[User]
Okay, so I'm looking to create a parametric OpenSCAD design for a snowman candle mold. I want it to be fairly detailed, and I'm thinking about how to make it easy to cast the candle. I'd like the core of the design to be similar to the existing `Snowman.scad` file, but I'd like to ask for a new design so it's all built together in one logical set of files. I want the mold to have a few key features:

1.  **Parametric Size & Proportions:**  I need to be able to adjust the overall height, as well as the relative sizes of the head, torso, and base, just like in the provided file with `top`, `mid`, `bot` parameters. I would like to be able to adjust the flat spot at the bottom (`flat` parameter) and the overlap between the different sections of the snowman (`overlap` parameter).
2.  **Pour Spout:**  The mold needs a pour spout with an adjustable size for both the top opening (the `pourOpen` parameter) and the bottom width (the `pour` parameter). The depth of the pour spout should also be adjustable.
3.  **Mold Cavity & Shell:**  The mold should have a customizable shell thickness (similar to the existing `shell` parameter) and a separate outer jacket for cooling (similar to the existing `jacket` parameter) and to ensure a good thick wall.
4.  **Support Rods:**  I'd like to have parametric support rods within the jacket to help keep the mold rigid during casting. I should be able to control the rod diameter (`rodD`) and spacing (`rodS`).
5.  **Bolt Holes:**  The mold should include bolt holes for joining mold halves. I'd like to be able to specify the bolt hole diameter (`boltD`) and the inset from the edge (`boltI`), including a hexagonal inset for bolt heads. I need to adjust the depth (`hexDepth`) and size (`hexSize`) of the hexagonal inset.
6.  **Corner Rounding:** I need nice rounded corners on the mold using a similar approach to `edgeCutter` in the existing file, with a customizable radius (`cornerR`).
7.  **Foot Spheres:** I'd like to have spheres on the base to provide better grip/stability similar to the `feet()` module of the existing file, with adjustable radius and offset using parameters like `footR` and `footH`.
8.  **Wick Holder:** I'm thinking of embedding a wick holder directly into the mold. I need a module for this, similar to the `wickHolderHolder` in the existing file, with adjustable gap, overlap and radius (parameters like `whhR`, `whhG`, `whhO`, `whhT`).
9. **Dimples and Maker's Mark:** I'd like some dimples on the snowman's face and body (similar to the existing file) and some text engraved on the bottom of the snowman using `text_on_sphere` module of `text_on.scad` library.
10. **Mold Piece Selection:** I'd like to be able to specify which quarter of the mold is rendered, just like in the existing file, using a `piece` parameter.
11. **Mold Slicing:** I need to be able to specify the wall thickness of the slicing for mold halves using a parameter similar to `moldS`.
12. **Fast Render Option:**  Like the original code, I need a way to generate the mold much faster, especially when testing parameters, with `$fn` set to a lower value.

I think that covers most of it.  I want a clean, parametric design using these specific parameters, and I'm imagining a few files: one for defining the core snowman shape with parametric spheres, another for the mold cavity/shell/jacket, a third for all of the support features (rods, bolt holes, etc), and a fourth to pull them all together to allow for slicing and rendering. Also, be sure to use the `text_on.scad` library.

[Assistant]
Snowman.scad:
```
use <text_on.scad>
// preview[view:west]

// Make a mold or a solid snowman
mold      = 0; // [0:Snowman,1:Mold]

// Rendering speed, smooth may take hours for the mold.
fast      = 0; // [0:Smooth,1:Fast]

// Which piece of the mold will be rendered
piece     = 0; // [0,90,180,270]

// Relative size of snowman head
top       = 1.0; // [0.1:0.01:10.0]

// Relative size of snowman torso
mid       = 1.5; // [0.1:0.01:10.0]

// Relative size of snowman bottom
bot       = 2.1; // [0.1:0.01:10.0]

// Relative size of snowman flat spot
flat      = 0.5; // [0.0:0.01:10.0]

// Degree to which segments overlap 0 = none
overlap   = 0.25; // [0.0:0.01:1.0]

// Relative size of pour funnel hole
pour      = 0.33; // [0.1:0.01:10.0]

// Actual size of pour funnel opening (mm)
pourOpen  = 25.4;

// Desired final height of snowman (mm)
height    = 151.6;

// Radius of dimple features (mm)
dimpleRad = 0.75;

dimpleRot = 1*45.0;

// Label that goes on the back/bottom
makerMark = "mangocats.com";

makerFont = 5.8;
scHt      = top + bot - flat + (bot+2*mid+top) * ( 1-overlap ); // Scale height
scFact    = height/scHt;  // Scale factor to make actual height
extra     = 1*0.1;   // Arbitrary extension to prevent minimal fragments
shell     = 1*2.0;   // Shell thickness
jacket    = 1*10.0;  // Water jacket thickness
rodD      = 1*3.0;   // Support rod diameter
rodS      = 1*9.0;   // Support rod spacing
boltD     = 1*7.0;   // Hole for 1/4-20 hardware
boltI     = 1*8.0;   // Inset for hardware holes from edges
hexDepth  = 1*5.0;   // Inset of hex head holder
hexSize   = 1*6.25;  // a little oversized for 7/16", a snug fit when printed
wall      = 1*2.0;   // Minimum mold wall thickness
moldW     = boltD/2+wall*2;    // Mold outer wall minimum thickness
below     = jacket+wall+shell; // Material below the XY plane (and above "height")
moldS     = wall*2;                         // Mold slicing wall thickness
blockR    = bot*scFact+jacket+moldW;        // "radius" of the block
blockH    = height + below + jacket + wall; // height of the block
throat    = top*scFact+below+extra;         // pour throat length
cornerR   = 1*6.0;                          // Radius of corner rounding circle
cornerI   = cornerR*0.707+1.0;              // Inset of corner rounding circle
footR     = 1*15.0;                         // Radius of the foot sphere
footH     = footR*0.29289;                  // How far foot extends beyond face, 45 degree max print overhang
whhR      = 1*11.5;                         // Wick Holder Holder gap radius
whhG      = 1*0.9;                          // Wick Holder Holder gap thickness
whhO      = 1*3.0;                          // Wick Holder Holder overlap radius
whhT      = 1*0.6;                          // Wick Holder Holder overlap thickness

$fn=(fast > 0.5) ? 16 : 149;

if ( mold > 0.5 )
  { quarterBlock(piece);
  }
if ( mold <= 0.5 )
 { snowman();
 }

module quarterBlock( rot=0.0 )
{ difference()
    { translate( [0,0,blockR/2] )
        rotate( [0,90,0] )
          translate( [-blockR/2,-blockR/2,below-blockH/2] )
            rotate( -rot )
              intersection()
                { blockWithCavities();
                  rotate( rot )
                     translate( [0,0,-below-footH-extra] )
                      linear_extrude( blockH+2*(footH+extra) )
                        square( blockR+extra );
                }
       quarterCuts();
    }
}

module blockWithCavities()
{ difference()
    { union()
        { difference()
            { block();
              snowmanJacket();
              snowman();
              waterHole();
            }
          moldWalls();
          pourSleeve();
          rods();
          feet();
          if ( piece==0 )
            wickHolderHolder();
        }
      boltHoles();
      snowmanPour();
    }
}

module moldWalls()
{ difference()
    { translate( [0,0,-below] )
        { linear_extrude( blockH )
            square( [blockR*2, moldS], center=true );

          linear_extrude( blockH )
            square( [moldS, blockR*2], center=true );
        }
      snowman();
      snowmanPour();
    }
}

module block()
{ difference()
    { translate( [0,0,-below] )
        linear_extrude( blockH )
          square( blockR*2, center=true );
      edgeCuts();
    }
}

module wickHolderHolder()
{ translate( [0,0,-extra] )
    difference()
      { linear_extrude( whhG + whhT + extra, scale = 0.66666666666667 )
          circle( (whhR + whhO) * 1.5 );
        linear_extrude( whhG + extra )
          circle( whhR + whhO );
        linear_extrude( whhG + whhT + extra * 2 )
          circle( whhR );
      }
}

module quarterCuts()
{ translate( [ blockH/2+extra/2,-blockR/2,0] )
    rotate( [0,90,180] )
      translate( [0,0,below+extra/2] )
        edgeCutter();

  translate( [-blockH/2-extra/2, blockR/2,blockR] )
    rotate( [180,90,180] )
      translate( [0,0,below+extra/2] )
        rotate( [0,0,90] )
          edgeCutter();

  translate( [ blockH/2, blockR/2,0] )
    shortEdgeCutter();
  translate( [-blockH/2, blockR/2,0] )
    rotate( 90 )
      shortEdgeCutter();
  translate( [-blockH/2,-blockR/2,0] )
    rotate( 180 )
      shortEdgeCutter();
  translate( [ blockH/2,-blockR/2,0] )
    rotate( 270 )
      shortEdgeCutter();

  translate( [ blockH/2,0,0] )
    shortEndCutter();
  translate( [-blockH/2,0,0] )
    rotate( [0,90,0] )
      shortEndCutter();
  translate( [-blockH/2,0,blockR] )
    rotate( [0,180,0] )
      shortEndCutter();
  translate( [ blockH/2,0,blockR] )
    rotate( [0,270,0] )
      shortEndCutter();

}

module edgeCuts()
{ translate( [-blockR,-blockR,0] )
    rotate( 180 )
      edgeCutter();

  translate( [ blockR, blockR,0] )
    edgeCutter();

  translate( [-blockR, blockR,0] )
    rotate( 90 )
      edgeCutter();

  translate( [ blockR,-blockR,0] )
    rotate( 270 )
      edgeCutter();
}

module shortEndCutter()
{ rotate( [270,0,0] )
    translate( [0,0,-blockR] )
      shortEdgeCutter();
}

module shortEdgeCutter()
{ intersection()
    { edgeCutter();
      translate( [0,0,-below-extra] )
        linear_extrude( blockH+extra*2 )
          square( cornerR*0.83, center=true );
    }
}

module edgeCutter()
{ translate( [0,0,-below-extra/2] )
    linear_extrude( blockH+extra )
      translate( [-cornerI,-cornerI] )
        difference()
          { square( cornerR );
            circle( cornerR );
          }
}

module boltHoles()
{ boltHoleSet();
  rotate( 90 )
    translate( [0,0,-boltD-wall] )
      boltHoleSet();
}

module boltHoleSet()
{ boltHolePair();
  translate( [0,0,height] )
    boltHolePair();
}

module boltHolePair()
{ translate( [boltI-blockR,blockR+extra/2,boltI-jacket/2] )
    boltHole( flip=1 );
  translate( [blockR-boltI,blockR+extra/2,boltI-jacket/2] )
    boltHole( flip=0 );
}

module boltHole( flip=0 )
{ rotate( [90,0,0] )
    union()
      { linear_extrude( blockR*2+extra )
          circle(boltD/2);
        translate( [0,0,(flip > 0.5) ? blockR*2+extra:0] )
          Hexagon( h=hexDepth, A=hexSize );
      }
}

module rods()
{ intersection()
    { rodMask();
      rodSets();
    }
}

module rodSets()
{ rodSet();
  rotate( 90 )
    { rodSet();
      rotate( 90 )
        { rodSet();
          rotate( 90 )
            rodSet();
        }
    }
}
module rodSet()
{ extraGap = ( fast > 0.5 ) ? rodS*2 : 0;

  for ( x = [wall+rodD:rodS+extraGap:blockR] )
    for ( z = [wall+rodD-jacket:rodS*2*sin(60)+extraGap:height+jacket] )
      translate( [x,0,z] )
        rod();
  for ( x = [wall+rodD+rodS*0.5:rodS+extraGap:blockR] )
    for ( z = [wall+rodD-jacket+rodS*sin(60):rodS*2*sin(60)+extraGap:height+jacket] )
      translate( [x,0,z] )
        rod();
}

module rod()
{ $fn=16;
  rotate( [90,0,0] )
    linear_extrude( blockR )
      circle(rodD/2);
}

module rodMask()
{ difference()
    { snowman( (jacket+extra)/scFact );
      snowman( (shell-extra)/scFact );
    }
}

module snowmanJacket()
{ difference()
    { snowman( jacket/scFact );
      snowman( shell/scFact );
    }
}

module snowmanShell()
{ difference()
    { snowman( shell/scFact );

      snowman();
    }
}

module feet()
{ translate( [ 0,0,-below ] )
    footSet();
  translate( [ 0,0,blockH-below ] )
    rotate( [180,0,0] )
      footSet();
}

module footSet()
{ footI = footR * 0.8;
  translate( [ blockR-footI, blockR-footI,0] )
    foot();
  translate( [-blockR+footI, blockR-footI,0] )
    foot();
  translate( [-blockR+footI,-blockR+footI,0] )
    foot();
  translate( [ blockR-footI,-blockR+footI,0] )
    foot();
  translate( [ footI, blockR/2,0 ] )
    foot();
  translate( [-footI, blockR/2,0 ] )
    foot();
  translate( [ footI,-blockR/2,0 ] )
    foot();
  translate( [-footI,-blockR/2,0 ] )
    foot();
  translate( [ blockR/2, footI,0 ] )
    foot();
  translate( [ blockR/2,-footI,0 ] )
    foot();
  translate( [-blockR/2, footI,0 ] )
    foot();
  translate( [-blockR/2,-footI,0 ] )
    foot();
}

module foot()
{ translate( [0,0,extra] )
    difference()
      { translate( [0,0,footR-footH-extra] )
          sphere( footR );
        linear_extrude( footR*2 )
          square( (footR+extra)*2, center=true );
      }

}

module waterHole()
{ translate( [0,0,-below-extra] )
    linear_extrude( jacket/2 )
      circle(wall+pourOpen/2);
}

module pourSleeve()
{ difference()
    { union()
        { translate( [0,0,blockH-below-throat] )
            linear_extrude( throat )
              circle(pour*scFact+wall);
          translate( [0,0,blockH-below+extra] )
            rotate( [180,0,0] )
              linear_extrude( pourOpen/2+wall*1.414,scale=0.0 )
                circle(pourOpen/2+wall*1.414);
        }
      snowman();
      snowmanPour();
    }
}

module snowmanPour()
{ translate( [0,0,blockH-below-throat] )
    linear_extrude( throat )
      circle(pour*scFact);

  translate( [0,0,blockH-below+extra] )
    rotate( [180,0,0] )
      linear_extrude( pourOpen/2,scale=0.0 )
        circle(pourOpen/2);
}

module snowman( puff=0.0 )
{ scale( scFact )
    difference()
      { translate ( [0,0,bot-flat] )
          { difference()
              { sphere( bot + puff );
                if ( puff==0.0 )
                  { bottomDimples();
                    # rotate( [0,90,dimpleRot] )
                      text_on_sphere( makerMark, r=bot, size=makerFont/scFact, extrusion_height=1/scFact, spacing=1.02, center=true, rounded=true, font="Liberation Bold" );
                  }
              }
            translate ( [0,0,(bot+mid) * (1-overlap) ] )
              { difference()
                  { sphere( mid + puff );
                    if ( puff==0.0 )
                      torsoDimples();
                  }
                translate ( [0,0,(mid+top) * (1-overlap) ] )
                  difference()
                    { sphere( top + puff );
                      if ( puff==0.0 )
                        faceDimples();
                    }
              }
          }
        translate( [0,0,-flat-puff-extra] )
          linear_extrude( flat+extra )
            circle( bot + puff );
      }
}

module bottomDimples()
{ rotate( dimpleRot )
  union()
    { rotate( [ 45,0,0] )
        dimple(bot);
    }
}

module torsoDimples()
{ rotate( dimpleRot )
  union()
    { dimple(mid);

      rotate( [ 20,0,0] )
        dimple(mid);

      rotate( [-20,0,0] )
        dimple(mid);
    }
}

module faceDimples()
{ rotate( dimpleRot )
  union()
    { dimple(top); // Nose

      rotate( [20,0,15] ) // Left Eye
        dimple(top);

      rotate( [20,0,-15] ) // Right Eye
        dimple(top);

      rotate( [-21,0,0] ) // Mouth
        dimple(top);

      rotate( [-19.5,0, 9.7] )
        dimple(top);

      rotate( [-19.5,0,-9.7] )
        dimple(top);

      rotate( [-15,0, 18] )
        dimple(top);

      rotate( [-15,0,-18] )
        dimple(top);
    }
}

module dimple( part=1.0 )
{ $fn=16;
  sdr = dimpleRad/scFact;
  translate( [0,part,0] )
    sphere( sdr );
}

//============================================================
// OpenSCAD
// Regular Convex Polygon Library
// Last Modified : 2015/10/28
//============================================================
/*

	Definition

	N = Number of Side N >=3
	A = apothem
		radius of inside circle
	R = circumradius
		Radius of outside circle
	S = Side
		Lenght of a side

	Build polygon with the Apothem :
	N and A is known
	Need to calculate S then R
	use $fn

	Build Polygon with Circumradius
	N and R known
	use $fn

	Build Polygon with Side
	N and S Known
	Need to calculate R and optionaly A
	use $fn

	TO DO
    Control result

	For more information :
	http://en.wikipedia.org/wiki/Regular_polygon

*/

//------------------------------------------------------------
// Polygon :
//------------------------------------------------------------
module Polygon(N=3,A=0,R=0,S=0,h=0,debug=false)
{
	N = ( N < 3 ? 3 : N );

	angle = 360/N;
	angleA = angle/2;

	if (debug)
	{
		echo("N = ", N);
		echo("A = ", A);
		echo("S = ", S);
		echo("R = ", R);
	}

	if ( A > 0 )		// if A assign R and S
	{
        S = 2 * A * tan(angleA);							// assign
		//R = (S/2) / sin(angleA);						// no assign ???
		R = ( A * tan(angleA) ) / sin(angleA);		// asign
		_Build_Polygon(N=N,R=R,h=h);
		if (debug)
		{
			echo("aN = ", N);
			echo("aA = ", A);
			echo("aS = ", S);
			echo("aR = ", R);
			#cylinder(r=A,h=h+1,center=true,$fn=150);
			%cylinder(r=R,h=h+1,center=true,$fn=150);
		}
	}
	else
	{
		if ( S > 0 )		// if S assign R and A
		{
			R = (S/2) / sin(angleA);			// assign
			A = S / ( 2 * tan(angleA) );		// assign
            _Build_Polygon(N=N,R=R,h=h);
			if (debug)
			{
				echo("sN = ", N);
				echo("sA = ", A);
				echo("sS = ", S);
				echo("sR = ", R);
				#cylinder(r=A,h=h+1,center=true,$fn=150);
				%cylinder(r=R,h=h+1,center=true,$fn=150);
			}
		}
		else
		{
			if ( R == 0 )		// default
			{
				S = 2 * R * sin(angleA);			// no assign ???
				A = S / ( 2 * tan(angleA) );		// no assign ???
				_Build_Polygon(N=N,h=h);
				if (debug)
				{
					echo("0N = ", N);
					echo("0A = ", A);
					echo("0S = ", S);
					echo("0R = ", R);
					#cylinder(r=A,h=h+1,center=true,$fn=150);
					%cylinder(r=R,h=h+1,center=true,$fn=150);
				}
			}
			else		// build with R
			{
				S = 2 * R * sin(angleA);
				A = S / ( 2 * tan(angleA) );			// no assign ???
				//A = R * ( sin(angleA) / tan(angleA) )	// no assign ???
				_Build_Polygon(N=N,R=R,h=h);
				if (debug)
				{
					echo("rN = ", N);
					echo("rA = ", A);
					echo("rS = ", S);
					echo("rR = ", R);
					%cylinder(r=R,h=h+1,center=true,$fn=150);
				}
			}
		}
	}

	if (debug)
	{
		echo("fN = ", N);
		echo("fA = ", A);
		echo("fS = ", S);
		echo("fR = ", R);
	}
}

//------------------------------------------------------------
// Build
//------------------------------------------------------------
module _Build_Polygon(N=3,R=1,h=0)
{
	if (h > 0)
	{
		// 3D primitive h>0
		cylinder(r=R,h=h,$fn=N,center=true);
	}
	else
	{
		// 2D primitive h=0
		circle(r=R,$fn=N,center=true);
	}
}

// 6 sides
module Hexagon(A=0,R=0,S=0,h=0,debug=false)
	{Polygon(N=6,A=A,R=R,S=S,h=h,debug=debug);}

