[User]
Hey, I'm looking to design a parametric fan adapter in OpenSCAD and could use some help. I have a few specific requirements and have seen a design that does most of it but the code could be improved upon (I can show you it if needed).

Essentially, I need an adapter that can connect two different sized fans, with a manifold elbow allowing for angled airflow. Here are the key parameters I'd like to control:

*   **Fan Dimensions:**
    *   Diameter of fan 1
    *   Distance between screw holes for fan 1
    *   Screw hole diameter for fan 1
    *   Diameter of fan 2
    *   Distance between screw holes for fan 2
    *   Screw hole diameter for fan 2
*   **Manifold/Elbow:**
    *   Elbow angle for the manifold
    *   Z-axis rotation angle of the manifold elbow
    *   Length from fan 1 to the manifold elbow
    *   Cone angle of the larger fan's connection (should affect the length of the cone)
    *   Length of the cone from the elbow to fan 2 plate
*   **General:**
    *   Wall thickness
    *   Pipe reduction ratio (relative to fan 1 diameter)
    *   Angle factor (for internal calculations of the elbow)
    *   Resolution of curves (using `$fn`)

The design should include:

*   **Fan Plates:** Each fan should have a mounting plate with screw holes.
*   **Pipes/Cones:** The airflow should transition smoothly between the two fans, including a cone if there is a diameter change.
*   **Manifold Elbow:** The manifold should be rotatable around the z-axis as well as able to have its angle set.
*   **Internal:** Should have no internal ledges where flow can be disrupted by the wall thickness.

I'm aiming for a design that is robust and easy to customize for different fan combinations. Could you generate an OpenSCAD file that includes the necessary modules and implements these parametric features? I'm not using any special libraries or anything, just standard OpenSCAD stuff. Let me know if I need to provide any more info!

[Assistant]
variable_fan_adapter.scad:
```
// A configurable fan size adapter
// Create by : Sherif Eid
// sherif.eid@gmail.com

// v 1.0.4  : cleaned code, unified all in one file
// v 1.0.3  : added cone angle for the larger fan
// v 1.0.2  : fixed bug in sizing the fan plates
// v 1.0.1  : fixed output fan cone to tube size, increased size of fan opening
// v 1.0    : first release

// Here goes design variables, dimensions are in mm

// fans' parameters
// wall thickness
t_wall = 4;
// fan 1: diameter
d_fan1 = 30;
// fan 1: distance between screw openings
ls_fan1 = 24;
// fan 1: screw openings' diameter
ds_fan1 = 3.4;
// fan 2: diameter
d_fan2 = 60;
// fan 2: distance between screw openings
ls_fan2 = 52;
// fan 2: screw opening diameters
ds_fan2 = 4.3;

// larger fan cone parameters
// length to manifold elbow
l_mani1 = 5;
// cone angle
a_cone = 100;
// length to manifold elbow
l_mani2 = round(d_fan2/(2*tan(a_cone/2)));

// manifold parameters
// manifold angle
a_mani = 45;
// z-axis rotation angle of the manifold elbow
az_mani = 20;
// internal parameters
// pipe reduction ratio relative to fan 1 diameter
n_pipe = 1;
// angle factor
n_angle = 0.501;

// other advanced variables
// used to control the resolution of all arcs
$fn = 50;

// modules library
module fanplate(d,ls,t,ds)
{
    /*
    d   : diameter of the fan
    ls  : distance between screws
    t   : wall thickness
    ds  : diameter of screws
    */
    difference()
    {
        difference()
        {
            difference()
            {
                difference()
                {
                    //translate([d*0.1+d/-2,d*0.1+d/-2,0]) minkowski()
                    translate([-0.45*d,-0.45*d,0]) minkowski()
                        {
                         //cube([d-2*d*0.1,d-2*d*0.1,t/2]);
                         cube([d*0.9,d*0.9,t/2]);
                         cylinder(h=t/2,r=d*0.05);
                        }
                    translate([ls/2,ls/2,0]) cylinder(d=ds,h=t);
                }
                translate([ls/-2,ls/2,0]) cylinder(d=ds,h=t);
            }
            translate([ls/-2,ls/-2,0]) cylinder(d=ds,h=t);
        }
        translate([ls/2,ls/-2,0]) cylinder(d=ds,h=t);
    }
}

module mani_elbow(a,d,t)
{
    // this is the manifold elbow
    // a  : angle of the elbow
    // d  : diameter of the elbow
    // t  : wall thickness

    translate([-1*n_angle*d,0,0]) rotate([-90,0,0]) difference()
    {
        difference()
        {
            difference()
            {
                rotate_extrude() translate([n_angle*d,0,0]) circle(r = d/2);
                rotate_extrude() translate([n_angle*d,0,0]) circle(r = (d-2*t)/2);
            }
            translate([-2*d,0,-2*d]) cube([4*d,4*d,4*d]);
        }
        rotate([0,0,90-a]) translate([-4*d,-2*d,-2*d]) cube([4*d,4*d,4*d]);
    }
}

// body code goes here

difference() // fan 1 plate + pipe
{
    union()
    {
        fanplate(d=d_fan1,ds=ds_fan1,t=t_wall,ls=ls_fan1);  // fan 1 plate
        cylinder(d=n_pipe*d_fan1,h=l_mani1+t_wall);    // fan 1 pipe length
    }
    cylinder(d=n_pipe*d_fan1-2*t_wall,h=l_mani1+t_wall);
}

// elbow, cone and second fan plate
rotate([0,0,az_mani]) union() {
    translate([0,0,l_mani1+t_wall]) mani_elbow(d=n_pipe*d_fan1,a=a_mani,t=t_wall);
    translate([n_pipe*n_angle*d_fan1*(cos(a_mani)-1),0,t_wall+l_mani1+n_pipe*n_angle*d_fan1*sin(a_mani)]) rotate([0,-1*a_mani,0]) difference()
    {
        union()
        {
            cylinder(d1=n_pipe*d_fan1,d2=n_pipe*d_fan2,l_mani2);
            translate([0,0,l_mani2]) fanplate(d=d_fan2,ds=ds_fan2,t=t_wall,ls=ls_fan2);  // fan 2 plate
        }
        cylinder(d1=n_pipe*d_fan1-2*t_wall,d2=n_pipe*d_fan2-2*t_wall,l_mani2+t_wall);
    }
}

```


[User]
I'd like a parametric battery holder design, similar to the one I found on Thingiverse, but I want to make sure I can easily customize it for a wider variety of battery types and mounting options. The original design was good, but I think it can be improved to be more general.

Here's what I'm looking for:

*   **Battery Support:** I need the design to be able to handle cylindrical batteries of varying diameters and lengths. I’d like to specify the diameter, length, and button height (the little nub on the positive side) as parameters. I'd like it to work for AA, 18650, and 16340 batteries as a starting point, but also allow the user to specify their own custom size. I'd also like to specify a clearance value (e.g. 0.5mm or 1mm) so that the battery is not a tight fit.
*   **Cell Count:** The design should allow a variable number of cells in a single row.
*   **Polarization:** Like the original design, the battery holders need to be polarized so that the negative side can’t touch the positive contact.
*   **Spring Clips:** The design should accommodate the Keystone 1107-1 battery clips (or, even better, make it easy to adapt to other clips too). I need to be able to specify the dimensions of the clip: width, how far it extends below the center of the battery, above, how much it is compressed, and how much it is uncompressed. I need to be able to specify the width of the tab on the clip.
*   **Mounting:** I need mounting holes that can be placed at custom X and Y distances from the center of the battery holder. I'd like to specify the size of the mounting hole, and the option to have counterbores for screws of a given size.
*   **Polarity Indicators:** Just like in the original design, I want clear positive and negative indicators for each battery slot. I would also like the ability to control the marking size and position.
*   **Material Thickness:** I want to be able to specify a minimum wall thickness for the holder itself. I would like all of the walls of the holder to be the same thickness, where possible.
*   **Battery Removal:** There should be cutouts to make removing the batteries easier, like the original design. I would like to be able to adjust the height and width of these cutouts.
* **Libraries:** I'd like to use the BOSL2 library for any standard shapes/functions that may be useful.

I think that covers it. Let me know if you need any clarification, or think I'm missing something.

[Assistant]
polarized_battery_box.scad:
```
/* Created by Heindal at Thingiverse and inspired by the design by flummer

User Variables - Change to fit your battery
 */
// Number of batteries
Cell_Count = 2; // [1:6]

// Battery Size
Battery_Size = 0; // [0:AA, 1:16340 lithium, 2:18650 lithium]

// Distance between mounting holes
Mount_Hole_X_Spacing = 40; // [30:60]

/* [Hidden] */
// for the customizer - please edit here for custom values
// Overall length including positive button
Length_Options = [50,37.4,71];
Battery_Length = Length_Options[Battery_Size]; // [37.4:xx340 lithium, 50:AA, 71:xx650 lithium]

// Diameter of the body of the battery plus 1mm for clearance
Dia_Options = [15,17,19];
Battery_Dia = Dia_Options[Battery_Size];// [15:AA, 17:16xxx lithium, 19:18xxx lithium]

// Diameter of the positive side button at the base
Button_Dia = 8; // [8:AA and 18650 and 16340, 17:26650]

// Height of the button - 0.8 works for most everything
Button_Height = 0.8;

/*
Fixed and Calculated Dimensions - alter at your own risk
*/
//clip dimensions for Keystone 1107-1
Clip_Width = 7; //overall width of clip
Clip_Below_Center = 10; //distance inserted part of clip extends below center of the battery
Clip_Above_Center = 5;
Clip_Compressed = 3;
Clip_Uncompressed = 4-0.5;
Tab_Width = 4;
// Dimensions of holder
Mid_Height = Battery_Dia/2+2;
Mid_End_Height = Mid_Height + Clip_Above_Center;
End_Height = Mid_Height + Battery_Dia/2;

module battery_box(cells)
{
union ()
	{
				// polarizing tabs for positive terminal
	for (i=[0:(cells-1)])
		{
		if (i%2 == 0) { // is even
			translate([Battery_Length/2+Clip_Compressed-(Clip_Uncompressed+Button_Height)/2, -(cells-1)*Battery_Dia/2+i*Battery_Dia+(Button_Dia+Battery_Dia)/4, Mid_End_Height/2])
				cube(size=[(Clip_Uncompressed+Button_Height), (Battery_Dia-Button_Dia)/2, Mid_End_Height], center=true);
			translate([Battery_Length/2+Clip_Compressed-(Clip_Uncompressed+Button_Height)/2, -(cells-1)*Battery_Dia/2+i*Battery_Dia-(Button_Dia+Battery_Dia)/4, Mid_End_Height/2])
				cube(size=[(Clip_Uncompressed+Button_Height), (Battery_Dia-Button_Dia)/2, Mid_End_Height], center=true);
		}
		else { // if odd flip to the other side of the holder
			translate([-Battery_Length/2-Clip_Compressed+(Clip_Uncompressed+Button_Height)/2, -(cells-1)*Battery_Dia/2+i*Battery_Dia+(Button_Dia+Battery_Dia)/4, Mid_End_Height/2])
				cube(size=[(Clip_Uncompressed+Button_Height), (Battery_Dia-Button_Dia)/2, Mid_End_Height], center=true);
			translate([-Battery_Length/2-Clip_Compressed+(Clip_Uncompressed+Button_Height)/2, -(cells-1)*Battery_Dia/2+i*Battery_Dia-(Button_Dia+Battery_Dia)/4, Mid_End_Height/2])
				cube(size=[(Clip_Uncompressed+Button_Height), (Battery_Dia-Button_Dia)/2, Mid_End_Height], center=true);
		}
		}

	difference()
	{
		union()
		{	// body of battery holder
			translate([0, 0, Mid_Height/2])
				cube(size=[Battery_Length+2*(Clip_Compressed-1.5+4), Battery_Dia*cells+2, Mid_Height], center=true);

			translate([Battery_Length/2+(Clip_Compressed-1.5)+2+2/2, 0, End_Height/2])
				cube(size=[2, Battery_Dia*cells+2, End_Height], center=true);

			translate([-(Battery_Length/2+(Clip_Compressed-1.5)+2+2/2), 0, End_Height/2])
				cube(size=[2, Battery_Dia*cells+2, End_Height], center=true);

			translate([-(Battery_Length/2+(Clip_Compressed-1.5)+2/2), 0, Mid_End_Height/2])
				cube(size=[2, Battery_Dia*cells+2, Mid_End_Height], center=true);

			translate([(Battery_Length/2+(Clip_Compressed-1.5)+2/2), 0, Mid_End_Height/2])
				cube(size=[2, Battery_Dia*cells+2, Mid_End_Height], center=true);

			// mounting flanges
			translate([Mount_Hole_X_Spacing/2, cells*Battery_Dia/2+4/2, 3/2])
				cube(size=[7, 4, 3], center=true);

			translate([Mount_Hole_X_Spacing/2, cells*Battery_Dia/2+4, 3/2])
				cylinder(r=7/2, h=3, center=true, $fn = 60);

			translate([-Mount_Hole_X_Spacing/2, cells*Battery_Dia/2+4/2, 3/2])
				cube(size=[7, 4, 3], center=true);

			translate([-Mount_Hole_X_Spacing/2, cells*Battery_Dia/2+4, 3/2])
				cylinder(r=7/2, h=3, center=true, $fn = 60);

			translate([Mount_Hole_X_Spacing/2, -(cells*Battery_Dia/2+4/2), 3/2])
				cube(size=[7, 4, 3], center=true);

			translate([Mount_Hole_X_Spacing/2, -(cells*Battery_Dia/2+4), 3/2])
				cylinder(r=7/2, h=3, center=true, $fn = 60);

			translate([-Mount_Hole_X_Spacing/2, -(cells*Battery_Dia/2+4/2), 3/2])
				cube(size=[7, 4, 3], center=true);

			translate([-Mount_Hole_X_Spacing/2, -(cells*Battery_Dia/2+4), 3/2])
				cylinder(r=7/2, h=3, center=true, $fn = 60);
		}

		for (i=[0:cells-1])
		{
			// battery cradle
			translate([0, -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_Height])
			rotate(90, [0, 1, 0])
				cylinder(r=Battery_Dia/2-0.01, h=Battery_Length+2*(Clip_Compressed-1.5), center=true, $fn = 100);

			// spring cut-out
			translate([Battery_Length/2+Clip_Compressed, -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_End_Height/2])
				cube(size=[1, Clip_Width, 30], center=true);

			translate([Battery_Length/2+Clip_Compressed+10/2, -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_Height+30/2])
				cube(size=[10, Tab_Width, 30], center=true);

			translate([-(Battery_Length/2+Clip_Compressed), -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_Height])
				cube(size=[1, Clip_Width, 30], center=true);

			translate([-(Battery_Length/2+Clip_Compressed+10/2), -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_Height+30/2])
				cube(size=[10, Tab_Width, 30], center=true);
		if (i%2 == 0 ) { // is even
	// polarity marking (+)
			translate([2*Battery_Length/5, -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_Height-Battery_Dia/2+1.25])
				cube(size=[6, 2, 4], center=true);

			translate([2*Battery_Length/5, -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_Height-Battery_Dia/2+1.25])
				cube(size=[2, 6, 4], center=true);

			// polarity marking (-)
			translate([-2*Battery_Length/5, -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_Height-Battery_Dia/2+1.25])
				cube(size=[6, 2, 4], center=true);
		}
		else { // if odd switch to opposite side
	// polarity marking (+)
			translate([-2*Battery_Length/5, -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_Height-Battery_Dia/2+1.25])
				cube(size=[6, 2, 4], center=true);

			translate([-2*Battery_Length/5, -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_Height-Battery_Dia/2+1.25])
				cube(size=[2, 6, 4], center=true);

			// polarity marking (-)
			translate([2*Battery_Length/5, -cells*Battery_Dia/2+Battery_Dia/2+Battery_Dia*i, Mid_Height-Battery_Dia/2+1.25])
				cube(size=[6, 2, 4], center=true);
		}

		}

		// mounting holes
		translate([Mount_Hole_X_Spacing/2, cells*Battery_Dia/2+4, 3/2])
			cylinder(r=3.3/2, h=4, center=true, $fn = 30);

		translate([-Mount_Hole_X_Spacing/2, cells*Battery_Dia/2+4, 3/2])
			cylinder(r=3.3/2, h=4, center=true, $fn = 30);

		translate([Mount_Hole_X_Spacing/2, -(cells*Battery_Dia/2+4), 3/2])
			cylinder(r=3.3/2, h=4, center=true, $fn = 30);

		translate([-Mount_Hole_X_Spacing/2, -(cells*Battery_Dia/2+4), 3/2])
			cylinder(r=3.3/2, h=4, center=true, $fn = 30);

		// cutout to ease battery removal
		translate([0, 0, End_Height/2+Mid_Height/2])
		rotate(90, [1, 0, 0])
			cylinder(r=End_Height/2, h=cells*Battery_Dia+5, center=true, $fn = 100);

		}
	}
}

battery_box(Cell_Count);
```


