[User]
I'm looking to create a customizable can holder, similar to the one I made previously, but with some modifications and new features. I want to build it from the ground up, not modify the existing code.

First, the basics: I need a can holder for 3 cans, designed to fit easily on a 6-inch print bed. I also need to be able to specify the diameter of the cans, as they aren't all identical. I'd like to keep the same basic structure - a long piece with cutouts for cans, with the option of varying the shape between the cans.

Here are the specific requirements:

1.  **Number of Cans:** The design should be for exactly 3 cans.

2.  **Print Bed Size:** It needs to be designed with a 6-inch print bed in mind. Please note this, because the actual size of the model will be determined by the user's parameters, but I don't want to end up with something too big to be printed easily.

3.  **Can Diameter:** I need a variable to set the can diameter (in mm). Let's call this `canDiameter`.

4.  **Divider Thickness:** Like before, I need a variable to set the thickness of the material between the cans. Let's call this `dividerThickness`.

5.  **Divider Depth:**  I want to set how far up the can height the dividers go, let's call this `dividerDepth` (also in mm).

6.  **Between Can Shape Options:** I'd like to have the same three options for the shape between the cans, controlled by a `betweenCanShape` variable:
    *   `0`: Square edges, where the edges extend past the can cutouts
    *   `1`: Smooth curves, the curves touch the can cutouts
    *   `2`: Faceted curves, same size as cans, also touching.

7.  **End Shape:** I also need the end shape options from the previous design:
    *   `0`: Edges extend past the can cutouts.
    *   `1`: Edges stop at the can cutouts, controlled by an `endShape` variable

8.  **Faceted Curve Detail:** If `betweenCanShape` is set to `2` (faceted curve), there should be a variable to control the number of facets. Let's call this `facetCount`.

9. **Locking Mechanism:** This is a new feature I'm adding - I'd like to be able to add interlocking tabs at the edges of the can holder. These should be a separate module and have parameters for height, depth, width, and spacing. Let's call this module `lockingTab` and have it take the parameters `tabHeight`, `tabDepth`, `tabWidth`, and `tabSpacing`. These tabs should only be present when requested with a `useLockingTabs` boolean parameter.

10. **Cutouts to Reduce Fill:** I also want to be able to add cutouts to the main body of the can holder to reduce the amount of material, these should be some kind of repeating pattern. This should be a separate module, let's call it `fillCutout`, and should have the boolean parameter `useFillCutouts`. The size, shape, and spacing of the cutouts should be adjustable. This means the module should have, at a minimum, parameters `cutoutShape`, `cutoutSize`, `cutoutSpacing`. I want the cutout shapes to be one of: "circle", "square", "hexagon". The size parameter will depend on the shape, i.e. radius for circle, side length for hexagon and square.

11. **Useable Libraries:** I don't care if you have to use a library, but if you do please let me know which one it is.

Could you generate the OpenSCAD file(s) to accomplish this? I'd like a single file if that's reasonable. I'm also happy with a main file and included files as you see fit.

[Assistant]
WaveCan.scad:
```
//Config values
/* [Layout] */
//How many cans fit on the bottom row
NumberOfCansOnBottom = 4;
//How thick should it be between the cans (in mm)
DividerThickness = 5;
//How deep should it be along the height of the can (in mm)
DividerDepth = 60;  //Full can height is 121.92

BetweenCanShape = 1; //[0:square edges, 1:smooth curve, 2:faceted curve]

/* [Details] */
//Some other can size? (in mm)
CanRadius = 31.75;

//######## Between Can Options
//VERSION0 is flat surfaces
VERSION0 = BetweenCanShape == 0;
//VERSION1 is smooth curves, same size as cans
VERSION1 = BetweenCanShape == 1;
//VERSION2 is faceted curves, same size as cans, see facetCurveCount to adjust
VERSION2 = BetweenCanShape == 2;
//#####End Between Can Options

//Height of square edges option
SquareEdgesHeight = 10;

//THESE OPTIONS WORK PRETTY WELL
//Faceted curve number
facetCurveCount = 18; //[10, 12, 18, 24]

//######## End Options

//Version 0 has edges that extend past the can
//Version 1 has edges that touch the can
ENDS_VERSION = 1;  //[0:extend past can, 1:edges stop at can]]
//#####End End Options

//###### applying option calculations
retainThickness = VERSION0 ? SquareEdgesHeight/2 : DividerThickness/2;
moveShitOver = [
			//Version 0:
			0,
			//Verison 1:
			VERSION0
				?	CanRadius-sqrt(((CanRadius-retainThickness)*(CanRadius-retainThickness))
					+(CanRadius*CanRadius))
				: -CanRadius * sin(60) / 2 - retainThickness
			];
width = NumberOfCansOnBottom * CanRadius * 2
				+ moveShitOver[ENDS_VERSION]*2;

/* [Smoothness] */
$fn = 100;
/* [Hidden] */
OVERLAP=0.1;

////Setup
//canCenters = [for (i = [0:NumberOfCansOnBottom])
//{
//
//}
//];

CombineAll();

module CombineAll()
{
	difference()
	{
		//Positive
		union()
		{
			if (VERSION0) {
				MainPiece(SquareEdgesHeight);
			}

			if (VERSION1) {
				assign (offset = CanRadius * sin(60) / 2)
				{
				intersection()
				{
					translate(v=[0, offset, 0])
						MainPiece(CanRadius);
					AllCanShapes(-DividerThickness, bottom = false, overlap = false);
				}
				intersection()
				{
					translate(v=[0, -offset, 0])
						MainPiece(CanRadius);
					AllCanShapes(-DividerThickness, top = false, overlap = false);
				}
				}
			}

			if (VERSION2) {
				assign (offset = CanRadius * sin(60) / 2)
				intersection()
				{
					translate(v=[0, offset, 0])
						MainPiece(CanRadius);
					AllCanShapes(-DividerThickness, bottom = false, overlap = false, $fn = facetCurveCount);
				}
				intersection()
				{
					translate(v=[0, -offset, 0])
						MainPiece(CanRadius);
					AllCanShapes(-DividerThickness, top = false, overlap = false, $fn = facetCurveCount);
				}
			}
		}

		//Negative
		union()
		{
			AllCanShapes(DividerThickness);
		}
	}
}

module AllCanShapes(thicknessToRetain, bottom = true, top = true, overlap = true)
{
	translate(v = [moveShitOver[ENDS_VERSION], 0, 0])
		AllCanShapes_Version0(thicknessToRetain, bottom, top, overlap = overlap);
}
module AllCanShapes_Version0(thicknessToRetain, bottom = true, top = true, overlap = true)
{
	retain = thicknessToRetain/2;

	if (top)
		CanShapes([CanRadius, -CanRadius * sin(60) - retain, 0], NumberOfCansOnBottom, overlap = overlap);
	if (bottom)
		CanShapes([CanRadius*2, CanRadius * sin(60) + retain, 0], NumberOfCansOnBottom-1, overlap = overlap);
}

module MainPiece(height)
{
	difference()
	{
		//Positive
		union()
		{
			translate(v=[0, -height/2, 0])
				cube(size = [width, height, DividerDepth]);
		}

		//Negative
		union()
		{
		}
	}
}

module CanShapes(v, number, overlap = true)
{
	difference()
	{
		//Positive
		union()
		{
			translate(v=v){
				for (i = [0:number-1]) {
					translate(v=[i*2*CanRadius, 0, overlap ? -OVERLAP : 0])
						cylinder(h=DividerDepth + (overlap ? 2*OVERLAP : 0), r=CanRadius);
				}
			}
		}

		//Negative
		union()
		{
		}
	}
}

```


[User]
I'm looking to create a printable, strong, but not very flexible or reusable fastening system, similar to the provided "velcro_strong.scad" example. I'd like to create it with a few modifications and parameters to make it more versatile.

First, I want to be able to specify the overall dimensions of the fastening patch (width, length). I also want to control the height of the base, as well as the height of the "hook" elements.

The "hook" elements themselves should have a base cylinder with a user-defined diameter and height, and then a top dome. The top dome should have a diameter parameter to control its size and how much of an undercut it provides, and a height parameter to set how high it protrudes above the main body of the hook cylinder. I also want to control the number of sides of the cylinder, so it doesn't have to be six.

The spacing between the hook elements should be adjustable in both X and Y directions. And similar to the original, the rows of hooks should be offset to create a staggered pattern (like a brick wall) to ensure good interlocking.

I would like to have the option to choose between the spherical top of the hook (like in the example file) or a truncated cone. If choosing a truncated cone, I need a parameter to specify the top diameter.

Finally, I need to be able to control the margin around the edges where hooks are not generated.

Can you create an OpenSCAD design for this, preferably making use of the BOSL2 library to simplify some of the math and geometry? I'd like the code to be well-commented and easy to understand. I would like the output to be a single .scad file.

[Assistant]
velcro_strong.scad:
```
/*

Printable velcro

16/04/2015 Carles Oriol

*/

/* [Global] */

// Pacman radius

width=25;
length=25;

/* [Hidden] */

suport_height=.3;
margin=2;

botomdiam=1.2;
topdiam=.3;
maxdiam=max(botomdiam, topdiam );
velcro_height=2;
extrax=maxdiam*2.3;
extray=maxdiam*2.3 ;

distancex=topdiam+extrax;
distancey=topdiam+extray;

cube([width, length, suport_height]);

for (comptay = [margin:distancey:length-margin])
{
    step = (round((comptay-margin)/distancey) % 2)== 0 ? 0: distancex/2;

    for (comptax = [margin:distancex:(width-margin)])
    {
        translate([comptax+step, comptay, suport_height]) cylinder(r1=botomdiam, r2=topdiam, h=velcro_height, $fn=6);
        translate([comptax+step, comptay, suport_height+velcro_height-(topdiam*3)/2]) scale([1,1,.5]) sphere(r=topdiam*3.5, $fn=12);
    }

 }
```


[User]
I'd like to design a customizable 12-sided die, where each face can have different text, numbers, or even symbols on it. I need to be able to control the size of the die, the specific text on each of the 12 faces, and the depth of the text. It would be great if I could also adjust the font used and even scale each individual piece of text differently if needed. Finally, it would be amazing if I could choose to have a single-color die, or a dual-color die where the text is a different color. For the dual-color option, I would need to control the depth of the second color. The text should be centered on each face.

The design should use an OpenSCAD file, or several if necessary, and I would like it to be parametric for all of the features I described. The font should be selectable from a range of common fonts. The symbols used might need some Unicode characters. I'd prefer not to use any external libraries for this. Could you please generate the necessary OpenSCAD code?

