[User]
Okay, so I'm looking to design some stackable storage containers, and I've got some specific requirements. I'd like them to be cylindrical, with a screw-on lid and base, and the ability to add more container sections in the middle. I also want to have an optional SD card holder that is compatible with the system.

Here's what I'm thinking about for the overall design:

*   **Basic Structure:** Cylindrical containers that stack vertically using screw threads. The main components should be a lid, a base, and an add-on container section.
*   **Diameter:** I'd like to be able to set the outer diameter of the containers. Let's start with a default of 80mm.
*   **Height:** I want to be able to customize the height of each add-on container section, which means that I want a parameter for additional height on top of the screw threads for each container section.
*  **Partitions:** I'd also like to have optional internal partitions to divide each container section into smaller compartments. I'd like to specify the number of these partitions, from 1 up to 8.
*   **Threads:** The containers will need threads for stacking. These should follow a standard metric thread, and I want the thread parameters to be configurable, like pitch, height, and margin (for clearance). I'll need a bevel above the threads for smooth stacking.
*  **SD Card Holder:**  I want to include an optional SD card holder. It should have slots for multiple SD cards and will integrate with the same screw-thread system. I'd like to control the placement of the card slots by specifying the radius of the card placement and the angle of separation.

**Parameters I want to control:**

*   `OuterDiameter` (default: 80mm)
*   `Extra_Height` (default: 0, but this should be able to increase to specify the height of the add-on section)
*   `Number_of_Partitions` (default: 1, range 1-8)
*    `ThreadPitch` (default: 4)
*    `ThreadHeight` (default: 10)
*    `ThreadMargin` (default: 1.5)
*    `Bevel` (default 5)
*    `SD_Card_Radius` (default InnerDiameter/2 - SD[0] -1, where SD is the SD card size and should be approximately 25mm in length). I need to be able to specify this in terms of the container's inner radius, as that's what the current code does. I would like the option to specify the distance from the edge of the inner cylinder instead, though.
*    `SD_Card_Separation_Angle` (default, 1, and the SD card slots are placed around the circumference). I need to be able to specify the angular separation of the cards.
*   `SD_Card_Depth_Offset` (default: 2, offset from the base of the container). I want to be able to change the depth of the SD card slots by specifying an offset from the container's base.

**Modules:**

I'll need the following modules:
*   `SDCardHolder()`:  For creating the SD card holder section.
*   `Container(exDepth, numPartitions)`: For creating an add-on container section.
*   `Cap()`: For the top cap.
*   `Base(exDepth, numPartitions)`: For the base of the stack.
*   `StarterKit(exDepth, numPartitions)`: Creates a base and a cap.
*  `LowerThreads()`: Creates the male threads at the lower end of all units.
* `UpperThreads()`: Creates the female threads at the upper end of all units.
* `PartitionCut(height, numPartitions)`: Creates the internal cut for partitions.
*   The metric threads will need to be created via `metric_thread()`, so I'll need to make sure that Dan Kirshner's threads.scad library is used.

I'd like to be able to select which of these parts to render using a `part` variable, which can be set to "starter", "cap", "base", "addon", or "sd".

I'm assuming you can create this from scratch and make it parametric, and that you will use the included `threads.scad` library from Dan Kirshner for the threads. Let me know if you have questions.

