Reptorian's G'MIC Code Workshop

[Reptillian]

Some of you may notice that some of my filters has broke. That's because @G'MIC has updated gmic internals to have functions like fill(), and repeat(), and I had made a commit to replace for loop with repeat().

 

It's done because they are to be optimized. So, one should wait until next g'mic update to use them.

Edited May 9, 2021 by Reptillian

[G'MIC]

My fault, sorry.

Everything should have returned to a correct state now. Users of G'MIC 2.9.7 will get your filters working as expected.

 

[Reptillian]

This might be turned into a new filter:

 

 

 

[Reptillian]

Decided not gonna release that filter because there is a problem with current implementation of quadrilateral distort. Particularly when the quad is so distorted that nan values start showing up.

 

So, I went to work into a random bars filter. One that will eventually be more flexible than @pyrochild gradient bars. None of his/her code has been used, it's entirely a new code.

 

 

Spoiler

rep_random_gradient_bars:
skip ${11=}
#$1=Width#
#$2=Spacing#
#$3=Divisions#
#$4=Angle#
#$5=Skew_Angle#
#$6,$7=Position#
#$8=Gradient Shift#
#$9,$10=Gradient Min/Max Multiplier#
#$8=Grayscale#

specified_mode_out={narg($11)}


f "begin(
  const ww=w-1;
  const hh=h-1;
  const sd=max(ww,hh)/min(ww,hh);
  const sx=ww>hh?sd:1;
  const sy=ww>hh?1:sd;
  const wwsx=ww*sx;
  const hhsy=hh*sy;
  const pyth_img=sqrt(ww^2+hh^2);
  const ww_div_sx=ww/sx;
  const hh_div_sy=hh/sy;
  const cx=ww/2;
  const cy=hh/2;
  const ox=cx-(cx*$6);
  const oy=cy+(cy*$7);
  const skew_ang=($5/180)*pi;
  const mdist=tan(skew_ang)*pyth_img;
  const ang=($4/180)*pi;
  const cos_ang=cos(ang);
  const sin_ang=sin(ang);
  const cut_ang=atan2(cy,cy);
  const cut_ang2=pi-cut_ang;
  const total_width=$1+$2;
  const spacing=($2/(total_width-1))/2;
  
  rot_x(a,b)=a*cos_ang-b*sin_ang;
  rot_y(a,b)=a*sin_ang+b*cos_ang;
  fmod(a,b)=a-b*floor(a/b);
  
  const trimmed_ang=fmod(ang,pi);
  const nbars=((trimmed_ang>=cut_ang)&&(trimmed_ang<cut_ang2))?ceil((abs(1/sin(ang))*ww)/total_width):ceil((abs(1/cos(ang))*hh)/total_width);
  const shift_bars=int(nbars/2);
  
  v_base=vectornbars(0);
  v_shift=v_base;
  v_mult=v_base;
  v_modulo_mode=v_base;
  v_use_invert=v_base;
  
  $8!=0?fill(v_shift,u(-$8,$8));
  fill(v_mult,u($9,$10));
  fill(v_modulo_mode,round(u(0,2)));
  fill(v_use_invert,round(u(0,1))==1?1:-1 );
  if(narg($11),
   const outmode=$11%3;
   outmode==2?v_modulo_mode=vectornbars(2):
   v_modulo_mode=vectornbars(1);
  );
 );
 initial_x=(x-ox)/ww*sx;
 initial_y=(y-oy)/hh*sy;
 gradient=rot_y(initial_x,initial_y)*hh_div_sy/pyth_img;
 point_x=rot_x(initial_x,initial_y)*ww_div_sx+gradient*mdist;
 bars=(floor(point_x/total_width)+shift_bars)%nbars;
 spaces=abs(fmod(point_x,total_width)/total_width-.5)>=spacing;
 spaces?(
  new_gradient=gradient*v_use_invert[bars]*v_mult[bars]+v_shift[bars];
  fmod(new_gradient,10);
 );
 "

 

As you can see the code is different.

 

Edited May 18, 2021 by Reptillian

[Reptillian]

More has been done for gradient bars. Now, featuring random gradient mode.

 

TODO:

1. Symmetry Mode
2. Color Input

[Ego Eram Reputo]

Oooo. I like that!