```


[User]
Hey, I'm looking to create some parametric gift tags, similar to the ones I saw online but with a bit more control. I like the basic shape of a rectangle with the corners clipped off, plus a little hole for a string, and some extruded text on top.

Here's what I'd like to be able to customize:

*   **Tag Dimensions:** I need parameters for the overall width and height of the tag.
*   **Corner Clipping:** The current design has corners cut off at a 45 degree angle with a certain length to them. I want this to be controlled by the *tag height.* I'd like for this to be such that the corners cut are always the same distance from the tag's horizontal center line.
*   **Hole Position:** The circular hole should be parametric in radius and centered along the vertical center line of the tag, though I'd also like to be able to move it along that line. Also, I think it would be nice if the cut was a cylinder.
*   **Text:** The text itself should be a parameter, along with the font, font size, and the text's vertical and horizontal positioning on the tag face, as well as a text_depth parameter.
*   **Overall depth:** I want to control the base depth of the tag.

I think I'd like to generate these as a single .scad file. I'd like to be able to use the "Yesteryear" font, but I need to be able to change to other Google fonts, and I want to use the Google Font Library, if that makes sense. So, can you generate that for me? Thanks!

[Assistant]
gift_tag_customizer_remix.scad:
```
//Personalized and Parameterized Gift Tags
//By Brad Wagner (c) 2012
//Creative Commons License, yada yada.

//I made these for my new printer for Christmas giving/showing off. Damn I'm good. :P

//Print these with a 2 solid layers top and bottom and one perimeter for best results.

/*[Text]*/
tag_name="Ruby";

tag_width = 55; //[25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100,105,110,115,120,125,130,135,140,145,150,155,160,165,170]

tag_height = 30; //[5,10,15,20,25,30,35,40,45,50]

text_centering_height = 10;

text_centering_left_to_right = 15;

What_font="Yesteryear"; //[Abril Fatface,Aclonica,Acme,Advent Pro,Akronim,Aladin,Alegreya,Alegreya Sans,Alegreya SC,Alex Brush,Alfa Slab One,Alice,Amaranth,Architects Daughter,Archivo Black,Archivo Narrow,Arimo,Arvo,Asap,Astloch,Asul,Averia Libre,Averia Serif Libre,Bangers,Basic,Belgrano,Berkshire Swash,Bigshot One,Bilbo Swash Caps,Black Ops One,Bonbon,Bowlby One SC,Brawler,Bubblegum Sans,Butterfly Kids,Cabin Condensed,Caesar Dressing,Cagliostro,Calligraffitti,Capriola,Carter One,Changa One,Chango,Chelsea Market,Cherry Cream Soda,Chewy,Chicle,Chivo,Clicker Script,Coming Soon,Concert One,Condiment,Cookie,Courgette,Covered By Your Grace,Crimson Text,Dancing Script,DejaVu Sans,DejaVu Serif,Dhurjati,Doppio One,Dosis,Droid Sans,Eagle Lake,Electrolize,Emilys Candy,Encode Sans,Encode Sans Compressed,Euphoria Script,Exo,Exo 2,Faster One,Federo,Finger Paint,Fjord One,Fontdiner Swanky,Freckle Face,Fruktur,Gabriela,Geo,Germania One,Give You Glory,Gloria Hallelujah,Goudy Bookletter 1911,Graduate,Grand Hotel,Great Vibes,Griffy,Hanalei Fill,Happy Monkey,Henny Penny,Hind,IM Fell English SC,Indie Flower,Irish Grover,Italianno,Jacques Francois Shadow,Jolly Lodger,Josefin Slab,Joti One,Judson,Just Another Hand,Kalam,Kameron,Karma,Kavoon,Knewave,Kranky,Kristi,Laila,Lakki Reddy,Lancelot,Lato,Leckerli One,Ledger,Lekton,Lemon One,Liberation Sans,Libre Caslon Text,Life Savers,Lilita One,Lily Script One,Limelight,Lobster,Lobster Two,Londrina Outline,Londrina Shadow,Londrina Solid,Lora,Love Ya Like A Sister,Loved by the King,Lovers Quarrel,Luckiest Guy,Lusitana,Macondo,Macondo Swash Caps,Mako,Marck Script,Margarine,Marko One,Maven Pro,McLaren,MedievalSharp,Merienda One,Merriweather,Mervale Script,Metal Mania,Metrophobic,Milonga,Miltonian Tattoo,Miss Fajardose,Molle,Montez,Montserrat,Mr De Haviland,Mystery Quest,Neucha,New Rocker,Niconne,Nosifer,Nothing You Could Do,Noto Sans Oriya,Noto Serif,Nova Square,Nunito,Old Standard TT,Oleo Script,Oleo Script Swash Caps,Orbitron,Oregano,Orienta,Original Surfer,Oswald,Over the Rainbow,Overlock,Oxygen,Pacifico,Paprika,Parisienne,Patrick Hand SC,Paytone One,Peralta,Permanent Marker,Piedra,Pirata One,Play,Playball,Poetsen One,Poppins,Press Start 2P,Princess Sofia,PT Mono,Qwigley,Racing Sans One,Raleway,Rancho,Ranga,Ribeye,Roboto,Roboto Condensed,Roboto Slab,Rochester,Rock Salt,Rubik One,Sail,Salsa,Sansita One,Sarina,Satisfy,Schoolbell,Seaweed Script,Sevillana,Shadows Into Light,Shadows Into Light Two,Share,Six Caps,Skranji,Source Sans Pro,Spicy Rice,Stardos Stencil,Stoke,Syncopate,Teko,Terminal Dosis,The Girl Next Door,Tillana,Timmana,Titillium Web,Ubuntu,Ultra,Underdog,UnifrakturCook,UnifrakturMaguntia,Vampiro One,Vidaloka,Viga,Voces,Volkhov,Vollkorn,Voltaire,Waiting for the Sunrise,Wallpoet,Wellfleet,Wendy One,Yellowtail,Yesteryear,Zeyada]

font_size = 12; //[5,6,7,8,9,10,11,12,13,14,15,16,17,18,19]

// Hidden parameter
module stopCustomizer(){}

depth = 2;
letter_height = .75;
$fn=30;

//Let x be the length of one of three tag sides
x = (tag_height*sqrt(2)) / (2 + sqrt(2));

module tagName()
{
    linear_extrude(height = 3)
    text(tag_name, size = font_size, font = What_font);
}

difference() {
	tag(tag_width, tag_height, depth + letter_height);
	translate([2,2,depth]) tag(tag_width-4, tag_height-4, depth);
	translate([x/2, tag_height/2, 0]) cylinder(depth+letter_height, x/6, x/6);
}

difference() {
	translate([x/2, tag_height/2, 0]) cylinder(depth+letter_height, x/6+1, x/6+1);
#	translate([x/2, tag_height/2, 0]) cylinder(depth+letter_height, x/6, x/6);
}

module tag(w, h, d) {

	p_x = (h*sqrt(2)) / (2 + sqrt(2));

	difference() {
		cube([w, h, d]);

		translate([-p_x/2, h/2, 0]) rotate([0,0,45]) cube([50,50,d]);
		translate([-p_x/2, h/2, 0]) rotate([0,0,225]) cube([50,50,d]);
	}

}
translate([text_centering_left_to_right, text_centering_height,0]) tagName();
```