[Assistant]
12dice.scad:
```
//---------------------------------
// Customizable 12 Dice
// Author: Monique de Wilt
// Website: Mowidesign.com
// Thanks to:  Werner Stein for adding dual color and streamlining code
// License: CC Attribution - Non-Commercial - Share Alike license. Version 2.4b (c) April 2015 please refer the complete license here: http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode
// Date: 17-april-2015
// Description: this is a customizable design to make your own 12 sided dice with numbers, text or symbols
// Off course you can change the size and the texts and furthermore you can choose a dualcolor dice. For the perfectionists there is also the possibility to change the font,the size of the texts, and the depth of the texts.
//----------------------------------
// preview[view:south, tilt:top]

/* [Essentials] */
// in mm
Size= 30; // [10:300]
//to show
part="SingleColorDice"; //[SingleColorDice,DualDice,DualLetters]
// use any letters, numbers or unicodes, see http://en.wikipedia.org/wiki/List_of_Unicode_characters
Text1= "1";
Text2= "2";
Text3= "3";
Text4= "A";
Text5= "B";
Text6= "C";
Text7= "Yes";
Text8= "No";
Text9= "\u00A9";
Text10= "\u221A";
Text11= "?";
Text12= "&";
/* [Tweaks] */
// preview here: http://www.google.com/fonts some fonts may not have all the unicode symbols
font = "Arial"; //[ABeeZee,Abel,Abril Fatface,Aclonica,Acme,Actor,Adamina,Advent Pro,Aguafina Script,Akronim,Aladin,Aldrich,Alef,Alegreya,Alegreya Sans,Alegreya Sans SC,Alegreya SC,Alex Brush,Alfa Slab One,Alice,Alike,Alike Angular,Allan,Allerta,Allerta Stencil,Allura,Almendra,Almendra Display,Almendra SC,Amarante,Amaranth,Amatic SC,Amethysta,Amiri,Anaheim,Andada,Andada SC,Andika,Angkor,Annie Use Your Telescope,Anonymous Pro,Antic,Antic Didone,Antic Slab,Anton,Antonio,Arapey,Arbutus,Arbutus Slab,Architects Daughter,Archivo Black,Archivo Narrow,Arial,Arial Black,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,Bhavuka,Bigelow Rules,Bigshot One,Bilbo,Bilbo Swash Caps,Bitter,Black Ops One,Bokor,Bonbon,Boogaloo,Bowlby One,Bowlby One SC,Brawler,Bree Serif,Bruno Ace,Bruno Ace SC,Bubblegum Sans,Bubbler One,Buda,Buenard,Butcherman,Butcherman Caps,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,Changa One,Chango,Chau Philomene One,Chela One,Chelsea Market,Chenla,Cherry Cream Soda,Cherry Swash,Chewy,Chicle,Chivo,Cinzel,Cinzel Decorative,Clara,Clicker Script,Coda,Coda Caption,Codystar,Combo,Comfortaa,Comic Sans MS,Coming Soon,Concert One,Condiment,Content,Contrail One,Convergence,Cookie,Copse,Corben,Courgette,Cousine,Coustard,Covered By Your Grace,Crafty Girls,Creepster,Creepster Caps,Crete Round,Crimson Text,Croissant One,Crushed,Cuprum,Cutive,Cutive Mono,Damion,Dancing Script,Dangrek,Dawning of a New Day,Days One,DejaVu Sans,Dekko,Delius,Delius Swash Caps,Delius Unicase,Della Respira,Denk One,Devonshire,Dhurjati,Dhyana,Didact Gothic,Dinah,Diplomata,Diplomata SC,Domine,Donegal One,Doppio One,Dorsa,Dosis,Droid Arabic Kufi,Droid Arabic Naskh,Droid Sans,Droid Sans Ethiopic,Droid Sans Mono,Droid Sans Thai,Droid Serif,Droid Serif Thai,Dr Sugiyama,Duru Sans,Dynalight,Eagle Lake,Eater,Eater Caps,EB Garamond,Economica,Eczar,Ek Mukta,Electrolize,Elsie,Elsie Swash Caps,Emblema One,Emilys Candy,Encode Sans,Encode Sans Compressed,Encode Sans Condensed,Encode Sans Narrow,Encode Sans Wide,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,Geneva,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,Helvetica,Henny Penny,Hermeneus One,Herr Von Muellerhoff,Hind,Holtwood One SC,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,Inknut Antiqua,Irish Grover,Irish Growler,Istok Web,Italiana,Italianno,Jacques Francois,Jacques Francois Shadow,Jaldi,Jim Nightshade,Jockey One,Jolly Lodger,Josefin Sans,Josefin Sans Std Light,Josefin Slab,Joti One,Judson,Julee,Julius Sans One,Junge,Jura,Just Another Hand,Just Me Again Down Here,Kadwa,Kalam,Kameron,Kantumruy,Karla,Karla Tamil Inclined,Karla Tamil Upright,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,Lemon One,Liberation Sans ,Libre Baskerville,Libre Caslon Text,Life Savers,Lilita One,Lily Script One,Limelight,Linden Hill,Lobster,Lobster Two,Lohit Bengali,Lohit Tamil,Londrina Outline,Londrina Shadow,Londrina Sketch,Londrina Solid,Lora,Loved by the King,Lovers Quarrel,Love Ya Like A Sister,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,Merge One,Merienda,Merienda One,Merriweather,Merriweather Sans,Mervale Script,Metal,Metal Mania,Metamorphous,Metrophobic,Miama,Michroma,Milonga,Miltonian,Miltonian Tattoo,Miniver,Miss Fajardose,Miss Saint Delafield,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 Bedford,Mr Bedfort,Mr Dafoe,Mr De Haviland,Mrs Sheppards,Mrs Saint Delafield,Muli,Mystery Quest,Nanum Brush Script,Nanum Gothic,Nanum Gothic Coding,Nanum Myeongjo,Nanum Pen Script,NATS,Neucha,Neuton,New Rocker,News Cycle,Niconne,Nixie One,Nobile,Nokora,Norican,Nosifer,Nosifer Caps,Nothing You Could Do,Noticia Text,Noto Sans,Noto Sans Hebrew,Noto Sans Symbols,Noto Sans UI,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,OFL Sorts Mill Goudy TT,Oldenburg,Old Standard TT,Oleo Script,Oleo Script Swash Caps,Open Sans,Open Sans Condensed,Oranienbaum,Orbitron,Oregano,Orienta,Original Surfer,Oswald,Overlock,Overlock SC,Over the Rainbow,Ovo,Oxygen,Oxygen Mono,Pacifico,Palanquin,Palanquin Dark,Paprika,Parisienne,Passero One,Passion One,Pathway Gothic One,Patrick Hand,Patrick Hand SC,Patua One,Paytone One,Pecita,Peddana,Peralta,Permanent Marker,Petit Formal Script,Petrona,Phetsarath,Philosopher,Piedra,Pinyon Script,Pirata One,Plaster,Play,Playball,Playfair Display,Playfair Display SC,Podkova,Poetsen One,Poiret One,Poller One,Poly,Pompiere,Ponnala,Pontano Sans,Poppins,Porter Sans Block,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,Puralecka Narrow,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,Redacted,Redacted Script,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,Sansation,Sansita One,Sarabun,Sarala,Sarina,Sarpanch,Satisfy,Scada,Scheherazade,Schoolbell,Seaweed Script,Sedan,Sedan SC,Sevillana,Seymour One,Shadows Into Light,Shadows Into Light Two,Shanti,Share,Share Tech,Share Tech Mono,Shojumaru,Short Stack,Siamreap,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,Stalin One,Stardos Stencil,Stint Ultra Condensed,Stint Ultra Expanded,Stoke,Strait,Strong,Sue Ellen Francisco,Sunshiney,Supermercado One,Suranna,Suravaram,Suwannaphum,Swanky and Moo Moo,Syncopate,Tahoma,Tangerine,Taprom,Tauri,Teko,Telex,Tenali Ramakrishna,Tenor Sans,Terminal Dosis,Terminal Dosis Light,Text Me One,Thabit,The Girl Next Door,Tienne,Tillana,Timmana,Tinos,Titan One,Titillium Web,Trade Winds,Trocchi,Trochut,Trykker,Tuffy,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,Verdana,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]

//Scale specific texts if necessary
S1= 1;
S2= 1;
S3= 1;
S4= 1;
S5= 1;
S6= 1;
S7= 0.6;
S8= 0.7;
S9= 1;
S10= 1;
S11= 1;
S12= 1;

// in mm
letter_depth = 1;

// in mm, should be bigger than your nozzlesize
dual_color_depth = 5;

//of dice
print_quality=80; //[80:standard,100:high,150:very high,200:best]

/* [Hidden] */
letter_size = 0.35*Size;
p = Size / 2 - letter_depth - (part=="SingleColorDice" ? 0 : dual_color_depth); // position from where the letters are extruded
scales=[[S1,S2],[S3,S4],[S5,S6],[S7,S8],[S9,S10],[S11,S12]];
letters=[[Text1,Text2],[Text3,Text4],[Text5,Text6],[Text7,Text8],[Text9,Text10],[Text11,Text12]];

function get_letter_depth() = (
part=="SingleColorDice" ? letter_depth : (
part=="DualDice" ? letter_depth + dual_color_depth + .1 : dual_color_depth)
);

module letter(l)
// Use linear_extrude() to make the letters 3D objects
linear_extrude(height = get_letter_depth(), convexity=20)
text(str(l), size = letter_size, font = font, halign = "center", valign = "center", $fn = print_quality/5);

module dodecahedron()
intersection_for(v=[[0,0,0],[1,0,116.565],[2,72,116.565],[3,2*72,116.565],[4,3*72,116.565],[5,4*72,116.565]])
assign(i=v[0],b=v[1],a=v[2])
rotate([0,0,b])
rotate([a,0,0])
cube([Size*1.2,Size*1.2,Size], center = true); //Cubes

module print_letters()
for(v=[[0,0,0],[1,0,116.565],[2,72,116.565],[3,2*72,116.565],[4,3*72,116.565],[5,4*72,116.565]])
assign(i=v[0],b=v[1],a=v[2])
rotate([0,0,b])
rotate([a,0,0])
for(j=[0,1])
rotate ([180*j, 0, 0])
translate([0, 0, p])
scale([scales[i][j],scales[i][j],1])
letter(letters[i][j]);

module Dice()
difference()
{
intersection() //intersect a sphere and the dodecahedron
{
sphere(0.57*Size,$fn=print_quality);
dodecahedron();
}
print_letters();
}
if(part=="DualLetters")
print_letters();
else
Dice();

```


[User]
I'd like to create a customizable chopstick case, and I'm thinking OpenSCAD is the best way to go. I've got some basic ideas, but I need your help putting it all together.

Basically, the case is a rectangular box with a lid. I want to be able to set the length, height, and width of the *outside* of the box. The wall thickness should be a fixed 4mm. So, the interior space will be smaller than the exterior, of course. I'd also like the ability to add text to the top of the case; it should be embossed into the surface.

Here are the parameters that I need to be able to control:

*   `length`: The length of the *outside* of the case.
*   `height`: The height of the *outside* of the case.
*   `width`: The width of the *outside* of the case.
*   `text`: The text to be embossed on the top of the case.
*   `font`: The font to use for the text. I'd like to be able to choose between at least "Letters", "Braille", and "BlackRose" fonts; I can figure out where to source these specific DXF fonts or whether we need to write them into a library. I'm planning to use the `Write` library.
*  `text_height`: The height of the text; this can be a fixed value for each of the font cases, which I can specify.
*   `text_depth`: How far the text should be embossed. Let's start with 5mm.

The case should be made by subtracting an inner cube from an outer cube, as in the example I showed, and the text should be added on the top face. It should be centered along the length and width.

Also, could you take care of the different positioning of the text for the different case widths in the file? I want to ensure the text is properly positioned relative to the width of the case and scaled appropriately. This is something I struggled with. I'd like to implement this as follows: if the case's width is 38, then the `text_height` should be 18; if the case's width is 28, then the `text_height` should be 14; if the case's width is 16, and the `font` is "Letters", then the `text_height` should be 10, and the text is slightly offset along the width; if the case's width is 16, and the `font` is not "Letters", then the `text_height` should be 10, and the text is slightly offset along the width.

Could you please generate a parametric OpenSCAD file or files that implement this? I'm sure it's going to be a bit of work, and I really appreciate the help!

[Assistant]
ChopstickCustom.scad:
```
include <write/Write.scad>
//Input your label here
text="Thingie";
font = "write/braille.dxf"; //["write/Letters.dxf":Basic, "write/braille.dxf":Braille, "write/BlackRose.dxf":BlackRose]
//Length of the case's outside
length=160; //[160,200]
//Height of the case's outside
height=11; //[11,16]
//Width of the case's outside
width=28; //[38, 28, 16]

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

union(){

difference()
{
    translate ([0,0,height/2])
    cube ([length,width,height],center=true);

    translate ([4,0,height/2])
    #cube ([length,width-4,height-4],center=true);
}

if (width == 38)
{
    writecube(text,[0,0,height],0,face="top",h=18,t=5);
}

if (width == 28)
{
    writecube(text,[0,0,height],0,face="top",h=14,t=5);
}

if (width == 16)
{

if (font == "write/Letters.dxf")
{
    writecube(text,[0,width/32,height],0,face="top",h=10,t=5);
}

else
{
    writecube(text,[0,width/8,height],0,face="top",h=10,t=5);

}
}
}
```


[User]
Alright, I need a parametric OpenSCAD file to create a clip, like the one I already started, but more customizable. The clip will be used to attach a spa cover bar to a spa cover.

