[User]
Hey, I'm looking to get a customizable U-hook design, similar to one I saw online. The basic idea is a U-shaped hook with several adjustable parameters, and the ability to add a second hook and/or a mounting bracket at the base. I'd like to be able to specify the size of the hook's U shape, the thickness of the hook (which is the print's height), the length and angle of the optional second hook, the spacing between different elements of the hook (like mounting holes and the main U), sizes for mounting holes and their countersinks, and overall bracket size if that is chosen.

The hook should have the following parameters:
*   **bracket**: A boolean to choose between a classic hook with screw holes and a "bracket" system.
*   **bracket_round**: A boolean, only applicable if `bracket` is true, to choose between a square bracket and a round one.
*   **second_hook**: A boolean to add or omit a second hook.
*   **hook_size**: The internal diameter of the main U shape.
*   **thickness**: The hook's thickness, which is the object's width and print's height.
*   **second_hook_lenght**: The length of the second hook if enabled.
*   **second_hook_angle**: The angle of the second hook if enabled.
*   **spacer_1**: The space between the main hook and the bottom screw (or the bracket base).
*   **spacer_2**: The space between the bottom screw and the secondary hook or the next section of bracket.
*   **spacer_3**: The space between the second hook and the top screw (or the next section of bracket).
*   **spacer_4**: The space between the top screw (or the bracket's edge) and the hook's rounded top.
*  **screw_diam**: The diameter of the screws used in mounting holes.
*  **screw_head**: The diameter of screw heads for countersinks.
*  **screw_head_h**: The depth of screw head countersinks.
*  **tolerance**: A tolerance value for easy screw fitting.
*   **bracket_size**: The main size of the bracket (if enabled).
*   **stop_lenght**: The back length of the bracket (if enabled).
*   **bracket_stiffness**: Stiffness value for square bracket.
*   **safety_screw**: A boolean, only applicable if `bracket` is true and bracket is square, to include a screw hole in the bracket.
*   **extremity**: A boolean to have a triangular tip on the hook's main U shape or not.
*   **screw_holes**: A boolean to include screw holes or not.
*   **rounded_top**: A boolean to enable or disable the rounded top on the hook.

I'd also like the code to include clear comments explaining the different parts and parameters. Finally, I'd prefer that the dimensions of the hook (total X, Y, and Z size) are output to the console when the design is compiled. I don't have any code yet to work from so you'll need to write the entire SCAD file. I don't need to use any particular libraries at the moment.

