[User]
Hey, I'm looking to create a parametric filament guide for my 3D printer, and I need some help with the OpenSCAD code. I've been using a modified version of a design I found on Thingiverse (thing:508896), but the original code is a bit of a mess and I'd like a cleaner, more flexible solution. I'm aiming for something that allows for easy adjustments through parameters.

Basically, I need a guide that has a horizontal arm connecting to a vertical stem, and then a guide tube coming off the top. Here's a breakdown of the parameters I need:

*   **`Len`:** The length of the horizontal arm, measured from the end of the arm to the center of the vertical stem. The original design had this at 136mm but I'd like to easily adjust it. I used 116mm for my Kossel printer.
*   **`Ht`:** The height of the vertical stem, measured from the base to the center line of the filament guide.  I had this at 70mm on my Kossel.
*   **`Filament_Type`:**  An option to choose the filament diameter, with `1` for 1.75mm, `3` for 3mm, and `0` for both (meaning it supports both filaments).
*   **`Filament_Slot`:** A boolean option ( `1` for yes, `0` for no) to add a slotted opening at the top of the guide tube, to make it easier to slide the filament in and out.
*   **`Guide_ZRot`:** The rotation angle of the guide tube around the Z axis. Negative values should rotate clockwise. I use -30 on my Kossel printer to line it up.
*   **`Guide_X_Offset`:** An X offset for the guide tube. This is typically not necessary, but it should be included as an option in case it's needed when the guide tube is rotated.
*   **`Fil1_OD`:** The diameter of the hole for the 1.75mm filament.
*   **`Fil3_OD`:** The diameter of the hole for the 3mm filament.

Additionally, there are several "hidden" variables in the existing code which I think should become parameters, or otherwise just be handled logically:
*   **`Fil1_Tap_OD`:** The diameter of the taper for the 1.75mm filament opening.
*  **`Fil1_Tube_OD`:** The diameter of the 1.75mm filament bowden tube.
* **`Fil1_Slot_OD`:** The diameter of the slotted opening for 1.75mm.
*  **`Fil3_Tap_OD`:** The diameter of the taper for the 3mm filament opening.
*  **`Fil3_Tube_OD`:** The diameter of the 3mm filament bowden tube.
* **`Fil3_Slot_OD`:** The diameter of the slotted opening for 3mm.
*   **`OD`**: The base diameter of the vertical stem.
*   **`OD18`**:  The outside diameter of the main part of the guide tube.
*   **`SpongeDepth`:** The depth of the sponge insert.
*  **`SS_X_Offset`:** The x offset of the set screw hole.
*  **`SS_Z_Offset`:** The z offset of the set screw hole.
*   **`SS_Ang`:** The angle of the set screw hole.

I think the rest of those hardcoded internal variables are just internal intermediate calculations that can be handled in the SCAD. You don't need to worry about replicating all the intermediate variables as long as the final result matches the design.

The design also has some rounded box-like shapes at the top. It would be nice to have a separate module for those, and the rounding itself is a sub-module I would like to be able to reuse, just in case.

Also, there's a sponge insert in the middle - you can treat that as a separate module too.

I'm hoping for a fairly modular design, with separate modules for the arm, stem, guide tube, and transitions.  I'd also appreciate using the `hull()` function where appropriate to get smooth transitions between parts.

I’d like the code to be well-commented too, so it's easier to understand and modify.

I'd like to avoid using any external libraries and keep it vanilla OpenSCAD. I don't think I need any special modules in this particular project. Let me know if you have any questions!