Here's what I'm thinking:

*   **Overall Structure:** It should be a C-shaped clip, basically a rectangular block with a rectangular cutout in the middle, creating the clip itself.
*   **Parameters:** I need to be able to control these dimensions:
    *   `thickness`: The thickness of the clip material.
    *   `gap`: The width of the opening in the C shape, this will need to fit over something.
    *   `length`: The total length of the clip.
    *   `lip_length`: The length of a small "hook" or lip that extends inwards from the end of the gap (optional). It should be zero if there's no hook.

*   **Hook Logic:** The hook, if there is one, should extend inwards from both sides of the C-shape, reducing the width of the gap. The full gap is defined by `gap`, which needs to allow space for the spa cover, but the hook width should be deducted from the `gap` value.

*   **OpenSCAD Libraries:** I'd like the design to be written without relying on external libraries. So no MCAD or BOSL, just standard OpenSCAD primitives and logic.
I'm hoping it'll be a single .scad file. This should give me enough to create a clip I can use to hold my spa cover bar.

[Assistant]
spaclip.scad:
```
thickness = 10;
gap = 15;
length = 90;
lip_length = 5;

difference(){
  cube([gap + thickness * 2, length, thickness]);

  translate([thickness, thickness, 0])
  cube([gap, length - 2 * thickness, thickness]);

  translate([thickness, thickness, 0])
  cube([gap - lip_length, length, thickness]);

}

```


[User]
Hi, I'm looking to create a parametric filament spool holder for my 3D printer, specifically one that mounts onto the Z-rod. I have a few specific requirements and ideas in mind, and I'd like the design to be created using OpenSCAD.

First, the holder needs to have a stem that clamps onto the Z-rod. I'm thinking this should be cylindrical with a slightly inverted cone shape at the top of the z-rod bearing area to allow for smooth pivoting. The radius of the z-rod bearing area needs to be easily adjustable as a parameter, as does the length. I'd also like a parameter for the number of shells around the z-rod hole, which then determines the stem width. The overall height of the stem needs to be configurable too so it can be cut down in the slicer or used in its entirety.

Next, the holder should have an arm that extends out from the stem to hold the spool. This arm should have a lip to prevent the spool from sliding off. The arm's length, width, height and angle relative to the stem should all be adjustable via parameters. There should be a lip cutout for the spool to fit into that is also parametric.

Finally, and this is the key part, I'd like a flexible filament guide arm that comes off the main arm. This guide arm needs to be offset from the main arm to pull the filament from the spool more orthogonally. It also needs to be somewhat flexible, allowing it to give slightly during fast retraction to prevent excess tension on the filament. The guide arm should have a hole at its end for the filament, and I need to be able to toggle whether or not the guide arm is included in the design. I need parameters for the length, width, and height of the guide arm and the diameter of the guide hole. The guide arm should be angled using parameters and calculations, and that also needs to be configurable.

I'm not interested in optimizing the design based on existing work - I'd like you to create all of the necessary .scad files from scratch. I need all the dimensions and angles to be easily configurable as parameters within the design. I'd also like the design to use $fn for circle resolution, and to allow the user to print a test portion of the z-rod bearing stem before printing the whole thing. So, a parameter to print only the z-rod bearing portion for calibration is important.

Thanks in advance for your help! I hope this is all clear.

[Assistant]
psmsh.scad:
```
// Printrbot Simple Metal 1403 Spool Holder
// author: fiveangle@gmail.com
// date: 2015apr15
// ver: 1.0
// known issues: there's a bug when armWidth < stemWidth and armAngle != 90 where stem doesn't extend to arm full-width, but not really interested in fixing right now since it doesn't affect me.

// adjust to increase/decrease polygon count at expense of processing time (above 100 is probably useless)
$fn = 60; //

// actual is 148mm, but keep <125mm to fit printrbot metal build platform.
yZrodDistanceToYCenter = 124.9;

// this determines how long the 45-deg guideArm offset is
xZrodDistanceToYCenter = 6;
nozzleWidth = 0.4;

// increase to make stronger part around zrod.
shellsAroundZrod = 3;
// use printOnlyToHeight parameter to print just the zrod bearing surface to calibrate this value for tightest fit.
zRodBearingRadius = 6.26;
// this is length of zrod above z bearing block when printer head is at maximum z height
zRodBearingLength = 19;

// set by "shellsAroundZrod"; increase for strength, or replace with arbitrary width as desired.
stemWidth = 2 * (zRodBearingRadius + (shellsAroundZrod * nozzleWidth));

// symetrical be default, or replace with arbitrary length.
stemLength = stemWidth;

// maximum size that will print on Printerbot Metal. Default: 149.9
stemHeight = 149.9;

// make 13.4mm if you want to fit Taulman filament spools with 19mm holes.
armWidth = stemWidth;
armLength = 100;
armHeight = armWidth;

// increasing this may require shortening stemHeight, or rotating STL in your slicer so that arm is parallel to x or x printer axis.
armAngle = 92.5;
lipThickness = 3;
lipHeight = 4;

// increase to handle spools with greater permieter backset
lipInnerExtra = 5;
guideWidth = stemWidth;
guideLength = yZrodDistanceToYCenter - xZrodDistanceToYCenter;
guideHeight = 3;
guideWidth = 10;

// this needs to be approx 2.2mm radius, but you'll likely get a better print by making this "0" and drilling the hole manually afterward - your choice
guideHole = 2.2;
// "False" here if you don't want to include the filament guide arm
guideArm = 1; // [0:False,1:True]

// "True" here will generate a test print of just the zrod bearing section of the stem to calibrate for your zRodBearingRadius before printing entire holder.
printOnlyZrodBearing = 0; // [0:False,1:True]
printAboveZrod = printOnlyZrodBearing ? 0 : 500;
printOnlyToHeight = (zRodBearingLength + (zRodBearingRadius / 3) + 3) + printAboveZrod;

intersection() {
    translate([-5000, -10000 + printOnlyToHeight, 0]) {
        cube([10000, 10000, 10000]); // leave minimum of the zrod bearing surface to test-print tightness of zRodBearingRadius
    }

    union() {
        difference() {
            cube([stemWidth, stemHeight, stemLength]);
            translate([(stemWidth / 2), zRodBearingLength + zRodBearingRadius / 3, (stemWidth / 2)]) {
                rotate(a = 90, v = [1, 0, 0]) {
                    difference() {
                        cylinder(h = 1 + zRodBearingLength + zRodBearingRadius / 3, r = zRodBearingRadius);
                        cylinder(h = zRodBearingRadius / 2, r1 = zRodBearingRadius, r2 = 0, center = false);
                    }
                }
            }
        }
        translate([stemWidth, stemHeight, armWidth]) {
            rotate(a = 180 - armAngle, v = [0, 0, 1]) {
                rotate(a = 180, v = [0, 1, 0]) {
                    difference() {
                        cube([armHeight, armLength, armWidth]); // arm
                        translate([0, stemWidth + lipInnerExtra, 0]) {
                            cube([lipHeight, armLength - stemWidth - lipThickness - lipInnerExtra, armWidth]); // lip cutout
                        }
                    }
                    if (guideArm) {
                        translate([guideHeight, (stemWidth - guideWidth) / 2, 0]) {
                            rotate(a = 90, v = [0, 1, 0]) {
                                rotate(a = -90, v = [1, 0, 0]) {
                                    union() {
                                        cube([guideLength, guideHeight, guideWidth]);
                                        translate([guideLength, 0, 0]) {
                                            rotate(a = -45, v = [0, 1, 0]) {
                                                difference() {
                                                    cube([sqrt(pow(xZrodDistanceToYCenter + lipInnerExtra + (stemWidth / 2), 2) + pow(xZrodDistanceToYCenter + lipInnerExtra + (stemWidth / 2), 2)), guideHeight, guideWidth]);
                                                    translate([sqrt(pow(xZrodDistanceToYCenter + lipInnerExtra + (stemWidth / 2), 2) + pow(xZrodDistanceToYCenter + lipInnerExtra + (stemWidth / 2), 2)) - guideWidth / 2, 0, guideWidth / 2]) {
                                                        rotate(a = -90, v = [1, 0, 0]) {
                                                            cylinder(h = guideHeight, r = guideHole, center = false);
                                                        }
                                                    }
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
```


[User]
Hey, I'm looking to get some OpenSCAD files created for a Nerf gun bullet holder. It's designed to clip onto a belt and flex with the body. I'm picturing it as a series of hexagonal cells, each holding a single dart, connected by hinges that allow the whole thing to curve.

Here's a breakdown of what I need:

*   **Basic Structure:** The core unit is a hexagonal cell that holds a dart, with a clip section on one side for attaching to a belt. These units should be joined by hinges that allow for a curve in the overall structure.
*   **Parametric Design:** I need the number of cells in the holder to be a variable, between 3 and 14. Let's call that `Max_bullets`.
*   **Cell Dimensions:** The basic cell width should be adjustable via `unit_width`. The height of each cell, where the dart goes in, will be `unit_height`.
*   **Clip Design:** Each clip needs a small back piece, a top lip, and a small bottom lip, all integrated as part of the cell. These should extend from the back face of each hexagon. The length of the clip should be related to the `unit_width`.
*   **Hinge Design:** The hinge needs to connect adjacent cells, and allow for articulation. It needs to include a male and a female part so they rotate and lock together. The design should include clearance, and overlap, and be designed to fit.
*   **Curvature:** The holder needs to curve. The angle of the curvature should increase as the number of cells increases. The angle will be looked up in a table, based on the number of the cell, in the form of a vector.
*   **Labels:**  I'd like to be able to add text labels to each cell. The first cell will have `name1` on the front face, the last will have `name2`, and all the middle ones will have `name3`.
*   **Libraries:** This should all be able to operate with the "Write.scad" library for text.

I'm thinking I need a few modules: one for the basic hexagonal cell (`clip`), one for the left hinge part (`left`), one for the right hinge part (`right`), one for an assembled single cell (`Bulletsubunit`), one for the beginning of the chain (`First`), one for the end of the chain (`Last`), and one for the fully assembled model (`SmartElongate`).

Can you generate those files for me? Thanks!

