[User]
Okay, I'd like a parametric OpenSCAD design for creating custom text storage boxes. The main idea is to have letters form containers, with each letter being a separate container that's connected to the others, and that also has its own matching lid.

Here's the breakdown of what I need:

**Core Functionality**
*   The user should be able to specify the text.
*   The letters should be extruded to a given height, forming the walls of the container.
*   All the letters, and any dots from 'i' and 'j', should be connected at the base, so that everything prints as one single piece and doesn't fall apart. There are two options for connecting the letters: either a rounded base that merges letters, or a thin bar that connects the bottoms of each letter. The user should be able to switch between these two options.

**Text Customization**
*   The user should be able to select a font from a fairly large list of Google Fonts. Bold fonts should be at the top of the list, with thinner fonts below a dashed separator.
*   The user should be able to set the text size (font size, basically) and the text extrusion height.

**Base Customization**
*   For the connecting bar, the user should control the extrusion height as a percentage of the text height and also the thickness of the bar as a percentage of the font size.
*   For the rounded base, the user should control an additional 'base radius' increase that makes the letters smoothly merge.

**Lid Customization**
*   The lids should match the text and container shapes.
*   The lids should be slightly larger than their respective letter containers, to allow for easy removal, and should also have a lip that fits inside the container. The user should be able to control the extra size of the lids (the 'bigger' amount), the tolerance wiggle room, and the length of the lid lip.
*   The user should be able to switch between printing only the letter containers, only the lids, or both.

**Additional Notes**
*   The user should be able to control the wall thickness.
*   The program should include an automatic mechanism to check if the given text contains any "i" or "j" letters, and then either shift the base of the font up or down to connect the dots of the i and j, or not move the font if there are no i or j's. The user should also have the option to force shifting or not shifting, regardless of the letters actually present.
*   The amount of the shift, if any, should be user-controllable and specified as a percentage of the text size.

I think that about covers everything. Let me know if I need to clarify anything. I'm not using any external libraries, by the way - this is all vanilla OpenSCAD. Thanks!

[Assistant]
TextStorageBox2_V9.scad:
```
//Set the text to render
textstring="Dalia";

//Font name. In the list is first a selection of bold fonts. After the dashed line you get a list of thinner fonts, which are not really recommended.
fontname="Holtwood One SC"; //[Holtwood One SC,Alegreya Sans SC Black,Alfa Slab One,Asset,Black Ops One,Bowlby One,Bowlby One SC,Chango,Cinzel Decorative Black,Coustard,Elsie Black,Elsie Swash Caps Black,Erica One,Exo2 Black,Fascinate,Lobster,PassionOne,Plaster,Poller One,Rammetto One,Ruslan Display,Sarpanch Black,Sigmar One,Sonsie One,Titan One,Ultra,Hanalei,---------,ABeeZee,Abel,Abril Fatface,Aclonica,Acme,Actor,Adamina,Advent Pro,Aguafina Script,Akronim,Aladin,Aldrich,Alef,Alex Brush,Alice,Alike,Alike Angular,Allan,Allerta,Allerta Stencil,Allura,Almendra,Almendra Display,Almendra SC,Amarante,Amaranth,Amatic SC,Amethysta,Amiri,Anaheim,Andada,Andika,Angkor,Annie Use Your Telescope,Anonymous Pro,Antic,Antic Didone,Antic Slab,Anton,Arapey,Arbutus,Arbutus Slab,Architects Daughter,Archivo Black,Archivo Narrow,Arimo,Arizonia,Armata,Artifika,Arvo,Asap,Asset,Astloch,Asul,Atomic Age,Aubrey,Audiowide,Autour One,Average,Average Sans,Averia Gruesa Libre,Averia Libre,Averia Sans Libre,Averia Serif Libre,Bad Script,Balthazar,Bangers,Basic,Battambang,Baumans,Bayon,Belgrano,Belleza,BenchNine,Bentham,Berkshire Swash,Bevan,Bigelow Rules,Bigshot One,Bilbo,Bilbo Swash Caps,Bitter,Black Ops One,Bokor,Bonbon,Boogaloo,Bowlby One,Bowlby One SC,Brawler,Bree Serif,Bubblegum Sans,Bubbler One,Buda,Buenard,Butcherman,Butterfly Kids,Cabin,Cabin Condensed,Cabin Sketch,Caesar Dressing,Cagliostro,Calligraffitti,Cambay,Cambo,Candal,Cantarell,Cantata One,Cantora One,Capriola,Cardo,Carme,Carrois Gothic,Carrois Gothic SC,Carter One,Caudex,Cedarville Cursive,Ceviche One,Changa One,Chango,Chau Philomene One,Chela One,Chelsea Market,Chenla,Cherry Cream Soda,Cherry Swash,Chewy,Chicle,Chivo,Cinzel,Cinzel Decorative,Clicker Script,Coda,Coda Caption,Codystar,Combo,Comfortaa,Coming Soon,Concert One,Condiment,Content,Contrail One,Convergence,Cookie,Copse,Corben,Courgette,Cousine,Coustard,Covered By Your Grace,Crafty Girls,Creepster,Crete Round,Crimson Text,Croissant One,Crushed,Cuprum,Cutive,Cutive Mono,Damion,Dancing Script,Dangrek,Dawning of a New Day,Days One,Dekko,Delius,Delius Swash Caps,Delius Unicase,Della Respira,Denk One,Devonshire,Dhurjati,Didact Gothic,Diplomata,Diplomata SC,Domine,Donegal One,Doppio One,Dorsa,Dosis,Dr Sugiyama,Droid Sans,Droid Sans Mono,Droid Serif,Duru Sans,Dynalight,Eagle Lake,Eater,EB Garamond,Economica,Ek Mukta,Electrolize,Elsie,Elsie Swash Caps,Emblema One,Emilys Candy,Engagement,Englebert,Enriqueta,Erica One,Esteban,Euphoria Script,Ewert,Exo,Exo 2,Expletus Sans,Fanwood Text,Fascinate,Fascinate Inline,Faster One,Fasthand,Fauna One,Federant,Federo,Felipa,Fenix,Finger Paint,Fira Mono,Fira Sans,Fjalla One,Fjord One,Flamenco,Flavors,Fondamento,Fontdiner Swanky,Forum,Francois One,Freckle Face,Fredericka the Great,Fredoka One,Freehand,Fresca,Frijole,Fruktur,Fugaz One,Gabriela,Gafata,Galdeano,Galindo,Gentium Basic,Gentium Book Basic,Geo,Geostar,Geostar Fill,Germania One,GFS Didot,GFS Neohellenic,Gidugu,Gilda Display,Give You Glory,Glass Antiqua,Glegoo,Gloria Hallelujah,Goblin One,Gochi Hand,Gorditas,Goudy Bookletter 1911,Graduate,Grand Hotel,Gravitas One,Great Vibes,Griffy,Gruppo,Gudea,Gurajada,Habibi,Halant,Hammersmith One,Hanalei,Hanalei Fill,Handlee,Hanuman,Happy Monkey,Headland One,Henny Penny,Herr Von Muellerhoff,Hind,Homemade Apple,Homenaje,Iceberg,Iceland,IM Fell Double Pica,IM Fell Double Pica SC,IM Fell DW Pica,IM Fell DW Pica SC,IM Fell English,IM Fell English SC,IM Fell French Canon,IM Fell French Canon SC,IM Fell Great Primer,IM Fell Great Primer SC,Imprima,Inconsolata,Inder,Indie Flower,Inika,Irish Grover,Istok Web,Italiana,Italianno,Jacques Francois,Jacques Francois Shadow,Jim Nightshade,Jockey One,Jolly Lodger,Josefin Sans,Josefin Slab,Joti One,Judson,Julee,Julius Sans One,Junge,Jura,Just Another Hand,Just Me Again Down Here,Kalam,Kameron,Kantumruy,Karla,Karma,Kaushan Script,Kavoon,Kdam Thmor,Keania One,Kelly Slab,Kenia,Khand,Khmer,Khula,Kite One,Knewave,Kotta One,Koulen,Kranky,Kreon,Kristi,Krona One,La Belle Aurore,Laila,Lakki Reddy,Lancelot,Lateef,Lato,League Script,Leckerli One,Ledger,Lekton,Lemon,Liberation Sans,Libre Baskerville,Life Savers,Lilita One,Lily Script One,Limelight,Linden Hill,Lobster,Lobster Two,Londrina Outline,Londrina Shadow,Londrina Sketch,Londrina Solid,Lora,Love Ya Like A Sister,Loved by the King,Lovers Quarrel,Luckiest Guy,Lusitana,Lustria,Macondo,Macondo Swash Caps,Magra,Maiden Orange,Mako,Mallanna,Mandali,Marcellus,Marcellus SC,Marck Script,Margarine,Marko One,Marmelad,Martel Sans,Marvel,Mate,Mate SC,Maven Pro,McLaren,Meddon,MedievalSharp,Medula One,Megrim,Meie Script,Merienda,Merienda One,Merriweather,Merriweather Sans,Metal,Metal Mania,Metamorphous,Metrophobic,Michroma,Milonga,Miltonian,Miltonian Tattoo,Miniver,Miss Fajardose,Modak,Modern Antiqua,Molengo,Molle,Monda,Monofett,Monoton,Monsieur La Doulaise,Montaga,Montez,Montserrat,Montserrat Alternates,Montserrat Subrayada,Moul,Moulpali,Mountains of Christmas,Mouse Memoirs,Mr Bedfort,Mr Dafoe,Mr De Haviland,Mrs Saint Delafield,Mrs Sheppards,Muli,Mystery Quest,Neucha,Neuton,New Rocker,News Cycle,Niconne,Nixie One,Nobile,Nokora,Norican,Nosifer,Nothing You Could Do,Noticia Text,Noto Sans,Noto Serif,Nova Cut,Nova Flat,Nova Mono,Nova Oval,Nova Round,Nova Script,Nova Slim,Nova Square,NTR,Numans,Nunito,Odor Mean Chey,Offside,Old Standard TT,Oldenburg,Oleo Script,Oleo Script Swash Caps,Open Sans,Open Sans Condensed,Oranienbaum,Orbitron,Oregano,Orienta,Original Surfer,Oswald,Over the Rainbow,Overlock,Overlock SC,Ovo,Oxygen,Oxygen Mono,Pacifico,Paprika,Parisienne,Passero One,Passion One,Pathway Gothic One,Patrick Hand,Patrick Hand SC,Patua One,Paytone One,Peddana,Peralta,Permanent Marker,Petit Formal Script,Petrona,Philosopher,Piedra,Pinyon Script,Pirata One,Plaster,Play,Playball,Playfair Display,Playfair Display SC,Podkova,Poiret One,Poller One,Poly,Pompiere,Pontano Sans,Port Lligat Sans,Port Lligat Slab,Prata,Preahvihear,Press Start 2P,Princess Sofia,Prociono,Prosto One,PT Mono,PT Sans,PT Sans Caption,PT Sans Narrow,PT Serif,PT Serif Caption,Puritan,Purple Purse,Quando,Quantico,Quattrocento,Quattrocento Sans,Questrial,Quicksand,Quintessential,Qwigley,Racing Sans One,Radley,Rajdhani,Raleway,Raleway Dots,Ramabhadra,Ramaraja,Rambla,Rammetto One,Ranchers,Rancho,Ranga,Rationale,Ravi Prakash,Redressed,Reenie Beanie,Revalia,Ribeye,Ribeye Marrow,Righteous,Risque,Roboto,Roboto Condensed,Roboto Slab,Rochester,Rock Salt,Rokkitt,Romanesco,Ropa Sans,Rosario,Rosarivo,Rouge Script,Rozha One,Rubik Mono One,Rubik One,Ruda,Rufina,Ruge Boogie,Ruluko,Rum Raisin,Ruslan Display,Russo One,Ruthie,Rye,Sacramento,Sail,Salsa,Sanchez,Sancreek,Sansita One,Sarina,Sarpanch,Satisfy,Scada,Scheherazade,Schoolbell,Seaweed Script,Sevillana,Seymour One,Shadows Into Light,Shadows Into Light Two,Shanti,Share,Share Tech,Share Tech Mono,Shojumaru,Short Stack,Siemreap,Sigmar One,Signika,Signika Negative,Simonetta,Sintony,Sirin Stencil,Six Caps,Skranji,Slabo 13px,Slabo 27px,Slackey,Smokum,Smythe,Sniglet,Snippet,Snowburst One,Sofadi One,Sofia,Sonsie One,Sorts Mill Goudy,Source Code Pro,Source Sans Pro,Source Serif Pro,Special Elite,Spicy Rice,Spinnaker,Spirax,Squada One,Sree Krushnadevaraya,Stalemate,Stalinist One,Stardos Stencil,Stint Ultra Condensed,Stint Ultra Expanded,Stoke,Strait,Sue Ellen Francisco,Sunshiney,Supermercado One,Suranna,Suravaram,Suwannaphum,Swanky and Moo Moo,Syncopate,Tangerine,Taprom,Tauri,Teko,Telex,Tenali Ramakrishna,Tenor Sans,Text Me One,The Girl Next Door,Tienne,Timmana,Tinos,Titan One,Titillium Web,Trade Winds,Trocchi,Trochut,Trykker,Tulpen One,Ubuntu,Ubuntu Condensed,Ubuntu Mono,Ultra,Uncial Antiqua,Underdog,Unica One,UnifrakturCook,UnifrakturMaguntia,Unkempt,Unlock,Unna,Vampiro One,Varela,Varela Round,Vast Shadow,Vesper Libre,Vibur,Vidaloka,Viga,Voces,Volkhov,Vollkorn,Voltaire,VT323,Waiting for the Sunrise,Wallpoet,Walter Turncoat,Warnes,Wellfleet,Wendy One,Wire One,Yanone Kaffeesatz,Yellowtail,Yeseva One,Yesteryear,Zeyada]

//Which parts to print?
Parts="Everything"; //[Everything, Bottom_only, Lids_only]

//Use a rounded base to connect all letters or use a connecting bar?
RoundedBase=0; //[0, 1]

//Shift the font up/down to connect i and j dots? Select "no" if you have no i or j in your text.
do_shift_font="automatic"; //[automatic,yes,no]

//Set font size in mm
textsize=30;

//Text height (extrusion) in mm
textheight=10;

//wall thickness
wall=1;

//Connecting bar height (extrusion in print direction) in percent of the text height
baseheight_percent=.33;
baseheight=textheight*baseheight_percent;

//Connecting bar thickness in percent of the font size
basethickness_percent=0.1;
basethickness=textsize*basethickness_percent;

//Amount to shift the font up/down to connect i and j dots for printing.
shift_font_percent=0.07;
shift_font=textsize*shift_font_percent;

//Only for a rounded base: Base increase size to make letters meet, in percent of the textsize
base_radius_add_percent=.1;
base_radius_add=textsize*base_radius_add_percent;

//lid bigger so we can remove it
bigger=.3;

//lid wiggle so it fits
wiggle=.45;

//lid holding rim
lidliplength=2;

/* [Hidden] */
//-------------------------------------------------------------------------------

iorj = [ for (i = [0 : len(textstring) - 1]) if (textstring[i]=="i" || textstring[i]=="j") 1 ];

dummy_cutoutlen=len(textstring)*textsize;

/*
Customizable Text Storage Box
Version 9, December 2018
Written by MC Geisler (mcgenki at gmail dot com)

If you need to store Stuff in letters, this is the way to go.
Each letter and also the dots of 'i' and 'j' are connected together, so after printing it will not fall apart.
Have fun!

License: Attribution 4.0 International (CC BY 4.0)

You are free to:
    Share - copy and redistribute the material in any medium or format
    Adapt - remix, transform, and build upon the material
    for any purpose, even commercially.
*/

module writetext(textstr, sizeit)
{
    text(textstr,size=sizeit*.9,font=fontname,halign="center",valign="baseline");
}

module RiseText(textstr, textsize,textheight)
{
    difference()
    {
        union()
        {
            linear_extrude(height=textheight,convexity = 32)
                writetext(textstr, textsize);

            //create base
            if(RoundedBase==0)
            {
                //base line to connect
                linear_extrude(height=baseheight, twist=0, slices=1, $fn=32, convexity = 15)
                    hull()
                        intersection()
                        {
                            writetext(textstr, textsize);

                            //translate([0,-textsize/2+basethickness/2+base_offset,0])
                            translate([0,basethickness/2,0])
                               square([dummy_cutoutlen,basethickness],center=true);
                        }

                if ( (do_shift_font=="automatic" && iorj[0]==1 && fontname!="Holtwood One SC") || do_shift_font=="yes")
                {
                    //connect i and j dots
                    intersection()
                    {
                        union()
                        {
                            translate([0,-shift_font,0])
                                linear_extrude(height=baseheight/2,convexity = 15)
                                    writetext(textstr, textsize);

                            translate([0,shift_font,0])
                                linear_extrude(height=baseheight/2,convexity = 15)
                                    writetext(textstr, textsize);
                        }

                        //TODO: Fix font size and this below for text function
                         translate([0,textsize/2,baseheight/2])
                            cube([dummy_cutoutlen,textsize,baseheight],center=true);
                   }
               }

            }
            else
            {
                        linear_extrude(height=baseheight, twist=0, slices=1, $fn=32, convexity = 15)
                            offset(r = base_radius_add)
                            {
                                writetext(textstr, textsize);
                            }
            }
        }

        translate([0,0,wall])
            linear_extrude(height=textheight+2,convexity = 32)
                offset(delta=-wall)
                    writetext(textstr, textsize);
    }
}

module LidText(textstr, textsize,textheight)
{
    linear_extrude(height=textheight,convexity = 32)
        offset(delta=bigger)
            rotate([0,180,0])
                writetext(textstr, textsize);

    difference()
    {
        lidIn=wall+wiggle;
        lidWidth=wall;

        linear_extrude(height=textheight+lidliplength,convexity = 32)
            offset(delta=-lidIn)
                rotate([0,180,0])
                    writetext(textstr, textsize);

        linear_extrude(height=textheight+lidliplength+1,convexity = 32)
            offset(delta=-(lidIn+lidWidth))
                rotate([0,180,0])
                    writetext(textstr, textsize);
    }
}

if (Parts=="Bottom_only" || Parts=="Everything")
{
    RiseText(textstring,textsize,textheight);
}

if (Parts=="Lids_only" || Parts=="Everything")
{
    translate([0,textsize+2+2*base_radius_add,0])
        LidText(textstring,textsize,1);
}
```