[User]
Okay, I'm looking for an OpenSCAD design for a customizable rack, similar to the one I found on Thingiverse (thing:736445). I need it to be parametric so I can easily change the dimensions and the number of holes.

Specifically, I need to be able to specify:

*   **Hole Shape:** Either round or square holes.
*   **Hole Size:** The diameter (for round holes) or side length (for square holes).
*   **Hole Depth:** How deep the holes should be.
*   **Rows and Columns:** The number of rows and columns of holes in the rack.
*   **Spacing:** The space between the holes.
*   **Bottom Thickness:** The thickness of the base of the rack.
*   **Skid Height:** The height of the small feet that raise the rack off the surface.
*   **Skid Diameter:** The diameter of those feet.
*   **Wall Thickness:** The thickness of the overall structure that surrounds all the holes (not the thickness of the base).
*  **Material Holes:** A toggle to include smaller through-holes to reduce material usage (yes/no).
*  **Material Hole Size:** The size of the through-holes (if enabled).

I'd like the design to have:
   * Rounded corners for the main body to prevent splitting
   * The material saving through-holes should be placed between the main holes.
   *  Skids/feet at the corners to prevent curling during printing, so there needs to be one at all four corners.

I don't think I need any specific libraries. I'd like a single .scad file that I can easily use in OpenSCAD.

[Assistant]
customized_rack.scad:
```
//design and code by emanresu (http://www.thingiverse.com/Emanresu)
//This code generates a rack with round or square holes.

/* [Global] */

//round or square holes?
hole_shape=1; //[1:Round,0:Square]
//length of edge/diameter if square/round holes (mm)
hole_size=10;
//depth of hole (mm)
hole_depth=12;
//number of rows along the x axis
rows=6;
//number of columns along the y axis
columns=4;
//space between holes (mm)
spacing=1.6;
//thickness of bottom layer (mm)
bottom_thick=1.75;
//height of skids (mm)
skid_height=0.5;
//diameter of skids (mm)
skid_diameter=20;
//wall thickness (mm)
wall_thickness=5;
//material-saving through holes?
material_holes_on=1; //[1:Yes, 0:No]
//material-saving hole size (mm)
material_hole_size=1.5;

//set openSCAD resolution
$fa=1;
$fs=1;

module holes(hole_shape,hole_size,hole_depth,rows,columns,spacing,bottom_thick) {
	//This module generates an array of holes with one corner at the origin
	//moves the array of holes to be alligned with a non-centered cube later
	//moves corner of array to origin, raises holes by bottom_thick
	translate([hole_size/2+spacing, hole_size/2+spacing, hole_depth/2+bottom_thick+0.5]) {
		//generating rows and columns of holes
		//columns are Y axis
		for (b=[0:columns-1]) {
			//rows are X axis
			for (i=[0:rows-1]) {
				translate([i*(hole_size+spacing), b*(hole_size+spacing), 0]) {
					//square or round holes?
					//value of 1 = circles
					if (hole_shape==1) {
						cylinder(r=hole_size/2, h=hole_depth+1, center=true);
					}
					//any value not equal to 1 generates square holes
					else {cube(size=[hole_size, hole_size, hole_depth+1], center=true);
					}

				}
			}
		}
	}
}

module material_holes(hole_shape,material_hole_size,hole_depth,rows,columns,spacing,bottom_thick) {
translate([hole_size+1.5*spacing, hole_size+1.5*spacing, hole_depth/2+bottom_thick]){
	//generating rows and columns of holes
		//columns are Y axis
		for (b=[0:columns-2]) {
			//rows are X axis
			for (i=[0:rows-2]) {
				translate([i*(hole_size+spacing), b*(hole_size+spacing), 0]) {
					//square or round holes?
					//value of 1 = circles
					if (hole_shape==1) {
						cylinder(r=material_hole_size, h=hole_depth+3*bottom_thick, center=true);
					}
					//any value not equal to 1 generates square holes
					else {cube(size=[material_hole_size, material_hole_size, hole_depth+bottom_thick], center=true);
					}
}
}
}
}
}
//origin skid
   //translate([0,0,0]) cylinder(h=bottom_thick+hole_depth, d=10);
//opposite corner skid

//takes an appropriately sized block and removes an array of holes
difference() {
hull(){
	//main body
	cube(size=[rows*(hole_size+spacing), columns*(hole_size+spacing), bottom_thick+hole_depth], center=false);

//round the corners to avoid splitting
	translate([0,0,0]) cylinder(h=bottom_thick+hole_depth, d=wall_thickness*0.5, $fn=100);
	translate([rows*(hole_size+spacing)+spacing, columns*(hole_size+spacing)+spacing,0]) cylinder(h=bottom_thick+hole_depth, d=wall_thickness*0.5, $fn=100);
		translate([0, columns*(hole_size+spacing)+spacing,0]) cylinder(h=bottom_thick+hole_depth, d=wall_thickness*0.5, $fn=100);
	translate([rows*(hole_size+spacing)+spacing, 0,0]) cylinder(h=bottom_thick+hole_depth, d=wall_thickness*0.5, $fn=100);
}

//holes (improved resolution with $fn=100)
	holes(hole_shape,hole_size,hole_depth,rows,columns,spacing,bottom_thick, $fn=100);
//material holes to save mass
if (material_holes_on==1){
	material_holes(hole_shape,material_hole_size,hole_depth,rows,columns,spacing,bottom_thick, $fn=100);
	}

}

//Generate corner skids to minimise curling
//origin skid
   translate([0,0,0]) cylinder(h=skid_height, d=skid_diameter, $fn=100);
//opposite corner skid
	translate([rows*(hole_size+spacing)+spacing, columns*(hole_size+spacing)+spacing,0]) cylinder(h=skid_height, d=skid_diameter, $fn=100);
//far y axis skid
	translate([0, columns*(hole_size+spacing)+spacing,0]) cylinder(h=skid_height, d=skid_diameter, $fn=100);
//far x axis skid
//opposite corner skid
	translate([rows*(hole_size+spacing)+spacing, 0,0]) cylinder(h=skid_height, d=skid_diameter, $fn=100);

```


[User]
Hey, I'm looking for some OpenSCAD help. I've got this filament spool adapter I'd like to make, but I need it to be parametric so I can tweak the dimensions easily. Basically, it's a hub that fits inside a filament spool and then has a tube that goes into the center of the adapter. Think of it like a wheel hub.

I have a good idea how I want it to work in terms of parameters.

*   **Tube Diameter:** This is the diameter of the tube that goes *into* the hub. I'll be using 32mm tubes, but this should be adjustable.
*   **Spool Diameter:** This is the diameter of the hole in the filament spool itself. My spools are 53mm, but this needs to be flexible.
*   **Height:** How tall the entire hub is.
*   **Number of Arms:** The number of "arms" that connect the tube to the spool's outer wall. This will be a parameter to choose between different designs.
*   **Part Type:** I want a few different variations: "right", "left", "straight", "star_right", and "star_left". These will change the shape and position of the arms.
*   **Inner Diameter Backlash:** This would be a small amount added to the tube diameter to make sure the hub rotates freely on the tube (so the hole is slightly bigger than the tube).
*   **Collar Thickness:** A small collar can be added at the base of the hub. This controls its thickness.
*   **Chamfer Depth:** I want a chamfer at the top edge of the adapter. This would control the chamfer's depth.
*   **Wall:** This parameter will set the thickness of the cylindrical wall of the hub.
*   **Arm Thickness:** The thickness of the "arms" connecting the inner tube to the outer edge.
*   **Arm Compression:**  An extra dimension added to the outer diameter to ensure it fits snugly into the spool hole.
*   **Arm End Diameter:** Controls the size of the round end of each arm.
*   **Quality:**  The quality of the circle rendering (for smoothness). I usually use values between 60 and 100.

I also want to use the `hull()` function to connect circles for the arms, and `linear_extrude` for the main body. I'd also like to make a difference between a cylinder for the inner tube hole and the main body so I get the right shape.

The main body should have a profile something like this:
```
[
    [outer_diameter/2+arm_end_diameter+.1,collar_thickness],
    [outer_diameter/2,collar_thickness],
    [outer_diameter/2,height-chamfer_depth],
    [spool_diameter/2-.5,height+0.01],
    [outer_diameter/2+arm_end_diameter+.1,height+0.01],
];
```
That is, it goes out to the arm end, then back down, then steps inward, and then steps back up to the arm end height.