[Assistant]
customizable_U_hook_updated.scad:
```
/*----------------------------------------------------------------------------*/
/*-------                         INFORMATIONS                        --------*/
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/

// CUSTOMIZABLE U-HOOK (parametric and very strong hook)
// by Serge Payen, January 2016
// www.sergepayen.fr/en/parametric-u-hook
// "customizable_u_hook" is licenced under Creative Commons :
// Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
// http://creativecommons.org/licenses/by-nc-sa/4.0/

// HOW TO USE THIS FILE :

// -- Solution 1 :
// Open this file with OpenScad software (free and open-source)
// http://www.openscad.org/downloads.html
// Choose your parameters in the SETTINGS chapter (see below)
// Press F5 to compile and see the resulting hook
// Check your hook's global size in the console window (below viewing area)
// If OK, press F6 to render
// Go to : File => Export => Export as STL : choose filename and location
// Save the STL file of your customized hook
// Send this STL file to your 3D printer

// -- Solution 2 :
// This file had been optimized for Thingiverse Customizer
// You will need to have a Thingiverse Account, then :
// Go to object's page on Thingiverse
// Click on the button "Open in Customizer"
// Choose your settings in parameters tabs
// Save the STL file of your customized hook
// Send this STL file to your 3D printer

/*----------------------------------------------------------------------------*/
/*-------                           SETTINGS                          --------*/
/*----------------------------------------------------------------------------*/

/* [HOOK SHAPE] */

// Choose between classic hook with screw-holes (0) or "bracket" system (1)
bracket=0; // [0, 1]

// Choose between square (0) and round bracket (1)
bracket_round=0; // [0, 1]

// Choose to have a second hook (1) or not (0)
second_hook=1; // [0, 1]

/* [MAIN HOOK SIZE] */

// Intern diameter of hook's main U shape
hook_size=35; // [0.1:250]

// Hook's "thickness" = object's width = print's height
thickness=25; // [0.1:250]

/* [SECOND HOOK] */

// Lenght of second hook. Good values are around "Hook Size" x 0.75
second_hook_lenght=30; // [0.1:200]

// Angle of second hook. Best is between 45° and 65°.
second_hook_angle=55; // [0:90]

/* [SPACERS] */

// Space between main hook and bottom screw
spacer_1=20; // [0:200]

// Space between bottom screw and secondary hook
spacer_2=10; // [0:200]

// Space between second hook and top screw
spacer_3=10; // [0:200]

// Space between top screw and hook's rounded top
spacer_4=10; // [0:200]

/* [SCREW-HOLES] */

// Diameter of the screw you plan to use
screw_diam=3; // [0:0.5:20]

// Diameter of screw-head
screw_head=8; // [0:0.5:40]

// Screw-head height (deepness for screw-head hole)
screw_head_h=3; // [0:0.5:20]

// Tolerance, for screw easy-fitting
tolerance=0.5; // [0:0.1:10]

/* [BRACKET] */

// Bracket's main size
bracket_size=40; // [0:250]

// Bracket's back lenght
stop_lenght=15; // [0:250]

// Bracket Stiffness (only with square bracket)
bracket_stiffness=2.5; // [0:100]

/* [EXTRA SETTINGS] */

// Choose to have a screw-hole in square bracket (1), or not (0)
safety_screw=0; // [1, 0]

// Choose to have the hook's "triangle" extremity (1) or not (0)
extremity=1; // [1, 0]

// Choose to have screw-holes (1) or not (0)
screw_holes=1; // [1, 0]

// Choose to have the hook's rounded "top" (1) or not (0)
rounded_top=1; // [1, 0]

/*------------------------------------------------------------------------------

NOTE about GENERAL DIMENSIONS AND CUSTOM HEIGHTS SETTINGS :

To respect general shape's efficiency, global size is relative to "hook_size".
Change "hook_size" for a bigger or smaller hook, then choose more options.
Different values for "spacer_1,2,3,4" will change size on Y-axis.

When compiling, OpenScad will return the total dimensions in the console window.
Keep in mind the hook is printed "laying on his side" on print bed.
In the first few lines of console window (below viewing area), you can read :
ECHO : TOTAL_SIZE_ON_X_AXIS = x (total width : adjust "hook_size" and/or bracket)
ECHO : TOTAL_SIZE_ON_Y_AXIS = y (total lenght : adjust with "spacer_1/2/3/4")
ECHO : TOTAL_SIZE_ON_Z_AXIS = z (total height : adjust "thickness")
It will also return informations about all other strategic sizes.
Console will also display warning messages if some values are illogic.

------------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------*/
/*-------                             CODE                            --------*/
/*----------------------------------------------------------------------------*/

/*____________________________________________________________________________*/
/* [HIDDEN] */
// shortcuts
stiffness=hook_size/4;
big_r=hook_size/5;
small_r=stiffness/2;
height_bottom=hook_size;
width_global=hook_size+stiffness*2;
half_width=width_global/2-stiffness/2;
screw_hole=screw_diam+tolerance*2;
screw_house=screw_head+tolerance*2;
bracket_move=bracket_size/2+width_global/2;
bracket_round_diam=bracket_size+stiffness*2;
min_height1=spacer_1+screw_house/2+stiffness;
min_height2=min_height1+spacer_2/2+screw_house/2;
min_height2_hg=spacer_1+stiffness+spacer_2/2;
min_height3=min_height2+spacer_3/2+spacer_2/2;
min_height3_hg=min_height2_hg+spacer_3/2+spacer_2/2;
min_height4=min_height3+spacer_4/2+spacer_3/2+screw_house;
min_height4_hg=min_height3_hg+spacer_3/2+spacer_4/2;
space_global=spacer_1+spacer_2+spacer_3+spacer_4;
$fn=150;

// remove specific colors for each module
color ("Gold")
translate ([hook_size/2,-hook_size/3,thickness/2])
rotate ([0,0,0])
uhook ();

echo (TOTAL_SIZE_ON_Z_AXIS=thickness);
echo (MAIN_HOOK_INTERN_DIAMETER=hook_size);

if (bracket)
{
    echo (BRACKET_SIZE=bracket_size);
    echo (BRACKET_STIFFNESS=bracket_stiffness);
    echo (STOP_LENGHT=stop_lenght);
}
else
{
    echo (SCREW_HOLES_DIAMETER=screw_diam);
    echo (SCREW_HEAD_DIAMETER=screw_head);
    echo (SCREW_HEAD_HEIGHT=screw_head_h);
}

if ((bracket)&&(safety_screw))
{
    echo (SAFETY_SCREW_DIAMETER=screw_diam);
    echo (SAFETY_SCREW_HEAD_DIAMETER=screw_head);
    echo (SAFETY_SCREW_HEAD_HEIGHT=screw_head_h);
}

if (second_hook)
{
    echo (SECOND_HOOK_LENGHT=second_hook_lenght);
    echo (SECOND_HOOK_ANGLE=second_hook_angle);
}

/*____________________________________________________________________________*/
// final union of all modules
module uhook ()
{
    union ()
    {

        // hook's base, this part don't depend on hook's type
        belly ();

        translate ([0,-height_bottom/2-stiffness,0])
        bottom ();

        translate ([half_width,stiffness,0])
        rotate ([0,90,0])
        tip ();

        // conditionnal part, depending on hook's type
        if (bracket)
        {
            translate ([-half_width,stiffness+spacer_1/2,0])
            addH1 ();
            translate ([-half_width,min_height2_hg,0])
            addH2 ();
        }
        else
        {
            translate ([-half_width,stiffness+spacer_1/2,0])
            addH1 ();
            translate ([-half_width,min_height1,0])
            screw ();
            translate ([-half_width,min_height2,0])
            addH2 ();
        }

        if ((bracket)&&(second_hook))
        {
            translate ([-width_global/2,min_height2_hg+spacer_2/2,-thickness/2])
            arm ();
            translate ([-half_width,min_height3_hg+hook_size,0])
            addH3 ();
            translate ([-half_width,min_height4_hg+hook_size,0])
            addH4 ();
            if (bracket_round)
            {
            translate ([-width_global/2-bracket_round_diam/2+stiffness,min_height4_hg+hook_size+spacer_4/2,0])
            sHook ();
            //width calculation
            width_total=width_global-stiffness+bracket_round_diam;
            echo (TOTAL_SIZE_ON_X_AXIS=width_total);
            //height calculation
            height_global=hook_size*2+stiffness*2+space_global+bracket_round_diam/2;
            echo (TOTAL_SIZE_ON_Y_AXIS=height_global);
            }
            else
            {
                translate ([-half_width,min_height4_hg+hook_size+spacer_4/2+stiffness/2,0])
                head ();
                translate ([-bracket_move,min_height4_hg+hook_size+spacer_4/2+stiffness-bracket_stiffness/2,0])
                hang ();
                //width calculation
                width_total=width_global+bracket_size+bracket_stiffness;
                echo (TOTAL_SIZE_ON_X_AXIS=width_total);
                //height calculation
                height_global=hook_size*2+stiffness*3+space_global;
                echo (TOTAL_SIZE_ON_Y_AXIS=height_global);
            }

        }

        else if (second_hook)
        {
            translate ([-width_global/2,min_height2+spacer_2/2,-thickness/2])
            arm ();
            translate ([-half_width,min_height3+hook_size,0])
            addH3 ();
            translate ([-half_width,min_height3+hook_size+spacer_3/2+screw_house/2,0])
            screw ();
            translate ([-half_width,min_height4+hook_size,0])
            addH4 ();
            translate ([-half_width,min_height4+hook_size+spacer_4/2+stiffness/2,0])
            head ();
            //height calculation
            height_global=hook_size*2+stiffness*3+screw_house*2+space_global;
            echo (TOTAL_SIZE_ON_Y_AXIS=height_global);
        }
        else if (bracket)
        {
            translate ([-half_width,min_height3_hg,0])
            addH3 ();
            translate ([-half_width,min_height4_hg,0])
            addH4 ();
            if (bracket_round)
            {
                translate ([-width_global/2-bracket_round_diam/2+stiffness,min_height4_hg+spacer_4/2,0])
                sHook ();
                //width calculation
                width_total=width_global-stiffness+bracket_round_diam;
                echo (TOTAL_SIZE_ON_X_AXIS=width_total);
                //height calculation
                height_global=hook_size+stiffness*2+space_global+bracket_round_diam/2;
                echo (TOTAL_SIZE_ON_Y_AXIS=height_global);
            }
            else
            {
                translate ([-half_width,min_height4_hg+spacer_4/2+stiffness/2,0])
                head ();
                translate ([-bracket_move,min_height4_hg+spacer_4/2+stiffness-bracket_stiffness/2,0])
                hang ();
                //width calculation
                width_total=width_global+bracket_size+bracket_stiffness;
                echo (TOTAL_SIZE_ON_X_AXIS=width_total);
                //height calculation
                height_global=hook_size+stiffness*3+space_global;
                echo (TOTAL_SIZE_ON_Y_AXIS=height_global);
            }

        }
        else
        {
            translate ([-half_width,min_height3,0])
            addH3 ();
            translate ([-half_width,min_height3+spacer_3/2+screw_house/2,0])
            screw ();
            translate ([-half_width,min_height4,0])
            addH4 ();
            translate ([-half_width,min_height4+spacer_4/2+stiffness/2,0])
            head ();
            //height calculation
            height_global=hook_size+stiffness*3+screw_house*2+space_global;
            echo (TOTAL_SIZE_ON_Y_AXIS=height_global);
        }

    }

}

/*____________________________________________________________________________*/
// hook's bottom shape, with a hole inside
module bottom ()
{
    color ("Gold")
    difference ()
    {
        // bottom
        intersection ()
        {
            cube ([width_global,height_bottom+0.1,thickness], center=true);

            translate ([-stiffness,height_bottom/2,0])
            cylinder(r=hook_size/2+stiffness*2, h=thickness+0.1, center=true);

        }

        // hole
        hull ()
        {
            translate ([-big_r/2-stiffness/4,0,0])
            cylinder (r=big_r, h=thickness+0.2, center=true);

            translate ([big_r,stiffness/2,0])
            cylinder (r=small_r, h=thickness+0.2, center=true);

        }

    }

}

/*____________________________________________________________________________*/
// main hook's U-shape
module belly ()
{
    color ("Crimson")
    difference ()
    {
        // base cube
        cube ([width_global,hook_size/2,thickness], center=true);

        // half-cylindric hole
        translate ([0,hook_size/4,0])
        cylinder (r=hook_size/2, h=thickness+0.1, center=true);

    }
}

/*____________________________________________________________________________*/
// screw-hole module
module screw ()
{
    if (thickness>screw_house*8)
    {
        color ("Silver")
        difference ()
        {
            //base cube
            cube ([stiffness,screw_house,thickness], center=true);

            if (screw_holes)
            {
                // screw1 hole
                translate ([0,0,thickness/4])
                rotate ([0,90,0])
                cylinder (d=screw_hole, h=stiffness+0.1, center=true);

                // screw1-head hole 1
                translate ([stiffness/2-screw_head_h/2+0.1,0,thickness/4])
                rotate ([0,90,0])
                cylinder (d=screw_house, h=screw_head_h, center=true);

                // screw2 hole
                translate ([0,0,-thickness/4])
                rotate ([0,90,0])
                cylinder (d=screw_hole, h=stiffness+0.1, center=true);

                // screw2-head hole 1
                translate ([stiffness/2-screw_head_h/2+0.1,0,-thickness/4])
                rotate ([0,90,0])
                cylinder (d=screw_house, h=screw_head_h, center=true);
            }
        }

    }
    else
    {
        color ("Silver")
        difference ()
        {
            //base cube
            cube ([stiffness,screw_house,thickness], center=true);

            if (screw_holes)
            {
                // screw hole
                rotate ([0,90,0])
                cylinder (d=screw_hole, h=stiffness+0.1, center=true);

                // screw-head hole
                translate ([stiffness/2-screw_head_h/2+0.1,0,0])
                rotate ([0,90,0])
                cylinder (d=screw_house, h=screw_head_h, center=true);
            }

        }
    }

}

/*____________________________________________________________________________*/
// hook's triangle extremity
module tip ()
{
    if (extremity)
    color ("Gold")
    difference ()
    {
        hull ()
        {
            translate ([thickness/2-thickness/10,0,0])
            cylinder (d=thickness/5, h=stiffness, center=true);
            translate ([-thickness/2+thickness/10,0,0])
            cylinder (d=thickness/5, h=stiffness, center=true);

            translate ([thickness/7,thickness/5,0])
            cylinder (d=thickness/5, h=stiffness, center=true);
            translate ([-thickness/7,thickness/5,0])
            cylinder (d=thickness/5, h=stiffness, center=true);
        }

        translate ([0,-thickness/4,0])
        cube ([thickness+0.1, thickness/2, thickness], center=true);

    }
    else
    {
        hull ()
        {
            translate ([thickness/2-thickness/10,0,0])
            cylinder (d=thickness/5, h=stiffness, center=true);
            translate ([-thickness/2+thickness/10,0,0])
            cylinder (d=thickness/5, h=stiffness, center=true);
        }
    }

}

/*____________________________________________________________________________*/
// secondary hook
module arm ()
{
    color ("Orange")
    union ()
    {
        cube ([stiffness, hook_size, thickness]);

        translate ([0,stiffness,0])
        union ()
        {
            rotate ([0,0,-second_hook_angle])
            union ()
            {
                hull ()
                {
                    cube ([stiffness, second_hook_lenght, thickness]);
                    rotate ([0,0,second_hook_angle])
                    translate ([0,-stiffness,0])
                    cube ([stiffness, stiffness, thickness]);
                }

                rotate ([0,90,0])
                translate ([-thickness/2,second_hook_lenght,stiffness/2])
                tip ();
            }
        }
    }

}

/*____________________________________________________________________________*/
// hook's rounded top
module head ()
{
    color ("Gold")
    intersection ()
    {
        cube ([stiffness,stiffness,thickness], center=true);
        if (rounded_top)
        translate ([-stiffness/2,-stiffness/2,0])
        cylinder (r=stiffness, h=thickness+0.2, center=true);
    }

}

/*____________________________________________________________________________*/
// Square bracket, rectangular part to clip on a door's top
module hang ()
{
    union ()
    {
        //bracket part 1, on one side of safety screw
        color ("Crimson")
        translate ([bracket_size/4+screw_house/4,0,0])
        cube ([bracket_size/2-screw_house/2,bracket_stiffness,thickness], center=true);

        //safety screw
        if (safety_screw)
        {
            color ("Silver")
            difference ()
            {
                cube ([screw_house,bracket_stiffness,thickness],center=true);
                rotate ([90,0,0])
                cylinder (d=screw_hole, h=bracket_stiffness+0.1, center=true);
                translate ([0,bracket_stiffness/2-screw_head_h/2,0])
                rotate ([90,0,0])
                cylinder (d=screw_house, h=screw_head_h+0.1, center=true);
            }

            //bracket part 2, on the other side of safety screw
            color ("Crimson")
            translate ([-bracket_size/4-screw_house/4,0,0])
            cube ([bracket_size/2-screw_house/2,bracket_stiffness,thickness], center=true);

            //stop
            color ("Orange")
            translate ([-bracket_size/2-bracket_stiffness/2,0,0])

            union ()
            {
                // rounding part between bracket top part and stop
                intersection ()
                {
                    cube ([bracket_stiffness,bracket_stiffness,thickness],center=true);
                    translate ([bracket_stiffness/2,-bracket_stiffness/2,0])
                    cylinder (r=bracket_stiffness, h=thickness, center=true);
                }

                difference ()
                {
                    // stop main cube
                    color ("DeepSkyBlue")
                    translate ([0,-stop_lenght/2-bracket_stiffness/2,0])
                    cube ([bracket_stiffness,stop_lenght,thickness], center=true);

                    // rounding stop's bottom extremity
                    if (stop_lenght>=bracket_stiffness)
                    translate ([0,-stop_lenght,0])
                    difference ()
                    {
                        cube ([bracket_stiffness+0.1,bracket_stiffness+0.1,thickness+0.1],center=true);
                        translate ([bracket_stiffness/2,bracket_stiffness/2,0])
                        cylinder (r=bracket_stiffness, h=thickness+0.2, center=true);
                    }
                }

            }

        }

        else
        {
            union ()
            {
                //bracket main size (top part)
                color ("Crimson")
                cube ([bracket_size,bracket_stiffness,thickness],center=true);

                // rounding part between bracket top part and stop
                translate ([-bracket_size/2-bracket_stiffness/2,0,0])
                intersection ()
                {
                    cube ([bracket_stiffness,bracket_stiffness,thickness],center=true);
                    translate ([bracket_stiffness/2,-bracket_stiffness/2,0])
                    cylinder (r=bracket_stiffness, h=thickness, center=true);
                }

                difference ()
                {
                    color ("DeepSkyBlue")
                    // stop main cube
                    translate ([-bracket_size/2-bracket_stiffness/2,-stop_lenght/2-bracket_stiffness/2,0])
                    cube ([bracket_stiffness,stop_lenght,thickness], center=true);

                    // rounding stop's bottom extremity
                    if (stop_lenght>=bracket_stiffness)
                    translate ([-bracket_size/2-bracket_stiffness/2,-stop_lenght,0])
                    difference ()
                    {
                        cube ([bracket_stiffness+0.1,bracket_stiffness+0.1,thickness+0.1],center=true);
                        translate ([bracket_stiffness/2,bracket_stiffness/2,0])
                        cylinder (r=bracket_stiffness, h=thickness+0.2, center=true);
                    }
                }

            }
        }

    }
}

/*____________________________________________________________________________*/
// Rounded bracket, to clip hook on a tube
module sHook ()
union ()
{
    // difference to erase bottom half
    difference ()
    {
        // difference between extern and intern diameters
        color ("Crimson")
        difference ()
        {
            cylinder (d=bracket_round_diam, h=thickness, center=true);
            cylinder (d=bracket_size,h=thickness+0.1, center=true);
        }

        //cube to erase bottom half
        translate ([0,-bracket_round_diam/4,0])
        cube ([bracket_round_diam+0.1,bracket_round_diam/2,thickness+0.1], center=true);
    }

    // rounded extremity
    color ("DeepSkyBlue")
    hull ()
    {
        translate ([-bracket_round_diam/2+stiffness/2,0,0])
        cylinder (d=stiffness, h=thickness, center=true);
        translate ([-bracket_round_diam/2+stiffness/2,-stop_lenght+stiffness/2,0])
        cylinder (d=stiffness, h=thickness, center=true);
    }

}

/*____________________________________________________________________________*/
// spacer_1 : custom height above main hook, below bottom screw
module addH1 ()
{
    color ("Cyan")
    cube ([stiffness,spacer_1,thickness], center=true);
}

/*____________________________________________________________________________*/
// spacer_2 : custom height above bottom screw, below secondary hook
module addH2 ()
{
    color ("DeepSkyBlue")
    cube ([stiffness,spacer_2,thickness], center=true);
}

/*____________________________________________________________________________*/
// spacer_3 : custom height above secondary hook, below top screw
module addH3 ()
{
    color ("DodgerBlue")
    cube ([stiffness,spacer_3,thickness], center=true);
}

/*____________________________________________________________________________*/
// spacer_4 : custom height above top screw, below rounded top
module addH4 ()
{
    color ("DarkBlue")
    cube ([stiffness,spacer_4,thickness], center=true);
}

/*____________________________________________________________________________*/
/*____________________________________________________________________________*/
/*____________________________________________________________________________*/
// Warning messages

if ((bracket)&&(safety_screw)&&(bracket_round!=true))
{
    if (thickness<screw_house*2)
    echo (" WARNING : Safety Screw Hole seems too big compare to Thickness ");
    if (screw_head_h>bracket_stiffness)
    echo (" WARNING : Safety Screw Head Height seems too big compare to Bracket Stiffness ");
    if (screw_head<=screw_diam)
    echo (" WARNING : Screw Head Diameter should be bigger than Screw Diameter ");
    if (bracket_size<=screw_house)
    echo (" WARNING : Bracket Size seems too small compare to Screw Holes ");
    if (stop_lenght<bracket_stiffness)
    echo (" WARNING : Stop Lenght should be bigger than Bracket Stiffness ");
}

if (bracket!=true)
{
    if (thickness<screw_house*2)
    echo (" WARNING : Screw Holes seems too big compare to Thickness ");
    if (screw_head<=screw_diam)
    echo (" WARNING : Screw Head Diameter should be bigger than Screw Diameter ");
    if (screw_head_h>stiffness/2)
    echo (" WARNING : Screw Head Height seems too big compare to Hook Size");
}

if ((bracket!=true)&&(second_hook!=true))
{
    if (spacer_2+spacer_3<screw_house)
    echo (" WARNING : Screws seems too close. Push up value of Spacer 2 or 3 ");
}

if (second_hook)
{
    if (second_hook_lenght>hook_size)
    echo (" WARNING : Second Hook Lenght should be smaller than Hook Size ");
    if (second_hook_lenght<hook_size/3)
    echo (" WARNING : Second Hook Lenght seems very small compare to Hook Size ");
    if (second_hook_angle<45)
    echo (" WARNING : Best values for Second Hook Angle are between 45° and 65° ");
    if (second_hook_angle>65)
    echo (" WARNING : Best values for Second Hook Angle are between 45° and 65° ");
}