[User]
Okay, I'd like to design a bag sealer using OpenSCAD, and I need it to be parametric so I can easily adjust the size and fit. I'm thinking of a two-part design, a clip and an insert, that will work together to seal bags by clamping them shut.

Here are the key things I need:

*   **Two Parts:** The design should consist of two distinct parts: a "clip" and an "insert."
*   **Parametric Length:** I need a parameter `length` (in millimeters) to control the overall length of the clip and insert.
*   **Parametric Gap:** There should be a `gap` parameter, also in millimeters, that determines the width of the gap where the bag is placed. I understand this gap will effectively shrink by about 0.75mm when the insert is pushed in.
*   **Optional Nubs:** I want to be able to add "nubs" to the design to make it easier to push the clip and insert apart. This should be controlled by a boolean parameter, probably `nubs`. If it's true, add the nubs; otherwise, leave them out.
*   **Heavy Duty Option:** I'd like a parameter, say `heavy_duty`, that I can use to make the clip more robust. When this is enabled, the insert should have less material removed from it.
*   **Generate Option:** I need a parameter, maybe `generate`, that allows me to choose what to generate: "both" parts, only the "clip", or only the "insert".

I also have some specific design ideas:
    *   The clip part should have a main body, plus an extra bit at the top that will go past the insert once it's closed, kind of like a hook.
    *   The insert should be able to fit snugly into the clip, providing the clamping action.
    *   I would like to cut out some material inside the insert to reduce plastic usage.
    *   Both parts should be centered.

I'm thinking I need a few modules: `clipPoly` to create the 2D shape of the clip, `insertPoly` for the insert, and `nub` for the optional nubs.

Could you provide the OpenSCAD code for this design? I don't need any special libraries. I need to generate `BagSealer.scad`.

[Assistant]
BagSealer_v3.scad:
```
// Bag sealer v3 by DrLex, 2017/10- 2018/11
// Released under Creative Commons - Attribution license

// Length of the clip in millimeters
length = 10;

// Width of the open gap. The gap will become about 0.75mm narrower with the insert in place. A good value is the thickness of the folded bag plus 0.5mm.
gap = 0.8; //[.1:.05:3]

// Generate extra 'nubs' that make it easier to push the parts out of each other?
nubs = "yes"; //[yes,no]

// Enable this to create a stronger model (requires more material to print).
heavy_duty = "no"; //[yes,no]

// Generate what parts?
generate = "both"; //[both,clip,insert]

/* [Hidden] */
doNubs = nubs == "yes" ? true : false;
saveMaterial = heavy_duty == "yes" ? false : true;
shiftXtra = doNubs ? 1 : 0;
shiftClip = generate == "both" ? 7 + shiftXtra : 0;
shiftInsert = generate == "both" ? -(3 + shiftXtra) : 4;

if(generate == "both" || generate == "clip") {
    translate([0, shiftClip, 0]) {
        difference() {
            rotate([90, 0, 90]) linear_extrude(length, center=true, convexity=6) clipPoly(gap);
            translate([length/2+.1, 1.7+gap, 16.1]) rotate([0,45,0]) cube(3.5, center=true);
            translate([-length/2-.1, 1.7+gap, 16.1]) rotate([0,45,0]) cube(3.5, center=true);

            if(doNubs) {
                translate([length/2-1, -6.5, -.5]) cube([2, 2, 3.4]);
                translate([-length/2-1, -6.5, -.5]) cube([2, 2, 3.4]);
            }
        }
        if(doNubs) {
            translate([length/2, 0, 0]) nub(3);
            translate([-length/2, 0, 0]) mirror([1, 0, 0]) nub(3);
        }
    }
}
if(generate == "both" || generate == "insert") {
    translate([0, shiftInsert, 0]) {
        difference() {
            rotate([90, 0, 90]) linear_extrude(length, center=true, convexity=6) insertPoly();

            if(doNubs) {
                translate([length/2-3, -10, -.5]) cube([6, 4.12, 3.4]);
                translate([-length/2-3, -10, -.5]) cube([6, 4.12, 3.4]);
            }

            if(saveMaterial && length > 25) {
                translate([0, -9.5, -1]) {
                    hull() {
                        translate([-length/2 + 13, 0, 0]) cylinder(r=5, h=10, $fn=48);
                        translate([length/2 - 13, 0, 0]) cylinder(r=5, h=10, $fn=48);
                        translate([-length/2 + 7.7, .2, 0]) cube([1,1,10], h=10, center=true);
                        translate([length/2 - 7.7, .2, 0]) cube([1,1,10], h=10, center=true);
                    }
                }
            }
        }
        if(doNubs) {
            translate([length/2, -1.25, 0]) nub(2.6);
            translate([-length/2, -1.25, 0]) mirror([1, 0, 0]) nub(2.6);
        }
    }
}

module nub(h) {
    minkowski() {
        difference() {
            translate([-6, -7.5, 0]) cube([5, 3, h-1]);
            translate([0, -8.5, -.5]) cylinder(r=4, h=4, $fn=32);
        }
        cylinder(r=1, h=1, $fn=16);
    }
}

module clipPoly(ox) {
    polygon(convexity=6, points=[
    [0.0, 1.2],
    [0.0, 10.45],
    [0.4, 11.7],
    [0.4, 12.7],
    [0.0, 13.95],
    [0.0, 16.0],
    [-0.79, 16.0],
    [-0.79, 3.4],
    [-0.99, 2.4],
    [-0.99, 1.2],
    [-2.24, 1.2],
    [-2.74, 1.72],
    [-2.74, 11.6],
    [-3.04, 11.6],
    [-3.04, 12.9299],
    [-2.74, 13.35],
    [-2.74, 15.2],
    [-3.2737, 16.0],
    [-3.89, 16.0],
    [-4.29, 15.6],
    [-4.29, 13.35],
    [-4.49, 12.9299],
    [-4.49, 11.7],
    [-4.29, 11.2799],
    [-4.29, 3.8146],
    [-4.3146, 3.6169],
    [-4.382, 3.4007],
    [-4.474, 3.224],
    [-5.106, 2.3078],
    [-5.198, 2.1311],
    [-5.2654, 1.9149],
    [-5.29, 1.7172],
    [-5.29, 0.48],
    [-5.2535, 0.2963],
    [-5.1494, 0.1406],
    [-4.9937, 0.0365],
    [-4.81, 0.0],

    [1.87+ox, 0.0],
    [2.0537+ox, 0.0365],
    [2.2094+ox, 0.1406],
    [2.3135+ox, 0.2963],
    [2.35+ox, 0.48],
    [2.35+ox, 1.7172],
    [2.3232+ox, 1.8854],
    [2.25+ox, 2.0621],
    [2.15+ox, 2.2],
    [2.05+ox, 2.3379],
    [1.9768+ox, 2.5146],
    [1.95+ox, 2.6828],
    [1.95+ox, 15.6],
    [1.55+ox, 16.0],
    [0.6883+ox, 16.0],
    [ox, 15.0],
    [ox, 14.1],
    [0.4+ox, 12.775],
    [0.4+ox, 11.625],
    [ox, 10.3],
    [ox, 1.2]
    ]);
}

module insertPoly() {
    polygon(convexity=4, points=[
        [0.0, 0.6],
        [0.0, 3.5],
        [-0.2783, 8.7],
        [-1.1, 10.496],
        [-1.1, 16.4],
        [-2.05, 16.4],
        [-2.65, 15.8],
        [-2.65, 6.8],
        [-2.95, 6.8],
        [-2.95, 5.67],
        [-2.65, 5.25],
        [-2.65, 3.1523],
        [-3.1583, 2.4],
        [-8.15, 2.4],
        [-8.3796, 2.3543],
        [-8.5743, 2.2243],
        [-8.7043, 2.0296],
        [-8.75, 1.8],
        [-8.75, 0.6],
        [-8.7043, 0.3704],
        [-8.5743, 0.1757],
        [-8.3796, 0.0457],
        [-8.15, 0.0],
        [-0.6, 0.0],
        [-0.3704, 0.0457],
        [-0.1757, 0.1757],
        [-0.0457, 0.3704]
    ]);
}
```


[User]
I'd like to create a customizable 2D origami swan design using OpenSCAD. I'm envisioning a flat, laser-cuttable piece that could be used in picture frames or as jewelry.

