[User]
Okay, here's what I'm looking for: I want to design a toy double-decker bus using OpenSCAD, and I need your help creating a parametric file. I've been looking at some existing designs, and I really like the one by Alex Franke (CodeCreations), but I'd like something that's a bit more robust and allows for more customization.

Here's a breakdown of what I want the OpenSCAD file to do and what parameters I'd like to control:

**Overall Dimensions & Structure:**

*   **`length`:** The overall length of the bus.
*   **`width`:** The overall width of the bus.
*   **`height`:** The overall height of the bus shell (excluding wheels).
*   **`thickness`:** The thickness of the bus shell material.
*   **`roundRadius`:** The radius of the rounded corners on the bus.
*   **`trimRadius`:** The radius of the trim lines around the shell.
*   **`shellGap`:**  The gap between the chassis and the shell.

**Window & Detail Parameters:**

*   **`windowHeight`:** The height of the windows on the bus.
*   **`stileWidth`:** The width of the vertical stiles between windows. I'd like to be able to control the number of windows per side of the bus, for both the top and bottom. Let's use these parameters:
    * **`topWindows`:** The number of windows on the top level of the bus.
    * **`bottomWindows`:** The number of windows on the bottom level of the bus.
*   **`doorWidth`:** The width of the bus door.
*   **`doorHeight`:** The height of the bus door. The door should be located roughly in the middle of the bus side and should only extend up the first story.
* **`driverSideWindowWidth`**: The width of the window on the driver side (front of the bus.)
* **`driverSideWindowHeight`**: The height of the window on the driver side (front of the bus.)
*   **`frontWindowHeight`**: The height of the front window.
*   **`grillHeight`:** The height of the grill on the front of the bus.
*    **`frontGrillBars`:**  The number of horizontal bars in the grill.

**Wheel & Axle Parameters:**

*   **`wheelDiameter`:** The diameter of the wheels.
*   **`wheelWidth`:** The width of the wheels.
*   **`wheelWellGap`:** The gap between the wheel and the wheel well cutout.
*   **`frontWheelOffset`:** The distance of the front wheels from the front of the bus.
*   **`backWheelOffset`:** The distance of the back wheels from the back of the bus.
*   **`axleDiameter`:** The diameter of the axle.
*   **`axleOpening`:** The inner diameter of the axle housing (pillow block).
*   **`axleClipWidth`:** The width of the axle pillow block that holds the axle.
*   **`axleClipThickness`:** The thickness of material surrounding the axle.
*   **`axleHeight`:** The height of the axle from the bottom of the chassis.

**Chassis & Clip Parameters:**

*   **`baseClipPlay`:** The amount of vertical play in the chassis clips.
*   **`baseClipCatchHeight`:** The distance the clip catch will extend over the chassis.
*   **`baseClipStopHeight`:** The distance the clip will extend over the chassis on the inside.
*   **`baseClipWidth`:** The width of the chassis clips.

**Rendering:**

*   **`$fn`:** A parameter to control curve quality.

**Specific Requests:**

*   I'd like the code to be modular, so I can easily render just the body, the chassis, the wheels, or the assembled bus.
*   The chassis should have proper cutouts for the wheels, as well as the clips for connecting the chassis and the shell.
*   I'd like the file to use comments so I can easily figure out what each section does, and what each variable controls.
*   I need it to include a module that will allow me to plate the bus components for printing.

**Libraries:**

I don't anticipate needing any external libraries for this, so let's keep it to standard OpenSCAD functions.

Basically, I want a comprehensive, parametric OpenSCAD file for a double-decker bus that is robust and customizable. I've given you a lot of specific parameters, but let me know if any of that's unclear, or if you think I've missed anything important. I think that covers all the basics of what I need!

[Assistant]
DoubleDeckerBus_072.scad:
```
/*
 * Double Decker Bus
 *
 * by Alex Franke (CodeCreations), Dec 2012
 * http://www.theFrankes.com
 *
 * Licenced under Creative Commons Attribution - Non-Commercial - Share Alike 3.0
 *
 * INSTRUCTIONS: Choose some values in the "User-defined values" section, render, and print.
 *
 * v0.72, Dec 4, 2012: Fixed some bugs, separated axle diameter and axle through-hole diameter
 * v0.69, Dec 3, 2012: New parameters control wheel well gap and axle clip thickness. Fixed a
 *     couple of bugs.
 * v0.42, Dec 2, 2012: Initial Release.
 *
 * TODO:
 *   * Clean up code.
 */

/////////////////////////////////////////////////////////////////////////////
// User-defined values...
/////////////////////////////////////////////////////////////////////////////

// Size-related properties
length              = 60;   // Length of the bus shell
width               = 20;   // Width of the bus shell
height              = 30;   // Height of the bus shell (does not include wheels)
thickness           = 2.0;  // Thickness of the bus shell

// Shell-related properties
roundRadius         = 4;    // Rounding radius of bus shell
trimRadius          = 0.5;  // Radius of trim lines around shell
windowHeight        = 3.5;  // Height of windows
stileWidth          = 3;    // Width of stiles between windows

// Wheel-related properties
wheelDiameter       = 7;    // Diameter of the wheels
wheelWidth          = 4;    // Width of the wheels
wheelWellGap        = 1;    // Size of gap between wheel and shell
frontWheelOffset    = 4;    // Distance of front wheels from front of bus
backWheelOffset     = 11;   // Distance of back wheels from back of bus

// Chassis-related properties
baseClipPlay        = 0.5;  // Amount of vertical play in the chassis clips
baseClipCatchHeight = 0.75; // Distance the clip catch will extend over the chassis on the bottom
baseClipStopHeight  = 2;    // Distance the clip will extend over the chassis on the inside
baseClipWidth       = 5;    // width of the chassis clips
shellGap            = 1;    // Size of the gap between the chassis and the shell

// Axle assembly-related properties (e.g. axle and pillow blocks)
axleDiameter        = 2.0;  // Diameter of axle
axleOpening         = 2.5;  // Inner diameter of axle housing pillow block
axleClipWidth       = 3;    // Width of the pillow block that holds the axle
axleClipThickness   = 1.25; // Thickness of material surrounding the axle
axleHeight          = 0.5;  // Height of axle from bottom on chassis

$fn                 = 15;   // Overall curve quality

/////////////////////////////////////////////////////////////////////////////
// Calculated values...
/////////////////////////////////////////////////////////////////////////////

wellRadius = wheelDiameter/2+wheelWellGap;

/////////////////////////////////////////////////////////////////////////////
// The code...
/////////////////////////////////////////////////////////////////////////////

busPlate();            // Render all parts, plated and ready for printing
//body();              // Render just the body or shell
//base();              // Render just the chassis
//chassisAndTires();   // Render both the chassis and the wheels
//assembledBus();      // Render the "assembled" bus (useful for debugging)

/////////////////////////////////////////////////////////////////////////////
// Modules... (Don't change this stuff unless you know what you're doing.)
/////////////////////////////////////////////////////////////////////////////

// Render the chassis and wheels only
module chassisAndTires() {

	// Wheels
	translate([-(wheelDiameter*3+6)/2,-(width+wheelDiameter)/2-2,0])
		for( x=[0:3])
			translate([x*(wheelDiameter+2),0,0])
					wheel();

	base();
}

// Render all parts, plated and ready for printing
module busPlate() {

	body();

	// Wheels
	translate([-(wheelDiameter*3+6)/2,-(width+wheelDiameter)/2-2,0])
		for( x=[0:3])
			translate([x*(wheelDiameter+2),0,0])
					wheel();

	translate([0,width+2,0])
		base();
}

// Render the assembled bus (useful for debugging)
module assembledBus() {

	color("FireBrick")
	body();

	translate(0,0,20);

	// Wheels
	color("Black")
	for( x=[length/2-wellRadius-frontWheelOffset,-length/2+wellRadius+backWheelOffset],
		 y=[-1,1])
		translate([x,y*width/2,height])
			rotate([90*y,0,0])
				wheel();

	color("gray")
	translate([0,0,height-thickness-axleDiameter/2-axleHeight])
	base();

}

// The clip that holds the chassis into the shell
module baseClip() {
	translate([0,-baseClipCatchHeight-thickness/2-baseClipPlay/2,-baseClipWidth/2])
	linear_extrude(height=baseClipWidth)
		polygon(points=[
			[0,0],
			[shellGap,0],
			[shellGap+baseClipCatchHeight,baseClipCatchHeight],
			[shellGap,baseClipCatchHeight],
			[shellGap,baseClipCatchHeight+thickness+baseClipPlay],
			[shellGap+baseClipStopHeight,baseClipCatchHeight+thickness+baseClipPlay],
			[0,baseClipCatchHeight+thickness+baseClipPlay+shellGap+baseClipStopHeight]
			]);
}

// A single wheel
module wheel() {
	difference() {
		cylinder(r=wheelDiameter/2, h=wheelWidth);
		translate([0,0,1])
			cylinder(r=axleDiameter/2, h=wheelWidth);
	}
}

// The chassis
module base() {

	l = length-thickness*2-shellGap*2;
	w = width-thickness*2-shellGap*2;

	difference() {
		hull()
			for(i=[-1,1],j=[-1,1])
				translate([((l/2)-roundRadius)*i,((w/2)-roundRadius)*j])
					cylinder(h=thickness, r=roundRadius);

		// wheel cutouts
		for( x=[length/2-wellRadius-frontWheelOffset,-length/2+wellRadius+backWheelOffset],
			 y=[-1,1])
			translate([x,y*(width/2-(wheelWidth)/2),thickness/2])
				cube([wellRadius*2,wheelWidth+shellGap*2,thickness*2], center=true);
	}

	// axle clips
	for( x=[length/2-wellRadius-frontWheelOffset,-length/2+wellRadius+backWheelOffset],
		 y=[-1,1])
		translate([x,y*((width-axleClipWidth)/2 - wheelWidth-shellGap),thickness])
			rotate([90,90,0])
				axleClip();
}

// A pillow block for the axle
module axleClip() {
	translate([-axleOpening/2-axleHeight,0,0])
	difference() {
		union() {
			difference() {
				cylinder(h=axleClipWidth, r=axleOpening/2 + axleClipThickness, center=true);
				translate([ (axleOpening/2 + thickness +1)/2+axleOpening/2,0,0])
					cube([axleOpening/2+thickness+1,axleOpening+thickness*2+1,axleClipWidth+1],
						center=true);
			}

			translate([(axleOpening/2+axleHeight)/2,0,0])
				cube([axleOpening/2+axleHeight, axleOpening*2+thickness*3, axleClipWidth], center=true);
		}

		cylinder(h=axleClipWidth+1, r=axleOpening/2, center=true);
	}
}

// The body (shell) of the bus
module body() {

	windowSize = [(length-stileWidth*3)/6-stileWidth,width+1,windowHeight];
	doorSize = [windowSize[0]*0.70, width+trimRadius*2+1, height/2-wellRadius-trimRadius*3];
	driverSideWindowSize = [windowSize[0]*0.3,doorSize[1],doorSize[2]/2];
	frontWindowSize = [thickness+trimRadius+roundRadius+1,width-roundRadius,doorSize[2]*.75];
	grillHeight = height/2-trimRadius*4-frontWindowSize[2];
	baseClipHeight = height-thickness-axleDiameter/2-axleHeight+thickness/2;

	union() {
		difference() {
			union() {
				shell(length, width, height, roundRadius);

				// Trim
				for (z=[roundRadius, roundRadius+windowSize[2]+trimRadius*2,
					height/2, height/2+windowSize[2]+trimRadius*2, height-trimRadius])
					translate([0,0,z])
						trimH();

				// grill
				translate([length/2,0,height-grillHeight/2-trimRadius*2])
				grill(grillHeight );
			}
			translate([0,0,thickness])
				shell(length-thickness*2, width-thickness*2, height, roundRadius);

			// wheel wells
			translate([length/2-wellRadius-frontWheelOffset,0,height])
				rotate([90,0,0])
					cylinder(h=width+trimRadius*2+1, r=wellRadius, center=true);
			translate([-length/2+wellRadius+backWheelOffset,0,height])
				rotate([90,0,0])
					cylinder(h=width+trimRadius*2+1, r=wellRadius, center=true);

			// Top windows
			translate([-length/2+windowSize[0]/2+ stileWidth*2,0,0])
				for(x=[0:5])
					translate([x*(windowSize[0]+stileWidth),0,roundRadius+trimRadius+windowSize[2]/2])
						cube(windowSize, center=true);

			// Bottom windows
			translate([-length/2+windowSize[0]/2+stileWidth*2+windowSize[0]+stileWidth,0,0])
				for(x=[0:3])
					translate([x*(windowSize[0]+stileWidth),0,height/2+windowSize[2]/2+trimRadius])
						cube(windowSize, center=true);

			// Door
			translate([(length-doorSize[0])/2-roundRadius-stileWidth,0,(doorSize[2]+height)/2+trimRadius])
				cube(doorSize, center=true);

			// Driver Side Window
			translate([(length+driverSideWindowSize[0])/2-roundRadius-trimRadius,
				0,(driverSideWindowSize[2]+height)/2+trimRadius])
				cube(driverSideWindowSize, center=true);

			// Front Window
			translate([length/2,0,(height+frontWindowSize[2])/2+trimRadius])
				cube(frontWindowSize, center=true);

		}

		// Side clips
		for ( x=[length/2-wellRadius-frontWheelOffset-wellRadius-baseClipWidth/2,
					-length/2+wellRadius+backWheelOffset+wellRadius+baseClipWidth/2], y=[-1,1] )
			translate([x,y*(width/2-thickness), baseClipHeight])
				rotate([-90,0,-90*y])
					baseClip();

		// Front/back clips
		for ( x=[-1,1] )
			translate([(length/2-thickness)*x,0,baseClipHeight])
				rotate([-90,0,90+(90*x)])
					baseClip();
	}
}

// The grill
module grill(height) {
	num = floor( (width-(2*roundRadius))/(2*trimRadius) );

	translate([0,-(2*trimRadius*num)/2,-height/2])
	for( y=[0:num] ) {
		translate([0,trimRadius*2*y,0])
		cylinder(r=trimRadius,h=height);
	}
}

// A horizontal piece of trim lines
module trimH() {
	hull() {
		for(i=[-1,1],j=[-1,1]) {
			translate([(length/2-roundRadius)*i,(width/2-roundRadius)*j])
			rotate_extrude()
			translate([roundRadius,0,0])
			circle(r=trimRadius);
		}
	}
}

// The rounded shell shape
module shell(length, width, height, radius) {
	translate([0,0,radius])
	hull() {
		for(i=[-1,1],j=[-1,1]) {
			translate([((length/2)-radius)*i,((width/2)-radius)*j]) {
				sphere(r=radius);
				if ( height>radius*2 ) {
					cylinder(h=height-radius, r=radius);
				}
			}
		}
	}
}
```