[Reptillian]

@Ego Eram Reputo @lynxster4 Thank you for the feedback.

 

So far, the gradient bars is nearly done. For proof (I got duotone color to work):

 

 

TODO:

 

1. Add Duotone option for spaces.

2. Add animation support.

 

For such a simple idea, that's a lot of work. Maybe for just spaces filling, I could just make a separate command for that, and then combine both as a gui filter.

 

Side note:

 

Lyupanov Fractal is under work

 

Edited May 23, 2021 by Reptillian

[lynxster4]

You are busy, busy, busy @Reptillian!  Keep up the good work...we all appreciate very much!  👍 😊

 

[Reptillian]

Sorry for more teases, but I think the HSV version of random gradient bars looks excellent.

 

It will be released tonight or tomorrow or soon without animation support.

Edited May 24, 2021 by Reptillian

[Reptillian]

EDIT : New Filter! - Random Gradient Bar

 

 

 

Edited May 25, 2021 by Reptillian

[Reptillian]

Someone requested that I release Dungeon Tiles filter. I released it.

 

Here's the preview:

 

 

[Reptillian]

Just leaving this here -

 

 

More work in Lyapunov.

Edited June 9, 2021 by Reptillian

[Reptillian]

Made random color mode #1.

 

 

Random color mode #2 will come next.

[Reptillian]

Other than the Lyapunov, I had fixed the Random Gradient Bars, it is now more controllable there. But, this isn't noteworthy here because I had created the CodeLab version of the filter.

 

So, I will show that I made another coloring mode to Lyapunov Fractal.

 

 

Here's what is missing with the Lyapunov Fracta.

 

1) Custom coloring support. That means 2 more modes are TODO. One mode for defining colorings of negative/positive, and the other is a map toward the ranges of the Lyapunov Fractal.

2) Grayscale Mode. This means that it'll be the default output or negative output.

Edited June 20, 2021 by Reptillian

[Reptillian]

New Filter! - Weighted RGB To Grayscale

 

 

 

Based on MJW Black and White + PDN plugin, I have decided to make my own twist based on some of the principles found in that plugin. This is my own take on the ideas founded on that plugin.

 

The main difference is that it doesn't support color interpolation, and it doesn't need to in context of some image editors as they do support high depth, and the way Min-Max Interpolation behave.

 

@MJW - Do you want me to add credits within the GUI since I had only made the code just on principles?

[MJW]

7 minutes ago, Reptillian said:

Do you want me to add credits within the GUI since I had only made the code just on principles?

 

I appreciate your asking, but no credit needed.

[Reptillian]

Still more work into the Lyapunov Fractal.

 

 

This time this use 2 custom palette arguments. Also, palette can be generated via images.

Edited July 2, 2021 by Reptillian

[Reptillian]

New Filter! -  Markus-Lyapunov Fractal

 

Edited July 4, 2021 by Reptillian

[Reptillian]

Added a new filter - Rainbowify. It's not much a filter, but it's something.

 

 

 

 

 

 

[Reptillian]

I had fixed a bug with Construction Material Texture, now butterwoth bandpass will work. Also, the useless background color option has been completely replaced with seed.

[Reptillian]

Now, I had pushed a new version of Diffusion Limited Aggregation.

 

Changes according to commit log:

 

Quote

Upgrade to Diffusion Limited Aggregation

 

Changes:

1. The use of meta-coding to generate proper multi-threaded code on the fly. Much of the behavior of the very old single-threaded rep_dla has been retained, and much better retained in this version.

2. It is now fast enough that preview makes perfect sense.

3. Filter can be applied to multiple images.

 

Edited August 2, 2021 by Reptillian

[Reptillian]

Now, one of my dream filter is no longer just a dream, but turning into reality:

 

[lynxster4]

That is so cool @Reptillian!  It looks like a skeletonized alien head. I love it!  🥰

I take it, this is for GMIC?

[Reptillian]

1 minute ago, lynxster4 said:

That is so cool @Reptillian!  It looks like a skeletonized alien head. I love it!  🥰

I take it, this is for GMIC?

 

Yes, and it will also be available as a g'mic-pdn plugin.

[Ego Eram Reputo]

6 hours ago, lynxster4 said:

That is so cool @Reptillian!  It looks like a skeletonized alien head. I love it!  🥰

 

Agreed. It's very H R Geiger