Here are the specific parameters I'd like to control:

*   **Overall Size:**  I need to be able to set a maximum dimension (either width or height), and the other dimension should scale proportionally to maintain the swan's aspect ratio. I'll specify `max_size_in_millimeter` for this.
*   **Model Height:** This is the overall thickness of the flat model. I'll use `model_height_in_millimeter` for this.
*   **Outer Outline Thickness:** This should define the thickness of the material around the perimeter of the swan. This parameter will be `outline_size_in_millimeter`.
*   **Inner Outline Thickness:**  The thickness of the inner lines that give the swan detail. This is `inline_size_in_millimeter`.
*   **Inner Outline Edge Radius:** The roundness of the endpoints of the inner outlines, controlled by `inline_edge_radius_in_millimeter`.
*   **Flip Model:** An option to mirror the design along the vertical axis. I'll use a "yes" or "no" option for this variable (`flip_model`).

The base shape of the swan will come from a set of 2D points that will then be connected to make polygons for the outer shape and internal details. I can provide the specific coordinates for these points, which are:

**Outer Points:**
```
A1 = [143, 117];
A2 = [164, 65];
A3 = [204, 58];
A4 = [219, 76];
A5 = [236, 94];
A6 = [199, 186];
A7 = [254, 162];
A8 = [286, 186];
A9 = [363, 182];
A10 = [332, 218];
A11 = [350, 233];
A12 = [317, 235];
A13 = [311, 243];
A14 = [334, 276];
A15 = [281, 273];
A16 = [257, 299];
A17 = [169, 262];
A18 = [137, 182];
A19 = [193, 107];
A20 = [185, 78];
```

The outer shape will be created from these points in the order given, i.e. `outline = [A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20];`

**Inner Points:**
```
B1 = [272, 187];
```

**Inner Polygons:**
These are the combinations of the above points to generate the inner outlines.
```
C1 = [A1, A2, A3, A20];
C2 = [A20, A3, A4, A19];
C3 = [A5, A6, A17, A18, A19, A4];
C4 = [A6, A17, A15, A14, A13, B1, A7];
C5 = [A7, B1, A8];
C6 = [B1, A8, A9, A10, A12, A13];
C7 = [A10, A11, A12];
C8 = [A15, A16, A17];
```

The `cut_polygons` will be defined from these sets, i.e. `cut_polygons = [C1, C2, C3, C4, C5, C6, C7, C8];`

Essentially, I'm looking to create the outer shape and then subtract the inner polygons with some thickness and roundness applied to them to create a hollowed-out, line-drawing style design. I think this should be possible using linear_extrude for the depth, polygon for the outlines, and offset for the thickness. I will not be using any libraries.

[Assistant]
customizable_origami_swan.scad:
```
/*
 * Customizable Origami - Swan - https://www.thingiverse.com/thing:2627896
 * by Dennis Hofmann - https://www.thingiverse.com/mightynozzle/about
 * created 2017-11-06
 * version v1.0
 *
 * Changelog
 * --------------
 * v1.0:
 *      - final design
 * --------------
 *
 * This work is licensed under the Creative Commons - Attribution - NonCommercial - ShareAlike license.
 * https://creativecommons.org/licenses/by-nc-sa/3.0/
 */

 // Parameter Section //
//-------------------//

// preview[view:north, tilt:top]

// The maximum size of the longest side. The shorter side will be automatically resized in same ratio.
max_size_in_millimeter = 120; //[20:300]

// The height of the model.
model_height_in_millimeter = 5; //[0.2:0.2:100]

// Thickness of the outer outline.
outline_size_in_millimeter = 1.6; //[0.5:0.1:20]

// Thickness of the inner outline.
inline_size_in_millimeter = 0.7; //[0.5:0.1:20]

// Roundiness of the ends of the inner outlines.
inline_edge_radius_in_millimeter = 0.6; //[0.0:0.1:5]

// Flip model
flip_model = "no"; //[yes,no]

/*[hidden]*/
max_size = max_size_in_millimeter;
model_height = model_height_in_millimeter;
$fn=32;

// Outer Points
A1 = [143, 117];
A2 = [164, 65];
A3 = [204, 58];
A4 = [219, 76];
A5 = [236, 94];
A6 = [199, 186];
A7 = [254, 162];
A8 = [286, 186];
A9 = [363, 182];
A10 = [332, 218];
A11 = [350, 233];
A12 = [317, 235];
A13 = [311, 243];
A14 = [334, 276];
A15 = [281, 273];
A16 = [257, 299];
A17 = [169, 262];
A18 = [137, 182];
A19 = [193, 107];
A20 = [185, 78];

outline = [A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20];

// Inner Points
B1 = [272, 187];

// Polygons
C1 = [A1, A2, A3, A20];
C2 = [A20, A3, A4, A19];
C3 = [A5, A6, A17, A18, A19, A4];
C4 = [A6, A17, A15, A14, A13, B1, A7];
C5 = [A7, B1, A8];
C6 = [B1, A8, A9, A10, A12, A13];
C7 = [A10, A11, A12];
C8 = [A15, A16, A17];

cut_polygons = [C1, C2, C3, C4, C5, C6, C7, C8];

min_x = A18[0];
min_y = A3[1];
max_x = A9[0];
max_y = A16[1];

x_size = max_x - min_x;
y_size = max_y - min_y;

x_factor = max_size / x_size;
y_factor = max_size / y_size;

inline_size = x_size > y_size ? inline_size_in_millimeter / x_factor / 2: inline_size_in_millimeter / y_factor / 2;
inline_edge_radius = x_size > y_size ? inline_edge_radius_in_millimeter / x_factor: inline_edge_radius_in_millimeter / y_factor;
outline_size = x_size > y_size ? outline_size_in_millimeter / x_factor - inline_size: outline_size_in_millimeter / y_factor - inline_size;

 // Program Section //
//-----------------//

if(x_size > y_size) {
    resize(newsize=[max_size, x_factor * y_size, model_height]){
        if(flip_model == "yes") {
            mirror([0,1,0]) {
                rotate([180,180,0]) {
                    create(outline, cut_polygons);
                }
            }
        } else {
            create(outline, cut_polygons);
        }
    }
} else {
    resize(newsize=[y_factor * x_size, max_size, model_height]){
        if(flip_model == "yes") {
            mirror([0,1,0]) {
                rotate([180,180,0]) {
                    create(outline, cut_polygons);
                }
            }
        } else {
            create(outline, cut_polygons);
        }
    }
}

 // Module Section //
//----------------//

module create() {
    linear_extrude(height=1) {
        difference() {
            offset(r = -0) {
                offset(r = +outline_size) {
                    polygon(points = outline, convexity = 10);
                }
            }

            for(cut_polygon = [0:len(cut_polygons)]) {
                offset(r = +inline_edge_radius) {
                    offset(r = -inline_size - inline_edge_radius) {
                        polygon(points = cut_polygons[cut_polygon], convexity = 10);
                    }
                }
            }
        }
    }
}

```


[User]
I'd like to create a customizable 2D origami elephant using OpenSCAD, based on the design I've seen online. I need it to be parametric so I can adjust the size, outline thicknesses, and even flip it.

Here are the specific requirements:

*   **Overall Shape:** The basic elephant outline is defined by a series of points (A1 to A27), and there are also inner "cut" shapes defined by points (B1 to B10) and polygons (C1 to C12) using these points. I'll provide the coordinates for these in the code below.
*   **Customizable Size:**
    *   The user should be able to specify a `max_size_in_millimeter`, which will control the longest side of the elephant. The other dimension should be scaled proportionally to maintain the original aspect ratio.
    *   The height of the extruded model needs to be adjustable using `model_height_in_millimeter`.
*   **Outline Control:**
    *   The outer outline thickness should be adjustable with a `outline_size_in_millimeter` variable.
    *   The inner "cut" shapes should have an adjustable thickness with `inline_size_in_millimeter`.
    *   The corners of the inner outlines should have a configurable roundness set by  `inline_edge_radius_in_millimeter`.
*   **Flip Option:** I need a simple way to mirror the elephant along its vertical axis. I'd like a `flip_model` variable with "yes" or "no" options.
*   **Scaling:** The internal points and polygon definitions are in a coordinate system where the model's dimensions go up to approximately 2000 units. It will need to be scaled appropriately to the `max_size` parameter.

I'm not using any external libraries, so everything should be built into the primary .scad file, called `customizable_origami_elephant.scad`.

Here is the data:
```
// Outer Points
A1 = [38, 652];
A2 = [150, 342];
A3 = [372, 264];
A4 = [458, 222];
A5 = [914, 220];
A6 = [1132, 218];
A7 = [1140, 86];
A8 = [1418, 212];
A9 = [1730, 484];
A10 = [1638, 984];
A11 = [1800, 994];
A12 = [1860, 1042];
A13 = [1868, 1204];
A14 = [1816, 1070];
A15 = [1586, 1120];
A16 = [1476, 1024];
A17 = [1472, 1324];
A18 = [1414, 1316];
A19 = [1408, 1348];
A20 = [954, 1348];
A21 = [856, 1264];
A22 = [814, 1306];
A23 = [762, 1314];
A24 = [714, 1348];
A25 = [422, 1348];
A26 = [134, 790];
A27 = [164, 544];

outline = [A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27];

// Inner Points
B1 = [184, 378];
B2 = [832, 1232];
B3 = [908, 1152];
B4 = [1012, 628];
B5 = [1016, 406];
B6 = [1412, 790];
B7 = [1456, 790];
B8 = [1584, 724];
B9 = [1690, 466];
B10 = [1602, 996];

// Polygons
C1 = [A1, A2, A3, B1];
C2 = [A1, A27, B1];
C3 = [A26, A27, B1, A3, A4, A5, B3, B2, A23, A24, A25];
C4 = [A23, A22, A21, B2];
C5 = [A5, A6, A8, B5, B4, B6, A18, A19, A20, A21, B2, B3];
C6 = [B5, A8, B9, B8, B7, B6, B4];
C7 = [A6, A7, A8];
C8 = [B9, A9, A10, B10];
C9 = [B10, A10, A11, A12, A14, A15];
C10 = [A14, A12, A13];
C11 = [A17, A18, B6, B7, A16];
C12 = [B7, B8, B9, B10, A15, A16];

cut_polygons = [C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12];

```

I'd like the generated code to be well-commented, please, so I can follow along.