[User]
Okay, I'm looking to create a parametric OpenSCAD design for snowflakes, similar to the one I've seen. I really like the idea of generating a large number of unique snowflake designs based on a seed number, like the one I've described, but I'd like some additional options for controlling the snowflake's appearance, and I want it to be a bit more flexible in its structure.

Here are the core requirements:

1.  **Seed-Based Generation:** The design *must* use a seed number to generate all of the random parameters. This way, I can recreate the same snowflake by using the same seed. I don't want true random, I want repeatable pseudo-random.

2.  **Hierarchical Structure:** The snowflake should have a hierarchical, branching structure.  It starts from a central point, extends outward with main arms, and then those arms can have their own branches, and so on. It should look like a real snowflake in how it branches.  I'd like to control the number of branching levels, similar to the depth parameter in the example, as well as the scaling of each level.

3.  **Randomized Branch Parameters:** Each level of the branch should have a random set of parameters:
    *   **Branch Length:** The length of each branch should be random, with a specified range for each level.
    *   **Branch Width:** The width of each branch should also be random, with a specified range for each level.
    *   **Branch Angle:** The angle of the secondary branches relative to the main arm should be random, with a specified range for each level, not just the first one. I would like control over the number of sub-branches per level.
    *   **Branch Shape:** For the branch itself, I'd like more flexibility than just cubes. The branch should be a parametric shape; a rectangle, possibly an ellipse, or even a triangle/polygon.
    *   **Branch Decoration:** I'd like to optionally add decorations at the end of each branch level. These could include hexagons, circles, or even small, randomized “teeth”. Think of the different shapes of snow crystal tips. Ideally these would also be parametric.
    *   **Decoration Shape**: Ability to select a shape for the decorations. Options should include circle, hexagon, diamond, square and triangle.
    *  **Decoration Size**: Ability to vary the size of the decorations on each level with a random range for each level.

4.  **Hexagonal Base:** I like the hexagonal element in the example I provided, and would like this retained. Each branch can optionally have an inner and outer hexagon of random size at each end. The hexagons should also have a solid/hollow option, so I can create filled or outlined hexagons.

5.  **Height Control:**  The height of each snowflake should be parametric and controlled by a global height and a scaling factor for each level as in the example I've provided, but should also allow for the height of the decorations to scale independently.

6.  **No recursion:**  As in the example provided, the design should *not* use recursion (it doesn't work well in OpenSCAD). Instead, use a method to iterate through a fixed number of levels (depth).

7.  **Easy Parameter Adjustment:** I need to be able to easily adjust the parameter ranges for each level of the snowflake (length, width, angle, branch/decoration size, etc.) so I can create a wide variety of snowflakes without having to modify too much code. Ideally, this would be done using simple parameter arrays.

8. **Use of Libraries:**  I'd like to keep the code as simple as possible and don't want to use any complex libraries for this.

Can you help me create an OpenSCAD design with these requirements?  I'm looking for something I can generate thousands of different snowflake designs with. Thanks!

[Assistant]
snowflake.scad:
```
// Parametric Snowflakes
// (c) 2012 Laird Popkin

// Randomly generate snowflakes. The basic approach is to draw six
// radial arms out from the center, then recursively draw arms out from
// the ands of the first arms, and so on. For a random number of
// layers of recursion. Also, randomly draw hexagons.

// Arrays of parameters. Foo[0] is center, [1] is first layer out, [2] is
// second layer, etc.

// Snowflake number
seed=1; //[0:1000000]
echo(str("Seed ",seed));

seeds=rands(0,1000000,7,seed);
echo(str("Seeds ",seeds));

hex = rands(0,1,6,seeds[0]);			// Should this layer have hexagons? >0.5 = yes.
echo("hex ",hex);
hsolid = rands(0,1,6,seeds[1]);		// should hexagons be solid? >0.5 = yes.
echo("hex solid ",hsolid);
hhex = rands(0,1,6,seeds[2]);			// Should there be an inner hexagon? >0.5 = yes.
echo("hhex ",hhex);
length = rands(5,20,6,seeds[3]);		// length of lines for this layer
echo("length ",length);
width = rands(0.2,2,6,seeds[4]);		// width of lines for this layer
echo("width ",width);
angle = rands(60,120,6,seeds[5]);	// angle for arms for next layer
echo("angle ",angle);

depth = rands(1,4,1,,seeds[6])[0];	// number of layers to draw.
echo("depth ",depth);

scaleh=0.8 * 1;						// each layer is 0.9x previous layer height
// Height
height0=2 * 1;						// height of snowflake in mm
height=[height0,height0*scaleh,height0*pow(scaleh,2), height0*pow(scaleh,3), height0*pow(scaleh,4), height0*pow(scaleh,5), height0*pow(scaleh,6)];
//echo("height ",height);

if (hex[0]) drawhex(length[1], height[1], hsolid[1]);

for (angle1 = [0 : 60 : 359]) {	// then six radial arms
	rotate(angle1)arm();
	}

module arm() {
	translate ([0,-width[1]/2,0]) {
		cube([length[1],width[1],height[1]]);
		translate ([length[1],width[1]/2,0]) {
			if (hex[1]>.5) drawhex(length[2], height[2], hsolid[2]);
			if (hhex[1]>.5) drawhex(length[2]/2, height[2], hsolid[2]);
			if (depth>1) {
				rotate(-angle[1]) arm2();
				arm2();
				rotate(angle[1]) arm2();
				}
			}
		}
	}

module arm2() {
	translate ([0,-width[2]/2,0]) {
		cube([length[2],width[2],height[2]]);
		translate ([length[2],width[2]/2,0]) {
			if (hex[2]>.5) drawhex(length[3], height[3], hsolid[3]);
			if (hhex[2]>.5) drawhex(length[3]/2, height[3], hsolid[3]);
			if (depth>2) {
				rotate(-angle[2]) arm3();
				arm3();
				rotate(angle[2]) arm3();
				}
			}
		}
	}

module arm3() {
	translate ([0,-width[3]/2,0]) {
		cube([length[3],width[3],height[3]]);
		translate ([length[3],width[3]/2,0]) {
			if (hex[3]>.5) drawhex(length[4], height[4], hsolid[4]);
			if (hhex[3]>.5) drawhex(length[4]/2, height[4], hsolid[4]);
			if (depth>3) {
				rotate(-angle[3]) arm4();
				arm4();
				rotate(angle[3]) arm4();
				}
			}
		}
	}

module arm4() {
	translate ([0,-width[4]/2,0]) {
		cube([length[4],width[4],height[4]]);
		translate ([length[4],width[4]/2,0]) {
			if (hex[4]>.5) drawhex(length[5], height[5]);
			if (hhex[4]>.5) drawhex(length[5]/2, height[5]);
			}
		}
	}

module drawhex(size, height, s) {
	translate([0,0,height/2]) difference() {
		hexagon(size, height);
		if (s>0.5) translate([0,0,-0.5]) hexagon(size-height, height+1);
		}
	}

// size is the XY plane size, height in Z
module hexagon(size, height) {
	boxWidth = size/1.75;
	for (r = [-60, 0, 60]) rotate([0,0,r])
		cube([boxWidth, size, height], true);
	}

```


[User]
Okay, I need a parametric OpenSCAD file for a calibration object. I want a square base with a circular hole in the center. Think of it as a flat, square puck with a circular cutout.

Here's the specifics:

1.  **Overall Shape:** The base should be a square.
2.  **Hole:** There should be a circular hole cut through the center of the square.
3.  **Parameters:** I need to be able to easily adjust the following:
    *   `size`: The side length of the square.
    *   `height`: The thickness (height) of the square base.
    *   `thick`: The thickness of the wall around the cutout (essentially, the difference between the outer circle and the hole). This should also be used for the border of the square.
4. **Easy-to-Read Code:** I'd like the code to be as easy to understand as possible. I don't need complicated math or tricks, just straightforward constructions that clearly show what's happening.
5. **No External Dependencies:** I'd prefer if you could do this using the standard OpenSCAD primitives and not rely on any external libraries. I would like to keep it as simple as possible.