[User]
Hey, I'm looking to create a parametric mount for a spent primer tube on my Dillon XL650 reloading press. I've seen some designs online, but I need one that can handle different tube sizes. I'd like to be able to specify the outer diameter of the tubing I'm using, and the mount should adjust to fit.

Specifically, the mount needs to have a hole that accepts the tubing. I'm thinking I should be able to enter the tube's outer diameter as a variable, and the mount should resize this hole appropriately. I need to be able to specify the tube diameter between 12 mm and 17 mm, but I’d like the code to fail gracefully if the entered diameter is out of range. I need the mount itself to be largely based on an existing .stl file, which I'll provide. I'm hoping you can create the parametric OpenSCAD code for me, and I’m planning to supply the .stl file on my own.

The current code I have uses a difference to ream the hole in the STL, but maybe there's a cleaner way? Maybe something using the *hull()* function for a smoother look? I'm not sure if that would work for an STL but it's worth considering. The original code just imports and translates the STL, then adds the cylinder and does the difference. It's really simple, but I'd like to get a bit more robust design if possible.

Also, could you make the code fail gracefully if I enter a tube diameter outside the 12-17mm range? An error message would be great.

[Assistant]
Dillon_XL650_Spent_Primer_Tube_Parametrized.scad:
```
//
// Parametrized Dillon XL650 Spent Primer Tube Mount
//
// This is an adaptation of 'Dillon 650 Spent primer tube-mount' by BlaRock86
// http://www.thingiverse.com/thing:1685652
//
//

tubeOuterDiameter = 14; // [12:17]

// Enlarge the hole that the tube fits into. tubeOuterDiameter can be between 12 and 17 mm. For wider tubes, the wall gets too thin.
difference() {
    // import the original model, centered on the big hole
    translate([17.4, 0, 0]) import("Dillon650_spent_primer.stl");

    // ream out the hole for the tube in the original model
    tubeholeHeight = 12;
    $fn = 90;
    translate([0, 0, tubeholeHeight / 2 + 6]) cylinder(d = tubeOuterDiameter, h = tubeholeHeight, center = true);
}

```


[User]
Hi, I'm looking to create a parametric bag clip design in OpenSCAD. I've seen some great examples, but I want something highly customizable. I want to be able to control the overall length, the thickness when laid on its side, and the top-to-bottom height of the clip. I also need to control the meshing of the hinge, as well as the clearance between the parts to allow for variations in printing, and the thickness of the hinge cylinder itself. I'd also like to be able to rotate the top part of the clip to better fit on the print bed.

Specifically, here are the parameters I have in mind:

*   `length`: Overall length of the clip.
*   `clipThickness`: Thickness of the clip when laid flat.
*   `clipHeight`: Top-to-bottom thickness of the clip when laid flat.
*   `layerHeight`:  Used to set the gap between the model and the support for the custom hinge support.
*   `meshHeight`: Controls how thickly the hinge meshes together.
*  `clipClearance`: Adjusts the gap between the clip parts.
*   `hingeGapAt`: Thickness of the hinge's outer cylinder.
*   `topRotation`: Rotation of the top part of the clip.

The design should consist of a base and a top part that connect with a hinge. The base should have a cutout for the hinge cylinder, and the top part should mesh into that. I also want a custom support at the back of the hinge that will act as a helper. I expect this to be an arc. The values for layerHeight should be used to control the separation between this support and the model. Also, I'd like to ensure that the indentation on the clip and the raised matching part are created from the `clipHeight` and `clipThickness` parameters and some other parameters. Could you generate the OpenSCAD code for this design, and remember, the custom support is an arc.

[Assistant]
BagClip.scad:
```
length = 120; // [20:300]
// one of the two measures of sturdiness, this is the thickness of the main clip when laid on its side on the table.
clipThickness=16; //[7:40]
// the other measures of sturdiness, this is the top to bottom thickness of the main clip when laid on its side on the table.
clipHeight=12; // [4:40]
// this will essentially be used to set the thickness of the gap between model and support for the custom support at the back of the hinge.
layerHeight = 0.3;
// this allows you to tailor how thickly the hinge meshes together. A thin mesh will allow you to separate the two parts.
meshHeight=3; //[1:8]
// this is really about the tolerance of your printer and partly about how much stuff you intend to try to crush in the clip. It raises the head of the clip above it's default position.
clipClearance=.7;
// this lets you set the thickness of the hinge outer cylinder.
hingeGapAt=3; //[1:10]
// this lets you rotate the top part of the clip, thus letting you control how well you'll be able to fill your print bed.
topRotation=5.5; //[0:179]

module fillet(r, h) {
    difference() {
        cube([r + 0.01, r + 0.01, h], center = true);

        translate([r/2, r/2, 0])
            cylinder(r = r, h = h + 1, center = true);

    }
}

module arc(radiusID, radiusOD, height, angleR){
    translate([0,0,meshHeight])
//    rotate_extrude(angle=angleR)
//    polygon([[radiusID,0],[radiusOD,0],[radiusOD,clipHeight-(meshHeight*2)],[radiusID,clipHeight-(meshHeight*2)]]);

    intersection() {
        rotate_extrude()
        polygon([[radiusID,0],[radiusOD,0],[radiusOD,height],[radiusID,height]]);
        linear_extrude(height)
        polygon([[0,0],[radiusOD,0],[radiusOD,radiusOD],[radiusOD*cos(angleR)/sin(angleR),radiusOD]]);

    }

}

module clipBase() {
    difference() {
        union() {
            translate([length/2+clipThickness/4,-clipThickness/4,clipHeight/2])
            cube([length+clipThickness/2,clipThickness/2,clipHeight],center=true);
            cylinder(h=meshHeight-layerHeight,r=clipThickness/2);
            translate([0,0,clipHeight-(meshHeight-layerHeight)])
            cylinder(h=meshHeight-layerHeight,r=clipThickness/2);
            translate([length+clipThickness/2+1,-clipThickness/4+(clipThickness/2+2)/2-1,clipHeight/2])
            difference() {
                union() {
                    translate([0,clipClearance/2,0])
                    cube([1,clipThickness+clipClearance,clipHeight],center=true);
                    translate([-1,-clipThickness/2+0.5,0])
                    cube([1,1,clipHeight],center=true);
                    translate([-1+0.25,-clipThickness/2+0.25+1,0])
                    rotate([0,0,90])
                    fillet(0.5,clipHeight);

                }
                translate([0,-clipThickness/2+0.5,0])
                rotate([0,0,90])
                fillet(1,clipHeight+0.1);
            }
            translate([length+clipThickness/2-1.5,clipThickness/2+clipClearance,0])
            difference() {
                linear_extrude(clipHeight)
                polygon([[-1.5,0],[3,0],[3,3],[2,3],[-1.5,0.5]]);
                translate([2.5,2.5,clipHeight/2])
                rotate([0,0,180])
                fillet(1,clipHeight+0.1);
            }
        }
        translate([0,0,-0.05])
        cylinder(h=clipHeight+0.1,r=clipThickness/2-hingeGapAt);
        translate([length+clipThickness/2-1.99,-clipThickness/2+1.25,clipHeight/2])
    cube([4,0.5,clipHeight+0.1],center=true);

    }
    translate([clipThickness/2,0,clipHeight/4+clipHeight/2])
    rotate([0,90,0])
    linear_extrude(length)
    polygon([[0.2,0],[clipHeight/2-0.2,0],[clipHeight/4,clipThickness/4-0.2]]);
}
module clipTop() {
    difference() {
        rotate([0,0,topRotation])
        difference(){
            translate([length/2+clipThickness/4,+clipThickness/4,clipHeight/2])
            cube([length+clipThickness/2,clipThickness/2,clipHeight],center=true);
            translate([clipThickness/2-0.99,-0.01,clipHeight/4+clipHeight/2])
            rotate([0,90,0])
            linear_extrude(length+1)
            polygon([[0,0],[clipHeight/2,0],[clipHeight/4,clipThickness/4]]);
            translate([length+clipThickness/2-0.5,0.5,0])
            rotate([0,0,90])
            translate([0,0,clipHeight/2])
            fillet(1,clipHeight+1);
    //        translate([length+clipThickness/2-0.5,clipThickness/2-0.5,0])
    //        rotate([0,0,180])
    //        translate([0,0,clipHeight/2])
    //        fillet(1,clipHeight+1);
        }
        translate([0,0,-0.01])
        cylinder(h=meshHeight,r=clipThickness/2+0.5);
        translate([0,0,clipHeight-meshHeight+0.01])
        cylinder(h=meshHeight,r=clipThickness/2+0.5);

    }
    cylinder(h=clipHeight,r=clipThickness/2-hingeGapAt-0.5);
}
$fn=100;

clipBase();
clipTop();

// customSupport
rotate([0,0,114+topRotation/2])
arc(clipThickness/2-hingeGapAt,clipThickness/2,clipHeight-(meshHeight*2),145-topRotation);

```


[User]
Hey there, I need some help designing a tool for grabbing hot glass plates from my 3D printer. I've got a pretty good idea of what I want, and I even found an existing design (CustomizableGlassPlateGrabber.scad) that gets the basic shape right, but I want to make something from the ground up instead of relying on another person's design. The idea is to have a sort of clamp that I can use to grab a hot glass plate, and then it should also function as a stand to let the plate cool.

Here are the key features I'm looking for:

*   **Adjustable Clamp:** The design needs to be easily adjustable for different plate thicknesses. I'd like to specify the plate thickness and a tolerance value to ensure it grips firmly.
*   **Clamp Depths:** I need to control the depth of both the bottom and top clamps independently.
*   **Foot Height:** The height of the supporting "foot" should also be adjustable.
*   **Overall Width:** I need a parameter for the overall width of the grabber.
*   **Optional Hole:** An option to include a hole through the foot for hanging or other purposes would be great.
*   **Material Considerations:** I plan to print it with flexible filament, ABS, or maybe PLA. It needs to be robust enough for handling hot glass, but I'm not too worried about deformation (I'll keep an eye on it).
*  **Parametric Design:** Obviously, everything needs to be parametric, so I can change dimensions easily.

Essentially, I'm envisioning a sort of 'C' shape, where the top and bottom parts of the 'C' clamp onto the glass plate, and the vertical part of the 'C' acts as a foot when I set the glass plate down. The hole would go through this foot.

Could you generate the necessary OpenSCAD file for me that implements this design? I'm not using any special libraries myself, so I'm not expecting any specific imports or anything.