[Assistant]
customizable_origami_elephant.scad:
```
/*
 * Customizable Origami - Elephant - https://www.thingiverse.com/thing:2629988
 * by Dennis Hofmann - https://www.thingiverse.com/mightynozzle/about
 * created 2017-11-06
 * version v1.0
 *
 * Changelog
 * --------------
 * v1.0:
 *      - final design
 * --------------
 *
 * This work is licensed under the Creative Commons - Attribution - NonCommercial - ShareAlike license.
 * https://creativecommons.org/licenses/by-nc-sa/3.0/
 */

 // Parameter Section //
//-------------------//

// preview[view:north, tilt:top]

// The maximum size of the longest side. The shorter side will be automatically resized in same ratio.
max_size_in_millimeter = 120; //[20:300]

// The height of the model.
model_height_in_millimeter = 5; //[0.2:0.2:100]

// Thickness of the outer outline.
outline_size_in_millimeter = 1.4; //[0.5:0.1:20]

// Thickness of the inner outline.
inline_size_in_millimeter = 0.7; //[0.5:0.1:20]

// Roundiness of the ends of the inner outlines.
inline_edge_radius_in_millimeter = 0.3; //[0.0:0.1:5]

// Flip model
flip_model = "no"; //[yes,no]

/*[hidden]*/
max_size = max_size_in_millimeter;
model_height = model_height_in_millimeter;
$fn=32;

// Outer Points
A1 = [38, 652];
A2 = [150, 342];
A3 = [372, 264];
A4 = [458, 222];
A5 = [914, 220];
A6 = [1132, 218];
A7 = [1140, 86];
A8 = [1418, 212];
A9 = [1730, 484];
A10 = [1638, 984];
A11 = [1800, 994];
A12 = [1860, 1042];
A13 = [1868, 1204];
A14 = [1816, 1070];
A15 = [1586, 1120];
A16 = [1476, 1024];
A17 = [1472, 1324];
A18 = [1414, 1316];
A19 = [1408, 1348];
A20 = [954, 1348];
A21 = [856, 1264];
A22 = [814, 1306];
A23 = [762, 1314];
A24 = [714, 1348];
A25 = [422, 1348];
A26 = [134, 790];
A27 = [164, 544];

outline = [A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27];

// Inner Points
B1 = [184, 378];
B2 = [832, 1232];
B3 = [908, 1152];
B4 = [1012, 628];
B5 = [1016, 406];
B6 = [1412, 790];
B7 = [1456, 790];
B8 = [1584, 724];
B9 = [1690, 466];
B10 = [1602, 996];

// Polygons
C1 = [A1, A2, A3, B1];
C2 = [A1, A27, B1];
C3 = [A26, A27, B1, A3, A4, A5, B3, B2, A23, A24, A25];
C4 = [A23, A22, A21, B2];
C5 = [A5, A6, A8, B5, B4, B6, A18, A19, A20, A21, B2, B3];
C6 = [B5, A8, B9, B8, B7, B6, B4];
C7 = [A6, A7, A8];
C8 = [B9, A9, A10, B10];
C9 = [B10, A10, A11, A12, A14, A15];
C10 = [A14, A12, A13];
C11 = [A17, A18, B6, B7, A16];
C12 = [B7, B8, B9, B10, A15, A16];

cut_polygons = [C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12];

min_x = A1[0];
min_y = A7[1];
max_x = A13[0];
max_y = A20[1];

x_size = max_x - min_x;
y_size = max_y - min_y;

x_factor = max_size / x_size;
y_factor = max_size / y_size;

inline_size = x_size > y_size ? inline_size_in_millimeter / x_factor / 2: inline_size_in_millimeter / y_factor / 2;
inline_edge_radius = x_size > y_size ? inline_edge_radius_in_millimeter / x_factor: inline_edge_radius_in_millimeter / y_factor;
outline_size = x_size > y_size ? outline_size_in_millimeter / x_factor - inline_size: outline_size_in_millimeter / y_factor - inline_size;

 // Program Section //
//-----------------//

if(x_size > y_size) {
    resize(newsize=[max_size, x_factor * y_size, model_height]){
        if(flip_model == "yes") {
            mirror([0,1,0]) {
                rotate([180,180,0]) {
                    create(outline, cut_polygons);
                }
            }
        } else {
            create(outline, cut_polygons);
        }
    }
} else {
    resize(newsize=[y_factor * x_size, max_size, model_height]){
        if(flip_model == "yes") {
            mirror([0,1,0]) {
                rotate([180,180,0]) {
                    create(outline, cut_polygons);
                }
            }
        } else {
            create(outline, cut_polygons);
        }
    }
}

 // Module Section //
//----------------//

module create() {
    linear_extrude(height=1) {
        difference() {
            offset(r = -0) {
                offset(r = +outline_size) {
                    polygon(points = outline, convexity = 10);
                }
            }

            for(cut_polygon = [0:len(cut_polygons)]) {
                offset(r = +inline_edge_radius) {
                    offset(r = -inline_size - inline_edge_radius) {
                        polygon(points = cut_polygons[cut_polygon], convexity = 10);
                    }
                }
            }
        }
    }
}

```


[User]
I'd like to design a customizable, telescoping staff using OpenSCAD. I have a basic idea of how I want it to work, but I need help putting it into code.

Essentially, the staff is made of repeating, twisting sections, each slightly larger than the last, creating a telescoping effect. The core shape of each section will be a triangle created by three circles intersecting each other, sort of like a trefoil knot but with each circle fully intersecting, rather than being interlaced. The difference between the circles' diameter is what creates the wall thickness. The staff should start with a base section and have several repeating sections.

Here are the parameters I'd like to control:

*   **Base Size:** The diameter of the circles creating the base triangle of the very first section, expressed in millimeters. I will be designing around my hand so that is important!
*   **Grow:** A scaling factor that determines how much larger each section's triangle will be compared to the previous section.
*   **Outside Max:** The diameter of the circles for the largest, most extended section's triangle. This acts as the final stop point for scaling.
*   **Wall Thickness:** The thickness of the walls of each section, determined by the radius difference between the inner and outer triangle circles.
*   **Twist:** The amount, in degrees, that each section rotates.
*   **Section Height:** The height of each section, expressed in millimeters.

I would also like the ability to control the fineness of the curves, and I'd like the program to output the individual section sizes as it generates them.

Could you generate the necessary OpenSCAD code for this, please? I don't have any specific libraries in mind, but please use whatever you think is appropriate. Thanks!

[Assistant]
staff.scad:
```
// Written in 2017 by Max Esser <max@ghost.coffee>

//Variables//

// preview[view:top diagonal]

/* [Global] */
/* [Staff] */
//Base Size (mm)
Base_Size = 20 ; // [10:5:100]

//Differance between shells from bottom to top
Grow = 1.3; // [1.3:0.1:2]

//Largest outside diameter (mm)
Outside_Max = 100; // [20:10:200]

//wall thickness (mm)
Wall_Thickness = 1; // [0.5,1,1.5,2]

//How many turns (°)
Twist = 180; // [0:45:720]

//Height (mm)
Section_Height_Size = 140; //[100:10:400]

/* [Hidden] */
$fn = 45;
base = (Base_Size/10)/2;
outsidemax = (Outside_Max/10)/2;
section_height = (Section_Height_Size/10);
wall = (Wall_Thickness/10);
increment = wall*5;

// Modules //
module tri(d) {
    rotate([0,0,0]) {
        translate([d/2, 0, 0]) {
            circle(d=d);
        }
    }
    rotate([0,0,120]) {
        translate([d/2, 0, 0]) {
            circle(d=d);
        }
    }
    rotate([0,0,240]) {
        translate([d/2, 0, 0]) {
            circle(d=d);
        }
    }
}

module tri2(d) {
    rotate([0,0,0]) {
        translate([d/2, 0, 0]) {
            circle(d=(d-wall));
        }
    }
    rotate([0,0,120]) {
        translate([d/2, 0, 0]) {
            circle(d=(d-wall));
        }
    }
    rotate([0,0,240]) {
        translate([d/2, 0, 0]) {
            circle(d=(d-wall));
        }
    }
    circle(d=(d-wall));
}

module section(size) {
    linear_extrude(height=section_height, center=false, convexity=10, twist=Twist, scale=Grow) {
        difference() {
        tri(size);
        tri2(size);
        }
    }
}

// Part //

linear_extrude(height=wall, center=false, convexity=10, twist=7) {
    tri(base);
}
for(a = [base : increment : outsidemax]) {
    section(a);
    echo(a);
}

//(size•scale)+wall+1
```


[User]
I'd like to create a customizable origami bull design, similar to the one described on Thingiverse. I need an OpenSCAD file that allows me to adjust several parameters.

First, the overall size should be adjustable based on the longest side, which should be set by a `max_size_in_millimeter` parameter. The other side should scale proportionally. I also need to control the model's height with a `model_height_in_millimeter` parameter.

Next, I need control over the line thicknesses. I need to set both the outer outline thickness (`outline_size_in_millimeter`) and the inner outline thickness (`inline_size_in_millimeter`). Additionally, the inner outlines should have rounded edges, controlled by `inline_edge_radius_in_millimeter`.

Finally, I need a simple toggle, a boolean variable called `flip_model`, to flip the model horizontally.

The design itself is based on a series of 2D polygon coordinates given in the existing code. It has an outer outline defined by a set of points (`A1` to `A25`) and several inner cut-out areas defined by polygons (`C1` to `C10`) which reference the A points and a couple of additional B points. I'll provide these points and polygons in the code request I'm about to paste so they can be copied directly, so you don't need to worry about parsing it from the description.  The final design should use `linear_extrude` to bring this 2D design into a 3D model of adjustable thickness.

```
 // Parameter Section //
//-------------------//

// preview[view:north, tilt:top]

// The maximum size of the longest side. The shorter side will be automatically resized in same ratio.
max_size_in_millimeter = 120; //[20:300]

// The height of the model.
model_height_in_millimeter = 5; //[0.2:0.2:100]

// Thickness of the outer outline.
outline_size_in_millimeter = 1.7; //[0.5:0.1:20]

// Thickness of the inner outline.
inline_size_in_millimeter = 0.7; //[0.5:0.1:20]

// Roundiness of the ends of the inner outlines.
inline_edge_radius_in_millimeter = 0.7; //[0.0:0.1:5]

// Flip model
flip_model = "no"; //[yes,no]

/*[hidden]*/
max_size = max_size_in_millimeter;
model_height = model_height_in_millimeter;
$fn=32;

// Outer Points
A1 = [149, 69];
A2 = [246, 127];
A3 = [240, 244];
A4 = [374, 423];
A5 = [550, 277];
A6 = [965, 335];
A7 = [1335, 161];
A8 = [1474, 117];
A9 = [1717, 384];
A10 = [1776, 606];
A11 = [1835, 709];
A12 = [2104, 696];
A13 = [1866, 825];
A14 = [1800, 783];
A15 = [1737, 736];
A16 = [1659, 991];
A17 = [1542, 1018];
A18 = [1304, 783];
A19 = [1303, 1216];
A20 = [1058, 938];
A21 = [543, 822];
A22 = [59, 1216];
A23 = [274, 518];
A24 = [196, 315];
A25 = [105, 186];

outline = [A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25];

// Inner Points
B1 = [695, 708];
B2 = [930, 753];

// Polygons
C1 = [A24, A25, A1, A2, A3];
C2 = [A24, A3, A4, A23];
C3 = [A4, A5, B1, A21, A22, A23];
C4 = [A21, A20, B2, B1];
C5 = [B1, A5, A6, B2];
C6 = [A6, A7, A18, A19, A20, B2];
C7 = [A7, A8, A9, A18];
C8 = [A9, A10, A15, A16, A17, A18];
C9 = [A10, A11, A14, A15];
C10 = [A11, A12, A13, A14];

cut_polygons = [C1, C2, C3, C4, C5, C6, C7, C8, C9, C10];
```

I think that's all the information needed.  I'm hoping the response is a complete scad file or files that I can use directly.

[Assistant]
customizable_origami_bull.scad:
```
/*
 * Customizable Origami - Bull - https://www.thingiverse.com/thing:2630699
 * by Dennis Hofmann - https://www.thingiverse.com/mightynozzle/about
 * created 2017-11-07
 * version v1.0
 *
 * Changelog
 * --------------
 * v1.0:
 *      - final design
 * --------------
 *
 * This work is licensed under the Creative Commons - Attribution - NonCommercial - ShareAlike license.
 * https://creativecommons.org/licenses/by-nc-sa/3.0/
 */

 // Parameter Section //
//-------------------//

// preview[view:north, tilt:top]

// The maximum size of the longest side. The shorter side will be automatically resized in same ratio.
max_size_in_millimeter = 120; //[20:300]

// The height of the model.
model_height_in_millimeter = 5; //[0.2:0.2:100]

// Thickness of the outer outline.
outline_size_in_millimeter = 1.7; //[0.5:0.1:20]

// Thickness of the inner outline.
inline_size_in_millimeter = 0.7; //[0.5:0.1:20]

// Roundiness of the ends of the inner outlines.
inline_edge_radius_in_millimeter = 0.7; //[0.0:0.1:5]

// Flip model
flip_model = "no"; //[yes,no]

/*[hidden]*/
max_size = max_size_in_millimeter;
model_height = model_height_in_millimeter;
$fn=32;

// Outer Points
A1 = [149, 69];
A2 = [246, 127];
A3 = [240, 244];
A4 = [374, 423];
A5 = [550, 277];
A6 = [965, 335];
A7 = [1335, 161];
A8 = [1474, 117];
A9 = [1717, 384];
A10 = [1776, 606];
A11 = [1835, 709];
A12 = [2104, 696];
A13 = [1866, 825];
A14 = [1800, 783];
A15 = [1737, 736];
A16 = [1659, 991];
A17 = [1542, 1018];
A18 = [1304, 783];
A19 = [1303, 1216];
A20 = [1058, 938];
A21 = [543, 822];
A22 = [59, 1216];
A23 = [274, 518];
A24 = [196, 315];
A25 = [105, 186];

outline = [A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25];

// Inner Points
B1 = [695, 708];
B2 = [930, 753];

// Polygons
C1 = [A24, A25, A1, A2, A3];
C2 = [A24, A3, A4, A23];
C3 = [A4, A5, B1, A21, A22, A23];
C4 = [A21, A20, B2, B1];
C5 = [B1, A5, A6, B2];
C6 = [A6, A7, A18, A19, A20, B2];
C7 = [A7, A8, A9, A18];
C8 = [A9, A10, A15, A16, A17, A18];
C9 = [A10, A11, A14, A15];
C10 = [A11, A12, A13, A14];

cut_polygons = [C1, C2, C3, C4, C5, C6, C7, C8, C9, C10];

min_x = A22[0];
min_y = A1[1];
max_x = A12[0];
max_y = A19[1];

x_size = max_x - min_x;
y_size = max_y - min_y;

x_factor = max_size / x_size;
y_factor = max_size / y_size;

inline_size = x_size > y_size ? inline_size_in_millimeter / x_factor / 2: inline_size_in_millimeter / y_factor / 2;
inline_edge_radius = x_size > y_size ? inline_edge_radius_in_millimeter / x_factor: inline_edge_radius_in_millimeter / y_factor;
outline_size = x_size > y_size ? outline_size_in_millimeter / x_factor - inline_size: outline_size_in_millimeter / y_factor - inline_size;

 // Program Section //
//-----------------//

if(x_size > y_size) {
    resize(newsize=[max_size, x_factor * y_size, model_height]){
        if(flip_model == "yes") {
            mirror([0,1,0]) {
                rotate([180,180,0]) {
                    create(outline, cut_polygons);
                }
            }
        } else {
            create(outline, cut_polygons);
        }
    }
} else {
    resize(newsize=[y_factor * x_size, max_size, model_height]){
        if(flip_model == "yes") {
            mirror([0,1,0]) {
                rotate([180,180,0]) {
                    create(outline, cut_polygons);
                }
            }
        } else {
            create(outline, cut_polygons);
        }
    }
}

 // Module Section //
//----------------//

module create() {
    linear_extrude(height=1) {
        difference() {
            offset(r = -0) {
                offset(r = +outline_size) {
                    polygon(points = outline, convexity = 10);
                }
            }

            for(cut_polygon = [0:len(cut_polygons)]) {
                offset(r = +inline_edge_radius) {
                    offset(r = -inline_size - inline_edge_radius) {
                        polygon(points = cut_polygons[cut_polygon], convexity = 10);
                    }
                }
            }
        }
    }
}