This object will be used to dial in my printer's settings, so accuracy and precision is important. The circle is particularly useful to see if it comes out round. I've attached the `.scad` code I've tried already, just in case it gives you some more info about what I'm thinking of, but I'd like to see a fresh approach.

[Assistant]
cubeWithCircle.scad:
```
$fa = 0.01;
size = 100;
height= 5;
thick = 5;
union() {
difference()
{
    cube([size,size,height]);
    translate([thick / 2.0,thick/2.0,-10])cube([size-thick,size-thick,height+50]);
}
difference() {
translate([size/2.0,size/2.0,0])cylinder(height,size/2.0,size/2.0);
translate([size/2.0,size/2.0,-10])cylinder(height+20,size/2.0 - thick/2.0,size/2.0 - thick/2.0);
}
};

```


[User]
Okay, I'd like to design a parametric gift tag generator in OpenSCAD. I have a couple of existing files that I'm using as a starting point, which I'll include for reference. I am also using a custom font library, so I'll need to include that. Please note, the font library uses dxf files for the font characters, located in the directory named "fnt-LeagueGothic/". Here's what I want:

**Basic Tag Shape:**

*   The tag should be a rectangle with rounded corners, achieved by subtracting rotated squares from the corners of the base cube.
*   It should have a hole for attaching string, centered along the vertical midpoint on one of the short sides. This should be a cylinder that extrudes through the full depth of the tag.
*   The tag's dimensions (width, height, and depth) should all be parameters.

**Text Integration:**

*   I'm using a custom font, as defined in `OpenScadFont.scad`. The font is loaded using the include command and has a `fnt_str` module.
*   The text itself should be a parameter.
*   The text should be placed horizontally along the center of the tag, using the `fnt_str` module.
*   The scaling of the text should be a parameter (to allow for making it fit), and should not be fixed to a single scale factor in both X and Y dimensions.
*   The height of the text should be a parameter.

**Parametric Behavior:**

*   The text to be rendered, the tag width, tag height, tag depth, letter height, and letter scaling, and hole radius should all be parameters that can be easily changed at the top of the file.
*   I need to be able to easily adjust the horizontal position of the text along the center line.

**File Structure:**

*   I would like a single OpenSCAD file that I can use for this. I don't need the font library included, but it does need to use the `fnt_str` module from `OpenScadFont.scad` (I will ensure it exists in the same directory).
* The file should be clean, well-commented, and easy to modify.

**Libraries:**

*   No external libraries like MCAD, BOSL, etc. are needed besides the OpenSCAD standard library and the included `OpenScadFont.scad` file.

I've included `OpenScadFont.scad` and `gift_tag.scad` files to help demonstrate how the tag is made and how the custom font is implemented. Please use these as a reference. I'm particularly interested in having the text placement and parameters well-organized.

[Assistant]
OpenScadFont.scad:
```

//Variables
fnt_directory="fnt-LeagueGothic/";

//Test module for
module fnt_str(chars,char_count, block_size, height) {
   //Block-size will be effectly ignored for now...may try to do something with it in the future
   char_width=5;
   echo(str("Total Width: ", char_width*char_count, "mm"));

   //Trans
   union() {
     for (count = [0:char_count-1]) {
      translate(v = [5,-2.5+count * char_width, 0])
        rotate([0,0,90]) fnt_char(chars[count], block_size, height);
     }
   }

/*
	vpos = [0,0,0];
	pos = -2.5;
	union() {
//		for (count = [0:char_count-1]) {
		for (count = [0:2]) {
			assign(vpos[0] = char_width(chars[0]), vpos[1] = char_width(chars[1]),vpos[2] = char_width(chars[2]) ) {
		      	translate(v = [5,-2.5+vpos*mvec(count), 0]) rotate([0,0,90]) fnt_char(chars[count], block_size, height);
			}
		}
	}
*/
}

function char_width(char) = 1 - (char=="i")*.5;

function mvec(i) = (i==3) ? [1,1,1] : ((i==2) ? [1,1,0] : ((i==1) ? [1,0,0] : [0,0,0]));

module fnt_char(char, block_size, height, include_base) {
  //TODO: Adjust scaling factors, determine correct "block" size.
   scale_x=8;
   scale_y=8;

  if (char == "0") {
    scale([scale_x,scale_y,0]) linear_extrude(file=str(fnt_directory,"0.dxf"),height=height, convexity=10);
  } else if (char == "1") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"1.dxf"),height=height, convexity=10);
  } else if (char == "2") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"2.dxf"),height=height, convexity=10);
  } else if (char == "3") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"3.dxf"),height=height, convexity=10);
  } else if (char == "4") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"4.dxf"),height=height, convexity=10);
  } else if (char == "5") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"5.dxf"),height=height, convexity=10);
  } else if (char == "6") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"6.dxf"),height=height, convexity=10);
  } else if (char == "7") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"7.dxf"),height=height, convexity=10);
  } else if (char == "8") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"8.dxf"),height=height, convexity=10);
  } else if (char == "9") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"9.dxf"),height=height, convexity=10);
  } else if (char == "a") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"a-lower.dxf"),height=height, convexity=10);
  } else if (char == "A") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"A.dxf"),height=height, convexity=10);
  } else if (char == "&") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"amperstand.dxf"),height=height, convexity=10);
  } else if (char == "*") {
    translate([0,2,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"asterisk.dxf"),height=height, convexity=10);
  } else if (char == "\\") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"backslash.dxf"),height=height, convexity=10);
  } else if (char == "|") {
    translate([1.7,0,0])scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"bar.dxf"),height=height, convexity=10);
  } else if (char == "b") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"b-lower.dxf"),height=height, convexity=10);
  } else if (char == "B") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"B.dxf"),height=height, convexity=10);
  } else if (char == "c") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"c-lower.dxf"),height=height, convexity=10);
  } else if (char == "C") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"C.dxf"),height=height, convexity=10);
  } else if (char == "-") {
    translate([1.7,4,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"dash.dxf"),height=height, convexity=10);
  } else if (char == "d") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"d-lower.dxf"),height=height, convexity=10);
  } else if (char == "D") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"D.dxf"),height=height, convexity=10);
  } else if (char == "$") {
    translate([0,-1.5,0]) scale([scale_x-1,scale_y,0]) linear_extrude(file=str(fnt_directory,"dollarsign.dxf"),height=height, convexity=10);
  } else if (char == ".") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"dot.dxf"),height=height, convexity=10);
  } else if (char == "''") {
    translate([0,6,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"doublequote.dxf"),height=height, convexity=10);
  } else if (char == "=") {
    translate([0,2.5,0]) scale([scale_x-2,scale_y,1]) linear_extrude(file=str(fnt_directory,"=.dxf"),height=height, convexity=10);
  } else if (char == "_") {
    scale([scale_x-2,scale_y,1]) linear_extrude(file=str(fnt_directory,"_.dxf"),height=height, convexity=10);
  } else if (char == ",") {
    translate([0,-1.75,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,",.dxf"),height=height, convexity=10);
  } else if (char == ":") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"colon.dxf"),height=height, convexity=10);
  } else if (char == "!") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"!.dxf"),height=height, convexity=10);
  } else if (char == "(") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"openpar.dxf"),height=height, convexity=10);
  } else if (char == ")") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"closepar.dxf"),height=height, convexity=10);
  } else if (char == "[") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"[.dxf"),height=height, convexity=10);
  } else if (char == "]") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"].dxf"),height=height, convexity=10);
  } else if (char == "@") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"@.dxf"),height=height, convexity=10);
  } else if (char == "#") {
    scale([scale_x-3,scale_y,1]) linear_extrude(file=str(fnt_directory,"#.dxf"),height=height, convexity=10);
  } else if (char == "+") {
    translate([0,2,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"+.dxf"),height=height, convexity=10);
  } else if (char == "e") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"e-lower.dxf"),height=height, convexity=10);
  } else if (char == "E") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"E.dxf"),height=height, convexity=10);
  } else if (char == "f") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"f-lower.dxf"),height=height, convexity=10);
  } else if (char == "F") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"F.dxf"),height=height, convexity=10);
  } else if (char == "/") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"forwardslash.dxf"),height=height, convexity=10);
  } else if (char == "g") {
    translate([0,-3,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"g-lower.dxf"),height=height, convexity=10);
  } else if (char == "G") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"G.dxf"),height=height, convexity=10);
  } else if (char == ">") {
    scale([scale_x-2,scale_y,1]) linear_extrude(file=str(fnt_directory,"greaterthen.dxf"),height=height, convexity=10);
  } else if (char == "h") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"h-lower.dxf"),height=height, convexity=10);
  } else if (char == "H") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"H.dxf"),height=height, convexity=10);
  } else if (char == "i") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"i-lower.dxf"),height=height, convexity=10);
  } else if (char == "I") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"I.dxf"),height=height, convexity=10);
  } else if (char == "j") {
     translate([0,-2.5,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"j-lower.dxf"),height=height, convexity=10);
  } else if (char == "J") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"J.dxf"),height=height, convexity=10);
  } else if (char == "k") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"k-lower.dxf"),height=height, convexity=10);
  } else if (char == "K") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"K.dxf"),height=height, convexity=10);
  } else if (char == "l") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"l-lower.dxf"),height=height, convexity=10);
  } else if (char == "L") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"L.dxf"),height=height, convexity=10);
  } else if (char == "<") {
    scale([scale_x-2,scale_y,1]) linear_extrude(file=str(fnt_directory,"lessthen.dxf"),height=height, convexity=10);
  } else if (char == "m") {
    scale([scale_x-1,scale_y,1]) linear_extrude(file=str(fnt_directory,"m-lower.dxf"),height=height, convexity=10);
  } else if (char == "M") {
    scale([scale_x-1,scale_y,1]) linear_extrude(file=str(fnt_directory,"M.dxf"),height=height, convexity=10);
  } else if (char == "n") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"n-lower.dxf"),height=height, convexity=10);
  } else if (char == "N") {
    scale([scale_x-1,scale_y,1]) linear_extrude(file=str(fnt_directory,"N.dxf"),height=height, convexity=10);
  } else if (char == "o") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"o-lower.dxf"),height=height, convexity=10);
  } else if (char == "O") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"O.dxf"),height=height, convexity=10);
  } else if (char == "p") {
     translate([0,-2.5,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"p-lower.dxf"),height=height, convexity=10);
  } else if (char == "P") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"P.dxf"),height=height, convexity=10);
  } else if (char == "%") {
   scale([scale_x-1.75,scale_y,1]) linear_extrude(file=str(fnt_directory,"percent.dxf"),height=height, convexity=10);
  } else if (char == "q") {
     translate([0,-2.5,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"q-lower.dxf"),height=height, convexity=10);
  } else if (char == "Q") {
     translate([0,-0.5,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"Q.dxf"),height=height, convexity=10);
  } else if (char == "?") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"question.dxf"),height=height, convexity=10);
  } else if (char == "r") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"r-lower.dxf"),height=height, convexity=10);
  } else if (char == "R") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"R.dxf"),height=height, convexity=10);
  } else if (char == "s") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"s-lower.dxf"),height=height, convexity=10);
  } else if (char == "S") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"S.dxf"),height=height, convexity=10);
  } else if (char == "'") {
    translate([0,6,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"singlequote.dxf"),height=height, convexity=10);
  } else if (char == "t") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"t-lower.dxf"),height=height, convexity=10);
  } else if (char == "T") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"T.dxf"),height=height, convexity=10);
  } else if (char == "u") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"u-lower.dxf"),height=height, convexity=10);
  } else if (char == "U") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"U.dxf"),height=height, convexity=10);
  } else if (char == "v") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"v-lower.dxf"),height=height, convexity=10);
  } else if (char == "V") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"V.dxf"),height=height, convexity=10);
  } else if (char == "w") {
    scale([scale_x-1,scale_y,1]) linear_extrude(file=str(fnt_directory,"w-lower.dxf"),height=height, convexity=10);
  } else if (char == "W") {
    scale([scale_x-2,scale_y,1]) linear_extrude(file=str(fnt_directory,"W.dxf"),height=height, convexity=10);
  } else if (char == "x") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"x-lower.dxf"),height=height, convexity=10);
  } else if (char == "X") {
    scale([scale_x-1,scale_y,1]) linear_extrude(file=str(fnt_directory,"X.dxf"),height=height, convexity=10);
  } else if (char == "y") {
     translate([0,-2.5,0]) scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"y-lower.dxf"),height=height, convexity=10);
  } else if (char == "Y") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"Y.dxf"),height=height, convexity=10);
  } else if (char == "z") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"z-lower.dxf"),height=height, convexity=10);
  } else if (char == "Z") {
    scale([scale_x,scale_y,1]) linear_extrude(file=str(fnt_directory,"Z.dxf"),height=height, convexity=10);
  } else {
    echo ("Unknown charachter: ",char);
  }

}

module fnt_test() {
  fnt_str(["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y","Z"],26,1,2);
  translate([15,0,0]) fnt_str(["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"],26,1,2);
  translate([30,0,0]) fnt_str(["0","1","2","3","4","5","6","7","8","9","+","-",":",".",",","?","=","*","!","''","#","$","%","&","@","'"],26,1,2);
  translate([45,0,0]) fnt_str(["(",")","<",">","[","]","/","\\","_","|"],10,1,2);
}

//fnt_test();