I'm not sure about libraries, but I'm not using any at the moment. Could you create the SCAD files for this? I think it will mostly be math and primitives, but I’m not experienced enough to make it work myself.

[Assistant]
spool_adapter_V1.4.scad:
```
// 'Customizable Spool Adapter' by wstein
// is licensed under the Attribution - Non-Commercial - Share Alike license.
// Version 1.3.1 (c) November 2015
// please refer the complete license here: http://creativecommons.org/licenses/by-sa/3.0/legalcode
//
// V1.4: inner hole fix (see http://www.thingiverse.com/thing:1151473)
// V1.3.1: Bug fixed for latest customizer
// V1.3: Customizer creation failure fixed. Some smaller issues fixed. More slider used. New license cc-by-sa!
// V1.2: part handling optimized
// V1.1a: UI optimized
// V1.1: new star shape

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

//to show. This setting is only relevant for preview.
part="right"; //[right:Right,left:Left,straight:Straight,star_right:Star Right,star_left:Star Left]

//depended on the inner and outer diameter, you may also need to change the "Arms" settings to get a perfect working adapter.
tube_diameter=32; //[0:0.5:75]
spool_diameter=53; //[0:1:150]
height=15; //[0:100]
number_of_arms=5; //[3:10]
function get_number_of_arms() = (part == "straight" && number_of_arms % 2 > 0 ? 1 : 0) + number_of_arms;

/*[Advanced]*/

inner_diameter_backlash=1.0; //[0:0.1:5]
collar_thickness=2.0; //[0:0.5:10]
chamfer_depth=2.0; //[0:0.5:20]
wall=3.0; //[0:0.1:10]

/*[Arms]*/

//I used 2mm on 32/53 Adapter with 6 arms and 2.4mm with 5 arms. It depends on the length.
arm_thickness=2.4; //[0:0.1:5]
//in mm. The adapter should fit tight to the spool, so the outer diameter is enlarged by this value.
arm_compression=1.0; //[0:0.1:5]
// in mm
arm_end_diameter=5.0; //[0:0.5:20]

/*[Expert]*/
quality=80; //[60:Normal,80:Good,100:High]

function get_part_index() = search([part], ["right","left","straight","star_right","star_left"])[0];

/*[Hidden]*/

inner_diameter=tube_diameter+inner_diameter_backlash;
outer_diameter=spool_diameter+arm_compression;

outer_shape=[

    [outer_diameter/2+arm_end_diameter+.1,collar_thickness],
    [outer_diameter/2,collar_thickness],
    [outer_diameter/2,height-chamfer_depth],
    [spool_diameter/2-.5,height+0.01],
    [outer_diameter/2+arm_end_diameter+.1,height+0.01],
];

number=part == "straight"?get_number_of_arms()/2:get_number_of_arms();

arm_degree=360/get_number_of_arms();
degree=360/number;

difference()
{
    linear_extrude(convexity=20,height=height)
    union()
    {
        if(get_part_index()>2)
        for(a=[0:degree:359])
        hull()
        {
            circle(r=inner_diameter/2+wall,$fn=quality);

            rotate([0,0,a])
            translate([cos_arm,0,0])
            circle(r=arm_thickness/2,$fn=arm_thickness*7);
        }
        else
        hull()
        {
            circle(r=inner_diameter/2+wall,$fn=quality);

            for(a=[0:degree:359])
            rotate([0,0,a])
            translate([cos_arm,0,0])
            circle(r=arm_thickness/2,$fn=arm_thickness*7);
        }

        for(a=[0:degree:359])
        rotate([0,0,a])
        for(i=[0:len(arm_paths[get_part_index()])-2])
        hull()
        for(j=[i:i+1])
        translate(arm_paths[get_part_index()][j])
        circle(r=arm_thickness/2,$fn=arm_thickness*7);

        for(a=[0:360/get_number_of_arms():359])
        rotate([0,0,a])
        translate([cos_arm,sin_arm])
        circle(r=arm_end_diameter/2,$fn=arm_end_diameter*7);
    }

    translate([0,0,-1])
    cylinder(r=inner_diameter/2, h=height+2, $fn=quality);

    rotate_extrude(convexity=20,$fn=quality)
    polygon(outer_shape);
}

sin_arm=sin(arm_degree/2)*outer_diameter/2;
cos_arm=cos(arm_degree/2)*outer_diameter/2;
arm_paths=[
    // right
    [
        [cos_arm,0],
        [cos_arm,sin_arm],
    ],
    // left
    [
        [cos_arm,0],
        [cos_arm,-sin_arm],
    ],
    // straight
    [
        [cos_arm,sin_arm],
        [cos_arm,-sin_arm],
    ],
    // right star
    [
        [cos_arm,0],
        [cos_arm,sin_arm],
    ],
    // left star
    [
        [cos_arm,0],
        [cos_arm,-sin_arm],
    ],
];

```


[User]
I'd like to create a customizable Pac-Man model. It should be parametric, allowing me to adjust the size of Pac-Man, how wide his mouth is open, and whether it is 2D (flat) or 3D. I'd also like to be able to add a flat base for standing him up, solid eyes, holed eyes, and even make Pac-Man hollow by removing the inside. Can you write me an OpenSCAD file for this? It should use the `arc` module from the example file. Also, the colors should be able to be specified, with default color yellow.

Essentially, the following things should be controllable parameters:

*   `size`:  The overall radius of Pac-Man.
*   `mouthangle`: The angle in degrees of Pac-Man's mouth opening.
*   `flat`:  Boolean to make it 2D if true, 3D if false.
*   `flatbase`: Boolean to add a flat base at the bottom for stability.
*   `eyes`: Boolean to add solid eyes.
*  `holeeyes`: Boolean to add hollow eye sockets rather than solid eyes
*   `holed`: Boolean to make Pac-Man hollow.
*   `pcolor`: The overall color of the Pacman model, defaulting to yellow.

I'd like it if you included an example call to show all the features at once too.

I'm imagining the output would need an included `arc` module like the example has, so you'll need to provide that as well.

[Assistant]
pacman.scad:
```
/*
    Parametric pacman
    Carles Oriol .  March 2015 - http://www.thingiverse.com/carlesoriol/about
*/

//use <arc.scad>; // inlined

// Resolution
$fn=128;

/* [Global] */

// Pacman radius
size = 20; // [1:100]

// Mouth open rangle
mouthangle = 45; // [0:180]

// Flat pacman (2D)
flat = 0; // [1, 0]

// Flat base to hold it up
flatbase = 0; // [1, 0]

// Solid eyes
eyes = 0; // [1, 0]

// Holed eyes
holeeyes = 0; // [1, 0]

// Empty pacman ball
holed = 0; // [1, 0]

pacman(size, mouthangle, flat, flatbase, eyes, holeeyes, holed );

//pacman_demo();
//pacman(5, 45, holed=true, flat=true);

module pacman_demo()
{
pacman(5, 45);
translate([15,0,0]) pacman(5, 45, flat=true);
translate([30,0,0]) pacman(5, 45, flatbase=true);
translate([45,0,0]) pacman(5, 45, flatbase=true, flat=true);
translate([60,0,0]) pacman(5, 45, eyes=true);
translate([75,0,0]) pacman(5, 45, holeeyes=true, flat=true);
translate([90,0,0]) pacman(5, 45, holeeyes=true);
translate([105,0,0]) pacman(5, 45, holed=true);
translate([120,0,0]) pacman(5, 45, eyes=true, flat=true);
translate([135,0,0]) pacman(5, 45, holed=true, flat=true);
}

module pacman(size, mouthangle, flat=false, flatbase = false, eyes=false, holeeyes=false, holed=false, pcolor = [1,1,0])
{
    if( flat)
        dopacman_flat(size, mouthangle, flatbase, eyes, holeeyes, holed, pcolor );
    else
        dopacman(size, mouthangle, flatbase, eyes, holeeyes, holed, pcolor );
}

module dopacman(size, mouthangle, flatbase = false, eyes=false, holeeyes=false, holed=false, pcolor = [1,1,0])
{

    color( pcolor )
    {

    difference()
    {
       difference()
        {
            sphere(size);
            if( holed )
            sphere(size*.9);

        }

         rotate([0,mouthangle/2,0])
            translate([0,-size,0])
                rotate([0,90,90])
                    arc(0, size*1.1, size*2, mouthangle);

        if( flatbase)
         translate([0,0,-size]) cube([size*2, size*2, size/4], center=true);

        if( holeeyes)
      color([.2,.2,.2])
    {
      translate([size/3,size/2,size/2]) sphere( size/4);
      translate([size/3,-size/2,size/2]) sphere( size/4);
    }
    }
}

if( eyes)
      color([.2,.2,.2])
    {
      translate([size/3,size/2,size/2]) sphere( size/4);
      translate([size/3,-size/2,size/2]) sphere( size/4);
    }
}

module dopacman_flat(size, mouthangle, flatbase=false, eyes= false, holeeyes=false,  holed=false, pcolor = [1,1,0])
{

    color( pcolor )
 {
    difference()
    {
            difference()
        {
        translate([0,size/16,0])
        rotate([90,90,0])
        rotate([0,0,180-mouthangle/2]) translate([0,0,-size/16]) arc(0, size, size/4, 360-mouthangle);

            if( holed )
            {
        translate([0,size/2,0])
        rotate([90,90,0])
        rotate([0,0,180-(mouthangle*1.50)/2]) translate([0,0,-(size*.8)/16]) arc(0, (size*.8), size, 360-(mouthangle*1.50));
                }
        }
            if( holeeyes)
            translate([size/8,0,size/2])
                rotate([90,0,0]) cylinder(r=size/8, h=(size/4)*1.1, center=true);
    }
        if( flatbase)
            translate( [0,0,-size] ) cylinder(r=size/2, h=size/8);
    }

    if( eyes)   color([.2,.2,.2])
            translate([size/8,0,size/2])
                //rotate([90,0,0]) cylinder(r=size/8, h=(size/4)*1.1, center=true);
                sphere(size/6);
}

/*
Inlined arc module

    http://www.thingiverse.com/thing:735183

    Working for figures over 180º
    modified 1st parameter name to innerradius
    modifier parameters order
    modified parameter name depth -> height

     Licenced under Creative Commons Attribution - Non-Commercial - Share Alike 3.0

     by Carles Oriol  March 2015
*/

/*
 * Excerpt from...
 *
 * Parametric Encoder Wheel
 *
 * by Alex Franke (codecreations), March 2012
 * http://www.theFrankes.com
 *
 * Licenced under Creative Commons Attribution - Non-Commercial - Share Alike 3.0
*/

module arc( innerradius, radius, height, degrees )
{
    $fn=200;

    render()
    {
            if( degrees > 180 )
            {
                difference()
                {
                  difference()
                    {
                        cylinder( r=radius, h=height );
                        cylinder( r=innerradius*1.0001, h=height );
                    }
                    rotate([0,0,-degrees]) arc( innerradius,radius*1.001, height*1.0001,  360-degrees) ;
                }
            }
            else
            {
                difference()
                {
                    // Outer ring
                    rotate_extrude()
                        translate([innerradius, 0, 0])
                            square([radius - innerradius,height]);

                    // Cut half off
                    translate([0,-(radius+1),-.5])
                        cube ([radius+1,(radius+1)*2,height+1]);

                    // Cover the other half as necessary
                    rotate([0,0,180-degrees])
                    translate([0,-(radius+1),-.5])
                        cube ([radius+1,(radius+1)*2,height+1]);
                }
            }

    }
}
```


[User]
I'd like to design a pill organizer for a week, but I want to make it configurable for different numbers of days and also if it should include an extra compartment (for "as needed" pills). I'd also like to put text on the lids indicating the days of the week (or a number sequence) in both standard and Braille, and to have it configurable for 1-4 weeks.

Here's a breakdown:

*   **Pill Compartment:** Each day will have a compartment, shaped like a cube with a slightly smaller cube cut out of the middle. Each pill compartment should have a clasp on the side of the top to attach to a lid.
*   **Lid:** The lid will be a thin rectangle designed to cover the pill compartment. It needs matching clasps to the ones on the pill compartments to attach securely.
*   **Days:** The organizer can be for 1 to 7 days. There's an option to include an additional "extra" compartment in each week, which would push the number of compartments to 2-8, but it also needs the number to be less than or equal to 7 if the extra compartment is set to false
*   **Text:** I need to be able to toggle whether or not text is included on the lid. If the text is enabled, it should be the days of the week (L, M, X, J, V, S, D for Spanish) if it's 7 days with the extra set to false, or (L, M, X, J, V, S, D, E) if extra is set to true and its 7 days. If it's less than seven days, it will need the numbers 1-n (or 1-n-E, if an extra compartment is present). The text needs to be rendered in both standard and Braille font.
*   **Weeks:** The whole organizer can be for 1 to 4 weeks. The weeks will just repeat the daily pill box and lid module.