```


[User]
I need a parametric fan shroud designed in OpenSCAD. The shroud should fit onto a standard square fan, and be customizable for different fan sizes, hole patterns, and shroud shapes. I've attached a design in a .scad file for reference. Here are the key features and parameters I'd like to control:

**Fan Dimensions:**

*   `fan_size`: The size of the square fan (e.g., 80mm).
*   `hole_size`: The diameter of the screw holes for mounting the fan.
*   `hole_spacing`: The spacing between the centers of adjacent screw holes.

**Shroud Dimensions:**

*   `shroud_height`: The overall height of the shroud.
*   `shroud_angle`: The angle of the shroud's cut-off at the top.
*   `shroud_offset`: How far the shroud is offset from the front edge of the base.
*   `enable_brace`: A boolean toggle for a brace under the dome (yes/no).
*   `shroud_thickness`: The thickness of the shroud walls.

**Other Requirements:**

*   The shroud should have a base that fits flush on the fan.
*   There should be fillets at the corners where the shroud meets the base for strength and smoother printing.
*   The design should be fully parametric so that all dimensions can be adjusted.
*   I'd like to be able to switch between a preview and render mode. The preview mode should be faster but can sacrifice some detail, like a lower `quality` setting for the curved surfaces.
*  I'd like to be able to control the `quality` of the curved surfaces.

I'm not using any libraries at the moment.  Could you generate the OpenSCAD code to achieve this?

[Assistant]
FAN_SHROUD.scad:
```
// Switch between render mode and preview.
view_mode = "Preview"; // [Preview,Render]
// Quality of curved surfaces.
quality = 70; // [10:10:200]

/* [Fan Dimensions] */

// The size of the fan to fit on.
fan_size = 80;
// Diameter of the screw holes.
hole_size = 4.5; // [1:0.1:10]
// Spacing between the center of each hole in an adjacent pair.
hole_spacing = 71.5;

/* [Shroud Dimensions] */

// Height of the shroud.
shroud_height = 40;
// Angle of the shroud cutoff.
shroud_angle = 22.5; // [0:0.5:45]
// Shroud offset from the front edge of the base.
shroud_offset = 10;
// Enable or disable the brace under the dome.
enable_brace = "Yes"; // [Yes,No]
// Wall thickness.
shroud_thickness = 3; // [1:0.5:5]

/* [Hidden] */

$fn = quality;

// Turn Yes and No into booleans.
shroud_brace = enable_brace == "Yes" ? true : false;

// Make four cylinders.
module cylinders(xyz, r, center=false) {
    translate(center ? -[xyz[0] / 2, xyz[1] / 2, xyz[2] / 2] : []) union() {
        translate([r,          r,          0]) cylinder(h=xyz[2], r=r);
        translate([r,          xyz[1] - r, 0]) cylinder(h=xyz[2], r=r);
        translate([xyz[0] - r, r,          0]) cylinder(h=xyz[2], r=r);
        translate([xyz[0] - r, xyz[1] - r, 0]) cylinder(h=xyz[2], r=r);
    }
}

// Make a cube with four rounded sides.
module roundcube(xyz, r, center=false) {
    hull() cylinders(xyz, r, center);
}

// Make the shroud, cylinder + sphere.
module shroud(size, center=false) {
    sphere(d=size, center=true);
    cylinder(d=size, h=size / 2);
}

// Full shroud with base, holes, and fillets.
module print_shroud() {
    difference() {
        // Full shroud with base.
        union() {
            // Angle cut shroud shell.
            translate([fan_size / 2 - shroud_offset, 0, 0]) difference() {
                // Completed shroud shell with the brace.
                translate([shroud_offset - fan_size / 2, 0, 0]) rotate([0, 90]) union() {
                    // Shroud shell.
                    difference() {
                        // Larger exterior shape.
                        resize([shroud_height * 2, fan_size, fan_size]) shroud(fan_size, center=true);

                        // Smaller, scaled down, shape.
                        resize([shroud_height * 2 - shroud_thickness * 2, fan_size - shroud_thickness * 2, fan_size - shroud_thickness * 2])
                            shroud(fan_size - shroud_thickness * 2, center=true);
                    }

                    // Cylinder and cube to make the middle brace.
                    resize([shroud_height * 2 - shroud_thickness, shroud_thickness, fan_size - shroud_thickness])
                    if (shroud_brace) rotate([90]) {
                        cylinder(d=fan_size, h=shroud_thickness, center=true);
                        translate([0, fan_size / 4, 0]) cube([fan_size, fan_size / 2, shroud_thickness], center=true);
                    }
                }
                // Trim off bottom.
                translate([shroud_offset - fan_size / 2, 0, -shroud_height * 2 / 4 - shroud_thickness])
                    cube(size=[fan_size + 2,  fan_size + 2, shroud_height * 2 / 2], center=true);

                // Offset block.
                translate([fan_size / 2, 0, fan_size / 4]) cube([fan_size, fan_size, fan_size / 2], center=true);

                // Angle block.
                rotate([0, -shroud_angle]) translate([fan_size / 2, 0, shroud_height * 2 / 2])
                    cube([fan_size, fan_size, shroud_height * 2], center=true);
            }

            // Full base with hole. Must be done twice because of the preview clipping issues.
            translate([0, 0, -shroud_thickness / 2]) difference() {
                cube([fan_size, fan_size, shroud_thickness], center=true);
                cylinder(d=fan_size - shroud_thickness * 2, h=shroud_thickness + 2, center=true);
            }
        }

        // Clean off the bottom of the sphere inside the hole.
        translate([0, 0, -shroud_thickness / 2 - 1]) difference() {
            cylinder(d=fan_size - shroud_thickness * 2, h=shroud_thickness + 2, center=true);
            cube([fan_size, shroud_thickness, shroud_thickness + 2], center=true);
        }

        // Cylinders for holes.
        translate([0, 0, shroud_height * 2 / 2 - shroud_thickness])
            cylinders([hole_spacing + hole_size, hole_spacing + hole_size, shroud_height * 2 + 2], r=hole_size / 2, center=true);

        // Fillet box.
        translate([0, 0, shroud_height * 2 / 2 - shroud_thickness]) difference() {
            cube([fan_size + 2, fan_size + 2, shroud_height * 2 + 2], center=true);
            roundcube([fan_size, fan_size, shroud_height * 2 + 2], (fan_size - hole_spacing) / 2, center=true);
        }
    }
}

// If preview is off, render the whole thing.
if (view_mode == "Render") render() print_shroud(); else print_shroud();

```


[User]
I'm looking to create a customizable origami bear design in OpenSCAD, similar to the one I saw on Thingiverse. I'd like it to be parametric so I can adjust the size, thickness, and other features.

Here's what I'm thinking:

*   **Overall Shape:** The design is a 2D outline of a bear, based on a series of outer points and inner cut polygons. I've got the coordinates for those points already.
*   **Customizable Size:** I'd like to be able to set a maximum size for the longest side of the bear, and the other side should scale proportionally. I also need to be able to control the overall model height.
*   **Outline Thickness:** I need to be able to specify both the thickness of the outer outline and the inner outlines separately.
*   **Inner Outline Edges:** I want the ends of the inner outlines to have a rounded shape, and the radius of that rounding should be configurable.
*   **Flipping:** It'd be great to have an option to flip the model horizontally.

I plan on using this for laser cutting or 3D printing, so I need it to generate clean, closed paths. I'm not sure how to implement the rounded edges, or to make sure that the inner outlines correctly subtract from the outer. It would be fantastic if the code could handle the scaling and flipping as well.

I need you to generate a single .scad file that includes all the point data (as variables) and all of the modules necessary to create the model. Could you handle that? I don't need any external libraries.

[Assistant]
customizable_origami_bear.scad:
```
/*
 * Customizable Origami - Bear - https://www.thingiverse.com/thing:2632984
 * by Dennis Hofmann - https://www.thingiverse.com/mightynozzle/about
 * created 2017-11-10
 * version v1.1
 *
 * Changelog
 * --------------
 * v1.1:
 *      - set feet to the same origin
 *
 * v1.0:
 *      - final design
 * --------------
 *
 * This work is licensed under the Creative Commons - Attribution - NonCommercial - ShareAlike license.
 * https://creativecommons.org/licenses/by-nc-sa/3.0/
 */

 // Parameter Section //
//-------------------//

// preview[view:north, tilt:top]

// The maximum size of the longest side. The shorter side will be automatically resized in same ratio.
max_size_in_millimeter = 120; //[20:300]

// The height of the model.
model_height_in_millimeter = 5; //[0.2:0.2:100]

// Thickness of the outer outline.
outline_size_in_millimeter = 1.7; //[0.5:0.1:20]

// Thickness of the inner outline.
inline_size_in_millimeter = 0.7; //[0.5:0.1:20]

// Roundiness of the ends of the inner outlines.
inline_edge_radius_in_millimeter = 0.7; //[0.0:0.1:5]

// Flip model
flip_model = "no"; //[yes,no]

/*[hidden]*/
max_size = max_size_in_millimeter;
model_height = model_height_in_millimeter;
$fn=32;

// Outer Points
A1 = [281, 1136];
A2 = [130, 1136];
A3 = [30, 1007];
A4 = [167, 758];
A5 = [269, 340];
A6 = [655, 82];
A7 = [1192, 106];
A8 = [1329, 90];
A9 = [1688, 226];
A10 = [1769, 243];
A11 = [1795, 160];
A12 = [1893, 161];
A13 = [1878, 262];
A14 = [1956, 398];
A15 = [1938, 430];
A16 = [2088, 531];
A17 = [2021, 607];
A18 = [1850, 564];
A19 = [1837, 583];
A20 = [1502, 520];
A21 = [1426, 713];
A22 = [1591, 905];
A23 = [1579, 1048];
A24 = [1515, 1101];
A25 = [1463, 954];
A26 = [1346, 907];
A27 = [1305, 886];
A28 = [1336, 1069];
A29 = [1439, 1136];
A30 = [1268, 1136];
A31 = [1164, 963];
A32 = [1160, 777];
A33 = [1159, 665];
A34 = [768, 787];
A35 = [795, 1032];
A36 = [948, 1136];
A37 = [654, 1136];
A38 = [415, 790];
A39 = [175, 1024];
A40 = [181, 1075];

outline = [A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, /*A23,*/ A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40];

// Inner Points
B1 = [387, 753];
B2 = [254, 555];

// Polygons
C1 = [A1, A2, A40];
C2 = [A40, A39, A3, A2];
C3 = [A3, A39, A38, B1, A4];
C4 = [A4, B1, B2, A5];
C5 = [A5, A6, A34, A35, A37, A38, B1, B2];
C6 = [A6, A7, A33, A34];
C7 = [A35, A36, A37];
C8 = [A7, A8, A20, A21, A26, A27, A32, A33];
C9 = [A32, A31, A30, A28, A27];
C10 = [A28, A30, A29];
C11 = [A24, /*A23,*/ A22, A25];
C12 = [A22, A21, A26, A25];
C13 = [A20, A9, A8];
C14 = [A20, A19, A18, A15, A14, A13, A10, A9];
C15 = [A10, A11, A12, A13];
C16 = [A15, A16, A17, A18];

cut_polygons = [C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16];

min_x = A3[0];
min_y = A8[1];
max_x = A16[0];
max_y = A1[1];

x_size = max_x - min_x;
y_size = max_y - min_y;

x_factor = max_size / x_size;
y_factor = max_size / y_size;

inline_size = x_size > y_size ? inline_size_in_millimeter / x_factor / 2: inline_size_in_millimeter / y_factor / 2;
inline_edge_radius = x_size > y_size ? inline_edge_radius_in_millimeter / x_factor: inline_edge_radius_in_millimeter / y_factor;
outline_size = x_size > y_size ? outline_size_in_millimeter / x_factor - inline_size: outline_size_in_millimeter / y_factor - inline_size;

 // Program Section //
//-----------------//

if(x_size > y_size) {
    resize(newsize=[max_size, x_factor * y_size, model_height]){
        if(flip_model == "yes") {
            mirror([0,1,0]) {
                rotate([180,180,0]) {
                    create(outline, cut_polygons);
                }
            }
        } else {
            create(outline, cut_polygons);
        }
    }
} else {
    resize(newsize=[y_factor * x_size, max_size, model_height]){
        if(flip_model == "yes") {
            mirror([0,1,0]) {
                rotate([180,180,0]) {
                    create(outline, cut_polygons);
                }
            }
        } else {
            create(outline, cut_polygons);
        }
    }
}

 // Module Section //
//----------------//

module create() {
    linear_extrude(height=1) {
        difference() {
            offset(r = -0) {
                offset(r = +outline_size) {
                    polygon(points = outline, convexity = 10);
                }
            }

            for(cut_polygon = [0:len(cut_polygons)]) {
                offset(r = +inline_edge_radius) {
                    offset(r = -inline_size - inline_edge_radius) {
                        polygon(points = cut_polygons[cut_polygon], convexity = 10);
                    }
                }
            }
        }
    }
}