[Assistant]
CustomizableGlassPlateGrabber.scad:
```
/* Glass Plate Grabber and Support
 * By DrLex, 2016/12
 * Released under Creative Commons - Attribution - Share Alike license */

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

plateThickness = 3; //[1:0.1:10]
tolerance = 0.15; //[0:0.05:1]
bottomClampDepth = 15; //[5:25]
topClampDepth = 10; //[0:25]
footHeight = 15; //[0:1:40]
width = 60; //60; //[5:100]
hole = "yes"; //[yes,no]

/* [Hidden] */
halfTotalThickness = (plateThickness + tolerance)/2;
holeRadius = min(11, (footHeight+halfTotalThickness-1)/2);

difference() {
    linear_extrude(height=width) polygon(points=[
        [0, halfTotalThickness],
        [0, -halfTotalThickness],
        [-bottomClampDepth, -halfTotalThickness],
        [-bottomClampDepth-5, -halfTotalThickness-3],
        [-5, -halfTotalThickness-3],
        [-2, -footHeight-halfTotalThickness-3],
        [27, -footHeight-halfTotalThickness-3],
        [30, -halfTotalThickness-3],
        [30, 0],
        [27, halfTotalThickness+3],
        [-topClampDepth-5, halfTotalThickness+3],
        [-topClampDepth, halfTotalThickness]
    ]);

    if(hole == "yes") {
        translate([13.5, -footHeight/2, -1]) cylinder(h=width+2, r=holeRadius);
    }
}

```


[User]
Hey there, I'm looking to create a parametric toolmaker's clamp, similar to the one described in this video: [https://www.youtube.com/watch?v=1tRgONkbEdM](https://www.youtube.com/watch?v=1tRgONkbEdM). I've got a basic understanding of OpenSCAD, but I'd like some help building it, making it easy to customize.

I envision the clamp having two main parts: a "movable" jaw and a "fixed" jaw. The movable jaw has holes for a threaded rod or bolt and recesses for nuts. The fixed jaw will also have a hole for the threaded rod but should have a slightly oversized hole for it to slip through freely. Both jaws will have angled faces at one end to actually grab parts. Finally, there will be a bolt knob used to tighten the threaded rod.

I want to be able to adjust the following parameters, at a minimum:

*   **clampLength:** The overall length of the clamp
*   **clampThickness:** The thickness of the clamp in the Z-direction.
*   **clampWidth:** The width of the clamp in the Y-direction.
*   **clampAngle:** The angle of the clamp's angled faces in degrees.
*   **clampFixedTolerance:**  The extra diameter added to the fixed clamp's hole for the rod.
*   **nutWidth:** The point-to-point distance of the nut.
*   **nutThickness:** The thickness of the nut.
*   **screwDiameter:** The diameter of the threaded rod or bolt.
*   **clampSpacing:** This is just for display spacing when I render multiple clamps in OpenSCAD (not part of a single clamp design).
*   **boltKnobDiameter:** The diameter of the bolt knob.
*   **boltKnobLength:** The length of the bolt knob.
*   **boltKnobKnurlNum:** The number of knurls around the bolt knob.
*   **boltKnobKnurlDepth:** The depth of the knurls.
*   **boltKnobKnurlWidth:** The width of the knurls.
*   **boltKnobKnurlAngle:**  The angle of the knurls.

I would also like to have a dropdown menu similar to the one in the existing example I have, to let me pick between rendering "All," "Clamps", or "Bolt Knob".

I think it would be best to structure this in a single .scad file, using modules for each component: `clampMovable`, `clampFixed`, and `boltKnob`. Can you take a stab at this for me? No need to use any specialized libraries for this, just basic OpenSCAD. Thanks!

[Assistant]
toolmakersClamps.scad:
```
/***********************************************************************
Name ......... : toolmakersClamp.scad
Description....: Parametric Tool Makers Clamp
Author ....... : Garrett Melenka
Version ...... : V1.0 2016/12/11
Licence ...... : GPL
***********************************************************************/

//Part Selection Dropdown Menu
part = 0; //[0:All, 1:Clamps, 2: Bolt Knob]

//**********************************************************************
//Dimensions for 3mm Screw
//**********************************************************************
//clampLength = 50;
//clampThickness = 6.35;
//clampWidth = 8;
//nutWidth = 6.1;
//nutThickness = 2.4;
//screwDiameter = 3.0;

//***********************************************************************
//Dimensions for 1/4-20 Threaded Rod
//***********************************************************************
//Total Length of Clamp
clampLength = 114;

//Thickness of Clamp in z direction
clampThickness = 12.7;

//Width of Clamp in y direction
clampWidth = 15.875;

//Angle of the Clamp Nose
clampAngle = 15;

//Tolerance to oversize fixed clamp hole
clampFixedTolerance = 0.1;

//Measure Point to Point distance on nut
nutWidth = 12.5;

//Measure Nut Thickness
nutThickness = 5.5;

//Diameter of screw to be used
screwDiameter = 6.35;

//Set spacing between clamps for printing
clampSpacing = 20;

//********************************************************************
//Dimensions for bolt knob
//********************************************************************
//Diameter of bolt knob
boltKnobDiameter = 15;
//Length of bolt knob
boltKnobLength = 15;
//Number of knurls around Knob Diameter
boltKnobKnurlNum = 15;
//Depth of knurls
boltKnobKnurlDepth = 0.5;
//Width of knurls
boltKnobKnurlWidth = 0.5;
//Angle of knurling
boltKnobKnurlAngle = 100;

module clampMovable()
{

    difference()
    {
    cube(size = [clampLength, clampWidth, clampThickness], center = true);

     translate([clampLength*(1/8),0,0]){

         cylinder(r=screwDiameter*0.5, h = clampThickness+0.2, center = true, $fn=100);
     }

     translate([-0.5*clampLength+clampLength*(1/8),0,0]){

         cylinder(r=screwDiameter*0.5, h = clampThickness+0.2, center = true, $fn=100);
     }

    translate([clampLength*(1/8),-clampWidth*0.5+nutWidth*0.5,0]){

        cube(size = [nutWidth, clampWidth, nutThickness], center = true);
    }

    translate([-0.5*clampLength+clampLength*(1/8),-clampWidth*0.5+nutWidth*0.5,0]){
        cube(size = [nutWidth, clampWidth, nutThickness], center = true);
    }

    translate([clampLength*0.5, 0, clampThickness*0.5]){
    rotate([0,clampAngle,0]){
    cube(size = [clampLength, clampWidth+0.2, clampThickness], center = true);
    }
    }

    }

}

module clampFixed()
{

    difference()
    {
    cube(size = [clampLength, clampWidth, clampThickness], center = true);

     translate([clampLength*(1/8),0,0]){

         cylinder(r=screwDiameter*0.5+clampFixedTolerance, h = clampThickness+0.2, center = true, $fn=100);
     }

     translate([-0.5*clampLength+clampLength*(1/8),0,-clampThickness*0.5]){

         cylinder(r=screwDiameter*0.5+clampFixedTolerance, h = clampThickness+0.2, center = true, $fn=100);
     }

    translate([clampLength*0.5, 0, clampThickness*0.5]){
    rotate([0,clampAngle,0]){
    cube(size = [clampLength, clampWidth+0.2, clampThickness], center = true);
    }
    }

    }

}

//********************************************************************************
//Knob that allows for the bolt to be adjusted
//********************************************************************************
module boltKnob()
{

    if(boltKnobDiameter> nutWidth)
    {

    difference(){
    cylinder(r=boltKnobDiameter*0.5, h=boltKnobLength, center = true, $fn=100);
    translate([0,0,-(boltKnobLength*0.5)+nutThickness*0.5]){
    cylinder(r= nutWidth*0.5, h = nutThickness, center = true, $fn=6);
    }

    //translate([boltKnobDiameter*0.5, 0,0])

    for (i = [1:1:boltKnobKnurlNum])

    rotate([0,0,360*i/boltKnobKnurlNum]){
    {

        linear_extrude(height = boltKnobLength, center = true, twist = boltKnobKnurlAngle){
            translate([boltKnobDiameter*0.5, 0,0]){
        square(size = [boltKnobKnurlDepth,boltKnobKnurlWidth], center = true);
            }
        }

        linear_extrude(height = boltKnobLength, center = true, twist = -boltKnobKnurlAngle){
            translate([boltKnobDiameter*0.5, 0,0]){
        square(size = [boltKnobKnurlDepth,boltKnobKnurlWidth], center = true);
            }
        }
     }
    }
}
}
    else
    {
        echo("Knob diameter is less than nut width");
    }
}

if (part == 0)
{
clampMovable();

translate([0,clampSpacing, 0]){
clampFixed();
}

translate([0,clampSpacing*2, 0]){
    rotate([0,180,0]){
    boltKnob();
    }
}

translate([0,clampSpacing*3, 0]){
    rotate([0,180,0]){
    boltKnob();
    }
}

}

if (part == 1)
{
clampMovable();

translate([0,clampSpacing, 0]){
clampFixed();
}
}

if (part == 2)
 {
    rotate([0,180,0]){
    boltKnob();
    }
}
```


[User]
I'd like to design a customizable pen holder, similar to the "cubistand" design I saw on Thingiverse. The idea is a grid of square holes, with rounded corners on the outer edges of the entire structure. I want to be able to easily adjust the following:

*   **Wall Thickness:** How thick the walls between the pen holes are.
*   **Grid Height:** The overall height of the grid structure.
*   **Square Size:** The side length of each square pen hole.
*   **Number of Squares (X and Y):** How many squares there are in both the X and Y directions.
*   **Corner Radius:** How rounded the corners are. If this is 0, the corners should be sharp.
*   **Floor Height:** The thickness of a solid base underneath the grid. If this is 0, there should be no base.

I need the code to be in OpenSCAD, and I want the parameters to be easily changeable at the top of the file. I want to make sure that the corners are truly rounded, and that they don't have those weird flat spots I sometimes see on the preview. I'm thinking a cylinder subtraction at the corners might be the way to go.

Basically, I need an OpenSCAD file that generates a structure of square holes arranged in a grid with customizable dimensions and rounded corners, with the option of a floor at the base of the structure, where the floor has the same corner rounding as the structure.

[Assistant]
portalapices_Javi.scad:
```
// all dimensions in millimeters
//How thick each wall is in mm
wall_thickness = 10/8;
//How tall is the grid?
grid_height=10;
//side length of pen hole square
square_size=10;
//How many squares long?
X_squares=7;
//How many squares Wide?
Y_squares=7;
//rounded corners?, 0 means sharp corners
corner_radius=3;
//0 means no floor
floor_height = 1;

//example 1: seen on http://www.thingiverse.com/thing:1294085/#files
//cubistand base.stl
//wall_thickness = 10/8;
//square_size=10;
//X_squares=7;
//Y_squares=7;
//corner_radius=3;
//grid_height=10;
//floor_height = 1;

//example 2: seen on http://www.thingiverse.com/thing:1294085/#files
//cubistand main.stl
//wall_thickness = 10/8;
//square_size=10;
//X_squares=7;
//Y_squares=7;
//corner_radius=3;
//grid_height=10;
//floor_height = 0; //0 means no floor

//example 3: seen on http://www.thingiverse.com/thing:1294085/#files
//cubistand_rod_cap.stl
//wall_thickness = 10/8;
//square_size=10;
//X_squares=1;
//Y_squares=1;
//corner_radius=0;
//grid_height=5;
//floor_height = 1; //0 means no floor

total_height=grid_height+floor_height;
$fn=30; //higher number, smoother curve surface, longer render time

//generation of grid
translate([0,0,floor_height ])
difference()
{
for (j=[1:Y_squares])
    translate([0,(j-1)*(square_size+wall_thickness),0])
for (i=[1:X_squares])
   translate([(i-1)*(square_size+wall_thickness),0,0])
     difference () {
         cube([square_size+2*wall_thickness,square_size+2*wall_thickness,grid_height]);
         translate([wall_thickness,wall_thickness,0])
            cube([square_size,square_size,grid_height]);

     }

//remove corners
 cube([corner_radius,corner_radius,grid_height]);

  translate(  [X_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0,0])
      cube([corner_radius,corner_radius,grid_height]);

  translate(  [0,Y_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0])
      cube([corner_radius,corner_radius,grid_height]);

  translate(  [X_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,Y_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0])
      cube([corner_radius,corner_radius,grid_height]);

 }

 //make rounded corners
 intersection()
 {
  cube([corner_radius,corner_radius,total_height]);
 translate(  [corner_radius,corner_radius,0])
  difference()
     {
     cylinder(  total_height,    corner_radius,    corner_radius);
       cylinder(  total_height,    corner_radius-wall_thickness,    corner_radius-wall_thickness);
     }
 }

 intersection()
 {
  cube([corner_radius,corner_radius,total_height]);
 translate(  [corner_radius,corner_radius,0])
  difference()
     {
     cylinder(  total_height,    corner_radius,    corner_radius);
       cylinder(  total_height,    corner_radius-wall_thickness,    corner_radius-wall_thickness);
     }
 }

 translate(  [X_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0,0])
  intersection()
 {
  cube([corner_radius,corner_radius,total_height]);
 translate(  [0,corner_radius,0])
  difference()
     {
     cylinder(  total_height,    corner_radius,    corner_radius);
       cylinder(  total_height,    corner_radius-wall_thickness,    corner_radius-wall_thickness);
     }
 }

translate(  [0,Y_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0])
  intersection()
 {
  cube([corner_radius,corner_radius,total_height]);
 translate(  [corner_radius,0,0])
  difference()
     {
     cylinder(  total_height,    corner_radius,    corner_radius);
       cylinder(  total_height,    corner_radius-wall_thickness,    corner_radius-wall_thickness);
     }
 }

 translate(  [X_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,Y_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0])
  intersection()
 {
  cube([corner_radius,corner_radius,total_height]);
 translate(  [0,0,0])
  difference()
     {
     cylinder(  total_height,    corner_radius,    corner_radius);
       cylinder(  total_height,    corner_radius-wall_thickness,    corner_radius-wall_thickness);
     }
 }

 //para hacer el suelo, si lo hay (floor_height>1)
 //hago un cubo del tamaño total, de altura -floorheight
 //le quito las esquinas y añado cilindros
 difference()
{
 cube(  [X_squares*(square_size+wall_thickness)+wall_thickness,Y_squares*(square_size+wall_thickness)+wall_thickness, floor_height]);

    //remove corners
 cube([corner_radius,corner_radius,floor_height]);

  translate(  [X_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0,0])
      cube([corner_radius,corner_radius,floor_height]);

  translate(  [0,Y_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0])
      cube([corner_radius,corner_radius,floor_height]);

  translate(  [X_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,Y_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0])
      cube([corner_radius,corner_radius,floor_height]);
}

//añado cilindros en las esquinas del suelo
// esquina 0,0
translate(  [corner_radius,corner_radius,0])
     cylinder(  floor_height,    corner_radius,    corner_radius);

//esquina X,0
 translate(  [X_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,corner_radius,0])
     cylinder(  floor_height,    corner_radius,    corner_radius);

//esquina 0,Y
translate(  [corner_radius,Y_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0])
     cylinder(  floor_height,    corner_radius,    corner_radius);

//esquina X,Y
 translate(  [X_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,Y_squares*(square_size+wall_thickness)-corner_radius+wall_thickness,0])
     cylinder(  floor_height,    corner_radius,    corner_radius);