[Assistant]
GuideTubeMod_Rev16.scad:
```
//Remix of Guide Tube to convert to openscad and make some dimensions Parametric
//Remixed from: http://www.thingiverse.com/thing:508896
//8/5/2016  By: David Bunch
//
//This remix allows you to:
//1. Adjust the Length of the Guide Tube
//2. Adjust the Height of the Guide Tube Stem
//3. Adjust the Z Angle of the Guide Tube
//4. Filament opening option for either 1.75mm, 3mm or Both with variable Filament_Type
//5. Option for slotted Filament opening with variable Filament_Slot
//6. You can also adjust the hole diameters used and a few other odd variables

//These 3 variables used to show the complete part in the View Area (Comment out if you do not want this)
//$vpt=[19,-66,18];
//$vpr =[53.6,0,237.3];
//$vpd =580;

//CUSTOMIZER VARIABLES

//1. Length of Arm (136 original)
Len = 136;                  //Length from End to center of Vertical Guide Tube (136mm original)
                            //Original shorter Guide Tube arm is 109mm
                            //I used 116mm for my Foger Tech Kossel
//2. Height of the Guide Tube Stem
Ht = 70;                    //Height from Base to Center Line of Filament Horizontal Guide

//3. Filament Type (1 = 1.75mm, 3 = 3mm or 0 = both)
Filament_Type = 0;          //1 = 1.75mm filament, 3 = 3mm filament, 0 = 1.75 & 3mm

//4. Filament Slotted opening in top (1 = Yes, 0 = No)
Filament_Slot = 0;          //1 = Yes, 0 = No

//5. Rotation Angle of Guide Tube (negative is clockwise)
Guide_ZRot = 0;             //I used -30 for my Folger Tech Kossel

//6. Guide Tube X offset (Not usually needed)
Guide_X_Offset = 0;         //May need this if you rotate the guide tube

//7. Diameter of hole for 1.75mm Filament
Fil1_OD = 3;

//8. Diamenter of hole for 3mm Filament
Fil3_OD = 4;

/* [Hidden] */

Tran_Len = Len - 7.13;     //Original is 128.87mm
TR_Top = Ht-19-45.39;       //Need this variable to be able to change transition height at top of Stem
SpongeDepth = 16;           //Originally 21.44mm
SpongeHt = SpongeDepth - 10.44;
TranArm_1st = 36.75;        //1st Transition distance at Arm Connection
SS_X_Offset = 1.75;         //Set Screw X Offset (I think this is used for a set screw)
SS_Z_Offset = .3;           //Set Screw Z Offset
SS_Ang = -20;               //Set Screw X rotation (-10 was close to original)
OD = 20;                    //Diameter of Base of the Vertical Stem
OD18 = 18.0;                //Outside Diameter of Main Part of Guide Tube

//These 4 diameters are used at the bottom of Stem (Not sure what they are used for,but left them in)
OD23 = 2.3;
OD3 = 3.0;
OD35 = 3.5;
OD43 = 4.3;

Fil1_Tap_OD = 5.88;             //Taper opening for 1.75mm Filament
Fil1_Tube_OD = 4.47;            //Bowden Tube Diameter for 1.75mm Filament
Fil1_Slot_OD = Fil1_OD + 2;     //Diameter to use for top of Slotted Opening for 1.75mm Filament
Fil1_OD_Res = (round(((Fil1_Tube_OD * 3.14)/4)/.7)*4);

Fil3_Tap_OD = 7.88;             //Taper opening for 3mm Filament
Fil3_Tube_OD = 6.48;            //Bowden Tube Diameter for 3mm Filament
Fil3_Slot_OD = Fil3_OD + 2;     //Diameter to use for top of Slotted Opening for 3mm Filament
Fil3_OD_Res = (round(((Fil3_Tube_OD * 3.14)/4)/.7)*4);

OD_Res = (round(((OD * 3.14)/4)/.7)*4);         //Resolution of Outside Diameter
OD18_Res = (round(((OD18 * 3.14)/4)/.7)*4);

echo(TR_Top = TR_Top);
echo(Tran_Len = Tran_Len);
echo(OD18_Res = OD18_Res);

module BotGuideHull()
{
    difference()
    {
        rotate([0,90,0])
        cylinder(d=OD18,h=27,$fn=OD18_Res,center=true);
        translate([-15,-15,-5.27])
        cube([30,30,30]);
    }
}
//Used to reference original to check how close it matches
//module GuideTube()
//{
//    translate([0,6,0])
//    color("red",.5)
//    import("Guide-tube_holder_and_filament_filter.stl", convexity = 5);
//}
//GuideTube();
module Guide()
{
    union()
    {
        translate([0,-Len,Ht])
        rotate([0,90,0])
        translate([0,0,-15])
        {
            cylinder(d1=OD18-3,d2=OD18,h=1.5,$fn=OD18_Res);
            translate([0,0,1.5])
            cylinder(d=OD18,h=27,$fn=OD18_Res);
            translate([0,0,28.5])
            cylinder(d1=OD18,d2=OD18-3,h=1.5,$fn=OD18_Res);
        }
        HullMidTop();
    }
}
module GuideTubeRotate()
{
    translate([Guide_X_Offset,-Len,Ht])
    rotate([0,0,Guide_ZRot])
    translate([0,Len,-Ht])      //Translate back to origin before rotating
    Guide();
}
module TopCube()
{
    hull()
    {
        translate([-4.5,-(Len + 7.5),Ht])
        RndBox(9,15,10,2);
        translate([-3.5,-(Len + 6.5),Ht+10])
        RndBox(7,13,1,1);
    }
}
module InsertSponge()
{
    translate([0,-Len,Ht-SpongeHt])
    {
        hull()
        {
            translate([-.825,-3.825,0])
            cube([1.65,7.65,.1]);
            translate([-2.71,-5.71,SpongeDepth])
            cube([5.42,11.42,.1]);
        }
        hull()
        {
            translate([-2.71,-5.71,SpongeDepth])
            cube([5.42,11.42,.1]);
            translate([-3.21,-6.21,SpongeDepth+.5])
            cube([6.42,12.42,.1]);
        }
        translate([-3.21,-6.21,SpongeDepth+.5])
        cube([6.42,12.42,1]);
    }
}
module HullMidTop()
{
    hull()
    {
        translate([0,-Len,Ht])
        rotate([0,90,0])
        color("tan")
        cylinder(d=OD18,h=11.6,$fn=OD18_Res,center=true);
        TopCube();
    }
}
//This module is called by Rounded Box
module RndTop(Rnd_OD = 9,Rnd_Ht = 5,Rnd_Res)
{
    Rnd_Rad = Rnd_OD / 2;
    translate([-Rnd_Rad,Rnd_Rad,0])
    difference()
    {
        cylinder(d=Rnd_OD*2,h=Rnd_Ht+2,$fn=Rnd_Res);
        translate([0,0,-1])
        cylinder(d=Rnd_OD,h=Rnd_Ht+4,$fn=Rnd_Res);
        translate([-Rnd_OD,0,-1])
        cube([Rnd_OD*2,Rnd_OD,Rnd_Ht+4]);
        translate([-Rnd_OD,-Rnd_OD,-1])
        cube([Rnd_OD,Rnd_OD+1,Rnd_Ht+4]);
    }
}
//Rounded Box Module
module RndBox(R_Len=9,R_Wid=15,R_Ht=10,R_OD=2)
{
    R_Rad = R_OD / 2;
    difference()
    {
        cube([R_Len,R_Wid,R_Ht]);
        translate([0,0,-1])
        rotate([0,0,-90])
        RndTop(R_OD,R_Ht,12);
        translate([R_Len,0,-1])
        RndTop(R_OD,R_Ht,12);

        translate([0,R_Wid,-1])
        rotate([0,0,180])
        RndTop(R_OD,R_Ht,12);
        translate([R_Len,R_Wid,-1])
        rotate([0,0,90])
        RndTop(R_OD,R_Ht,12);
    }
}
module Filament_175()
{
    translate([-5,-Len,Ht])
    rotate([0,-90,0])
    cylinder(d=Fil1_Tube_OD,h=11,$fn=Fil1_OD_Res);      //1.75 Filament Bigger Opening
    translate([5,-Len,Ht])
    rotate([0,90,0])
    cylinder(d=Fil1_Tube_OD,h=11,$fn=Fil1_OD_Res);      //1.75mm Filament Bigger Opening

    translate([-14.51,-Len,Ht])
    rotate([0,-90,0])
    cylinder(d1=Fil1_Tube_OD,d2=Fil1_Tap_OD,h=.51,$fn=Fil1_OD_Res);      //1.75mm Filament Taper Opening
    translate([14.5,-Len,Ht])
    rotate([0,90,0])
    cylinder(d1=Fil1_Tube_OD,d2=Fil1_Tap_OD,h=.51,$fn=Fil1_OD_Res);      //1.75mm Filament Taper Opening

    translate([0,-Len,Ht])
    rotate([0,90,0])
    cylinder(d=Fil1_OD,h=40,$fn=Fil1_OD_Res,center=true);      //1.75mm Filament drill thru
}
module Filament_3()
{
    translate([0,-Len,Ht])
    rotate([0,90,0])
    cylinder(d=Fil3_OD,h=40,$fn=Fil3_OD_Res,center=true);      //3mm Filament drill thru
    translate([-5,-Len,Ht])
    rotate([0,-90,0])
    cylinder(d=Fil3_Tube_OD,h=11,$fn=Fil3_OD_Res);      //3mm Filament Bigger Opening
    translate([5,-Len,Ht])
    rotate([0,90,0])
    cylinder(d=Fil3_Tube_OD,h=11,$fn=Fil3_OD_Res);      //3mm Filament Bigger Opening

    translate([-14.51,-Len,Ht])
    rotate([0,-90,0])
    cylinder(d1=Fil3_Tube_OD,d2=Fil3_Tap_OD,h=.51,$fn=Fil3_OD_Res);      //3mm Filament Taper Opening
    translate([14.5,-Len,Ht])
    rotate([0,90,0])
    cylinder(d1=Fil3_Tube_OD,d2=Fil3_Tap_OD,h=.51,$fn=Fil3_OD_Res);      //3mm Filament Taper Opening
}

module CutTopGuideTube()
{
    InsertSponge();
    if (Filament_Type != 0)
    {
        if (Filament_Slot == 1)
        {

            if (Filament_Type == 1)
            {
                hull()
                {
                    translate([0,-Len,Ht])
                    rotate([0,90,0])
                    cylinder(d=Fil1_OD,h=40,$fn=Fil1_OD_Res,center=true);      //1.75mm Filament drill thru
                    translate([0,-Len,Ht+10])
                    rotate([0,90,0])
//Make it a tapered slot 10mm up
                    cylinder(d=Fil1_Slot_OD,h=40,$fn=Fil1_OD_Res,center=true);
                }
            } else
            {
                hull()
                {
                    translate([0,-Len,Ht])
                    rotate([0,90,0])
                    cylinder(d=Fil3_OD,h=40,$fn=Fil1_OD_Res,center=true);      //3mm Filament drill thru
                    translate([0,-Len,Ht+10])
                    rotate([0,90,0])
//Make it a tapered slot 10mm up
                    cylinder(d=Fil3_Slot_OD,h=40,$fn=Fil1_OD_Res,center=true);
                }
            }
        }
    }
    if (Filament_Type == 1)
    {
        Filament_175();
    } else if (Filament_Type == 3)
    {
        Filament_3();
    } else
    {
        translate([0,0,3])          //Add 3mm to drill thru for 3mm filament
        Filament_3();
        translate([0,0,-4])         //Subtrace 4mm to drill thru for 1.75mm filament
        Filament_175();
    }
//Not sure what this hole is, but probably for set screw to keep Guide tube in place
    translate([9.5,-Len+SS_X_Offset,Ht-SS_Z_Offset])
    rotate([SS_Ang,0,0])
    cylinder(d=2.7,h=50,$fn=16,center=true);
    translate([-9.5,-Len+SS_X_Offset,Ht-SS_Z_Offset])
    rotate([SS_Ang,0,0])
    cylinder(d=2.7,h=50,$fn=16,center=true);
//Taper the opening of the set screw holes a little
    translate([9.5,-Len+SS_X_Offset-1,Ht-SS_Z_Offset+.2])
    rotate([SS_Ang-8,0,0])
    translate([0,0,8])
    cylinder(d1=2.7,d2=3.7,h=1,$fn=16);
    translate([-9.5,-Len+SS_X_Offset-1,Ht-SS_Z_Offset+.2])
    rotate([SS_Ang-8,0,0])
    translate([0,0,8])
    cylinder(d1=2.7,d2=3.7,h=1,$fn=16);
    translate([0,-Len,Ht-18.97])
    scale([1,1,1])
    ChamBotGuide();
}
//These profiles are used for the Arm transitions
module BotProfile1()
{
    linear_extrude(height = .1, center = false, convexity = 10)polygon(points =
    [[6.42,1.8],[9.59,4.38],[4.98,10.05],[4.59,10.49],[4.15,10.9],
    [3.68,11.26],[3.18,11.58],[2.65,11.85],[2.49,11.92],[-2.49,11.92],
    [-2.65,11.85],[-3.18,11.58],[-3.68,11.26],[-4.15,10.9],[-4.59,10.49],
    [-4.98,10.05],[-9.59,4.38],[-6.42,1.8]]);
}
module BotProfile2()
{
    linear_extrude(height = .1, center = false, convexity = 10)polygon(points =
    [[-12.63,4.06],[-8.59,0.78],[8.58,0.77],[12.63,4.06],[6.66,11.41],
    [6.19,11.94],[6.13,12],[6.12,12.01],[6.06,12.06],[5.55,12.54],
    [5.54,12.55],[5.47,12.6],[4.92,13.03],[4.9,13.04],[4.83,13.08],
    [4.25,13.45],[4.22,13.46],[4.15,13.5],[3.54,13.81],[3.42,13.86],
    [3.39,13.88],[2.89,14.08],[-1.33,14.08],[-2.89,14.08],[-3.39,13.88],
    [-3.42,13.86],[-3.54,13.81],[-4.15,13.5],[-4.17,13.49],[-4.25,13.45],
    [-4.83,13.08],[-4.85,13.07],[-4.92,13.03],[-5.47,12.6],[-5.48,12.59],
    [-5.55,12.54],[-6.06,12.06],[-6.07,12.06],[-6.13,12],[-6.6,11.47],
    [-6.66,11.41]]);
}
module BotProfile3()
{
    linear_extrude(height = .1, center = false, convexity = 10)polygon(points =
    [[-5.14,1],[-4.14,0],[4.14,0],[5.14,1]]);
}
module BotProfile3A()
{
    linear_extrude(height = .1, center = false, convexity = 10)polygon(points =
    [[-5.14,1],[-5.15,1.47],[-5.18,1.82],[-5.27,2.15],[-5.42,2.47],
    [-5.62,2.76],[-5.88,3],[-6.25,3.3],[-6.39,3.43],[-6.5,3.55],
    [-6.57,3.63],[-6.62,3.7],[-6.67,3.77],[-6.71,3.84],[-6.75,3.91],
    [-6.78,3.98],[-6.82,4.05],[-6.85,4.12],[-6.87,4.19],[-6.9,4.27],
    [-6.92,4.34],[-6.94,4.44],[-6.95,4.5],[-6.96,4.57],[-6.97,4.64],
    [-6.98,4.72],[-6.98,4.85],[-6.98,4.99],[-6.96,5.14],[-6.94,5.27],
    [-6.91,5.41],[-6.88,5.49],[-6.82,5.64],[-6.79,5.71],[-6.75,5.79],
    [-6.71,5.87],[-6.66,5.94],[-6.61,6.01],[-6.54,6.11],[-3.99,9.24],
    [-3.86,9.4],[-3.73,9.54],[-3.59,9.69],[-3.45,9.81],[-3.31,9.94],
    [-3.16,10.06],[-3.01,10.18],[-2.84,10.29],[-2.68,10.39],[-2.52,10.48],
    [-2.37,10.57],[-2.21,10.65],[-2.04,10.72],[-1.88,10.79],[-1.71,10.85],
    [-1.54,10.91],[-1.37,10.96],[-1.19,11],[-1.02,11.04],[-0.85,11.07],
    [-0.67,11.1],[-0.5,11.12],[-0.33,11.13],[-0.15,11.14],[0,11.14],
    [0.15,11.14],[0.33,11.13],[0.5,11.12],[0.67,11.1],[0.85,11.07],
    [1.02,11.04],[1.19,11],[1.37,10.96],[1.54,10.91],[1.71,10.85],
    [1.88,10.79],[2.04,10.72],[2.21,10.65],[2.37,10.57],[2.52,10.48],
    [2.68,10.39],[2.84,10.29],[3.01,10.18],[3.16,10.06],[3.31,9.94],
    [3.45,9.81],[3.59,9.69],[3.73,9.54],[3.86,9.4],[3.99,9.24],
    [6.54,6.11],[6.61,6.01],[6.66,5.94],[6.71,5.87],[6.75,5.79],
    [6.79,5.71],[6.82,5.64],[6.88,5.49],[6.91,5.41],[6.94,5.27],
    [6.96,5.14],[6.98,4.99],[6.98,4.85],[6.98,4.72],[6.97,4.64],
    [6.96,4.57],[6.95,4.5],[6.94,4.44],[6.92,4.34],[6.9,4.27],
    [6.87,4.19],[6.85,4.12],[6.82,4.05],[6.78,3.98],[6.75,3.91],
    [6.71,3.84],[6.67,3.77],[6.62,3.7],[6.57,3.63],[6.5,3.55],
    [6.39,3.43],[6.25,3.3],[5.88,3],[5.62,2.76],[5.42,2.47],
    [5.27,2.15],[5.18,1.82],[5.15,1.47],[5.14,1]]);
}
module TransAtColumn()
{
    translate([0,-Len+12,0])
    rotate([90,0,0])
    linear_extrude(height = .1, center = false, convexity = 10)polygon(points =
    [[0.29,11.29],[-0.29,11.29],[-0.62,11.27],[-0.78,11.25],[-1.11,11.19],
    [-1.45,11.12],[-1.61,11.07],[-1.93,10.96],[-1.96,10.95],[-2.27,10.81],
    [-2.28,10.81],[-2.43,10.73],[-2.47,10.72],[-2.76,10.55],[-2.91,10.45],
    [-2.95,10.43],[-3.11,10.32],[-3.14,10.3],[-3.42,10.07],[-3.69,9.83],
    [-3.72,9.81],[-3.72,9.81],[-3.97,9.53],[-4,9.5],[-6.55,6.38],
    [-6.85,6.01],[-7.01,5.78],[-7.09,5.63],[-7.11,5.56],[-7.17,5.42],
    [-7.2,5.34],[-7.23,5.21],[-7.25,5.09],[-7.27,4.94],[-7.27,4.69],
    [-7.24,4.48],[-7.23,4.42],[-7.21,4.33],[-7.19,4.26],[-7.14,4.12],
    [-7.11,4.05],[-7.05,3.92],[-5.52,1.15],[-5.31,0.99],[-5.14,0.99],
    [-5.31,0.99],[-5.31,0.99],[-5.31,0.95],[-4.36,0],[4.37,0],
    [5.32,0.95],[5.32,0.99],[5.31,0.99],[5.52,1.15],[7.05,3.92],
    [7.11,4.05],[7.14,4.12],[7.19,4.26],[7.21,4.33],[7.23,4.42],
    [7.26,4.61],[7.27,4.69],[7.27,4.94],[7.25,5.09],[7.23,5.21],
    [7.2,5.34],[7.17,5.42],[7.11,5.56],[7.09,5.63],[7.01,5.78],
    [6.85,6.01],[6.55,6.38],[4,9.5],[3.98,9.53],[3.72,9.8],
    [3.72,9.81],[3.69,9.83],[3.42,10.07],[3.14,10.3],[3.11,10.32],
    [2.95,10.43],[2.91,10.45],[2.76,10.55],[2.47,10.72],[2.43,10.73],
    [2.28,10.81],[2.27,10.81],[1.96,10.95],[1.93,10.96],[1.61,11.07],
    [1.45,11.12],[1.11,11.19],[0.78,11.25],[0.62,11.27]]);
}
//This module transitions from the Arm the Vertical Stem
module ColumnTransition()
{
    hull()
    {
        TransAtColumn();        //Profile of Arm at 12mm from center of Vertical Stem
        translate([0,-Len,0])
        cylinder(d=OD,h=14.74,$fn=OD_Res);      //Transition to Bottom section of Vertical Stem
    }
}
//Torus to cut around the top of the stem below the Guide tube
module ChamBotGuide()
{
    rotate_extrude(convexity = 10, $fn = 72)
    translate([14.8, 0, 0])
    circle(r = 10, $fn = OD18_Res);
}

module Arm()
{
    translate([0,0,0])
    rotate([90,0,0])
    union()
    {
//Bottom of Guide Tube Base had to be hulled seperately to get the correct transition
        hull()
        {
            translate([-6.4196,0,0])
            cube([12.8391,1.8003,.1]);
            translate([-8.538,0,TranArm_1st])
            cube([17.1536,.7734,.1]);
        }

//Where guide slides into Spool Holder Base
        hull()
        {
            BotProfile1();
            translate([0,0,TranArm_1st])
            BotProfile2();
        }
//This is the top of the base Guide tube transition to the Guide Tube Column
        hull()
        {
            translate([0,0,TranArm_1st])
            BotProfile2();
            translate([0,0,Tran_Len])
            BotProfile3A();
        }
//Bottom of Guide to the Guide Tube Column
        hull()
        {
            translate([-8.538,0,TranArm_1st])
            cube([17.1536,.7734,.1]);
            translate([0,0,Tran_Len])
            BotProfile3();
        }
    }
}
module Stem()
{
    translate([0,-Len,0])
    rotate([0,0,Guide_ZRot])
    union()
    {
        difference()
        {
            cylinder(d=OD,h=14.74,$fn=OD_Res);
            translate([0,0,-1])
            cylinder(d=OD35,h=8,$fn=Fil1_OD_Res);
            translate([0,-5.5,-.01])
            cylinder(d1=OD43,d2=OD23,h=1.01,$fn=Fil1_OD_Res);
            translate([0,-5.5,0])
            cylinder(d=OD23,h=7,$fn=Fil1_OD_Res);
        }
        translate([0,0,14.74])
        cylinder(d1=20,d2=19.48,h=2.49,$fn=OD_Res);
        translate([0,0,17.23])
        cylinder(d1=19.48,d2=13.02,h=13.02,$fn=OD_Res);
        translate([0,0,30.25])
        cylinder(d1=13.02,d2=11.27,h=5.01,$fn=OD_Res);         //3 transitions up
        translate([0,0,35.26])
        cylinder(d1=11.27,d2=10.42,h=3.36,$fn=OD_Res);         //1st 2 transitions up
        translate([0,0,38.62])
        cylinder(d1=10.42,d2=9.87,h=3.38,$fn=OD_Res);         //2nd 2 transitions up
        color("cyan")
        translate([0,0,42])
        cylinder(d1=9.87,d2=9.6,h=3.39,$fn=OD_Res);         //3rd 2 transitions up
        translate([0,0,42])
        cylinder(d1=9.87,d2=9.6,h=3.39,$fn=OD_Res);

        translate([0,0,45.39])
        cylinder(d=9.6,h=TR_Top,$fn=OD_Res);
        hull()
        {
            translate([0,0,45.39+TR_Top])
            cylinder(d=9.6,h=.1,$fn=OD_Res);
            translate([0,0,Ht-7.5])
            scale([1,.3,1])
            cylinder(d=29.61,h=.1,$fn=OD_Res);
        }
    }
}
//Add all the Parts together
module DrawUnion()
{
    union()
    {
        Arm();                  //Horizontal Arm
        Stem();                 //Add the Vertical Stem
        GuideTubeRotate();      //Add the Guide Tube to top of Stem
        ColumnTransition();     //Add the transition between the Arm & Stem
    }
}
module DrawFinal()
{
    difference()
    {
        DrawUnion();
        translate([Guide_X_Offset,-Len,Ht])
        rotate([0,0,Guide_ZRot])     //Rotate Top of Guide Tube cutting holes
        translate([0,Len,-Ht])      //Translate back to origin before rotating
        CutTopGuideTube();          //Cut all the openings in Guide Tube
    }
}
DrawFinal();
```