I'll need some parameters to control everything:

*   `Number_of_days` (1-7): Number of days in the week (plus the extra one if enabled)
*   `Extra` (1: Yes, 2: No): Include an extra compartment or not.
*   `Text` (1: Yes, 2: No): Include text on the lid or not.
*    `Number_of_weeks` (1-4): Number of weeks in the organizer

I will also need a `write` library to be included, since I would like to create standard and Braille text on the lids. I'd prefer that the compartments be roughly 20mm cubes.

Could you generate the OpenSCAD code for me?

[Assistant]
Pillbox2SPA.scad:
```
include<write/Write.scad>

// Number of Days
Number_of_days=1; //[1,2,3,4,5,6,7]

// Extra?
Extra=2; //[1:Yes,2:No]

// Text on Lid?
Text=1; //[1:Yes,2:No

// Number of Weeks
Number_of_weeks=1; //[1,2,3,4]

//////////////////////////////////////////////////////////////////////////////////////////////

module clasp()
{
	cube([1,5,1]);
}
module pill()
{
	union()
	{
		difference()
		{
			cube(20,20,20);
			translate([1,1,3])cube(18,18,18);
		}
		translate([19,7.5,20])clasp();
		translate([0,7.5,20])clasp();
	}
}
module pillbox()
{
	union()
	{
		pill();

	}
}
module pillcontaineroneweek()
{
	if(Extra==1)
	{
		union()
		{
			for(i=[0:Number_of_days])
			{
				translate([0,i*19,0])pillbox();
			}
		}
	}
	else
	{
		union()
		{
			for(i=[0:Number_of_days-1])
			{
				translate([0,i*19,0])pillbox();
			}
		}
	}
}

module pillcontainer()
{
	if(Number_of_weeks==1)
	{
		pillcontaineroneweek();
	}
	else
	{
		union()
		{
			for(i=[0:Number_of_weeks-1])
			{
				translate([i*20,0,0])pillcontaineroneweek();

			}
		}
	}
}

module lid()
{
	union()
	{
		difference()
		{
			translate([-25,0,0])cube([20,19,1]);
			translate([-6,7.5,-.1])cube([1,5,1]);
			translate([-25,7.5,-.1])cube([1,5,1]);
		}
	}
}

module lidoneweek()
{
	if(Extra==1)
	{
		union()
		{
			for(i=[0:Number_of_days])
			{
				translate([0,i*21,0])lid();
			}
		}
	}
	else
	{
		union()
		{
			for(i=[0:Number_of_days-1])
			{
					translate([0,i*21,0])lid();
			}

		}
	}
}

module textonlid()
{
	if(Text==1)
	{
		if(Extra==1&&Number_of_days==7)
		{
			union()
			{
				for(i=[0:Number_of_days])
				{
					rotate([0,0,90])translate([7,10,1])write("LMMJVSD",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("LMMJVSD",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==2&&Number_of_days==7)
		{
			union()
			{
				for(i=[0:Number_of_days-1])
				{
					rotate([0,0,90])translate([7,10,1])write("LMMJVSD",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("LMMJVSD",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==1&&Number_of_days==6)
		{
			union()
			{
				for(i=[0:Number_of_days])
				{
					rotate([0,0,90])translate([7,10,1])write("123456E",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("123456E",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==2&&Number_of_days==6)
		{
			union()
			{
				for(i=[0:Number_of_days-1])
				{
					rotate([0,0,90])translate([7,10,1])write("123456",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("123456",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==1&&Number_of_days==5)
		{
			union()
			{
				for(i=[0:Number_of_days])
				{
					rotate([0,0,90])translate([7,10,1])write("12345E",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("12345E",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==2&&Number_of_days==5)
		{
			union()
			{
				for(i=[0:Number_of_days-1])
				{
					rotate([0,0,90])translate([7,10,1])write("12345",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("12345",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==1&&Number_of_days==4)
		{
			union()
			{
				for(i=[0:Number_of_days])
				{
					rotate([0,0,90])translate([7,10,1])write("1234E",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("1234E",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==2&&Number_of_days==4)
		{
			union()
			{
				for(i=[0:Number_of_days-1])
				{
					rotate([0,0,90])translate([7,10,1])write("1234",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("1234",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==1&&Number_of_days==3)
		{
			union()
			{
				for(i=[0:Number_of_days])
				{
					rotate([0,0,90])translate([7,10,1])write("123E",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("123E",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==2&&Number_of_days==3)
		{
			union()
			{
				for(i=[0:Number_of_days-1])
				{
					rotate([0,0,90])translate([7,10,1])write("123",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("123",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==1&&Number_of_days==2)
		{
			union()
			{
				for(i=[0:Number_of_days])
				{
					rotate([0,0,90])translate([7,10,1])write("12E",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("12E",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==2&&Number_of_days==2)
		{
			union()
			{
				for(i=[0:Number_of_days-1])
				{
					rotate([0,0,90])translate([7,10,1])write("12",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("12",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==1&&Number_of_days==1)
		{
			union()
			{
				for(i=[0:Number_of_days])
				{
					rotate([0,0,90])translate([7,10,1])write("1E",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("1E",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
		if(Extra==2&&Number_of_days==1)
		{
			union()
			{
				for(i=[0:Number_of_days-1])
				{
					rotate([0,0,90])translate([7,10,1])write("1",h=10,t=2,space=3.05);
					rotate([0,0,90])translate([9,5,1])write("1",h=5,t=2,font="braille.dxf",space=6.1);
					lidoneweek();
				}
			}
		}
	}
	else
	{
	lidoneweek();
	}
}

module fulllid()
{
	if(Number_of_weeks==1)
	{
		textonlid();
	}
	if(Number_of_weeks==2)
	{
		textonlid();
		translate([-25,0,0])textonlid();
	}
	if(Number_of_weeks==3)
	{
		textonlid();
		translate([-25,0,0])textonlid();
		translate([-50,0,0])textonlid();
	}
	if(Number_of_weeks==4)
	{
		textonlid();
		translate([-25,0,0])textonlid();
		translate([-50,0,0])textonlid();
		translate([-75,0,0])textonlid();
	}
}
fulllid();
pillcontainer();

```


[User]
Hi, I'm looking to generate a parametric tool rack for use with keyhole-style shelving. I've seen a few designs online, but I'd like one that is highly customizable and generated from OpenSCAD. I've got some specific ideas in mind about how the parameters should work.

First, the keyhole portion needs to be configurable by:
*   `key_big`: The diameter of the large circular part of the keyhole.
*   `key_small`: The diameter of the smaller, straight section of the keyhole that extends from the circle.
*   `key_spacing`: The center-to-center distance between adjacent keyholes.
*   `key_thickness`: The thickness of the material that the keyholes are cut out of; essentially, the 'shelf' thickness.

These values might need to be slightly larger than the physical dimensions of the keyhole to allow for some clearance in the actual print. I'm not sure what the best way to build that clearance is.

Then, I'd like the 'shelf' part of the tool rack to have parameters as well:
*   `shelf_width`: The overall width of the 'shelf', that is the horizontal component of the rack that will hold the tools. This should be centered relative to the keyholes.
*   `shelf_hole_radius`: The radius of the holes we'll use to mount the tools.
*   `num_holes`: The number of tool mounting holes on the shelf.

The spacing between the tool holes should be calculated automatically based on `shelf_width`, `shelf_hole_radius`, and `num_holes` so they're evenly distributed along the shelf. I'm not sure how to do this in OpenSCAD.

Finally, I have some specific ideas about the design:
*   The 'hook' or 'poke' (I've seen it referred to both ways, it's the component that extends from the keyhole section to give support to the shelf section) should be a simple wedge, basically a rectangular prism with an angled slope coming off of it, and that should be configured based on the depth/height of the support bar. There should be a support bar that runs between the posts with the keyholes. The hook should be slightly smaller than the poke.
*   There should be two keyhole posts.
*   The posts should be cylindrical and extend to below the support bar with a larger cylindrical base to make better contact with the support bar, and the wedge should intersect these posts somehow for added stability
*   The hook and support should be attached to the cylinders and not just touching them.

I think that should cover everything. Could you please generate an OpenSCAD file (or files if you think it makes sense to separate the keyhole and shelf components) based on these parameters? I do not need to include any libraries or modules in the response.

[Assistant]
parametric_tool_rack_for_keyhole_shelving.scad:
```
//width of the shelf
shelf_width = 100;
//radius of the holes
shelf_hole_radius = 3;
//number of holes
num_holes = 8;

//diameter of the large round part of the key hole,make smaller then real (for clearaces)
key_big = 11;
//diameter of the small offshoot from the main key cylinder,make smaller then real (for clearaces)
key_small = 6;

//distance from one key hole to the same point in the next key hole, make slightly bigger then real (for clearaces)
key_spacing = 39;
//thickness of the material the key holes are kut out of, make slightly bigger then real (for clearaces)
key_thickness = 1.75;

//total hight if hook tip, hook width will = half this, hook should be smaller then poke
hook = 10;
//thickness of lugs and support bar
support_thickness = 4;

//calculated
spacer = ((shelf_width - (shelf_hole_radius * 2 * num_holes)) / num_holes) / 2;
poke = (shelf_hole_radius*2)+hook;
hookStart = support_thickness*2+key_thickness;
angle = atan ( hook / poke);
hype = poke + hook;
KBR = key_big/2;
KSR = key_small/2;

module wedge()  {
	translate([0,-key_small,0]) difference() {
		cube([poke,key_small,hook]);
		rotate(a=[0,-angle,0])translate([0,-1,0])cube([hype,key_small+2,hook]);
	}
}

module betterjoints() {
	intersection(){
		translate([0,-KSR,0])cube([key_spacing,key_small,support_thickness*2+key_thickness]);
		cylinder(h= support_thickness*2+key_thickness ,r1 = KBR , r2 = KBR,$fn=36);
	}
}

translate([-KBR- key_spacing/2,-KBR,0]) {		//to centre item on the build platform

  difference() {
    //shelf
    translate([KBR, KBR - (shelf_width/2), hookStart]) {
	    cube([hook/2, shelf_width, poke]);
    }

    //holes
    for ( i = [1 : num_holes ] ) {
      translate([
	      (KBR/2)-(hook/2),
	      KBR - (shelf_width/2) + (shelf_hole_radius + spacer)*(i *2-1),
	      hype-(poke/2)+(key_small/2)]) {

	      rotate([0, 90, 0]) {
		      #cylinder(h = hook*2, r = shelf_hole_radius);
	      }
      }
    }
  }

  translate([KBR,KBR - KSR,hookStart]) {		//support bar making and wedge
    translate([poke,0,0])rotate(a=[0,0,180]) wedge();
    translate([0,0,-support_thickness]) cube([key_spacing,key_small,support_thickness]);
  }

  translate([KBR,KBR,0]) {								//post 1
	  cylinder(h= hookStart + poke, r1 = KSR ,r2 = KSR,$fn=36);
	  cylinder(h= support_thickness ,r1 = KBR , r2 = KBR,$fn=36);
	  betterjoints();
	  translate([key_spacing,0,0]){						//post 2
		  cylinder(h= hookStart, r1 = KSR ,r2 = KSR,$fn=36);
		  cylinder(h= support_thickness ,r1 = KBR , r2 = KBR,$fn=36);
		  betterjoints();
		  }
	  }
}

```


[User]
I'd like a parametric fan cover design. I want to be able to specify the overall size of the square cover, its height, and the positions of the screw holes. I'll also need to set the size of the screw holes and the screw heads.

The cover should have a pattern of concentric circles, and I want to control how many circles there are. In addition, there should be radial supports, and I need to be able to set the number of those as well. To allow air to pass through, I need to be able to control the percentage of empty space between the circles, which will be filled with radial supports.

Finally, I want an option to add an inset on the bottom that allows the fan to sit in the cover. This needs to be parameterizable by height.

I'm looking for something similar to what's in the provided code, but I'd like the AI to generate all of the code from scratch, so I can explore all of the options without being locked into a pre-existing structure.

I'm not using any libraries currently, but would be open to using one if it makes things easier.