[Assistant]
Hexammoclipv8publishedb.scad:
```
//Published under the creative commons license, share and share alike.
//My thanks to all who have contributed to the versions of openscad and modules/addins for it. Without you this would not have been possible.

//Nerf Gun Bullet Holder
//parameters

Max_bullets = 7;
clip_interval = 1;
name1 ="SIMON";
name2 ="BELT";
name3 ="AMMO";
unit_width =22.0;
unit_height =25;
total_length=unit_width*Max_bullets;
face_length=unit_width-2*unit_width/4;
echo ("face length =", face_length);
echo ("total length =",total_length);
echo ("hex size =",2*(unit_width/2-cordface_diff));
letterheight = (Max_bullets <3) ? 5:5;
clip_gap = 2.5;
cordface_diff =unit_width/2-sqrt((pow(face_length,2))-(pow(unit_width/4,2)));
echo ("cordface difference =",cordface_diff);
hex_gap = 18; //distance between the hexes
joint_thickness = 6; //thickness of the joint material
cylinder_oheight = 4; //height of outer cylinder, over the top
cylinder_iheight = 3.2;//height of the inside of the cylinder
clearance = 1; //clearance between parts of the joint
overlap = 2; //overlap between the hex and the joint
kd=unit_width/2+hex_gap/2-overlap;
angle = 40;
if  (Max_bullets % 2 == 0){echo ("even length");} else { echo ("odd length");}

//libraries

use <Write.scad>

SmartElongate ();

module First () {
union() {
		translate ([0,0,0])clip ();
		translate([unit_width/2-overlap+hex_gap/2,0,0]) left ();
		translate([0,cordface_diff-unit_width/2-0.5,unit_height/2])rotate ([-90,90,180])write (name1,t=1.3, h=letterheight, font = "orbitron.dxf", center=true);

		difference(){
			translate ([0,0,0])cylinder (h=unit_height,r=unit_width/2,$fn=6);
			translate ([0,0,0])cylinder (h= unit_height, r=7,  $fn =100);
				}

		translate ([0,0,unit_height/2])
			 for (i=[0:11]){
				rotate(i*360/12,[0,0,1])translate ([7,0,0]) sphere (r=1);
					}
					}
					}

module Last() {
	translate ([0,kd,0])
	rotate ([0,0,90])
union() {
		translate ([0,0,0])clip ();
		translate([-unit_width/2+overlap-hex_gap/2,0,0]) right ();
		translate([0,cordface_diff-unit_width/2-0.5,unit_height/2])rotate ([-90,90,180])write (name2,t=1.3, h=letterheight, font = "orbitron.dxf", center=true);
		difference(){
			translate ([0,0,0])cylinder (h=unit_height,r=unit_width/2,$fn=6);
			translate ([0,0,0])cylinder (h= unit_height, r=7,  $fn =100);
				}

		translate ([0,0,unit_height/2])
			 for (i=[0:11]){
				rotate(i*360/12,[0,0,1])translate ([7,0,0]) sphere (r=1);
					}
					}
					}

module Bulletsubunit(){
	translate ([0,kd,0])
	rotate ([0,0,90])
	union() {
		translate ([0,0,0])clip ();
		translate([unit_width/2-overlap+hex_gap/2,0,0]) left ();
		translate([-unit_width/2+overlap-hex_gap/2,0,0]) right ();
		translate([0,cordface_diff-unit_width/2-0.5,unit_height/2])rotate ([-90,90,180])write (name3,t=1.3, h=letterheight, font = "orbitron.dxf", center=true);
		difference(){
			translate ([0,0,0])cylinder (h=unit_height,r=unit_width/2,$fn=6);
			translate ([0,0,0])cylinder (h= unit_height, r=7,  $fn =100);
				}
		translate ([0,0,unit_height/2])
			 for (i=[0:11]){
				rotate(i*360/12,[0,0,1])translate ([7,0,0]) sphere (r=1);
					}
					}
					}

module clip (){
	union() {
	translate ([-face_length/2,unit_width/2-cordface_diff+clip_gap+1,0]) cube(size=[face_length,2,25], center = false);//the back piece
	translate ([-face_length/2,unit_width/2-cordface_diff,23]) cube(size=[face_length,clip_gap+3,2], center = false);// the top piece
	translate ([-face_length/2,unit_width/2+clip_gap-cordface_diff,0]) cube(size=[face_length,1.5,2], center = false);//the bottom piece

			}
}
module joint (angle=55) {

		union () {
			rotate ([0,0,angle]) translate ([0,0,0]) right ();
			left ();
}}
module right (){
	difference () {
		union () {
			translate ([0,-joint_thickness/2,(cylinder_oheight+clearance)])cube (size = [hex_gap/2,joint_thickness,unit_height-2*cylinder_oheight-2*clearance], center = false);
			translate ([0,0,cylinder_oheight+clearance]) cylinder (r=5,h=unit_height-2*cylinder_oheight-2*clearance, $fn=50);}
		   translate ([0,0,cylinder_oheight+clearance])cylinder (r=3.9,h=unit_height-2*cylinder_oheight-2*clearance, $fn=50);
}}

module left (){
		union (){
		translate ([0,0,0]) cylinder (r=3.4, h=(unit_height), $fn=50);
		translate ([-hex_gap/4,0,cylinder_oheight/2])cube (size = [hex_gap/2,joint_thickness,cylinder_oheight], center = true);
		translate ([-hex_gap/4,0,unit_height-cylinder_oheight/2])cube (size = [hex_gap/2,joint_thickness,cylinder_oheight], center = true);
}}
function Getangle (a) = lookup (a,[[1,0],[2,45],[3,80.2644],[4,110.264],[5,136.829],[6,160.924],[7,183.132],[8,203.837],[9,223.308],[10,241.743],[11,259.291],[12,276.07],[13,292.172],[14,307.673]]);

function sumv(v,i,s=0) = (i==s ? v[i] : v[i] + sumv(v,i-1,s));

vec= [0, asin(1/sqrt(2)),asin(1/sqrt(3)),asin(1/sqrt(4)),asin(1/sqrt(5)),asin(1/sqrt(6)),asin(1/sqrt(7)),asin(1/sqrt(8)),asin(1/sqrt(9)),asin(1/sqrt(10)),asin(1/sqrt(11) )];

module SmartElongate () {
			translate ([2*kd,-kd,0])rotate([0,0,90])First ();
			for (i=[0:Max_bullets-3]){
									echo (sumv(vec,i,0));
									rotate ([0,0,sumv(vec,i,0)])translate ([sqrt(i+1)*2*kd,0,0])Bulletsubunit();}
			rotate ([0,0,sumv(vec,Max_bullets-2,0)])translate ([sqrt(Max_bullets-1)*2*kd,0,0])Last ();}

```


[User]
Hey, I'm looking to get some help designing a parametric filament spool, and maybe some other related parts down the line, in OpenSCAD. I've been playing around with it a bit, but I think I could use some help getting a more robust setup.

Here's the gist of what I want:

**Core Spool Design:**

*   I need a spool that has adjustable width, outer diameter, and channel depth where the filament sits. I want to be able to easily tweak these for different filament amounts and setups.
*   The spool should have a central hub with an adjustable inner diameter and hub thickness. I want this to be able to fit various spool holders.
*   I need to have angled fillets to ensure overhangs don't require supports during printing. I like that they look nice, too.
*   I want to have options for filament holes so I can secure the start and end of the filament. These need to be sized based on the filament diameter I'm using.  If the user selects "No," then no such holes should be made.
*   The main part of the spool needs to be hollowed out, which it looks like you're doing with a difference operation; make sure this remains consistent.
*   I like the idea of using supports to connect the hub to the outer part of the spool. These supports need to be adjustable in thickness. I'd like the option to add holes to the supports themselves, too, so I can reduce the amount of plastic.  Again, the absence of holes should be an option.
*   I'd also like the option of specifying the filament diameter so that the filament holes, when created, are the right size.

**Parametric Controls:**

I want the following parameters to be adjustable, and the code to check that my hub isn't going to be bigger than the space provided for it:

*   `spool_width`: Width of the spool (in mm).
*   `spool_diameter`: Outer diameter of the spool (in mm).
*   `channel_depth`: Depth of the filament channel (in mm).
*   `filament_holes`: A "Yes/No" toggle to enable or disable filament holes.
*   `filament_diameter`: Diameter of the filament (in mm), used for filament hole sizing.
*   `hub_diameter`: Inner diameter of the hub (in mm).
*   `hub_thickness`: Thickness of the hub (in mm).
*  `support_thickness`: Thickness of the supports connecting the hub to the outer ring.
*  `support_holes`: "Yes/No" toggle to enable holes in the supports.

I'm also looking for a relatively high level of smoothness, so I want to set `$fn` to 80.

I'm not using any particular libraries right now, so I don't need any special imports or anything. Could you generate the necessary OpenSCAD files for this? I'd like a single file, unless you think it would be significantly cleaner to split it.

[Assistant]
filament_spool.scad:
```
/**
Parametric loose filament spool
**/

/* [Spool Options] */
// Width of spool (mm)
spool_width = 25; //[10:100]
// Outer diameter of spool (mm)
spool_diameter = 130; //[60:240]
// Depth of filament channel (mm) *Depth near spool edges will be affected by fillet
channel_depth = 18; //[10:40]
// Filament holes *Include holes to hold start and end of filament
filament_holes = "Yes"; //[Yes,No]
// Diameter of filament (mm) *Used to make holes to hold filament if enabled
filament_diameter = 1.75; //[1.0:5.0]
/* [Hub Options] */
// Inner diameter of hub (mm)
hub_diameter = 34; //[5:80]
// Hub thickness (mm)
hub_thickness = 5; //[5:12]
/* [Support Options] */
// Thickness of supports (mm)
support_thickness = 5; //[4:12]
// Enable or disable holes on supports
support_holes = "Yes"; //[Yes,No]
/* [Hidden] */
spool_inner_diameter = (spool_diameter-(channel_depth*2));
wall_thickness = 2;
filament_hole_diameter = filament_diameter+.5;
hub_outer_diameter = hub_diameter+(hub_thickness*2);
support_length = ((spool_inner_diameter/2)-(hub_outer_diameter/2))+1;
support_hole_diameter = support_length/2;

$fn=80;

if (hub_diameter+hub_thickness > (spool_diameter-channel_depth*2)-4) {
  echo("Hub diameter is greater that spool diameter, please adjust!");
} else {
  spool();
}

module ring_fillet_angled(ring_radius,profile_angle,fillet_width,fillet_height)
{
  fillet_height = fillet_height == undef ? fillet_width : fillet_height;
  rotate_extrude(convexity=10)translate([ring_radius,0,0])rotate([0,0,profile_angle])polygon( points=[[0,0],[fillet_width,0],[0,fillet_height]] );
}

module hub() {
  difference() {
    cylinder(r=hub_outer_diameter/2,h=spool_width);
    translate([0,0,-.1])
      cylinder(r=hub_diameter/2,h=spool_width+.2);
  }
}

module create_support_holes() {
  translate([(hub_outer_diameter/2)+(support_length/2),(support_thickness/2)+0.5,spool_width/2])
    rotate([90,0,0])
      cylinder(r=support_hole_diameter/2,h=support_thickness+1,$fn=30);
  translate([(support_thickness/2)+0.5,(hub_outer_diameter/2)+(support_length/2),spool_width/2])
    rotate([270,0,90])
      cylinder(r=support_hole_diameter/2,h=support_thickness+1,$fn=30);
  translate([-((hub_outer_diameter/2)+(support_length/2)),(support_thickness/2)+0.5,spool_width/2])
    rotate([90,0,0])
      cylinder(r=support_hole_diameter/2,h=support_thickness+1,$fn=30);
  translate([(support_thickness/2)+0.5,-((hub_outer_diameter/2)+(support_length/2)),spool_width/2])
    rotate([270,0,90])
      cylinder(r=support_hole_diameter/2,h=support_thickness+1,$fn=30);
}

module support() {
  difference() {
    union() {
      translate([(hub_diameter/2)+(hub_thickness-.5),0,spool_width/2])
        rotate([90,90,90])
          linear_extrude(height = support_length, center = false, convexity = 5, twist = 0,slices = 256)
            square(size = [spool_width,support_thickness/2],center = true);
      translate([0,(hub_diameter/2)+(hub_thickness-.5),spool_width/2])
        rotate([0,90,90])
          linear_extrude(height = support_length, center = false, convexity = 5, twist = 0,slices = 256)
            square(size = [spool_width,support_thickness/2],center = true);
      translate([-((hub_diameter/2)+(hub_thickness-.5)),0,spool_width/2])
        rotate([270,90,90])
          linear_extrude(height = support_length, center = false, convexity = 5, twist = 0,slices = 256)
            square(size = [spool_width,support_thickness/2],center = true);
      translate([0,-((hub_diameter/2)+(hub_thickness-.5)),spool_width/2])
        rotate([90,90,0])
          linear_extrude(height = support_length, center = false, convexity = 5, twist = 0,slices = 256)
            square(size = [spool_width,support_thickness/2],center = true);
    };
    if (support_holes == "Yes") {
      create_support_holes();
    }
  }
}

module create_filament_holes() {
  translate([(spool_diameter/2)-(filament_hole_diameter+0.6),0,0])
    rotate([0,0,90])
      cylinder(r=(filament_hole_diameter/2)+.25,h=5);
  translate([0,(spool_diameter/2)-(filament_hole_diameter+0.6),0])
    rotate([0,0,90])
      cylinder(r=(filament_hole_diameter/2)+.25,h=5);
  translate([-((spool_diameter/2)-(filament_hole_diameter+0.6)),0,0])
    rotate([0,0,90])
      cylinder(r=(filament_hole_diameter/2)+.25,h=5);
  translate([0,-((spool_diameter/2)-(filament_hole_diameter+0.6)),0])
    rotate([0,0,90])
      cylinder(r=(filament_hole_diameter/2)+.25,h=5);
  translate([((spool_diameter/2)-(channel_depth-3)),-5,spool_width/2])
    rotate([90,0,-45])
      cylinder(r=(filament_hole_diameter/2)+.25,h=sqrt(pow((spool_inner_diameter/2),2)+pow((spool_inner_diameter/2),2))+5);
}

module outer_ring() {
  difference() {
    union() {
      difference() {
        cylinder(r=(spool_inner_diameter/2)+2,h=spool_width);
        translate([0,0,-.1])
          cylinder(r=spool_inner_diameter/2,h=spool_width+.2);
      }
      difference() {
        cylinder(r=spool_diameter/2,h=wall_thickness);
        translate([0,0,-.1])
          cylinder(r=spool_inner_diameter/2,h=wall_thickness+.2);
      }
      translate([0,0,wall_thickness])
          rotate([0,180,0])
            ring_fillet_angled((spool_inner_diameter/2)+(wall_thickness-1),270,(spool_width-wall_thickness)/4,channel_depth-(wall_thickness-1));
      translate([0,0,spool_width-wall_thickness])
        difference() {
          cylinder(r=spool_diameter/2,h=wall_thickness);
          translate([0,0,-.1])
          cylinder(r=spool_inner_diameter/2,h=wall_thickness+.2);
        }
      translate([0,0,spool_width-wall_thickness])
        ring_fillet_angled((spool_inner_diameter/2)+(wall_thickness-1),270,(spool_width-wall_thickness)/2.5,channel_depth-(wall_thickness-1));
    }
    if (filament_holes == "Yes") {
      create_filament_holes();
    }
  }
}

module spool() {
  union() {
    hub();
    support();
    outer_ring();
  }
}
```