```


[User]
I'd like to create a customizable 2D origami design of a robin redbreast, similar to the one I saw on Thingiverse. The design should be parametric, so I can easily adjust the overall size, height, and outline thicknesses.

Here are the specific parameters I'd like to control:

*   **`max_size_in_millimeter`**: This will be the maximum length of either side of the model, ensuring the aspect ratio is preserved. I want to be able to set it within a reasonable range, say from 20mm to 300mm.
*   **`model_height_in_millimeter`**: This parameter will define the thickness of the 2D shape, and should have a range of 0.2mm to 100mm, adjustable in 0.2mm increments.
*   **`outline_size_in_millimeter`**: This controls the thickness of the outer outline of the robin, adjustable from 0.5mm to 20mm in 0.1mm steps.
*   **`inline_size_in_millimeter`**: This sets the thickness of the inner cut outlines, with the same range and step of 0.5mm to 20mm and 0.1mm increments as the outer outline.
*   **`inline_edge_radius_in_millimeter`**: This parameter will control the roundness of the ends of the inner cut outlines, ranging from 0mm to 5mm with 0.1mm step.
*  **`flip_model`**: An option to flip the model horizontally, with a choice between "yes" or "no".

I want the design to be based on the provided coordinates for the outer outline and inner cuts. I'm including those point definitions as well as polygon definitions here. These should be scaled based on the `max_size_in_millimeter` parameter.

```
// Outer Points
A1 = [1, 2300];
A2 = [37, 2220];
A3 = [669, 1687];
A4 = [654, 1670];
A5 = [557, 1680];
A6 = [1653, 614];
A7 = [2154, 84];
A8 = [2439, 84];
A9 = [2689, 289];
A10 = [2717, 306];
A11 = [2959, 430];
A12 = [2657, 539];
A13 = [2596, 963];
A14 = [2410, 1674];
A15 = [2187, 1979];
A16 = [1597, 1956];
A17 = [1434, 2019];
A18 = [1583, 2403];
A19 = [1364, 2039];
A20 = [1404, 1950];
A21 = [1323, 1946];
A22 = [1051, 2051];
A23 = [1283, 2629];
A24 = [957, 2084];
A25 = [1019, 1939];
A26 = [876, 1926];
A27 = [713, 1729];
A28 = [40, 2626];
A29 = [69, 2490];
A30 = [0, 2579];
A31 = [120, 2203];

outline = [A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31];

// Inner Points
B1 = [687, 1709];
B2 = [2280, 1143];
B3 = [2087, 709];
B4 = [2519, 241];
B5 = [2563, 394];
B6 = [2100, 1471];

// Polygons
C1 = [A5, A6, B3];
C2 = [A5, B3, B2];
C3 = [B2, B6, A4, A5];
C4 = [A6, A7, A8, A9, B4, B3];
C5 = [B4, A9, A10, B5, A12, A13, B2, B3];
C6 = [A10, A11, A12, B5];
C7 = [A13, A14, A15, B6, B2];
C8 = [B6, A15, A16, A20, A21, A25, A26, A27, B1, A3, A4];
C9 = [A20, A16, A17, A19];
C10 = [A17, A18, A19];
C11 = [A21, A25, A24, A22];
C12 = [A22, A23, A24];
C13 = [A3, A2, A1, A31, B1];
C14 = [B1, A31, A30, A29];
C15 = [B1, A27, A28, A29];

cut_polygons = [C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15];
```

The script should calculate scaling factors based on the provided point coordinates and then generate a 2D model using `linear_extrude` with the specified `model_height`. The outer outline should be created with an offset to achieve the desired thickness. Similarly, inner cut outlines should have an offset to achieve the correct thickness and edge radius. The design should be centered, and the flip option should work as expected.

I'm expecting a single .scad file. I do not expect it to include any libraries.

[Assistant]
customizable_origami_robin_redbreast.scad:
```
/*
 * Customizable Origami - Robin Redbreast - https://www.thingiverse.com/thing:2634050
 * by Dennis Hofmann - https://www.thingiverse.com/mightynozzle/about
 * created 2017-11-08
 * version v1.0
 *
 * Changelog
 * --------------
 * v1.0:
 *      - final design
 * --------------
 *
 * This work is licensed under the Creative Commons - Attribution - NonCommercial - ShareAlike license.
 * https://creativecommons.org/licenses/by-nc-sa/3.0/
 */

 // Parameter Section //
//-------------------//

// preview[view:north, tilt:top]

// The maximum size of the longest side. The shorter side will be automatically resized in same ratio.
max_size_in_millimeter = 120; //[20:300]

// The height of the model.
model_height_in_millimeter = 5; //[0.2:0.2:100]

// Thickness of the outer outline.
outline_size_in_millimeter = 1.4; //[0.5:0.1:20]

// Thickness of the inner outline.
inline_size_in_millimeter = 0.7; //[0.5:0.1:20]

// Roundiness of the ends of the inner outlines.
inline_edge_radius_in_millimeter = 0.1; //[0.0:0.1:5]

// Flip model
flip_model = "no"; //[yes,no]

/*[hidden]*/
max_size = max_size_in_millimeter;
model_height = model_height_in_millimeter;
$fn=32;

// Outer Points
A1 = [1, 2300];
A2 = [37, 2220];
A3 = [669, 1687];
A4 = [654, 1670];
A5 = [557, 1680];
A6 = [1653, 614];
A7 = [2154, 84];
A8 = [2439, 84];
A9 = [2689, 289];
A10 = [2717, 306];
A11 = [2959, 430];
A12 = [2657, 539];
A13 = [2596, 963];
A14 = [2410, 1674];
A15 = [2187, 1979];
A16 = [1597, 1956];
A17 = [1434, 2019];
A18 = [1583, 2403];
A19 = [1364, 2039];
A20 = [1404, 1950];
A21 = [1323, 1946];
A22 = [1051, 2051];
A23 = [1283, 2629];
A24 = [957, 2084];
A25 = [1019, 1939];
A26 = [876, 1926];
A27 = [713, 1729];
A28 = [40, 2626];
A29 = [69, 2490];
A30 = [0, 2579];
A31 = [120, 2203];

outline = [A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31];

// Inner Points
B1 = [687, 1709];
B2 = [2280, 1143];
B3 = [2087, 709];
B4 = [2519, 241];
B5 = [2563, 394];
B6 = [2100, 1471];

// Polygons
C1 = [A5, A6, B3];
C2 = [A5, B3, B2];
C3 = [B2, B6, A4, A5];
C4 = [A6, A7, A8, A9, B4, B3];
C5 = [B4, A9, A10, B5, A12, A13, B2, B3];
C6 = [A10, A11, A12, B5];
C7 = [A13, A14, A15, B6, B2];
C8 = [B6, A15, A16, A20, A21, A25, A26, A27, B1, A3, A4];
C9 = [A20, A16, A17, A19];
C10 = [A17, A18, A19];
C11 = [A21, A25, A24, A22];
C12 = [A22, A23, A24];
C13 = [A3, A2, A1, A31, B1];
C14 = [B1, A31, A30, A29];
C15 = [B1, A27, A28, A29];

cut_polygons = [C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15];

min_x = A30[0];
min_y = A7[1];
max_x = A11[0];
max_y = A23[1];

x_size = max_x - min_x;
y_size = max_y - min_y;

x_factor = max_size / x_size;
y_factor = max_size / y_size;

inline_size = x_size > y_size ? inline_size_in_millimeter / x_factor / 2: inline_size_in_millimeter / y_factor / 2;
inline_edge_radius = x_size > y_size ? inline_edge_radius_in_millimeter / x_factor: inline_edge_radius_in_millimeter / y_factor;
outline_size = x_size > y_size ? outline_size_in_millimeter / x_factor - inline_size: outline_size_in_millimeter / y_factor - inline_size;

 // Program Section //
//-----------------//

if(x_size > y_size) {
    resize(newsize=[max_size, x_factor * y_size, model_height]){
        if(flip_model == "yes") {
            mirror([0,1,0]) {
                rotate([180,180,0]) {
                    create(outline, cut_polygons);
                }
            }
        } else {
            create(outline, cut_polygons);
        }
    }
} else {
    resize(newsize=[y_factor * x_size, max_size, model_height]){
        if(flip_model == "yes") {
            mirror([0,1,0]) {
                rotate([180,180,0]) {
                    create(outline, cut_polygons);
                }
            }
        } else {
            create(outline, cut_polygons);
        }
    }
}

 // Module Section //
//----------------//

module create() {
    linear_extrude(height=1) {
        difference() {
            offset(r = -0) {
                offset(r = +outline_size) {
                    polygon(points = outline, convexity = 10);
                }
            }

            for(cut_polygon = [0:len(cut_polygons)]) {
                offset(r = +inline_edge_radius) {
                    offset(r = -inline_size - inline_edge_radius) {
                        polygon(points = cut_polygons[cut_polygon], convexity = 10);
                    }
                }
            }
        }
    }
}

```


[User]
Hi there, I'm looking to create a customizable lamp shade and base for an E27 bulb socket. I'd like the design to be parametric, so I can adjust things like the diameters, heights, and wall thickness.

Here are the main things I need:

*   **Two main parts:** A base that fits around the E27 socket and a shade that sits on top. I'd like an option to export them separately or together.
*   **Base Dimensions:**
    *   I need a parameter for the base diameter (the part that goes around the socket). Let's start with a default of 88mm, adjustable from 50 to 100mm.
    *   The base needs a parameter for overall height, with a default of 50mm and range of 30 to 100mm.
     *   It should have a parameter for wall thickness for the base (default 2mm, range 2 to 3mm).
     *   I'd like a parameter for the thickness of the base cap where the socket sits (default 15mm, range 10 to 20mm).
     *   The cap should have a rim that is controlled by a parameter (default 4mm, range 1 to 6mm).
*   **Shade Dimensions:**
    *   I need a parameter for the shade's bottom diameter (where it meets the base), with a default of 108mm and adjustable from 55 to 150mm.
    *   There should be a parameter for the shade's overall height (including the part that sits on the base), with a default of 150mm and range of 60 to 200mm.
*   **Grill Details**
    *   The base should have a grill for ventilation.  I'd like a parameter to control the height of the grill relative to the base height (a factor, starting at 0.55 and adjustable between 0.4 and 0.7, with increments of 0.05)
    *   A parameter to specify the number of holes (default 20, range 10 to 30)
    *   And a parameter for the grill size (diameter of the cylinder used to make the hole - default 2.5mm with a range from 1 to 4mm and increments of 0.5)

*   **Cylinder Resolution:** I need a parameter to control the smoothness of the cylinders (number of sides). The default should be 60 and range from 30 to 100.

*   **Output Option:** An option to output just the base, just the shade, or both together.

I'd like the whole thing designed in OpenSCAD. I don't need any external libraries for this, I think.