```


[User]
Okay, I'm looking to create a modular shelving system using 3D printed connectors, similar to the one described in the provided OpenSCAD file. I'd like a system that's highly customizable and can handle different panel thicknesses and connection styles. I need a complete set of OpenSCAD files that can generate the connectors and any necessary additional parts (like hinges).

Here’s what I’m imagining:

**Core Connector Design:**

*   **Parametric Connectors:** I need to be able to generate connectors for joining 1, 2, 3, or 4 panels at right angles.
*   **Panel Thickness:** The primary parameter should be the thickness of the panels or desks we'll be connecting.  I'd want to define this as `panel_thickness` in millimeters. Let's include `wall_thickness` in millimeters as well.
*   **Connector Dimensions:** The length and width of the connector should be adjustable, ideally using `connector_length` and `connector_width` in millimeters.
*   **Secure Filament Hole:** Each connector needs a hole to insert a filament for added securing. The diameter of this hole should be determined by the `secure_filament_thickness` parameter.

**Connection Options:**

*   **Number of Connectors:** Should be able to choose 1, 2, 3 or 4 connecting parts in a connector, for example to build a corner with only 2 connecting parts, or a cube with 4 connecting parts
*   **Hinges:**
    *   I want to add optional hinges to the connectors for doors.
    *   The hinges should be controlled via a boolean `include_hinges`.
    *   The axis of rotation can be set by a string parameter `hinge_axis` ("x" or "y").
     *    The direction of hinge can be set with string `hinge_rotation` ("up" or "down")
    *   The position of hinge should be set with `hinges_positon` ("left_down","right_down","both_down","left_up","right_up","both_up","all")
*   **Corner Arcs:**
    *   I'd like rounded corners on the connectors using arcs, using a boolean parameter `include_arcs`
     *   If hinges are used, arcs can't be generated in the same place where hinge is

**Overall Functionality:**

*   **Modular Design:** The system should use modules for easy modification and expansion.
*   **Easy Customization:** All the main dimensions should be changeable via parameters.

**Specific Requirements for OpenSCAD:**

*   **Files:** Please organize the design into separate .scad files for each core part (like the base connector and the hinges), and a main .scad file to bring it all together.
*   **Libraries:** Don’t need any external libraries.
*   **Clear Naming:** Use clear and concise variable names.
*   **Comments:** Include comments to explain how the code works and each variable's purpose.

Could you create these OpenSCAD files for me? I'm looking forward to trying this out!

[Assistant]
connectorV3.scad:
```

//celkovy cas: 4:07

//variables
/* [Hidden] */
//fragment number
$fn = 100;

/* [Main] */
//thickness of desks in mm
thickness_of_desks=5;
//thickness of walls in mm
thickness_of_walls = 1.2;
//length of connectors in mm
length_of_connectors = 25;
//width of connectors
width_of_connectors = 20;

number_of_connectors = 1; //[1:4]

secure_filament_thickness = 1.75; //[1.75,3.0]

/* [Addons] */
//Hinges or Arcs or Both - when both, arcs dont appear where hinge is
addons="none"; //[none,hinges,arcs,both]
// set on which axis you need hinges - this means the rotation of the connector in shelf
hinge_axis = "x"; //[x,y]

hinge_rotation = "up"; //[up,down]
//make sure customizer shows up all hinges(use rotation a lot, its a bit buggy)
hinges_positon="both_up";//[left_down,right_down,both_down,left_up,right_up,both_up,all]

arcs = (addons=="arcs" || addons=="both") ? true : false;

//arcs = true; //set to true if you want round shapes in the corner not recommended if building shelf with doors - using hinges, or with drawers

hinges = (addons=="hinges" || addons=="both") ? true : false;

//hinges = true; // set true if you want hinges for some door

hpos1 = ((hinges_positon=="right_up"||hinges_positon=="both_up"||hinges_positon=="all")&&(number_of_connectors==4 || (number_of_connectors==3 && hinge_axis =="y" )))? true:false; //position of hinge
hpos2 = (hinges_positon=="right_down"||hinges_positon=="both_down"||hinges_positon=="all")? true:false; //position of hinge
hpos3 = ((hinges_positon=="left_up"||hinges_positon=="both_up"||hinges_positon=="all")&&(number_of_connectors==4 || (number_of_connectors==3 && hinge_axis =="y" )))? true:false; //position of hinge
hpos4 = (hinges_positon=="left_down"||hinges_positon=="both_down"||hinges_positon=="all")? true:false; //position of hinge
rotate([-90,0,0])union(){

if(number_of_connectors==4){
  difference(){
cube([thickness_of_desks+(thickness_of_walls*2),width_of_connectors,thickness_of_desks+(thickness_of_walls*2)], center= true);
translate([0,-thickness_of_walls/2,0])cube([thickness_of_desks+2*thickness_of_walls,width_of_connectors-thickness_of_walls,thickness_of_desks+0.2], center= true);
translate([0,-thickness_of_walls/2,0])cube([thickness_of_desks+0.2,width_of_connectors-thickness_of_walls,thickness_of_desks+2*thickness_of_walls], center= true);}
}
else if(number_of_connectors==2){
difference(){
cube([thickness_of_desks+(thickness_of_walls*2),width_of_connectors,thickness_of_desks+(thickness_of_walls*2)], center= true);

translate([-(+thickness_of_walls)/2,-thickness_of_walls/2,0])cube([thickness_of_desks+thickness_of_walls+0.2,width_of_connectors-thickness_of_walls,thickness_of_desks+0.2], center= true);
translate([0,-thickness_of_walls/2,-(+thickness_of_walls)/2])cube([thickness_of_desks+0.2,width_of_connectors-thickness_of_walls,thickness_of_desks+thickness_of_walls+0.2], center= true);

}}
else if(number_of_connectors==3){
difference(){
cube([thickness_of_desks+(thickness_of_walls*2),width_of_connectors,thickness_of_desks+(thickness_of_walls*2)], center= true);
translate([0,-thickness_of_walls/2-0.5,0])cube([thickness_of_desks+0.2,width_of_connectors-thickness_of_walls+1,thickness_of_desks+2*thickness_of_walls+1], center= true);
translate([-thickness_of_desks+1,-thickness_of_walls/2-0.5,0])cube([thickness_of_desks+0.2,width_of_connectors-thickness_of_walls+1,thickness_of_desks+0.2], center= true);

}}
else if(number_of_connectors==1){
difference(){
cube([thickness_of_desks+(thickness_of_walls*2),width_of_connectors,thickness_of_desks+(thickness_of_walls*2)], center= true);
translate([0,-thickness_of_walls/2,0])cube([thickness_of_desks+0.2,width_of_connectors-thickness_of_walls,thickness_of_desks+0.2], center= true);

}}
for( i = [1 : number_of_connectors]){
   rotate([0,i*90,0])connector();
}

if(arcs==true && hinges_positon!="all" ){
    if((hpos1!=true && number_of_connectors ==4 && hinge_axis == "x")||(hpos2!=true && number_of_connectors ==4 && hinge_axis == "y") )
        rotate([0,4*90,0])arc();
    if((hpos2!=true && number_of_connectors >1&&hinge_axis == "x")||(hpos4!=true && number_of_connectors >1&&hinge_axis == "y"))
        rotate([0,1*90,0])arc();
    if((hpos3!=true && number_of_connectors>3&&hinge_axis == "x")||(hpos1!=true && number_of_connectors>3&&hinge_axis == "y"))
        rotate([0,3*90,0])arc();
    if((hpos4!=true && number_of_connectors>2&&hinge_axis == "x")||(hpos3 !=true && number_of_connectors>2 && hinge_axis == "y"))
        rotate([0,2*90,0])arc();
}
if(hinges==true){
rot=hinge_axis=="x"? 90:0;
hrot = hinge_rotation=="up"?0:(-length_of_connectors/4);
if(hpos1==true){
    translate([0,0,0
    ])rotate([0,rot,0])hinges(hrot);
}
if(hpos2==true){
    rotate([0,rot,0])translate([0,0,-thickness_of_desks/2-thickness_of_walls-length_of_connectors+length_of_connectors/4-length_of_connectors-thickness_of_desks/2-thickness_of_walls
    ])hinges(hrot);
}
if(hpos3==true){
    translate([0,-thickness_of_desks+width_of_connectors,0])rotate([0,-rot,180])hinges(hrot);
}
if(hpos4==true){
    rotate([0,-rot,180])translate([0,thickness_of_desks-width_of_connectors,-thickness_of_desks/2-thickness_of_walls-length_of_connectors+length_of_connectors/4-length_of_connectors-thickness_of_desks/2-thickness_of_walls])hinges(hrot);
}
}
}
module connector(){
    translate([(thickness_of_desks+(thickness_of_walls*2))/2,-width_of_connectors/2,-(thickness_of_desks+(thickness_of_walls*2))/2])difference(){
cube([length_of_connectors,width_of_connectors,thickness_of_desks+(thickness_of_walls*2)]);
translate([-0.5,-thickness_of_walls,thickness_of_walls-0.1])cube([length_of_connectors+0.5+1,width_of_connectors,thickness_of_desks+0.2]);
translate([length_of_connectors/2,width_of_connectors/2,-1])cylinder(h=thickness_of_desks+(thickness_of_walls*2+2), d=secure_filament_thickness );
}
}

module arc(){
translate([(0.1+(length_of_connectors/2)-secure_filament_thickness)+thickness_of_desks/2,width_of_connectors/2,-((0.1+(length_of_connectors/2)-secure_filament_thickness)+thickness_of_desks/2)])rotate([90,270,0])difference(){
intersection(){
union(){
cylinder(h=width_of_connectors, r = (length_of_connectors/2)-secure_filament_thickness);
cube([(length_of_connectors/2)-secure_filament_thickness,(length_of_connectors/2)-secure_filament_thickness,thickness_of_walls]);
}
cube([(length_of_connectors/2)-secure_filament_thickness,(length_of_connectors/2)-secure_filament_thickness,width_of_connectors]);
}
translate([0,0,-1])cylinder(h=width_of_connectors+2, r = (length_of_connectors/2)-(secure_filament_thickness+thickness_of_walls-0.1));
}
}
module hinges(rotation){
translate([thickness_of_desks/2+thickness_of_walls,width_of_connectors/2-thickness_of_desks,thickness_of_desks/2+thickness_of_walls+length_of_connectors-length_of_connectors/4
    ])
union(){

translate([thickness_of_desks/2+thickness_of_walls,(thickness_of_desks-0.05)/2,rotation])
        cylinder(h=length_of_connectors/2, d=thickness_of_desks-0.05);

translate([0,0,0])cube([thickness_of_desks/2+thickness_of_walls,thickness_of_desks,length_of_connectors/4]);
}

}

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


[User]
I'd like to design a coil former, something you can wind wire around to make a coil, and I'd like it to be parametric so I can adjust the dimensions easily.

Specifically, I need:

*   **A cylindrical core:** This will be the base of the coil former, and I need to be able to set the diameter and length.
*   **A helical groove:** This groove will guide the wire as it's wound around the core. I need to be able to specify the number of turns, the width of the groove, and a sort of "elasticity" factor. This elasticity factor will basically scale the turns slightly to ensure a constant pitch. The elasticity factor will be a scale multiplier, so 1 is normal, and say 1.2 would create some extra spacing.
*   **A "segment" parameter:** The groove needs to be generated as linear extrudes, using the hull function, and I want to be able to specify the number of segments per turn in the helix. This will allow me to control the resolution of the groove's shape.
*   **I'd prefer to avoid unnecessary dependencies**, but if libraries are necessary, using BOSL2 seems to be the most logical choice.

Could you generate a parametric OpenSCAD file (or files if necessary) for this? I'd like to be able to adjust all of those parameters I've specified.

[Assistant]
coilbody.scad:
```
// Diameter
D=10;
// length of coil
h=15;
// number of windings
n=3;
// width of indent for wire
wirewidth=1.5;
// elasticity measure for winding
elastic=0.2;
// number of spiral Segments per rotation
segs=32;