[User]
Hey, I'm looking to get a parametric hinge designed in OpenSCAD. I've got a basic idea, but I'd like the design to be flexible enough that I can easily adjust it for different projects.

Basically, I need a hinge with a cylindrical barrel, split into sections, that interlock with two side pieces and a pin that goes through the center. I've got a few specific parameters in mind that I'd like to control.

Here are the key parameters:

*   **Barrel Diameter:** The outer diameter of the hinge barrel.
*   **Spacing:** The minimum space between all the moving parts for easy printing and movement.
*   **Length:** The overall length of the hinge.
*   **Section Count:** The number of interlocking barrel sections that make up the overall barrel length.
*   **Pin Cap Thickness:** How thick the caps on the end of the pin are.
*   **Side Length:** The length of the two flat side pieces connected to the barrel.

I'd also like the design to be able to generate individual parts, like just the pin, just one side piece, or just the barrel sections without the pin. So a parameter or variable to select the parts to output would be really helpful.

Ideally, I'd want to be able to specify the following part options: "pin" (pin only), "side1" (side 1 only), "side2" (side 2 only), "both" (both sides without pin), "cap" (just the pin caps), and "all" (all parts).

It'd be nice if the design could handle the calculation for the section lengths automatically, given the overall length, spacing, pin cap thickness, and section count. I think the section length should be the same for all sections.

For the rendering, it'd be great if you could use the `hull()` function on the cylinder for each section in the barrel to generate the outer profile. Also, be sure to include all the cutouts to make the parts fit together.

I don't have any libraries I need used, so plain OpenSCAD code should be fine.

[Assistant]
hinge.scad:
```
// Hinge

// Which parts to print?
part = "all"; // [pin:Pin Only, side1:Side 1 only, side2: Side 2 only, both: Both sides no pin, cap: Hinge pin cap, all: All parts]

// Outer diameter of the hinge barrel.
barrel_diameter = 5;

// The closest any parts are allowed to come to each other.
spacing = 0.5;

// The length of the hinge.
length = 40;

// How many sections?
section_count = 4;

// How thick is the cap at each end of the pin.
pin_cap_thickness = 2;

side_length = 20;

hinge(barrel_diameter, spacing, length, section_count,
      pin_cap_thickness, 200, side_length, part);

// Function to calculate the needed section length to give a particular overall length
function hinge_section_from_overall(overall, section_count, spacing, pin_cap_thickness) =
    (overall - pin_cap_thickness * 2 - spacing * (section_count + 1))/section_count;

function hinge_side_offset(side, side_length) = (side == 1) ? 0 : -side_length;
function hinge_cutout_offset(side, side_length) =
    (side == 1) ? 0 : side_length;

module hinge_pin_cap (pin_cap_thickness, barrel_diameter, pin_diameter, pin_length, facets) {
  difference() {
    translate([0,0,pin_length-spacing]) {
      cylinder(d=barrel_diameter, h=pin_cap_thickness, $fn=facets);
    }
    hinge_pin (pin_cap_thickness, barrel_diameter, pin_diameter, pin_length, facets);
  }
}

module hinge_pin (pin_cap_thickness, barrel_diameter, pin_diameter, pin_length, facets) {
  union() {
    translate([0,0,-pin_cap_thickness-spacing]) {
      cylinder(d=barrel_diameter, h=pin_cap_thickness, $fn=facets);
    }
    translate([0,0,-spacing]) {
      cylinder(d=pin_diameter, h=pin_length + spacing, $fn=facets);
    }
  }
}

module hinge_side(barrel_diameter, side_thickness, side_length, full_offset, length, section_offset, side, facets) {
  difference() {
    translate([hinge_side_offset(side, side_length),
               barrel_diameter/2 - side_thickness,
               -full_offset]) {
      difference() {
        cube([side_length, side_thickness, length]);
        // Cutouts
        // Bottom
        translate([hinge_cutout_offset(side, side_length),
                   -side_thickness/2,
                   0]) {
          cylinder(d=barrel_diameter+spacing*2, h = full_offset, $fn=facets);
        }
        // Top
        translate([hinge_cutout_offset(side, side_length),
                   -side_thickness/2,
                   length - full_offset]) {
          cylinder(d=barrel_diameter+spacing*2, h = full_offset, $fn=facets);
        }
        // Sections
        for (i = [side:2:section_count-1]) {
          translate([hinge_cutout_offset(side, side_length),
                     -(barrel_diameter/2 - side_thickness),
                     i*section_offset + pin_cap_thickness]) {
            cylinder(d=barrel_diameter+spacing*2, h = section_offset, $fn=facets);
          }
        }
      }
    }
    // Match to barrel
    translate([0,0,-full_offset]) {
      cylinder(d=barrel_diameter, h=length, $fn=facets);
    }
  }
}

function should_render_section(section, part) =
    section % 2 == 1 ? part == "all" || part == "both" || part == "side1" :
                       part == "all" || part == "both" || part == "side2";

module hinge(barrel_diameter, spacing, length, section_count,
             pin_cap_thickness, facets, side_length, part) {
pin_diameter = barrel_diameter/2 - spacing;
section_length = hinge_section_from_overall(length, section_count, spacing, pin_cap_thickness);
section_offset = section_length + spacing;
side_thickness = (barrel_diameter - pin_diameter - spacing*2)/2;
// Shift needed to put the thing back on the origin.
full_offset = spacing+pin_cap_thickness;
pin_length = section_offset*section_count + spacing;

translate([0,0,full_offset]) {
  union() {
    // Sections of the barrel.
    for (i = [0: section_count-1]) {
      if (should_render_section(i, part)) {
        translate([0,0,i*section_offset]) {
          difference() {
            hull()
            {
              cylinder(d=barrel_diameter, h=section_length, $fn=facets);
              if (i%2 == 0) {
                translate([barrel_diameter,barrel_diameter/2-side_thickness+0.01,0]) {
                  cube([1,0.01,section_length]);
                }
              } else {
                translate([-barrel_diameter,barrel_diameter/2-side_thickness+0.01,0]) {
                  cube([1,0.01,section_length]);
                }
              }
            }
            translate([0,0,-spacing]) {
              cylinder(d=pin_diameter+spacing*2, h=section_length+spacing*2, $fn=facets);
            }
          }
        }
      }
    }

    // Side 1
    if (part == "all" || part == "both" || part == "side1") {
      hinge_side(barrel_diameter, side_thickness, side_length, full_offset, length,
          section_offset, 0, facets);
    }
    // Side 2
    if (part == "all" || part == "both" || part == "side2") {
      hinge_side(barrel_diameter, side_thickness, side_length, full_offset, length,
          section_offset, 1, facets);
    }

    // The pin.
    // TODO The pin should print with one cap separated when printed by itself.
    if (part == "all" || part == "pin" || part=="cap") {
      if (part != "cap") {
        hinge_pin (pin_cap_thickness, barrel_diameter, pin_diameter, pin_length, facets);
      }
      if (part != "pin") {
        hinge_pin_cap (pin_cap_thickness, barrel_diameter, pin_diameter, pin_length, facets);
      }
    }
  }
}
}

```


[User]
Hey, I'm looking to create a plaque with a lot of swirling, calligraphic-style lines on it. I've got a basic idea of what I want, but I need some help setting it up parametrically in OpenSCAD. I want to be able to control the size of the plaque, the thickness, and the style of the swirls, including things like the slant, their thickness, and how they curve. Also it would be really cool if the swirls where in two distinct colors!

Here's the basic concept:

1.  **Plaque Base:** I want a rectangular plaque with adjustable dimensions (length and width) and thickness. It should have a slightly inset border for visual appeal. The border should be a chamfered offset. There should also be a second, slightly higher offset which forms the very edge of the design, creating a subtle layered effect.
2.  **Swirls:** I want to generate two sets of swirling lines, kind of like a calligraphic flourish, but generated algorithmically. These swirls should start from different positions on the plaque and be able to be moved around.
3.  **Calligraphic Style:** The lines themselves should resemble a calligraphic stroke, with a variable thickness at any given point along the stroke. I'd like to control both the slant of the strokes and the overall shape of the curves.
4.  **Coloration:** The two sets of swirls should be in distinct colors (gold and dark gold would be great), providing some visual contrast.
5.  **Randomization:** I'd like the ability to either have these swirls randomize each time I generate the file, or be generated from a specific seed. This is critical!

Here's a breakdown of the parameters I'd like to control:

*   **Plaque Dimensions:**
    *   `plate_width`: Width of the plaque.
    *   `plate_height`: Height of the plaque.
    *   `thickness`: Thickness of the plaque.
    *   `border_inset`: The amount of the inset on the base plaque
*   **Swirl Parameters:**
    *   `swirl_start1`: Position of the starting point of swirl set 1. (x,y,z)
    *   `swirl_start2`: Position of the starting point of swirl set 2. (x,y,z)
    *    `swirl_direction_angle1`: The starting angle of the first set of swirls
    *   `swirl_direction_angle2`: The starting angle of the second set of swirls
    *   `swirl_magnitude`: Overall size and direction of the swirl's motion
    *  `swirl_force_magnitude`: A factor on the magnitude of a perpendicular "magnetic" force, which curves the stroke.
    *   `swirl_blend_magnitude`: A factor controlling the mix between previous direction and the magnetic force.
    *   `swirl_length`: A number of loops to make before ending
    *   `swirl_fork_factor`: Frequency of fork branching on each swirl.
    *  `swirl_thickness_factor`: The scale factor of the calligraphic stroke.
    *   `swirl_slant`: The angle of the calligraphic stroke
    *  `swirl_line_count1`: How many initial strokes of set one to draw.
    *  `swirl_line_count2`: How many initial strokes of set two to draw.
    *   `swirl_line_spacing`: Spacing between swirls in set
    *   `seed`: A seed to drive random values in the generation of the swirls and colors. Set to zero for a truly random seed.
*   **Color Parameters:**
    *   `gold_color1`: The primary color used for swirls.
    *  `gold_color2`: The secondary color used for swirls.

I'm not particularly married to how to generate the strokes, but they need to be thick enough to be visible, and the ability to adjust the calligraphic slant is important. I'd prefer the swirl to be created by a recursive function as I'm not sure how else to do it.

I think that should be it, let me know what you think!