[Assistant]
socket_shade_customizer.scad:
```
//!OpenSCAD

part = "base";//[base,shade,both]
//socket lamp base diameter
base_diameter= 88;//[50:100]
//shade bottom diameter
shade_diameter=108;//[55:150]
//shade overall height
overall_height = 150;//[60:200]
//base height
base_height = 50;//[30:100]
//base wall thickness,mm
thick = 2;//[2:3]
//receptacle base cap thickness
base_thick = 15;//[10:20]
//receptacle base cap rim width
base_rim = 4;//[1:6]
//grill to base height ratio
factor = 0.55;//[0.4:0.05:0.7]
//number of holes for grill
holes = 20;//[10:30]
//grill size
grill_size = 2.5;//[1:0.5:4]
//cylinder resolution or number of sides
sides = 60;//[30:100]

base_radius = base_diameter / 2;
shade_radius = shade_diameter / 2;
shade_height = overall_height - base_height;

if (part == "base") {
  base();
} else if (part == "shade") {
  shade();
} else {
  union(){
    base();
    shade();
  }
}

module shade() {
  color([1,1,1]) {
    {
      $fn=sides;    //set sides to sides
      difference() {
        cylinder(r1=(shade_radius + thick), r2=(base_radius + thick), h=overall_height, center=false);

        translate([0, 0, shade_height]){
          cylinder(r1=(shade_radius + thick), r2=(shade_radius + thick), h=base_height+1, center=false);
        }
      }
    }
  }
}

module base() {
  color([0,0,1]) {
    {
      $fn=sides;    //set sides to sides
      difference() {
        union(){
          difference() {
            cylinder(r1=(shade_radius + thick), r2=(base_radius + thick), h=overall_height, center=false);

            cylinder(r1=(shade_radius + thick), r2=(shade_radius + thick), h=shade_height, center=false);
          }

            cylinder(r1=(shade_radius + (thick - 0.5)), r2=(base_radius + (thick - 0.5)), h=overall_height, center=false);

        }

        translate([0, 0, (thick * -1)]){
          cylinder(r1=shade_radius, r2=base_radius, h=overall_height, center=false);
          cylinder(r1=(shade_radius + thick), r2=(shade_radius + thick), h=(shade_height+thick - 3), center=false);
        }
        cylinder(r1=(base_radius - base_rim), r2=(base_radius - base_rim), h=overall_height+1, center=false);
        translate([0, 0, (overall_height - thick)]){
          intersection() {
            cube([base_thick, (base_radius * 2), 10], center=true);

            cylinder(r1=base_radius, r2=base_radius, h=10, center=false);

          }
        }
        for (i = [0 : abs(360 / holes) : 360]) {
          rotate([0, 0, i]){
            translate([0, 0, (shade_height + base_height * (factor + (1 - factor) / 2))]){
              rotate([0, 90, 0]){
                hull(){
                  cylinder(r1=grill_size, r2=grill_size, h=(shade_radius + thick), center=false);
                  translate([(base_height * factor), 0, 0]){
                    cylinder(r1=grill_size, r2=grill_size, h=(shade_radius + thick), center=false);
                  }
                }
              }
            }
          }
        }

      }
    }
  }
}

```


[User]
Okay, I'm looking to design a heart-shaped puzzle using Tetris-like pieces, but I want each piece to be more than just a simple shape – I want them to be little buildings, generated algorithmically. I really like the style of those "Futuristic Cities" and "Sci-fi Cities" projects you might be familiar with, where the buildings are recursive and kind of crazy looking.

Here's what I'm thinking for the overall design:

**Puzzle Shape:**

*   The puzzle itself should form a heart shape. I'm not too worried about how this is achieved initially, I just need to generate the pieces as described below.

**Pieces:**

*   I'll need 24 total pieces.
*   The pieces should correspond to the classic Tetris shapes (O, I, S, Z, L, J, T), plus single, double, triple, and corner shapes. So, all the basic tetrominoes plus one, two and three block pieces as well as a corner piece. I want a complete set, so one of each shape.
*   Each piece should be like a miniature, randomly generated building, not just a solid block. This is the most important aspect of the design.
*   I'd like to be able to set a base tile size in millimeters (e.g., 20mm), and all the pieces should be built as multiples of this grid size. I'd like there to be a variable for the base height of all the pieces too.
*   I’d like the buildings on each piece to be generated using a recursive algorithm similar to what I saw in those city projects, incorporating cubes, cylinders, pyramids, and other simple geometric shapes. I'm not worried about being able to generate the exact same outputs as those examples, just something in that style with a decent amount of randomness so that every piece looks different.
*   The building structures on each piece should be built up on top of the base piece in levels (so, each level has a height). This height should also be configurable via variable, so I can test different looks.
*   I'd like a seed to be used for the random generation so I can reproduce specific layouts if needed, and also be able to generate new ones easily.

**OpenSCAD Requirements:**

*   I'd like the code to be parametric. I want to be able to change the tile size, the base height, the level height, the seed, and the recursive algorithm's parameters (if there are any exposed) through variables at the top of the file.
*   I would prefer if each piece's generation is modularized. That is, it's easy to call a function that generates a single piece for a given shape, at a given size, with a specific seed. It should not be necessary to select between different pieces using an if statement.
*   I don't really have any libraries in mind, but please use any that you think would be helpful.
*   I need the pieces to be separate STL files, so I would likely need to generate them within a loop somehow.

Basically, I need the script to generate 24 unique, crazy building blocks which can then be used to form a heart shape. I would also need an STL for a frame around it, but I don't need the code for generating the frame. I just need the pieces.

Can you help me with that?