```
gift_tag.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.

include <OpenScadFont.scad>;

width = 70;
height = 40;
depth = 2;
letter_height = .75;

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

//Chars, char count, block size, height
//Stacie
//translate([1.3*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 0]) fnt_str(["S","t","a","c","i"],5,8,depth+letter_height);
//translate([1.3*x+32, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 0]) fnt_str(["e"],1,8,depth+letter_height);

//Whitaker
//translate([1.25*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 0]) fnt_str(["W","h","i"],3,8,depth+letter_height);
//translate([1.2*x+18, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["t"],1,8,depth+letter_height);
//translate([1.2*x+24, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["a","k","e","r"],4,8,depth+letter_height);

//Livian
//translate([1.4*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["L","i"],2,8,depth+letter_height);
//translate([1.4*x+11, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["v","i"],2,8,depth+letter_height);
//translate([1.4*x+22, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["a","n"],2,8,depth+letter_height);

//Ian
//translate([2*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["I"],1,8,depth+letter_height);
//translate([2*x+4, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["a","n"],2,8,depth+letter_height);

//Alex
//translate([1.7*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["A","l"],2,8,depth+letter_height);
//translate([1.7*x+11, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["e","x"],2,8,depth+letter_height);

//Wesley
//translate([1.25*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["W"],1,8,depth+letter_height);
//translate([1.25*x+8, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["e","s","l"],3,8,depth+letter_height);
//translate([1.25*x+26, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["e","y"],2,8,depth+letter_height);

//Noah
//translate([1.7*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["N","o","a","h"],5,8,depth+letter_height);

//Lincoln
//translate([1.3*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["L","i"],2,8,depth+letter_height);
//translate([1.3*x+11, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["n","c","o","l"],4,8,depth+letter_height);
//translate([1.3*x+36, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["n"],1,8,depth+letter_height);

//Timmy
//translate([1.4*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["T","i"],2,8,depth+letter_height);
//translate([1.4*x+11, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["m"],1,8,depth+letter_height);
//translate([1.4*x+19, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["m"],1,8,depth+letter_height);
//translate([1.4*x+27, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["y"],1,8,depth+letter_height);

//Missy & Joe
//translate([1.6*x, 3*height/4-3, 0]) rotate([0,0,-90]) scale([1.2, 1.2, 0]) fnt_str(["J","o","e"," ","&"],5,8,depth+letter_height);
//translate([1.6*x+1, height/4+3, 0]) rotate([0,0,-90]) scale([1.2, 1.2, 0]) fnt_str(["M"],1,8,depth+letter_height);
//translate([1.6*x+8, height/4+3, 0]) rotate([0,0,-90]) scale([1.2, 1.2, 0]) fnt_str(["i"],1,8,depth+letter_height);
//translate([1.6*x+11, height/4+3, 0]) rotate([0,0,-90]) scale([1.2, 1.2, 0]) fnt_str(["s","s","y"],3,8,depth+letter_height);

//Mike
//translate([1.6*x+1, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["M"],1,8,depth+letter_height);
//translate([1.6*x+9, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["i"],1,8,depth+letter_height);
//translate([1.6*x+13, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["k","e"],2,8,depth+letter_height);

//Joan
//translate([1.7*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["J","o","a","n"],5,8,depth+letter_height);

//Grandma
translate([1.2*x, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["G","r"],2,8,depth+letter_height);
translate([1.2*x+13, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["a","n","d","m"],4,8,depth+letter_height);
translate([1.2*x+42.5, height/2, 0]) rotate([0,0,-90]) scale([1.4, 1.4, 1]) fnt_str(["a"],1,8,depth+letter_height);

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

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

}

```


[User]
Okay, I'm trying to make a customizable egg shape in OpenSCAD, and I've got a starting point, but it's not quite what I need.

Here's what I have so far:

```scad
egginess = 0; //[-100:100]

egg(curveFactor = (100 + egginess) / 100);

//This makes an egg
//New
//-Fixed egg floating above 0 now sits on 0 like a cylinder

module egg( steps = 60, height = 100, curveFactor = 1, faces = 45 ) {
    a = height;
    b = height * (0.78 * curveFactor);  //Through keen observation I have determined that egginess should be 0.78

    //Equation for the egg curve
    function eggCurve( offset ) = sqrt(
                                  a - b - 2 * offset * step
                                  + sqrt( 4 * b * offset * step + pow(a - b, 2) ) )
                                  * sqrt(offset * step) / sqrt(2);

	step = a / steps;
	union() {
        //This resembles the construction of a UV sphere
        //A series of stacked cylinders with slanted sides
        for( i = [0:steps]) {
		  //echo(i * step);
		  translate( [0, 0, a - ( i + 1 ) * step - 0.01] )
		    cylinder( r1 = eggCurve( i + 1 ),
		              r2 = eggCurve( i ),
		              h = step,
		              $fn = faces );
		}
    }
}
```

This code works, and it produces a decent egg shape, but it has a few limitations:

1.  **Limited Control over the Shape:** I'm using a `curveFactor` that's derived from an `egginess` parameter, but that feels a bit clunky. I'd like more direct control over the shape, perhaps by specifying the radius at different points along the egg's height, or something more intuitive. I am also a little confused by the `0.78` factor in the existing code. I don't fully understand the math, and it might be limiting.
2.  **Fixed Bottom:** The bottom of the egg is a little too flat because of the cylindrical construction, and I'd like it to be able to have a more rounded bottom, too, like a real egg. It'd be nice if it smoothly blends to 0 at the bottom.
3.  **Resolution:** The resolution is currently controlled by the `steps` parameter which is fine, but if there's a more elegant way to control the mesh detail, I'd appreciate that. The code generates faces with `$fn`, but it's only around the cylinder. I would like smoother edges where the cylinders are stacked. Perhaps an overall mesh resolution parameter would be better.

Here's what I'm looking for:

*   **A module that creates an egg shape**.
*   **Parameters to control the height and width of the egg**, maybe as a maximum radius?
*   **A way to control the roundness/pointiness of the top and bottom of the egg**, ideally with parameters that make sense. Like, say, a top and bottom 'roundness' parameter.
*   **A parameter to control the overall resolution/smoothness of the egg**, something that interpolates across all the points rather than just around the cylinder edge.
*   **The ability to create a hollow egg** (specify a shell thickness parameter). It'd be great if this could also handle a rounded bottom edge on the inside, not just a cylinder.
*   **A way to make the egg either stand up or lay down**, without having to rotate the object later. Perhaps an orientation parameter?
*   **I'd also like to see this work with a variety of sizes**, especially smaller eggs.
*   **I want to make sure there is no strange "floating"**, the egg needs to sit nicely on the Z=0 plane.

Ideally, I'd like a solution that is parametric, robust, and relatively efficient.

I'm familiar with the `linear_extrude` and `rotate_extrude` primitives, and I think they could be helpful. I'm also open to any other creative solutions you might have. I am familiar with BOSL, but do not require its use if another solution is better.

Could you provide me with an OpenSCAD file that implements these features?

[Assistant]
egg.scad:
```
egginess = 0; //[-100:100]

egg(curveFactor = (100 + egginess) / 100);

//This makes an egg
//New
//-Fixed egg floating above 0 now sits on 0 like a cylinder

module egg( steps = 60, height = 100, curveFactor = 1, faces = 45 ) {
    a = height;
    b = height * (0.78 * curveFactor);  //Through keen observation I have determined that egginess should be 0.78

