Hot 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.

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keithclark

function u(t) {

for(a=c.width|=0,G=36,J=S(t)/4;a--;'p}¶¼<¼¶}p'.charCodeAt(Y*C(t)+G-X*J&15)>>(X*C(t)+Y*J+t*G)%15&1&&x.fillRect(X*G,Y*G,G,G))X=a%53,Y=a>>6

May 3 2017 1:26 PM UTC

}// 138/140

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fullscreen rotozoom

u/joeytwiddle

#spaceinvaders #rotozoom #alien
u/yonatan

3-char shorter transposed bitmap (just posting so I won't forget it): 'ĄǼͶ߿׽ԅØ'

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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(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($=c.width|=0;$--;x.fillRect(b+960,F+520,h/=3,h))e=$/7-C(t/4),d=($>>6)+t*6%1,h=d**(d/20),b=S(e)*d*h+S(t/3)/h*4e3,F=C(e)*d*h+C(t/5)/h*1e3

Apr 26 2017 2:35 PM UTC

}// 139/140

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u/magna

Wheeeeee!!!
u/iverjo

#tunnel
u/vain

nice dot tunnel.

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keithclark

function u(t) {

for(a=c.width|=l=C(t),m=S(t);a--;x.fillRect((d*l-e*m)*h+960,(g*l-f*m)*h+520,h/=50,h))d=S(a*92),e=S(a),f=C(a*.7),g=d*m+e*l,h=800/(3+g*m+f*l)

Apr 23 2017 11:33 AM UTC

}// 139/140

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A point cube spinning on two axis with perspective

Show more comments…
u/hscells

this is really nice
u/donbright

great job!
u/magna

Awesome!
u/cantelope

very nice!
u/joeytwiddle

#cube #dots
u/vain

damn cool

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keithclark

remix of d/2561 by u/keithclark

function u(t) {

for(a=c.width|=l=C(t),m=S(t);a--;x.fillRect((d*l-S(a)*m)*h+960,(g*l-f*m)*h+520,h/=65,h))d=S(a*(f=C(a*a))),g=d*m+S(a)*l,h=800/(3+g*m+f*l)

Apr 23 2017 6:19 PM UTC

}// 136/140

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3 bytes smaller

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keithclark

function u(t) {

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

Apr 13 2017 9:50 AM UTC

}// 103/140

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Smaller version of https://www.dwitter.net/d/2298

u/aemkei

Nice golfing!!
u/donbright

ditto

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keithclark

function u(t) {

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

Mar 25 2017 3:25 PM UTC

}// 109/140

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Show more comments…
u/recursive

Huge savings. I wonder what else could be added.
u/donbright

@recursive . ... https://www.dwitter.net/d/2306
u/keithclark

i'm trying to get rotation along 2 axes
u/keithclark

Try changing 1.2502 to different values for different patterns. For example: use 70.286 for death star
u/PeteAJ

A little confused by the for loop. The second statement just defines the variables d and e?
u/joeytwiddle

Here is an earlier version: https://www.dwitter.net/d/2278
u/joeytwiddle

#hiddengem
u/f8f82804

@PeteAJ I've used the same for trick before -- if either of a+t or b are zero, their sine is zero so the product is false-y, which terminates the loop

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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|=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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