[User]
Hey, I'd like to get a custom camera cover designed for my laptop. It'll be a simple, rectangular clip that slides over the top of the laptop screen. The design should allow for customization of its dimensions, especially the internal width, wall thickness, height, and overall width.

Specifically, the cover will have a "U" shape profile when viewed from the side. The inner space should be rectangular, sized to accommodate the laptop screen's thickness and a little extra wiggle room. It will have a base, a back wall, and a lip that creates the U shape. I want to use a Minkowski sum to round the edges a little bit and make them a bit less sharp, but that should be configurable as well.

Here are the key parameters that should be adjustable:

*   `vnitrniSirka`: The inner width of the clip, that is, the size of the opening that fits over the monitor.
*   `sirkaSteny`: The thickness of the walls of the clip.
*   `vyska`: The height of the clip.
*  `sirka`: The overall width of the clip.
*   `minkowskiSirka`: The size of the radius used for rounding with the Minkowski sum.

Could you generate an OpenSCAD file for this? It would be a great help. I am also open to suggestions on how to optimize the design if you think there's a better approach.

[Assistant]
cap.scad:
```
// krytka na kameru notebooku
// by geniv

/* [Global] */

// inner width
vnitrniSirka=12; // [5:40]

// wall thickness
sirkaSteny=4; // [2:8]

// height
vyska=25; // [10:30]

// width
sirka=24; // [10:30]

/* [Hidden] */
$fn=40;

/* [Hidden] */
minkowskiSirka=2;

module main() {
  vnitrniSirka=vnitrniSirka+minkowskiSirka;  // fix minkowski
  minkowski() {
    difference() {
        union() {
            translate([0,vnitrniSirka/2,vyska])
            rotate([0,90,0])
            cylinder(r=(vnitrniSirka+sirkaSteny+sirkaSteny)/2,h=sirka);

            translate([0,-sirkaSteny,0])
            cube([sirka,vnitrniSirka+2*sirkaSteny,vyska]);
        }
        translate([-1,vnitrniSirka/2,vyska])
        rotate([0,90,0])
        cylinder(r=vnitrniSirka/2,h=sirka+2);

        color("blue")
        translate([-1,0,-1])
        cube([sirka+2,vnitrniSirka,vyska+1]);
    }
    cylinder(r=minkowskiSirka/2);
  }
}

main();
//color("red") translate([0,1,-1]) cube(11);
```


[User]
I'm looking to design a retail display for lip balm tubes. I'd like it to have a grid of oval-shaped holes to hold the tubes, and be fully parametric so I can easily change the size and layout.

Specifically, I need the following parameters:
*   `holesx`: The number of holes in the x-direction (across the width).
*   `holesy`: The number of holes in the y-direction (along the depth).
*   `tubewidth`: The width of each oval hole.
*   `tubeheight`: The height of each oval hole.
*   `tubedepth`: The depth of each oval hole.
*   `spacing`: The distance between the holes both in x and y directions.

The holes should be created by subtracting an oval-shaped cutout from a slightly larger rectangular block. The oval cutout should be created by scaling a cylinder. The design should generate a grid of these holes based on the specified `holesx` and `holesy`.

Could you generate the OpenSCAD code for this? I don't need any specific libraries, just vanilla OpenSCAD functionality is fine.

[Assistant]
Ellovi-Retail-Display-OpenSCAD.scad:
```
//Change these

holesx = 4;
holesy = 6;

$fn=50;

tubewidth = 14;
tubeheight = 21;
tubedepth = 9;

spacing = 6;

 module hole() {
difference() {
translate([0,0,5]) cube([tubewidth+spacing,tubeheight+spacing,tubedepth+2], center = true);
translate([0,0,2]) resize([tubewidth,tubeheight,tubedepth]) oval(tubewidth,tubeheight,tubedepth);
}
 }

module oval(w,h, height, center = false) {
  scale([1, h/w, 1]) cylinder(h=height, r=w, center=center);
}

for ( w = [1 : holesx] )
{
translate([0,w * (tubeheight+spacing), 0])
for ( d = [1 : holesy] )
{
        translate([d * (tubewidth+spacing), 0, 0]) hole();
}

}
```


[User]
Hey, I'm looking to create a customizable Hilbert cube design using OpenSCAD. I've been playing around with an existing script that uses recursive functions, but I'd like a version where I can easily control more aspects of the final model, and perhaps make it more versatile.

Ideally, the design should be fully parametric. Here are the core features I'd like it to have:

*   **Hilbert Curve Generation:** The main structure should be a 3D Hilbert curve, similar to what's already being produced in the code I have, but generated from scratch.
*   **Iteration Control:** I need to be able to specify the number of iterations for the Hilbert curve. More iterations = more complex and detailed structure, as in the existing code.
*   **Spacing Control:** I need a parameter to control the spacing between adjacent sections of the curve. This will affect how dense or sparse the overall shape is.
*   **Beam Width/Thickness Control:**  I want to control the thickness of the "beams" that make up the curve, similar to how the existing code does it with the `beam_width` parameter.
*   **Corner Generation:** I need to generate distinct "corners" at the locations where the Hilbert curve turns, as in the original code. They can just be cubes, but I need the ability to control the dimensions of the corners independently of the beam widths.
*   **Randomization Option:** It would be great to include an option that randomizes the iteration count, spacing, and beam widths within specified ranges, just like the existing code does.
*   **Modular Design:** I'd like to have the code structured in modules so that it's easier to read and modify if I need to change it later.
*   **Units:** I'd like to use generic units, so that if I need to scale it, I don't need to change any specific parameters, I can just scale the entire model with a single factor.

Basically, I'm looking for a robust, parametric Hilbert curve generator that allows for fine-grained control over the appearance and complexity of the structure. It would need to handle everything from the curve generation to the rendering of the beams and corners. The original code I was working off of uses a recursive function, and that might be a good way to go about it, but I'm open to anything that generates a good design!

I don't need any special libraries, just the standard OpenSCAD functions.

Can you help me with that?

[Assistant]
Hilbert.scad:
```
//Script adapted from http://thomasdiewald.com/blog/?p=561

/* [Main Parameters] */
//May increase processing time
Iterations = 1;//[0:3]

//How far apart the beams are
Spacing = 5;//[3:Extra Tight,4: Tight,5:Normal,7:Wide,10:Extra Wide,15:Extremely Wide]

//% Realative to corners
beam_width = 100;//[1:100]

/* [Randomization] */

//Ignore Main Parameters and randomize. The final model may be different from the preview.
randomized = 0;//[0:No,1:Yes]

minimum_iterations = 0;//[0:3]
maximum_iterations = 3;//[0:3]

minimum_spacing = 3;//[3:Extra Tight,4: Tight,5:Normal,7:Wide,10:Extra Wide,15:Extremely Wide]
maximum_spacing = 10;//[3:Extra Tight,4: Tight,5:Normal,7:Wide,10:Extra Wide,15:Extremely Wide]

minimum_beam_width = 10;//[1:100]
maximum_beam_width = 100;//[1:100]

/* [Hidden] */
if(randomized == 0) //Execute normally if not randomized
drawhilbert(Spacing, Iterations, beam_width);

if(randomized == 1) //Randomize Paramaters
    drawhilbert(rands(minimum_spacing,maximum_spacing,1)[0],floor(rands(minimum_iterations,maximum_iterations + 1,1)[0]),rands(minimum_beam_width,maximum_beam_width,1)[0]);

module drawhilbert(spacing, iterations, beam_width){
flatmult = pow(2,iterations+1);//Used in flatten function

size = pow(2,iterations) * spacing/5;//Used for consistent spacing

nums = flatten(hilbert(size = size, iterations = iterations),flatmult);//Generates flat array of numbers

beam_offset = [1-beam_width/100,1-beam_width/100,1-beam_width/100];//Generates beam offset

cubes= [for(a = [0:len(nums)-1]) if(a %3 == 0) [nums[a],nums[a+1],nums[a+2]]];//Changes flat array into array of cube vectors

for(a = [0:len(cubes)-2]){
    line(cube1=cubes[a],cube2=cubes[a+1],beam_width = beam_width,beam_offset = beam_offset);
    }//Goes through vector and renders cubes
}
function hilbert(center = [0,0,0], size, iterations, a=0,b=1,c=2,d=3,e=4,f=5,g=6,h=7)=(iterations >= 0)?
     //Recursive logic

        [[hilbert(corner(a,center, size), size*.5, iterations - 1, a,d,e,h,g,f,c,b)],
        [hilbert(corner(b,center, size),size*.5, iterations - 1,a,h,g,b,c,f,e,d)],
        [hilbert(corner(c,center, size),size*.5, iterations - 1,a,h,g,b,c,f,e,d)],
        [hilbert(corner(d,center, size),size*.5, iterations - 1,c,d,a,b,g,h,e,f)],
        [hilbert(corner(e,center, size),size*.5, iterations - 1,c,d,a,b,g,h,e,f)],
        [hilbert(corner(f,center, size),size*.5, iterations - 1,e,d,c,f,g,b,a,h)],
        [hilbert(corner(g,center, size),size*.5, iterations - 1,e,d,c,f,g,b,a,h)],
        [hilbert(corner(h,center, size),size*.5, iterations - 1,g,f,c,b,a,d,e,h)]]:center
    ;

function corner(cnr, center, size) = (cnr == 0)?[center[0] - size,center[1] + size,center[2] - size]:
(cnr == 1)?[center[0] - size,center[1] + size,center[2] + size]:
(cnr == 2)?[center[0] - size,center[1] - size,center[2] + size]:
(cnr == 3)?[center[0] - size,center[1] - size,center[2] - size]:
(cnr == 4)?[center[0] + size,center[1] - size,center[2] - size]:
(cnr == 5)?[center[0] + size,center[1] - size,center[2] + size]:
(cnr == 6)?[center[0] + size,center[1] + size,center[2] + size]:
[center[0] + size,center[1] + size,center[2] - size];//Gets corner value from index, because functions cannot generate an array of corners

function flatten(l,i)=(i>0)? flatten([for(a=l) for(b = a) b],i-1):l;//Flattens arrays through recursion

 module line(cube1,cube2,beam_width,beam_offset){//Actual rendering
     translate(cube1)cube(1);//Generates corners
        translate(cube2)cube(1);
    hull(){//Generates beams
        translate(cube1+(beam_offset/2))cube(beam_width/100);
        translate(cube2+(beam_offset/2))cube(beam_width/100);}
}

```


[User]
Hey, I'm looking for a design for a parametric dice holder, specifically for standard cubic dice, and I want it to be customizable in a few different ways. I’d like the design to allow for different dice sizes and fit tolerances. So, the user should be able to specify the actual die size (in mm) and the amount of extra room around the die. I also want the option to mark the bottom of the well with the die size. Finally, a few visual options: I'd like to control the wall thickness at the top of the holder, have the option to add an arrow indicator on one side, and choose between hard or rounded corners.