    //Equation for the egg curve
    function eggCurve( offset ) = sqrt(
                                  a - b - 2 * offset * step
                                  + sqrt( 4 * b * offset * step + pow(a - b, 2) ) )
                                  * sqrt(offset * step) / sqrt(2);

	step = a / steps;
	union() {
        //This resembles the construction of a UV sphere
        //A series of stacked cylinders with slanted sides
        for( i = [0:steps]) {
		  //echo(i * step);
		  translate( [0, 0, a - ( i + 1 ) * step - 0.01] )
		    cylinder( r1 = eggCurve( i + 1 ),
		              r2 = eggCurve( i ),
		              h = step,
		              $fn = faces );
		}
    }
}
```


[User]
Okay, I need an OpenSCAD design for a tube adapter flange, and I'd like it to be parametric so I can adjust it for different projects. I've seen a design that does this pretty well and would like something similar but with a few more features.

Essentially, I need a flange that can cover a hole of a specified diameter and then transition to a tube with a different diameter. The transition needs to be angled. I need to be able to specify:

*   **Round Radius:** For rounding the corners of the base flange
*   **Material Thickness:** The thickness of the tube walls.
*   **Flange Thickness:** The thickness of the base flange itself
*   **Mounting Hole Distance:** The center-to-center distance between mounting holes (I'll need 4 holes)
*   **Mounting Hole Diameter:** The diameter of the mounting holes
*  **Bolt Head Diameter**: The diameter of the bolt head so that the bolts don't interfere with the tube structure.
*   **Transition Angle:** The angle of the transition between the two tube diameters.
*   **Input Tube Length:** How much the input tube extends straight before the transition.
*   **Input Diameter:** The inner diameter of the input hole.
*   **Output Tube Length:** The length of the output tube after the transition.
*   **Output Diameter:** The inner diameter of the output tube.
*   **Mesh Lines:** The number of lines in an optional grating over the input hole (0 for none).
*   **Mesh Width:** The width of the grating material.
*   **Mesh Height:** The thickness of the grating material.
*   **Optimize Transition Thickness:** A boolean to optimize the transition thickness for FDM printing (making it a bit thinner), or use a consistent thickness
* **Pinch Angle 1:** The angle to pinch the output tube from one side.
* **Pinch Angle 2:** The angle to pinch the output tube from the other side.
* **Tip Cut Radius:** The radius to round the end of the output tube.
* **Tip Cut Inset:** The distance to cut into the end of the output tube to form the rounding.
* **Curve Quality:** A variable that uses `$fn` to define the curve resolution.

The basic shape will be: a flat base flange with rounded corners, four mounting holes, a cylindrical input tube extending straight up, a cone-shaped transition to the output diameter, and a cylindrical output tube. Also, there should be a space cut out around the mounting holes so that the bolt heads don't interfere with the tube structure. If `meshLines` is greater than 0, a grating needs to be included in the base.

The design also needs to include comments and `echo()` statements that output the outer and inner diameter of the output flange, and the total height of the model.

I'm _not_ looking for an example usage of the module, that should be handled entirely by the parametric function in the `.scad` file.

I'm hoping that you can provide me with a fully functional and parametric `.scad` file which I can load into OpenSCAD and generate the models. I don't require any additional libraries to be included.

[Assistant]
TubeAdapterFlange-v1.0.scad:
```
/*
 * Tube Adapter Flange with Grating (Parametric), v1.00
 *
 * by Alex Franke (CodeCreations), Dec 2012
 * http://www.theFrankes.com
 *
 * Licenced under Creative Commons Attribution - Non-Commercial - Share Alike 3.0
 *
 * DESCRIPTION: This allows you to cover a hole with a specific diameter (with optional
 *   grating) and then attach a hose of a different diameter. For example, if you're creating
 *   an exhaust vent for a 40mm fan to push air out through a 1.25-inch tube, then you can
 *   render this file with a 40mm input diameter and a 1.25-inch output diameter. The angle
 *   of the transition is configurable to ensure good prints.
 *
 * INSTRUCTIONS:  Choose some values in the "User-defined values" section, render,
 *   and print. See the comments in that section for details on how to measure.
 *
 * v1.00, Mar 1, 2014: Added pinch angles, flange thickness, end rounding.
 * v0.42, Dec 20, 2012: Initial Release.
 *
 * TODO:
 *   * None at this time
 */

/////////////////////////////////////////////////////////////////////////////
// User-defined values...
/////////////////////////////////////////////////////////////////////////////

roundRadius       = 5;    // The radius of the rounding on the corners
thickness         = 1.7;  // The thickness of the material (tube)
flangeThickness   = 2.0;  // The thickness of the flange
holeDistance      = 32;   // The distance on center between the mounting holes on each side
holeDiameter      = 3.5;  // The diameter of the mounting holes

boltHeadDiameter  = 6;    // The diameter of the bolt head (so it doesn't interfere with the tube)

angle             = 60;   // The angle of the transition between diameters

inputTubeLength   = 3;    // The length the input diameter will extend straight before the transition.
inputDiameter     = 38.5; // The inner diameter (ID) of the input hole
outputLength      = 25;   // The length of the output diameter after the transition.
outputDiameter    = 29.1; // The inner diameter (ID) of the output flange.

meshLines         = 0;    // The number of mesh lines (grates) to render (zero for none)
meshWidth         = 0;    // The width of the mesh material (grates)
meshHeight        = 0;    // The thickness of the mesh material (grates)

optimizeThickness = true; // true to optimize transition thickness for FDM printing (a bit thinner),
                          //   or false for consistent thickness

pinchAngle1       = 90;   // The angle to pinch the output tube from one side
pinchAngle2       = 90;   // ...and from the other side
tipCutRadius      = 0;    // The radius to round in the tip
tipCutInset       = 0;    // The distance to cut into the tip

$fn               = 35;   // general curve quality

silliness         = 0.05; // Allows OpenSCAD to create good models

/////////////////////////////////////////////////////////////////////////////
// Some calculated values and helpful output...
/////////////////////////////////////////////////////////////////////////////

dx = (inputDiameter - outputDiameter)/2;
height = dx*tan(angle);
yOffset = (thickness*tan(angle/2));
xOffset = yOffset*tan(angle);
totalHeight = inputTubeLength + outputLength + height;

echo( str( "Outer diameter of output flange is ", outputDiameter+thickness*2, " mm or ",
	(outputDiameter+thickness*2)/25.4, " in.") );
echo( str( "Inner diameter of output flange is ", outputDiameter, " mm or ",
	outputDiameter/25.4, " in.") );
echo( str( "Total height is ", totalHeight, " mm or ",
	totalHeight/25.4, " in.") );

/////////////////////////////////////////////////////////////////////////////
// The code...
/////////////////////////////////////////////////////////////////////////////

difference() {
	union() {
		translate([0,0,thickness/2])
			base();
		translate([0,0,inputTubeLength/2+thickness])
			lowerTube();
		translate([0,0,thickness+inputTubeLength])
			cone();
	}

	// Carve some space for the mounting bolts.
	translate([0,0,totalHeight/2+flangeThickness+0.5])
	for(x=[-1,1], y=[-1,1]) {
		translate([holeDistance/2*x,holeDistance/2*y,0])
			cylinder(h=totalHeight+1,r=boltHeadDiameter/2, center=true);
	}
}

/////////////////////////////////////////////////////////////////////////////
// The modules...
/////////////////////////////////////////////////////////////////////////////

// Comment out the "module" line and the "}" at the end to use these settings.
// This is likely suitable for connecting a 40mm fan to a 1.25" tube.
module example1() {
	roundRadius       = 5;
	thickness         = 1.7;
	holeDistance      = 32;
	holeDiameter      = 3.5;

	boltHeadDiameter  = 6;

	angle             = 60;

	inputTubeLength   = 3;
	inputDiameter     = 38.5;
	outputLength      = 15;
	outputDiameter    = (1.28*25.4)-thickness*2;

	meshLines         = 0;
	meshWidth         = 0;
	meshHeight        = 0;

	optimizeThickness = true;
}

// Comment out the "module" line and the "}" at the end to use these settings.
// This is likely suitable for connecting a 1.25" tube to cover a 1 1/8" - 1 1/4" hole.
module example2() {
	roundRadius       = 3;
	thickness         = 1.7;
	holeDistance      = 27;
	holeDiameter      = 3.5;

	boltHeadDiameter  = 6;

	angle             = 60;

	inputTubeLength   = 3;
	inputDiameter     = 30;
	outputLength      = 15;
	outputDiameter    = (1.28*25.4)-thickness*2;

	meshLines         = 7;
	meshWidth         = 0.8;
	meshHeight        = 1;

	optimizeThickness = true;
}

// Comment out the "module" line and the "}" at the end to use these settings.
// This is likely suitable for connecting a 80mm fan to a 1 1/4" tube.
module example3() {
	roundRadius       = 3;
	thickness         = 1.7;
	holeDistance      = 71.6;
	holeDiameter      = 3.5;

	boltHeadDiameter  = 6;

	angle             = 60;

	inputTubeLength   = 3;
	inputDiameter     = 76;
	outputLength      = 15;
	outputDiameter    = (1.28*25.4)-thickness*2;

	meshLines         = 0;
	meshWidth         = 0;
	meshHeight        = 0;

	optimizeThickness = true;
}

// Comment out the "module" line and the "}" at the end to use these settings.
// This makes a nice 40mm fan shroud.
module example4() {
	roundRadius       = 3;
	thickness         = 0.5;
 	flangeThickness   = 1;
	holeDistance      = 32;
	holeDiameter      = 3.5;

	boltHeadDiameter  = 6;

	angle             = 68;

	inputTubeLength   = 1;
	inputDiameter     = 37;
	outputLength      = 12;
	outputDiameter    = 14;

	meshLines         = 0;
	meshWidth         = 0;
	meshHeight        = 0;

	optimizeThickness = true;

	pinchAngle1       = 60;
	pinchAngle2       = 70;
	tipCutRadius      = 12;
	tipCutInset       = 1.5;
}

module cone() {

	y = optimizeThickness ? 0 : yOffset;

	difference() {

		union() {
			rotate([0,0,180]) // line up the edges
			rotate_extrude(convexity=5)
			polygon(points=[
				[inputDiameter/2+thickness,0],
				[outputDiameter/2+thickness,height],
				[outputDiameter/2+thickness,height+outputLength],
				[outputDiameter/2,height+outputLength],
				[outputDiameter/2,height-y],
				[inputDiameter/2,0-y]
			]);

			translate([0,0,silliness])
			intersection() {
				union() {
					translate([outputDiameter/2,-(outputDiameter+1)/2,height])
						rotate([0,-90+pinchAngle1,0])
							cube([thickness,outputDiameter+1,outputLength*2]);
					translate([-outputDiameter/2-thickness,-(outputDiameter+1)/2,height])
						rotate([0,90-pinchAngle2,0])
							cube([thickness,outputDiameter+1,outputLength*2]);
				}
				translate([0,0,height+silliness])
					cylinder(h=outputLength, r=outputDiameter/2+silliness);
			}
		}

		// clean up the pinches
		translate([outputDiameter/2+thickness,-(outputDiameter+thickness*2+1)/2,height+silliness])
			rotate([0,-90+pinchAngle1,0])
				cube([outputDiameter,outputDiameter+thickness*2+1,outputLength*2]);
		translate([-outputDiameter/2-thickness,-(outputDiameter+thickness*2+1)/2,height+silliness])
			rotate([0,90-pinchAngle2,0])
				translate([-outputDiameter,0,0])
				cube([outputDiameter,outputDiameter+thickness*2+1,outputLength*2]);

		// Cut a radius into the tip
		translate([0,0,height+outputLength+tipCutRadius-tipCutInset])
			rotate([0,90,0])
				cylinder(r=tipCutRadius, h=outputDiameter+thickness*2+1, center=true);

	}
}

module lowerTube() {
	difference() {
		cylinder(h=inputTubeLength, r=inputDiameter/2+thickness, center=true);
		cylinder(h=inputTubeLength+1, r=inputDiameter/2, center=true);
	}
}

module base() {
	wid = max( inputDiameter + thickness*2, holeDistance + boltHeadDiameter);
	dist = wid/2-roundRadius;
	// meshLines = ( inputDiameter + thickness*2 - meshSize ) / ( meshWidth + meshSize );
	meshDistance = ( wid-meshWidth*meshLines ) / (meshLines+1);

	echo( str( "Mesh hole size ", meshWidth + meshDistance, " mm" ) );

	union() {

		difference() {
			union() {
				for(x=[-1,1], y=[-1,1]) {
					translate([dist*x,dist*y,0])
						cylinder(h=flangeThickness, r=roundRadius, center=true);
				}
				for(r=[0,90]) {
					rotate([0,0,r])
						cube([wid,wid-roundRadius*2,flangeThickness],
							center=true);
				}
			}