/* [Hidden] */

D_el=D/(1+elastic);
n_el=n*(1+elastic);

$fn=32;

alpha=atan(h/(n_el*PI*D_el));

difference() {

    cylinder(d=D_el, h=h);

    for(i = [1:(n_el*segs)-1])
    {
        hull(){
            rotate(360*(i/segs)) translate([D_el/2,0,h*(i/(n_el*segs))]) rotate([90+alpha,0,0])linear_extrude(.01)circle(d=wirewidth);
            rotate(360*((i+1)/segs)) translate([D_el/2,0,h*((i+1)/(n_el*segs))]) rotate([90+alpha,0,0])linear_extrude(.01)circle(d=wirewidth);
        }

    }
}
```


[User]
Hey, I'm looking to create a customizable ring design in OpenSCAD. I want to be able to specify the text that's embossed on it, the ring size, the size of the letters, and the overall thickness and width of the ring.

Here's what I have in mind:

1.  **Base Ring:** A simple cylindrical ring. I need to control its inner diameter, the ring's thickness, and its width.
2.  **Embossed Text:** The text should be embossed on the ring, sort of like a 3D label. The text, its size (both letter size and extrusion height), and the font should be customizable.
3.  **Text Integration:** The text should be incorporated into the ring itself and use a hull to make it into a solid, and not float.
4. **Multiple Rings:** The design should include multiple instances of the ring. I'd like to specify the spacing of these rings. I also want the center ring to have the embossed text, but not the additional rings.
5.  **Parameters:** I want to be able to control all the major dimensions through variables:
    *   `text`: The string to be embossed.
    *   `ring_size`: The inner diameter of the ring.
    *   `letter_size`: The size of the font for the embossed text.
    *  `font`: The font name.
    *   `ring_thickness`: The thickness of the ring walls.
    *   `ring_width`: The height of the ring.
    *   `letter_height`: The height of the extruded text.
    *   `ring_count`: The number of rings in total to render.

Can you generate an OpenSCAD file (or files if needed) to achieve this? Also, could you make sure the text is centered along the ring, and use reasonable defaults? I'm not sure if you need any special libraries but I'm not opposed to using some. Oh, and could you do an initial render to show me how it looks with `text = "BOSS"`, a `ring_size` of 22, and a `ring_count` of 3? Thanks!

[Assistant]
BossRing.scad:
```
echo(version=version());

text="BOSS";
ring_size=22;
letter_size = 25;
font="Times New Roman";
ring_thickness=3;
ring_width=6;
letter_height = 5;

module ring()
{
    difference()
    {
        cylinder(d=ring_size+ring_thickness*2, h=ring_width);
        translate([0,0,-.05])
        cylinder(d=ring_size, h=ring_width+.1);
    }
}

$fn=256;

module letter(l) {
  translate([0,0,-letter_height / 2])
  {
    linear_extrude(height = letter_height, convexity = 10) {

        text(l, size = letter_size, font = font, halign = "center", valign = "center", spacing=1);
    }
  }
}

module BossRing()
{
    translate([0,0,letter_height/2-.2])
    letter(text);

    intersection()
    {
        translate([0,0,-letter_height])
        hull()
        {
            translate([0,0,letter_height/2])
            letter(text);
        }

        translate([0,0,-ring_thickness/2])
        scale([10000,ring_width,ring_thickness])
        cube(1, center=true);
    }

    ring_outer_size=(ring_size+ring_thickness+.1);
    translate([-1*ring_outer_size,0,/*-ring_thickness*/0])
    translate([0,ring_width/2,-ring_size/2-ring_thickness])
    for(i=[0:1:2])
        translate([i*ring_outer_size,0,0])
        rotate([90,90,0])
        ring();
}

rotate([180,0,0])
BossRing();
```


[User]
I'm looking to design a customizable stand-alone spool holder for 3D printer filament. I'd like to be able to specify the spool width, and have the design adjust accordingly. The design should consist of a main "connection stick" that supports the spool, with cutouts for mounting or attaching.

The basic shape of the connection stick is a rounded rectangle. The length of the rectangle is driven by the spool width, plus a little extra (about 25mm). The width of the rectangle should be 15mm and the height should be 9mm. The corners should be rounded with a radius of 5mm. I'd like the rounded rectangle to be generated using the `hull()` function and `circle()` to create the rounded corners, with a linear extrusion to add the height.

Then, I need some cutouts for mounting. These should be rectangular, 3.5mm wide, 10mm deep, and 20mm high. There should be two cutouts on each side of the center of the stick, each spaced 6.75mm and 10.25mm, respectively, from the edge of the spool (so the total distance from the center of the stick will depend on the spool width). The cutouts are placed both above and below the center line, so two cutouts should be placed at an offset of 5mm and the other two at an offset of -15mm from the center line in the width axis.

Could you generate the necessary OpenSCAD files to do this? I’d like the code to use variables so that the spool width can be easily modified. Please make sure to use the `$fn` variable to control the resolution of curves. I don't need any complex libraries, just the standard OpenSCAD library.

[Assistant]
StandAloneSpoolHolder_ConnectionStick.scad:
```
//
//
//  Connection Stick for Standalone Spool Holder by TouchWARE
//
//  Copyright (C) 2016 TouchWARE, Jan Verner
//
//

spoolwidth=95;         // Enter Spool Width Here (in mm)

module roundedRect(size, radius)
{
        // this function is from Round corners for Openscad - Tutorial by WilliamAAdams
        // http://www.thingiverse.com/thing:9347

	x = size[0];
	y = size[1];
	z = size[2];

	linear_extrude(height=z)
	hull()
	{
		translate([(-x/2)+(radius/2), (-y/2)+(radius/2), 0])
		circle(r=radius);

		translate([(x/2)-(radius/2), (-y/2)+(radius/2), 0])
		circle(r=radius);

		translate([(-x/2)+(radius/2), (y/2)-(radius/2), 0])
		circle(r=radius);

		translate([(x/2)-(radius/2), (y/2)-(radius/2), 0])
		circle(r=radius);
	}
}

difference()
{
  roundedRect([spoolwidth+25,15,9],5,$fn=200);
  union()
  {
    translate([spoolwidth/2+6.75,5,-5]) cube([3.5,10,20]);
    translate([spoolwidth/2+6.75,-15,-5]) cube([3.5,10,20]);
    translate([-spoolwidth/2-10.25,5,-5]) cube([3.5,10,20]);
    translate([-spoolwidth/2-10.25,-15,-5]) cube([3.5,10,20]);
  }

}
```


[User]
I'm looking to create a customizable cable holder, and I've got a basic idea in mind. I'd like a design that's essentially a base with an angled arm extending from it. This arm should have a gap in it, allowing a cable to be inserted.

Here are the parameters I'd like to control:

*   **base:** The size of the square base.
*   **gap:** The size of the opening in the arm for the cable. This needs to be smaller than the base size.
*   **thickness:** The thickness of all the parts of the holder.
*   **armLength:** The length of the straight section of the arm extending from the base.
*   **armAngle:** The angle of the bend in the arm, relative to the base.
*   **armBent:** The length of the angled section of the arm after the bend.

I imagine the holder being created by combining a cube for the base, and two other cubes for the arm, one straight and one angled. A final cube is used to create a space for the cable. I'd like it to be fully parametric.

Could you help me generate an OpenSCAD file for this? I'm not familiar with libraries, so you don't need to use any, I'm happy with base OpenSCAD operations.

[Assistant]
cable_holder.scad:
```

// Size of base
base = 16; //[10:200]

// Size of gap for cable to pass through (Must be less than the base!)
gap = 6; //[195]

// Thickness of all parts, higher values are stronger but take longer
thickness = 2; //[1:6]

// Length of straight part of the cable holder
armLength = 8; //[2:40]

// Angle of arngled portion of the cable holder
armAngle = 45; //[45]

// Length of cable holder after the bend
armBent = 6; //[20]

difference(){
union(){
cube([base,base,thickness]);

/*
difference(){
union(){
union(){
cube([(base/2)-(gap/2),2,10]);
translate([(base/2)+(gap/2),0,0])
cube([(base/2)-(gap/2),2,10]);
}
translate([0,0,10])
rotate([-45,0,0])
union(){
cube([(base/2)-(gap/2),2,8]);
translate([(base/2)+(gap/2),0,0])
cube([(base/2)-(gap/2),2,8]);
}
}
translate([-base*2,-10,0])
cube([(base*4),10,80]);
}*/

difference(){
union(){
cube([base,thickness,armLength+thickness]);

translate([0,0,armLength+thickness])
rotate([-armAngle,0,0])
cube([base,thickness,armBent]);
}

translate([-base*2,-10,0])
cube([(base*4),10,80]);

translate([base/2-gap/2,-1,thickness])
cube([gap,base*(armBent+armLength)*2,armLength+armBent+1]);
}

}
translate([-1,-1,-1])
cube([base*2,base*2,1]);
}
```


[User]
Hey, I need a spool adapter for 3D printer filament, and I've got a basic idea but I'd like it to be parametric so I can easily adjust the sizes.

Basically, it's a cylinder with three curved arms that grip the spool. Imagine three equally spaced 'L' shapes rotated around the center cylinder. I want it to be printable easily.

Here's the idea:

1.  **Center Cylinder:** This needs to have adjustable inner and outer diameters, as well as depth. This would sit on the rod of my spool holder, and the spool sits on this.

2.  **Arms (or L-shapes):** Three of them, equally spaced, each extending outward from the central cylinder. They need to be curved, like a segment of a circle on the outside. I'd also like to be able to adjust the length of these arms, the wall thickness, and the radius of the curve.

3.  **Locking Pins:** To keep the spool in place, I need three pins. I'd like to be able to control their location, size, and shape - I'm thinking simple cylinders that stick out from the main body, maybe about halfway down the height of the central cylinder, and at around the middle of the arms. These will act as a slight barrier to keep the spool from sliding on the arms.

I need to be able to adjust the:
    * Inner diameter of the central cylinder.
    * Outer diameter of the central cylinder.
    * Depth (height) of the entire object.
    * Length of the arms.
    * Wall thickness of the entire structure, which should apply both to the center cylinder and the arms.
    * Radius of the curved section of the arms.
    * Diameter of the locking pins.
    * Height of the locking pins.
    * Angle/location of the locking pins relative to the arms, as well as location along the Z-axis.

The whole thing should be printable without supports, so I'd be interested in any design considerations for that. I'm aiming for something that provides a tight fit to my spools and is strong enough to be useful, but I do not need it to be as structurally strong as possible.

I think that's everything. Can you generate a parametric OpenSCAD design for me? Also, could you include comments in the code, so I can understand it?

[Assistant]
FilamentAdapter.scad:
```
$fn = 150;

inner = 9;
outer = 74;
wall = 2;
deep = 20;