[Assistant]
Storage.scad:
```

//
// Customizable Stackable Storage Container
//
// This part was designed June 2019 by Joe McKeown.
// It's available under the terms of the Creative Commons CC-BY 4.0 license
// (https://creativecommons.org/licenses/by/4.0/)
//
// This project uses threads.scad library by Dan Kirshner (dan_kirshner@yahoo.com)
// hosted at http://dkprojects.net/openscad-threads/ This library is intended to be
// accessed via the OpenSCAD use directive
// use <../lib/threads.scad>
// BUT Thingiverse Customizer does not support the use directive, so the library
// is manually included via cut-and-paste, probably the wost way of including a
// library but c'est la vie.
//
// Joe's Customizable Stackable Storage Container is covered by the
// "Works for Me Guarantee" (tm) That means it works for me, but you're on your own.
//

// History:
// V1.0 25 Jun 2019 First Release
// V1.1  2 Jul 2019 Added SD card holder

// Which Part(s) to create:
part = "starter"; // [starter:Starter Kit, cap:Cap, base:Base, addon:Add On Container, sd:SD Card Holder]

// Diameter of the Box
OuterDiameter=80;

// Additional height to add to the container
Extra_Height = 0; // [100]

// Split the containr into this number of partitions
Number_of_Partitions = 1; //[1:8]

/* [Hidden] */
Bevel=5;
InnerDiameter=OuterDiameter-Bevel-7; //Keep InnerDiameter < OuterDiameter - Bevel
ThreadPitch=4;
ThreadHeight=10;
ThreadMargin=1.5;
BaseThick=1.5;
LevelHeight=ThreadHeight+Bevel;

// Use more precision for rendering. UNFORTUNATELY $preview=undef before 2019.05
// So if you're seeing this, and are still on older versions your preview time
// will suck ass. Please upgrade.
$fn = $preview ? 0 : 100;
if (version()[0] < 2019 ) echo("Your version of OpenSCAD is old. Please Upgrade");

if (part == "starter")
    StarterKit(Extra_Height, Number_of_Partitions);
else if (part == "cap")
    Cap();
else if (part == "base")
    Base(Extra_Height, Number_of_Partitions);
else if (part == "addon")
    Container(Extra_Height, Number_of_Partitions);
else if (part == "sd")
    SDCardHolder();

/*
 * Create and SD Card holder compatible with the rest of the system
 */
module SDCardHolder(){
   SD=[25,3,32]; // spec size of SD card (plus some margin)
   InnerRadius = InnerDiameter/2;
   offsX = InnerRadius - SD[0] -1; // Offset of card along X-axis
   offsTheta = 1;
   overallCardHeight = SD[2] + BaseThick + 2;
   exDepth = overallCardHeight - ThreadHeight - Bevel;
   topSpace=10;
   // Circumference of the circle at offsX = 2*PI*Offsx
   // we want an arc of SD[1] + offsTheta
   numCards = floor((2 * PI * offsX) / (SD[1] + offsTheta));
   echo(str("Inner Radius = ", InnerRadius));
      difference(){
         union(){
               LowerThreads();
               translate([0,0,LevelHeight])
                  cylinder(d=OuterDiameter, h=exDepth);
               translate([0,0,LevelHeight+exDepth])
                  UpperThreads();
         }
         translate([0,0,overallCardHeight-topSpace])
            cylinder(d=InnerDiameter, h=topSpace +0.01);
         for (theta = [0:360/numCards:360])
            rotate(theta)
               translate([offsX, -SD[1]/2, BaseThick])
                  color("red")cube(SD);
      }
}

/*
 * The main module. This creates a single container.
 * Extra Depth can be added via the exDepth parameter.
 * The container will be split into partitions based on the numPartitions
 * parameter. Partition counts > 6 may be less than useful though.
 */
module Container(exDepth, numPartitions){
    difference(){
        union(){
            LowerThreads();
            translate([0,0,LevelHeight])
                cylinder(d=OuterDiameter, h=exDepth);
            translate([0,0,LevelHeight+exDepth])
                UpperThreads();
        }
        PartitionCut(LevelHeight+exDepth, numPartitions);
    }
}

/*
 * Create the cap for closing the uppermost container
 */
module Cap(){
    difference(){
        LowerThreads();
        PartitionCut(LevelHeight, 2);
    }
}

/*
 * Base is like Container except there are no threads at the bottom
 */
module Base(exDepth, numPartitions){
    height = LevelHeight+exDepth;
    difference(){
        union(){
            cylinder(d=OuterDiameter, h=height);
            translate([0,0,height])
                UpperThreads();
        }
        PartitionCut(height, numPartitions);
    }
}

/* Simple function to create a base and cap at once. */
module StarterKit(exDepth, numPartitions){
    Offset = OuterDiameter/2 + 1;
    translate([-Offset,0,0])
        Cap();
    translate([ Offset,0,0])
        Base(exDepth, numPartitions);
}

//
// Internal Modules beliw here...
//

/*
 * LowerThreads
 * Creates the male threads at the lower end of all units. Above the threads is a
 * 45-degree bevel that extends out to OuterDiameter. The total height of this
 * module is LevelHeight; i.e. ThreadHeight + BevelHeight.
 * This is a solid piece so the inside of the container will still need to be
 * differenced-out.
 */
module LowerThreads(){
    metric_thread(diameter=OuterDiameter-Bevel, pitch=ThreadPitch, length=ThreadHeight);
    translate([0,0,ThreadHeight])
        cylinder(d1=OuterDiameter-Bevel, d2=OuterDiameter, h=Bevel);
}

/*
 * UpperThreads
 * Creates the female threads ar the upper end of all units. A bevel is created to
 * mate with the bevel on the Lower Threads. The total height of this module is
 * LevelHeight; i.e. ThreadHeight + BevelHeight.
 * This is a hollowed-out piece and can simply be stacked at the top of a container
 * module.
 */
module UpperThreads(){
    difference(){
        cylinder(d=OuterDiameter, h=LevelHeight );
        metric_thread( diameter=OuterDiameter-Bevel+ThreadMargin,
            pitch=ThreadPitch, length=ThreadHeight, internal=true);
        translate([0,0,ThreadHeight-0.01])
            cylinder(d1=OuterDiameter-Bevel, d2=OuterDiameter, h=Bevel+0.02);
        translate([0,0,-0.01]) // This is just here to remove rendering artifacts
            cylinder(d=OuterDiameter-Bevel+ThreadMargin, h=0.02);
    }
}

/*
 * Create a cut-out for the inside of the container. This will need to be removed
 * from a solid container via difference()
 */
module PartitionCut(height, numPartitions){
    n=floor(numPartitions);
    translate([0,0,BaseThick]){
        difference(){
            cylinder(d=InnerDiameter, h=height);
            if (n > 1)
            for(angle = [0:360/n:360])
            rotate(angle)
            translate([0,OuterDiameter/4,height/2])
                cube([5, OuterDiameter/2, height+2], true);
        }
    }
}

/*
 * ================================================================================
 * ================================================================================
 * ================================================================================
 * ================================================================================
 * ================================================================================

 * Here ends the work of Joe McKeown
 *
 * Below this point is the threads library of Dan Kirshner.
 * This file downloaded from // http://dkprojects.net/openscad-threads/threads.scad

 * ================================================================================
 * ================================================================================
 * ================================================================================
 * ================================================================================
 * ================================================================================
 */

/*
 * ISO-standard metric threads, following this specification:
 *          http://en.wikipedia.org/wiki/ISO_metric_screw_thread
 *
 * Copyright 2017 Dan Kirshner - dan_kirshner@yahoo.com
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * See <http://www.gnu.org/licenses/>.
 *
 * Version 2.3.  2017-08-31  Default for leadin: 0 (best for internal threads).
 * Version 2.2.  2017-01-01  Correction for angle; leadfac option.  (Thanks to
 *                           Andrew Allen <a2intl@gmail.com>.)
 * Version 2.1.  2016-12-04  Chamfer bottom end (low-z); leadin option.
 * Version 2.0.  2016-11-05  Backwards compatibility (earlier OpenSCAD) fixes.
 * Version 1.9.  2016-07-03  Option: tapered.
 * Version 1.8.  2016-01-08  Option: (non-standard) angle.
 * Version 1.7.  2015-11-28  Larger x-increment - for small-diameters.
 * Version 1.6.  2015-09-01  Options: square threads, rectangular threads.
 * Version 1.5.  2015-06-12  Options: thread_size, groove.
 * Version 1.4.  2014-10-17  Use "faces" instead of "triangles" for polyhedron
 * Version 1.3.  2013-12-01  Correct loop over turns -- don't have early cut-off
 * Version 1.2.  2012-09-09  Use discrete polyhedra rather than linear_extrude ()
 * Version 1.1.  2012-09-07  Corrected to right-hand threads!
 */

// Examples.
//
// Standard M8 x 1.
// metric_thread (diameter=8, pitch=1, length=4);

// Square thread.
// metric_thread (diameter=8, pitch=1, length=4, square=true);

// Non-standard: long pitch, same thread size.
//metric_thread (diameter=8, pitch=4, length=4, thread_size=1, groove=true);

// Non-standard: 20 mm diameter, long pitch, square "trough" width 3 mm,
// depth 1 mm.
//metric_thread (diameter=20, pitch=8, length=16, square=true, thread_size=6,
//               groove=true, rectangle=0.333);

// English: 1/4 x 20.
//english_thread (diameter=1/4, threads_per_inch=20, length=1);

// Tapered.  Example -- pipe size 3/4" -- per:
// http://www.engineeringtoolbox.com/npt-national-pipe-taper-threads-d_750.html
// english_thread (diameter=1.05, threads_per_inch=14, length=3/4, taper=1/16);

// Thread for mounting on Rohloff hub.
//difference () {
//   cylinder (r=20, h=10, $fn=100);
//
//   metric_thread (diameter=34, pitch=1, length=10, internal=true, n_starts=6);
//}

// ----------------------------------------------------------------------------
function segments (diameter) = min (50, ceil (diameter*6));

// ----------------------------------------------------------------------------
// diameter -    outside diameter of threads in mm. Default: 8.
// pitch    -    thread axial "travel" per turn in mm.  Default: 1.
// length   -    overall axial length of thread in mm.  Default: 1.
// internal -    true = clearances for internal thread (e.g., a nut).
//               false = clearances for external thread (e.g., a bolt).
//               (Internal threads should be "cut out" from a solid using
//               difference ()).
// n_starts -    Number of thread starts (e.g., DNA, a "double helix," has
//               n_starts=2).  See wikipedia Screw_thread.
// thread_size - (non-standard) axial width of a single thread "V" - independent
//               of pitch.  Default: same as pitch.
// groove      - (non-standard) subtract inverted "V" from cylinder (rather than
//               add protruding "V" to cylinder).
// square      - Square threads (per
//               https://en.wikipedia.org/wiki/Square_thread_form).
// rectangle   - (non-standard) "Rectangular" thread - ratio depth/(axial) width
//               Default: 1 (square).
// angle       - (non-standard) angle (deg) of thread side from perpendicular to
