Top dweets by u/keithclark

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: #Opposites

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keithclark

function u(t) {

for(a=c.width|=0;l=C(t),m=S(t),d=C(a)*S(b=a*1.2502),e=S(a--)*S(b);x.fillRect((d*l+e*m)*h+960,C(b)*h+540,i=h/40-5,i))h=900/(2+(e*l-d*m))

Mar 23 2017 5:49 PM UTC

}// 135/140

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u/recursive

Superbly golfed
u/keithclark

Even smaller: https://www.dwitter.net/d/2298
u/donbright

bravo

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keithclark

function u(t) {

for(c.width=340,i=160;i--;x.font=7+C(j=t*9+(X+Y)/2)+'pt a',x.fillText(['🔵','⚪️','🔴'][X/5|0],50+C(j)*4+X*16,32+S(j)*4+Y*16))X=i%15,Y=i>>4

Sep 25 2018 3:05 PM UTC

}// 136/140

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[...'🔵⚪🔴'] to save 4 bytes

u/f8f82804

u/keithclark: you have to remove the variant selector to make that work
u/MatthewKhan

You have to change the colours to make that work

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keithclark

function u(t) {

with(x)for(c.width=L=a=255,globalCompositeOperation='exclusion';a-=5;arc(v=S(G+=t)*90+L/2,v/2,a,~beginPath(fill()),6))fillStyle=R(L,G=a%2*L)

Mar 7 2018 5:56 PM UTC

}// 140/140

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I was hoping for a more interesting vertical path but couldn't find enough bytes.

u/AnnanFay

S(G+t) saves a character.
u/keithclark

Thanks - that was left over from a previous optimisation for computing a different Y offset

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keithclark

remix of d/2671 by u/keithclark

function u(t) {

for(a=1e4,J=S(t/=2)/7,c.width=Z=127;a--;)x.fillRect(X=a&Z,Y=a>>7,1,'p}¶¼<¼¶}p'.charCodeAt(Z+Y*C(t)-X*J&15)>>(X*C(t)+Y*J+Z*t)%15&1)

May 3 2017 4:27 PM UTC

}// 132/140

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6 bytes shorter (thanks p01)

u/iverjo

So good!
u/keithclark

Add a ~ before 'p}¶¼<¼¶}p' to invert colours
u/Lazy1337

epic #rotozoom
u/vain

nice rotozommer

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keithclark

function u(t) {

for(c.width|=a=8,l=C(t),m=S(t);a--;x.fillRect((d*l-e*m)*h+960,(g*l-f*m)*h+520,h/=5,h))d=a&1||-1,e=a&2,f=a&4&&-2,g=d*m+e*l,h=450/(4+g*m+f*l)

Mar 22 2017 1:29 PM UTC

}// 139/140

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keithclark

remix of d/14463 by u/keithclark

function u(t) {

for(o=[c.width=i=480];i--;o[i]=[C(t+=w=140)*C(i),S(t)*C(i),S(i)]);for([Z,X,Y]of o.sort())Z-=1.5,x.fillText('🔵',240+w*X/Z,w+w*Y/Z,14-Z*Z*2)

Jun 12 2019 4:47 PM UTC

}// 138/140

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keithclark

remix of d/14444 by u/keithclark

function u(t) {

for(o=[c.width=i=320];i--;o[i]=[C(t+=w=99),S(t),S(i)]);for([Z,X,Y]of o.sort())x.font=`${5+Z--*3|0}px a`,x.fillText('🔵',160+w*X/--Z,w+w*Y/Z)

Jun 6 2019 12:16 PM UTC

}// 139/140

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Depth sorting: Cylinder

u/keithclark

144 - sphere: for(o=[c.width=i=320];i--;o[i]=[C(t+=w=99)*C(i),S(t)*C(i),S(i)]);for([Z,X,Y]of o.sort())x.font=4+Z--+'pt a',x.fillText('🔵',160+w*X/--Z,w+w*Y/Z)

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keithclark

function u(t) {

for(a=1e4,c.width=$=127,J=S(t/=2)/7;a--;'p}¶¼<¼¶}p'.charCodeAt($+Y*C(t)-X*J&15)>>(X*C(t)+Y*J+$*t)%15&1&&x.fillRect(X,Y,1,1))X=a&$,Y=a>>7

May 3 2017 1:18 PM UTC

}// 138/140

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rotozoomer

u/p01

:)
u/p01

Save 4 bytes using
u/p01

x.fillRect(X,Y,1'p}¶¼<¼¶}p'.charCodeAt($+Y*C(t)-X*J&15)>>(X*C(t)+Y*J+$*t)%15&1)

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keithclark

function u(t) {

for(c.width|=$=256;$--;)x.fillStyle=R(z=$%15,x.font=z*8+"pt a",x.fillText('❄',($*1e6+S(t+$)*z*3)%2050-99,(z*t*30+$*$)%2050),z/15)

Mar 7 2018 1:06 PM UTC

}// 129/140

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u/prplz

☃
u/keithclark

#snow

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keithclark

remix of d/7214 by u/corruptio

function u(t) {

for(v in x)x[v[4]]=v;for(a=L=c.width=255,x[x.a]='exclusion';a-=5;x.arc(S(V+=t)*99+99,C(V)*66+66,a,!x[x.n](x.fill()),9))x[x.S]=R(V=a%2*L,L-V)

Mar 8 2018 10:04 AM UTC

}// 140/140

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