module luk() {
    wsp = 0.6;
    translate([0,outer*wsp/2])
    difference() {
        cylinder(deep, d=outer*wsp);
        translate([0,0,-0.1])
        cylinder(deep+0.2, d=outer*wsp-2*wall);
        translate([-2*outer, -outer, -0.1])
        cube([2*outer, 2*outer, deep+0.2]);
    }
}

module podstawa() {
    luk();
    rotate([0,0,120]) luk();
    rotate([0,0,240]) luk();
    cylinder(deep, d=inner+2*wall);
}

module blokada(kat) {
    rotate([0,0,kat])
    translate([outer/2,0,0])
    cylinder(3, d=10);
}

module srodek() {
    difference() {
        podstawa();
        translate([0,0,-0.1])
        cylinder(deep+0.2, d=inner);
    }
}

intersection() {
    srodek();
    cylinder(deep, d=outer);
}
blokada(60);
blokada(180);
blokada(300);
```


[User]
Okay, I've been playing around with this Customizer thing on Thingiverse, and it's pretty cool, but it feels a bit clunky to have to adjust all those parameters in that panel every time. I'm hoping you can help me design something similar, but with a more flexible setup.

Basically, I want to create a set of parametric OpenSCAD files to make a base with multiple columns, each with optional holes. I'd like the design to be modular, so I can easily reuse the base and column parts in other projects.

Here's what I'm thinking:

*   **Base Module:** I need a module to create a rectangular base. I want to specify the width, depth, and thickness of the base. Also, I'd like the option to add mounting holes on each side, with a diameter that I can set. The holes should be centered on each edge of the base. I am not requesting rounded edges.

*   **Column Module:** This module will create the columns. I need to define the column shape as a regular polygon, specifying the number of sides. I'll also need to define the circumscribing circle diameter to control the column size. It should have parameters for its X and Y position (relative to the base's front left corner), its height above the base, and a twist angle (in degrees).

*   **Hole Module:** This module will create a hole within a column. I need to specify the hole's shape as a regular polygon, again with a number of sides and a circumscribing circle diameter. The hole will also need an X and Y position, a Z height measured from the top of the base, and a depth. The Z height will be the *top* of the hole - meaning the hole will be "cut down" into the column.  It will be a linear extrusion, so it may have a twist, like the column itself.

*   **Assembly Module:** Finally, I'd like an assembly module that brings all these pieces together. I'd like to be able to define the overall base and then use a loop (or a similar method) to specify a list of column parameters and a list of hole parameters. This way I won't have to copy/paste the module call for each column.
* **File structure:** I'd like to have three files: base.scad, column.scad, and main.scad.

For the parameters, I'd like to be able to define:
    *   Base width (BX)
    *   Base depth (BY)
    *   Base thickness (BZ)
    *   Mounting hole diameter (BHDia)
    *   Column Diameter (CD)
    *   Column Sides (CS)
    *   Column X Location (CX)
    *   Column Y Location (CY)
    *   Column Height (CZ)
    *   Column Twist (CT)
    *   Hole Diameter (HDia)
    *   Hole Sides (HS)
    *   Hole X Location (HX)
    *   Hole Y Location (HY)
    *   Hole Height, as measured from the top of the base (HZ)
    *   Hole Depth (HDpth)
    *   Hole Twist (HT)

I want the base module to be in base.scad, the column and hole modules to be in column.scad, and the main.scad file should assemble everything, pulling in the other two files via `use` statements.

I'm not asking for any library usage for this project at this time. Can you put together that set of files for me?

[Assistant]
Polygon_Columns_with_Holes_and_a_Twist.scad:
```
// Start Data Input

/* [Overview and Base] */
// Base Width (side to side). All distances are in mm.
BX = 150;
// Base Depth (front to back)
BY = 100;
// Base Thickness Use 0 thickness for no base
BZ  = 8;
// Mounting hole diameter, mounting holes are located in the center of each edge of the base. Use 0 for no holes
BHDia = 2;

/* [Column 1] */
// Column 1 Diameter [diameter of the circle within which the column 1 polygon is inscribed] Use 0 for no Column 1.
C1D = 40;
// Column 1 Sides. (The number of sides for the Column 1 cross-section polygon.  3 sides make a triangle, 4 sides make a square, 5 sides make a pentagon, … Use a large number (e.g. 60 or 100) to make a polygon with so many sides that it appears to be circular when printed. Gotcha: objects with many sides may take a long time to be rendered as an object.
C1S =5;
// X coordinate for the center of column 1. The 0, 0, 0 origin for the coordinate system is the front left corner of the top of the base plate.
C1X = 23;
// Y coordinate for the center of column 1
C1Y = 32;
// Column 1 height above top of base.
C1Z = 25;
// Column 1 twist. Measured in degrees. e.g. 360 is one complete counter clockwise twist, 180 is a half twist, etc. Use negative degrees (e.g. -180) for clockwise twist. Use 0 for no twist
C1T = 180;
//Diameter of the circle within which the column 1 hole polygon is inscribed. Use 0 for no hole.
C1HDia = 30;
//Number of sides for the hole.
C1HS = 4;
// Depth of the Column 1 hole, measured down from the top of the column.
C1HDpth = 20;

/* [Column 2] */
// See Column 1 tab for explanation of the column parameters
C2D = 80;
C2S = 8;
C2X = 105;
C2Y = 50;
C2Z = 10;
C2T = 52;
C2HDia = 0;
C2HS = 60;
C2HDpth = 0;

/* [Column 3] */
// See Column 1 tab for explanation of the column parameters
C3D = 25;
C3S = 7;
C3X = 95;
C3Y = 30;
C3Z = 35;
C3T = -180;
C3HDia = 18;
C3HS = 60;
C3HDpth = 40;

/* [Column 4] */
// See Column 1 tab for explanation of the column parameters
C4D = 25;
C4S = 7;
C4X = 125;
C4Y = 40;
C4Z = 35;
C4T = 180;
C4HDia = 18;
C4HS = 60;
C4HDpth = 40;

/* [Column 5] */
// See Column 1 tab for explanation of the column parameters
C5D = 35;
C5S = 5;
C5X = 20;
C5Y = 68;
C5Z = 40;
C5T = 60;
C5HDia = 20;
C5HS = 5;
C5HDpth = 45;

/* [Column 6] */
// See Column 1 tab for explanation of the column parameters
C6D = 25;
C6S = 4;
C6X = 53;
C6Y = 68;
C6Z = 40;
C6T = 0;
C6HDia = 18;
C6HS = 60;
C6HDpth = 45;

/* [Column 7] */
// See Column 1 tab for explanation of the column parameters
C7D = 25;
C7S = 60;
C7X = 82;
C7Y = 72;
C7Z = 40;
C7T = 0;
C7HDia = 18;
C7HS = 60;
C7HDpth = 10;

/* [Column 8] */
// See Column 1 tab for explanation of the column parameters
C8D = 30;
C8S = 4;
C8X = 120;
C8Y = 70;
C8Z = 40;
C8T = 0;
C8HDia = 18;
C8HS = 60;
C8HDpth = 30;

/* [Column 9] */
// See Column 1 tab for explanation of the column parameters
C9D = 0;
C9S = 3;
C9X = 40;
C9Y = 20;
C9Z = 20;
C9T = 0;
C9HDia = 0;
C9HS = 6;
C9HDpth = 20;

/* [Column 10] */
// See Column 1 tab for explanation of the column parameters
C10D = 0;
C10S = 3;
C10X = 40;
C10Y = 20;
C10Z = 20;
C10T = 0;
C10HDia = 0;
C10HS = 6;
C10HDpth = 20;

// -- End data input

// -- Start Modules

//Base Builder Module builds the base and subtracts the mounting holes.

module base(X,Y,Z,BHD)
    {
        difference(){
    cube([X,Y,Z]);
           translate([BHD, Y/2, 0])
            cylinder (h = Z, r = BHD/2, center = false, $fn=100);
        translate([X-BHD, Y/2, 0])
            cylinder (h = Z, r = BHD/2, center = false, $fn=100);
        translate([X/2, BHD, 0])
            cylinder (h = Z, r = BHD/2, center = false, $fn=100);
        translate([X/2, Y- BHD, 0])
            cylinder (h = Z, r = BHD/2, center = false, $fn=100);
        }
    }

//Column Builder Module

module column(CD, CS, CX, CY, CZ, CT)
    {
        translate([CX, CY, 0])
        linear_extrude(height = CZ + BZ, center = false, twist = CT)
        circle(r=CD/2, $fn=CS);
    }
//Hole Builder Module

    module hole(HDia, HS, HX, HY, HZ, HDpth, HT)
        {
        translate([HX, HY, ((HZ + BZ) - HDpth)])
            linear_extrude(height = HDpth, center = false, twist = HT)
            circle(r=HDia/2, $fn=HS);
        }
// --- End Modules

// (Finally!) Construct the object
//        by combining the base and the columns, and then subtracting the column holes.

difference()
    // subtract the holes from the joined columns and base
{

union()
    // join the base and the columns

    {
    // build the base
        base(BX,BY,BZ,BHDia);

    // build the columns
        column(C1D,C1S,C1X,C1Y,C1Z,C1T);
        column(C2D,C2S,C2X,C2Y,C2Z,C2T);
        column(C3D,C3S,C3X,C3Y,C3Z,C3T);
        column(C4D,C4S,C4X,C4Y,C4Z,C4T);
        column(C5D,C5S,C5X,C5Y,C5Z,C5T);
        column(C6D,C6S,C6X,C6Y,C6Z,C6T);
        column(C7D,C7S,C7X,C7Y,C7Z,C7T);
        column(C8D,C8S,C8X,C8Y,C8Z,C8T);
        column(C9D,C9S,C9X,C9Y,C9Z,C9T);
        column(C10D,C10S,C10X,C10Y,C10Z,C10T);
}
union()
    //build and join the holes
    {
        hole(C1HDia, C1HS, C1X, C1Y, C1Z, C1HDpth, 0);
        hole(C2HDia, C2HS, C2X, C2Y, C2Z, C2HDpth, 0);
        hole(C3HDia, C3HS, C3X, C3Y, C3Z, C3HDpth, 0);
        hole(C4HDia, C4HS, C4X, C4Y, C4Z, C4HDpth, 0);
        hole(C5HDia, C5HS, C5X, C5Y, C5Z, C5HDpth, 0);
        hole(C6HDia, C6HS, C6X, C6Y, C6Z, C6HDpth, 0);
        hole(C7HDia, C7HS, C7X, C7Y, C7Z, C7HDpth, 0);
        hole(C8HDia, C8HS, C8X, C8Y, C8Z, C8HDpth, 0);
        hole(C9HDia, C9HS, C9X, C9Y, C9Z, C9HDpth, 0);
        hole(C10HDia, C10HS, C10X, C10Y, C10Z, C10HDpth, 0);
    }
}

```


[User]
I need an OpenSCAD file (or files) that can generate L and T brackets for aluminum extrusions. I'd like to be able to customize a few things:

1.  **Extrusion Width:** I need to specify the width of the extrusion that the bracket is designed for.
2.  **Channel Width:** My extrusions sometimes have channels and I'd like to have guide bars on the bracket for those. I need to be able to specify the width of this channel. If I set this to zero, I want no guide bars. The guide bars should be trapezoidal, not rectangular, with a slight slope on the sides.
3. **Number of holes:** I need to specify the number of mounting holes on each leg of the L bracket independently.
4.  **Hole Radius:** I need to set the radius of the mounting holes. Also, it would be nice to have a chamfer on the top and bottom of each hole to make sure screws don't bind, as seen in the provided SCAD.
5.  **Bracket Type:** I need an option to generate either an L bracket *or* a T bracket. The T bracket can simply be made by mirroring a second L bracket and translating it.
6.  **Bracket Thickness:** I need to be able to specify the thickness of the solid part of the bracket.
7. **Corner Radius**: I need a way to specify a rounding for the outside corners of the bracket. The default value for this should be 20% of the extrusion width, but it should be adjustable between 0 and 50% of the extrusion width.

The bracket should be designed to be easily 3D-printable. I don't want any steep overhangs or bridges in the default printing orientation. I think the default printing orientation should have the legs of the L or T bracket flat on the print bed.

I think I'd like the hole chamfers to be conical, with the top and bottom of the cone each being the hole's radius, with the widest part of the cone being 150% of the hole's radius, and with each cone being about 75% the depth of the channel. If the channel is disabled, the chamfers should be about 1.5mm deep.

I'd really prefer this as a single SCAD file with all the relevant parameters at the top, but if you think it is better to have separate SCAD files for the bracket and for helper functions I am open to that.

Also, please don't use any external libraries for this, I'm trying to keep it as simple as possible.

[Assistant]
Parmetric_Extrusion_L_T_Bracket.scad:
```
// Width of extrusion beams
customizer_extrusion_w = 20;
// Width of channel in extrusion. Set to 0 to disable guides.
customizer_channel_w = 5;
// Number of holes of the base (the side with the guides the full length)
customizer_base_holes = 2;
// Number of holes of the riser (the side with partial length guides)
customizer_riser_holes = 2;
// Radius of mounting holes
customizer_hole_r = 2.25;
// Enable T bracket mode
customizer_t_bracket = 0; // [0,1]
// Thickness of the solid section of the bracket
thickness = 3;

module trapezoid(width_base, width_top,height,thickness) {

  linear_extrude(height = thickness) polygon(points=[[0,0],[width_base,0],[width_base-(width_base-width_top)/2,height],[(width_base-width_top)/2,height]], paths=[[0,1,2,3]]);