//               axis (default = standard = 30 degrees).
// taper       - diameter change per length (National Pipe Thread/ANSI B1.20.1
//               is 1" diameter per 16" length). Taper decreases from 'diameter'
//               as z increases.
// leadin      - 0 (default): no chamfer; 1: chamfer (45 degree) at max-z end;
//               2: chamfer at both ends, 3: chamfer at z=0 end.
// leadfac     - scale of leadin chamfer (default: 1.0 = 1/2 thread).
module metric_thread (diameter=8, pitch=1, length=1, internal=false, n_starts=1,
                      thread_size=-1, groove=false, square=false, rectangle=0,
                      angle=30, taper=0, leadin=0, leadfac=1.0)
{
   // thread_size: size of thread "V" different than travel per turn (pitch).
   // Default: same as pitch.
   local_thread_size = thread_size == -1 ? pitch : thread_size;
   local_rectangle = rectangle ? rectangle : 1;

   n_segments = segments (diameter);
   h = (square || rectangle) ? local_thread_size*local_rectangle/2 : local_thread_size / (2 * tan(angle));

   h_fac1 = (square || rectangle) ? 0.90 : 0.625;

   // External thread includes additional relief.
   h_fac2 = (square || rectangle) ? 0.95 : 5.3/8;

   tapered_diameter = diameter - length*taper;

   difference () {
      union () {
         if (! groove) {
            metric_thread_turns (diameter, pitch, length, internal, n_starts,
                                 local_thread_size, groove, square, rectangle, angle,
                                 taper);
         }

         difference () {

            // Solid center, including Dmin truncation.
            if (groove) {
               cylinder (r1=diameter/2, r2=tapered_diameter/2,
                         h=length, $fn=n_segments);
            } else if (internal) {
               cylinder (r1=diameter/2 - h*h_fac1, r2=tapered_diameter/2 - h*h_fac1,
                         h=length, $fn=n_segments);
            } else {

               // External thread.
               cylinder (r1=diameter/2 - h*h_fac2, r2=tapered_diameter/2 - h*h_fac2,
                         h=length, $fn=n_segments);
            }

            if (groove) {
               metric_thread_turns (diameter, pitch, length, internal, n_starts,
                                    local_thread_size, groove, square, rectangle,
                                    angle, taper);
            }
         }
      }

      // chamfer z=0 end if leadin is 2 or 3
      if (leadin == 2 || leadin == 3) {
         difference () {
            cylinder (r=diameter/2 + 1, h=h*h_fac1*leadfac, $fn=n_segments);

            cylinder (r2=diameter/2, r1=diameter/2 - h*h_fac1*leadfac, h=h*h_fac1*leadfac,
                      $fn=n_segments);
         }
      }

      // chamfer z-max end if leadin is 1 or 2.
      if (leadin == 1 || leadin == 2) {
         translate ([0, 0, length + 0.05 - h*h_fac1*leadfac]) {
            difference () {
               cylinder (r=diameter/2 + 1, h=h*h_fac1*leadfac, $fn=n_segments);
               cylinder (r1=tapered_diameter/2, r2=tapered_diameter/2 - h*h_fac1*leadfac, h=h*h_fac1*leadfac,
                         $fn=n_segments);
            }
         }
      }
   }
}

// ----------------------------------------------------------------------------
// Input units in inches.
// Note: units of measure in drawing are mm!
module english_thread (diameter=0.25, threads_per_inch=20, length=1,
                      internal=false, n_starts=1, thread_size=-1, groove=false,
                      square=false, rectangle=0, angle=30, taper=0, leadin=0,
                      leadfac=1.0)
{
   // Convert to mm.
   mm_diameter = diameter*25.4;
   mm_pitch = (1.0/threads_per_inch)*25.4;
   mm_length = length*25.4;

   echo (str ("mm_diameter: ", mm_diameter));
   echo (str ("mm_pitch: ", mm_pitch));
   echo (str ("mm_length: ", mm_length));
   metric_thread (mm_diameter, mm_pitch, mm_length, internal, n_starts,
                  thread_size, groove, square, rectangle, angle, taper, leadin,
                  leadfac);
}

// ----------------------------------------------------------------------------
module metric_thread_turns (diameter, pitch, length, internal, n_starts,
                            thread_size, groove, square, rectangle, angle,
                            taper)
{
   // Number of turns needed.
   n_turns = floor (length/pitch);

   intersection () {

      // Start one below z = 0.  Gives an extra turn at each end.
      for (i=[-1*n_starts : n_turns+1]) {
         translate ([0, 0, i*pitch]) {
            metric_thread_turn (diameter, pitch, internal, n_starts,
                                thread_size, groove, square, rectangle, angle,
                                taper, i*pitch);
         }
      }

      // Cut to length.
      translate ([0, 0, length/2]) {
         cube ([diameter*3, diameter*3, length], center=true);
      }
   }
}

// ----------------------------------------------------------------------------
module metric_thread_turn (diameter, pitch, internal, n_starts, thread_size,
                           groove, square, rectangle, angle, taper, z)
{
   n_segments = segments (diameter);
   fraction_circle = 1.0/n_segments;
   for (i=[0 : n_segments-1]) {
      rotate ([0, 0, i*360*fraction_circle]) {
         translate ([0, 0, i*n_starts*pitch*fraction_circle]) {
            //current_diameter = diameter - taper*(z + i*n_starts*pitch*fraction_circle);
            thread_polyhedron ((diameter - taper*(z + i*n_starts*pitch*fraction_circle))/2,
                               pitch, internal, n_starts, thread_size, groove,
                               square, rectangle, angle);
         }
      }
   }
}

// ----------------------------------------------------------------------------
module thread_polyhedron (radius, pitch, internal, n_starts, thread_size,
                          groove, square, rectangle, angle)
{
   n_segments = segments (radius*2);
   fraction_circle = 1.0/n_segments;

   local_rectangle = rectangle ? rectangle : 1;

   h = (square || rectangle) ? thread_size*local_rectangle/2 : thread_size / (2 * tan(angle));
   outer_r = radius + (internal ? h/20 : 0); // Adds internal relief.
   //echo (str ("outer_r: ", outer_r));

   // A little extra on square thread -- make sure overlaps cylinder.
   h_fac1 = (square || rectangle) ? 1.1 : 0.875;
   inner_r = radius - h*h_fac1; // Does NOT do Dmin_truncation - do later with
                                // cylinder.

   translate_y = groove ? outer_r + inner_r : 0;
   reflect_x   = groove ? 1 : 0;

   // Make these just slightly bigger (keep in proportion) so polyhedra will
   // overlap.
   x_incr_outer = (! groove ? outer_r : inner_r) * fraction_circle * 2 * PI * 1.02;
   x_incr_inner = (! groove ? inner_r : outer_r) * fraction_circle * 2 * PI * 1.02;
   z_incr = n_starts * pitch * fraction_circle * 1.005;

   /*
    (angles x0 and x3 inner are actually 60 deg)

                          /\  (x2_inner, z2_inner) [2]
                         /  \
   (x3_inner, z3_inner) /    \
                  [3]   \     \
                        |\     \ (x2_outer, z2_outer) [6]
                        | \    /
                        |  \  /|
             z          |[7]\/ / (x1_outer, z1_outer) [5]
             |          |   | /
             |   x      |   |/
             |  /       |   / (x0_outer, z0_outer) [4]
             | /        |  /     (behind: (x1_inner, z1_inner) [1]
             |/         | /
    y________|          |/
   (r)                  / (x0_inner, z0_inner) [0]

   */

   x1_outer = outer_r * fraction_circle * 2 * PI;

   z0_outer = (outer_r - inner_r) * tan(angle);
   //echo (str ("z0_outer: ", z0_outer));

   //polygon ([[inner_r, 0], [outer_r, z0_outer],
   //        [outer_r, 0.5*pitch], [inner_r, 0.5*pitch]]);
   z1_outer = z0_outer + z_incr;

   // Give internal square threads some clearance in the z direction, too.
   bottom = internal ? 0.235 : 0.25;
   top    = internal ? 0.765 : 0.75;

   translate ([0, translate_y, 0]) {
      mirror ([reflect_x, 0, 0]) {

         if (square || rectangle) {

            // Rule for face ordering: look at polyhedron from outside: points must
            // be in clockwise order.
            polyhedron (
               points = [
                         [-x_incr_inner/2, -inner_r, bottom*thread_size],         // [0]
                         [x_incr_inner/2, -inner_r, bottom*thread_size + z_incr], // [1]
                         [x_incr_inner/2, -inner_r, top*thread_size + z_incr],    // [2]
                         [-x_incr_inner/2, -inner_r, top*thread_size],            // [3]

                         [-x_incr_outer/2, -outer_r, bottom*thread_size],         // [4]
                         [x_incr_outer/2, -outer_r, bottom*thread_size + z_incr], // [5]
                         [x_incr_outer/2, -outer_r, top*thread_size + z_incr],    // [6]
                         [-x_incr_outer/2, -outer_r, top*thread_size]             // [7]
                        ],

               faces = [
                         [0, 3, 7, 4],  // This-side trapezoid

                         [1, 5, 6, 2],  // Back-side trapezoid

                         [0, 1, 2, 3],  // Inner rectangle

                         [4, 7, 6, 5],  // Outer rectangle

                         // These are not planar, so do with separate triangles.
                         [7, 2, 6],     // Upper rectangle, bottom
                         [7, 3, 2],     // Upper rectangle, top

                         [0, 5, 1],     // Lower rectangle, bottom
                         [0, 4, 5]      // Lower rectangle, top
                        ]
            );
         } else {

            // Rule for face ordering: look at polyhedron from outside: points must
            // be in clockwise order.
            polyhedron (
               points = [
                         [-x_incr_inner/2, -inner_r, 0],                        // [0]
                         [x_incr_inner/2, -inner_r, z_incr],                    // [1]
                         [x_incr_inner/2, -inner_r, thread_size + z_incr],      // [2]
                         [-x_incr_inner/2, -inner_r, thread_size],              // [3]

                         [-x_incr_outer/2, -outer_r, z0_outer],                 // [4]
                         [x_incr_outer/2, -outer_r, z0_outer + z_incr],         // [5]
                         [x_incr_outer/2, -outer_r, thread_size - z0_outer + z_incr], // [6]
                         [-x_incr_outer/2, -outer_r, thread_size - z0_outer]    // [7]
                        ],

               faces = [
                         [0, 3, 7, 4],  // This-side trapezoid

                         [1, 5, 6, 2],  // Back-side trapezoid

                         [0, 1, 2, 3],  // Inner rectangle

                         [4, 7, 6, 5],  // Outer rectangle

                         // These are not planar, so do with separate triangles.
                         [7, 2, 6],     // Upper rectangle, bottom
                         [7, 3, 2],     // Upper rectangle, top

                         [0, 5, 1],     // Lower rectangle, bottom
                         [0, 4, 5]      // Lower rectangle, top
                        ]
            );
         }
      }
   }
}