To summarize, here's what I need to be able to adjust:

*   **Die Size:** The actual size of the die in mm (e.g., 16mm, 24mm).
*   **Fit:**  The clearance between the die and the holder (e.g., 0.25mm for a snug fit, 0.5mm for a loose fit). This should be an independent value, not based directly on Die Size.
*   **Tagged:** A boolean (yes/no) to determine whether the die size is marked at the bottom of the well.
*   **Wall Thickness:** The thickness of the wall at the top of the holder (in mm).
*   **Arrow:**  An option to choose an arrow indicator (0 = none, 1 = Style 1, 2 = Style 2).
*   **Corner Style:** Choice between hard or rounded corners (0 = rounded, 1 = hard).

I'd also like a small, customizable tag added to the bottom. I want it to be a 2D element, roughly square in shape, with a star in each of the top corners and bottom-left corner. I'd like to be able to specify the size of the overall tag and if it should have a border, or a border width, with the stars contained by the bordered square. The tag will also have a kind of angled line crossing from the top left to bottom right corners. It's important that the whole tag be scalable to different dice sizes and that it be recessed into the design.

Finally, I think you need to use the `offset()` function to make rounded corners easier to implement, and also to make the design more robust.

I don't have any code to provide, but I think it'd be great if it didn't require any external libraries.

[Assistant]
DieHolder_V2.scad:
```
// Cubic Dice Holder

//Size of die in mm
Size=16;
//Normally want to give the die some room to slide in and out easily but maybe you have a different idea
Fit=0.5; //[0:Tight,0.25:Snug,0.5:Loose]
//Mark the bottom of the well with the die size?
Tagged=1; //[0:No,1:Yes]
//Thickness of the wall at the top of the die holder.
WallThickness=3;
//Add an arrow to the south side as an indicator.
Arrow=2; //[0:None,1:Style 1, 2:Style 2]
// Hard or rounded corners
CornerStyle=0;//[0:Round,1:Hard]

DieSize=Size+Fit;

/*
difference(){
 union(){
  linear_extrude(height=DieSize*2,scale=0) {
   union(){
    intersection(){
     square(DieSize+4*WallThickness,center=true);
     rotate([0,0,45]) square((DieSize+6*WallThickness)*1.0, center=true);
    }
    if (Arrow==2){
     translate([0,-DieSize/2-WallThickness*2.5,0]) rotate([0,0,-90]) scale([1,1.5,1]) circle(r=WallThickness,$fn=3);
    }
   }
  }
  if (Arrow==1){
   linear_extrude(height=DieSize,scale=0) translate([0,-DieSize/2-WallThickness*2.5,0]) rotate([0,0,-90]) scale([1,1.5,1]) circle(r=WallThickness,$fn=3);
  }
 }
 translate([0,0,DieSize/2+WallThickness]) cube(DieSize, center=true);
 translate([0,0,DieSize*1.33+WallThickness]) cube(DieSize*2,center=true);
 if (Tagged) translate([0,0,WallThickness]) linear_extrude(height=1, center=true) text(str(Size), size=Size/16*10, halign="center", valign="center");
}
*/

HeightFactor=3;

function from_polar(r=1,theta=60) = [r*cos(theta),r*sin(theta)];

module star_5(radius=10,inner=0.4){
 polygon([
  from_polar(radius,0),
  from_polar(radius*inner,36),
  from_polar(radius,72),
  from_polar(radius*inner,72+36),
  from_polar(radius,72*2),
  from_polar(radius*inner,72*2+36),
  from_polar(radius,72*3),
  from_polar(radius*inner,72*3+36),
  from_polar(radius,72*4),
  from_polar(radius*inner,72*4+36)]
 );
}

module CCTag2D(Size=20, Border=true){
 BorderWidth=(Size>=20)&&Border?Size/20:0;
 ESize=Size-4*BorderWidth;
 StarSize=ESize/5;
 ChevronWidth=ESize/5;
 ChevronAngle=35;

 intersection(){
  union(){
   // actual tag elements:
   translate([0,-ESize/2+StarSize,0]) rotate([0,0,90]) star_5(StarSize);
   translate([-ESize/2+StarSize,ESize/2-StarSize,0]) rotate([0,0,90]) star_5(StarSize);
   translate([ESize/2-StarSize,ESize/2-StarSize,0]) rotate([0,0,90]) star_5(StarSize);
   translate([0,ChevronWidth,0]) for (i=[0,1]) mirror([i,0,0]) rotate([0,0,-ChevronAngle]) translate([0,-ChevronWidth]) square([ESize,ChevronWidth]);
  }
  square(ESize,center=true);
 }
 if (BorderWidth){
  difference(){
   square(Size,center=true);
   square(Size-BorderWidth*2,center=true);
  }
 }
}

$fn=30;
difference(){
 union(){
  translate([0,0,DieSize/HeightFactor+WallThickness])
   rotate([180,0,180])
    linear_extrude(height=DieSize/HeightFactor+WallThickness, scale=1.25){
     if (CornerStyle){
      offset(delta=WallThickness,chamfer=true) square(DieSize,center=true);
     }
     else {
      offset(r=WallThickness,chamfer=true) square(DieSize,center=true);
     }
     if (Arrow==2)
      translate([0,-DieSize/2-WallThickness*1.5,0]) rotate([0,0,-90]) scale([1,1.5,1]) circle(r=WallThickness,$fn=3);
    }
   if (Arrow==1){
    intersection(){
     linear_extrude(height=DieSize,scale=0) translate([0,-DieSize/2-WallThickness*2.5,0]) rotate([0,0,-90]) scale([1,1.5,1]) circle(r=WallThickness,$fn=3);
     cube([DieSize*2,DieSize*3,DieSize], center=true);
    }
   }
  }

 //Cutouts:
 translate([0,0,WallThickness]) linear_extrude(height=DieSize)
  if (CornerStyle){
   offset(delta=Fit, chamfer=true) square(Size,center=true);
  }
  else{
   offset(r=Fit, chamfer=true) square(Size,center=true);
  }
  if (Tagged) translate([0,0,WallThickness]) linear_extrude(height=1, center=true) text(str(round(Size)), size=Size/16*10, halign="center", valign="center");
  translate([0,-Size/2-Fit,Size/HeightFactor/2+WallThickness]) rotate([90,0,0]) linear_extrude(height=0.5,center=true) CCTag2D(Size/HeightFactor);
}

```


[User]
Hey, I'm looking to create some parametric connectors for foam board, and I'd love some help with the OpenSCAD design. I have a couple of different use cases in mind.

First, I need a connector to join two pieces of foam board edge-to-edge, like you might use when building a box out of foam board. I'd like this connector to be basically a 'U' shape that the two boards fit into. The 'U' should be fairly snug, with the board resting on the bottom of the 'U'.

Second, I need a similar connector, but instead of joining two pieces of foam board, I want it to join one edge of foam board to the edge of a piece of plywood or thick board. This would involve one side of the 'U' being a little thicker to account for the thicker material. The plywood would sit on the bottom of the 'U'.

It'd be really awesome if the SCAD file was parametric so I can easily adjust the foam board thickness and the plywood/thick board thickness. I'd like to specify how deep the 'U' is, too, so I can control how much of the boards the connector grabs, and the overall length of the connector as well. I don't need it to be fancy but I would like a tight fit.

Could we use a minkowski operation to add fillets to the inner edges so the corners have a little more strength? I would really like this to be parametric as well so I could increase or decrease the amount of roundness/fillet. Finally, I'd love it if the output had the connector rotated correctly for 3D printing - I think it would make the most sense to print these laying flat, so the 'U' is open on the z axis. I'm hoping that the connectors would each be modeled as a single module that can be enabled/disabled for output.

Thanks in advance! I have no preference on libraries - anything is fine.

[Assistant]
Chris_foam_board_connectors.scad:
```
/*************************************************/
/* Foam board connectors v1.0                    */
/*                                               */
/* Two different sizes:                          */
/*   - Foam to Foamfor plywood                   */
/*   - Foam to plywood table top ( 7/16" )       */
/*                                               */
/* By Cpayne3d - 2015                            */
/*************************************************/

plywood_thick = 11;         // plywood/tabletop thickness value ( 11mm = 7/16" )
foam_thick = 4.9;           // foam board thickness value       ( 4.9mm = common foam board)

// Select which type of connector to export....
output = 2;                 // 1 = plywood to foam
                            // 2 = foam to foam

if (output == 1) {
rotate([0, 270, 0]) plywood_bracket();
}

if (output == 2) {
rotate([0, 270, 0]) foamtofoam();
}

module plywood_bracket() {
difference() {
union() {

 minkowski() {
     cube([20, 25, plywood_thick+6]); // primary plywood cube
     cylinder(h=1, r=1, $fn=20);
    }

 minkowski() {
     translate([0, 0, plywood_thick+6]) cube([20, foam_thick + 6, 20]); // primary foam cube
     rotate([0, 0, 90]) cylinder(h=1, r=1, $fn=20);
    }

 } // //end union

union() {
 translate([-1, 3, 3]) color("Red") cube([20+2, 25+1, plywood_thick]);  // trim out plywood core

 translate([-1, 3, plywood_thick+6]) cube([20 +2, foam_thick, 20+2]); // primary foam core

 }  // end union

} // end difference

} // end module

module foamtofoam() {
difference() {
union() {

 minkowski() {
     cube([10, 25, foam_thick + 6]); // primary plywood cube
     cylinder(h=1, r=1, $fn=20);
    }

 minkowski() {
     translate([0, 0, foam_thick + 6]) cube([10, foam_thick + 6, 20]); // primary foam cube
     rotate([0, 0, 90]) cylinder(h=1, r=1, $fn=20);
    }

 } // //end union

union() {
 translate([-1, 3, 3]) color("Red") cube([20+2, 25+1, foam_thick]);  // trim out plywood core

 translate([-1, 3, foam_thick + 6]) cube([20 +2, foam_thick, 20+2]); // primary foam core

 }  // end union

} // end difference

} // end module
```


[User]
I want to design a vase that has a star-like cross-section. It should be based on a regular polygon (like a triangle, square, pentagon, hexagon, etc.) but with points extending outwards and inwards from each vertex. I'd like to control a few things, like how many sides it has, how far those points extend outwards and inwards, the overall height, how much of the interior space should be "hollow" or filled in, the thickness of the bottom, the twist of the vase from bottom to top, and the overall scale.

Specifically:

*   **Number of Sides:** I want to be able to specify how many "points" the star has - this should correspond to the number of sides of the base polygon (e.g. 3 for a triangle with points, 5 for a pentagon with points, etc.)
*   **Outer Star Size:** How far the points of the "star" extend outward from the center of the vase.
*   **Inner Star Size:** How far the points of the "star" extend inward from the center of the vase.
*   **Hollow Area:** I want to be able to control how much of the interior space of the star is actually filled in. Think of it like setting a percentage, from 0 to 100%, where 0% would be completely hollow, and 100% would be a solid star-shaped polygon at the base, but only with the star shape at the base, the sides would still be hollow.
*   **Height:** The overall height of the vase.
*   **Bottom Height:** The thickness of the base of the vase.
*   **Twist:** The amount of rotation in degrees applied from the bottom to the top of the vase.
*   **Scale:** An overall scaling factor for the entire vase, expressed as a percentage.