[Assistant]
PlaqueX2.scad:
```
// preview[view:south, tilt:top]
Seed=2388385;//
Unseeded=1;//[1,0]
Update=1;//[0:1]
strokewidth=1;
/*[Hidden]*/
RSeed=round(rands(0,999999,1)[0]);
if(Unseeded==0)translate([0,-70,10])color("Black")text(str(RSeed), halign ="center");
Calligraphic=rnd(1.5,3,32487334);//
CalligraphicSlant=rnd(0,90,3248763);//
Oscale=[1,1];//
plate=[185,125];//
thickness=3;
fudge=-0.05;//

v2=rnd(2,4,3248736);
v3=rnd(0.8,1.2,324873);
v4=rnd(1,1.8,32554487);
v5=rnd(0.9,1.1,3244448);
v6=rnd(0.95,1,323334);
v7=rnd(0,360,32346877);
v8=rnd(0,360,363453218);
v9=rnd(0.2,1,3635985);
v10=rnd(0.2,1,3494885);
v11=rnd(0.6,26,3345985);
v12=rnd(0.5,1.5,4594885);
p1=[rnd(-10,01,36345948),rnd(-10,01,33459485),0];
p2=[rnd(-10,01,4598585),rnd(-10,01,63594885),0];
dir=([sin(v7),cos(v7),0])*8*v6;
lim=round(rnd(15,30,2307413585));
fork=5;
golds=["DarkGoldenrod","Goldenrod"];
*difference(){
color("DarkGoldenrod")translate([0,plate[1]*fudge,-thickness]) linear_extrude(height = thickness +1,  convexity = 10, scale=0.97,$fn=20)offset(r=3, chamfer=true)offset(r=-3, chamfer=false) square(plate,center=true);
color("Goldenrod")mirror([0,0,1])translate([0,plate[1]*fudge,-1.99]) linear_extrude(height = 2,  convexity = 10, scale=0.97,$fn=20)offset(delta=3, chamfer=true)offset(r=-5, chamfer=false) square(plate,center=true);
}

up=[0,0,-2];
intersection(){
*color("DarkGoldenrod")translate([0,plate[1]*fudge,-thickness]) linear_extrude(height = thickness +1,  convexity = 10, scale=0.97,$fn=20)offset(r=3, chamfer=true)offset(r=-3, chamfer=false) square(plate,center=true);
scale([Oscale[0],Oscale[1],1]){
// first run
 for(t=[rnd(-40,-10,421):90*v9:rnd(10,60,432)]){
translate([0,0,-rnd(0.2,0.0,123+t)])color(golds[round(rnd(1,0,498475-t))])translate(p1) spiral([-1,0,0],dir,t);
translate([0,0,-rnd(0.2,0.0,123+t)])color(golds[round(rnd(1,0,239847-t))])mirror([1,0,0])translate(p1)spiral([-1,0,0],dir,t);
}
//second run
dir2=([sin(v8),cos(v8),0])*8*v6;
 { for(t=[rnd(-40,-10,Seed):90*v10:rnd(10,60,556)]){
translate([0,0,-rnd(0.1,0.0,123+t)])color(golds[round(rnd(1,0,t))])translate(p2)spiral([-1,0,0],dir2,t,CalligraphicSlant);
translate([0,0,-rnd(0.1,0.0,123+t)])color(golds[round(rnd(1,0,t))])mirror([1,0,0])translate(p2)spiral([-1,0,0],dir2,t,CalligraphicSlant);
}}

}}
// modules
module spiral(op,dir,t,cs, i=0){
magfield=[0,0,cos(i*v11 +t*v12 )*v2];
ndir=dir*0.85*v3+cross(dir,magfield)*0.1*v4;// blend dirction with force ( nonscientific)
np=op+ndir;
line(op,np,cs);
if(i<lim){spiral(np,ndir,t,cs,i+1);
if(i<lim*0.6)if(i%(lim/fork)==2){spiral(np,[-ndir[1],ndir[0],ndir[2]],-t+45,cs+45,i+1);}
}

}

module line(p1, p2,cs=CalligraphicSlant) {
  hull() {
    translate(p1) rotate([-5,5,-cs]) scale([strokewidth/Calligraphic,Calligraphic*strokewidth,1])sphere(1,$fn=6);
    translate(p2) rotate([-5,5,-cs])scale([strokewidth/Calligraphic,Calligraphic*strokewidth,1])sphere(1,$fn=6);
  }
}
function rnd(a = 0, b = 1,S=1) =Unseeded==0? (rands(min(a, b), max(a, b), 1,RSeed+S)[0]): (rands(min(a, b), max(a, b), 1,Seed+S)[0]);

```


[User]
I'd like a design for a UMD (Universal Media Disc) shaped holder for Memory Stick Duos, primarily for use with PSP 2000 and 3000 models. I saw a design that was made a few years ago but I want to make my own.

Here's what I have in mind:

**Shape:** The base of the holder should mimic the outer shape of a UMD disc, following the ECMA-365 standard as closely as possible.

**Card Slots:** I need two versions, like the original design. The first version will have a single card slot for one Memory Stick Duo, and this should be designed to be easy to print, possibly with the slot slightly offset. The second version should have two card slots for two Memory Stick Duos, but I'm okay if it needs supports for printing. Both card slots need to hold the MS Duo securely.

**Key Features and Dimensions:**

*   **Base:**  The overall UMD shape should include the large main circle, the smaller circular cutout on one side, and the flat area on one edge of that.
*   **Ref Holes:** There should be those two small "reference" holes, as the UMD has.
*   **Spindle Hole:** The center spindle hole should also be present, and needs to accurately fit the diameter.
*   **Head Hole:** I want the rectangular "head hole" shape to be present, as on the real disc.
*   **Latch Hole:** The UMD's latch hole should also be included.
*   **Card Slot:** The card slot should be long enough to hold the MS Duo, and should be a snug fit but not so tight that it damages anything. The card slot should be accessible from the edge of the UMD shape.

**Important Considerations:**

*   **Tolerance:** I know I'll need to adjust tolerances for printing, so the design should have a variable called `tolerance`. Something around -0.15mm seems like a good starting point but I'd like to be able to adjust it.
*   **Parametric Design:**  All dimensions must be configurable as variables, so I can easily adjust things like the radius of the outer circle, the width of the card slot, etc.
*   **Printability:** One card slot version should be optimized for printability (no supports or minimal supports).
*   **Material:** This will probably be printed in PLA, HIPS, or SBS.
*   **Nozzle and Layer Height:** Layer height will be around 0.2mm, and I will be using a 0.3 - 0.6mm nozzle for printing.
*   I want all the dimensions I use to be declared in the top section of the file as variables, this makes it easier to find them when I'm editing.

Could you please generate the OpenSCAD files for this design? I'm not looking for any external libraries for this.

[Assistant]
UMD.scad:
```
/**
*
* UMD Memory Stick Duo keeper.
*
* Copyright (C) 2016 thelongrunsmoke.
*
* Licensed under the Apache License, Version 2.0 (the "License")
*
* See ECMA-365 for dimensions details.
*
*/

//this depend from printer, nozzle and using material. If you do not now yours, -0.15 is good place for start.
tolerance = -0.15; //[-0.3:0.05:0.3]

/* [Hidden] */
$fn = 128;

R1 = 32;
R2 = 70;
R3 = 5;
R8 = 1.8;

L1 = 65;
L3 = 64;
L6 = 20.5;
L7 = 26.3;
L9 = 4.2;
L10 = 3.6;
L11 = 41;
L12 = 3.6;
L13 = 4.6;
L16 = 35.8;
L17 = 9.8;
L18 = 17.4;
L19 = 2.2;

D2 = 3.6;
D5 = 18;

cor = 4.18;

// Two card variant.
*difference(){
    baseShape();
    translate([-19,0,0])
      simpleCardSlot();
    translate([16.5,0,0])
      simpleCardSlot();
}

// More printable one card variant.
difference(){
    baseShape();
    translate([-20.3,0,0])
      cardSlot();
}

// UMD disc shape, based on ECMA-365 standart.
module baseShape(){
    difference(){
        linear_extrude(L9)
          outline();
        refHoles();
        spindelHole();
        headHole();
        latchHole();
    }
}

module outline(){
    offset(R3+tolerance){
        circle(r=R1-R3, center=true);
        difference(){
            translate([R1+R2-L1,0,0])
              circle(r=R2-R3, center=true);
            translate([R2-L7,0,0])
              square((R2-cor)*2, center=true);
        }
        translate([-(L7-4.2)/2,0,0])
          square([L7-cor, L3-(R3*2)], center=true);
    }
}

module refHoles(){
    translate([0,0,L9-0.2])
      linear_extrude(0.3)
        offset(0.2-tolerance)
          refHolesOutline();
    translate([0,0,L9-L10])
      linear_extrude(L10)
        offset(-tolerance)
          refHolesOutline();
}

module refHolesOutline(){
    translate([-L7,L6,0])
      circle(d=D2, center=true);
    translate([-L7,-(L11-L6),0])
      hull(){
          translate([0,(L13-R8*2)/2,0])
            circle(r=R8, center=true);
          translate([0,-(L13-R8*2)/2,0])
            circle(r=R8, center=true);
      }
}

module spindelHole(){
    translate([0,0,L9-0.2])
      linear_extrude(0.3)
        offset(-tolerance)
          circle(d=D5+0.2*2, center=true);
    translate([0,0,L9-L19])
      linear_extrude(L19)
        offset(-tolerance)
          circle(d=D5, center=true);
}

module headHole(){
    translate([0,L6-L17+30/2,L9-L19])
      linear_extrude(L19)
        offset(-tolerance)
          square([L16-L18, 30], center=true);
    translate([0,L6-L17+30/2,L9-0.2])
      linear_extrude(0.3)
        offset(-tolerance)
          square([L16-L18+0.6, 30], center=true);
}

module latchHole(){
    translate([0,0,L9-0.2])
      linear_extrude(0.3)
        offset(0.2)
          latchHoleOutline();
    translate([0,0,-0.1])
      linear_extrude(L9)
          latchHoleOutline();
}

module latchHoleOutline(){
    translate([0,-17,0])
      offset(-tolerance)
        hull(){
            translate([2.5,0,0])
              circle(r=2.5, center=true);
            translate([-2.5,0,0])
              circle(r=2.5, center=true);
        }
}

// Card slots.
module cardSlot(){
    translate([0,0,L9-2.2])
      union(){
          difference(){
              linear_extrude(2.2+0.1)
                offset(-tolerance)
                  square([20, 31], center=true);
              translate([110,0,2.2-0.4])
                linear_extrude(0.6)
                  offset(-tolerance)
                    circle(r=100, center=true);
              translate([-110,0,2.2-0.4])
                linear_extrude(0.6)
                  offset(-tolerance)
                    circle(r=100, center=true);
          }
          translate([0,0,-5/2])
            linear_extrude(5)
              offset(-tolerance)
                hull(){
                    translate([0,5,0])
                      circle(r=6, center=true);
                    translate([0,-5,0])
                      circle(r=6, center=true);
                }
      }
}

module simpleCardSlot(){
    translate([0,0,-0.1])
      linear_extrude(1.8+0.1)
        offset(-tolerance)
          square([20, 31], center=true);
    linear_extrude(5)
      offset(-tolerance)
        hull(){
            translate([0,5,0])
              circle(r=6, center=true);
            translate([0,-5,0])
              circle(r=6, center=true);
        }
     translate([0,0,L9-0.2])
    linear_extrude(0.3)
      offset(0.2+-tolerance)
        hull(){
            translate([0,5,0])
              circle(r=6, center=true);
            translate([0,-5,0])
              circle(r=6, center=true);
        }
}
```


[User]
I'd like you to help me design a parametric OpenSCAD file for creating business cards. The design should allow for customization of the text content, font styles, font sizes, spacing, and positioning of each line of text.

Here's a breakdown of what I'm looking for:

**Basic Structure:**

*   The business card should be a rectangular shape with customizable dimensions. I'd like to be able to adjust the width and length.
*   There should be an option to include a thin, horizontal line below the company name. The user should be able to specify the length of this line or choose not to include it.
*   The card should have four lines of text.
    *   Line 1: Company name (e.g., "COMPANY").
    *   Line 2: Name of the individual (e.g., "Your Name").
    *   Line 3: Contact phone number (e.g., "+1-234-567-1234").
    *   Line 4: Email address (e.g., "3dcards@thecapital.nl").

**Customization Options:**

*   **Text Content:** The user should be able to input their own text for each of the four lines.
*   **Font Styles:** For each line, provide a selection of font styles from the following options: "Allerta Stencil", "Sirin Stencil", "Stardos Stencil", "Liberation Mono", "Liberation Sans", and "Liberation Serif". The "Liberation" fonts are not stencil fonts, but should still be an option.
*   **Font Sizes:** Allow the user to adjust the font size for each line individually, within a reasonable range (e.g., 3 to 24).
*   **Spacing:** The user should be able to fine-tune the letter spacing for each line.
*   **Positioning:**  Each line's vertical position should be adjustable with an offset parameter.