```


[User]
Hi, I'm looking to design a parametric spiral cup, kind of like the one I saw on GitHub. I need a way to adjust the height and diameter of the cup, the number of spirals, the size and eccentricity of those spirals, and how much they twist. I'd also like to be able to control the base height and how much the top tapers.

Ideally, I'd like to have parameters for:

*   **Overall Dimensions:**
    *   `height`: The total height of the cup.
    *   `diameter`: The diameter of the cup.
*   **Spiral Properties:**
    *   `spiral_count`: How many spirals go around the cup.
    *   `spiral_diameter`: The diameter of each individual spiral.
    *  `spiral_eccentricity`:  How much the spiral is offset from the center. A value of 0 would be a circle, and higher values move the circle toward the edge of the cup.
    *   `spiral_twist`: How much the spirals twist as they go up the cup.
*   **Base & Taper:**
    *   `base_height`:  The height of the straight base.
    *   `taper_twist`: How much the top of each spiral tapers.

Could you generate a parametric OpenSCAD file (or files if necessary) that does this? I'm hoping for something like this that will print well, without needing supports. It'd be great if the resolution could also be adjusted with a `resolution` parameter, too.

[Assistant]
spiral_cup.scad:
```
/********************************************************
 * Parametric Spiral Cup 06/25/2019 - vsergeev
 * https://github.com/vsergeev/3d-spiral-cup
 * CC-BY-4.0
 ********************************************************/

/* [Basic] */

// in mm
height = 100;

// in mm
diameter = 60;

resolution = 50; // [30:Draft 30, 50:Normal 50, 70:Smooth 70]

/* [Spiral] */

spiral_count = 15; // [4:32]

// in mm
spiral_diameter = 10;

// from 0 to 1
spiral_eccentricity = 0.5; // [0:0.1:0.9]

// in degrees
spiral_twist = 90; // [0:10:360]

/* [Custom] */

// in mm
base_height = 5;

// in degrees
taper_twist = 12.5; // [0:0.5:30]

/* [Hidden] */

$fn = resolution;

spiral_height = height - base_height;
taper_height = base_height;

spiral_position = (diameter - spiral_diameter * (1 - spiral_eccentricity)) / 2;

module spiral(index) {
    spiral_phase = (360 / spiral_count) * index;

    translate([0, 0, base_height])
    linear_extrude(height = spiral_height, center = false, twist = spiral_twist)
        rotate([0, 0, spiral_phase])
        translate([spiral_position, 0, 0])
        scale([1 - spiral_eccentricity, 1])
        circle(d = spiral_diameter);
}

module taper(index) {
    /* Phase of spiral at z = spiral_height - taper_height */
    taper_phase = (360 / spiral_count) * index - (1 - (taper_height / spiral_height)) * spiral_twist;

    /* Generate one vertical (twist=0) cylinder and one twisted cylinder (twist=taper_twist) */
    for (twist = [0, taper_twist]) {
        translate([0, 0, base_height + spiral_height - taper_height])
        linear_extrude(height = taper_height, center = false, twist = twist)
            rotate([0, 0, taper_phase])
            translate([spiral_position, 0, 0])
            scale([1 - spiral_eccentricity, 1])
            circle(d = spiral_diameter);
    }
}

module cup() {
    union() {
        /* Base */
        cylinder(d = diameter, h = base_height);

        /* Spirals */
        for (i = [0:spiral_count - 1])
            spiral(i);

        /* Spiral Tapers */
        for (i = [0:spiral_count - 1]) {
            if ($preview && resolution < 70)
                union() taper(i);
            else
                hull() taper(i);
        }
    }
}

cup();

```


[User]
Hey, I'm looking to design a Raspberry Pi case with a parametric fan mount on the front and screw holes on the back. I've seen some designs out there, but I'd really like to generate the scad files from scratch. I'm thinking the design will work like this: I'll use a `pi_front.stl` and `pi_back.stl` for the basic case shape and then add to it parametrically.