}

// extrusion_w: Wide of extrusion pieces
// channel_w: Width of the extrusion's channel (guide will slope from this size to 80% of this size and be 40% of this size tall)
// base_holes: Number of mounting holes on the base (the side where the channel goes the entire length of the side)
// riser_holes: Number of mounting holes on the riser
// hole_r: Size of mounting holes
// corner_r: Corner rounding. Defaults to 25% extrusion width. 0 < corner_r <= 0.5 * extrusion_width
module l_bracket(extrusion_w, channel_w, base_holes, riser_holes, hole_r, corner_r = 0) {
    side_slope = 1.5;
    corner_r = corner_r <= 0 ? 0.2 * extrusion_w : corner_r > extrusion_w / 2 ? extrusion_w / 2 : corner_r;
    difference() {
        union() {
            hull() {
                perim_r1 = max(corner_r - side_slope, 0);
                // Origin corner
                translate([corner_r, corner_r, 0]) cylinder(r1=perim_r1, r2=corner_r, h=thickness, $fn=16);
                // Bottom right corner
                translate([(extrusion_w * base_holes) - corner_r, corner_r, 0]) cylinder(r1=perim_r1, r2=corner_r, h=thickness, $fn=16);
                // Top of base
                translate([(extrusion_w * base_holes) - corner_r, extrusion_w - corner_r, 0]) cylinder(r1=perim_r1, r2=corner_r, h=thickness, $fn=16);
                // Side of riser
                translate([corner_r, (extrusion_w * riser_holes) - corner_r + extrusion_w, 0]) cylinder(r1=perim_r1, r2=corner_r, h=thickness, $fn=16);
                // Top left corner
                translate([extrusion_w - corner_r, (extrusion_w * riser_holes) - corner_r + extrusion_w, 0]) cylinder(r1=perim_r1, r2=corner_r, h=thickness, $fn=16);
            }

            if (channel_w > 0)
            {
                translate([1, extrusion_w / 2 - channel_w / 2, thickness]) rotate([90, 0, 90]) trapezoid(channel_w, channel_w * 0.8, channel_w * 0.4, extrusion_w * base_holes - 2);
                translate([extrusion_w * 0.5 + channel_w * 0.5, extrusion_w * 1.1, thickness]) rotate([0, 90, 0]) rotate([0, 90, 90]) trapezoid(channel_w, channel_w * 0.8, channel_w * 0.4, extrusion_w * riser_holes - (extrusion_w * 0.1) - 1);
            }
        }
        for(i=[extrusion_w * 1.5:extrusion_w:extrusion_w * (0.5 + riser_holes)]) {
            translate([extrusion_w / 2, i, -1]) cylinder(r=hole_r, h=thickness + channel_w + 2, $fn=16);
            translate([extrusion_w / 2, i, thickness]) cylinder(r1=hole_r, r2 = hole_r * 1.5, h=channel_w * 0.5, $fn=16);
            translate([extrusion_w / 2, i, -1]) cylinder(r1=hole_r * 1.5, r2 = hole_r, h=1.5, $fn=16);
        }
        for(i=[extrusion_w/2:extrusion_w:extrusion_w * (0.5 + base_holes)]) {
            translate([i, extrusion_w / 2, -1]) cylinder(r=hole_r, h=thickness + channel_w + 2, $fn=16);
            translate([i, extrusion_w / 2, thickness]) cylinder(r1=hole_r, r2 = hole_r * 1.5, h=channel_w * 0.5, $fn=16);
            translate([i, extrusion_w / 2, -1]) cylinder(r1=hole_r * 1.5, r2 = hole_r, h=1.5, $fn=16);
        }

    }
}

// Cheap and dirty T bracket by mirroring and overlaying a pair of L brackets :)
module t_bracket(extrusion_w, channel_w, base_holes, riser_holes, hole_r, corner_r = 0) {
    l_bracket(extrusion_w, channel_w, base_holes, riser_holes, hole_r, corner_r);
    translate([extrusion_w, 0, 0]) mirror([1, 0, 0]) l_bracket(extrusion_w, channel_w, base_holes, riser_holes, hole_r, corner_r);
}

if (customizer_t_bracket > 0)
    t_bracket(customizer_extrusion_w, customizer_channel_w, customizer_base_holes, customizer_riser_holes, customizer_hole_r);
else
    l_bracket(customizer_extrusion_w, customizer_channel_w, customizer_base_holes, customizer_riser_holes, customizer_hole_r);
```


[User]
I'd like to design a customizable spool for winding wire or thread, and I need an OpenSCAD file to generate it. The spool design should be based on the circumference, rather than the radius, so I can easily calculate how much material it holds.

Here are the parameters I'd like to be able to control:

*   **Inner Circumference:** The circumference of the main body of the spool, before the groove is cut in.
*   **Pitch:** The vertical distance between each turn of the groove.
*   **Groove Depth:** The depth of the groove.
*   **Height:** The overall height of the spool.
*   **Smoothness:** The number of facets used to render the cylinder (this impacts how smooth the curves look).
*   **End Height:** The vertical height of the end caps that extend past the main cylinder.
*   **End Depth:** The radial depth of the end caps that extend past the main cylinder.
*   **Wall Thickness:** The thickness of the spool walls.
*   **Axis Diameter:** The diameter of the center hole of the spool.
*   **Number of Internal Supports:** The number of internal support structures that connect the inner cylinder to the outer wall.
*   **Thread Direction:** Should allow for left-hand and right-hand threads (1 or -1 for direction).

The design should work like this:

1.  The main body of the spool is a cylinder.
2.  A helical groove is cut into the cylinder's outer surface. The profile of this groove should be rectangular.
3.  End caps can be added at the top and bottom.
4.  A center hole is cut through the spool.
5.  Internal support structures are added as radial straps connecting the central hole to the spool wall, evenly distributed along the vertical axis. These should be cut as cubes.

I also need a small hole through the outer wall to allow the end of the thread or wire to pass through. It should start at the same height as the end cap, and exit in the first grove below it. This hole should be perpendicular to the thread, and should be a cylinder.

Can you generate this for me? I don't need any external libraries; just the core OpenSCAD functionality.

[Assistant]
spool.scad:
```
// lib
function r2d(a) = 180 * a / PI;

// inner circumference
Circumference = 200; // [0.1:0.1:1000]

// distance between grooves
Pitch = 5; // [0.1:0.1:20]

// groove depth
Groove_Depth = 4; // [0.1:0.1:1000]

// height
Height = 100; // [0.1:0.1:1000]

// smoothness (facets)
Smoothness = 72;// [3:1:144]

// end cap vertical height from ends
End_Height = 7; // [0:0.1:500]

// end cap deph from the main radius
End_Depth = 3; // [0:0.1:500]

Wall_Thickness = 3; // [0.1:0.1:500]

//
Axis_Diameter = 5;// [0:0.1:50]

// number of internal supports
Num_Supports = 2;//[0:1:100]

Support_Count = Num_Supports - 1;

Thread_Direction = 1; // [-1,1]

// calculated values
Adj_Circumference = Circumference + Groove_Depth;
Radius = Adj_Circumference / (PI * 2);
Hole_Radius = Radius - Wall_Thickness - Groove_Depth;
Segment_Angle = 90-atan2(Pitch, Adj_Circumference);
Segment_Length = (Adj_Circumference / Smoothness);
Turns = Height / Pitch;

// make threads
difference(){
    // main body
    union(){
        difference(){
            // rotate so main cylinder facets will be in-line with groove segments
            rotate([0,0,360/Smoothness/2]) cylinder(Height, Radius, Radius, $fn = Smoothness);
            // channel
            union(){
                for (i = [0:Turns * Smoothness]){
                    Segment(i);
                }
            }
        }
        // end caps
        if (End_Height > 0 && End_Depth > 0){
            cylinder(End_Height, Radius + End_Depth , Radius + End_Depth );
            translate([0,0,Height - End_Height]) cylinder(End_Height, Radius + End_Depth , Radius + End_Depth );
            }
        }

    // center hole
    translate([0,0,-1]){
        cylinder(Height + 2, Hole_Radius,Hole_Radius);
    }

    // cable_hole
    cable_hole_height = End_Height + Groove_Depth/2;
    segment_index = (cable_hole_height / Pitch) * Smoothness;
    segment_angle = (Thread_Direction * -segment_index * 360/Smoothness) + 90;
    translate([0,0,cable_hole_height]){
        rotate([90,0,segment_angle]){
            cylinder(Radius, Groove_Depth/2, Groove_Depth/2, $fn = 10);
        }
    }
}

// make inner structure
Support_Dist = (Height - Wall_Thickness) / Support_Count;
difference(){
    union(){
        for (i = [0:Support_Count]){
            translate([0,0,i * Support_Dist]) SupportStrap(i);
        }
    }

    translate([0,0,-1]) cylinder(Height + 2, Axis_Diameter / 2, Axis_Diameter / 2);
}

module Segment(index = 0){
    Turn_Index = index / Smoothness;
    rotate([0,0, Thread_Direction * -index * 360/Smoothness]){
        translate([0,0, Turn_Index * Pitch]){
            translate([Radius, 0, 0]){
                rotate([Thread_Direction * Segment_Angle,0, 0]){
                    translate([0,0,-0.5 * Segment_Length]){
                        resize([Groove_Depth, Groove_Depth,Segment_Length]) cylinder(Segment_Length, Groove_Depth, Groove_Depth, $fn = 10);
                    }
                }
            }
        }
    }
}

module SupportStrap(index = 0){
    translate([0,0,Wall_Thickness / 2]) cube([Hole_Radius*2, Axis_Diameter, Wall_Thickness], true);

    rotate([0,0,60]) translate([0,0,Wall_Thickness / 2]) cube([Hole_Radius*2, Axis_Diameter, Wall_Thickness], true);

    rotate([0,0,120]) translate([0,0,Wall_Thickness / 2]) cube([Hole_Radius*2, Axis_Diameter, Wall_Thickness], true);