			// Mounting holes
			for(x=[-1,1], y=[-1,1]) {
				translate([holeDistance/2*x,holeDistance/2*y,0])
					cylinder(h=flangeThickness+1,r=holeDiameter/2, center=true);
			}

			// Input hole
			cylinder(h=thickness+1,r=inputDiameter/2, center=true);
		}

		// mesh
		if ( meshLines > 0 ) {
			intersection() {
				cylinder(h=thickness+1,r=inputDiameter/2, center=true);

				translate([-wid/2,-wid/2,-thickness/2]) {
					for(x=[0:meshLines-1])
						translate([meshDistance+x*(meshWidth + meshDistance),0,0]) {
							cube([meshWidth,wid,meshHeight]);
						}

					for(y=[0:meshLines-1])
						translate([0,meshDistance+y*(meshWidth + meshDistance),0]) {
							cube([wid,meshWidth,meshHeight]);
						}
				}
			}
		}
	}
}
```


[User]
Okay, I need a custom cable plug for an enclosure, and I want it to be parametric in OpenSCAD. I found this existing design (CablePlug.scad) that's almost exactly what I need, but I'd like to make some changes and ensure it's robust and easy to customize.

The current design has these parameters that I like, and want to keep:

*   `caseHoleDiameter`: The diameter of the hole in the enclosure that the plug will cover.
*   `cableHoleDiameter`: The diameter of the hole in the plug for the cable(s) to pass through.
*   `caseThickness`: The thickness of the enclosure material.
*   `caseOverlap`:  The distance the plug extends beyond the edge of the enclosure hole.
*   `thickness`: The thickness of the main, flat part of the plug.
*   `catchPostThickness`: The thickness of the posts that fit through the enclosure hole.
*   `catchHeight`: The height of the "catch" feature on the posts that holds the plug in place.
*   `catchAngle`: The angle of the "catch" feature.
*   `numberOfCatches`: The number of these posts/catches around the plug.
*   `sliceAngle`: The angle of the empty space between the posts/catches.
*   `$fn`:  For curve quality.

Here's what I'd like to change or add:

1.  **Rounded Edges**: I'd like the edges of the main flat part of the plug, as well as the posts, to have rounded edges. It would be great if I could control the radius of these rounded edges with a parameter, maybe called `roundRadius`. I'd like to use a chamfer instead of a radius. I'm not sure what a good default value would be.
2.  **Cable Hole Shape**: Instead of just a circular hole for the cable, I'd like to be able to choose a different shape. Specifically, I'd like to be able to choose between a circle, an oblong/slot shape, or a rectangular hole.  I'd like to add parameters for an oblong/slot width (`cableSlotWidth`), oblong/slot height (`cableSlotHeight`) and rectangular width (`cableRectWidth`) and rectangle height (`cableRectHeight`) in addition to `cableHoleDiameter`. There should also be a parameter `cableHoleShape` which can be set to "circle", "slot", or "rectangle". If it's set to circle, `cableHoleDiameter` should be used. If it's slot, then `cableSlotWidth` and `cableSlotHeight` should be used. If it's rectangle, then `cableRectWidth` and `cableRectHeight` should be used.
3.  **Tapered Posts:**  Instead of having the catch posts be a constant thickness, I'd like them to taper from `catchPostThickness` where they connect to the plug to a slightly narrower width, perhaps defined by `catchPostTipThickness`, at their tip.
4.  **Clearance:** The cable hole should not touch the posts. Also, I'd like a little extra clearance around the posts, so the plug isn't too difficult to insert. Add a new parameter called `postClearance`.
5.  **Improved Wedge:** The `wedge` module is a little hard to understand, I think. And I think it may have some small errors in the implementation; I'd like to make sure it's correct. Also, I'd like to make it parametric.
6.  **Better Documentation:** I'd like all parameters well commented in the code.
7. **More Descriptive Variable Names:** In general, I'd like the variable names to be more descriptive, for example `stemHeight` should be `postStemHeight`.

Could you generate an OpenSCAD file that incorporates these changes, using the same basic logic and approach as the provided file? Also, I'm already familiar with how to use the `hull()` and `rotate_extrude()` operations, and I'd prefer that the design not use the `offset()` function, if possible. I would like to use the BOSL library.

[Assistant]
CablePlug.scad:
```
/*
 * Cable Plug (Parametric), v0.42
 *
 * by Alex Franke (CodeCreations), Dec 2012
 * http://www.theFrankes.com
 *
 * Licenced under Creative Commons Attribution - Non-Commercial - Share Alike 3.0
 *
 * DESCRIPTION: Covers a larger hole in an enclosure while still providing space for a
 *   cable to fit. This is useful when you need to drill a larger hole in order to fit
 *   the cable ends through the enclosure wall but want to limit the overall size of the
 *   opening.
 *
 * INSTRUCTIONS:  Choose some values in the "User-defined values" section, render,
 *   and print. Change the numberOfCatches and sliceAngle together to control the size
 *   of the catches. See the comments for more details.
 *
 * v0.42, Dec 20, 2012: Initial Release.
 *
 * TODO:
 *   * None at this time.
 */

/////////////////////////////////////////////////////////////////////////////
// User-defined values...
/////////////////////////////////////////////////////////////////////////////

caseHoleDiameter    = 19.05;     // Diameter of the hole to plug
cableHoleDiameter   = 5.4;       // Diameter of the cable(s) taht go through the plug

caseThickness       = 3.5;       // Thickness of the material being plugged
caseOverlap         = 3;         // Distance the plug will overlap the hole opening

thickness           = 1.2;       // Thickness of the flat round portion of the plug

catchPostThickness  = 1.5;       // Thickness of the plug posts that go through the hole
catchHeight         = 1;         // Height of the "catch" portion that holds the plug in place
catchAngle          = 55;        // Angle of the "catch" material that holes the plug in place

numberOfCatches     = 3;         // Number of catches/posts
sliceAngle          = 80;        // The angle of the empty space between catches/posts

$fn                 = 35;        // General curve quality

/////////////////////////////////////////////////////////////////////////////
// The code...
/////////////////////////////////////////////////////////////////////////////

catchYOffset = catchHeight/tan(90-catchAngle);
stemHeight = caseThickness+catchYOffset*2;

difference() {
	union () {
		cylinder(h=thickness, r=caseHoleDiameter/2+caseOverlap);

		translate([0,0,thickness])
		rotate_extrude(convexity=5)
		translate([caseHoleDiameter/2,0,0])
		polygon( points=[
			[-catchPostThickness,0],
			[-catchPostThickness,stemHeight],
			[0,stemHeight],
			[catchHeight,stemHeight-catchYOffset],
			[0,caseThickness],
			[0,0]
			] );
	}

	// Cable hole
	translate([(caseHoleDiameter-cableHoleDiameter)/2,0,-0.5])
		cylinder(h=thickness+stemHeight+1, r=cableHoleDiameter/2);

	// Cable channel
	translate([(caseHoleDiameter-cableHoleDiameter)/2,-cableHoleDiameter/2,-0.5])
		cube([cableHoleDiameter/2+caseOverlap+1,cableHoleDiameter,thickness+stemHeight+1]);

	// Cut catch posts
	translate([0,0,thickness+0.001])
	for( i=[0:numberOfCatches-1] )
		rotate([0,0,i*(360/numberOfCatches)])
			wedge(caseHoleDiameter/2+catchHeight+1,stemHeight+1, sliceAngle);

}

module wedge(length, height, angle) {

	x = length;
	y = 2*x*tan(angle/2);
	z = height;
	x2 = (y/2)/sin(angle/2);

	difference() {
		translate([0,-y/2,0])
			cube([x,y,z]);

		for(i=[-1,1])
			rotate([0,0,angle/2*i])
				translate([0,-y/2 +y/2*i,-0.5])
					cube([x2,y,z+1]);

	}
}
```


[User]
Okay, I'm looking for a way to make rolling pin spacers, but I'd like them to be fully parametric so I can easily adjust them to different rolling pins and dough thicknesses. I've seen a design before that does this, and I'm hoping you can help me create a better version.

The basic idea is to create a spacer that fits over the ends of a rolling pin. This spacer should be a cylinder with a hole in the center to fit over the rolling pin, and a small gap on one side to allow the dough to pass. The important parameters should be:

1.  **Rolling Pin Diameter:** This is the diameter of the rolling pin itself. I need to be able to specify this in millimeters. The spacer hole will be slightly larger than this to allow it to slide on easily.
2.  **Dough Thickness:** This is the desired thickness of the rolled dough, also in millimeters. This determines the height of the cylinder section around the pin.
3. **Spacer Height**: This is how thick the spacers themselves are.
4. **Slant Angle:** I'd like the gap for the dough to be slanted, rather than just a flat cutout. This is for easier rolling action. The angle should be adjustable in degrees.
5. **Gap Width:** This is the width of the gap on the outside of the spacer where the dough passes.
6. **Cylinder Resolution**: I want to be able to control the resolution of the cylinder so it doesn't look too faceted.
7. **Clearance:** I'd like a small, parametric, clearance to be added to the internal diameter of the cylinder to make it easy to slide onto the rolling pin, and allow for slight printer inaccuracies.

I'd like the OpenSCAD file to be fully parameterized, with clear and descriptive comments for each variable. I don't need any fancy text or support structures, and it would be nice if it could be a single object (no groups). I would prefer to avoid libraries if possible, or stick to standard OpenSCAD functions.

Basically, I need something I can easily modify to fit different rolling pin diameters and dough thickness requirements. Please generate the OpenSCAD file for this design.

[Assistant]
rolling_pin_2.scad:
```
// Rolling Pin Spacers
// all measurements are in mm

// Diameter of rolling pin in mm (best if slightly smaller than actual)
pin = 46;
pinr=pin/2;