[Assistant]
tetris_cities.scad:
```
// RECURSION 3D. Version 1.0

// Por: Fernando Jerez Garrido

// License Creative Commons CC

/*******************************

    CUSTOMIZATION

********************************/

// Pieces: O I S Z L J T Single/double/triple/corner
part = "I"; // [O:O-piece, I:I-piece, S:S-piece, Z:Z-piece, L:L-piece, J:J-piece, T:T-piece , single: Single, double: Double, triple:Triple, corner:Corner]

// Base height.
base_height = 3;

// Grid size
grid = 20;

/*******************************
   GLOBAL PARAMETERS
********************************/
/* [Hidden] */

// Random seed (for testing on openSCAD)
 seed=round(rands(1,1000000,1)[0]); // random seed
 echo (str("Seed: ",seed));

// Seed (engraved at the bottom of figure)
//seed= 883488; //220505  494781 530840 471624(piramide) 122706(torre)

tolerance = 0.1; // like the 'Horizontal expansion' in Cura Slicer
t2=tolerance*2;

$fn=40; // Number of faces for cylinders
min_size = 3; // stops recursion at this size
level_height = 1; // height of 'levels'. works good with 1, higher heights make weird things

randoms = rands(0,1000,3000,seed); // random sequence

/* BEGIN */

if(part == "single"){
    size_x = grid-t2;
    size_y = grid-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube
}else
if(part == "double"){
    size_x = 2*grid-t2;
    size_y = grid-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube
}else
if(part == "triple"){
    size_x = 3*grid-t2;
    size_y = grid-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube
}else
if(part == "corner"){
    size_x = grid*2-t2;
    size_y = grid-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube

    translate([-grid*0.5,grid-tolerance,0]){
        cube([grid-t2,grid,base_height],center=true);
        translate([0,0,base_height*0.5])
        cube_rec([grid-t2,grid,level_height],1235); // Cube
    }
}else
if(part == "O"){
    size_x = grid*2-t2;
    size_y = grid*2-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube
}else
if(part == "I"){
    size_x = grid*4-t2;
    size_y = grid-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube
}else
if(part == "Z"){
    size_x = grid*2-t2;
    size_y = grid-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube

    translate([grid*0.5,grid-tolerance,0]){
        cube([grid-t2,grid,base_height],center=true);
        translate([0,0,base_height*0.5])
        cube_rec([grid-t2,grid,level_height],9876); // Cube
    }
    translate([-grid*0.5,-(grid-tolerance),0]){
        cube([grid-t2,grid,base_height],center=true);
        translate([0,0,base_height*0.5])
        cube_rec([grid-t2,grid,level_height],1234); // Cube
    }
}else
if(part == "S"){
    size_x = grid*2-t2;
    size_y = grid-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube

    translate([-grid*0.5,grid-tolerance,0]){
        cube([grid-t2,grid,base_height],center=true);
        translate([0,0,base_height*0.5])
        cube_rec([grid-t2,grid,level_height],9876); // Cube
    }
    translate([grid*0.5,-(grid-tolerance),0]){
        cube([grid-t2,grid,base_height],center=true);
        translate([0,0,base_height*0.5])
        cube_rec([grid-t2,grid,level_height],876); // Cube
    }
}else
if(part == "J"){
    size_x = grid*3-t2;
    size_y = grid-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube

    translate([-grid,grid-tolerance,0]){
        cube([grid-t2,grid,base_height],center=true);
        translate([0,0,base_height*0.5])
        cube_rec([grid-t2,grid,level_height],1235); // Cube
    }
}else
if(part == "L"){
    size_x = grid*3-t2;
    size_y = grid-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube

    translate([grid,grid-tolerance,0]){
        cube([grid-t2,grid,base_height],center=true);
        translate([0,0,base_height*0.5])
        cube_rec([grid-t2,grid,level_height],3345); // Cube
    }

}else
if(part == "T"){
    size_x = grid*3-t2;
    size_y = grid-t2;
    cube([size_x,size_y,base_height],center=true);
    translate([0,0,base_height*0.5])
    cube_rec([size_x,size_y,level_height],0); // Cube

    translate([0,grid-tolerance,0]){
        cube([grid-t2,grid,base_height],center=true);
        translate([0,0,base_height*0.5])
        cube_rec([grid-t2,grid,level_height],9876); // Cube
    }

}

// Returns the n-th number modularized into range[a,b]
function random(a,b,n)= a+( ceil(randoms[n%3000]) % (1+b-a) );

/*****************************
    MODULES
******************************/

module cube_rec(size,rn){
    sx = size[0];
    sy = size[1];
    sz = size[2];

    diameter = min(sx,sy);
    radius = diameter/2;

    r=1;

    cube(size,center=true);

    if(sx>=min_size && sy>=min_size){
        opcion = random(1,7,rn);

        if(opcion==1){
            // Reduce
            translate([0,0,sz]){
                cube_rec([sx-1,sy-1,sz],rn+1);
            }
        }else if(opcion==2){
            // Divide en X
            translate([0,0,sz]){
                translate([sx/4,0,0])
                    cube_rec([sx/2-r,sy-r,sz],rn+11);
                translate([-sx/4,0,0])
                    cube_rec([sx/2-r,sy-r,sz],rn+97);
            }
        }else if(opcion==3){
            // Divide en Y
            translate([0,0,sz]){
                translate([0,sy/4,0])
                    cube_rec([sx-r,sy/2-r,sz],rn+31);
                translate([0,-sy/4,0])
                    cube_rec([sx-r,sy/2-r,sz],rn+51);
            }
        }else if(opcion==4){
            // Piramide
            diameter = min(sx,sy);
            radius = diameter/2;
            t1=0.2;
            translate([0,0,0]){

                // 4 piramides laterales
                translate([radius*0.7,radius*0.7,0])
                  rotate([0,0,45])
                    cylinder(r1 = diameter*t1,r2 = diameter*t1*0.5,h=diameter*0.3,$fn=4);
                translate([-radius*0.7,radius*0.7,0])
                  rotate([0,0,45])
                    cylinder(r1 = diameter*t1,r2 = diameter*t1*0.5,h=diameter*0.3,$fn=4);
                translate([radius*0.7,-radius*0.7,0])
                  rotate([0,0,45])
                    cylinder(r1 = diameter*t1,r2 = diameter*t1*0.5,h=diameter*0.3,$fn=4);
                translate([-radius*0.7,-radius*0.7,0])
                  rotate([0,0,45])
                    cylinder(r1 = diameter*t1,r2 = diameter*t1*0.5,h=diameter*0.3,$fn=4);
                // Centro
                rotate([0,0,45]){
                   cylinder(r1 = radius*0.9,r2 = radius*0.9,h=diameter*0.3,$fn=4);
                   translate([0,0,diameter*0.2])
                   cylinder(r1 = radius*0.9,r2 = radius*1.13,h=diameter*0.1,$fn=4);

                }
                // Cubo_rec
                translate([0,0,diameter*0.3+0.5])
                  cube_rec([diameter*0.8,diameter*0.8,sz],rn+1);

                // rellena laterales
                translate([radius*0.8,0,0])
                  cube_rec([diameter*0.2,diameter*0.4,sz],rn+23);
                translate([-radius*0.8,0,0])
                  cube_rec([diameter*0.2,diameter*0.4,sz],rn+57);
                translate([0,radius*0.8,0])
                  cube_rec([diameter*0.4,diameter*0.2,sz],rn+73);
                translate([0,-radius*0.8,0])
                  cube_rec([diameter*0.4,diameter*0.2,sz],rn+11);

                //Lateral cubes
                if(sx>sy){
                    space = sx-sy;
                    translate([radius+space/4,0,0])
                        cube_rec([space/2-r,sy-r,sz],rn+61);
                    translate([-(radius+space/4),0,0])
                        cube_rec([space/2-r,sy-r,sz],rn+73);
                }else{
                    space = sy-sx;
                    translate([0,radius+space/4,0])
                        cube_rec([sx-r,space/2-r,sz],rn+51);
                    translate([0,-(radius+space/4),0])
                        cube_rec([sx-r,space/2-r,sz],rn+97);
                }

            }

        }else if(opcion==5){
            // Piramide 2
            t1=0.2;
                // Centro
                difference(){
                    rotate([0,0,45]) cylinder(r1 = radius*1.15,r2 = radius*1.15,h=diameter*0.3,$fn=4);
                    scale([1,1,1.3]){
                    translate([0,radius*1.05,0]) rotate([0,90,0]) cylinder(r = radius*0.5,h=diameter,$fn=40,center=true);
                    translate([0,-radius*1.05,0]) rotate([0,90,0]) cylinder(r = radius*0.5,h=diameter,$fn=40,center=true);
                    rotate([0,0,90]){
                        translate([0,radius*1.05,0]) rotate([0,90,0]) cylinder(r = radius*0.5,h=diameter,$fn=40,center=true);
                        translate([0,-radius*1.05,0]) rotate([0,90,0]) cylinder(r = radius*0.5,h=diameter,$fn=40,center=true);
                    }
                    }
                }

                // Cubo_rec
                translate([0,0,diameter*0.3+0.5])
                  cube_rec([diameter*0.8,diameter*0.8,sz],rn+1);

            translate([0,0,sz]){

                // rellena laterales
                translate([radius*0.8,0,0])
                  cube_rec([diameter*0.15,diameter*0.6,sz],rn+23);
                translate([-radius*0.8,0,0])
                  cube_rec([diameter*0.15,diameter*0.6,sz],rn+57);
                translate([0,radius*0.8,0])
                  cube_rec([diameter*0.6,diameter*0.15,sz],rn+73);
                translate([0,-radius*0.8,0])
                  cube_rec([diameter*0.6,diameter*0.15,sz],rn+11);

                translate([radius*0.8,radius*0.8,0]) cylinder_rec([diameter*0.15,diameter*0.15,sz],rn+34);
                translate([radius*0.8,-radius*0.8,0]) cylinder_rec([diameter*0.15,diameter*0.15,sz],rn+36);
                translate([-radius*0.8,radius*0.8,0]) cylinder_rec([diameter*0.15,diameter*0.15,sz],rn+38);
                translate([-radius*0.8,-radius*0.8,0]) cylinder_rec([diameter*0.15,diameter*0.15,sz],rn+43);

                //Lateral cubes
                if(sx>sy){
                    space = sx-sy;
                    translate([radius+space/4,0,0])
                        cube_rec([space/2-r,sy-r,sz],rn+61);
                    translate([-(radius+space/4),0,0])
                        cube_rec([space/2-r,sy-r,sz],rn+73);
                }else{
                    space = sy-sx;
                    translate([0,radius+space/4,0])
                        cube_rec([sx-r,space/2-r,sz],rn+51);
                    translate([0,-(radius+space/4),0])
                        cube_rec([sx-r,space/2-r,sz],rn+97);
                }
            }
        }else if(opcion==6){
            // Tower

            if(radius>10){
                altura = diameter*0.75;
                translate([0,0,altura/2]){
                    difference(){
                        union(){
                            cube([diameter,diameter*0.1,altura],center=true);
                            cube([diameter*0.1,diameter,altura],center=true);
                            translate([0,0,altura*0.1])
                            cylinder(r1=0,r2=altura*0.4,h=altura*0.4);
                        }
                        translate([altura*0.95,diameter*0.5,altura*0.15])
                        rotate([90,0,0]) cylinder(r = altura*0.8,h=diameter,$fn=50);
                        translate([-altura*0.95,diameter*0.5,altura*0.15])
                        rotate([90,0,0]) cylinder(r = altura*0.8, h=diameter,$fn=50);
                        translate([-diameter*0.5,altura*0.95,altura*0.15])
                        rotate([0,90,0]) cylinder(r = altura*0.8, h=diameter,$fn=50);
                        translate([-diameter*0.5,-altura*0.95,altura*0.15])
                        rotate([0,90,0]) cylinder(r = altura*0.8, h=diameter,$fn=50);

                        translate([0,0,-altura/2]) scale([1,1,2]) sphere(altura*0.25);
                    }
                    difference(){
                        union(){
                            cube([diameter,diameter*0.05,altura],center=true);
                            cube([diameter*0.05,diameter,altura],center=true);
                            translate([0,0,altura*0.1])
                            cylinder(r1=0,r2=altura*0.4,h=altura*0.4);
                        }
                        translate([altura*1,diameter*0.5,altura*0.15])
                        rotate([90,0,0]) cylinder(r = altura*0.8,h=diameter,$fn=50);
                        translate([-altura*1,diameter*0.5,altura*0.15])
                        rotate([90,0,0]) cylinder(r = altura*0.8, h=diameter,$fn=50);
                        translate([-diameter*0.5,altura*1,altura*0.15])
                        rotate([0,90,0]) cylinder(r = altura*0.8, h=diameter,$fn=50);
                        translate([-diameter*0.5,-altura*1,altura*0.15])
                        rotate([0,90,0]) cylinder(r = altura*0.8, h=diameter,$fn=50);

                        translate([0,0,-altura/2]) scale([1,1,2]) sphere(altura*0.25);
                    }

                }
                cylinder_rec([radius*0.5,radius*0.5,sz],rn+77);
                translate([radius*0.55,radius*0.55,0]) cube_rec([radius*0.9,radius*0.9,sz],rn+23);
                translate([radius*0.55,-radius*0.55,0]) cube_rec([radius*0.9,radius*0.9,sz],rn+53);
                translate([-radius*0.55,radius*0.55,0]) cube_rec([radius*0.9,radius*0.9,sz],rn+73);
                translate([-radius*0.55,-radius*0.55,0]) cube_rec([radius*0.9,radius*0.9,sz],rn+123);

                translate([0,0,altura])
                    cube_rec([altura*0.55,altura*0.55,sz],rn+111);

                //Lateral cubes
                if(sx>sy){
                    space = sx-sy;
                    translate([radius+space/4,0,0])
                        cube_rec([space/2-r,sy-r,sz],rn+61);
                    translate([-(radius+space/4),0,0])
                        cube_rec([space/2-r,sy-r,sz],rn+73);
                }else{
                    space = sy-sx;
                    translate([0,radius+space/4,0])
                        cube_rec([sx-r,space/2-r,sz],rn+51);
                    translate([0,-(radius+space/4),0])
                        cube_rec([sx-r,space/2-r,sz],rn+97);
                }
            }else{
                translate([0,0,sz]){
                    cube_rec([sx-1,sy-1,sz],rn+1);
                }
            }
        }else{
            // Cambia a Cilindro
            translate([0,0,sz]){
                diameter = min(sx,sy);
                radius = diameter/2;
                cylinder_rec([diameter-1,diameter-1,sz],rn+10);
                //Lateral cubes
                if(sx>sy){
                    space = sx-sy;
                    translate([radius+space/4,0,0])
                        cube_rec([space/2-r,sy-r,sz],rn+25);
                    translate([-(radius+space/4),0,0])
                        cube_rec([space/2-r,sy-r,sz],rn+30);
                }else{
                    space = sy-sx;
                    translate([0,radius+space/4,0])
                        cube_rec([sx-r,space/2-r,sz],rn+47);
                    translate([0,-(radius+space/4),0])
                        cube_rec([sx-r,space/2-r,sz],rn+50);
                }

            }

        }
    }
}

module cylinder_rec(size,rn){
    sx = size[0];
    sy = size[1];
    sz = size[2];
    radius = min(sx,sy) /2;
    diameter = radius*2;

    cylinder(h=sz,r=radius,center=true);

    if( (diameter)>=min_size){
        opcion = random(1,8,rn);

        if(opcion==1){
            // Reduce
            translate([0,0,sz]){
                cylinder_rec([sx-1,sy-1,sz],rn+1);
            }
        }else if(opcion==2){
          // Columnitas
          translate([0,0,0]){
            numcols = 8;
            for(i=[1:numcols]){
              rotate([0,0,i*360.0/numcols])
                translate([radius*0.75,0,-0.5])
                  cylinder(r=radius*0.1,h=radius*0.6,$fn=50);
            }
            // tronco central
            cylinder(r1=radius*0.5,r2 = radius*0.9,h=radius*0.6,$fn=20);

            // recursion -->cylinder_rec
            translate([0,0,radius*0.6+0.5])
              cylinder_rec([diameter*0.9,diameter*0.9,sz],rn+1);

          }
        }else if(opcion==3){
          // columna de discos
          col_h = radius*0.2;
          //numcols = round(rands(3,6,1)[0]);
          numcols = 1+random(3,6,rn+1);
          for(i=[1:numcols]){
            translate([0,0,(i-1)*col_h])
              cylinder(r1=radius*0.5,r2=radius*0.7,h=col_h,$fn=50);
          }
          translate([0,0,(numcols)*col_h])
            cylinder(r1=radius*0.7,r2=radius,h=col_h,$fn=50);

          cylinder(r1=radius*0.5,r2=radius*0.5,h=col_h*(numcols+1),$fn=50);
          // recursion -->cylinder_rec
          translate([0,0,col_h*(numcols+1)+0.5])
            cylinder_rec([diameter,diameter,sz],rn+2);

        }else if(opcion==4){
            difference(){

                // Arcs
                union(){
                    intersection(){
                        sphere(radius*0.95);
                        translate([0,0,radius/2])
                            cube([diameter*0.1,diameter,radius],center=true);
                    }
                    intersection(){
                        sphere(radius*0.95);
                        translate([0,0,radius/2])
                            cube([diameter,diameter*0.1,radius],center=true);
                    }
                }
                // Cupula
                difference(){
                    sphere(radius*0.85);
                    translate([0,0,-radius/2])
                    cube([diameter,diameter,radius],center=true);
                }
            }

//          translate([0,0,radius*0.8])
//            cylinder(r=radius*0.4,h=radius*0.1);

            translate([0,0,1])
                cylinder_rec([diameter*0.7,diameter*0.7,1],rn+1);

        }else if(opcion==5){
            // Columnitas
            translate([0,0,sz-0.5]){
                // tronco central
                difference(){
                cylinder(r1=radius*0.8,r2 = radius*0.9,h=radius*0.6,$fn=20);
                union(){
                    numcols = 8;
                    for(i=[1:numcols]){
                        rotate([0,0,22.5+i*360.0/numcols])
                            translate([radius*0.5,0,0])
                                rotate([0,90,0])
                                    scale([2,1,1])
                                        cylinder(r=radius*0.2,h=radius*0.6,$fn=50);
                    }
                }
                }

                // recursion -->cylinder_rec
                translate([0,0,radius*0.6+0.5])
                cylinder_rec([diameter*0.9,diameter*0.9,sz],rn+1);

          }
        }else if(opcion==6){
            // knob
            translate([0,0,sz*0.5]){
                difference(){
                    union(){
                        cylinder(r=radius*0.9,h=radius*0.3);
                        translate([0,0,radius*0.3])
                            cylinder(r1=radius*0.9,r2=radius*0.8,h=radius*0.1);
                    }
                    union(){
                        for(i = [0:45:359]){
                            rotate([0,0,i]) translate([radius,0,0]) cylinder(r=radius*0.2,h=radius*0.41,$fn=20);
                        }

                    }
                }

                // recursion -->cylinder_rec
                translate([0,0,radius*0.4]){
                    cylinder_rec([diameter*0.8,diameter*0.8,sz],rn+97);
                }
            }

        }else if(opcion==7){

                // Arcs
                union(){
                    intersection(){
                        sphere(radius*0.95);
                        translate([0,0,radius/2])
                            cube([diameter*0.1,diameter,radius],center=true);
                    }
                    intersection(){
                        sphere(radius*0.95);
                        translate([0,0,radius/2])
                            cube([diameter,diameter*0.1,radius],center=true);
                    }
                }
                // Cupula
                difference(){
                    sphere(radius*0.85);
                    translate([0,0,-radius/2])
                    cube([diameter,diameter,radius],center=true);
                }

//          translate([0,0,radius*0.8])
//            cylinder(r=radius*0.4,h=radius*0.1);

            translate([0,0,radius*0.8])
                cylinder_rec([diameter*0.5,diameter*0.5,1],rn+1);
        }else{
            // Cambia a cubo
            translate([0,0,sz]){
                cube_rec([2*radius*0.7,2*radius*0.7,sz],rn+5);
            }
            // 4 cilindros
            translate([radius*0.85,0,sz])
                cylinder_rec([radius*0.25,radius*0.25,sz],rn+11);
            translate([-radius*0.85,0,sz])
                cylinder_rec([radius*0.25,radius*0.25,sz],rn+13);
            translate([0,radius*0.85,sz])
                cylinder_rec([radius*0.25,radius*0.25,sz],rn+17);
            translate([0,-radius*0.85,sz])
                cylinder_rec([radius*0.25,radius*0.25,sz],rn+23);

        }
    }

}

```