```


[User]
Okay, I need a custom portafilter holder for my Baratza Vario coffee grinder. The stock holder is terrible - it makes a mess, doesn't hold the portafilter securely, and breaks easily. I'm looking for something that addresses those issues.

Here's what I envision:

**Functionality:**

*   **Secure Fit:** The holder needs to hold my 58mm portafilter tightly so coffee grounds don't fly everywhere.
*   **Hands-Free Operation:** I should be able to leave the portafilter in the holder and not have to hold it while the grinder is running, allowing for one-handed operation.
*   **Even Distribution:** When I slide the portafilter out of the holder, the coffee grounds should come out evenly distributed.
*   **Baratza Vario Integration:** The holder needs to snap securely into the notches of the Baratza Vario grinder.

**Design Details:**

*   **Funnel:** The design should incorporate a funnel to guide the coffee grounds into the portafilter.
*   **Portafilter Mount:** It needs a mount designed to hold a 58mm portafilter with a mounting diameter of 78.4mm, a flange height of 10.0mm, and a flange depth of 4.0mm (these are for my Breville portafilter, but I want the design to be parametric).
*   **Wall Thickness:** The wall thickness should be around 2.4mm, which seems to work well for a 0.4mm extrusion width (I'm printing this on an FDM printer).
*   **Overall Height:** The funnel height should be around 20mm, and the overall holder height should be around 119.50mm.
*   **Holder Nub:** The holder has a nub with an offset of 9.5mm, a diameter of 4.5mm, that interfaces with the Vario.
*   **Leg Width:** The legs should be 29.3mm wide.
*   **Top Stop:**  There should be a top stop/lock with a width of 11.75mm and a depth of 2.0mm.
*   **Parametric:** The design needs to be parametric in OpenSCAD, so I can easily adjust dimensions for different portafilters. I'd like to have variables for the portafilter diameter, mounting diameter, flange height, flange depth, funnel height, wall thickness, holder height, nub offset and diameter, portafilter offset, leg width, stop width, and stop depth.
*   **Printable:** The design should be printable without supports ideally. It should be oriented such that the majority of the structure sits on the print bed for stability, and it should avoid large overhangs if possible.

**Libraries:**

I'm not asking for anything too complex, so I don't anticipate needing any external libraries like MCAD, BOSL, or similar.

I realize this is a complex request. I'd be most grateful if you could generate a complete OpenSCAD file or files that meet these requirements. I'm really excited to get this printed!

[Assistant]
baratza_vario.scad:
```
// Baratza Vario portafilter
// Design by Marius Gheorghescu, Dec 2016

// portafilter diameter (58mm typical)
portafilter_dia = 58;

// portafilter mount diameter (example: 78.4mm for Breville)
portafilter_mount_dia = 78.4;

// portafilter flange height (example: 10mm for Breville)
portafilter_mount_height = 10.0;

// portafilter flage depth (example: 4mm for Breville)
portafilter_mount_deep = 4.0;

// how tall the funnel is (20mm typical)
funnel_height = 20;

// thickness of the walls (2.4mm gives good results for 0.4mm extrusion width)
wall_thick = 2.4;

/* [Hidden] */

// holder specs
holder_height = 119.50;
holder_nub_offset = 9.5;
holder_nub_dia = 4.5;

portafilter_offset = 10;

leg_width = 29.3;

// top stop/lock
stop_width = 11.75;
stop_depth = 2.0;

$fn=100;

epsilon = 0.01;

// funnel
module funnel()
{
    notch_distance = 56.5;
    peg_distance = 80.5;

    front_brace_size = 70;//peg_distance + 2*wall_thick;
    brace_width = 10;

    translate([0,0,funnel_height/2])
    difference() {
        union() {
            hull() {
                cylinder(r=portafilter_dia/2+wall_thick, h=funnel_height, center=true);

                translate([0, portafilter_dia/2 + wall_thick/2 + portafilter_offset,0])
                    cube([leg_width, wall_thick, funnel_height], center=true);

                // back brace
                translate([0,portafilter_dia/2 + portafilter_offset - brace_width/2 + wall_thick, -funnel_height/2 + wall_thick/2])
                    cube([portafilter_dia, brace_width,wall_thick], center=true);

                //notch brace
                translate([0,-portafilter_dia/2 + 2, -funnel_height/2 + wall_thick/2])
                    cube([front_brace_size,brace_width,wall_thick], center=true);
            }

            // front brace
            translate([0,-portafilter_dia/2 + 2, -funnel_height/2 + wall_thick/2 - 1.5])
                cube([front_brace_size,brace_width,wall_thick], center=true);

            // top notches
            translate([notch_distance/2, -portafilter_dia/2 + wall_thick + 2, -funnel_height/2 - 1.5])
                //cylinder(r=0.75, h=2, center=true);
                sphere(r=2.5/2, center=true);

            translate([-notch_distance/2, -portafilter_dia/2 + wall_thick + 2, -funnel_height/2 - 1.5])
                sphere(r=2.5/2, center=true);

            /*
            // top pegs
            translate([peg_distance/2, -portafilter_dia/2 + wall_thick, -funnel_height/2 - 1.5])
                cube([1.5, 1.75, 2], center=true);

            translate([-peg_distance/2, -portafilter_dia/2 + wall_thick, -funnel_height/2 - 1.5])
                cube([1.5, 1.75, 2], center=true);
            */
        }

        // portafilter/inside funnel
        cylinder(r=portafilter_dia/2, h=2*funnel_height + epsilon, center=true);

        // clearance
        translate([0,portafilter_dia/2, -funnel_height/2 + stop_depth/2 - epsilon])
            cube([stop_width, portafilter_dia, stop_depth], center=true);
    }

}

// portafilter support

module portafilter_mount()
{
    pf_heigt = portafilter_mount_height + 2*wall_thick;

    translate([0,0, pf_heigt/2 + funnel_height - wall_thick])
    difference() {
        hull() {
            cube([portafilter_mount_dia + 2*wall_thick, portafilter_dia/2, pf_heigt], center=true);

            translate([0, portafilter_dia/2 + wall_thick/2 + portafilter_offset, -pf_heigt/2 + holder_height/6])
                cube([leg_width, wall_thick, holder_height/3], center=true);

        }

        // flaps clearance
        cube([portafilter_mount_dia, portafilter_dia/2 + epsilon + wall_thick, portafilter_mount_height], center=true);

        hull() {
            // portafilter slide-in clearance
            translate([0,0,wall_thick])
                cube([portafilter_mount_dia - 2*portafilter_mount_deep, portafilter_dia/2 + epsilon, pf_heigt], center=true);

            // portafilter clearance
            translate([0,0,holder_height/2 - portafilter_mount_height/2])
                cylinder(r=portafilter_mount_dia/2 - portafilter_mount_deep, h=holder_height, center=true);
        }

        cylinder(r=portafilter_mount_dia/2, h=portafilter_mount_height + epsilon, center=true);

        // funnel clearance
        cylinder(r=portafilter_dia/2, h=pf_heigt + epsilon, center=true);
    }
}

module leg()
{
    // leg
    hull() {
        translate([0, portafilter_dia/2 + wall_thick/2 + portafilter_offset,(holder_height-funnel_height)/2 + funnel_height])
            cube([leg_width, wall_thick, holder_height - funnel_height], center=true);

        translate([0, portafilter_dia/2 + wall_thick/2 + portafilter_offset,  wall_thick*1.5])
            cube([portafilter_dia - wall_thick, wall_thick, wall_thick], center=true);
    }

    // foot
    difference() {
        union() {

            // strength brace right
            translate([-(leg_width-wall_thick)/2,0,0])
                hull() {
                    translate([-portafilter_dia/4, portafilter_dia/2 + wall_thick/2 + portafilter_offset, wall_thick/2])
                        cube([wall_thick, wall_thick,wall_thick], center=true);

                    translate([0, portafilter_dia/2 + wall_thick/2 + portafilter_offset - leg_width/2 + wall_thick/2, holder_height - wall_thick/2])
                        cube([wall_thick, leg_width, wall_thick], center=true);
                }

            // strength brace left
            translate([(leg_width-wall_thick)/2,0,0])
                hull() {
                    translate([portafilter_dia/4, portafilter_dia/2 + wall_thick/2 + portafilter_offset, wall_thick/2])
                        cube([wall_thick, wall_thick,wall_thick], center=true);

                    translate([0, portafilter_dia/2 + wall_thick/2 + portafilter_offset - leg_width/2 + wall_thick/2, holder_height - wall_thick/2])
                        cube([wall_thick, leg_width, wall_thick], center=true);
                }

            translate([0, portafilter_dia/2 + wall_thick + portafilter_offset - leg_width/2 , holder_height - wall_thick/2])
                hull() {
                    translate([0,leg_width/2 - wall_thick/2,0])
                        cube([leg_width, wall_thick, wall_thick], center=true);
                    //cylinder(r=leg_width/2, h=wall_thick, center=true);
                    #cube([leg_width, leg_width, wall_thick], center=true);
                }
        }

        // nub
        #translate([0, portafilter_dia/2 + wall_thick + portafilter_offset - holder_nub_offset, holder_height])
            sphere(r=holder_nub_dia/2, center=true);
     }
 }

// make printable ideally without supports
rotate([-90,0,-90])
{
    funnel();

    portafilter_mount();

    leg();
}

```


[User]
I want to create a customizable set of letter tiles, and I'd like to be able to control a lot of aspects of their design. I'm thinking of things like the size of the tile, the text on it, and even adding images. I’d also like the option of adding holes for stringing them together. Can you help me generate the necessary OpenSCAD code?

Specifically, here are the things I need to be able to control:

*   **Extrusion Settings:** I need to specify if the text/image should be *cut* out of the tile or *added* on top of it. I also need to control the extrusion height.

*   **Text Settings:** I need to be able to specify the text for each tile, its size relative to the tile height, the text's aspect ratio, the font, and the text style (regular, bold, italic, bold italic).  I would need to use fonts from the Liberation family.

*   **Tile Settings:** I need control over the tile's height, width (with an option to automatically size the width based on the text), its thickness, a separator character to split the tile text, and a width multiplier for autosized tiles.

*   **Hole Settings:** I need to specify the diameter of the holes, and how many side and top holes to include (0 to 3).

*   **Chamfer Settings:** I need control over the size of the top, side and corner chamfers, and whether to apply a chamfer on the bottom.

*   **Layout Settings:** I need to specify how many tiles fit in a single row, and the spacing between the tiles.

*   **Image Tile Settings:** I need an option to use a single image tile instead of a text one. I need to control the image's height and width as percentages of the tile, and load a 100x100 pixel image. I need the code to be able to use a `.png` file.

Essentially, I'd like a single main file that lets me control all of these parameters. I'd also like it to handle splitting a string into multiple tiles based on a separator character.