// How thick you want the dough to be in mm
Dough = 5;

difference () {
   cylinder (h=7,r=pinr+Dough, $fn = 200);
   translate ([0,0,-2]) cylinder (h=14,r=pinr, $fn = 200);
   rotate([30,0,0]) translate ([0,0,-5]) cube([pinr+Dough+2,2,20]);;
}

```


[User]
Okay, I'm looking to design a combination lock, similar to the one I've already made in OpenSCAD, but I want it to be more flexible and robust, and easier to customize. Here's what I'm aiming for:

**Overall Structure:**

*   The lock should be composed of a series of rotating discs, each with a specific number that contributes to the combination.
*   These discs should stack on a central bolt or axis.
*   There will be a final, non-rotating disc that interfaces with a lever or gate mechanism.
*   A holder/base will hold all the discs.
*   A door/faceplate will cover the assembly and will have locking bolts or other mechanisms.
*   A knob will be used to rotate the discs.

**Key Parameters (I need these to be customizable):**

*   **`combination`**:  This should be a list of integers that determines the combination of the lock. The number of discs used should be equal to the length of this list. Each integer in the list should correspond to the position of the notch in each respective disc.
*   **`disc_thickness`**: Thickness of each disc.
*   **`disc_radius`**: Radius of the discs.
*   **`groove_depth`**: Depth of the groove cut into each disc, that will receive the lever.
*    **`disc_distance`**: Distance between each disc, also determines spacing of the lever.
*   **`spacing`**: A small clearance gap for easy printing.
*   **`holder_radius`**: Radius of the central axis that guides the discs.
*   **`peg_distance`**: Distance from the center to the pegs used to hold the discs in place in the base.
*   **`peg_radius`**: Radius of the pegs.
*    **`bolt_radius`**: Radius of the central bolt that passes through the center of everything.
*   **`layer_height`**: The 3D printer layer height, used to make small adjustments for tolerances.
*   **`lever_thickness`**: The overall thickness of the lever.
*    **`knob_radius`**:  The radius of the knob.
*    **`knob_height`**: The height of the knob.
*    **`knob_ticks`**: Number of ticks on the knob to indicate rotation position.
*    **`door_thickness`**: Thickness of the door.

**Disc Details:**

*   Each disc, except for the final one, should have a notch that engages with a lever. The notch position needs to match the corresponding number in the `combination` list.
*   The final disc should have a matching notch that allows the lever to open the lock only when all discs are in the correct position.
*   Each disc should rotate freely on a central bolt or axis.
*   All discs should have some kind of visual indication of their position, for instance an engraved number at the top.

**Lever Details:**

*   The lever should be a solid piece that is guided along the grooves in the discs and interacts with the final disc to open the lock.
*   It should have a small pin that rides on the discs as they rotate.

**Holder Details:**

*   The holder should keep the discs aligned.
*   The holder should also hold pegs that hold the discs in place.

**Door Details:**

*   The door should cover the disc mechanism.
*    The door should have bolts that go into the holder or base to keep it shut.

**Knob Details:**

*   The knob should be on the front, and attach to the central axis.
*  The knob should have visual ticks to show the current rotation position.

**Functional Requirements:**

*   The lock should only open when all the discs are set to the correct positions corresponding to the `combination` list.
*   The design should be printable on a standard FDM 3D printer.
*   The spacing should allow for a degree of error or variations in printer accuracy and tolerances.

**OpenSCAD Library Usage:**

*   I'd like to use the `write()` module from your `WriteScad` library to put numbers on the discs.

**Additional Desires:**

*  It would be nice if the design were configurable for both exploded view, and a single-piece view.

Could you please generate the OpenSCAD code for this parametric combination lock? I want to be able to adjust all of the parameters listed above and have a functional, printable model.

[Assistant]
lock.scad:
```
use <../WriteScad/Write.scad>

combination = [10,20,30,40];

// If zero, render all, otherwise render one part at a time.
part_number=0;

// Make this non-zero for an exploded view
explode_distance=0;

disc_thickness=5;
disc_radius=25;
groove_depth=3;
disc_distance=2;
spacing=0.2;
holder_radius=11;
peg_distance=7;
peg_radius=2.2;
bolt_radius=2.2;
layer_height=0.4;

module render_part(part, x=0) {
  if (part_number == 0 || part_number == part) {
    for (i = [0 : $children-1]) translate([0,0,-x*explode_distance]) child(i);
  }
}

module pie_slice(r, start_angle, end_angle) {
    R = r * sqrt(2) + 1;
    a0 = (4 * start_angle + 0 * end_angle) / 4;
    a1 = (3 * start_angle + 1 * end_angle) / 4;
    a2 = (2 * start_angle + 2 * end_angle) / 4;
    a3 = (1 * start_angle + 3 * end_angle) / 4;
    a4 = (0 * start_angle + 4 * end_angle) / 4;
    if(end_angle > start_angle)
        intersection() {
        circle(r, $fn=200);
        polygon([
            [0,0],
            [R * cos(a0), R * sin(a0)],
            [R * cos(a1), R * sin(a1)],
            [R * cos(a2), R * sin(a2)],
            [R * cos(a3), R * sin(a3)],
            [R * cos(a4), R * sin(a4)],
            [0,0]
       ]);
    }
}

module disc_holder() {
  difference() {
    union() {
      translate([0,0,-disc_distance+spacing]) {
        cylinder(r=15, h=disc_distance-spacing*2, $fn=200);
      }
      translate([0,0,-1]) {
       cylinder(r=holder_radius-spacing, h=disc_thickness + 1, $fn=200);
      }
      for (rot=[0,120,240]) {
        rotate([0,0,rot]) {
          translate([0,peg_distance,disc_thickness]) cylinder(r=peg_radius-spacing, h=3, $fn=64);
        }
      }
    }
    translate([0,0,-disc_distance]) {
      cylinder(r=bolt_radius+spacing, h=disc_distance + disc_thickness + 1, $fn=64);
      for (rot=[0,120,240]) {
        rotate([0,0,rot]) {
          translate([0,peg_distance,0]) cylinder(r=peg_radius, h=5, $fn=64);
        }
      }
    }
  }
}

module disc(disc_num, angle=0, peg=1) {
  difference() {
    cylinder(r=disc_radius, h=disc_thickness, $fn=200);
    translate([disc_radius-8,-3,-1])  rotate([0,180,90])
   write(str(disc_num+1),h=4,t=3, center=true, font="../WriteScad/orbitron.dxf");

    translate([0,0,-1]) cylinder(r=holder_radius, h=disc_thickness+2, $fn=200);
    rotate([0,0,-angle])
    hull() {
      translate([0,disc_radius-1,-1]) {
         cylinder(r=3, h=disc_thickness+2, $fn=20);
      }
      translate([0,disc_radius+8,-1]) {
         cylinder(r=3, h=disc_thickness+ 2, $fn=20);
      }
    }
    translate([0,0,-1]) {
      linear_extrude(height=groove_depth+1)
        difference() {
          pie_slice(19, 0, 340);
          circle(r=15, $fn=200);
        }
    }
  }
  if (peg) {
     translate([0,0,disc_thickness-1])
      linear_extrude(height=groove_depth+disc_distance)
        difference() {
          pie_slice(18, 0, 20);
          circle(r=16, $fn=200);
        }
  }
  if(part_number == 0) translate([0,0,-explode_distance-3]) disc_holder();
}

module final_disc(angle=0) {
  difference() {
    cylinder(r=disc_radius + 0.5, h=disc_thickness, $fn=200);
      translate([0,0,3.2-0.5+layer_height]) cylinder(r=bolt_radius+spacing, h=disc_thickness+2, $fn=200);
   translate([disc_radius-8,-3,-1]) rotate([0,180,90])
     write(str(len(combination)),h=4,t=3, center=true, font="../WriteScad/orbitron.dxf");
    if (0) {
      translate([0,disc_radius * 4/3,-1]) {
         cylinder(r=disc_radius * 1/3 + 4 +spacing*2, h=disc_thickness+2, $fn=200);
      }
    } else {
      rotate([0,0,-angle])
      hull() {
        translate([0,disc_radius-1,-1]) {
           cylinder(r=3, h=disc_thickness+2, $fn=20);
        }
        translate([0,disc_radius+8,-1]) {
           cylinder(r=3, h=disc_thickness+ 2, $fn=20);
        }
      }
    }
    translate([0,0,-0.5]) cylinder(r=(3.5+spacing)/cos(30), h=3.2, $fn=6);
  }
  translate([0,0,disc_thickness-1])
    linear_extrude(height=groove_depth+disc_distance)
      difference() {
        pie_slice(18, 0, 20);
        circle(r=16, $fn=200);
      }
}

lever_thickness=disc_distance * (len(combination)-1) + disc_thickness*len(combination);

module lever() {
  difference() {
    union() {
      hull() {
        translate([0,disc_radius-1.5,-(disc_distance + disc_thickness) * (len(combination)-1)]) {
          cylinder(r=2, h=lever_thickness, $fn=20);
        }
        translate([0,disc_radius+15,-(disc_distance + disc_thickness) * (len(combination)-1)]) {
         cylinder(r=2, h=lever_thickness, $fn=20);
        }
      }
      translate([-5,disc_radius+5,disc_thickness-8]) {
        cube([10,35,8]);
      }
    }
    translate([0,40,0]) cylinder(r=1.5+spacing, h=30, $fn=64);
  }
}

module door() {
  difference() {
    union() {
      translate([-40,disc_radius+35+5-100,disc_thickness+spacing]) {
        cube([80,100,5]);
      }
      translate([-8,disc_radius+5,disc_thickness-11]) {
        cube([16,35,12]);
      }
    }
    translate([-5-spacing/2,0,disc_thickness-8-spacing/2]) {
      cube([10+spacing,135,8+spacing]);
    }
    translate([-5-spacing/2,0,disc_thickness-8-10]) {
      cube([10+spacing,disc_radius+15+2+6,12]);
    }
    cylinder(r=bolt_radius+spacing, h=30, $fn=64);
    hull() {
      translate([0,40,0]) cylinder(r=1.5+spacing*2, h=30, $fn=64);
      translate([0,46,0]) cylinder(r=1.5+spacing*2, h=30, $fn=64);
    }
    translate([-28,0,disc_thickness + 4]) cylinder(r=2, h=20,$fn=3);
    for (rot=[0,120,240]) {
      rotate([0,0,rot]) {
        translate([0,peg_distance,disc_thickness-1]) cylinder(r=peg_radius, h=5, $fn=64);
      }
    }
  }
}

module knob() {
  F=40;
  difference() {
    translate([0,0,disc_thickness + 5 + spacing * 2]) {
      rotate([0,0,4.5]) {
        cylinder(r1=25, r2=25, h=1, $fn=F);
        translate([0,0,0.999]) cylinder(r1=25, r2=10, h=5, $fn=F);
        translate([0,0,5.998]) cylinder(r1=10, r2=8, h=10, $fn=F);
      }
      for (rot=[0:9:359]) {
        rotate([0,0,rot]) {
          translate([0,22,2]) sphere(r=1,$fn=20);
        }
      }
      for (rot=[0:9 * 5:359]) {
        rotate([-17,0,90-rot]) {
           translate([0,15,7.5]) {
#            write(str(rot/9),h=6,t=3, center=true, font="../WriteScad/orbitron.dxf");
           }
        }
      }
    }
    translate([0,0,-1]) cylinder(r=bolt_radius+spacing, h=30, $fn=20);
    translate([0,0,17]) cylinder(r=(3.5+spacing)/cos(30), h=30, $fn=6);
  }
}