**Text Effects:**

*   The company name (Line 1) and the individual's name (Line 2) should be "cut out" or debossed into the card.
*   The phone number (Line 3) should be embossed (raised) from the surface of the card.
*   The email address (Line 4) should be debossed but in a bold font style.

**Additional Details:**

*   The thickness of the card should be a customizable parameter.
*   The code should use the following external font files: "AllertaStencil-Regular.ttf", "SirinStencil-Regular.ttf", and "StardosStencil-Bold.ttf".
*   $fn should be set to 120 for a smooth appearance.
*   You may use the following libraries: None.

I'm looking for a well-structured and commented OpenSCAD file that makes it easy to create custom business cards. Please also provide any necessary instructions or explanations on how to use the generated code.

[Assistant]
BusinessCardMaker2.0.scad:
```
// Version 2.0 of the Business Card Maker
// http://www.thingiverse.com/thing:1728443

// Changelog
// 2.0
// Remixed http://www.thingiverse.com/thing:1713563 (version 1)
// Now having text embossed and debossed

// All text is optional. You can change the order of the lines in the "Extras-and-spacing" submenu
/* [Basic details] */

name = "COMPANY"; // Company name
thin_line = 60; // [60:Line, 80:Wide line,0:No line]
line2 = "Your Name"; // Open letters
line3 = "+1-234-567-1234"; // Embossed text
line4 = "3dcards@thecapital.nl"; // Debossed bold text

/* [Fonts] */
// Bigger is better. Minimum recommended size is 6 for any detail.
Font_line_1 = "Allerta Stencil"; // ["Allerta Stencil":Alerta,"Sirin Stencil":Sirin, "Stardos Stencil":Stardos]
Fontsize_line_1 = 10; // [6:0.1:24]

// For the font detail of Sirin Stencil choose a font size > 10. You might be able to compensate with spacing in de extra's tab
Font_line_2 = "Stardos Stencil"; // ["Allerta Stencil":Alerta,"Sirin Stencil":Sirin, "Stardos Stencil":Stardos]
Fontsize_line_2 = 9 ; // [6:0.1:24]

Font_line_3 = "Liberation Mono";// ["Allerta Stencil":Alerta,"Sirin Stencil":Sirin, "Stardos Stencil":Stardos,"Liberation Mono":Mono, "Liberation Sans":Sans, "Liberation Serif":Serif]
// You can try a really small font like 4 but the letters will not be open. Good thing about that is that 'islands' will not fall out.
Fontsize_line_3 = 5; // [3:0.1:24]

Font_line_4 = "Liberation Sans";// ["Allerta Stencil":Alerta,"Sirin Stencil":Sirin, "Stardos Stencil":Stardos,"Liberation Mono":Mono, "Liberation Sans":Sans, "Liberation Serif":Serif]
Fontsize_line_4 = 5; // [3:0.1:24]

/* [Extras and Spacing] */
// You can use spacing
Spacing_line_1 = 0.92; // [0.5:0.01:2.0]
offset_line_1 = 14; // [0:0.5:24]
Spacing_line_2 = 1; // [0.5:0.01:2.0]
offset_line_2 = -2; // [-24:0.5:24]
Spacing_line_3 = 1.2; // [0.5:0.01:2.0]
offset_line_3 = -14.5; // [-24:0.5:0]
Spacing_line_4 = 1; // [0.5:0.01:2.0]
offset_line_4 = -22.5; // [-24:0.5:0]

Plastic_thickness = 0.52;

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

use <AllertaStencil-Regular.ttf>
use <SirinStencil-Regular.ttf>
use <StardosStencil-Bold.ttf>
$fn=120;

difference(){
    union(){
        linear_extrude(height=Plastic_thickness){
          difference(){
            offset(4){square([76,46], center = true);};
            translate([0,offset_line_1,0]){
            text(name, size=Fontsize_line_1, halign="center", font=Font_line_1, spacing=Spacing_line_1);
            }
            if (thin_line){
                translate([0,10]){
                    square([thin_line,1], center=true);
                }
            }
            translate([0,offset_line_2,0]){
            text(line2, size=Fontsize_line_2, halign="center", font=Font_line_2, spacing=Spacing_line_2);
            }
          }
        };
        color("DarkBlue"){
        linear_extrude(height=Plastic_thickness+0.2){
        translate([0,offset_line_3,0]){
            text(line3, size=Fontsize_line_3, halign="center", font=Font_line_3, spacing=Spacing_line_3);
        }}}
    }
        translate([0,offset_line_4,Plastic_thickness-0.2]){
            linear_extrude(height=Plastic_thickness){
                text(line4, size=Fontsize_line_4, halign="center", font=str(Font_line_4,":style=Bold"), spacing=Spacing_line_4);
    }
}

}

;
```
BusinessCardMaker1.1.scad:
```
// Version 1.1 of the Business Card Makeer
// Changelog
// - fixed fonts. Style doesn't work
// - Smaller steps in spaing
// - steps in offset
/* [Basic details] */
name = "3D Print co."; // Companyname
thin_line = 60; // [60:Line, 80:Wide line,0:No line]
line2 = "Your Name";
line3 = "design@thecapital.nl";

/* [Fonts] */
// Bigger is better. Minimum recommended size is 6 for any detail.
Font_line_1 = "Stardos Stencil"; // ["Allerta Stencil":Alerta,"Sirin Stencil":Sirin, "Stardos Stencil":Stardos]
Fontsize_line_1 = 8.2; // [6:0.2:24]

// For the font detail of Sirin Stencil choose a font size > 10. You might be able to compensate with spacing under > extras-and-spacing
Font_line_2 = "Sirin Stencil"; // ["Allerta Stencil":Alerta,"Sirin Stencil":Sirin, "Stardos Stencil":Stardos]
Fontsize_line_2 = 10.2 ; // [6:0.2:24]

Font_line_3 = "Standard";// ["Standard":Standard, "Allerta Stencil":Alerta,"Sirin Stencil":Sirin, "Stardos Stencil":Stardos]
// You can try a really small font like 4 but the letters will not be open. Good thing about that is that 'islands' will not fall out.
Fontsize_line_3 = 4.2; // [4:0.2:24]

/* [Extras and Spacing] */
// You can use spacine
Spacing_line_1 = 1.1; // [0.5:0.01:2.0]
offset_line_1 = 15; // [0:0.5:24]
Spacing_line_2 = 1.06; // [0.5:0.01:2.0]
offset_line_2 = -2; // [-24:0.5:24]
Spacing_line_3 = 1.22; // [0.5:0.01:2.0]
offset_line_3 = -20; // [-24:0.5:0]

Plastic_thickness = 0.42;

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

use <AllertaStencil-Regular.ttf>
use <SirinStencil-Regular.ttf>
use <StardosStencil-Bold.ttf>
$fn=60;

linear_extrude(height=Plastic_thickness){
difference(){
    offset(2){square([81,51], center = true);};
    translate([0,offset_line_1,0]){
    text(name, size=Fontsize_line_1, halign="center", font=Font_line_1, spacing=Spacing_line_1);
    }
    if (thin_line){
        translate([0,10]){
            square([thin_line,1], center=true);
        }
    }
    translate([0,offset_line_2,0]){
    text(line2, size=Fontsize_line_2, halign="center", font=Font_line_2, spacing=Spacing_line_2);
    }
    translate([0,offset_line_3,0]){
    text(line3, size=Fontsize_line_3, halign="center", font=Font_line_3, spacing=Spacing_line_3);

}}}
;
```
BusinessCardMaker.scad:
```
/* [Basic details] */
name = "3D Print co."; // Companyname
thin_line = 60; // [60:Line, 80:Wide line,0:No line]
line2 = "Your Name";
line3 = "design@thecapital.nl";

/* [Fonts] */
// Bigger is better. Minimum recommended size is 6 for any detail.
Font_line_1 = "Stardos Stencil:style=Bold"; // ["Allerta Stencil":Alerta,"Sirin Stencil":Sirin, "Stardos Stencil:style=Bold":Stardos]
Fontsize_line_1 = 8.2; // [6:0.2:24]

// For the font detail of Sirin Stencil choose a font size > 10. You might be able to compensate with spacing under > extras-and-spacing
Font_line_2 = "Sirin Stencil"; // ["Allerta Stencil":Alerta,"Sirin Stencil":Sirin, "Stardos Stencil:style=Bold":Stardos]
Fontsize_line_2 = 10.2 ; // [6:0.2:24]

Font_line_3 = ":style:bold";// ["Standard", ":style:bold":Standard Bold, "Allerta Stencil":Alerta,"Sirin Stencil":Sirin, "Stardos Stencil:style=Bold":Stardos]
// You can try a really small font like 4 but the letters will not be open. Good thing about that is that 'islands' will not fall out.
Fontsize_line_3 = 4.2; // [4:0.2:24]

/* [Extras and Spacing] */
// You can use spacine
Spacing_line_1 = 1.1; // [0.5:0.1:2.0]
offset_line_1 = 15; // [0:24]
Spacing_line_2 = 1.06; // [0.5:0.1:2.0]
offset_line_2 = -2; // [-24:24]
Spacing_line_3 = 1.12; // [0.5:0.1:2.0]
offset_line_3 = -20; // [-24:0]

Plastic_thickness = 0.42;

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

use <AllertaStencil-Regular.ttf>
use <SirinStencil-Regular.ttf>
use <StardosStencil-Bold.ttf>
$fn=120;

linear_extrude(height=Plastic_thickness){
difference(){
    offset(2){square([81,51], center = true);};
    translate([0,offset_line_1,0]){
    text(name, size=Fontsize_line_1, halign="center", font=Font_line_1, spacing=Spacing_line_1);
    }
    if (thin_line){
        translate([0,10]){
            square([thin_line,1], center=true);
        }
    }
    translate([0,offset_line_2,0]){
    text(line2, size=Fontsize_line_2, halign="center", font=Font_line_2, spacing=Spacing_line_2);
    }
    translate([0,offset_line_3,0]){
    text(line3, size=Fontsize_line_3, halign="center", font=Font_line_3, spacing=Spacing_line_3);

}}}
;
```


[User]
Hey, I'm looking to get an OpenSCAD file (or files if that makes more sense) for a slotted disc, like the kind you'd use for an optical encoder or speed sensor. I'm not very good at OpenSCAD myself so I'd really appreciate the help.

Here's what I need:

**Core Disc:**
*   I need to be able to set the overall radius of the main disc, and also its thickness.  I should also be able to set the size of the center hole. It should all be a cylinder.

**Slots:**
*   The slots need to be rectangular in shape and I want to control the width and the height of each slot, and how far they are offset from the edge of the disk.
*   I need to be able to specify how many slots to put around the disc - either by setting an angle to increment by or specifying the number of slots directly.

**Parametric Controls**
*  I'd like to be able to control all of the dimensions and number of slots through variables at the top of the file.

I think I have everything there. Let me know if you have any questions. I'm not picky about library use or anything like that. Whatever makes the code simplest.

[Assistant]
slotted_disc.scad:
```
/* [Main disc] */

//How big is the main disc.  All values in mm
disc_radius = 30;
//How thick is the main disc.
disc_thickness = 3;
//How big is the center hole?
hole_radius = 5;

/* [Slots] */
//How big is your slot?
slot_height = 6;
//How wide is your slot?
slot_width = 3;
//How far from the edge of the disk do you want the slot?
slot_offset = 1;

//How much rotation before I draw the next slot.  You'll get the best results if this is a clean divisor of 360.
rotate_by = 15; //[1:360]

/* [Hidden] */
current_rotation = 0;

rotate_steps = 360 / rotate_by;

difference(){
    cylinder(disc_thickness,disc_radius,disc_radius);
    cylinder(disc_thickness,hole_radius,hole_radius);

    for(i  = [0:1:rotate_steps])
    {
        rotate([0,0,rotate_by*i]){
            slot();
        }
    }
}

module slot(){
    translate([disc_radius - slot_height - slot_offset,-(slot_width/2),0])
        cube([slot_height,slot_width,disc_thickness]);
}
```


[User]
Hey, I'm looking to design a parametric butt hinge for 3D printing, and I've got some specifications in mind. I'm going to want it to be customizable, so ideally, I'd like to be able to set parameters for things like leaf thickness, pin length, overall width when open, pin diameter, number of knuckles, and how many drill holes it has.

I'm imagining something like this:

*   **Leaf Thickness:** I need to specify the thickness of each leaf, and this should be at least the pin diameter plus 3 units.
*   **Pin Length:** The length of the pin itself.
*   **Open Width:** This is the distance from leaf edge to leaf edge when the hinge is laid flat. It needs to be at least the leaf thickness plus 20.
*   **Pin Diameter:** I need to set the diameter of the pin, and it has to be at least 3 units.
*   **Knuckle Count:** This is how many knuckles the hinge has; needs to be an odd number and at least 3.
*   **Drill Hole Count:** The number of screw holes for mounting, these are spaced evenly along the length.