[Assistant]
tiles.scad:
```
// Customizable Letter Tiles
// Will Schleter (wschleter@gmail.com)
//  Dec 14, 2016 - original version
//  Oct 17, 2018 - added option to cut out the design

/* [Extrusion Settings] */
// this is how the image is added to the tile
cut_or_add = "add"; // [cut,add]
// extrusion height (mm)
e = 0.6;

/* [Text Settings] */
// Tile text
txt = "Z";
// Text size as percentage of tile height
ts = 0.75;
// Text aspect ratio - w/h
ar = 0.8;
// Text font
fn = "Serif"; // [Sans, Mono, Sans Narrow, Serif]
// Text style
tst = "bold italic"; //[:Regular,bold:Bold,italic:Italic,bold italic:Bold/Italic]

/* [Tile Settings] */
// Tile height (mm)
th = 15;
// Tile width (mm, use 0 to autosize)
tw = 15;
// Tile thickness (mm)
tt = 4;
// Tile separator - character in text used to split, leave empty to split on every character
sep = "";
// Tile width multiplier (use to adjust width of autosized tiles)
twm = 1;

/* [Hole Settings] */
// Hole diameter (mm)
d = 1;
// Number of side holes
ns = 2; // [0,1,2,3]
// Number of top holes
nt = 3; // [0,1,2,3]

/* [Chamfer Settings] */
// Top chamfer size (mm)
cht = 1;
// Side chamfer size (mm)
chs = 1;
// Corner chamfer size (mm)
chc = 1;
// Chamfers on bottom
chb = 1; // [0:No, 1:Yes]

/* [Layout Settings] */
// Number of tiles per row
tpr = 4;
// Tile spacing (mm)
sp = 2;

/* [Image Tile] */
// Use image (if set to yes the text settings will be ignored and a single tile generated)
useimg = 0; // [0:No, 1:Yes]
// Image height as percentage of tile height
ih = 0.75;
// Image width as percentage of tile width
iw = 0.75;
// Upload an 100x100 image that will be used
image_file = "dog.png"; // [image_surface:100x100]

// split text into tiles
txt2 = useimg==1 ? " " : txt;
list = len(sep)==0 ? str2vec(txt2) : split(txt2,sep);

// loop through each tile
h=th;
w=tw;
t=tt;
tilesperrow = (tw==0) ? 1 : tpr; // force tpr to be 1 if autowidth
for (j=[0:len(list)-1]) {
  // make and position each tile
  w = (tw>0) ? tw : (len(list[j]) + 0.5)*th*ts*ar*twm;
  row = floor(j/tilesperrow);
  yy = -row*(h+sp);
  xx = (j-row*tilesperrow)*(w+sp);
  translate([xx,yy,0]) makeTile(list[j],w);
}

module makeBlankTile(w) {
    difference() {
      makeBlock(w);
      if (nt>0) { makeTopHoles(w); }
      if (ns>0) { makeSideHoles(w); }
      }
}

module makeTile(letter,w) {
    if (cut_or_add=="add") {
        union() {
        makeBlankTile(w);
        if (useimg) makeImage(w);
        else makeText(letter,w);
        }
    } else {
        difference() {
        makeBlankTile(w);
        if (useimg) makeImage(w);
        else makeText(letter,w);
        }
    }
}

module makeBlock(w) {
// three intersecting polygon extrusions are used to support chamfers on all edges
  intersection() {

// this is the y (height) polygon
  rotate([-90,0,0])
  linear_extrude(h)
  polygon([[chs,0],[w-chs,0],[w,chs],[w,t-chs*chb],[w-chs*chb,t],[chs*chb,t],[0,t-chs*chb],[0,chs]]);

 // this is the x (width) polygon
  translate([w,0,0])
  rotate([-90,0,90])
  linear_extrude(w)
  polygon([[cht,0],[h-cht,0],[h,cht],[h,t-cht*chb],[h-cht*chb,t],[cht*chb,t],[0,t-cht*chb],[0,cht]]);

 // this is the z (thickness) polygon
  translate([0,0,-t])
  rotate([0,0,0])
  linear_extrude(t)
  polygon([[chc,0],[w-chc,0],[w,chc],[w,h-chc],[w-chc,h],[chc,h],[0,h-chc],[0,chc]]);

}
}

module makeTopHoles(w) {
  s=w/(nt+1);
  for (i=[0:nt-1]) {
    translate([i*s+s,h/2,-t/2])
    rotate([-90,0,0])
    cylinder(h=h*2, d=d, center=true,$fn=36);
  }
}

module makeSideHoles(w) {
  s=h/(ns+1);
  for (i=[0:ns-1]) {
    translate([w/2,i*s+s,-t/2])
    rotate([0,90,0])
    cylinder(h=w*2, d=d, center=true,$fn=36);
  }
}

module makeText(letter,w) {
//text on top
  translate([w/2,h/2,-e])
  linear_extrude(height = e*2)
  scale([ar,1,1])
  text(text = letter,
            font = str("Liberation ",fn,":style=",tst),
            size = h*ts,
            valign = "center",
            halign = "center");

}

module makeImage(w) {
translate([w*(1-iw)/2,h*(1-iw)/2,e])
scale([w*iw/(imgW-1),h*ih/(imgH-1),2*e])
surfaceNoBase(file=image_file,invert=true);
}

module surfaceNoBase(convexity=10,invert=false) {
    // when an XxY resolution image is loaded via the surface command,
    // it becomes an (X-1)x(Y-1)x101 solid image, with a rectangular base.
    // to further complicate things, if the invert option is used,
    // the resulting solid is shifted
    // this module removes the base and corrects for the shifting
    // note: centering isn't supported because I could not find a way of obtaining the image resolution

    translate([0,0,-1])  // shift back down to z=0
    intersection() {
        translate([0,0,invert ? 100:0]) // correct for shifting if inverted
        surface(file = file, invert=invert, convexity=convexity); // make the surface
        translate([0,0,1]) cube([1000,1000,100]); // this cube cuts of the bottom 2 units
    }
}
///////////////////////////////////////////////////////////////////
// functions below from http://www.thingiverse.com/thing:1237203 //
///////////////////////////////////////////////////////////////////

/**** split ****

[vect] split(`str`, `[sep]`)
Returns a vector of substrings by cutting the string `str` each time where `sep` appears.
See also: strcat(), str2vec()

Arguments:
- [str] `str`: The original string.
- [char] `sep`: The separator who cuts the string (" " by default).

Usage:
str = "OpenScad is a free CAD software.";
echo(split(str)); // ["OpenScad", "is", "a", "free", "CAD", "software."]
echo(split(str)[3]); // "free"
echo(split("foo;bar;baz", ";")); // ["foo", "bar", "baz"]
*/
function split(str, sep=" ", i=0, word="", v=[]) =
	i == len(str) ? concat(v, word) :
	str[i] == sep ? split(str, sep, i+1, "", concat(v, word)) :
	split(str, sep, i+1, str(word, str[i]), v);

/**** str2vec ****

[vect] str2vec(`str`)
Returns a vector of chars, corresponding to the string `str`.
See also: split()

Arguments:
- [str] `str`: The original string.

Usage:
echo(str2vec("foo")); // ["f", "o", "o"]
*/
function str2vec(str, v=[], i=0) =
	i == len(str) ? v :
	str2vec(str, concat(v, str[i]), i+1);

/**** substr ****

[str] substr(`str`, `[pos]`, `[len]`)
Returns a substring of a string.

Arguments:
- [str] `str`: The original string.
- [int] `pos` (optional): The substring position (0 by default).
- [int] `len` (optional): The substring length (string length by default).

Usage:
str = "OpenScad is a free CAD software.";
echo(substr(str, 12)); // "a free CAD software."
echo(substr(str, 12, 10)); // "a free CAD"
echo(substr(str, len=8)); // or substr(str, 0, 8); // "OpenScad"
*/
function substr(str, pos=0, len=-1, substr="") =
	len == 0 ? substr :
	len == -1 ? substr(str, pos, len(str)-pos, substr) :
	substr(str, pos+1, len-1, str(substr, str[pos]));
```
tiles.scad:
```
// Customizable Letter Tiles
// Will Schleter (wschleter@gmail.com)
//  Dec 14, 2016 - original version
//  Oct 17, 2018 - added option to cut out the design

/* [Extrusion Settings] */
// this is how the image is added to the tile
cut_or_add = "add"; // [cut,add]
// extrusion height (mm)
e = 0.6;

/* [Text Settings] */
// Tile text
txt = "Z";
// Text size as percentage of tile height
ts = 0.75;
// Text aspect ratio - w/h
ar = 0.8;
// Text font
fn = "Serif"; // [Sans, Mono, Sans Narrow, Serif]
// Text style
tst = "bold italic"; //[:Regular,bold:Bold,italic:Italic,bold italic:Bold/Italic]

/* [Tile Settings] */
// Tile height (mm)
th = 15;
// Tile width (mm, use 0 to autosize)
tw = 15;
// Tile thickness (mm)
tt = 4;
// Tile separator - character in text used to split, leave empty to split on every character
sep = "";
// Tile width multiplier (use to adjust width of autosized tiles)
twm = 1;

/* [Hole Settings] */
// Hole diameter (mm)
d = 1;
// Number of side holes
ns = 2; // [0,1,2,3]
// Number of top holes
nt = 3; // [0,1,2,3]

/* [Chamfer Settings] */
// Top chamfer size (mm)
cht = 1;
// Side chamfer size (mm)
chs = 1;
// Corner chamfer size (mm)
chc = 1;
// Chamfers on bottom
chb = 1; // [0:No, 1:Yes]

/* [Layout Settings] */
// Number of tiles per row
tpr = 4;
// Tile spacing (mm)
sp = 2;

/* [Image Tile] */
// Use image (if set to yes the text settings will be ignored and a single tile generated)
useimg = 0; // [0:No, 1:Yes]
// Image height as percentage of tile height
ih = 0.75;
// Image width as percentage of tile width
iw = 0.75;
// Upload an 100x100 image that will be used
image_file = "dog.png"; // [image_surface:100x100]

// split text into tiles
txt2 = useimg==1 ? " " : txt;
list = len(sep)==0 ? str2vec(txt2) : split(txt2,sep);

// loop through each tile
h=th;
w=tw;
t=tt;
tilesperrow = (tw==0) ? 1 : tpr; // force tpr to be 1 if autowidth
for (j=[0:len(list)-1]) {
  // make and position each tile
  w = (tw>0) ? tw : (len(list[j]) + 0.5)*th*ts*ar*twm;
  row = floor(j/tilesperrow);
  yy = -row*(h+sp);
  xx = (j-row*tilesperrow)*(w+sp);
  translate([xx,yy,0]) makeTile(list[j],w);
}

module makeBlankTile(w) {
    difference() {
      makeBlock(w);
      if (nt>0) { makeTopHoles(w); }
      if (ns>0) { makeSideHoles(w); }
      }
}

module makeTile(letter,w) {
    if (cut_or_add=="add") {
        union() {
        makeBlankTile(w);
        if (useimg) makeImage(w);
        else makeText(letter,w);
        }
    } else {
        difference() {
        makeBlankTile(w);
        if (useimg) makeImage(w);
        else makeText(letter,w);
        }
    }
}

module makeBlock(w) {
// three intersecting polygon extrusions are used to support chamfers on all edges
  intersection() {

// this is the y (height) polygon
  rotate([-90,0,0])
  linear_extrude(h)
  polygon([[chs,0],[w-chs,0],[w,chs],[w,t-chs*chb],[w-chs*chb,t],[chs*chb,t],[0,t-chs*chb],[0,chs]]);

 // this is the x (width) polygon
  translate([w,0,0])
  rotate([-90,0,90])
  linear_extrude(w)
  polygon([[cht,0],[h-cht,0],[h,cht],[h,t-cht*chb],[h-cht*chb,t],[cht*chb,t],[0,t-cht*chb],[0,cht]]);

 // this is the z (thickness) polygon
  translate([0,0,-t])
  rotate([0,0,0])
  linear_extrude(t)
  polygon([[chc,0],[w-chc,0],[w,chc],[w,h-chc],[w-chc,h],[chc,h],[0,h-chc],[0,chc]]);

}
}

module makeTopHoles(w) {
  s=w/(nt+1);
  for (i=[0:nt-1]) {
    translate([i*s+s,h/2,-t/2])
    rotate([-90,0,0])
    cylinder(h=h*2, d=d, center=true,$fn=36);
  }
}

module makeSideHoles(w) {
  s=h/(ns+1);
  for (i=[0:ns-1]) {
    translate([w/2,i*s+s,-t/2])
    rotate([0,90,0])
    cylinder(h=w*2, d=d, center=true,$fn=36);
  }
}

module makeText(letter,w) {
//text on top
  translate([w/2,h/2,-e])
  linear_extrude(height = e*2)
  scale([ar,1,1])
  text(text = letter,
            font = str("Liberation ",fn,":style=",tst),
            size = h*ts,
            valign = "center",
            halign = "center");

}

module makeImage(w) {
translate([w*(1-iw)/2,h*(1-iw)/2,e])
scale([w*iw/(imgW-1),h*ih/(imgH-1),2*e])
surfaceNoBase(file=image_file,invert=true);
}

module surfaceNoBase(convexity=10,invert=false) {
    // when an XxY resolution image is loaded via the surface command,
    // it becomes an (X-1)x(Y-1)x101 solid image, with a rectangular base.
    // to further complicate things, if the invert option is used,
    // the resulting solid is shifted
    // this module removes the base and corrects for the shifting
    // note: centering isn't supported because I could not find a way of obtaining the image resolution

    translate([0,0,-1])  // shift back down to z=0
    intersection() {
        translate([0,0,invert ? 100:0]) // correct for shifting if inverted
        surface(file = file, invert=invert, convexity=convexity); // make the surface
        translate([0,0,1]) cube([1000,1000,100]); // this cube cuts of the bottom 2 units
    }
}
///////////////////////////////////////////////////////////////////
// functions below from http://www.thingiverse.com/thing:1237203 //
///////////////////////////////////////////////////////////////////

/**** split ****

[vect] split(`str`, `[sep]`)
Returns a vector of substrings by cutting the string `str` each time where `sep` appears.
See also: strcat(), str2vec()

Arguments:
- [str] `str`: The original string.
- [char] `sep`: The separator who cuts the string (" " by default).

Usage:
str = "OpenScad is a free CAD software.";
echo(split(str)); // ["OpenScad", "is", "a", "free", "CAD", "software."]
echo(split(str)[3]); // "free"
echo(split("foo;bar;baz", ";")); // ["foo", "bar", "baz"]
*/
function split(str, sep=" ", i=0, word="", v=[]) =
	i == len(str) ? concat(v, word) :
	str[i] == sep ? split(str, sep, i+1, "", concat(v, word)) :
	split(str, sep, i+1, str(word, str[i]), v);

/**** str2vec ****

[vect] str2vec(`str`)
Returns a vector of chars, corresponding to the string `str`.
See also: split()

Arguments:
- [str] `str`: The original string.

Usage:
echo(str2vec("foo")); // ["f", "o", "o"]
*/
function str2vec(str, v=[], i=0) =
	i == len(str) ? v :
	str2vec(str, concat(v, str[i]), i+1);

/**** substr ****

[str] substr(`str`, `[pos]`, `[len]`)
Returns a substring of a string.

Arguments:
- [str] `str`: The original string.
- [int] `pos` (optional): The substring position (0 by default).
- [int] `len` (optional): The substring length (string length by default).

Usage:
str = "OpenScad is a free CAD software.";
echo(substr(str, 12)); // "a free CAD software."
echo(substr(str, 12, 10)); // "a free CAD"
echo(substr(str, len=8)); // or substr(str, 0, 8); // "OpenScad"
*/
function substr(str, pos=0, len=-1, substr="") =
	len == 0 ? substr :
	len == -1 ? substr(str, pos, len(str)-pos, substr) :
	substr(str, pos+1, len-1, str(substr, str[pos]));
```


