=160;i--;)for(j=70;j--;)m=Math.abs(80-i),n=Math.abs(35-j),x.fillRect(i*20-j*20,j*15+m*C(m/2-t*2)+n*S(n/2-t*2),10,10)

Jan 23 2019 4:34 PM UTC

}// 132/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

#waves

u/Xen

nice

show FPS hide FPS share 1 remix fullscreen

mxfh

remix of d/2442 by u/mxfh

function u(t) {

c.width|=b=50
h=S(t)
for(e=6.283;e>0;x.lineTo(d*C(e-=.01)+h*(C(e)+T(e/3+t/T(e)))+960,d*S(e+S(t)/9)-h+540))d=420
x.fill("evenodd")

Jan 22 2019 11:44 PM UTC

}// 129/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/Xen

NICE! :-)
u/katkip

Haha
u/magna

#glitch
u/mxfh

this one doesn’t even need the fillrule. Was just looking into other cycloids and Lissajous figures, only to end up with a circle.

show FPS hide FPS share fullscreen

katkip

remix of d/11910 by u/katkip

function u(t) {

t*=Math.PI*(3*t|0)*2;x.fillRect(960+C(t)*t/6,540+S(t)*t/6,5,5)

Jan 21 2019 5:20 PM UTC

}// 62/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

faster plot of PI rotator

show FPS hide FPS share 1 remix fullscreen

katkip

function u(t) {

t*=Math.PI*(t|0)*2;x.fillRect(960+C(t)*t/10,540+S(t)*t/10,5,5)

Jan 21 2019 5:09 PM UTC

}// 62/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

The PI rotator

show FPS hide FPS share fullscreen

katkip

function u(t) {

f=(X,Y,s,q=s*2)=>{if(s>2)x.fillRect(X-s,Y-s,q,q),f(X-s*1.5,Y,s/2),f(X+s*1.5,Y,s/2),f(X,Y-s*1.5,s/2),f(X,Y+s*1.5,s/2)}
f(960,540,200+t)

Jan 20 2019 2:11 PM UTC

}// 134/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

A #fractal cross #recursion #recursive

dwitter.net | katkip (33318)