Ninepence for MATHMAP.

lylejk · **Joined:** Sep 24, 2010 **Posts:** 12850

Thanks a heap SP. Works great (and it's fast).

lylejk · **Joined:** Sep 24, 2010 **Posts:** 12850

Why not another one.

ref: http://lylejk.deviantart.com/art/Pepper ... -513939238

lylejk · **Joined:** Sep 24, 2010 **Posts:** 12850

OK; held back a bit. I originally created this preset using Mathmap Composer (combined several presets into one). Indeed, it can do everything that Moon2Pan can but much, much more (i.e., if you just want Moon2Pan, that's actually the default settings). Also, need the wrap ability for this preset too, Souphead. Again, it's more involved so might be a pain to implement. The result are vortex renders such as the Blackberry hole (lol). Note the extended range of the span; this is great for multi-pole droste like output.

Code: Select all

# by Alexander Heide <[email protected]>
# see http://www.physik.uni-halle.de/~heide/crystal/crystal.html
pixel filter rotation (pixel image in,
                       float x_center: -1024-1024 (0), float y_center: -1024-1024 (0),
                       float psi: 0-3.141592 (0), float theta: -3.141592-3.141592 (0),
                       float radius: 1-2048 (2048),
                       float x_shift: -2048-2048 (0), float y_shift: -2048-2048 (0),
                       float zoom: -1-1 (0))
    x0=x_center-X;
    y0=-(y_center-Y);

    rad=radius;

    xs=-x_shift;
    ys=-y_shift;
    s=-zoom;

    xy1=xy*10^s+xy:[xs,ys];

    pxy=xy1-xy:[x0,y0];

    pxy=pxy/rad;
    psq=pxy[0]^2+pxy[1]^2;
    xi=2*pxy[0]/(1+psq);
    eta=2*pxy[1]/(1+psq);
    zeta=(1-psq)/(1+psq);

    xi1=cos(psi)*xi+sin(psi)*eta;
    eta1=-sin(psi)*xi+cos(psi)*eta;
    zeta1=zeta;

    xi=xi1;
    eta=cos(theta)*eta1+sin(theta)*zeta1;
    zeta=-sin(theta)*eta1+cos(theta)*zeta1;

    xi1=cos(psi)*xi-sin(psi)*eta;
    eta1=sin(psi)*xi+cos(psi)*eta;
    zeta1=zeta;

    px=xi1/(1+zeta1)*rad+x0;
    py=eta1/(1+zeta1)*rad+y0;

    in(xy:[px,py])
end


filter moon2panorama(
         image in,
         bool center_help (0),
         float center_x: -20-20 (0),
         float center_y: -20-20 (0),
         float span: 0-1450 (360),
         float shift_x: -200-200 (0),
         float shift_y: -200-200 (0)
     )
     scaled = ri:[x, y/(1+9*center_help)]/W*span;
     shifted = (scaled - ri:[shift_x, shift_y])*pi/180;
     remapped = I*exp(-I*shifted);
     centered = (remapped*0.8+ri:[center_x, center_y]/100)*min(X, Y);
     if center_help && abs(y/Y) < 0.01 then
         rgbColor(1, 1, 0)
     else
         in(xy:[centered[0], centered[1]])
     end
end