Could you generate an OpenSCAD file (or files) that can do this? I don't think I need any libraries, but let me know if you think otherwise.

[Assistant]
starVase5.scad:
```
// How many sides there are
sides = 10; // [3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
// The distance of the points outside
outerStarSize = 80; // [10:100]
// The distance of the points inside
innerStarSize = 60; // [5:90]
// Percent of interior space
hollowArea = 90; // [10:90]
// Height
h = 150; // [10:300]
// Thickness of the bottom
bottomHeight = 10; //[5:40]
// Twist of model
t = 90; // [-360:360]
// Scale of model (%)
s = 80; // [20:200]

/* [Hidden] */
sa = s/100;
ha = hollowArea/100;
slice = 200;
function r(p, deg) = [(cos(deg)*p[0]) + (-sin(deg)*p[1]),(sin(deg)*p[0]) + (cos(deg)*p[1])];
function sc(p, factor) = [p[0]*factor,p[1]*factor];

//generate outer side points here
outer = [ for(i = [1:sides]) sc(r([1,1],i * 360/sides), outerStarSize) ];

//generate inner side points here
inner = [ for(i = [1:sides]) sc(r([1,1],i * 360/sides + 180/sides), innerStarSize) ];

//generate points list
point = concat(outer,inner);

//Generate paths
path = [ for (i = [1:2*sides]) (i%2)==0 ? ceil(i/2) + sides -1 : ceil(i/2) -1 ];

//Generate the points for the inner star
point2 = [ for (i = [1:2*sides]) sc(point[i-1], ha) ];

point3 = [ for (i = [1:2*sides]) sc(point[i-1], (1-ha)/2 +ha ) ];

union(){
    linear_extrude(height = h, twist = t, scale = sa, slices = slice)
        difference(){
            polygon(points=point, paths=[path]);
            polygon(points=point2, paths = [path]);
        }

    linear_extrude(height = bottomHeight, twist = (bottomHeight/h) * t)
            polygon(points=point3, paths=[path]);
    }

```


[User]
Hey, I'm trying to design a magnetic bottle holder, kind of like those BottleLoft things but I want to make it myself and customize it. I've got some specific parameters in mind, and I need it to be parametric so I can adjust it later. I'll describe it below.

I want the base to be a grid of bottle-sized spaces. I need to be able to specify:

*   `Bottle_X`: How many bottles across each row
*   `Bottle_Y`: How many rows of bottles
*   `Bottle_Diameter`: The diameter of the bottle. I'm starting with 62mm which is roughly a 33cl beer bottle.
*   `Thinkness`: The thickness of the base plate. This should be fairly thin. Let's start with 2mm.
*   `Magnet_diameter`: The diameter of the magnets used, Let's say 20mm.

Each space should have:

*   A circular cutout for the bottom of the bottle. The diameter would be `Bottle_Diameter`.
*   A circular hole in the center for the magnet.
    * The hole should be a countersink with a slightly wider base and a hole for the magnet, the base diameter should be `Magnet_diameter` plus twice the plate `Thinkness`, and the magnet hole diameter should be just `Magnet_diameter`.
    * The depth of the countersink should be equal to the plate `Thinkness`. The magnet hole should be `Thinkness+1`.
* An optional screw hole offset from the center. This should be a simple through-hole cylinder with a diameter of 4mm. I need a `Screw` parameter to toggle this "yes" or "no". It should be positioned on the x axis by `(Bottle_Diameter/2)-Magnet_diameter+Thinkness*2`.
* Finally, I want a cylindrical peg in the center of the bottle cutout with a diameter equal to the plate `Thinkness` and a height of `Bottle_Diameter` that can be toggled on or off using a parameter named `Brian_revelation` that accepts a 0 or a 1.

I think that covers it. Could you generate the OpenSCAD code for this? I'm assuming it should use the built in modules of the language like `cube`, `cylinder`, `difference`, and `translate` and doesn't need any external libraries.

[Assistant]
bottlelift.scad:
```
//   Bottlelift by gaziel for pierrelesek, Alnoa
//modified for Brian

//   how many bottle in 1 line ?
Bottle_X=4;

//   how many line of beer ?
Bottle_Y=1;

//   caliper time !
Magnet_diameter=20;

//   62 for a standart 33cl beer bottle
Bottle_Diameter=62;

//no Fu$%ing low temp 3 m scotch .. no problem !
Screw="yes";//["yes","no"]

//   useless is the beterway, heuresement que j'ai pas arondis les coins comme un telephone de la pomme
Brian_revelation=1/1;//["amagod","xptdr"]

Thinkness=2;

module OneBelgianBeerPlease(){
    difference(){
        cube([Bottle_Diameter,Bottle_Diameter,Thinkness]);
            if (Screw=="yes"){
                translate([(Bottle_Diameter/2)-Magnet_diameter+Thinkness*2,Bottle_Diameter/2,0])cylinder(r=2,h=Thinkness);
            }
        }
        if (Brian_revelation==1){
            translate([Bottle_Diameter/2,Bottle_Diameter/2,Thinkness*1.5]) cylinder(d=Thinkness ,h=Bottle_Diameter);
        }
        translate([Bottle_Diameter/2,Bottle_Diameter/2,Thinkness*1.5]){
            difference(){
                cylinder(d1=Magnet_diameter+Thinkness*2,d2=Magnet_diameter+Thinkness,h=Thinkness,center=true);
                cylinder(d=Magnet_diameter,h=Thinkness+1,center=true);

            }
        }

}

for(j=[0,Bottle_Y-1]){
        for (i=[0:Bottle_X-1]){
            translate([i*Bottle_Diameter,j*Bottle_Diameter,0])OneBelgianBeerPlease();
        }
    }

```


[User]
Hey, I'm looking to design a dual-sided tablet stand for stop motion animation, and I'd love some help with the OpenSCAD code. I need it to hold a tablet on two different sides, with each side having a different angle and a different slot width.

One side should have a very shallow angle, something like 1 degree, meant for close-up camera shots with the camera at the bottom. The other side needs a steeper angle, maybe around 11 degrees, for medium-distance shots with the camera at the top.

I need to be able to specify the thickness of the tablet for each side separately. So, there should be a variable for each side's slot depth, with a bit of extra space for a buffer. Also, I want to be able to specify the main width of the stand, the thickness of the base, and the height of the front block on each side, which is what holds the tablet in place.

I'm thinking the overall design is kind of rectangular. One side will have the shallow-angle slot, then there's the base, and then the other side has the steeper-angle slot. It's okay if the base is a simple rectangular prism. I'd also like some small feet added to the bottom of the stand. Something simple like small cylinders will do.

Also, I saw a clever way to add some support for each angle with a web-like structure. I really liked the way the included design does this. I'd like something similar using a series of polygons generated using linear extrusion. That would be amazing if you can implement it.

I want to make this parametric so I can tweak it easily. Could you help me generate this? I really appreciate your assistance. I'm not attached to any particular library of modules, so just use whatever is best in your experience. I can't wait to see what you come up with.

[Assistant]
DualStopMotionTabletStandC.scad:
```
/* [Hidden] */
goldenratio = 1.61803399;
joinfactor = 0.125;

/* [Stand Side 1] */
// Angle of Repose (degrees)
gAngleOfRepose = 1;
// Thickness of tablet (include a buffer of ~0.3-0.6mm; wider angles require larger buffers)
gMaterialThickness = 6.4;

/* [Stand Side 2] */
// Angle of Repose (degrees)
g2AngleOfRepose = 11;
// Thickness of tablet (include a buffer of ~0.3-0.6mm; wider angles require larger buffers)
g2MaterialThickness = 6.6;

/* [Global Settings] */
// Thickness (mm) of the walls that hold the tablet
gWallThickness = 7;
// Width (mm) of the rectangular portion of the stand
gBaseWidth = 88.9;
// Thickness (mm) of the rectangular base
gBaseThickness = 8;
// Height (mm) of front block that holds tablet in place
gBaseFrontBlockHeight = 11;

union()
{
rotate([90, 0, 90])
    Bracket(gBaseFrontBlockHeight, gMaterialThickness, gAngleOfRepose, gBaseWidth);

//Calculate Offset to combine
combineOffset = 1.45*(gWallThickness*2+((gMaterialThickness+g2MaterialThickness)/2)+(gBaseFrontBlockHeight*goldenratio));

translate([gBaseWidth,combineOffset,0])
    rotate([90, 0, -90])
        Bracket(gBaseFrontBlockHeight, g2MaterialThickness, g2AngleOfRepose, gBaseWidth) ;
}

//================================
// Modules
//================================
module FillWeb(L11,L12,L21,L22, thickness, steps)
{
	width1 = L12[0]-L11[0];
	height1 = L12[1]-L11[1];
	echo("width1, height1", width1, height1);

	width2 = L22[0]-L21[0];
	height2 = L22[1]-L21[1];
	echo("width2, height2", width2, height2);

	dwidth1 = width1/steps;
	dwidth2= width2/steps;

	dheight1 = height1/steps;
	dheight2 = height2/steps;

	m1 = height1/width1;
	m2 = height2/width2;

	x1=0;
	y1=0;

	x2=0;
	y2=0;

	for (step=[0:steps-1])
	{
		linear_extrude(height = thickness, convexity = 10)
		polygon(
			points=[[ width1 - step*dwidth1, L12[1]-step*dheight1],
			[0,0],
			[ L21[0] + step*dwidth2, L21[1] + step*dheight2]],
			paths=[[0,1,2,0]]
		);
	}

}

module Bracket(frontBlock, gapsize, repose, width)
{
	backBlock = frontBlock * goldenratio;

	baselength = gWallThickness*2+gapsize+backBlock;

	webShortTopHeight = frontBlock * sin(90-repose);
	webShortTopLength = frontBlock * cos(90-repose);

	webTopHeight = backBlock * sin(90-repose);
	webTopLength = backBlock * cos(90-repose);

	webBottomLength = backBlock;
	webShortBottomLength = frontBlock;

	webOffset = [(baselength) -webBottomLength, gBaseThickness, 0];
	webShortOffset = [baselength -webBottomLength, gBaseThickness, -joinfactor];

	// Lay down the base
	cube(size=[baselength, gBaseThickness, width]);

	// Add supporting fillet
	translate(webOffset)
	color([0,1,1]) FillWeb([0,0],[webTopLength,webTopHeight], [0,0], [webBottomLength,0], width, 12);

	// Front block
	translate([0, gBaseThickness-joinfactor, 0])
	rotate([0, 0, -repose])
	cube(size=[gWallThickness, frontBlock, width]);

	// Back block
	translate([gWallThickness+gapsize,  gBaseThickness-joinfactor, 0])
	rotate([0, 0, -repose])
	cube(size=[gWallThickness, backBlock, width]);

    //Feet
    scale([1.45,1,1])
        translate([4,0,15])
            rotate([0, -90, -90])
                cylinder (5,17,17,0);

    scale([1.45,1,1])
        translate([4,0,(gBaseWidth-15)])
            rotate([0, -90, -90])
                cylinder (5,17,17,0);

}
```


[User]
I need a parametric OpenSCAD file for a hole reducer. The basic shape should be a cylinder that tapers slightly outwards. Think of it like a very short, wide frustum. I want to be able to define the outer diameter at the base, the outer diameter at the top, the inner diameter (which is constant through the whole piece), and the height. I'd also like to be able to specify the number of facets to use for the cylinders.

The purpose of this is to reduce the size of an existing hole in a piece of furniture, so the final piece needs to fit snugly.

I'm not using any external libraries yet, but if there's one that would make this easier, feel free to suggest it.