I'd like the OpenSCAD files to handle the math behind these parameters, ensuring that minimum dimensions are respected. The output should consist of the hinge itself, complete with a pin and the screw holes. I do want a printed-in-place design with clearances for the pin and between knuckles. I'd also like some kind of built-in support structure that can easily be removed after printing. The screw holes should also be chamfered to allow for countersunk screws.

Finally, I'm hoping to use the MCAD library, as it seems to have the functionality I need.

[Assistant]
ButtHinge.scad:
```
/* GLOBAL */
// What is the thickness of the leaves? (min=pin diameter+3)
leafGauge = 6;

// What is the length of the pin?
pinLength = 30;

// What is the width of the pin from leaf edge to leaf edge when laid flat? (min=leafGuage+20)
openWidth = 40;

// What is the diameter of the pin? (min=3)
diameter = 3;

// How many knuckles?
knuckleCount = 5; // [3:2:99]

// How many drill holes?
holeCount = 3; // [0:20]

module drillHole( holeRadius, chamferRadius, length )
{
    union () {
        cylinder(r=holeRadius, h=length+2, center=true, $fn=32);
        translate([0,0,length/2-chamferRadius])
            cylinder(r1=0, r2=2*chamferRadius, h=2*chamferRadius, $fn=32);
    }
}

/* HIDDEN */
$fn = 128;

module buttHinge( gauge, length, width, pinDiameter, knuckles, drillHoles )
{
	truePinDiameter = max(pinDiameter,3);
	trueGauge = max(gauge,pinDiameter+3);
	trueWidth = max(width/2,(trueGauge + 20)/2);
	trueKnuckles = max(knuckles, 2*floor(knuckles/2)+1, 3);

	knuckleRadius = trueGauge / 2;
	pinRadius = truePinDiameter / 2;
	pitch = length / trueKnuckles;
	leafWidth = trueWidth;
	pClear = 0.3; // clearance between the pin and the free knuckles
    kClear = 0.4; // clearance between adjacent free and fixed knuckles
	support = 0.3; // support width
    holeSpacingV = length / (2*drillHoles);
    holeRadius = 1.7;
    chamferRadius = 3.4;

	union() {
		// Fixed side
		difference() {
			union() {
				// Knuckle
                translate([0,0,-length/2]) cylinder(r=knuckleRadius,h=length);
				// Leaf
				translate([-leafWidth/2,0,0]) cube([leafWidth,gauge,length],true);
			}

            union() {
				// Space for the free knuckles
				for ( i = [1:2:trueKnuckles-2] )
					translate([-(trueGauge+2*kClear)/2,-(trueGauge+2*kClear)/2,i*pitch - kClear - length/2])
						cube([trueGauge+2*kClear,trueGauge+2*kClear,pitch + 2*kClear]);
                // Drill holes
                for ( i = [1:2:ceil(drillHoles/2)] ) {
                    translate([chamferRadius+1-leafWidth,0,(2*i-1)*holeSpacingV - length/2]) rotate([90,0,0])
                        drillHole(holeRadius, chamferRadius, trueGauge);
                    translate([chamferRadius+1-leafWidth,0,length/2 - (2*i-1)*holeSpacingV]) rotate([90,0,0])
                        drillHole(holeRadius, chamferRadius, trueGauge);
                    if ( i < drillHoles/2 ) {
                        j = i+1;
                        translate([-leafWidth/2,0,(2*j-1)*holeSpacingV-length/2]) rotate([90,0,0])
                            drillHole(holeRadius, chamferRadius, trueGauge);
                        translate([-leafWidth/2,0,length/2-(2*j-1)*holeSpacingV]) rotate([90,0,0])
                            drillHole(holeRadius, chamferRadius, trueGauge);
                    }
                }
			}
		}

		// Pin
		translate([0,0,-length/2]) cylinder(r=pinRadius,h=length);

		// Free side
		rotate(a=30,v=[0,0,1])
		difference() {
			union() {
				// Knuckle
                translate([0,0,-length/2]) cylinder(r=knuckleRadius,h=length);
				// Leaf
				translate([leafWidth/2,0,0]) cube([leafWidth,gauge,length],true);
			}
			union() {
				// Space for the fixed knuckles
				for ( i = [0:2:trueKnuckles-1] )
					translate([-(trueGauge+2*kClear)/2,-(trueGauge+2*kClear)/2,i*pitch - length/2])
						cube([trueGauge+2*kClear,trueGauge+2*kClear,pitch]);

				// Space for the pin
				translate([0,0,-length/2]) cylinder(r=pinRadius+pClear,h=length);

                // Clear the ends that are left behind because of round-off error
                translate([-(trueGauge+2*kClear)/2,-(trueGauge+2*kClear)/2,-(length/2+kClear)])
                   cube([trueGauge+2*kClear,trueGauge+2*kClear,pitch]);
                translate([-(trueGauge+2*kClear)/2,-(trueGauge+2*kClear)/2,length/2-pitch+kClear])
                    cube([trueGauge+2*kClear,trueGauge+2*kClear,pitch]);

                // Drill holes
                for ( i = [1:2:ceil(drillHoles/2)] ) {
                    translate([leafWidth-chamferRadius-1,0,(2*i-1)*holeSpacingV - length/2]) rotate([90,0,0])
                        drillHole(holeRadius, chamferRadius, trueGauge);
                    translate([leafWidth-chamferRadius-1,0,length/2 - (2*i-1)*holeSpacingV]) rotate([90,0,0])
                        drillHole(holeRadius, chamferRadius, trueGauge);
                    if ( i < drillHoles/2 ) {
                        j = i+1;
                        translate([leafWidth/2,0,(2*j-1)*holeSpacingV-length/2]) rotate([90,0,0])
                            drillHole(holeRadius, chamferRadius, trueGauge);
                        translate([leafWidth/2,0,length/2-(2*j-1)*holeSpacingV]) rotate([90,0,0])
                            drillHole(holeRadius, chamferRadius, trueGauge);
                    }
                }
			}
		}

		// Support material
		difference() {
			// Support strips
			intersection() {
				cylinder(h=length,r=knuckleRadius,center=true);
				union() {
					cube([support,2*knuckleRadius,length],center=true);
					cube([2*knuckleRadius,support,length],center=true);
				}
			}

			// Subtract the pin
			cylinder(h=length,r=pinRadius + pClear,center=true);
		}
	}
}

buttHinge( gauge=leafGauge, length=pinLength, width=openWidth, pinDiameter=diameter, knuckles=knuckleCount, drillHoles=holeCount);
```


[User]
Hey, I'm trying to design a universal mount for cylindrical objects, like binoculars or small telescopes, that I can attach to a standard tripod. I have a basic design in mind, and I'd like to have it be parametric so it's easily adaptable to different cylinder diameters.

Essentially, the mount needs to have two curved arms that grip around the cylinder and a flat base with a threaded insert for attaching to a tripod. The cylinder will sit perpendicular to the tripod mount. Here’s a breakdown of the desired design:

*   **Core Gripping Structure**: The core design will be a union of two half-cylinder shapes that clamp the cylindrical object. The 'gripping' areas of these half-cylinders should be slightly inset into the overall mount body, and the cylinder itself should be cradled by these two shapes. This "grip" is the primary design for holding the cylindrical object itself.
*   **Body**: The base body will be a cuboid, with the cylindrical grip in the middle. The width of the cuboid will need to be long enough to fully support the grips.
*  **Tripod Mount**: A hole will need to be added to the center of the cuboid base for a standard 1/4"-20 nut, which would be inserted using an interference fit or press-fit method. This hole will need to have two diameters - the first is for the nut, and the second is a larger diameter for the press-fit or interference part.

Here are the parameters I need:

*   `barrel_diameter`: The diameter of the cylinder to be held by the mount.
*   `depth`: The depth (or length along the barrel) of the mount.
*   `base_width`: The width of the base cuboid that holds the grips. This needs to be calculated from `barrel_diameter` and a fixed offset to ensure it can support the cylinder grips fully.
*   `base_height`: The height of the cuboid base.
*   `mount_thickness`: The thickness of the material used for the mount body.
*   `nut_diameter`: The diameter of the 1/4"-20 nut (approximately 12.4mm).
*   `nut_pressfit_diameter`: The diameter of the interference fit (or press fit) part of the nut hole (maybe 12.5 or 12.6mm).
*   `nut_hole_depth`: the depth of the nut hole in the base.

I would like it to use the BOSL2 library as it seems to make a lot of these tasks easier. I would also like to ensure that the press-fit diameters and nut hole diameters/depth are all parameterized so I can make minor tweaks during my testing and prototyping. Also, I would like the base to not extend beyond the grip, as the original design did. Could you create the necessary OpenSCAD files to achieve this?

[Assistant]
binoc_mount_01.scad:
```
barrel_diameter=33;
depth=30;

rotate([0,90,0]) intersection(){
	cube([depth+1,barrel_diameter+6,barrel_diameter+14],center=true);
	difference(){
		union(){
			rotate([0,90,0]) cylinder(d=barrel_diameter+6,h=depth,center=true,$fa=5);
			rotate([-135,0,0]) translate([0,barrel_diameter/2,barrel_diameter/2]) cube([depth,barrel_diameter,barrel_diameter],center=true);
		}
		union(){
			rotate([0,90,0]) cylinder(d=barrel_diameter,h=depth+1,center=true,$fa=5);
			translate([0,0,barrel_diameter/2]) rotate([0,90,0]) cylinder(d=barrel_diameter,h=depth+1,center=true,$fa=5);
			rotate([135,0,0]) translate([0,0,barrel_diameter+3]) rotate([0,90,0]) cylinder(d=barrel_diameter,h=depth+1,center=true,$fa=5);
			rotate([-135,0,0]) translate([0,0,barrel_diameter+3]) rotate([0,90,0]) cylinder(d=barrel_diameter,h=depth+1,center=true,$fa=5);
			translate([0,0,-barrel_diameter/2-3]) cylinder(h=10, d=6.35, center=true, $fn=32);
			translate([0,0,-barrel_diameter/2-5]) cylinder(h=10, d=12.4, $fa=60);
		}
	}
}
```


[User]
I'm looking to create a parametric enclosure for a power supply, specifically one that can be customized for different output options and power supply sizes. I need two pieces: a front cover and a back cover.

The front cover should have a cutout for a standard IEC320 C14 power inlet with a fuse switch, which should be fixed in size to a common model. It should also have options for different DC output configurations:
    *   A single round opening for a cable (with a customizable diameter)
    *   A single pair of banana jacks
    *   Two pairs of banana jacks

The back cover should be a simple plate with a large central opening to expose the power supply components.

Both covers should have small feet (tabbed cylinders) for stability, and should have parameters to adjust the height, width, and depth. I'd like to have a parameter to control the depth of the power-side cover independently from the blank-side cover, and also have parameters for the length and height of the power inlet section. Also, the central opening on the back cover should be scalable to a percent of the overall size of the cover.

I'm thinking we'll need parameters like:

*   `height`: Overall height of the PSU (with plastic expansion)
*   `width`: Overall width of the PSU (with plastic expansion)
*   `power_side_depth`: Depth of the power-side cover.
*   `blank_side_depth`: Depth of the blank-side cover.
*   `PWR_Block_len`: Length of the power inlet section.
*   `PWR_Block_height`: Height of the power inlet section.
*   `DC_Type`: An integer to select the output type (0 = round opening, 1 = single banana jack, 2 = double banana jack).
*   `DC_power_diameter`: Diameter of the round DC power opening (only if DC_Type = 0).

I don't need to use any external libraries for this I think. The code I had before was all contained within a single file. Could you generate the code for this?