filter untitled_composition (bool moon2panorama_center_help (0), float moon2panorama_center_x : -20.000000 - 20.000000 (0.000000), float moon2panorama_center_y : -20.000000 - 20.000000 (0.000000), float moon2panorama_span : 0.000000 - 1450.000000 (360.000000), float moon2panorama_shift_x : -200.000000 - 200.000000 (0.000000), float moon2panorama_shift_y : -200.000000 - 200.000000 (0.000000), image rotation_in, float rotation_x_center : -1024.000000 - 1024.000000 (0.000000), float rotation_y_center : -1024.000000 - 1024.000000 (0.000000), float rotation_psi : 0.000000 - 3.141592 (0.000000), float rotation_theta : -3.141592 - 3.141592 (0.000000), float rotation_radius : 1.000000 - 2048.000000 (2048.000000), float rotation_x_shift : -2048.000000 - 2048.000000 (0.000000), float rotation_y_shift : -2048.000000 - 2048.000000 (0.000000), float rotation_zoom : -1.000000 - 1.000000 (0.000000))
    rotation_out = rotation(rotation_in, rotation_x_center, rotation_y_center, rotation_psi, rotation_theta, rotation_radius, rotation_x_shift, rotation_y_shift, rotation_zoom);
    moon2panorama_out = moon2panorama(rotation_out, moon2panorama_center_help, moon2panorama_center_x, moon2panorama_center_y, moon2panorama_span, moon2panorama_shift_x, moon2panorama_shift_y);
    moon2panorama_out(xy)
end


filter __composer_filter__ (bool untitled_composition_moon2panorama_center_help (0), float untitled_composition_moon2panorama_center_x : -20.000000 - 20.000000 (0.000000), float untitled_composition_moon2panorama_center_y : -20.000000 - 20.000000 (0.000000), float untitled_composition_moon2panorama_span : 0.000000 - 1450.000000 (360.000000), float untitled_composition_moon2panorama_shift_x : -200.000000 - 200.000000 (0.000000), float untitled_composition_moon2panorama_shift_y : -200.000000 - 200.000000 (0.000000), image untitled_composition_rotation_in, float untitled_composition_rotation_x_center : -1024.000000 - 1024.000000 (0.000000), float untitled_composition_rotation_y_center : -1024.000000 - 1024.000000 (0.000000), float untitled_composition_rotation_psi : 0.000000 - 3.141592 (0.000000), float untitled_composition_rotation_theta : -3.141592 - 3.141592 (0.000000), float untitled_composition_rotation_radius : 1.000000 - 2048.000000 (2048.000000), float untitled_composition_rotation_x_shift : -2048.000000 - 2048.000000 (0.000000), float untitled_composition_rotation_y_shift : -2048.000000 - 2048.000000 (0.000000), float untitled_composition_rotation_zoom : -1.000000 - 1.000000 (0.000000))
    untitled_composition_out = untitled_composition(untitled_composition_moon2panorama_center_help, untitled_composition_moon2panorama_center_x, untitled_composition_moon2panorama_center_y, untitled_composition_moon2panorama_span, untitled_composition_moon2panorama_shift_x, untitled_composition_moon2panorama_shift_y, untitled_composition_rotation_in, untitled_composition_rotation_x_center, untitled_composition_rotation_y_center, untitled_composition_rotation_psi, untitled_composition_rotation_theta, untitled_composition_rotation_radius, untitled_composition_rotation_x_shift, untitled_composition_rotation_y_shift, untitled_composition_rotation_zoom);
    untitled_composition_out(xy)
end

Souphead · **Joined:** Dec 19, 2015 **Posts:** 46

Can you post a picture of what it looks like on composer as when I paste this into the expression window I don't see anything in composer. Is the first filter in the chain "rotation" or "moon2panorama"? While I wait, I'll work on rotate.

Souphead.

lylejk · **Joined:** Sep 24, 2010 **Posts:** 12850

OK souphead. The trick to using this preset is to disable aliasing and make sure you have an alpha channel. Then you can heal the transparent artifacts. Of course, I toyed with the settings to get the cranberry vortex. lol

The default will be moon to panarama. I use this preset only now since I can do everything from perspective to vortexes.

Souphead · **Joined:** Dec 19, 2015 **Posts:** 46

I think I've done it but I haven't come across a set of parameter values that produces a blackberry (or cranberry) vortex. Can you give me your parameter values so I can verify it.

Souphead.

lylejk · **Joined:** Sep 24, 2010 **Posts:** 12850

OK Souphead. For the Blackberry hole, I recreated (eyeballed) using this texture and then the following settings.