[User]
I'd like to design a card holder that can accommodate standard ID-1 cards, and I'd like to be able to customize the back of it with a few different patterns. I'd like it to be parametric so I can adjust the size to fit different cards if I need to in the future.

Specifically, I need three main variations:
1.  A vertical holder with a top bar for a lanyard attachment.
2.  A horizontal holder, also with a top bar for a lanyard.
3.  A shorter vertical version without the top bar, designed for a card with a clip hole.

I'm using a standard card size (53.98mm wide and 85.6mm tall with a thickness around 2mm), but I would like to be able to control these parameters in case I'm using cards with varying thickness, width, and height. I'd also like some tolerances for the card fit. Maybe `horizontal_tolerance` and `vertical_tolerance`.

For the back, I'd like several options:
*   A Voronoi pattern. I'd like control over the thickness, the number of elements, and a bit of rounding. It should also be able to be protruded or recessed. I need to be able to specify a seed value for repeatability, and maybe have some pre-set options, too.
*   A Hacker Emblem, with a size parameter.
*   Customizable text. I'd like to have three lines of text, and adjust size and spacing between the lines. Also the font, and also be able to rotate it.
*   A filled back, with no pattern (or no pattern at all).

For some of the parameters, I'll want to be able to tweak things like the bottom, top, and side thicknesses, the top bar height, the size of any leaf attachments for the base, and any chamfers. And I also need control over the clip hole size and distance from the edge, for both the top bar, and the clip for the cards without the top bar.

Finally, there's an `image_file`, which I think is supposed to be for some surface image, but I'm not sure. I think you should implement that as well, including the `image_depth` and `image_invert` parameters.

So, to recap, I need:
*   Parametric design for card dimensions and tolerances.
*   Three holder variants (vertical with top bar, horizontal with top bar, short vertical without top bar).
*   Customizable back patterns (Voronoi, Hacker Emblem, Text, Filled, None).
*   Various parameters to adjust thickness, hole sizes, and chamfers, etc.

Can you please generate the OpenSCAD files to accomplish this? I don't expect that you would have these pre-written as included libraries - just want to make sure everything is from scratch.

[Assistant]
card-holder.scad:
```
//
// http://www.thingiverse.com/thing:1973679
//
// preview[view:north, tilt:bottom]
//

part = "vertical"; // [vertical:Vertical with top bar,horizontal:Horizontal with top bar,vertical_short:Vertical with clip hole]

card_thickness = 2; // [0:0.1:10]
// ISO/IEC 7810 ID-1 card width
card_width = 53.98;
// ISO/IEC 7810 ID-1 card height
card_height = 85.6;

horizontal_tolerance = 0.5; // [0:0.1:5]
vertical_tolerance = 0.05; // [0:0.01:2]

/* [Back Pattern] */

back_pattern_type = "voronoi"; // [voronoi,hacker_emblem,text,fill,none]
back_pattern_protrudes = "yes"; // [yes,no]

hacker_emblem_size = 35; // [0:100]

/* [Text Pattern Parameters] */

// Up to 3 lines of text
text_line1 = "BLAH!";
text_line2 = "BLAH!";
text_line3 = "BLAH!";
// Additional interval between lines of text
text_line_interval = 5;
text_font = "Anton";
text_size = 12; // [0:100]
text_rotate = "no"; // [no,right,left,down]

/* [Voronoi Pattern Parameters] */

voronoi_thickness = 4; // [0:20]
voronoi_number_of_elements = 20; // [1:200]
voronoi_rounding = 1.5;
// Predefined Voronoi patterns
voronoi_pattern = 0; // [0:Random,-1:Manually entered seed value,-700680,-482985,369411,-433878,-334886,-353855,-861656,22473,50112,324884,-403254,449244,-55987,-140449,-812941,-35685]
// Seed to get repeatable Voronoi pattern
voronoi_seed = 0; // [-999999:999999]

/* [Advanced Parameters] */

bottom_thickness = 1; // [0:0.1:20]
top_thickness = 1; // [0:0.1:20]
side_thickness = 2; // [0:0.1:20]

top_bar_height = 8; // [0:40]

leaf_size = 3; // [0:40]
leaf_length = 12; // [0:40]
leaf_hole_offset = 1.5; // [0:0.1:20]
chamfer = .7; // [0:0.1:5]

top_bar_clip_hole_width = 11; // [0:100]
top_bar_clip_hole_height = 4; // [0:40]
top_bar_vertical_belt_hole_distance = 40; // [0:100]
top_bar_horizontal_belt_hole_distance = 60; // [0:100]

card_clip_hole_width = 13; // [0:100]
card_clip_hole_height = 3; // [0:40]
// Distance from the edge to the clip hole center
card_clip_hole_position = 6; // [0:40]

/* [Hidden] */

image_file = "image-surface.dat"; // [image_surface:100x100]
image_depth = 50; // [0:100]
image_invert = "no"; // [no,yes]

enable_top_bar = (part == "vertical_short") ? false : true;
orientation = (part == "horizontal") ? "horizontal" : "vertical";
hollow_size = (orientation == "horizontal") ?
    [card_height+horizontal_tolerance*2,
        card_width+horizontal_tolerance*2,
        card_thickness+vertical_tolerance*2] :
    [card_width+horizontal_tolerance*2,
        card_height+horizontal_tolerance*2,
        card_thickness+vertical_tolerance*2];
top_bar_belt_hole_distance = (orientation == "horizontal") ?
    top_bar_horizontal_belt_hole_distance :
    top_bar_vertical_belt_hole_distance;

two_side = false;   // Not ready yet

g_seed = voronoi_pattern==0 ?
    floor(rands(-999999, 1000000, 1)[0]) :
    (voronoi_pattern==-1 ?
        voronoi_seed :
        voronoi_pattern);
if (back_pattern_type == "voronoi")
    echo(str("Seed: ", g_seed));

dot = 0.01;
$fn=64;

rotate([0,0,180])
    card_holder();

module leafs() {
    lsize = (orientation == "vertical") ?
        hollow_size : [hollow_size.y,hollow_size.x];
    lrotation = (orientation == "vertical") ? 0 : 90;
    lpos = (orientation == "vertical") ? [0,0] : [hollow_size.x,0];

    translate(lpos) {
        rotate([0,0,lrotation]) {
            translate([0,lsize.y-dot])
                square([leaf_length,dot]);
            translate([0,lsize.y-leaf_length])
                square([dot,leaf_length]);

            translate([0,lsize.y/3-leaf_size])
                square([dot,leaf_length]);

            translate([lsize.x-leaf_length,lsize.y-dot])
                square([leaf_length,dot]);
            translate([lsize.x-dot,lsize.y-leaf_length])
                square([dot,leaf_length]);

            translate([lsize.x-dot,lsize.y/3-leaf_size])
                square([dot,leaf_length]);
        }
    }
}

module grid(step=10, angle=30, size=[40,40], offset=0, width=1)
{
    intersection() {
        square(size);
        for (yy = [offset:step:size.y*2]) {
            ll = size.x/cos(angle) + width*tan(angle);
            echo(ll);
            translate([0,yy])
                rotate([0,0,-angle])
                    translate([-width/2*tan(angle),-width/2])
                        square([ll,width]);
            translate([size.x,yy])
                rotate([0,0,180+angle])
                    translate([-width/2*tan(angle),-width/2])
                        square([ll,width]);
        }
    }
}

module top_hole() {
    offset(r=leaf_size)
    {
        difference() {
            offset(r=-leaf_size)
                square([hollow_size.x,hollow_size.y]);

            if (two_side) {
                translate([0,hollow_size.y/3])
                    offset(r=leaf_size*2) {
                        square([hollow_size.x,dot]);
                        grid(step=20, size=[hollow_size.x,hollow_size.y*2/3], width=dot);
                    }
            } else {
                offset(r=leaf_size*2)
                    leafs();
            }
        }
    }
}

module bottom_hole() {
    if (two_side) {
        step = 20;
        translate([0,hollow_size.y/3]) {
            difference()
            {
                offset(r=-leaf_hole_offset)
                    square([hollow_size.x,hollow_size.y*2/3+step/2]);
                offset(r=-leaf_size) {
                    offset(r=leaf_size*2+leaf_hole_offset) {
                        //translate([0,-step/2])
                        grid(step=step, angle=30, size=[hollow_size.x,hollow_size.y*2/3+step/2], width=dot, offset=step/2);
                    }
                }
            }
        }
    } else {
        intersection() {
            offset(r=-leaf_hole_offset)
                square([hollow_size.x,hollow_size.y]);
            offset(r=-leaf_size)
                offset(r=leaf_size*2+leaf_hole_offset)
                    leafs();
        }
    }
}

module base_holes(for_voronoi=false) {
    if (enable_top_bar) {
        if (!for_voronoi) {
            translate([hollow_size.x/2-top_bar_belt_hole_distance/2,-top_bar_height/2])
                circle(r=top_bar_clip_hole_height/2);
            translate([hollow_size.x/2+top_bar_belt_hole_distance/2,-top_bar_height/2])
                circle(r=top_bar_clip_hole_height/2);
            translate([hollow_size.x/2-top_bar_clip_hole_width/2,-top_bar_height/2]) {
                hull() {
                    circle(r=top_bar_clip_hole_height/2);
                    translate([top_bar_clip_hole_width,0,0])
                        circle(r=top_bar_clip_hole_height/2);
                }
            }
        }
    } else {
        translate([hollow_size.x/2-card_clip_hole_width/2,card_clip_hole_position]) {
            hull() {
                circle(r=card_clip_hole_height/2);
                translate([card_clip_hole_width,0,0])
                    circle(r=card_clip_hole_height/2);
            }
        }
    }
}

module base() {
    offset(r=side_thickness) {
        if (enable_top_bar) {
            translate([0,-top_bar_height+side_thickness])
                square([hollow_size.x,hollow_size.y+top_bar_height-side_thickness]);
        } else {
            square([hollow_size.x,hollow_size.y]);
        }
    }
}

// http://www.catb.org/hacker-emblem/
module hacker_emblem(size=30, grid=true, fused=false, step=100, dia = 80, wall = 5, fuse = 20) {
    hacker_emblem = [[0,0],[1,0],[2,0],[2,1],[1,2]];

    resize([size,size]) {
        translate([-step*3/2,-step*3/2]) {
            for (pos = hacker_emblem)
                translate([(pos[0]+.5)*step,(pos[1]+.5)*step])
                    circle(dia/2);

            if (grid) {
                difference() {
                    union() {
                        for (xx = [0:3])
                            translate([step*xx-wall/2,-wall/2])
                                square([wall,step*3+wall]);
                        for (yy = [0:3])
                            translate([-wall/2,step*yy-wall/2])
                                square([step*3+wall,wall]);
                    }

                    if (fused) {
                        for (xx = [0:2])
                            translate([step*(xx+.5)-fuse/2,-fuse/2-1])
                                square([fuse,step*3+fuse+2]);
                        for (yy = [0:2])
                            translate([-fuse/2-1,step*(yy+.5)-fuse/2])
                                square([step*3+fuse+2,fuse]);
                    }
                }
            }
        }
    }
}

module card_holder() {
    difference() {
        // Chamfered base
        hull() {
            translate([0,0,chamfer*3/2])
                linear_extrude(height=hollow_size.z+bottom_thickness+top_thickness-chamfer*3)
                    base();
            linear_extrude(height=hollow_size.z+bottom_thickness+top_thickness)
                offset(r=-chamfer)
                    base();
        }

        translate([0,0,-.001])
            linear_extrude(height=hollow_size.z+bottom_thickness+top_thickness+.002)
                base_holes();

        translate([0,0,-.001])
            linear_extrude(height=bottom_thickness+.002)
                bottom_hole();
        translate([0,0,bottom_thickness])
            cube([hollow_size.x,hollow_size.y,hollow_size.z]);
        translate([0,0,hollow_size.z+bottom_thickness-.001])
            linear_extrude(height=top_thickness+.002)
                top_hole();

        if (!two_side) {
            logo_thickness = (back_pattern_protrudes == "yes") ?
                bottom_thickness : bottom_thickness/2;
            translate([hollow_size.x/2,(hollow_size.y-(enable_top_bar&&back_pattern_type!="voronoi"&&back_pattern_type!="image"&&back_pattern_type!="none"?top_bar_height:0))/2,-.001]) {
                linear_extrude(height=logo_thickness+.002) {
                    mirror([0,1,0]) {
                        if (back_pattern_type == "hacker_emblem") {
                            hacker_emblem(hacker_emblem_size,grid=false,fused=true);
                        } else if (back_pattern_type == "none") {
                            translate([-hollow_size.x/2,-hollow_size.y/2])
                                offset(-leaf_hole_offset)
                                    square([hollow_size.x,hollow_size.y]);
                        } else if (back_pattern_type == "text") {
                            angle = (text_rotate == "right") ? -90 :
                                (text_rotate == "left") ? 90 :
                                (text_rotate == "down") ? 180 : 0;
                            lines = (text_line3&&text_line2&&text_line1)?2:
                                ((text_line2&&text_line1)?1:0);
                            rotate([0,0,angle]) {
                                translate([0,lines/2*(text_size+text_line_interval)])
                                    text(text=text_line1, size=text_size, font=text_font, halign="center", valign="center");
                                if (lines > 0)
                                    translate([0,(lines/2-1)*(text_size+text_line_interval)])
                                        text(text=text_line2, size=text_size, font=text_font, halign="center", valign="center");
                                if (lines > 1)
                                    translate([0,-lines/2*(text_size+text_line_interval)])
                                        text(text=text_line3, size=text_size, font=text_font, halign="center", valign="center");
                            }
                        } else if (back_pattern_type == "voronoi") {
                            difference() {
                                voronoi_pattern([hollow_size.x-2*leaf_hole_offset,hollow_size.y-2*leaf_hole_offset]);

                                mirror([0,1,0]) {
                                    translate([-hollow_size.x/2,-hollow_size.y/2]) {
                                        offset(voronoi_thickness) {
                                            bottom_hole();
                                            base_holes(for_voronoi=true);
                                        }
                                    }
                                }
                            }
                        } else if (back_pattern_type == "image") {
                            difference() {
                                image([hollow_size.x-2*leaf_hole_offset,hollow_size.y-2*leaf_hole_offset]);

                                mirror([0,1,0]) {
                                    translate([-hollow_size.x/2,-hollow_size.y/2]) {
                                        offset(voronoi_thickness) {
                                            bottom_hole();
                                            base_holes(for_voronoi=true);
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

module voronoi_pattern(size,thickness=voronoi_thickness,round=voronoi_rounding) {
    intersection() {
        square(size,center=true);
        random_voronoi(n = voronoi_number_of_elements, thickness = thickness/2, maxx = size.x, maxy = size.y, seed = g_seed, round = round, nuclei = false);
    }
}

//!image();
module image(size)
{
    projection(cut=true)
        translate([0,0,-0.1/*image_depth/100*/])
            surface(file = image_file, center = true,
                invert = (image_invert=="yes"?true:false));
}

// ------------------------------------------------------
// https://github.com/felipesanches/OpenSCAD_Voronoi_Generator
// (c)2013 Felipe Sanches <juca@members.fsf.org>
// licensed under the terms of the GNU GPL version 3 (or later)

function normalize(v) = v / (sqrt(v[0] * v[0] + v[1] * v[1]));

module voronoi(points, L = 200, thickness = 1, round = 0, nuclei = true) {
	for (p = points) {
		difference() {
			//minkowski() {
				intersection_for(p1 = points){
					if (p != p1) {
						angle = 90 + atan2(p[1] - p1[1], p[0] - p1[0]);

						translate((p + p1) / 2 - normalize(p1 - p) * (thickness + round))
						rotate([0, 0, angle])
						translate([-L, -L])
						square([2 * L, L]);
					}
				}
			//	circle(r = round, $fn = 20);
			//}
			if (nuclei)
				translate(p) circle(r = 1, $fn = 20);
		}
	}
}

module random_voronoi(n = 20, nuclei = true, L = 200, thickness = 1, round = 0, maxx = 100, maxy = 100, seed) {

	// Generate points.
	x = rands(0, maxx, n, seed);
	y = rands(0, maxy, n, seed + 1);
	points = [ for (i = [0 : n - 1]) [x[i], y[i]] ];

	// Center Voronoi.
	offset_x = -(max(x) - min(x)) / 2;
	offset_y = -(max(y) - min(y)) / 2;
	translate([offset_x, offset_y])

	offset(round) offset(-round) voronoi(points, L = L, thickness = thickness, round = 0, nuclei = nuclei);
}

// example with an explicit list of points:
/*point_set = [
	[0, 0], [30, 0], [20, 10], [50, 20], [15, 30], [85, 30], [35, 30], [12, 60],
	[45, 50], [80, 80], [20, -40], [-20, 20], [-15, 10], [-15, 50]
];*/
//voronoi(points = point_set, round = 4, nuclei = true);

// example with randomly generated set of points
//random_voronoi(n = 64, round = 6, maxx = 500, maxy = 100, seed = 42);