[Assistant]
fanprotector.scad:
```
/*
    Parametric Fan cover

    Carles Oriol March 22, 2015

*/

/* [Global] */

// Fan cover size (always square)
fancoversize=4;
// Fan cover height
fancoverheight=.2;

// Screws inside offset from corners
screwpos=.35;

// Size of screw hole
screwsize=.3;

// Size of screw head
screwcoversize=.55;

// Number of concentric circles
circles = 4;
// Number of radial supports
nradis=3;
// 0-1 Percent of empty space for air.
percair=.75;

// Inset fan
inh = .06;

// Resolution
$fn=128;

ncircles=circles+1;
conerdelta= fancoversize/2-screwpos;

stepsize=(fancoversize/2)/ncircles;
fillstepsize=stepsize*percair;
emptystepsize=stepsize*(1-percair);

difference()
{
union()
{
difference()
{
difference()
{
    hull ()
    {
        translate([conerdelta, conerdelta ,0]) cylinder( r= screwpos, h=fancoverheight );
        translate([-conerdelta, conerdelta,0]) cylinder( r= screwpos, h=fancoverheight );
        translate([conerdelta, -conerdelta ,0]) cylinder( r= screwpos, h=fancoverheight );
        translate([-conerdelta, -(fancoversize/2-screwpos) ,0]) cylinder( r= screwpos, h=fancoverheight );
    }

    translate([conerdelta, conerdelta , -fancoverheight/2]) cylinder(r=screwsize/2, h= fancoverheight*2 );
    translate([-conerdelta, conerdelta , -fancoverheight/2]) cylinder(r=screwsize/2, h= fancoverheight*2 );
    translate([-conerdelta, -conerdelta , -fancoverheight/2]) cylinder(r=screwsize/2, h= fancoverheight*2 );
    translate([conerdelta, -conerdelta , -fancoverheight/2]) cylinder(r=screwsize/2, h= fancoverheight*2 );

        translate([conerdelta, conerdelta , +fancoverheight/2]) cylinder(r=screwcoversize/2, h= fancoverheight*2 );
    translate([-conerdelta, conerdelta , +fancoverheight/2]) cylinder(r=screwcoversize/2, h= fancoverheight*2 );
    translate([-conerdelta, -conerdelta , +fancoverheight/2]) cylinder(r=screwcoversize/2, h= fancoverheight*2 );
    translate([conerdelta, -conerdelta , +fancoverheight/2]) cylinder(r=screwcoversize/2, h= fancoverheight*2 );
}

i=5;

translate([0,0,-fancoverheight/2])
for( i=[2:ncircles] )
difference()
{
cylinder( r =stepsize*i-emptystepsize/2,          fancoverheight*2);
translate([0,0,-.1]) cylinder( r =stepsize*(i-1)+emptystepsize/2,          fancoverheight*2+1);
}
}

for( i=[0:nradis] )
rotate([0,0,360/nradis*i]) translate( [-fancoversize/2,-emptystepsize/2,0]) cube([ fancoversize,emptystepsize,fancoverheight]);
}

if( inh != 0 )
    translate([0,0,-.01]) cylinder(h=inh, r=fancoversize/2-emptystepsize/2);

}

```


[User]
Hey, I'm looking to design a custom toothbrush holder, and I'd like to use OpenSCAD to make it parametric. I'd like the following features and options:

*   **Number of Toothbrushes:** I need to be able to specify how many toothbrushes the holder should accommodate. This should determine how long the base and backplate are, and how many individual holders are generated.
*   **Holder Spacing:** I need control over the spacing between the toothbrush holders, as well as the spacing from the outside of the outer holders to the edge of the base plate.
*   **Holder Dimensions:** I want to define the inner and outer width of each toothbrush holder. The holder should start wider at the base and narrow towards the back to hold the toothbrushes at an angle. Also the depth (how much they stick out from the backplate).
*   **Base:** The base needs to have adjustable width, depth and height parameters. It should be a simple rectangular shape and have the option to create a material-saving circular cutout in it. The depth should be enough that the holders don't cause it to overbalance.
*   **Backplate:** A backplate is needed that rises from the back of the base to the top of the toothbrush stems. I should be able to set its thickness. I also want to be able to put material-saving circular cutouts in it.
*   **Toothbrush Stem Height:** I need a parameter that dictates the minimum height of a toothbrush stem that will be held by the device. This should be used to determine the height of the backplate.
*  **Initial Text:**  I need to be able to specify text that should be placed directly behind each toothbrush holder on the back plate. I should be able to specify the text as a list.
*   **Splitting:** I would like a toggle option to split the design into two pieces, in case I want to print it on a smaller printer.
    *   If split, the two pieces will connect with rod/hole connectors. I need to be able to set the length of the rods/holes, radius of rods/holes, cushion (space between) the rods/holes, and an overall tolerance for the rod/hole fit.
    *   There should also be a parameter for how far along the height the split is.
    *   Finally, there needs to be a parameter to add a gap between the two pieces when they are connected, as well.
*  **Cutouts:** I need to be able to toggle whether the cutouts on the base and back are generated.
*   **Units:**  Everything should be in millimeters.

I'm not looking to use any special libraries, so just base OpenSCAD should be fine. Can you please generate a set of OpenSCAD files to create this design, with the parameters and structure described? Thanks!

[Assistant]
toothbrush_holder.scad:
```
// Number of toothbrushes to hod
number_of_toothbrushes = 2;
// Distance the from the outer holders to the side
holder_side_cushion = 10;
// Distance between toothbrush holders
holder_cushion = 20;
// For the holder itself, the outer distance apart (before narrowing)
holder_max_width = 15;
// For the holder itself, the inner distance apart
holder_min_width = 9;
// Depth of the protruding toothbrush holder
holder_depth = 30;
width = (number_of_toothbrushes * holder_max_width) + (2 * holder_side_cushion) +((number_of_toothbrushes - 1) * holder_cushion);
base_width = width;
// Depth of the base
base_depth = 80;
// Height of the base
base_height = 3;
// Just to make OpenSCAD happy.
fudge = 0.01;
// Min height of the stem of a toothbrush that goes in (neck to bottom)
toothbrush_stem_height = 175;
// Thickness of backing plate.
backplate_thickness = 5;
// Split this into two pieces, with rods and holes for connecting?
split = true;
// Length of rods that will connect the two pieces
split_rod_length = 10;
// Distance between rods that will connect the two pieces
split_rod_cushion = 10;
// Tolerance in radius of rods/holes
split_rod_radius_tolerance = .5;
// Tolerance in length of rods/holes
split_rod_length_tolerance = 1;
split_rod_radius = (backplate_thickness / 2) - (2 *split_rod_radius_tolerance) - fudge;
// Height to split into pieces
split_at = 90;
base_cutout_radius = (min(base_depth,base_width) / 2) - 5;
back_cutout_radius = (min(width,split_at) / 2) - 5;
// Should we make circular cutouts?
apply_cutouts = true;
// If we're splitting it, distance between the two pieces
distance_between = 10;
text_depth=backplate_thickness / 2;
// Initials to place below the holders
initials = ["A","B"];

module base(){
    difference(){
        cube([base_width,base_depth,base_height]);
        if (apply_cutouts){
            translate([base_width / 2,(base_depth - backplate_thickness) / 2,0]) cylinder(r=base_cutout_radius,h=base_height);
        }
    }
}

module back(){
    translate([0,base_depth - backplate_thickness,base_height]){
        difference(){
            cube([base_width,backplate_thickness,toothbrush_stem_height]);
            if (apply_cutouts){
                translate([width / 2,backplate_thickness+(fudge/2),base_height+back_cutout_radius+15]) rotate([90,0,0]) cylinder(r=back_cutout_radius,h=(backplate_thickness+fudge));
            }
        }
    }
}

module initials(){
    for (i = [0 : number_of_toothbrushes]){
        x_offset = holder_side_cushion+((holder_max_width / 2)-4.5) + (i * (holder_cushion + holder_max_width));
        translate([x_offset,(base_depth - backplate_thickness)+text_depth,150]) rotate([90,0,0]) linear_extrude(height=text_depth){
            text(initials[i]);
        }
    }
}

module holder(){
    travel = (holder_max_width - holder_min_width)/2;
    piece_length = travel / sin(45);
    rotate([0,45,0]){
        cube([piece_length,holder_depth,1]);
    }
    translate([travel + holder_min_width,0,-travel]){
        rotate([0,-45,0]){
            cube([piece_length,holder_depth,1]);
        }
    }
}

module holders() {
    translate([holder_side_cushion,base_depth - (backplate_thickness + holder_depth),base_height + toothbrush_stem_height]){
        for (i = [0:number_of_toothbrushes - 1]){
            translate([(holder_max_width + holder_cushion)*i,0,0]){
                holder();
            }
        }
    }
}

module splitRod(isHole) {
    if (isHole){
        cylinder(r=(split_rod_radius+split_rod_radius_tolerance),h=(split_rod_length+split_rod_length_tolerance));
    } else {
        cylinder(r=split_rod_radius,h=split_rod_length);
    }
}

module fullThing(){
    difference(){
        union() {
            base();
            back();
            holders();
        }
        initials();
    }
}

module bottomPart(){
    difference(){
        union(){
            intersection(){
                fullThing();
                cube([width,base_depth,split_at]);
            }
            translate([split_rod_cushion,base_depth - (backplate_thickness / 2),split_at]){
                splitRod(false);
            }
            translate([width - split_rod_cushion,base_depth - (backplate_thickness / 2),split_at]){
                splitRod(false);
            }
        }
        translate([(split_rod_cushion*2)+(split_rod_radius*2),base_depth - (backplate_thickness / 2),split_at-split_rod_length]){
            splitRod(true);
        }
        translate([width - ((split_rod_cushion*2)+(split_rod_radius*2)),base_depth - (backplate_thickness / 2),split_at-split_rod_length]){
            splitRod(true);
        }
    }
}

module topPart(){
    top_height = base_height + toothbrush_stem_height;
    rotate([180,0,0]) translate([width+distance_between,-base_depth,-top_height]) difference(){
        union(){
            intersection(){
                fullThing();
                translate([0,0,split_at]) cube([width,base_depth,top_height - split_at]);
            }
            translate([(split_rod_cushion*2)+(split_rod_radius*2),base_depth - (backplate_thickness / 2),split_at-split_rod_length]){
                splitRod(false);
            }
            translate([width - ((split_rod_cushion*2)+(split_rod_radius*2)),base_depth - (backplate_thickness / 2),split_at-split_rod_length]){
                splitRod(false);
            }
        }
        translate([split_rod_cushion,base_depth - (backplate_thickness / 2),split_at]){
            splitRod(true);
        }
        translate([width - split_rod_length,base_depth - (backplate_thickness / 2),split_at]){
            splitRod(true);
        }
    }
}

if (split){
    bottomPart();
    topPart();
} else {
    fullThing();
}
```


[User]
I need a custom beam designed in OpenSCAD, and I want it to be compatible with Makeblock 0824 beams, but with a modification to the center slot.

Here are the details:

*   **Overall Shape:** It should have the same rectangular profile as a standard Makeblock 0824 beam (8mm wide x 24mm high).
*   **Length:** I need to be able to easily change the length of the beam. Let's make it a multiple of 16mm.
*   **Mounting Holes:** The beam needs holes for mounting.
    *   It should have the standard 8mm-spaced mounting holes, that exist on the top and bottom faces of the original 0824 beams. I would like to be able to specify the diameter of these holes.
    *   Instead of the center slot, I need a series of holes down the center of the beam, spaced 16mm apart. I'd also like to be able to control the diameter of these center holes separately.
*   **Rounded Edges:** I'd like rounded edges on the long edges of the beam. The radius of these edges should be a parameter as well, since I may want to experiment with them.
*   **Parameters:** I need to be able to specify:
    *   The total length of the beam
    *   The diameter of the side mounting holes
    *   The diameter of the center mounting holes
    *   The radius of the rounded edges

I need all of this to be parametric. The design should be created using only the core OpenSCAD language, no external libraries.