For the front, I want to add a bumper and a fan mount that's customizable for different fan sizes, as well as the correct screw holes.  Specifically, I need to be able to set the distance between the fan screw holes (like 24.0, 28.8, 31.8, and 40.8 for 30mm, 35mm, 40mm, and 50mm fans). The diameter of the screw holes needs to be adjustable, as well as the fan's Y-axis offset. It needs to cut a circular hole for the fan to sit in, as well as four screw holes for mounting. I'd also like to be able to adjust the bumper's dimensions (min/max X/Y and thickness) on the front of the case. And, I'd like to set the coordinates for the center of the fan mount.

On the back, I need to add parametric screw holes.  I need to set the screw hole diameter, the screw head diameter, the total hole height, and the screw head height. It will also be important to set the X and Y coordinates for the screw positions. There will be four screw positions, one on each corner.

I'm not very familiar with libraries, so can you write it using just OpenSCAD and not rely on anything external? I don't need separate modules or files, just the complete code for both the front and back design.

[Assistant]
pi_front_with_fan.scad:
```
//pi_front_with_fan.scad by MegaSaturnv

/////////////////////////////
// Customizable Parameters //
/////////////////////////////

/* [Basic] */
//Distance between the fan screw holes. Typically 24.0, 28.8, 31.8 and 40.8 for 30mm, 35mm, 40mm and 50mm fans
FAN_SIZE = 31.8;
//Diameter of the fan screw holes
FAN_SCREW_DIAMETER = 4;
//Offset the fan in the Y-axis. May be needed for fans larger than 50mm
FAN_Y_OFFSET = 0;

/* [Advanced] */
BUMPER_MIN_X = -2;
BUMPER_MIN_Y = -6;
BUMPER_MAX_X = 58;
BUMPER_MAX_Y = 55;
BUMPER_THICKNESS_Z = 4;
SCREW_POS_X = 58;
SCREW_POS_Y = 49;
FAN_DIAMETER = FAN_SIZE + FAN_SCREW_DIAMETER;

////////////////
// Main Model //
////////////////

//Use $fn = 24 if it's a preview. $fn = 96 for the render
$fn = $preview ? 24 : 96;

difference() {
	union() {
		import("pi_front.stl");
		translate([BUMPER_MIN_X,BUMPER_MIN_Y,0])
		cube([BUMPER_MAX_X-BUMPER_MIN_X, BUMPER_MAX_Y-BUMPER_MIN_Y, BUMPER_THICKNESS_Z]);
	}

	translate([SCREW_POS_X/2, SCREW_POS_Y/2 + FAN_Y_OFFSET, -0.1])
	cylinder(r=FAN_DIAMETER/2, h=BUMPER_THICKNESS_Z+0.2);

	translate([SCREW_POS_X/2 - FAN_SIZE/2, SCREW_POS_Y/2 - FAN_SIZE/2 + FAN_Y_OFFSET, -0.1])
	cylinder(r=FAN_SCREW_DIAMETER/2, h=BUMPER_THICKNESS_Z+0.2);

	translate([SCREW_POS_X/2 + FAN_SIZE/2, SCREW_POS_Y/2 - FAN_SIZE/2 + FAN_Y_OFFSET, -0.1])
	cylinder(r=FAN_SCREW_DIAMETER/2, h=BUMPER_THICKNESS_Z+0.2);

	translate([SCREW_POS_X/2 - FAN_SIZE/2, SCREW_POS_Y/2 + FAN_SIZE/2 + FAN_Y_OFFSET, -0.1])
	cylinder(r=FAN_SCREW_DIAMETER/2, h=BUMPER_THICKNESS_Z+0.2);

	translate([SCREW_POS_X/2 + FAN_SIZE/2, SCREW_POS_Y/2 + FAN_SIZE/2 + FAN_Y_OFFSET, -0.1])
	cylinder(r=FAN_SCREW_DIAMETER/2, h=BUMPER_THICKNESS_Z+0.2);
}

```
pi_back_with_screw_holes.scad:
```
//pi_back_with_screw_holes.scad by MegaSaturnv

/////////////////////////////
// Customizable Parameters //
/////////////////////////////
/* [Basic] */
//Diameter of the screw holes
SCREW_HOLE_DIAMETER = 3.5;
//Diameter of the screw head
SCREW_HEAD_DIAMETER = 5.25;

/* [Advanced] */
SCREW_HOLE_HEIGHT = 15;
SCREW_HEAD_HEIGHT = 2;
SCREW_HOLE_POS_X = 58;
SCREW_HOLE_POS_Y = 49;

/////////////
// Modules //
/////////////
module screwHole() {
	cylinder(r=SCREW_HOLE_DIAMETER/2, h=SCREW_HOLE_HEIGHT); //gap for screw thread
	cylinder(r=SCREW_HEAD_DIAMETER/2, h=SCREW_HEAD_HEIGHT); //gap for screw head
	translate([0, 0, SCREW_HEAD_HEIGHT]) cylinder(r1=SCREW_HEAD_DIAMETER/2, r2=SCREW_HOLE_DIAMETER/2, h=SCREW_HEAD_HEIGHT/2); //Cone to prevent 90 degree overhanging edges
}

module screwHole2() {
	union() {
		cylinder(r=SCREW_HOLE_DIAMETER/2, h=SCREW_HOLE_HEIGHT); //gap for screw thread
		cylinder(r=SCREW_HEAD_DIAMETER/2, h=SCREW_HEAD_HEIGHT); //gap for screw head
		translate([0, 0, SCREW_HEAD_HEIGHT]) cylinder(r1=SCREW_HEAD_DIAMETER/2, r2=SCREW_HOLE_DIAMETER/2, h=SCREW_HEAD_HEIGHT/2); //Cone to prevent 90 degree overhanging edges
	}
}

////////////////
// Main Model //
////////////////

//Use $fn = 24 if it's a preview. $fn = 96 for the render
$fn = $preview ? 24 : 96;

difference() {
	import("pi_back.stl");

	screwHole();

	translate([SCREW_HOLE_POS_X, 0, 0])
	screwHole();

	translate([0, SCREW_HOLE_POS_Y, 0])
	screwHole();

	translate([SCREW_HOLE_POS_X, SCREW_HOLE_POS_Y, 0])
	screwHole();
}
```


[User]
Okay, I'm looking to create a customizable mesh in OpenSCAD, and I want it to be flexible enough for various projects. I’ve attached an example that gives a pretty good idea of what I'm after, but I need to expand it and make it more flexible. Basically, I want to be able to create a square mesh with a border, and then fill the center with a grid of holes.

Here's a more detailed breakdown of the features I'm looking for:

*   **Overall Shape and Size:** The mesh should be square, and I need to be able to specify the side length.
*   **Mesh Height:**  I also need to be able to control the thickness/height of the mesh.
*   **Border:**  There should be a solid border around the edge of the mesh, the thickness of which should be customizable.
*   **Hole Shape:** This is a big one. I want to be able to choose the shape of the holes in the mesh from a set of options: circle, triangle, square, or hexagon.
*   **Hole Size:**  I need to be able to define the diameter of the hole (for circles), or side length for other shapes
*   **Hole Spacing:** I need control over the spacing between each hole.
*   **Parametric Design:** Everything should be parametric so I can easily adjust all of these features.

