Dweets awesomed by u/alien

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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Current theme challenge: #ScaryMovies

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alien

remix of d/9505 by u/alien

function u(t) {

w=c.width=100
f=frame
for(j=0;j<w;j++)
for(i=0;i<w;i++){
q=(i*i+j*j)**0.5+25*f
s=i*T(q)
s%=255
x.fillStyle=R(s,s*2,s)
x.fillRect(i,j,1,1)}

Aug 28 2018 8:30 PM UTC

}// 139/140

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dynamical pattern

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alien

remix of d/2842 by u/alien

function u(t) {

w=c.width=180
f=frame
for(j=0;j<w;j++)
for(i=0;i<w;i++){
q=(i*i+j*j)**3+9*f&w
s=i*(q/45)
s%=255
x.fillStyle=R(s,s*2,s)
x.fillRect(i,j,1,1)}

Aug 28 2018 7:56 PM UTC

}// 140/140

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f8f82804

function u(t) {

t?x.rotate(.01):x.translate(960,540);for(a=s=32;a--+s;c=4+S(t))for(b=s*2;b--+s;x.fillRect(s*a,s*b,s,s))x.fillStyle=`hsl(${c*a^c*b+t} 99%50%`

Aug 26 2018 2:26 AM UTC

}// 140/140

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nabbydude

remix of d/8811 by u/nabbydude

function u(t) {

x.fillStyle=R(a=w*!x.getImageData(...P).data[0])
d+=!a||3
x.fillRect(...P)
P[j=d%2]+=(d%4<2||h*w-1)*5
P[j]%=(j?h:w)*2}{P=[d=w=960,h=540,5,5]

Jul 5 2018 4:27 PM UTC

}// 140/140

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Golfed my Langton's ant enough to fit in some scaling

Show more comments…
u/nabbydude

(and fix the aspect ratio)
u/aleamb

#cellular #automaton
u/alien

Hi there what is this part doing a=w*!x. ? :)
u/BalintCsala

@alien I think that gets the image data at the current position and if it's red, makes the fillStyle black and vice-versa
u/nabbydude

@alien @BalintCsala is right, x.blahblah is 0 if the pixel is black and 255 if its red, inverting it makes 0 into 1 and 255 into 0, and then we multiply by w because its a big number (>255) to make the color more visible
u/nabbydude

@alien @BalintCsala is right, x.blahblah is 0 if the pixel is black and 255 if its red, inverting it makes 0 into 1 and 255 into 0, and then we multiply by w because its a big number (>255) to make the color more visible

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alien

remix of d/8803 by u/alien

function u(t) {

t?1:(a=0,onkeydown=e=>a+=e.which) 
c.width=999
for(i=99;i--;){for(j=99;j--;u=S(i&j)*a){x.fillText(String.fromCharCode((9*t)^u),i*10,j*10)
}}

Jul 3 2018 9:54 PM UTC

}// 140/140

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Not working for mobile, just press a key, let it iterate and explore patterns.

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alien

remix of d/8802 by u/alien

function u(t) {

t?1:(a=0,onkeydown=e=>a+=e.which) 
c.width=999
for(i=99;i--;){for(j=99;j--;u=S(i&j)*a){x.fillText(String.fromCharCode(frame-u),i*10,j*10)
}}

Jul 3 2018 9:29 PM UTC

}// 140/140

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press any key ping me if it's broken.

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alien

remix of d/8794 by u/alien

function u(t) {

c.width=500
for(i=0;i<(w=99);i++){for(j=0;j<w;j++){
x.fillText(String.fromCharCode(u=(i^j&j)+frame>>3),i*10,j*10)
x.fillStyle=R(C(u)*w*9)}}

Jul 3 2018 7:22 PM UTC

}// 139/140

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u/aleamb

great!

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alien

remix of d/8793 by u/alien

function u(t) {

c.width=500
for(i=0;i<(w=99);i++){for(j=0;j<w;j++){x.fillText(String.fromCharCode(u=(i^j&j)+frame>>3),i*10,j*10)
x.fillStyle=R(C(u)*w*9)}}

Jul 2 2018 8:40 PM UTC

}// 138/140

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Just click on fullscreen and enjoy the show all known chars displayed in a fractal rain

u/firegodjr

You redefined u, redefining u breaks it. If you switch to edit mode (click and add a space or something) it fixes the issue.

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alien

remix of d/8790 by u/alien

function u(t) {

c.width=500
for(i=0;i<(w=99);i++){for(j=0;j<w;j++){x.fillText(String.fromCharCode(u=(i^j&j)+frame>>3),i*10,j*10)
x.fillStyle=R(C(u^i)*w*9)}}

Jul 2 2018 8:10 PM UTC

}// 140/140

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won't work on mobile android... PCs and laptops are ok

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Xen

remix of d/8790 by u/alien

function u(t) {

c.width=600
for(i=54;i--;)for(j=39;j--;)x.fillText(String.fromCharCode(i/S(t)-j/C(t)),i*9,j*9)

Jul 1 2018 11:06 PM UTC

}// 94/140

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