[Assistant]
0824extrusion.scad:
```
// Created by Heindal at Thingiverse on March 2015

// Values for user to edit

// Length of extrusion
length = 80; // [16,32,48,64,80,96,112,128,144,160,176,192]
// Diameter of holes in extrusion
holeDia = 4.15; // [3.4:3.4mm for Tap, 4.15:4.15mm for Tight Fit, 4.3:4.3mm for Loose Fit]

/* [Hidden] */
//Number of rows of holes in extrusion
rowCount = floor(length/16);
// Calculated values - edit at your own risk
outsideWidth = 8;
outsideHeight = 24;
outsideLength = 16*rowCount-0.1;

module rounded_box(l,w,h,r_edge){

cube(size=[l-2*r_edge,w-2*r_edge,h ],center=true);

for (x = [l/2-r_edge,-(l/2-r_edge) ]) {
	for (y = [(w/2-r_edge),-(w/2-r_edge)]) {
		translate([x,y,0]) cylinder(r1=r_edge,r2=r_edge,h=h,center=true,$fn=40);
	}
}
translate([0,w/2-r_edge,0]) cube(size=[l-2*r_edge,2*r_edge,h ],center=true);
translate([0,-(w/2-r_edge),0]) cube(size=[l-2*r_edge,2*r_edge,h ],center=true);
translate([(l/2-r_edge),0,0]) cube(size=[2*r_edge,w-2*r_edge,h ],center=true);
translate([-(l/2-r_edge),0,0]) cube(size=[2*r_edge,w-2*r_edge,h ],center=true);

}

rotate([90,0,0]) {
	difference() {
		rounded_box(outsideHeight,outsideWidth, outsideLength, 0.5);
		// mounting holes to match the rail
		for (z = [-16*(rowCount-1)/2 : 16 : 16*(rowCount-1)/2]) {
			for (x = [-8,8]) {
				translate([x,0,z]) rotate([90,0,0]) cylinder(r=holeDia/2, h=outsideWidth+1, center=true, $fn=16);
			}
		}
		// mounting holes to match center slot
		for (z =  [-16*rowCount/2 : 16 : 16*rowCount/2]) {
				translate([0,0,z]) rotate([90,0,0]) cylinder(r=holeDia/2, h=outsideWidth+1, center=true, $fn=16);
		}
	}
}

```


[User]
I need a customizable dishwasher strainer, and I'd like it to be generated in OpenSCAD. I have some specific requirements for the design.

The basic shape should be a rectangular box. I need to be able to set the overall *length*, *width*, and *height* of this box as parameters. The strainer walls should have a honeycomb pattern, and I need to define the diameter of the incircle of the hexagon (*cell_size*) and the wall thickness (*wall_thickness*) used in the honeycomb.

I need to be able to choose whether the back, sides, and front walls have the honeycomb pattern, or if they are solid walls.  I'd like a parameter called *solid_walls* that can be set to "Yes" or "No". If set to "Yes", then the entire box (including back, front, and sides) is a solid box with no honeycomb pattern, but still retaining the overall box shape. If set to "No", the bottom should have the honeycomb pattern and the back, sides, and front walls should all use the honeycomb structure. Also, I will need the bottom to have a honeycomb pattern regardless of if the other walls are solid or not.

The honeycomb structure is based on a repeating hexagon pattern and should completely cover the face. Also, the pattern should cut out the shapes. I think the included code has this defined properly in the *hc_hexagon*, *hc_column*, and *honeycomb* modules if that helps.

Finally, the box should have an inner volume such that the sides of the solid box are wall_thickness away from the outer perimeter. Similarly, the sides of the honeycombed box are wall_thickness away from the outer perimeter.

I’d like to make sure that this is parametric, so I can easily change the dimensions to fit different dishwashers. I do not need any external libraries for this.

[Assistant]
strainer.scad:
```
// in mm
length=50;
// in mm
width=60;
// in mm
height=19.25;

//Diameter of the Incircle of the Hexagons
cell_size=7;
//Stability vs Transmissibility
wall_thickness=1.75;
solid_walls="No";//[Yes,No]

//multiple_cell=2;
//height=multiple_cell*cell_size+multiple_cell*wall_thickness+wall_thickness;

solid_wall = solid_walls=="Yes";

//honeycomb(length, width, height, cell_size, wall_thickness);
//bottom
honeycomb(length, width, wall_thickness, cell_size, wall_thickness);
if (!solid_wall)
{
//front
translate([0,wall_thickness,0])
rotate([90,0,0])
honeycomb(length, height, wall_thickness, cell_size, wall_thickness);
//back
translate([0,width,0])
rotate([90,0,0])
honeycomb(length, height, wall_thickness, cell_size, wall_thickness);
//left
rotate([90,0,90])
honeycomb(width, height, wall_thickness, cell_size, wall_thickness);
//right
translate([length-wall_thickness,0,0])
rotate([90,0,90])
honeycomb(width, height, wall_thickness, cell_size, wall_thickness);
}
//hollow cube
difference(){
	cube([length, width, height],center=false);
	{
	union(){
		translate([wall_thickness,wall_thickness,-0.5])
		cube([length-2*wall_thickness, width-2*wall_thickness, height+1],center=false);
		if (!solid_wall)
		{
			translate([-wall_thickness,wall_thickness,wall_thickness])
			cube([length+2*wall_thickness, width-2*wall_thickness, height-2*wall_thickness],center=false);
			translate([wall_thickness,-wall_thickness,wall_thickness])
			cube([length-2*wall_thickness, width+2*wall_thickness, height-2*wall_thickness],center=false);
		}
	}
	}
}

/* Thanks to Przemo Firszt for the honeycomb structure
source: http://blog.firszt.eu/index.php?post/2013/05/31/OpenSCAD-first-battle
source file:http://firszt.eu/openscad/honeycomb.scad
edited by Jan Huennemeyer: Added 'center' option
*/
module hc_hexagon(size, height) {
	box_width = size/1.75;
	for (r = [-60, 0, 60]) rotate([0,0,r]) cube([box_width, size, height],
true);
}

module hc_column(length, height, cell_size, wall_thickness) {
   no_of_cells = floor(1 + length / (cell_size + wall_thickness)) ;

        for (i = [0 : no_of_cells]) {
                translate([0,(i * (cell_size + wall_thickness)),0])
                        hc_hexagon(cell_size, height + 1);
        }
}

module honeycomb (length, width, height, cell_size, wall_thickness, center) {
   no_of_rows = floor(1.75 * length / (cell_size + wall_thickness)) ;

   tr_mod = cell_size + wall_thickness;
   tr_x = sqrt(3)/2 * tr_mod;
   tr_y = tr_mod / 2;
        off_x = -1 * wall_thickness / 2;
        off_y = wall_thickness / 2;
        difference(){
                cube([length, width, height],center=center);
					 if (center)
					 translate([-length/2, -width/2, -height/2])
                	for (i = [0 : no_of_rows]) {
                  	      translate([i * tr_x + off_x, (i % 2) * tr_y + off_y, (height) / 2])
                     	           hc_column(width, height, cell_size, wall_thickness);
	                }
					 else
						for (i = [0 : no_of_rows]) {
                     	   translate([i * tr_x + off_x, (i % 2) * tr_y + off_y, (height) / 2])
                  	              hc_column(width, height, cell_size, wall_thickness);
	                }

        }
}
```


[User]
I'm trying to design a replacement part for a combi rollo, and I've got some measurements and a rough idea of the geometry, but I need some help creating a parametric OpenSCAD model.

Essentially, the part consists of a main cylinder with two pie-slice shaped extensions, and a rectangular hole through the side of the main cylinder.

Here are the dimensions I'm thinking of:

*   **Main Cylinder:**
    *   Height: 10.0 mm
    *   Radius: 11.54/2 mm
*   **Pie-Slice Extensions:**
    *   Radius: 17.6/2 mm
    *   Height: 3.63 mm
    *   Width (angle in degrees): 54 degrees
*   **Rectangular Hole:**
    *   Width: 3.6 mm
    *   Length: 6.44 mm
    *   The hole should go through the cylinder, centered on the cylinder's height.

I'm imagining that the pie-slice extensions are positioned on opposite sides of the main cylinder. The hole will be located on the side, orthogonal to the extensions.

Could you generate an OpenSCAD file that creates this part parametrically? I'd like to be able to easily adjust all of those dimensions later.

Oh, and I would like to be able to have the standard $fa and $fn variables at the beginning of the file, I plan on using values of $fa = .1 and $fn = 100.

[Assistant]
CombiRolloPart.scad:
```
$fa = .1;
$fn = 100;

//Heigth of the main cylinder
Heigth = 10.0;
//Radius of the main cylinder
RadiusCylinder = 11.54/2;
//Radius of the Pie part
RadiusPie = 17.6/2;
//heigth of the Pie part
HeigthPie = 3.63;
//Width if the Pie piece in degrees
PiePieceWidth = 54;
//Width of the hole in the main cylinder
widthHole = 3.6;
//Length of the hole in the main cylinder
lengthHole = 6.44;

module pie_slice(r, a, h, q=90){
  intersection(){
    cylinder(h=h, r=r);
    cube([r, r, h]);
    rotate(a-q) cube([r, r, h]);
  }
}

module ding(){
	cylinder(h = Heigth, r = RadiusCylinder);
	pie_slice(r=RadiusPie,a=PiePieceWidth,h=HeigthPie);
	rotate(180) pie_slice(r=RadiusPie,a=PiePieceWidth,h=HeigthPie);
}

difference(){
	ding();
	rotate(90 + PiePieceWidth/2) cube([lengthHole, widthHole, Heigth*2+0.1], center=true);
}

```


[User]
Hey, I'm looking to create some Reuleaux polygons in OpenSCAD, and I want to make them fully parametric so I can easily adjust the number of sides, the distance between vertices, and the height. I've seen a basic example using `intersection_for` and rotating circles, but I need something more robust and usable for generating different sizes and shapes for printing and experimentation.

Specifically, I'd like to be able to specify:

*   **Number of Sides (s):** I need to be able to create Reuleaux triangles (s=3), pentagons (s=5), heptagons (s=7), nonagons (s=9), and perhaps even higher-sided polygons in the future.
*   **Vertex Distance (r):** The distance between any two vertices of the Reuleaux polygon. This will determine the overall size.
*   **Height (h):** The extrusion height of the 2D shape, making it a 3D object.

I want the code to be easily customizable through these three variables and also be modular enough so that the code is easy to understand and maintain.
Ideally, the output should be a single `.scad` file that includes all required functionality. Could you generate the code for this?

[Assistant]
Reuleaux.scad:
```
// Ammount of sides the object has
s=3; // [3,5,7,9]
// Distance between two verticies (mm) NOTE: Two different sided figures with the same distance between verticies will NOT work together. I will make it work together soon.
r=30; // [1:150]
// Height (mm)
h=5; // [1:30]
linear_extrude(height=h) {
    intersection_for(i = [1:s]) {
        rotate([0,0,i * 360/s]) {
            translate([r/2,0,0]) {
                circle(r, $fn = 200);
            }
        }
    }
}
```


[User]
I'd like to create a set of interlocking SMD component trays, and I need a parametric OpenSCAD design. The idea is to have individual compartments that can be connected together using dovetail joints on their sides. I also need to create a lid for the full tray.

Here are the specifics:

*   **Compartments:**
    *   Each compartment should be a cube with adjustable dimensions (width and depth). Let's call these `comp_w` and `comp_z`.
    *   The walls around the compartment should have a thickness controlled by a variable `wall`.
    *   I need a rounded cutout on one side of the compartment, basically a half-cylinder, to make picking up components easier. Its dimensions will need to scale with compartment size.
    *   The male and female dovetail joints will need a variable for adjusting fit, called `fit`, so they can be tuned for different printers.
    *   The interlocking mechanisms should be on all four sides of each compartment.

*   **Interlocking Walls:**
    *   I need to generate separate files for the interlocking walls. There are two types, a male wall (`wall_p`) and a female wall (`wall_n`).
    *   These walls should interlock on the sides, with the top of each wall interlocking with the lip of the lid.
    *   The `wall_p` should have a stop at the bottom so that the tray doesn't slide through the interlocking wall.
    *   The walls also need the dovetail interlock.

*   **Lid:**
    *   The lid should be a flat rectangular solid, sized to fit over an array of compartments (rows and columns). It should also interlock with the interlocking walls (`wall_p`, `wall_n`).
    *   The lid should have a thickness controlled by the variable `lid_th`
    *   I need to be able to write text on the top of the lid. I'll provide the text.

*   **Parameters:**
    *   I need variables for:
        *   `rows` (number of rows of compartments)
        *   `columns` (number of columns of compartments)
        *   `comp_w` (compartment width)
        *   `comp_z` (compartment depth)
        *   `wall` (wall thickness)
        *   `fit` (fit adjustment for dovetails)
        *   `lid_th` (lid thickness)
        *  `lid_text` (text for lid)

*   **File Structure:**
    *   I'd like to see separate modules for each of the primary components (compartment, wall_p, wall_n, lid).
    *   And a separate module called `print_part` which will allow me to specify what part is rendered, or render all parts.
    *   The interlocking parts need to be designed so that they do not extend beyond the rectangular prism of the part.
    *   I will also need a module for the male dovetail (`interlock_p`) and the female dovetail (`interlock_n`).
    *   Please also use the `Write` library in OpenSCAD to write the text on the lid.