[Assistant]
hole_reducer.scad:
```
outerDiammeter=68;
innerDiammeter=61;
conicVariation=3;
height=20;
difference ()
  {

		cylinder (d1=outerDiammeter,d2=outerDiammeter-conicVariation, h=height, $fn=200);
		cylinder (d=innerDiammeter, h=25, $fn=200);

  }
```


[User]
I'd like to design a parametric net pot for hydroponics, something that can be adjusted for different sizes. I have some ideas about the structure but I'm not sure how to best implement them in OpenSCAD.

Here's what I'm thinking:

*   **Overall Shape:** It should be a frustum, a cone with the top and bottom cut off, with a larger diameter at the top and a smaller one at the bottom.
*   **Dimensions:** I need to be able to control the top diameter, bottom diameter, and overall height.
*   **Overhang:** I want a small overhang at the top edge. This should be adjustable in terms of its extent (how far it sticks out), its height, and the angle of the overhang.
*   **Thickness:** I need to control the thickness of the bottom and the walls.
*   **Holes:** I want to include holes in the bottom and sides for water circulation.
    *   **Bottom Holes:** These should be arranged in concentric rings, with adjustable diameters and segment counts for each ring. I want to use 'pie' style segments where segments are connected by thin struts/connections.
    *  **Wall Holes**: These should also be pie segments. I want a few different sections on the wall at different heights. Each section should be adjustable in terms of its height range and the number of segments.
*   **Connections:** The connections that form the pie segments should have an adjustable width.

I'm imagining a design with all these parameters, so I can customize the net pot easily for various projects. I'd like to have an OpenSCAD file that contains these parameters as variables and allows me to modify the design by just changing the parameters at the top.

I'm hoping you could generate that for me?

[Assistant]
parametric-net-pot.scad:
```

diameter_top=75;
diameter_bottom=55;

height=60;

overhang_extent=2;
overhang_height=1;
overhang_angle=55;

thickness_bottom=1.2;
thickness_walls=1.5;

width_connections=3;

pie_segments_1=8;
pie_segments_2=16;
pie_segments_3=24;

pie_segments_wall=24;

// Hidden variables:

eps=0.03*1;

$fn=100*1;

// HELPERS
module cyl_sect(r1, r2, h) {
    difference() {
        cylinder(r=r1, h=h);
        translate([0,0,-eps])
            cylinder(r=r2, h=h+2*eps);
    }
}
module connect(r, w, h, phi) {
    rotate(phi, [0,0,1])
        translate([0,-w/2,0])
            cube([r,w,h]);
}

// OBJECT PARTS
module positive() {
    cylinder(r1=diameter_bottom/2, r2=diameter_top/2, h=height);

    // Overhang
    translate([0,0,height-overhang_height]) {
        cylinder(r=diameter_top/2+overhang_extent, h=overhang_height);
        // printing aid (overhang_angle degrees of overhang are assumed to be printable)
        mirror([0,0,1]) {
            intersection() {
                cylinder(r2=0, r1=diameter_top/2+overhang_extent,
                         h=(diameter_top/2+overhang_extent)/tan(overhang_angle));
                cylinder(r=diameter_top/2+overhang_extent, h=height-overhang_height);
            }
        }
    }
}

module negative() {
    module make_bottom_holes(begin,end,pie_segments) {
        translate([0,0,-eps])
        difference() {
            cyl_sect(r1=end*diameter_bottom, r2=begin*diameter_bottom, h=thickness_bottom+2*eps);
            for (i=[0:pie_segments]) {
                connect(r=diameter_bottom,
                        w=width_connections,
                        h=thickness_bottom+2*eps,
                        phi=i*360/pie_segments);
            }
        }
    }
    module make_wall_holes(begin,end,pie_segments) {
        translate([0,0,begin*height])
        difference() {
            cylinder(r=diameter_bottom+diameter_top, h=(end-begin)*height);
            for (i=[0:pie_segments]) {
                connect(r=diameter_bottom+diameter_top,
                        w=width_connections,
                        h=(end-begin)*height,
                        phi=i*360/pie_segments);
            }
        }
    }

    union() {
        // inside
        difference() {
            cylinder(r1=diameter_bottom/2-thickness_walls, r2=diameter_top/2-thickness_walls, h=height+eps);
            cylinder(r=diameter_top+diameter_bottom, h=thickness_bottom);
        }

        // holes on wall
        union() {
            make_wall_holes(.05, .25, pie_segments_wall);
            make_wall_holes(.30, .50, pie_segments_wall);
            make_wall_holes(.55, .75, pie_segments_wall);
        }

        // holes on bottom
        union() {
            make_bottom_holes(.08, .18, pie_segments_1);
            make_bottom_holes(.22, .32, pie_segments_2);
            make_bottom_holes(.36, .46, pie_segments_3);
        }
    }
}

// MAIN
difference() {
    positive();
    negative();
}

```


[User]
I'm looking to design an omni wheel, and I want to make it parametric in OpenSCAD. I've got a rough idea and some dimensions, but I need help putting it all together. I want the design to be based on a combination of a few existing ideas, which I can describe.

Essentially, the wheel should have a central hub made of two halves, which connect using a central hole. The hub will have slots cut out along its circumference where the "spinners" will be. These spinners are essentially small wheels, each with an o-ring around them for traction. I want the spinners to be held in place, on a circular track of sorts. That circular track will be formed by a "split ring", which sits in a groove within each hub half. I want to be able to adjust the split ring size, o-ring size, spinner count and more, so parameters would be ideal.

More specifically, the hub is created by two halves which are mirror images of each other along their shared center plane, which is oriented parallel to the rotation axis of the main wheel. The hub's halves need a central hole, plus some optional additional holes on the sides. These side holes can also be parameterized by number, distance from center, and diameter. Each half should also have a groove cut into it which will hold the split ring. The groove should have a flat portion and then a taper to secure the split ring more tightly, and I want a parameter to control the relative length of the flat portion vs. the tapered portion.

Each spinner is basically a cylindrical disk with a through-hole. This spinner has an o-ring wrapped around its outer edge, providing traction. I'll need the inner and outer diameter of the o-ring to be parameterized. The spinner's central hole should fit on the split ring, but with a bit of extra space around it. I'd also like to be able to define a margin of extra depth and width for the hub slots, to make sure there's enough clearance for the spinners.

For reference, the split ring I'm using has an inner diameter of 32.5mm, an outer diameter of 38mm, and a height/thickness of 3.3mm. The O-rings I'm planning on using have an inner diameter of 8mm and an outer diameter of 13mm. The hub's central hole should be 3mm. I'd like to start with 4 side holes spaced evenly around the center, 6mm away from the center, each 3mm in diameter. I want to begin with 10 spinners.

I'm not too worried about rendering time, but would like to see a preview of the whole wheel, plus each of the components individually.

It would be great if you could generate the required .scad files and include comments as well. I don't have any existing libraries I'm using right now, so if you're relying on them, please let me know which ones so I can install them.

[Assistant]
omniwheels.scad:
```
/* [Global] */

// Which part would you like to see?
part = "everything"; // [spinner:Spinner,halfhub:Half-hub,hub:Full hub (not recommended),everything:Everything together (for preview only)]

/* [Hidden] */

// Render O-ring and split ring as transparent overlays?
show_extras = 1; // [1:Yes,0:No]

/* [Hub] */

// Inner diameter of the split ring (mm) (32.5 for a 1.5" split ring)
splitring_id = 32.5; //

// Outer diameter of the split ring (mm) (38 for a 1.5" split ring)
splitring_od = 38; //

// Height/thickness of the split ring (mm) (3.3 for a 1.5" split ring)
splitring_height = 3.3;

// Diameter of the center hole (mm)
hub_center_hole_od = 3; //

// Number of additional holes in the hub:
hub_side_holes_count = 4; // [0:16]

// Distance from the center for the additional holes (mm)
hub_side_holes_dist = 6; //

// Diameter of the additional holes (mm)
hub_side_holes_dia = 3;  //

// What fraction of the hub is the inner flat part vs. the tapered? Setting to 0 means very tight fit, setting to 100 means very loose fit (no taper at all!)
hub_flat_percentage = 50; // [0:100]
hub_flat_ratio = hub_flat_percentage/100;

/* [Spinners] */

// Number of spinners
num_spinners = 10; // [0:32]

// Inner diameter of the rubber O-ring (mm)
oring_id = 8; //

// Outer diameter of the rubber O-ring (mm)
oring_od = 13; //

// Excess margin beyond the split ring to widen the spinner's hole (mm)
spinner_hole_margin = 0.5;

// How much wider should the hub slots be than the spinners? 0.2 means 20% wider. Wider means reduced chance of friction, but reduced strength, and the possibility of the spinners rocking laterally.
spinner_margin_theta = 0.2;

// How much deeper should the hub slots be than the spinners? 0.3 means 30% deeper. Deeper means reduced chance of friction, but reduced strength.
spinner_margin_r = 0.3;

splitring_cd = (splitring_od+splitring_id)/2;
splitring_width = (splitring_od-splitring_id)/2;
oring_cd = (oring_od+oring_id)/2;
oring_width = (oring_od-oring_id)/2;

if (part == "spinner") {
    $fn=40;
    spinner();
} else if (part == "halfhub") {
    $fn=30;
    rotate([180,0,0]) halfhub();
} else if (part == "hub") {
    $fn=30;
    hub();
} else if (part == "everything") {
    $fn=15;
    hub();
    multi_spinners();
}

module halfpiece(d1,d2,h,hole_od) {
    difference() {
        cylinder(d1=d1, d2=d2, h=h/2);
        translate([0,0,-1]) cylinder(h=h+1, d=hole_od);
    }
}
module piece(d1,d2,h,hole_od) {
    halfpiece(d1,d2,h,hole_od);
    scale([1,1,-1]) halfpiece(d1,d2,h,hole_od);
}

module spinner() {
    piece(oring_id,oring_cd,oring_width,max(splitring_height,splitring_width)+spinner_hole_margin*2);
    if (show_extras) %oring();
}

module oring() {
    rotate_extrude(convexity=10) translate([oring_cd/2,0,0]) circle(d=oring_width);
}

module splitring() {
    //rotate_extrude(convexity=10) translate([splitring_cd/2,0,0]) circle(d=splitring_width);
    rotate_extrude(convexity=10) translate([splitring_cd/2,0,0])
        polygon([
            [-splitring_width/2,0],
            [0, +splitring_height/2],
            [+splitring_width/2,0],
            [0, -splitring_height/2]
        ]);
}

module spinner_with_oring(dx=0,dy=0) {
    oring();
    translate([0,0,-oring_width/2]) cylinder(d=oring_cd, h=oring_width);

}

module at_spinnerpoints() {
    for (i = [0:num_spinners-1]) {
        rz = i/num_spinners*360;
        rotate([0,0,rz]) translate([splitring_cd/2,0,0]) rotate([90,0,0]) children();
    }
}

module multi_spinners() {
    at_spinnerpoints() spinner();
}

module halfhub() {
    difference() {
        union() {
            //cylinder($fn=$fn*2, d1=splitring_id, d2=splitring_cd, h=splitring_height/2);
            halfhub_flat_height = splitring_height/2 * hub_flat_ratio;
            halfhub_angle_height = splitring_height/2 * (1-hub_flat_ratio);
            cylinder($fn=$fn*2, d=splitring_id, h=halfhub_flat_height);
            translate([0,0,halfhub_flat_height])
                cylinder($fn=$fn*2, d1=splitring_id, d2=splitring_cd, h=halfhub_angle_height);
        }
        translate([0,0,-1]) cylinder(h=splitring_height+1, d=hub_center_hole_od);
        at_spinnerpoints()
            scale([1+spinner_margin_r,1+spinner_margin_r,1+spinner_margin_theta]) spinner_with_oring();
        for (i = [0:hub_side_holes_count-1]) {
            rz = i/hub_side_holes_count*360;
            rotate([0,0,rz]) translate([hub_side_holes_dist,0,-1]) cylinder(h=splitring_height+1, d=hub_side_holes_dia);
        }
    }
}

module hub() {
    halfhub();
    scale([1,1,-1]) halfhub();
    if (show_extras) %splitring();
}
//hub();
//multi_spinners();
//spinner_with_oring();
```