I'm looking for a completely parametric design where I can set the side length of the mesh, the height, border size, hole shape, hole size, and the spacing between holes. I don’t need any external libraries beyond the basic OpenSCAD functionality. The attached example should be enough to get the general idea, but it needs to be much more configurable.

Also, please keep in mind that the $fn variable, which controls the number of fragments per circle, can have a significant impact on rendering time, especially at higher numbers. Maybe a comment somewhere would be useful so users don’t set it too high.

Thanks!

[Assistant]
mesh.scad:
```

// Length of the sides in mm. Mesh is always square
side_length = 120;
// Height of the mesh in mm
height = 3;
// Diameter of each 'hole' in the mesh in mm
hole_diameter = 8;
// Amount of buffer space between the outer edge and the holes
border = 3.5;
// How close is each hole to neighbors
grid_spacing = 3; // [1:9]

// OpenSCAD variable for number of fragments in each hole - Below 7 will get you misc shapes while above makes circle approximations
$fn=10; // [3:30]

module mesh(side_length, height, hole_diameter, border, grid_spacing) {
  // Ensure the border is sane
  border = min(border, side_length / 2.5);
  size = side_length;

  // We can only place holes in the non-border, and
  // each hole actually takes a bit of addl. spacing
  hole_footprint = hole_diameter * (1 + grid_spacing);
  s_avail = size - border*2;
  hole_count = ceil(s_avail / hole_footprint);
  hole_r = hole_diameter / 2;

  // Diagnostic data
  echo(hole_footprint);
  echo(str("We have ", s_avail, "mm of space for holes"));
  echo(str("We will place ", hole_count, " holes"));
  echo(str("Each hole has a footprint of ", hole_footprint, "mm-squared"));

  union(){
    cube([size,border,height]);
    cube([border,size,height]);
    translate([size-border,0,0]) cube([border,size,height]);
    translate([0,size-border,0]) cube([size,border,height]);

    difference() {
      cube(size=[size, size, height]);

      translate([border + hole_r, border+hole_r, -1])
      for (x = [0:hole_count - 1]) {
        translate([x * hole_footprint, 0, 0])
        for (y = [0:hole_count - 1]) {
          translate([0, y * hole_footprint, 0])
          cylinder(r=hole_diameter / 2, h=height*4);
        }
      }
    }
  }
}

mesh(side_length,
  height,
  hole_diameter,
  border,
  grid_spacing / 10);

```


[User]
Hey, I'm looking to create a dice rolling tray with some cool features for counting large numbers of dice. I've been playing a lot of Warhammer 40k lately with my Ork army and rolling and counting so many dice is getting tiresome.

Essentially, I want a tray that has a grid for holding dice in neat rows. I'd like to be able to specify the dice size (like 12mm for standard dice), the number of dice per row, how many dice deep each row is, and the number of rows. So, you could say something like: "12mm dice, 5 dice across, 2 dice deep, 10 rows".

I'd also like to have a wall around the tray, so the dice don't go everywhere. The thickness of that wall should also be parametric. I was thinking there could be some engraved lines or grooves on the walls that help separate each section, and even a little angled section on top with text for showing a count of how many dice each row of dice would be.

It's kind of hard to describe, but I've attached a prototype SCAD file.  I'm using `std`, so you should too.

I'd like the design to be parametric in the following way:

*   `dice_size`:  The size of one side of a die in mm.
*   `dice_per_row`: How many dice across the tray each row holds.
*   `dice_row_depth`: How many dice deep each row is.
*   `dice_rows`: The total number of rows of dice.
*   `wall_width`: The thickness of the tray's walls.
*   `engrave_depth`: How deep the engraved lines/text should be.
*   `legend_width`: The width of the angled section with the text on top.
*   `side_fudge_ratio`: A ratio for additional space on the sides for dice that may be oversized.

And in particular, I think these calculations from my original code should be kept as is:

```
side_fudge = dice_size* side_fudge_ratio;
engrave_box_offset = engrave_depth/sqrt(2);
```

It would be really cool if the code was relatively well-commented, as I'm still learning OpenSCAD.

The main idea is to have a solid tray that holds a variable number of dice (based on the parameters I mentioned) in a neat array. Can you generate OpenSCAD code to accomplish this using `std`?