}
```


[User]
I'm working on a delta 3D printer and need a new effector design. I have one that's working pretty well, but it's kind of a mess of code and could be much better. I'd like to start fresh with a parametric design. I'll also need a fan mount that attaches to the effector.

Here's what I'm looking for in the effector design:

*   **Core Structure:**  It should have a main circular body with a customizable radius.
*   **Arm Mounts:**  There should be three arm mounts equally spaced around the perimeter of the main body. These mounts will connect to the delta arms.
*   **Ball Joint Mounting:** The arm mounts need to have a way to attach ball joints. I need to be able to specify the separation between the mounting faces where the ball joint attaches to.
*   **Hotend Mount:** It needs a central hole for mounting a hotend, with a customizable radius. I'd also like to be able to specify a "lip" or collar around the hotend mount hole.
*   **Mounting Bracket:** I also want a mounting bracket for attaching the hotend. This should be separate from the circular body and attached with screws.
*  **Nut/Bolt Holes:**  I need to have countersunk holes for M3 screws and nuts in the arm mounts and on the mounting bracket. The holes in the bracket should be able to be positioned relative to the hotend hole.
* **Rotation:** The mounting bracket should be able to be rotated around the center axis of the hotend hole.
*   **Parameters:** I'd like to be able to easily adjust these parameters:
    *   `effector_radius`: Radius of the main circular body.
    *   `offset`: Distance from the center of the effector to the arm attachment point, which is also the length of the arm.
    *  `separation`: The distance between the mounting faces of the ball joint attachment points.
    *  `mount_radius`: Radius for hotend mounting screws on the hotend mount bracket.
    *   `hotend_radius`: Radius of the hole for the hotend.
    *   `lip_height`: Height of the lip or collar around the hotend hole.
    *   `height`: Overall height of the effector body.
     * `bracket_rotation_degrees`: The rotation of the hotend bracket around the center axis of the hotend hole.

*   **Libraries:**  I'm not using any external libraries at the moment, but would be open to that if it makes it easier.

I'd like this split into a couple of files. One called `effector.scad` containing the parameterized effector design and another called `fan_mount.scad` for the fan mount, which I'll describe next.

For the fan mount, I'm looking for this functionality:
* **Two Joints:** Two arms should be connected by a pivot joint. One of these joints can be fixed during printing, the other should be able to be attached to the effector with an M3 bolt.
* **Fan Mount:** On the end of the free moving arm, there should be mounting holes for a standard 40mm fan.
* **Effector Attachment:** The base of the mount should attach to the lip of the effector that you designed above.
* **Parameters:** I need to be able to adjust the length of the fan mount's arms and their thickness, plus the radius of the pivot points.
    * `armLength`
    * `armWidth`
    * `pivot_radius`

I'm hoping you can design all of this for me with good parametric design. Thanks!

[Assistant]
parameterized-effector_opposite.scad:
```
// configuration.scad
// Increase this if your slicer or printer make holes too tight.
extra_radius = 0.1;

// OD = outside diameter, corner to corner.
m3_nut_od = 6.1;
m3_nut_radius = m3_nut_od/2 + 0.2 + extra_radius;
m3_washer_radius = 3.5 + extra_radius;

// Major diameter of metric 3mm thread.
m3_major = 2.85;
m3_radius = m3_major/2 + extra_radius;
m3_wide_radius = m3_major/2 + extra_radius + 0.2;

// effector.scad -- modified
separation = 40;  // Distance between ball joint mounting faces.
effector_radius = 30;
top_bracket_radius = 17;
offset = 40;
mount_radius = 12.5;  // Hotend mounting screws, standard would be 25mm.
hotend_radius = 8.1;  // Hole for the hotend (J-Head diameter is 16mm).
push_fit_height = 4;  // Length of brass threaded into printed plastic.
height = 8;
cone_r1 = 2.5;
cone_r2 = 14;
armWidth = 30;
armLength = offset - 4;
lipHeight = 4; // height of the lip for the hotend
nut_indent = 1;
bracket_rotation_degrees = 180;

module effector() {
  difference() {
    union() {
      cylinder(r=effector_radius-3, h=height, center=true, $fn=60);
      for (a = [60:120:359]) rotate([0, 0, a]) {
          rotate([0, 0, 90]) translate([offset*0.5-2, 0, 0]) {
            hull() {
                cube([armLength, armWidth, height - 1], center=true);
                cube([armLength, armWidth - 1, height], center=true);
            }
          }
            //cube([separation, 40, height], center=true);

	//rotate([0, 0, 30]) translate([offset-2, 0, 0])
	//  cube([10, 13, height], center=true);
	for (s = [-1, 1]) scale([s, 1, 1]) {
	  translate([0, offset, 0]) difference() {
	    intersection() {
	      cube([separation, 40, height], center=true);
	      translate([0, -4, 0]) rotate([0, 90, 0])
		cylinder(r=10, h=separation, center=true);
	      translate([separation/2-7, 0, 0]) rotate([0, 90, 0])
		cylinder(r1=cone_r2, r2=cone_r1, h=14, center=true, $fn=24);
	    }
	    rotate([0, 90, 0])
	      cylinder(r=m3_radius, h=separation+1, center=true, $fn=12);
	    rotate([90, 0, 90])
	      cylinder(r=m3_nut_radius, h=separation-24, center=true, $fn=6);
	  }
        }
      }
    }
    translate([0, 0, push_fit_height-height/2])
      cylinder(r=hotend_radius, h=height, $fn=36);
    translate([0, 0, -6]) # import("m5_internal.stl");
    for (a = [0:60:359]) rotate([0, 0, a]) {
      translate([0, mount_radius, 0])
	cylinder(r=m3_wide_radius, h=2*height, center=true, $fn=12);
    }
  }
}

// jojak-effector.scad

difference(){
lip();
lip_remove();
}

original();
top();

//Johanns original effector modifierad
module original() {
rotate([0,0,bracket_rotation_degrees]) {
difference()
{
rotate([0,0,bracket_rotation_degrees - 60]) translate([0,0,-height/2]) effector();		//rotate([0,0,60])  Rotade 60 degrees to allign.
hull() {
translate([0,0,-height/2]) cylinder(height+1,hotend_radius,hotend_radius, center=true, $fn=60);		//Center hole for hotend.
translate([0,hotend_radius/2,-height/2]) cylinder(height+1,hotend_radius,hotend_radius, center=true, $fn=60);		//Center hole #2 to fit hotend.
}
}
difference()		//Removes unused screw holes.
{
translate([0,0,height/-2])cylinder(r=effector_radius-3, h=height, center=true, $fn=60);
hull() {
translate([0,0,-height/2]) cylinder(height+1,hotend_radius,hotend_radius, center=true, $fn=60);		//Center hole for hotend.
translate([0,hotend_radius/2,-height/2]) cylinder(height+1,hotend_radius,hotend_radius, center=true, $fn=60);		//Center hole #2 to fit hotend.
 }
}
}
}

module top() {
rotate([0,0,bracket_rotation_degrees]) {
//Change "hotend_radius+4" to add distance to center
    difference()
    {
    cylinder(40,top_bracket_radius,0, $fn=60);
    translate([-20,-20,height]) cube ([100,100,100]);		//Cut off the top
    translate([-50,0,-2]) cube ([100,100,100]);		//split in half
    translate([0,0,-1]) cylinder(40,hotend_radius,hotend_radius);		//Center for hotend
    translate([-hotend_radius-3,-9,height/2]) rotate([0, 90, 90]) cylinder(r=m3_nut_radius, h=10 + nut_indent, center=true, $fn=6);		//M3 Screw nuts, -hotend_radius-3 give 3mm distance to inner wall
    translate([hotend_radius+3,-9,height/2]) rotate([0, 90, 90]) cylinder(r=m3_nut_radius, h=10 + nut_indent, center=true, $fn=6);		//M3 Screw nuts //M3 Screw nuts, hotend_radius+3 gives 3mm distance to inner wall
    for (a = [0:180:359]) rotate([0, 0, a]) {
          translate([hotend_radius+3, 0, 4])		//M3 Screw hole, hotend_radius+3 & 3 gives 3mm distance to inner wall & 4mm bottom
            rotate([90, 0, 0])
            cylinder(r=m3_wide_radius, h=50, center=true, $fn=12);
        }
    }
    }
}

module lip() {
rotate([0,0,bracket_rotation_degrees]) {
    translate([0,0,-8])cylinder(h = height + lipHeight, r1 = hotend_radius+1 , r2 = hotend_radius+1); // h = 13 gives 3mm to top. radius +1 for manifold error
    }
}

module lip_remove() {
rotate([0,0,bracket_rotation_degrees]) {
    difference() {			//Remove material to create half ring for support during print. Break off after print done
    translate([0,0,-1 * height])cylinder(height - 0.5,hotend_radius+1,hotend_radius+1);
    translate([0,0,-1 * height])cylinder(height + 0.5,hotend_radius-1.1,hotend_radius-1.1);	//-1.2 = ca 0.4mm support.
    }
    difference() {		//Diagnoal to make insertion easier
    translate([0,3,0]) rotate([-20,0,0]) cylinder(height+20,hotend_radius,hotend_radius, center=true, $fn=60);
    translate([-15,-15,-20.5])cube([30,30,20]);
    translate([-10,-24,-.5]) cube ([20,20,10]);		//remove unneeded support
    }

    translate([-10,0,-9]) cube ([20,20,20]);		//split in half
    translate([-10,-4,-10.5]) cube ([20,20,10]);		//remove unneeded support
    translate([0,0,-8])cylinder(16,hotend_radius-1.5,hotend_radius-1.5);		// center
    }
}

```


[User]
Hey! I'm looking to generate some Tafl game sets, and I'd like to use OpenSCAD to make the models. I've got a basic idea of what I want and have seen some previous code for this but I'd like a fully parametric version, so I can tweak everything.

I need a few different board sizes and a couple of different piece styles. I've seen designs that use the rotation extrude to make the pieces and that looks nice, but I'm open to suggestions if there are other options. I want to be able to scale the whole set, and have configurable detail for the curved parts.

Here are the board variants I'm interested in:

*   **Brandubh:** 7x7 board, with a specific layout for the corner, normal, black, white and throne squares.
*   **Ard Ri:** 7x7 board with a different square layout.
*   **Tablut:** 9x9 board, also with a specific layout.
*   **Tawlbwrdd:** 11x11 board, different layout again.
*   **Hnefatafl:** 11x11 board, yet another layout.
*   **Alea Evangelii:** 19x19 board, with its own specific layout.

For the board, I'd like to use a grid of squares, with each type of square having a slightly different height. This would allow for color changes during printing by filament color swaps. I need a way to specify which square type each position has. There should also be a base for the board. Ideally with small gaps between the squares.

For the pieces, I'd like two different styles:

*   **Horik:** This style has a rounded base and a sphere on top.
*   **Forkbeard:** This style has a more angular base with a recessed dome shape on the top.

I need to generate both pawns and kings using these styles, and be able to generate them individually, or in complete sets for any of the different boards (using the correct number of pieces).

I'm thinking it would be good to have a main file that uses modules from other files. The way the pieces should be generated is via a function call from the main file that passes the total number of each piece type needed, their style and the detail level needed, rather than a specific set. This will help if I want to make further Tafl variant boards.

So to sum up:

*   Parametric board generation for the six variants (Brandubh, Ard Ri, Tablut, Tawlbwrdd, Hnefatafl, Alea Evangelii).
*   Two different piece styles (Horik and Forkbeard), for both pawns and kings.
*   Ability to generate individual pieces or complete sets based on the chosen board.
*   Adjustable detail for curved surfaces.
*   Overall scaling capability.
*   Modularity using external modules

I would prefer to use the standard OpenSCAD library if at all possible, and keep external library dependencies to a minimum to ease portability.

Can you help me with this?

[Assistant]
SingleFileTaflGameGenerator.scad:
```
// ------------------------------------------------- ;
//
//         Single File Tafl Game Generator
//
// ------------------------------------------------- ;

// ------------------------------------------------- ;
//         User Configuration Section
// ------------------------------------------------- ;

// Specific set configuration to print. 1 - Brandubh, 2 - Ard Ri, 3 - Tablut, 4 - Tawlbwrdd, 5 - Hnefatafl, 6 - Alea Evangelii.
SetID = 1;

// What to generate. 1 - Board, 2 - Pieces, 3 - Single Pawn, 4 - Single King.
Generate = 1;

// Specific piece style to print. 1 - Horik, 2 - Forkbeard
PieceID = 1;

// Level of detail for smoothing. Low - 90, Medium - 180, High - 360.
Detail = 180;

// Scale output. Pieces have a 4mm base with varying overhangs and the boards are 4.8mm squares with 0.2mm spacing and margins.
Scale = 1;

// ------------------------------------------------- ;
//         End User Configuration
// ------------------------------------------------- ;

scale(Scale)

if (Generate == 1) {

   GenerateBoard(SetID);

} else if (Generate == 2) {

   GeneratePieces(SetID, PieceID, Detail);