```


[User]
Hey, I'm looking to create a customizable street number sign and would like your help generating the OpenSCAD code. I'd like it to be parametric, so I can easily adjust different aspects of the design.

Here’s what I’m envisioning:

*   **Text:** The sign should display a number, and I need to be able to specify the text of that number.
*   **Size:** I need to control the overall height of the sign, and the width should automatically adjust based on the number of digits in the number text. I'd also like to control the aspect ratio, just in case.
*   **Thickness:** There should be separate controls for the thickness of the backplate and the thickness of the raised text and border.
*   **Roundness:**  I want to be able to control the roundness of the corners, from almost square to a circle, using a percentage or similar.
*   **Border:**  The thickness of the border around the sign needs to be adjustable as a percentage of the height.

Ideally, the design should have a rounded border around the entire sign, and the number should be raised from the backplate, as well as the border itself.  I'm planning to make this on a CNC mill but it should be suitable for a 3D printer as well.

Could you create the necessary `.scad` file (or files) for this?  I don't think I need any external libraries for it. Let me know if you have any questions!

[Assistant]
street_number.scad:
```

/* [Text] */

// The number on the sign
number_text = "4";

// the height of the sign in millimeters
height = 150;

/* [Thickness] */

// Thickness of the backplate in mm.
backplate_thickness = 3;

// How much the text and border is raises from backplate
number_thickness = 3;

/* [Fine tuning] */

// Roundness of corners: 0 = almost square, 100 = a circle
corner_roundness = 25; // [0:100]

// Border thickness as percentage of height
border_thickness = 5; // [0:50]

// This should usually not need to be changed
aspect = 1;

/* [Hidden] */
width = (height + height * 0.53 * (len(str(number_text)) - 1)) * aspect;

$fn=100;

border_roundness = corner_roundness / 100;

number_sign();

module anti_round(r){
    difference(){
        square(2*r,center=false);
        circle(r);
    }
}

module rounded_corner(xpos, ypos, dia, degrees) {
    translate([xpos,ypos]) {
	rotate(degrees) difference() {
	    square(dia);
	     anti_round(dia);
	}
    }
}

module rounded_square(height, width, roundness) {
    difference() {
	scale([width/height,1]) square(height);
	square(roundness);
	translate([width-roundness, 0]) square(roundness);
	translate([0, height-roundness]) square(roundness);
	translate([width-roundness, height-roundness]) square(roundness);
    }
    rounded_corner(roundness, roundness, roundness, 180);
    rounded_corner(roundness, height-roundness, roundness, 90);
    rounded_corner(width-roundness, roundness, roundness, 270);
    rounded_corner(width-roundness, height-roundness, roundness, 0);
}

module rounded_border(height, width, roundness, rwidth) {
    minkowski () {
	difference() {
	    rounded_square(height, width, roundness);
	    translate([1,1]) rounded_square(height-2, width-2, roundness);
	}
	circle(rwidth/2);
    }
}

module number_sign() {
    fudge = 0.1;
    color("black") translate([0,0,backplate_thickness-fudge]) {
	linear_extrude(number_thickness + fudge) {
	    rounded_border(height, width, height * border_roundness / 2,
			   height * border_thickness/100);
	    translate([height/5, height/6]) scale(height/14) text(str(number_text));
	}
    }

    color("white")
	linear_extrude(backplate_thickness) {
	minkowski () {
	    rounded_square(height, width, height * border_roundness / 2);
	    circle(height * border_thickness/100/2);
	}
    }
}

```
street_number.scad:
```

/* [Text] */

// The number on the sign
number_text = "4";

// the height of the sign in millimeters
height = 150;

/* [Thickness] */

// Thickness of the backplate in mm.
backplate_thickness = 3;

// How much the text and border is raises from backplate
number_thickness = 3;

/* [Fine tuning] */

// Roundness of corners: 0 = almost square, 100 = a circle
corner_roundness = 25; // [0:100]

// Border thickness as percentage of height
border_thickness = 5; // [0:50]

// This should usually not need to be changed
aspect = 1;

/* [Hidden] */
width = (height + height * 0.53 * (len(str(number_text)) - 1)) * aspect;

$fn=100;

border_roundness = corner_roundness / 100;

number_sign();

module anti_round(r){
    difference(){
        square(2*r,center=false);
        circle(r);
    }
}

module rounded_corner(xpos, ypos, dia, degrees) {
    translate([xpos,ypos]) {
	rotate(degrees) difference() {
	    square(dia);
	     anti_round(dia);
	}
    }
}

module rounded_square(height, width, roundness) {
    difference() {
	scale([width/height,1]) square(height);
	square(roundness);
	translate([width-roundness, 0]) square(roundness);
	translate([0, height-roundness]) square(roundness);
	translate([width-roundness, height-roundness]) square(roundness);
    }
    rounded_corner(roundness, roundness, roundness, 180);
    rounded_corner(roundness, height-roundness, roundness, 90);
    rounded_corner(width-roundness, roundness, roundness, 270);
    rounded_corner(width-roundness, height-roundness, roundness, 0);
}

module rounded_border(height, width, roundness, rwidth) {
    minkowski () {
	difference() {
	    rounded_square(height, width, roundness);
	    translate([1,1]) rounded_square(height-2, width-2, roundness);
	}
	circle(rwidth/2);
    }
}

module number_sign() {
    fudge = 0.1;
    translate([0,0,backplate_thickness-fudge]) {
	linear_extrude(number_thickness + fudge) {
	    rounded_border(height, width, height * border_roundness / 2,
			   height * border_thickness/100);
	    translate([height/5, height/6]) scale(height/14) text(str(number_text));
	}
    }

    linear_extrude(backplate_thickness) {
	minkowski () {
	    rounded_square(height, width, height * border_roundness / 2);
	    circle(height * border_thickness/100/2);
	}
    }
}

```