[Assistant]
dice_count_tray.scad:
```

// dice size - length of one side (millimeters)
dice_size = 12.0;

// number of dice across width of tray
dice_per_row = 5; // [1:20]

// number of dice 'deep' per row
dice_row_depth = 2; // [1:10]

// number of rows of dice
dice_rows = 10; // [1:30]

// width of wall (millimeters)
wall_width = 3; // [1:0.1:10]

// depth of engraving
engrave_depth = wall_width / 4;

// width of legend (angled section on top)
legend_width = dice_size*0.7;

// added extra space on sides - in case it's too tight
side_fudge_ratio= 0.25; // [0:0.05:0.35]

// *************************************************************
/* [Hidden] */

side_fudge = dice_size* side_fudge_ratio; // [0:0.01:5]

engrave_box_offset = engrave_depth/sqrt(2);

$fn = 16;

module legend() {
    text_size = legend_width/3;
   // union()
   difference()
    {
        cube( [ dice_size *dice_rows,   wall_width,  legend_width ] );

        // decorate legend rows
        for ( row = [ 0:dice_rows ] ) {
            row_edge_x = row * dice_size;

            translate( [row_edge_x, 0, 0 ] ) {
                    translate( [0, -(engrave_depth/sqrt(2)), 0] )  {
                            // cut line
                            rotate( [ 0, 0, 45 ] ) {
                                cube( [engrave_depth,engrave_depth,legend_width] );
                            }
                            // add text (dice count)
                            translate( [ -engrave_box_offset-text_size*0.14, engrave_depth, legend_width*0.5 ] ) {
                                rotate( [90, -90, 0 ] )
                                    linear_extrude( height=engrave_depth, convexity = 10 ) {
                                    text( str( row * dice_per_row * dice_row_depth ),
                                            size=text_size ,
                                            halign="center",
                                            valign="bottom"
                                        );
                                }
                            }
                        }
                }
        }
    }
}

function bit_set(b, n) = floor(n / pow(2, b)) % 2;

module dice_grid_corner( dice ) {

    lip_length = max( wall_width*2, wall_width + side_fudge*2.01 );
    difference()
    //union()
    {
        union() {
            cube( [dice_size * dice, wall_width, lip_length]  );
            cube( [dice_size * dice, lip_length, wall_width]  );
        }

        for ( d = [ 0:dice ] ) {
                row_edge_x = d * dice_size;
                translate( [row_edge_x, 0, 0 ]  ) {
                       translate( [0,0,wall_width-engrave_box_offset] ) {
                            rotate( [ 0, -45, 0 ] ) {
                                cube( [engrave_depth, lip_length, engrave_depth] );
                            }
                            rotate( [ -45, 0, 0 ] ) {
                              //  cube( [wall_width*2,engrave_depth, engrave_depth] );
                            }
                        }
                       translate( [-engrave_box_offset, wall_width, wall_width] ) {
                            rotate( [  0, 0, -45 ] ) {
                               cube( [engrave_depth, engrave_depth, lip_length] );
                            }
                        }
                }
            }
        }
}

module dice_grid( rows, columns, with_corner = 0 ) {
    echo( "dice_grid ", rows ,  columns ,  with_corner );
    translate( [0,0,-wall_width] )  {
        //union()
        difference()
        {
            union() {
                cube( [ dice_size *rows,  dice_size * columns, wall_width ] );
                if( bit_set(0, with_corner) ) {
                    echo( "adding bottom corner" );
                        translate( [0,-wall_width,0] ) {
                            dice_grid_corner( rows );
                        }
                }
                if( bit_set(1,with_corner ) ) {
                        echo( "adding left corner" );
                        rotate( [90,0,90] ) {
                            translate( [0,0,-wall_width-engrave_box_offset-side_fudge] ) {
                                dice_grid_corner( columns );
                            }
                        }
                }
                if( bit_set(2,with_corner ) ) {
                        echo( "adding right corner" );
                        translate( [dice_size *rows+wall_width+side_fudge,dice_size *columns, 0] ) {
                            rotate( [90,0,-90] ) {
                                dice_grid_corner( columns );
                            }
                            //cube( [ wall_width, dice_size * columns,wall_width*2]  );
                            //cube( [wall_width*2,dice_size * columns,  wall_width]  );
                        }
                }

            }
            union() {
                // cut column lines
                for( layer = [ 0:columns ] ) {
                    translate( [ 0, dice_size * layer,wall_width] ) {
                        rotate( [ -45, 0,0] ) {
                            cube( [  dice_size * rows, engrave_depth, engrave_depth ] );
                        }
                    }
                }

                // cut lines on side wall
                for ( row = [ 0:rows ] ) {
                    row_edge_x = row * dice_size;
                    translate( [row_edge_x, 0, wall_width-engrave_box_offset ] ) {
                        rotate( [ 0, -45, 0 ] ) {
                            cube( [engrave_depth,dice_size*columns,engrave_depth] );
                        }
                    }
                }
            }
        }
    }
}

module side() {
    dice_grid( dice_rows, dice_row_depth, 1 );
}

module sides() {
    legend_extra = legend_width*sin(45);
    lip_size = dice_size * dice_row_depth;
    union() {
        // right side
        translate( [0,dice_size * dice_per_row+side_fudge,0] ) {
            rotate( [ 90,0,0] ) {
                side();
                translate( [0,dice_size * dice_row_depth,0] ) {
                    rotate( [-135,0,0] ) {
                        legend();
                    }
                }
                    translate( [
                dice_size *dice_rows,  0, -wall_width ] ) {
                    linear_extrude(height = wall_width) {
                        polygon( points = [
                                    [0,0],
                                    [0,lip_size],
                                    [lip_size,0]
                        ] );
                    }
                }
            }
        }
        // left side
        translate( [dice_size * dice_rows,-side_fudge, 0] ) {
            rotate( [-90,180,0] ) {
                side();
                    translate( [ 0,  0, -wall_width ] ) {
                        linear_extrude(height = wall_width) {
                            polygon( points = [
                                    [0,0],
                                    [0,lip_size],
                                    [-lip_size,0]
                        ] );
                    }
                }
            }
        }
        translate( [0,-legend_extra-side_fudge,dice_size * dice_row_depth + legend_extra] ) {
            rotate( [-135,0,0] ) {
                legend();
            }
        }

        // bottom lip
        translate( [dice_size * dice_rows,-side_fudge -wall_width, -wall_width] ) {
            cube( [ lip_size, dice_size * dice_per_row + (side_fudge+wall_width)*2, wall_width ] );
        }

        // end
        translate( [0, engrave_box_offset, 0] ) {
             rotate( [0,0,90] ) {
                rotate( [90,0,0] ) {
                        dice_grid(  dice_per_row, dice_row_depth, 7 );
                        translate(  [-legend_extra-engrave_box_offset,dice_row_depth * dice_size,-wall_width] ) {
                            cube( [ dice_per_row *dice_size+legend_extra*2, legend_extra,wall_width] );
                        }
                    }
                }
         }
    }
}

sides();
dice_grid( dice_rows, dice_per_row );

```


[User]
I'm looking to create a customizable corner bracket, something like a winkel, but with a lot of adjustable parameters. I've been messing around with a design but it's getting complicated, so I'd like help generating a parametric OpenSCAD file.

Here's the basic idea:

The bracket will have two sides, each with its own length, and a fixed thickness. The width of the bracket itself should also be adjustable. I want to be able to control the number of screw holes on each side, both horizontally and vertically. So for each side, I'd like to be able to set the number of screws along its length (vertical screws) and the number of screws along the width (horizontal screws).

For the screw holes, I need control over:
    - The distance from the edges (left/right and top/bottom).
    - A chamfer option. It should be able to chamfer the hole on either the inside or outside edge, or have no chamfer at all.
    - The radius of the screw hole, as well as the radius and height of the chamfer. Additionally, the inner diameter of the chamfer should also be a parameter so I can have it be a cylindrical hole or a true chamfer, as needed.

I'd also like to be able to add extra reinforcing ribs along the width of the bracket. This "extra strong" version should be optional, with a parameter controlling the number of ribs, as well as the rib thickness. The ribs should extend along the width of the bracket from the corner.

Here's a summary of the adjustable parameters I need:
    - `thickness`: The material thickness
    - `width`: The overall width of the bracket
    - `y_length1`: The length of the first side
    - `y_length2`: The length of the second side
    - `screws_y_vertical`: The number of screw holes along the length of each side
    - `screws_x_horizontal`: The number of screw holes along the width of each side
    - `screw_campher_side1`: Chamfer type for the first side ("outside", "inside", or "none")
    - `screw_campher_side2`: Chamfer type for the second side ("outside", "inside", or "none")
    - `screw_campher_radius`: Radius of the outer chamfer edge
    - `screw_campher_height`: Height of the chamfer
    - `screw_campher_radius_lower`: Radius of the inner chamfer edge (can be used for a cylindrical hole or chamfer)
    - `screw_distance_border_left_right`: Distance of screws from the left and right edges
    - `screw_distance_top`: Distance of screws from the top edge
    - `screw_distance_bottom1`: Distance of screws from the bottom edge of the first side
    - `screw_distance_bottom2`: Distance of screws from the bottom edge of the second side
    - `screw_radius`: Radius of the screw hole
    - `amount_extra_strong`: Number of reinforcing ribs (set to zero for no ribs)
    - `extra_strong_thickness`: Thickness of the reinforcing ribs

Ideally, the design would be clean and well-commented. It'd be a single .scad file. I don't need any external libraries for this. Thanks!