Essentially, I'm looking for a system of parametric, interlocking trays with a lid that I can use for organizing SMD components, and I need to be able to generate each individual component piece to print.

[Assistant]
smd_tray.scad:
```
/**
 *  Interlocking SMD trays
 *
 *  Elliot Buller
 *  2015
 */

/* Dovetail for interlocking parts
 *
 * Elliot Buller
 * 2015
 */
use <write/Write.scad>

/* [Hidden] */
// Curve smoothness fn
$fn = 60;

// Ensure model is watertight
q = 0.1;

/* [Global] */
part = "compartment"; // [compartment:Compartment,wall_n:Wall Negative,wall_p:Wall Positive,lid:Lid]

// Rows
rows = 2;
columns = 4;

// Text on lid
lid_text = "Project Name";

// Compartment (mm per side)
comp_w = 20; // [10:40]

// Compartment depth
comp_z = 5; //  [5:15]

// Wall thickness
wall = 1;  // [0.5,1,1.5,2]

// Adjust this based on printer to get tight fit
fit = 0.3;

// Lid thickness
lid_th = 2; // [1,1.5,2,2.5]

module interlock_p (h) {
	// Create polygon to extrude
	linear_extrude (height = h)
	polygon ([[0, 3], [0, -3], [1, -4], [2, -4], [2, 4], [1, 4]]);
}

module _interlock_n (h) {
	// Create polygon to extrude
	linear_extrude (height = h)
	polygon ([[0, 3 + fit], [0, -3 - fit], [1, -4 - fit], [2 + fit, -4 - fit],
				[2 + fit, 4 + fit], [1, 4 + fit]]);
}

module interlock_n (width, height) {
	difference () {
		translate ([-3, -width / 2, 0])
		cube ([3, width, height]);

		// Remove interlock
		translate ([-3, 0, 0])
		_interlock_n (height);
	}
}

// Rounded cutout for easier pickup
module cutout (x, y) {
	union () {
		translate ([-x/2, 0, y * 0.5])
		rotate ([0, 90, 0])
		cylinder (h = x, r = y * 0.5);

		translate ([0, 0, y])
		cube ([x, y, y], center = true);
	}
}

// Compartment
module compartment (comp_x, comp_y, comp_z, wall) {
	difference () {
		translate ([0, 0, (comp_z / 2) + 0.5 * wall])
		cube ([comp_x + 2 * wall, comp_y + 2 * wall, comp_z + wall], center = true);

		// Empty space
		translate ([0, 0, wall])
		cutout (comp_x, comp_y);
	}

	// right interlock
	translate ([comp_x / 2 + wall - q, 0, 0])
	interlock_p (comp_z + wall);

	// Top interlock
	translate ([0, comp_y / 2 + wall - q, 0])
	rotate ([0, 0, 90])
	interlock_p (comp_z + wall);

	// left interlock
	translate ([-comp_x / 2 - wall + q, 0, 0])
	interlock_n (comp_y + 2 * wall, comp_z + wall);

	// bottom interlock
	translate ([0, -comp_y / 2 - wall + q, 0])
	rotate ([0, 0, 90])
	interlock_n (comp_y + 2 * wall, comp_z + wall);
}

module wall_p (width, h) {
	difference () {
		union () {
			translate ([0, -width / 2, 0])
			cube ([wall, width, h + lid_th + 3 * wall]);

			// Add interlock
			translate ([wall - q, 0, wall])
			interlock_p (h + lid_th + 2 * wall);

			// Add stop at bottom
			translate ([0, -width / 2, 0])
			cube ([wall + 2, width, wall]);
		}

		// Cut a groove for the top
		translate ([wall, -width / 2, h + wall])
		cube ([2, width, lid_th]);
	}
}

module wall_n (width, h) {

	difference () {
		union () {
			// interlock groove
			translate ([0, 0, wall])
			interlock_n (width, h + lid_th + 2 * wall);

			// Bottom stop
			translate ([-2 - wall, -width / 2, 0])
			cube ([2 + wall, width, wall]);
		}

		// Cut a groove for the top
		translate ([-2 - wall, -width / 2, h + wall])
		cube ([2, width, lid_th]);
	}
}

module lid (rows, columns, x, y) {
	translate([0, 0, (lid_th - fit) / 2])
	cube ([(rows * (x + (2 * wall) + 2)) + 3.5,
			(columns * (y + (2 * wall) + 2)) + 3.5, lid_th - fit], center = true);
	rotate ([0, 0, 90])
	translate ([0, 0, lid_th - q])
	writecube(text=lid_text, face="top", font="orbitron.dxf");
}

// Print all parts out
module print_part () {
	if (part == "compartment") {
		compartment (comp_w, comp_w, comp_z, wall);
	}
	else if (part == "wall_n") {
		rotate ([0, 90, 180])
		wall_n (comp_w, comp_z);
	}
	else if (part == "wall_p") {
		rotate ([0, -90, 0])
		wall_p (comp_w, comp_z);
	}
	else if (part == "lid") {
		lid (rows, columns, comp_w, comp_w);
	}
	// Print them all out
	else {
		compartment (comp_w, comp_w, comp_z, wall);
		translate ([comp_w / 2 + 4, 0, 0])
		wall_n (comp_w, comp_z);
		translate ([-comp_w / 2 - 4, 0, 0])
		wall_p (comp_w, comp_z);
	}
}

print_part ();

```


[User]
I'd like to create a customizable rack for holding small vials or test tubes, similar to the one I saw on Thingiverse (Customizable Cuvette/Vial Rack). I need it to have a few specific features and parameters.

First, I need to be able to choose between round or square holes for holding the vials. I need to specify the hole size (diameter for round, side length for square) and the hole depth. I also need to be able to set the number of rows and columns of holes, as well as the spacing between them. Additionally, I need to be able to control the thickness of the base of the rack.

I'd also like to have the option for skids underneath the rack to help prevent curling during printing. I need to be able to specify the height and diameter of these skids.

The rack needs to have a surrounding wall, and I'd like to specify its thickness as well. It would also be great to add material-saving through-holes in between the vial holders to reduce material usage and print time. I need to be able to turn these on/off and set their size.

Finally, I want to be able to rotate the rack along the x-axis (like tilting it forward) by a certain angle and have support structures automatically generated based on the angle.

I'm hoping the design will include rounded corners for structural integrity (which I can see is done in the original). I'm not sure if you can add this, but it'd be awesome.

I think the design is straightforward enough that you should not need to use any external libraries such as MCAD, BOSL, BOSL2, dotSCAD, NopSCADlib or BOLTS - the primitives should be enough.

[Assistant]
customized_rack_v3.scad:
```
//design and code by emanresu (http://www.thingiverse.com/Emanresu)
//This code generates a rack with round or square holes.

/* [Global] */

//round or square holes?
hole_shape=1; //[1:Round,0:Square]
//length of edge/diameter if square/round holes (mm)
hole_size=25;
//depth of hole (mm)
hole_depth=30;
//number of rows along the x axis
rows=6;
//number of columns along the y axis
columns=4;
//space between holes (mm)
spacing=1.6;
//thickness of bottom layer (mm)
bottom_thick=1.75;
//height of skids (mm)
skid_height=0.4;
//diameter of skids (mm)
skid_diameter=25;
//wall thickness (mm)
wall_thickness=5;
//material-saving through holes?
material_holes_on=1; //[1:Yes, 0:No]
//material-saving hole size (mm)
material_hole_size=4;
//rotation angle (degrees)
angle=0;

//set openSCAD resolution
$fa=1;
$fs=1;

angle2=(90-angle);
angled_pt1=cos(angle)*(hole_size*columns+spacing*(columns)+wall_thickness);
angled_pt2=sin(angle)*(hole_size*columns+spacing*(columns)+wall_thickness);
angled_pt3=cos(angle2)*(hole_depth+bottom_thick);
angled_pt4=sin(angle2)*(hole_depth+bottom_thick);

module holes(hole_shape,hole_size,hole_depth,rows,columns,spacing,bottom_thick) {
	//This module generates an array of holes with one corner at the origin
	//moves the array of holes to be alligned with a non-centered cube later
	//moves corner of array to origin, raises holes by bottom_thick

	translate([hole_size/2+spacing+wall_thickness/2, hole_size/2+spacing+wall_thickness/2, hole_depth/2+bottom_thick+0.5]) {

		//generating rows and columns of holes
		//columns are Y axis
		for (b=[0:columns-1]) {
			//rows are X axis
			for (i=[0:rows-1]) {
				translate([i*(hole_size+spacing), b*(hole_size+spacing), 0]) {
					//square or round holes?
					//value of 1 = circles
					if (hole_shape==1) {

						cylinder(r=hole_size/2, h=hole_depth+1, center=true);
					}
					//any value not equal to 1 generates square holes
					else {cube(size=[hole_size, hole_size, hole_depth+1], center=true);
					}

				}
			}
		}
	}

}

module material_holes(hole_shape,material_hole_size,hole_depth,rows,columns,spacing,bottom_thick) {
translate([hole_size+1.5*spacing+wall_thickness/2, hole_size+1.5*spacing+wall_thickness/2, hole_depth/2+bottom_thick]){
	//generating rows and columns of holes
		//columns are Y axis
		for (b=[0:columns-2]) {
			//rows are X axis
			for (i=[0:rows-2]) {
				translate([i*(hole_size+spacing), b*(hole_size+spacing), 0]) {
					//square or round holes?
					//value of 1 = circles
					if (hole_shape==1) {
						cylinder(r=material_hole_size, h=hole_depth+bottom_thick*4, center=true);
					}
					//any value not equal to 1 generates square holes
					else {cube(size=[material_hole_size, material_hole_size, hole_depth+bottom_thick], center=true);
					}
}
}
}
}
}

//takes an appropriately sized block and removes an array of holes
	rotate([angle,0,0])
difference() {
hull(){
	//main body

	cube(size=[rows*(hole_size+spacing)+wall_thickness, columns*(hole_size+spacing)+wall_thickness, bottom_thick+hole_depth], center=false);

//round the corners to avoid splitting
if (angle==0){
	translate([0,0,0]) cylinder(h=bottom_thick+hole_depth, d=wall_thickness, $fn=100);
	translate([rows*(hole_size+spacing)+spacing+wall_thickness/2, columns*(hole_size+spacing)+spacing+wall_thickness/2,0]) cylinder(h=bottom_thick+hole_depth, d=wall_thickness, $fn=100);
	translate([0, columns*(hole_size+spacing)+spacing+wall_thickness/2,0]) cylinder(h=bottom_thick+hole_depth, d=wall_thickness, $fn=100);
	translate([rows*(hole_size+spacing)+spacing+wall_thickness/2, 0,0]) cylinder(h=bottom_thick+hole_depth, d=wall_thickness, $fn=100);
}

}
//holes (improved resolution with $fn=100)
	holes(hole_shape,hole_size,hole_depth,rows,columns,spacing,bottom_thick, $fn=100);
//material holes to save mass
if (material_holes_on==1){
	material_holes(hole_shape,material_hole_size,hole_depth,rows,columns,spacing,bottom_thick, $fn=100);
	}

}

//Generate triangular support structures if angled
if (angle!=0) {

	translate([hole_size*rows+spacing*(rows)+wall_thickness-0.5,0,0])
	rotate([0,270,0])
	linear_extrude(height=(hole_size*rows+spacing*(rows)+wall_thickness))
	polygon(points=[
		[0,0],
		[0,angled_pt1],
		[angled_pt2,angled_pt1]
		]
	);
	translate([-0.5,0,0])
	rotate([0,270,180])
	linear_extrude(height=(hole_size*rows+spacing*(rows)+wall_thickness))
	polygon(points=[
		[0,0],
		[0,angled_pt3],
		[angled_pt4,angled_pt3]
		]
	);

}

//Generate corner skids to minimise curling
//origin skid
   translate([0,-angled_pt3,0]) cylinder(h=skid_height, d=skid_diameter, $fn=100);

//opposite corner skid
	translate([rows*hole_size+spacing*rows+wall_thickness/2, (cos(angle))*(wall_thickness+(columns*(hole_size)+spacing*(columns-1))),0]) cylinder(h=skid_height, d=skid_diameter, $fn=100);

//far y axis skid
	translate([0, (cos(angle))*(columns*hole_size+spacing*(columns)+wall_thickness/2),0]) cylinder(h=skid_height, d=skid_diameter, $fn=100);

//far x axis skid
	translate([rows*hole_size+spacing*(rows)+wall_thickness/2, -angled_pt3,0]) cylinder(h=skid_height, d=skid_diameter, $fn=100);

```


[User]
I need an OpenSCAD design for a motor mount, specifically for a square motor. It should be like a bracket or a support, with two "equerre" pieces mirrored.