[Assistant]
General_PSU_Cover_v2.scad:
```

/* Open SCAD Name.:
*  Copyright (c)..: 2016 www.DIY3DTech.com
*
*  Creation Date..:
*  Description....: PSU end covers
*
*  Rev 1: Base design: drcharlesbell@gmail.com
*  Rev 2: Modifcations by http://www.DIY3DTech.com
*
*  This program is free software; you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation; either version 2 of the License, or
*  (at your option) any later version.
*
*  This program is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*/

// Parts:
// Inlet Male Power Socket with Fuse Switch 10A 250V 3 Pin IEC320 C14
// http://amzn.to/2aMR5ve
//
// 10pcs Terminal Binding Post Power Amplifier Dual 2-way Banana Plug Jack
// http://amzn.to/2biVSaq

/*------------------Customizer View-------------------*/

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

/*---------------------Parameters---------------------*/

// height of the PSU (add for plastic expansion)
height = 50.9;
// width of the PSU (add for plastic expansion)
width = 111;
// depth for power-side cover (leave room for switch)
power_side_depth = 80;  //[1:1:100]
// depth for blank-side cover
blank_side_depth = 27.2;  //[1:1:100]
// length of power block
PWR_Block_len = 47.7;
// height of power block
PWR_Block_height = 27.6;
// 0 = Round Opening 1 = Single Banna Jack 2 = Double Banna Jack
DC_Type = 2; //[0:Single Hole, 1:One Banna Jack Pair, 2:Two Banna Jack Pair]
// Outlet hole for DC power cord DC_Type = 0
DC_power_diameter = 8.0; //[1:1:10]

/*-----------------------Execute----------------------*/

translate ([0,(height/2)+9,0]) power_side();
translate ([0,-(height/2),0]) blank_side();

/*-----------------------Modules----------------------*/

module power_side() {

    difference() { //first order differance to add power block support

        union() {//start first union
        //create main unit
            difference() {
                union() {//start union second union
                    cube([width+4,height+4,power_side_depth]);

                    //create feet
                    translate([5,(height-1)+5,0]) rotate([0,0,180]) foot();
                    translate([width-1,(height-1)+5,0]) rotate([0,0,180]) foot();

                        } //end second union

            //start subtraction of difference
            translate([2,2,2]) cube([width,height,power_side_depth]);

            // start if tree
                if(DC_Type==0) translate([((((width/2)/2)-(19/2)+11.5))+(width/2),(height/2),-1]) rotate([0,0,0])  cylinder(6,DC_power_diameter/2,DC_power_diameter/2);
                else if(DC_Type==1)   translate([((((width/2)/2)-(19/2)+11.5))+(width/2),(height/2),-1]) rotate([0,0,0]) dual_banna_jack();
                else if(DC_Type==2)    {translate([((((width/2)/2)-(19/2)+11.5))+(width/2),((height/4)+(11.5/2)),-1]) rotate([0,0,0]) dual_banna_jack(); translate([((((width/2)/2)-(19/2)+11.5))+(width/2),(height/2)+(height/4),-1]) rotate([0,0,0]) dual_banna_jack();}
            // end if tree

        } //end second difference
            //create inter-support for power block to keep from moving
            translate([(30-((PWR_Block_len+6)/2)),((PWR_Block_height-6)/2)-4,0]) cube([PWR_Block_len+6,PWR_Block_height+6,17]);

  } //end first union
       // power block cutout from support as well as primary box
        translate([(30-(PWR_Block_len/2)),(PWR_Block_height/2)-4,-1]) cube([PWR_Block_len,PWR_Block_height,22]);

  } //end first difference
}//end module power_side

module blank_side() {
  difference() {

        union() {//start union
            cube([width+4,height+4,blank_side_depth]);
             //create feet
            translate([5,0,0]) rotate([0,0,0]) foot();
            translate([width-1,0,0]) rotate([0,0,0]) foot();
             } //end union

    //start subtraction of difference
    //create center opening
    translate([2,2,2]) cube([width,height,blank_side_depth]);
    //remove extra plastic from cover by making a hole 80% of the opening›
    translate([(((width+4)/2)-((width*0.8)/2)),((height+4)/2)-((height*0.8)/2),-1]) cube([(width*0.8),(height*0.8),blank_side_depth]);

  }//end difference
}//end blank_side module

module foot() {
    //create tabed foot
    difference() {
            union() {//start union
                  translate([0,0,0]) rotate([0,0,0]) cylinder(5,10/2,10/2,$fn=60);
                    } //end union
    //start subtraction of difference
                  translate([-5,0,-2.5]) rotate([0,0,0]) cube([10,10,10]);
    } //end difference
}//end foot

module dual_banna_jack() {
    //create tabed foot
    difference() {
            union() {//start union
                  translate([-9.5,0,0]) rotate([0,0,0]) cylinder(10,11.5/2,11.5/2,$fn=60);
                  translate([9.5,0,0]) rotate([0,0,0]) cylinder(10,11.5/2,11.5/2,$fn=60);
                    } //end union
    //start any subtraction of difference below if needed

    }//end difference
}//end foot
/*----------------------End Code----------------------*/

```


[User]
I'd like to design a parametric cooling stand for electronics, like a game console. I want it to be a rectangular box with some air holes and a slight underhang on the sides, plus some small feet on the bottom.

Here are the basic features I'm looking for:

*   **Overall Shape:** A rectangular box. I want to control the width, length, and height. There should be a consistent thickness for the walls. The base should have an underhang.
*   **Air Holes:** I want circular air holes on the top face arranged in a grid-like pattern.  It's important that the holes be symmetrical and always aligned down the center along both axes. I need to control the size of these holes and the spacing between them, independently for the x and y directions.
*   **Feet:** I need small cylindrical feet on the bottom at each corner to elevate the stand. They should have a small recessed area where the stand will touch the ground.
*   **Parametric Design:** I need to be able to adjust all these dimensions, like the width, length, height, thickness, hole size, hole spacing, underhang height, and foot size through parameters.
*   **No Libraries**: I do not want to use any OpenSCAD libraries.

I would like all the code to be in one single `.scad` file.

[Assistant]
Parametric_Stand.scad:
```
///Parameters///
//measurments in milimeters
//note: change width/length first, then adjust hole_spacing for each

width = 160;
length = 120;
thickness = 4;
height = 20;
underhang = 2;
hole_size = 10;
hole_spacing_x = 4;
hole_spacing_y = 5;

//code
module cooling_stand ()
{
    difference(){
        cube([width,length,height],center=true);
        cube([width-2*thickness,length-2*thickness,height+0.02],center=true);
     translate([0,0,height/2-.5*underhang+0.01])cube([width-thickness,length-thickness,underhang],center=true);
    }
}

module hole()
{
    rotate([90,0,0])scale([1,1.4,1])cylinder(h=thickness+0.01,d=hole_size,$fn=50,center=true);
}
module air_holes()
{
    //determines how many holes to make on x axis
    number_holes_x=round((width-2*thickness)/hole_size);
    for(i=[1:1:number_holes_x/2-1])
    {
        translate([-hole_size-hole_spacing_x+i*(hole_size+hole_spacing_x),-length/2+(thickness/2),0])hole();
    }
    for(j=[1:1:number_holes_x/2-2])
    {
        translate([-j*(hole_size+hole_spacing_x),-length/2+(thickness/2),0])hole();
    }

    mirror([0,1,0])
    {

    for(i=[1:1:number_holes_x/2-1])
    {
        translate([-hole_size-hole_spacing_x+i*(hole_size+hole_spacing_x),-length/2+(thickness/2),0])hole();
    }
    for(j=[1:1:number_holes_x/2-2])
    {
        translate([-j*(hole_size+hole_spacing_x),-length/2+(thickness/2),0])hole();
    }
    }

    //determine how many holes to make on y axis
    number_holes_y=round((length-2*thickness)/hole_size);
    for(k=[1:1:number_holes_y/2-1])
    {
        translate([width/2-thickness/2,hole_spacing_y+hole_size-k*(hole_size+hole_spacing_y),0])rotate([0,0,90])hole();
    }
    for(l=[1:1:number_holes_y/2-2])
    {
        translate([width/2-thickness/2,l*(hole_size+hole_spacing_y),0])rotate([0,0,90])hole();
    }
    mirror([1,0,0])
    {
        number_holes_y=round((length-2*thickness)/hole_size);
    for(k=[1:1:number_holes_y/2-1])
    {
        translate([width/2-thickness/2,hole_spacing_y+hole_size-k*(hole_size+hole_spacing_y),0])rotate([0,0,90])hole();
    }
    for(l=[1:1:number_holes_y/2-2])
    {
        translate([width/2-thickness/2,l*(hole_size+hole_spacing_y),0])rotate([0,0,90])hole();
    }
    }

}

module footpads()
{
    translate([-width/2+0.01,-length/2+0.01,-height/2])difference(){cylinder(h=2,d=20,$fn=50);
    translate([0,0,-1])cube([10,10,4]);}

    translate([width/2-0.01,length/2-0.01,-height/2])rotate([0,0,180])difference(){cylinder(h=2,d=20,$fn=50);
    translate([0,0,-1])cube([10,10,4]);}

    translate([width/2-0.01,-length/2+0.01,-height/2])rotate([0,0,90])difference(){cylinder(h=2,d=20,$fn=50);
    translate([0,0,-1])cube([10,10,4]);}

    translate([-width/2+0.01,length/2-0.01,-height/2])rotate([0,0,-90])difference(){cylinder(h=2,d=20,$fn=50);
    translate([0,0,-1])cube([10,10,4]);}
}

difference()
{
cooling_stand();
air_holes();
}
footpads();
```


[User]
Hey, I'm looking for some help creating a parametric OpenSCAD design. I'm trying to make a customizable container, specifically something I could use as a pen holder, but with a lot of flexibility in how it's constructed.

The core idea is a cylindrical shape with screw-like, helical "pillars" running up the inside walls. I want these to be controlled by a few parameters. I'd like to be able to adjust the pitch of the helix, the number of pillars, the overall height, the radius of the main cylinder, and the radius of the individual pillar "grooves". I'd also like the ability to have the helix go in both directions on the inside of the cylinder.

I'm envisioning a few ways to cap this off and create a usable container. I need the option to add a solid or hollow base to the bottom, along with a solid or hollow rim at the top. I'll need to be able to adjust the height of both the rim and base, and define whether the rim and base are solid, or just a thin wall.

Basically, it should work like this: I'll specify parameters like the radius of the main cylinder, the pitch of the helical grooves, how tall it should be, etc, and it'll create the helical shape. Then, optionally, I can have a rim added to the top and a base to the bottom, each of which can have customizable heights and be filled-in or hollow.

Can you help me generate a parametric OpenSCAD file (or files) to accomplish this? I don't have any specific libraries I need to use in mind. I'm hoping to keep it simple. I'd like it to be easily customizable.

[Assistant]
screw.scad:
```
// Parametric screw-like things (ball screws, augers)
// License: GNU LGPL 2.1 or later.
// © 2010 by Elmo Mäntynen

pitch = 450;
pillars = 15;
height = 100;
radius = 50;
pillar_radius = 3;
base_yes_or_no = "yes";
base_solid_yes_or_no = "yes";
base_height = 2;
rim_yes_or_no = "yes";
rim_solid_yes_or_no = "no";
rim_height = 2;
both_directions_yes_or_no = "yes";

if (both_directions_yes_or_no == "yes"){
for (rotation = [0:360/pillars:360]){
echo (rotation);
test_ball_groove(
    rotation = rotation,
    pitch = -pitch,
    height = height,
    radius = radius,
    pillar_radius = pillar_radius);
}

}
for (rotation = [0:360/pillars:360]){
echo (rotation);
test_ball_groove(
    rotation = rotation,
    pitch = pitch,
    height = height,
    radius = radius,
    pillar_radius = pillar_radius);
}

if (rim_yes_or_no == "yes"){
rim(radius = radius + pillar_radius,height=height,rim_height=rim_height);
}
if (base_yes_or_no == "yes"){
base(radius = radius + pillar_radius, base_height = base_height);
}

module helix(pitch, height, rotation, slices=500){
    rotate(rotation){
    rotations = height/pitch;
    linear_extrude(height=height, center=false, convexity=10, twist=360*rotations, slices=slices, $fn=100)
            child(0);}
}

module ball_groove(pitch, height, radius, rotation, pillar_radius) {
    helix(pitch, height, rotation, slices=height)
        translate([radius, 0, 0])
        circle(r = pillar_radius);
}

module test_ball_groove(){ ball_groove(pitch, height, radius, rotation, pillar_radius);}

module base(radius, base_height){
    difference (){
        linear_extrude(height = base_height)
        circle(r = radius,$fn=100);
        echo(base_height);
        if (base_solid_yes_or_no == "no"){
            translate([0,0,-base_height]){
        linear_extrude(height = base_height*3)
        circle(r = radius - (pillar_radius*2),$fn=100);
        }
    }
    }
}
module rim(radius,height,rim_height){
   difference (){
    translate([0,0,height]){

        linear_extrude(height = rim_height)
        circle(r = radius,$fn=100);
        }
    if (rim_solid_yes_or_no == "no"){
        translate([0,0,height - rim_height/2]){

        linear_extrude(height = rim_height+2)
        circle(r = radius - (pillar_radius*2),$fn=100);
            }
        }
    }
}

```


[User]
Hey, I'm looking to create a parametric adapter for different sized filament spools. I've got a couple of spools that have different sized center holes, and I want to be able to stack them, so I need an adapter that has different sized cylinders on the top and bottom.