for (d=[0:len(combination)-2]) {
  translate([0,0,(-disc_thickness-disc_distance)*d]) {
    render_part(6+d, d * 2 + 1) disc(d, combination[d] * 9 + ((len(combination) - d)%2)*((len(combination) - d - 1)*20), d == 0 ? 0 : 1);
  }
}
translate([0,0,(-disc_thickness-disc_distance)*(len(combination)-1)]) {
  render_part(5, len(combination)*2-1) final_disc(combination[len(combination)-1] * 9);
}
if (part_number == 4) {
  disc_holder();
}
render_part(3, 0) lever();
render_part(2, 0) door();
render_part(1, -1) knob();

```


[User]
Okay, so I've been trying to fix a broken toilet seat hinge with 3D prints, and I'm having some issues. I found a design on Thingiverse (http://www.thingiverse.com/thing:6971) but it broke really quickly. I think part of the problem was that I also used these shims (http://www.thingiverse.com/thing:29107) which, while helpful, ended up putting too much stress on the hinge because the screw holes didn't quite line up perfectly.

I've adjusted my shims, but I also need a more robust hinge. I've started playing with OpenSCAD and put together something that's kind of close but could use some improvement. I'm attaching my current .scad file, "LowerToiletHinge.scad".

Here's what I'm looking for:

I need a parametric OpenSCAD design for a lower toilet seat hinge bracket, something that's designed to be strong but flexible enough to fit different toilet setups. I'm trying to make the hinge itself a little more robust to avoid the breakage issue I was experiencing.

Here's a breakdown of the features and parameters I need:

**General Layout & Dimensions (Relative to the bottom back of the seat):**

*   **Bracket:** This is the flat, mounting part of the hinge.
    *   `BracketWidth`: Width of the bracket.
    *   `BracketLength`: Length of the bracket.
    *   `BracketHeight`: Height (thickness) of the bracket.
*   **Hinge Upright:** This is the vertical section that connects to the seat itself.
    *   `HingeWidth`: Width of the hinge upright.
    *   `HingeLength`: Length of the hinge upright.
    *   `HingeHeight`: Height of the hinge upright.
*   **Hinge Hole:** This is the hole for the hinge pin.
    *   `HingeHoleRadius`: Radius of the hinge hole.
    *   `HingeHoleWallThickness`: Thickness of the material around the hinge hole.
    *   `HingeHoleRoundness`:  A parameter controlling the smoothness of the circle for the hinge hole (smaller value means a smoother circle, but slower rendering). This should be controlled by `$fa`.

*   **Mounting Holes:** These are the screw holes for attaching the hinge to the toilet.
    *   `MountingHoleSize`: Diameter of the mounting holes.
    *   `MountingHoleScrewHeadSize`: Diameter of the countersunk section for screw heads.
    *   `MountingHoleScrewHeadthickness`: Thickness of the countersunk section for screw heads.
    *   `FirstMountingHole`: Distance of the first mounting hole from the back of the bracket.
    *   `DistanceBetweenMountingHole`: Distance between the two mounting holes.
    *   `ScrewHeadRoundness`: This controls the roundness of the countersunk screw hole (lower values give a more circular result, and is controlled by `$fa`).
     *  `ScrewRoundness`: This controls the roundness of the screw hole (lower values give a more circular result, and is controlled by `$fa`).
*   **Reinforcement Pins:** I've added some small pins down the length of the neck to strengthen it.

**Specific Modeling Requests:**

1.  **Rotation for Printing:** The design should be initially modeled so that the bottom bracket is flat on the build plate, and then rotated 90 degrees on the Y-axis (a=[0, -90, 0]) *after* all the shapes are generated to make printing easier. This is very important!
2.  **Countersunk Holes:** The mounting holes should have a countersunk section to allow for the screw heads to sit flush.
3.  **Hinge Hole Placement:** The hinge hole should be centered on the hinge upright with a flat bottom.
4. **Reinforcement:** Use the reinforcement pins on both the flat bracket and the hinge upright, as implemented in my attached file.
5.  **Use `hull()` for the hinge upright.** As used in my attached file, I like the look, but I'm open to suggestions if this isn't the most efficient way to model this.
6.  **Good Defaults:** Please give me reasonable default values for all the parameters in case I'm working from a new toilet design that I haven't measured.
7.  **Modularity/Best Practices:** If you have any suggestions on how to better design the script for readability, maintainability, or potential future modifications I'm happy to hear them!

Could you please generate a fully parametric OpenSCAD file for me? I'm not using any extra libraries beyond what's standard.

[Assistant]
LowerToiletHinge.scad:
```
// Lower Toilet Seat Hinge Bracket
// Designed by Mike Creuzer Dec 30 2012 -  thingiverse@creuzer.com

// measurements are as the part is in use using the bottom back edge of the seat as reference for all measurements
// rotated on its side for printing when done

//Bracket bit

BracketWidth = 13;
BracketLength = 54;
BracketHeight = 7.5;

// Hinge upright bit to center of hinge hole
HingeWidth = BracketWidth;
HingeLength = 9;
HingeHeight = 15;

// Hinge Hole
//Radius
HingeHoleRadius = 5;
HingeHoleWallThickness = 3;
// Smaller number is smoother circle & slower rendering
HingeHoleRoundness = 0.01;

//Mounting Holes
// diameter
MountingHoleSize = 4.5;
// diameter
MountingHoleScrewHeadSize = 9.5;
MountingHoleScrewHeadthickness = 2.5;
FirstMountingHole = 12.75;
DistanceBetweenMountingHole =  18.8;
// smaller is more round. 6 ought to give you a pentagon
ScrewHeadRoundness = 5;
// smaller is more round. 6 ought to give you a pentagon
ScrewRoundness = 2;

rotate(a=[0,-90,0]){ // Rotate to the -90 so the low poly count circles put the angles up for easier printing.

// Make the mounting leg
difference(){
	cube(size = [BracketWidth,BracketLength,BracketHeight], center = false);
	// first hole
	translate(v = [BracketWidth * .5, BracketLength - FirstMountingHole, 0]) cylinder(h=BracketHeight, r=MountingHoleSize/2, $fs=ScrewRoundness);
	translate(v = [BracketWidth * .5, BracketLength - FirstMountingHole, 0]) cylinder(h=MountingHoleScrewHeadthickness, r = MountingHoleScrewHeadSize/2, $fs=ScrewHeadRoundness);
	// second hole
	translate(v = [BracketWidth * .5, BracketLength - FirstMountingHole - DistanceBetweenMountingHole, 0]) cylinder(h=BracketHeight, r=MountingHoleSize/2, $fs=ScrewRoundness);
	translate(v = [BracketWidth * .5, BracketLength - FirstMountingHole - DistanceBetweenMountingHole, 0]) cylinder(h=MountingHoleScrewHeadthickness, r = MountingHoleScrewHeadSize/2, $fs=ScrewHeadRoundness);

	// pin holes for strength
	translate(v = [BracketWidth * .25, BracketLength * .5, BracketHeight * .5]) cube(size = [.1,BracketLength,.1], center = false);
	translate(v = [BracketWidth * .5, BracketLength * .5, BracketHeight * .5]) cube(size = [.1,BracketLength,.1], center = false);
	translate(v = [BracketWidth * .75, BracketLength * .5, BracketHeight * .5]) cube(size = [.1,BracketLength,.1], center = false);
}

// Make the hinge bit
difference() { // Make the hinge bracket, then minus the hole
	hull(){ // Make the hinge bracket all fancy looking
		translate(v = [0, BracketLength, 0]) cube(size = [HingeWidth,HingeLength,HingeHeight], center = false); // The support post
		translate(v = [0, BracketLength +HingeHoleRadius + HingeHoleWallThickness, HingeHeight +BracketHeight]) rotate(a=[0,90,0]) cylinder(h = BracketWidth, r=HingeHoleRadius + HingeHoleWallThickness, center = false, $fa=HingeHoleRoundness); // The round hinge bit
	}

	// The Hinge Hole
	translate(v = [-1, BracketLength +HingeHoleRadius + HingeHoleWallThickness, HingeHeight  + BracketHeight]) rotate(a=[0,90,0]) cylinder(h = BracketWidth*2, r=HingeHoleRadius, center = false, $fa=HingeHoleRoundness);

	// pin holes for strength
	translate(v = [BracketWidth * .25, BracketLength * .5, BracketHeight * .5]) cube(size = [.1,BracketLength,.1], center = false);
	translate(v = [BracketWidth * .5, BracketLength * .5, BracketHeight * .5]) cube(size = [.1,BracketLength,.1], center = false);
	translate(v = [BracketWidth * .75, BracketLength * .5, BracketHeight * .5]) cube(size = [.1,BracketLength,.1], center = false);
}

}
```


[User]
Okay, I'm looking to design a knob for my 3D printer's Z-axis adjustment, and I'd like it to be parametric so I can easily adjust its size and features. I already have an idea of what I want, based on a simple .scad file I've been using, but it's not as flexible as I need.

Here's what I'm aiming for:

**Core Functionality:**

*   **Knob for Z-axis:** It's primary purpose is to easily turn the Z-stop screw on my 3D printer. This means it should have a central hole that slides onto the existing screw.
*   **Parametric Design:** I want to control the knob's dimensions using variables, and it would be great if these variables are easy to understand and use.

**Specific Design Elements & Parameters:**

*   **Total Length (Length):**  I need to be able to specify the total length of the knob (how far it sticks out).
*   **Dial Thickness (Dial):** I need to be able to control the thickness of the dial part of the knob (the top part).
*   **Center Hole Diameter (Hole_Diameter):** I need to control the diameter of the central hole that goes on the adjustment screw. Currently, I'm using a diameter of 4mm for the cylinder that slides onto the adjustment screw but I need to change it to a parameter called `Hole_Diameter`.
*   **Hole Depth (Hole_Depth):** I need a parameter that controls the depth of the hole that will slide onto the adjustment screw. Currently, this is equal to the total length of the knob, but I would like to independently control this.
*   **Optional Top Feature (add):** I would like this to be a choice of either 'none' (just a basic dial), 'pointer' (with a pointer feature on the top), or 'knurled' (with a knurled edge).
    *   **Pointer Feature:** The pointer should be a small triangular extrusion on the top of the dial that makes it easy to visually track how much the knob has been turned. The location of the pointer should also be parametric.
    *   **Knurled Edge:** The knurls should be small cylindrical extrusions around the edge of the dial to increase grip. I need control over the knurl diameter and the number of knurls, as well as the radius at which these knurls are placed.
*   **Fillet Option** I would like an option to add fillets to the top edges of the knob. I would like to be able to control the radius of this fillet.

**Parametric Variables:**

I'd like to be able to specify all the following variables:
*   `Length`: Total length of the knob.
*   `Dial`: Thickness of the dial head.
*   `Hole_Diameter`: Diameter of the center hole.
*   `Hole_Depth`: Depth of the center hole.
*   `add`: Specifies the top feature (none, pointer, or knurled)
*   `Knurl_Diameter`: Diameter of the cylindrical extrusions on the knurled edge.
*  `Knurl_Radius`: Radius from the knob center of the cylindrical extrusions on the knurled edge.
*  `Knurl_Number`: Number of cylindrical extrusions on the knurled edge.
*  `Pointer_Length`: The length of the two sides of the triangular pointer.
*  `Pointer_Offset`: Distance from the knob center of the triangular pointer (both x and y).
*   `Fillet_Radius`: Radius of the fillet on the top of the knob.

**OpenSCAD Libraries:**

I would prefer you not to use any external libraries.

Essentially, I want a fully parametric version of this simple knob that can be easily customized to different printer setups. Please let me know if you need any more information, and thank you for your help!

[Assistant]
knob_parametric.scad:
```
// knob for z axis

$fn=5*10;

//Total Dial Length mm
Length=65;

//Thickness of the dial head in mm
Dial=3;

// Knob add ons
add ="pointer"; //[none,pointer,knurled]

cylinder(h=Dial,r=10);

if (add=="knurled")
{
  for ( i = [0 : 10] )
  {
      translate([sin(i*36)*9,cos(i*36)*9, 0]) cylinder(h=Dial,r=3);
  }
}

if (add=="pointer")
{
    translate([-9,-9,0]) linear_extrude(height=Dial) polygon(points=[[0,0],[7,0],[0,7]], paths=[[0,1,2]]);
}

difference () {
cylinder(h=Length,r=4);
translate([0,0,Length-15]) cylinder(h=20,r=1.5);
}
```