} else if (Generate == 3) {

   TaflPawn(PieceID, Detail);

} else if (Generate == 4) {

   TaflKing(PieceID, Detail);

}

// Board definition
// 0 - Normal Square
// 1 - Black Square
// 2 - White Square
// 3 - Corner
// 4 - Throne

// Generate tafl board by SetID
module GenerateBoard(SetID) {

   if (SetID == 1) {

      // Brandubh
      BoardSize = 7;

      Board = [[3, 0, 0, 1, 0, 0, 3],
               [0, 0, 0, 1, 0, 0, 0],
               [0, 0, 0, 2, 0, 0, 0],
               [1, 1, 2, 4, 2, 1, 1],
               [0, 0, 0, 2, 0, 0, 0],
               [0, 0, 0, 1, 0, 0, 0],
               [3, 0, 0, 1, 0, 0, 3]];

      TaflBoard(BoardSize, Board);

   } else if ((SetID == 2)) {

      // Ard Ri
      BoardSize = 7;

      Board = [[3, 0, 1, 1, 1, 0, 3],
               [0, 0, 0, 1, 0, 0, 0],
               [1, 0, 2, 2, 2, 0, 1],
               [1, 1, 2, 4, 2, 1, 1],
               [1, 0, 2, 2, 2, 0, 1],
               [0, 0, 0, 1, 0, 0, 0],
               [3, 0, 1, 1, 1, 0, 3]];

      TaflBoard(BoardSize, Board);

   } else if ((SetID == 3)) {

      // Tablut
      BoardSize = 9;

      Board = [[3, 0, 0, 1, 1, 1, 0, 0, 3],
               [0, 0, 0, 0, 1, 0, 0, 0, 0],
               [0, 0, 0, 0, 2, 0, 0, 0, 0],
               [1, 0, 0, 0, 2, 0, 0, 0, 1],
               [1, 1, 2, 2, 4, 2, 2, 1, 1],
               [1, 0, 0, 0, 2, 0, 0, 0, 1],
               [0, 0, 0, 0, 2, 0, 0, 0, 0],
               [0, 0, 0, 0, 1, 0, 0, 0, 0],
               [3, 0, 0, 1, 1, 1, 0, 0, 3],];

      TaflBoard(BoardSize, Board);

   } else if (SetID == 4) {

      //Tawlbwrdd
      BoardSize = 11;

      Board = [[3, 0, 0, 0, 1, 1, 1, 0, 0, 0, 3],
               [0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0],
               [0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0],
               [0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0],
               [1, 1, 0, 0, 2, 2, 2, 0, 0, 1, 1],
               [1, 0, 1, 2, 2, 4, 2, 2, 1, 0, 1],
               [1, 1, 0, 0, 2, 2, 2, 0, 0, 1, 1],
               [0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0],
               [0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0],
               [0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0],
               [3, 0, 0, 0, 1, 1, 1, 0, 0, 0, 3]];

      TaflBoard(BoardSize, Board);

   } else if ((SetID == 5)) {

      // Hnefatafl
      BoardSize = 11;

      Board = [[3, 0, 0, 1, 1, 1, 1, 1, 0, 0, 3],
               [0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0],
               [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
               [1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1],
               [1, 0, 0, 0, 2, 2, 2, 0, 0, 0, 1],
               [1, 1, 0, 2, 2, 4, 2, 2, 0, 1, 1],
               [1, 0, 0, 0, 2, 2, 2, 0, 0, 0, 1],
               [1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1],
               [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
               [0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0],
               [3, 0, 0, 1, 1, 1, 1, 1, 0, 0, 3]];

      TaflBoard(BoardSize, Board);

   } else if (SetID == 6) {

      // Alea Evangelii
      BoardSize =19;

      Board = [[3, 3, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 3, 3],
               [3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 3],
               [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
               [0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0],
               [0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 2, 0, 1, 0, 0, 0, 0, 0, 0],
               [1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1],
               [0, 0, 0, 0, 1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0, 0, 0, 0],
               [0, 0, 0, 1, 0, 0, 0, 0, 2, 0, 2, 0, 0, 0, 0, 1, 0, 0, 0],
               [0, 0, 0, 0, 2, 0, 0, 2, 0, 2, 0, 2, 0, 0, 2, 0, 0, 0, 0],
               [0, 0, 0, 1, 0, 0, 2, 0, 2, 4, 2, 0, 2, 0, 0, 1, 0, 0, 0],
               [0, 0, 0, 0, 2, 0, 0, 2, 0, 2, 0, 2, 0, 0, 2, 0, 0, 0, 0],
               [0, 0, 0, 1, 0, 0, 0, 0, 2, 0, 2, 0, 0, 0, 0, 1, 0, 0, 0],
               [0, 0, 0, 0, 1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0, 0, 0, 0],
               [1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1],
               [0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 2, 0, 1, 0, 0, 0, 0, 0, 0],
               [0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0],
               [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1],
               [3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 3],
               [3, 3, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 3, 3]];

      TaflBoard(BoardSize, Board);

   }

};

// Create tafl board.
module TaflBoard(BoardSize, Board) {

   union() {

      cube([(BoardSize * 5) + 0.2, (BoardSize * 5) + 0.2, 1]);

      for (x = [0:BoardSize - 1]) {

         for (y = [0:BoardSize - 1]) {

            translate([(x * 5) + 0.2, (y * 5) + 0.2, 1]) {

              cube([4.8 ,4.8 ,(Board[x][y] + 1) * 0.1]);

            }

         }

      }

   }

};

// Generate set of pieces by SetID.
module GeneratePieces(SetID, PieceID, Detail) {

   if (SetID == 1) {

      // Brandubh
      TaflPieces(
      KingCount = 1,
      WhiteCount = 4,
      BlackCount = 8,
      GridPadding = 0,
      PieceID = PieceID,
      Detail = Detail);

   } else if ((SetID == 2) || (SetID == 3)) {

      // Ard Ri/Tablut
      TaflPieces(
      KingCount = 1,
      WhiteCount = 8,
      BlackCount = 12,
      GridPadding = 0,
      PieceID = PieceID,
      Detail = Detail);

   } else if ((SetID == 4) || (SetID == 5)) {

      // Hnefatafl/Tawlbwrdd
      TaflPieces(
      KingCount = 1,
      WhiteCount = 12,
      BlackCount = 24,
      GridPadding = 1,
      PieceID = PieceID,
      Detail = Detail);

   } else if (SetID == 6) {

      // Alea Evangelii
      TaflPieces(
      KingCount = 1,
      WhiteCount = 24,
      BlackCount = 48,
      GridPadding = 0,
      PieceID = PieceID,
      Detail = Detail);

   }

};

// Generate selected piece layout for printing.
module TaflPieces(KingCount, WhiteCount, BlackCount, GridPadding, PieceID, Detail) {

   TotalCount = BlackCount + WhiteCount + KingCount;

   GridLayout = round(sqrt(TotalCount)) + GridPadding;

   for (x = [1:GridLayout]){

      for (y = [1:GridLayout]){

         CurrentPiece = (((x-1) * GridLayout) + y);

         if (CurrentPiece < KingCount + 1) {

            color("white")
            translate([(x * 5) - 2.5, (y * 5) - 2.5])
            TaflKing(PieceID, Detail);

         } else if ((CurrentPiece > KingCount)&&(CurrentPiece < WhiteCount + KingCount + 1)) {

            color("white")
            translate([(x * 5) - 2.5, (y * 5) - 2.5])
            TaflPawn(PieceID, Detail);

         } else if ((CurrentPiece < TotalCount + 1)&&(CurrentPiece > WhiteCount + KingCount)) {

            color("black")
            translate([(x * 5) - 2.5, (y * 5) - 2.5])
            TaflPawn(PieceID, Detail);

         }

      }

   }

};

// Generate pawn of pieces by PieceID.
module TaflPawn(PieceID, Detail) {

   if (PieceID == 1) {

      HorikTaflPawn(Detail);

   } else if (PieceID == 2) {

      ForkbeardTaflPawn(Detail);

   }

};

// Generate Horik style pawn piece.
module HorikTaflPawn(Detail) {

   // Join pieces into single manifold mesh.
   union() {

      // Rotate extrude base and stem from polygon.
      rotate_extrude($fn=Detail) {
         polygon( points=[ [0, 0], [2, 0], [2.1, 0.2], [1.75, 0.3], [1.5, 0.5], [1.25, 0.8], [1.5, 1], [1.5, 1.1], [1.4, 1.15], [1.2, 1.3], [1, 1.4], [1, 2], [1, 3.4], [1.1, 3.5], [1.1, 3.6], [1, 3.7], [0.5, 5], [0, 5] ] );
      }

      // Create head piece and translate.
      translate([0, 0, 5]) {
         sphere(1.25, center=true, $fn=Detail);
      }

   };

};

// Generate Forkbeard style pawn piece.
module ForkbeardTaflPawn(Detail) {

   // Indent base with low poly sphere.
   difference() {

      // Rotate extrude base from polygon.
      rotate_extrude($fn=Detail) {
         polygon( points=[ [0, 0], [2, 0], [2.1, 0.2], [2.1, 1], [1.8, 1], [1.8, 0.8], [0, 0.8] ] );
      }

      // Indent piece with sphere.
      translate([0, 0, 1.5]) {
         sphere(1, center=true, $fn=6);
      }

   };

};

// Generate king by PieceID.
module TaflKing(PieceID, Detail) {

   if (PieceID == 1) {

      HorikTaflKing(Detail);

   } else if (PieceID == 2) {

      ForkbeardTaflKing(Detail);

   }

};

// Generate Horik style king piece.
module HorikTaflKing(Detail = 180) {

   // Join pieces into single manifold mesh.
   union() {

      // Rotate extrude base and stem from polygon.
      rotate_extrude($fn=Detail) {
         polygon( points=[ [0, 0], [2, 0], [2.1, 0.2], [1.75, 0.3], [1.5, 0.5], [1.25, 0.8], [1.5, 1], [1.5, 1.1], [1.4, 1.15], [1.2, 1.3], [1, 1.4], [1, 2], [1, 5.4], [1.1, 5.5], [1.1, 5.6], [1, 5.7], [0.5, 7], [0, 7] ] );
      }

      // Create head piece and translate.
      translate([0, 0, 7]) {
         sphere(1.25, center=true, $fn=Detail);
      }

   };

};

// Generate Forkbeard style king piece.
module ForkbeardTaflKing(Detail) {

   // Indent base with low poly sphere.
   difference() {

      // Rotate extrude base from polygon.
      rotate_extrude($fn=Detail) {
         polygon( points=[ [0, 0], [2, 0], [2.1, 0.2], [2.1, 1.5], [1.8, 1.5], [1.8, 1.3], [0, 1.3] ] );
      }

      // Indent piece with sphere.
      translate([0, 0, 1.5]) {
         sphere(1, center=true, $fn=8);
      }

   };

};

```


[User]
Hey, I'm looking to get an OpenSCAD design for a dual-extruder calibration block. It'll be pretty simple, but I want it to be parametric. Basically, it's going to have two interlocking shapes. The outer shape is formed by the *difference* of a cube and a rotated copy of that same cube, and the inner shape is the *intersection* of those two same cubes.

I'd like to be able to control the dimensions of the cube, specifically the width, length, and height. I also want to be able to select to render only the outer shape, only the inner shape, or both. Ideally, this would all be controlled by variables at the top of the file. Also, the cubes should be centered in their respective shapes.

Could you write that up for me? I'd prefer it as a single file, if that is reasonable.

[Assistant]
DualColorCalibration.scad:
```
// Which one would you like to see?
part = "all"; // [first:External piece,second:Internal piece,all:Both]
/* [Dimensions */
width = 20;
height = 10;
length = 30;

module color1(){
    difference(){
        cube([width,length,height],center=true);
        rotate([45,0,0]) cube([width,length,height],center=true);
    }
}
module color2(){
    intersection(){
        cube([width,length,height],center=true);
        rotate([45,0,0]) cube([width,length,height],center=true);
    }
}
print_part();

module print_part(){
    if(part=="first"){
       color1();
    }
    else if(part=="second"){
        color2();
    }
    else if(part=="all"){
        color1();
        color2();
    }
}

```