Here are the specific things I'd like to be able to customize:

*   **Diameters:** The inner diameter of the top and bottom cylinder (where the spools fit).
*   **Heights:** The height/depth of both the top and bottom cylinders.
*   **Struts:** I want to have struts connecting the two cylinders, and I'd like to be able to specify how many struts there are.
*   **Strut Width:** I also need to control the width of the struts.
*   **Lip:** I'd like an optional lip around the bottom cylinder to help keep the adapter from falling through the larger hole, if that makes sense, and I want control over the size of that lip, both the thickness and how far out it extends from the cylinder. If I don't want a lip I don't want one there.
*   **Bevels:** I'd like a bevel on the top edges of the adapter, where the struts meet the cylinders.
*   **Fillets:** Where the struts meet in the middle, I'd like to be able to round that corner with a fillet if I want, and control the radius.
*   **Center Hole:** I may also need to have a hole in the center of the whole adapter, that's also configurable in diameter and obviously off by default, because that doesn't always make sense.

I'm imagining a design where there's a smaller cylinder on top, a larger cylinder on the bottom, and they're connected by these struts around the sides. The smaller cylinder can sit on top of the larger one, or they could be flipped for certain applications, which is why the lip would be useful.

I'd like to be able to control all of those aspects of the design. It seems like I should be using OpenSCAD for this, and I was hoping that you could generate the SCAD code for me to use. I'm not really sure if this is one scad file or more than one, but you should do it in whatever way makes sense to you. I'm hoping this will be fully parametric, so I can plug in numbers, and the adapter will change its shape to match.

[Assistant]
spool-adapter.scad:
```

/* [Dimensions] */
// Height/depth of large diameter side
large_height=10;
// Height/depth of small diameter side
small_height=10;

// Diameter of spool holes (makerbot spool is 82 and 53)
diameter1=82;
diameter2=53;

strut_width=10;

/* [Options] */
// Lip to hold adapter, use if larger spool hole will be on the bottom
lip=0; // [0:None,2:Small,3:Medium,5:Heavy]
// How far out the lip comes. 0 makes the lip come out as far as it is thick in a bevel (and doesn't need support!)
lip_extent=3; // [0:10]
// Hole in the middle, 0 to disable
hole_diameter=6;
hole=hole_diameter/2;

/* [Tweaks] */
struts=3; // [2:8]
bevel=2;

// Fillet joint between struts (0 to disable)
fillet_radius=8;

/* [Hidden] */

depth=[large_height,small_height];
depth1=large_height;
depth2=small_height;

radii=[max(diameter1,diameter2)/2,min(diameter1,diameter2)/2];

module inner_fillet(r,w,h) {
  angle = 360/(2*struts);
  rh = r/sin(angle);
  wh = w/(2*sin(angle));
  rha = r*sin(angle);
  rhb = rh-rha;
  ro=r*sin(90-angle);
  rl=sqrt(pow(wh+rhb,2)+pow(ro,2));
  difference() {
    cylinder(r=rl,h=h);
    for (i=[180/struts:360/struts:360]) {
      rotate([0,0,-i]) {
        translate([rh+wh,0,-0.1]) {
          cylinder(r=r,h=h+0.2);
        }
      }
    }
  }
}

module chamfer_strut(r,w,h,c) {
  intersection() {
    union() {
      translate([0,0,-min(h,c)]) {
        cylinder(r=r,h=h);
        translate([0,0,h]) {
          cylinder(r1=r,r2=r-c,h=c);
        }
      }
    }
    translate([0,-w/2,0]) {
      cube([r,w,h]);
    }
  }

}

module lip(r,w,t,e) {
  translate([0,0,t]) {
    mirror([0,0,1]) {
      if (e) {
        chamfer_strut(r=r+e,w=w,h=t,c=0);
      } else {
        chamfer_strut(r=r+t,w=w,h=t,c=t);
      }
    }
  }
}

difference() {
  h1=depth1 + lip;
  union() {
    for (i=[0:360/struts:360]) {
      rotate([0,0,i]) {
        if (fillet_radius) {
          inner_fillet(r=fillet_radius,w=strut_width,h=h1+depth[1]);
        }
        translate([0,0,depth[0]]) {
          mirror([0,0,1]) {
            chamfer_strut(r=radii[0],w=strut_width,h=depth[0],c=bevel);
          }
        }
        translate([0,0,h1]) {
          chamfer_strut(r=radii[1],w=strut_width,h=depth[1],c=bevel);
        }
        if (lip) {
          translate([0,0,depth[0]]) {
            lip(r=radii[0],w=strut_width,t=lip,e=lip_extent);
          }
        }
      }
    }
  }
  if (hole) {
    translate([0,0,-0.1]) {
      cylinder(r=hole,h=h1+depth[1]+0.2);
    }
  }
}

```


[User]
I'm looking to design some custom clips to hold my glass bed onto my 3D printer's heated bed, and I want to make sure it's parametric so I can easily adjust it if I ever get a different bed. I've seen some designs that use bulldog clips, but I want to avoid those because they take up print area and might interfere with my fan shroud.

My heated bed PCB is 1.75mm thick, and my glass bed is 3mm thick, 200mm wide and 214mm tall. I want the clips to overlap the top of the glass by about 7mm (that's the `ClipWidth`). The clips need to extend along the bed edge by 16mm (that's the `ClipLength`), and they should have an outer wall that is 2mm thick (`ClipOuterWallWidth`).  The top and bottom of the clips should both be 1mm thick (`ClipThickness`). I also need some holes for mounting, and I guess you should include a screw head recess/hole too. The mounting holes should be for M3 screws.

I need four clips, one for each corner. I'd like the file to have a "ShowPreview" option that will show the clips in position with the bed. If "ShowPreview" is set to false, it should just show the four clips in a row for printing.

Can you create this for me? I'd prefer it if you could use BOSL2 for the design.

[Assistant]
Glass_Holder.scad:
```
/**
 * Author: Luis Chardon <luischardon@gmail.com>
 * Description: Prusa i3 Heated Bed Glass Holder
 * Date Modified: 8/13/2016
 */

/* [Heated Bed Properties] */
// Heated Bed PCB Board Thickness
BedThickness = 1.75; // [1:0.01:3]

/* [Glass Bed Properties] */
// Thickness of your glass bed
GlassThickness = 3; // [1:0.1:5]
// Width of your glass bed
GlassWidth = 200; // [180:200]
// Height of your glass bed
GlassHeight = 214; // [200:214]

/* [Clip Properties] */
// Top and bottom clip thickness
ClipThickness = 1; // [0.5:0.1:3]
// How long the clip extends to cover the top of the glass bed
ClipWidth = 7; // [1:15]
// How long the clip extends along the perimeter of the bed
ClipLength = 16; // [5:50]
// Clip outer wall width
ClipOuterWallWidth = 2; // [1:5]

/* [Bed Preview] */
// Preview clips on the bed and glass
ShowPreview = "false"; // [false,true]

/* [Hidden] */
$fn=32;
BedWidthAndHeight = 214;
Hole = 20;
TotalHeight = ClipThickness + BedThickness + GlassThickness + ClipThickness;
SpacerWidth = (BedWidthAndHeight - GlassWidth) / 2;

module HoleLL()
{
    translate([2.5, 2.5, -Hole / 2]) cylinder(d = 3, h = Hole);
};
module HoleLR()
{
    translate([BedWidthAndHeight - 2.5, 2.5, -Hole / 2]) cylinder(d = 3, h = Hole);
};
module HoleTL()
{
    translate([2.5, BedWidthAndHeight - 2.5, -Hole / 2]) cylinder(d = 3, h = Hole);
};
module HoleTR()
{
    translate([BedWidthAndHeight - 2.5, BedWidthAndHeight - 2.5, -Hole / 2]) cylinder (d = 3, h = Hole);
};

module HeatedBed()
{
    difference(){
        color("red") cube([BedWidthAndHeight, BedWidthAndHeight, BedThickness]);
        HoleLL();
        HoleLR();
        HoleTL();
        HoleTR();
    }
}

module Glass()
{
    translate([SpacerWidth, (BedWidthAndHeight - GlassHeight) / 2, BedThickness]) color([1, 1, 1, 0.5]) cube([GlassWidth, GlassHeight, GlassThickness]);
}

module Holder()
{
    color("blue")
    {
        // Right clip
        difference()
        {
            translate([SpacerWidth, -ClipOuterWallWidth, -ClipThickness]) cube([ClipLength, ClipOuterWallWidth + ClipWidth, TotalHeight]);
            HeatedBed();
            Glass();
        }

        // Top Clip
        difference()
        {
            translate([-ClipOuterWallWidth, SpacerWidth, -ClipThickness]) cube([ClipOuterWallWidth + SpacerWidth, ClipLength, TotalHeight]);
            HeatedBed();
            Glass();
        }

        // Screw Spacer
        difference()
        {
            translate([2.5, 2.5, BedThickness]) cylinder(d = 7, h = 1);
            HoleLL();
        }

        // Screw Hole
        difference()
        {
            translate([-ClipOuterWallWidth, -ClipOuterWallWidth, -ClipThickness]) cube([SpacerWidth + ClipOuterWallWidth, SpacerWidth + ClipOuterWallWidth, TotalHeight]);
            // Screw body hole
            HoleLL();
            // Screw head hole
            translate([2.5, 2.5, BedThickness]) cylinder(d = 7, h = GlassThickness + ClipThickness + 0.1);
            // Spring bottom hole
            translate([2.5, 2.5, -ClipThickness - 0.1]) cylinder(d = 7, h = ClipThickness + 0.1);
            HeatedBed();
            Glass();
        }

    }
}

module Preview()
{
    Holder();
    translate([BedWidthAndHeight, BedWidthAndHeight, 0]) rotate(a=[0, 0, 180]) Holder();
    translate([BedWidthAndHeight, 0, 0]) mirror([1,0,0]) Holder();
    translate([0, BedWidthAndHeight, 0]) mirror([1,0,0]) rotate(a=[0, 0, 180]) Holder();
    HeatedBed();
    Glass();
}

module Print()
{
    spacex = 50;
    spacey = 50;
    rotation = 270;
    rotate(a=[0, rotation, 90]) Holder();
    translate([0, spacey, 0]) rotate(a=[0, rotation, 90]) Holder();
    translate([spacex, 0, 0]) mirror([1, 0, 0]) rotate(a=[0, rotation, 90]) Holder();
    translate([spacex, spacey, 0]) mirror([1, 0, 0]) rotate(a=[0, rotation, 90]) Holder();
}

if(ShowPreview == "true")
{
    Preview();
}
else
{
    Print();
}
```


[User]
I need a parametric cable clip design for round power cables. I've got a few specific things in mind. First, the clip should be designed for a variable cable diameter. I'll need to be able to specify the cable diameter as a parameter. The clip should also have a variable wall thickness, which I'd also want to specify. The clip will have an opening for inserting the cable, so that needs to be parameterized too – specifically, the angle of the opening.

I'd like to be able to stack these clips, essentially creating a multi-cable holder. So, I need a parameter for the number of rows of these clips. Each row would hold two clips.

The basic clip should have a round profile, but it should have a 'cutout' where the cable is inserted. The clip should have a flat back with the cable resting on that flat back, so the cutout is a segment of a circle but with the flat portion where the cable sits. There will be a cutout on the top of the clip to allow the cable to enter the clip.

Essentially, the clip is a circle with a flat bottom and a partial cutout on the top, that flat part of the cutout is how the cable would slide in. There should be a small radius on the top corners of the cutout where the cable would pass to keep from putting too much force on the cable when it’s inserted.

I'd like it all to be generated in OpenSCAD, using built-in functions. No external libraries needed.

[Assistant]
holder.scad:
```

// cable diameter
cable = 8;
// number of cable pairs for holder
rows = 1;
// wall thikness */
thik  = 1.5;
// size of opening for cable
angel = 50; // [90]

/*******************************************************************************/
/* [Hidden] */
$fn=50;

outer = cable + 2*thik;
clips(rows);

/* rows of dual clips */
module clips(num) {
    linear_extrude(height=3) {
	for(idx=[0 : 1 : num-1  ]) {
	    translate([0, outer * idx])
	    dual();
	}
    }
}

/* dual clip, centred */
module dual() {
    copy_mirror()
    translate([outer/2, outer/2])
    clip(cable, outer, angel);
}

/* single clip, centered */
module clip(cable, outer, angel) {
    difference() {
	union() {
	    /* fill in the middle */
	    translate([-outer/2,0])
	    square(outer/2);
	    translate([-outer/2,-outer/2])
	    square(outer/2);

	    /* outer circle */
	    circle(d=outer);
	}
	/* remove cable circle */
	circle(d=cable);
	polygon(points=[[0,0],[ outer/2, tan(angel)*outer/2],[outer/2,-tan(angel)*outer/2]]);
    }
    /* Add rouded edge */
    hyp = ((outer-cable)/2 + cable)/2;

    translate([ cos(angel)*hyp , sin(angel)*hyp])
    circle(d=(outer-cable)/2);
    translate([ cos(angel)*hyp , -sin(angel)*hyp])
    circle(d=(outer-cable)/2);
}

/******************************************************************************/
/* generic helpers */

module copy_mirror(vec=[1,0,0]) {
    children();
    mirror(vec) children();
}

```