Here are the basic parameters:

*   **Height_support:** This is the overall height of the support. Let's make it 40mm by default, but it needs to be adjustable.

*   **Thickness:** The thickness of the material used, maybe start at 2.5mm and be able to go up to 10mm

*   **Motor_center_hole_diameter:** This is the diameter of the hole in the top piece for the motor shaft, defaults to 10mm.

*   **Motor_mount_hole_diameter:** This is the diameter of the mounting holes for the motor, like 2mm by default

*   **Motor_mount_hole_spacing:**  The distance between the mounting holes, like 15mm

*   **Renforcement:** An option to add a reinforcement at the corner of each "equerre," a simple triangle piece. Can be "yes" or "no"

*   **Base_slot:**  The diameter for the slots where the base piece attaches to the vertical support. Default to 4mm

I want to have the ability to change all of these in a customizer. The design should have two of these "equerre" shapes, mirrored, which make a bracket. The base of the equerre should have an oblong slot for fasteners. The top piece should have the motor shaft hole and the motor mounting holes. Oh and the two parts should be joined into a single part. I guess I don't need separate parts.

[Assistant]
Square_motor_custom.scad:
```

//Height support
Height_support=40;

//thickness;
Thickness = 2.5;//[1:10]

//Diameter of the center hole motor
Motor_center_hole_diameter=10;

//Diameter of the motor mount holes
Motor_mount_hole_diameter=2;

//Diameter of the holes for fixing the equerre
Motor_mount_hole_spacing=15;

//use renforcement
Renforcement = "yes"; // [yes,no]

//Diameter of the slot holes for fixing the equerre
Base_slot=4;

//ignore variable values
H=Height_support / 1;
E=Thickness / 1;
D=Motor_center_hole_diameter/1;
d=Motor_mount_hole_diameter/1;
T=Base_slot/1;
M=Motor_mount_hole_spacing/1;

module equerre(){
		union(){
			//base
			difference(){
				cube([H/2,H,E]);
				union(){
					//Oblon
			      hull(){
			        translate([H/2-(E+T/2),E+T+H/10,-E]) cylinder(r=T/2, h=3*E);
			        translate([H/2-(E+T/2),H-E-T-H/10,-E])cylinder(r=T/2, h=3*E);
					}
				}

			}
if(Renforcement == "yes"){
		translate([H/2-E,E,E]) polyhedron(
			points=[[0,0,0],[E,0,0],[E,0,E],[0,0,E],[0,E,0],[E,E,0]],
			faces=[[0,1,2],[0,2,3],[0,1,5],[0,5,4],[3,2,5],[1,2,5],[5,3,4],[0,4,3]
					]
				);
	}

			//haut
			difference(){
				cube([H/2,E,H]);
				rotate([90,0,0]){
					union(){
						//trou axe moteur
						translate([0,H/2,-2*E])cylinder(r=D/2,h=4*E);
						//trou fixation moteur
						translate([M/2+d/2,H/2,-2*E])cylinder(r=d/2,h=4*E);
					}
				}
			}
		}
}

	union(){
		equerre();
		mirror([1,0,0])equerre();
	}

```


[User]
I'd like to create a spiral shape, similar to a Fermat spiral, using OpenSCAD. I've been experimenting with a crude approach involving hulling cylinders along a spiral path, but I'd like a more robust, customizable solution.

Specifically, I'm aiming for a design with these features:

1.  **Customizable Spiral:** The spiral should follow the general form of a Fermat spiral, where the radial distance from the center is proportional to the square root of the angle. I'd like parameters to control:
    *   The scaling factor (the 'a' term, that affects how much the spiral expands).
    *   The starting angle (to determine where the spiral begins).
    *   The number of rotations, or more usefully, the end angle of the spiral.
    *   The step size for calculating the spiral points (to control how smooth it looks).

2.  **Profile Control:** Instead of just cylinders, I want the spiral to have a user-defined 2D profile that is swept along the path. I'm thinking of a polygon, which I'd like to be able to specify with a list of points.

3. **Extrusion:** After sweeping the profile, the resulting shape should be extruded to a specified height.

4. **Optional Rounding:** I'd like an option to round the corners of the 2D profile to smooth the spiral's edges. This might use some kind of offset/rounding on the 2D profile before the sweep.

I'd like to use the `linear_extrude()` method to handle the extrusion, and any useful utilities from the `BOSL2` library for the 2D profile creation (like for the rounding).

I'm not sure what the best way to handle the sweeping/profile portion of this design, so I'm hoping you can come up with a nice parametric approach. I’m imagining this might need a combination of the `rotate_extrude()` function, along with transformation matrices on the 2D profile as it moves along the path of the Fermat spiral. I'm also not sure what the best way is to round 2D polygons. I'm happy if it uses helper functions/modules from libraries.

[Assistant]
fermat-spiral.scad:
```
// http://www.wolframalpha.com/input/?i=Fermat+spiral

a = 10;
b = 100;

incrementBy = 10;

height = 18;

wallThickness = 20;

for(t=[0:incrementBy:1000])
hull(){
translate([a*sqrt(t)*cos(t),a*sqrt(t)*sin(t),0])
cylinder(r=wallThickness/2,h=height);
translate([a*sqrt(t+incrementBy)*cos(t+incrementBy),a*sqrt(t+incrementBy)*sin(t+incrementBy),0])
cylinder(r=wallThickness/2,h=height);
}

```


[User]
I need a parametric OpenSCAD design for a shim or mounting plate that works with Makeblock style beams. I want to be able to adjust the thickness, overall length, and hole diameter.

Specifically, the design should have rounded edges (a small radius of 2mm seems good). The length should be customizable via a `length` parameter, the thickness with a `thickness` parameter, and the hole diameter with a `holeDia` parameter. The width should be fixed at 24mm.

The mounting holes need to be positioned to match the Makeblock beam grid. This means they should be in rows spaced 16mm apart in the x-direction, and 16mm apart in the y-direction, with two holes in each row and holes spaced 8mm from the center in the Y direction. I'm using M4 screws so I need to be able to use parameters that will generate a hole appropriate for tapping, a tight fit, or a loose fit.

I would prefer not to use any external libraries if possible, but if you do use them please be explicit about it.

Essentially, I'm looking for something like the 0824shim.scad file I found, but completely re-implemented without relying on the original code.

[Assistant]
0824shim.scad:
```
// Created by Heindal at Thingiverse on March 2015

// Values for user to edit

// Thickness of shim, mounting plate, or standoff
thickness = 2.5; // [1:25]

// Length of shim
length = 24; // [8,12,24,40,56]

// Hole Diameter
holeDia = 4.15; // [3.4:3.4mm for Tap, 4.15:4.15mm for Tight Fit, 4.3:4.3mm for Loose Fit]

/* [Hidden] */
// Calculated values - edit at your own risk
width = 24;

module rounded_box(l,w,h,r_edge){

cube(size=[l-2*r_edge,w-2*r_edge,h ],center=true);

for (x = [l/2-r_edge,-(l/2-r_edge) ]) {
	for (y = [(w/2-r_edge),-(w/2-r_edge)]) {
		translate([x,y,0]) cylinder(r1=r_edge,r2=r_edge,h=h,center=true,$fn=40);
	}
}
translate([0,w/2-r_edge,0]) cube(size=[l-2*r_edge,2*r_edge,h ],center=true);
translate([0,-(w/2-r_edge),0]) cube(size=[l-2*r_edge,2*r_edge,h ],center=true);
translate([(l/2-r_edge),0,0]) cube(size=[2*r_edge,w-2*r_edge,h ],center=true);
translate([-(l/2-r_edge),0,0]) cube(size=[2*r_edge,w-2*r_edge,h ],center=true);

}

difference() {
	rounded_box(length,width,thickness,2);
	// mounting holes to match the rail
	for (x = [-16*floor(length/16)/2 : 16 : 16*floor(length/16)/2]) {
		for (y = [-8,8]) {
			translate([x,y,0]) cylinder(r=holeDia/2, h=thickness+1, center=true, $fn=16);
		}
	}
}

```


[User]
I'd like to design a ball-in-a-box toy, and I'd like it to be parametric so I can easily adjust the sizes. The box itself should be a hollow cube, and the ball should move freely within the hollow space. I'm aiming for a design that can be 3D printed without supports.

Specifically, I need to define the following parameters:

*   `ball_radius`: The radius of the ball.
*   `cube_size`: The overall size of the cube (edge length).
*   `inner_void_radius`: The radius of the spherical hollow space inside the cube. This should be somewhat larger than the `ball_radius`, but smaller than `cube_size`. I'd like to make sure the ball has space to move freely.

The `hollow_cube` module should create the cube with the spherical void. The `inner_ball` module should create the ball. The final output should show both the hollowed cube and the ball inside, which should be possible to achieve by calling `hollow_cube(); inner_ball();` . The final design must ensure the sphere is positioned correctly.

I'd also like to have some way of setting the `$fn` variable for a higher level of detail.

I want to see how the design looks and would like the design generated from scratch in the response. I would like this design to work well with OpenSCAD.

[Assistant]
ball-in-box.scad:
```
$fn=100;

// The radius of the inner ball.
ball_size = 8.5;
// the size of the cube
cube_size = 16;
// radius of the empty space inside the cube. Ideally about 60-70% of the size of the cube
inner_void_size = 10.5;

module hollowed_square(){
    translate([0,0,cube_size/2]){
        difference(){
            cube(size=cube_size, center=true);
            sphere(inner_void_size);
        }
    }
}

module inner_ball(){
    translate([0,0,ball_size]){
        sphere(ball_size);
    }
}

hollowed_square();
inner_ball();
```


[User]
Hey, I'm looking for some help designing a customizable wall bracket in OpenSCAD. I've seen some designs online, but I'd like to make one that's tailored to my needs and is also parametric.

Essentially, I need a bracket that clamps onto a shelf or object, but instead of a screw hole like most designs have, I want to be able to attach it to the wall using a 3M Command strip. Specifically, I'm using the small size strips, which are about 16mm wide and 30mm tall.

Here's a breakdown of the features I want to be able to adjust:

*   **Clamp Size:** The thickness of the shelf or object that the bracket will be clamping onto.
*   **Material Thickness:** The thickness of the bracket itself, which affects the overall strength and flexibility.
*   **Rim Height:** The height of the raised edge at the front of the bracket, which helps secure the clamped object.
*   **Corner Bevel Size:** The size of the bevel on the bracket's corners, which adds strength.
*   **Bracket Width:** The overall width of the bracket.
*  **Tail Height:** The height of the bracket's "tail" - the part that presses against the wall, where the Command Strip will attach. This will need to accommodate the Command Strip, obviously.
*   **Command Strip Width:** The width of the Command Strip (16mm for the small size, but I'd like this to be customizable).
*   **Command Strip Height:** The height of the Command Strip (30mm for small, but again, I want it to be customizable)
*   **Command Strip Offset:** How far down the tail the top of the command strip is placed - this is important so that I can customize the bracket further to sit slightly above where it is attached to the wall.

I'm aiming for a design where the main bracket part clamps on, and the "tail" part that attaches to the wall is flat and sized to fit the Command strip. I'd like to be able to adjust all of the sizes to fit various shelves and strips. Can you generate an OpenSCAD file (or files) for me? I don't need the code to include any libraries.

[Assistant]
Customizable_Bracket.scad:
```
// Customizable Wall Bracket
// (c) 2013 Wouter Robers
// remixed 2015 by Fritz Toch

// variable description

// How thick is the thing you want to bracket, in mm?
ClampSize=12;

// Material thickness (thicker makes stronger, but less flexible) in mm?
Thickness=3;

// Height of the rim in the front of the bracket, in mm?
RimHeight=7;

// Corner bevel size (bigger bevel gives better strength) in mm?
Corner=3;

// Width of bracket, in mm?
BracketWidth=16;

// Height of bracket 'tail'-the part against the wall, in mm?
TailHeight=30;

MakeBracket();

module MakeBracket(){
rotate([0,0,-90]) difference(){
linear_extrude(height = BracketWidth)
polygon([[0,0],[0,TailHeight+Thickness],[Thickness,TailHeight+Thickness],[Thickness,Thickness+Corner],[Thickness+Corner,Thickness],[Thickness+ClampSize-Corner,Thickness],[Thickness+ClampSize,Thickness+Corner],[Thickness+ClampSize,Thickness+RimHeight],[2*Thickness+ClampSize,Thickness+RimHeight],[2*Thickness+ClampSize,Corner],[2*Thickness+ClampSize-Corner,0]]);

}
}

```