[Assistant]
new_custom_winkel2.scad:
```
//new winkel

// ************* Declaration part *************

// material strength
thickness=3;

//width of the angle
width=60;

//each side can be tuned to its own length
y_lenght1=30;
y_lenght2=30;

//amount of screws vertical
screws_y_vertical=1;

//amount of screws horizontal
screws_x_horizontal=3;

// campher of side 1
screw_campher_side1="inside";  //[outside:Outside, inside:Inside , none:None ]

//campher of side 2
screw_campher_side2="inside";  //[outside:Outside, inside:Inside , none:None ]

screw_campher_radius=3;
screw_campher_height=2;
screw_campher_radius_lower=3; //set this value equal to "screw_campher_radius" or "screw_radius". Setting it to screw_radius wil lcreate a campher, setting it to "screw_campher_radius" will create a cylindric hole

screw_distance_border_left_right=8; // important: if only 1 screw vertical is set, then this valus defines where this single screw is set. if you want it in the middle, then set it to "width/2"
screw_distance_top=10;
screw_distance_bottom1=6; // important: if only 1 screw horizontal is set, then this valus defines where this single screw is set. if you want it in the middle, then set it to "y_lenght1/2"
screw_distance_bottom2=10; // important: if only 1 screw horizontal is set, then this valus defines where this single screw is set. if you want it in the middle, then set it to "y_lenght1/2"
screw_radius=2;
amount_extra_strong=4;  // set higher value as zero to make extra strong
extra_strong_thickness=3;

module extra_stark () {
    step = (amount_extra_strong>1) ? (width-amount_extra_strong*extra_strong_thickness)/(amount_extra_strong-1):1;

    d=[[0,0],[y_lenght2-thickness,0],[0,y_lenght1-thickness]];
    for (x=[0:amount_extra_strong-1])
            translate ([x*(step+extra_strong_thickness)+extra_strong_thickness,y_lenght1-thickness,0])
                rotate ([0,90,180])
                linear_extrude (height=extra_strong_thickness) polygon (d);
}

module side (lenght,campher,screw_distance_bottom) {
    difference () {
    screw_step_y = (screws_y_vertical>1) ? (lenght-screw_distance_top-screw_distance_bottom)/(screws_y_vertical-1):0;
    screw_step_x = (screws_x_horizontal>1) ? (width-2*screw_distance_border_left_right)/(screws_x_horizontal-1):0;
    echo ("length",lenght,"width",width,"screw_step_y",screw_step_y,"screw_step_x",screw_step_x);
    cube ([width,lenght,thickness]);

    for (y=[0:screws_y_vertical-1])
         for (x=[0:screws_x_horizontal-1]) {
             echo (lenght,y,x);
            translate ([screw_distance_border_left_right+x*screw_step_x,screw_distance_bottom+y*screw_step_y,0])
                {
                    //screw
                    cylinder (r=screw_radius,h=thickness,$fn=20);
                    //campher
                    if (campher=="outside") translate ([0,0,thickness-screw_campher_height]) cylinder (r1=screw_campher_radius_lower,r2=screw_campher_radius,h=screw_campher_height,$fn=20);
                    if (campher=="inside") cylinder (r2=screw_campher_radius_lower,r1=screw_campher_radius,h=screw_campher_height,$fn=20);
                    } //end translate
          } //end x-loop
    } //end diff
} //end

module winkel () {
    side (y_lenght1,screw_campher_side1,screw_distance_bottom1);
    translate ([0,y_lenght1-thickness,-y_lenght2+thickness]) mirror ([0,1,0]) rotate ([90,0,0]) side (y_lenght2,screw_campher_side2,screw_distance_bottom2);
}

//main
winkel ();
if (amount_extra_strong>0) extra_stark ();

```


[User]
Hi! I'm trying to design a Raspberry Pi 4 case with a customizable fan mount, and I'm having a bit of trouble getting started with OpenSCAD. I've seen some designs online, and I really like how flexible the one by MegaSaturnv is, especially the version with the extended screw holes for larger fans. It seems like a good base, but I'd prefer to have all of the code generated from scratch instead of relying on an imported STL for the Pi front plate.

So, ideally, I want a parametric OpenSCAD design (or set of files) for a Raspberry Pi 4 case, split into a front and back piece.

Here are the specific features I want:

**Front Piece:**

*   **Parametric Fan Mount:**
    *   Adjustable screw hole diameter for the fan.
    *   Adjustable width of the fan screw mount area.
    *   An option to enable/disable extended screw holes for larger fans.
    *   If enabled, adjustable length of the extended screw holes.
    *   Adjustable position and diameter of the main fan hole.
    *   Adjustable angle for the screw mounts.
    *   Adjustable angle for the extended screw mounts.
*   **Pi Dimensions:** The front piece needs to fit a RPi4; it should match the general shape and dimensions of the imported `pi_front.stl` file referenced in the example, but it should be generated programmatically. I can look up specific dimensions if needed, but can we start with just the core case shape and worry about ports later?
*   **Bumper:** A bumper surrounding the Pi with adjustable size and thickness.
*   **Screw Mount:** It needs to include the same screw mounts as on the back panel.
*   **No Imported STL's** - I'd like to avoid importing an STL file for the main case shape if possible. I think it'd be more robust and easily customized if this were generated from basic primitives instead.

**Back Piece:**

*   **Screw Holes:**
    *   Adjustable diameter for the screw holes.
    *   Adjustable diameter for the screw head countersink.
    *   Adjustable height for the screw holes.
    *   Adjustable height for the screw head countersink.
    *   The screw holes should be designed with countersinks for the screw heads, so they sit flush.
    *   The hole should be angled for better printing.
*   **Pi Dimensions:** The back piece needs to fit an RPi4; it should match the general shape and dimensions of the imported `pi_back.stl` file referenced in the example, but it should be generated programmatically. I can look up specific dimensions if needed, but can we start with just the core case shape and worry about ports later?
*   **No Imported STL's** - I'd like to avoid importing an STL file for the main case shape if possible. I think it'd be more robust and easily customized if this were generated from basic primitives instead.

**General:**

*   All dimensions should be configurable through variables at the top of the file.
*   I'd like to use the `BOSL2` library for any relevant tasks.

Could you help me generate these OpenSCAD files? Thanks so much!

[Assistant]
pi_front_with_fan_v2.scad:
```
//pi_front_with_fan_v2.scad by MegaSaturnv

/////////////////////////////
// Customizable Parameters //
/////////////////////////////
/* [Basic] */
//Diameter of the fan screw holes
FAN_SCREW_HOLE_DIAMETER = 4;
//Width of the fan screw holes mount. Should be a few mm larger than the diameter of the fan screw holes
FAN_SCREW_MOUNT_WIDTH = 8;
//Create extended screw holes for larger fans
EXTEND_SCREW_HOLES = true;
//Length of the extended screw holes
EXTEND_SCREW_HOLES_LENGTH = 26;

/* [Advanced] */

BUMPER_MIN_X = -2;
BUMPER_MIN_Y = -6;
BUMPER_MAX_X = 58;
BUMPER_MAX_Y = 55;
BUMPER_THICKNESS_Z = 4;
PEG_POS_X = 58;
PEG_POS_Y = 49;
FAN_HOLE_DIAMETER = 55;
FAN_SCREW_MOUNT_THICKNESS = BUMPER_THICKNESS_Z/2;
FAN_SCREW_MOUNT_ANGLE_ADJUSTMENT = 0;
FAN_SCREW_MOUNT_EXTENDED_ANGLE_ADJUSTMENT = 50;

/////////////
// Modules //
/////////////
module longFanScrewHole(length, width, thickness, screwWidth) {
	difference() {
		union() {
			cylinder(r=width/2, h=thickness);
			translate([0, -width/2, 0]) cube([length, width, thickness]);

			translate([length, 0, 0]) cylinder(r=width/2, h=thickness);
			//translate([length, -width/2, 0]) cube([width/2, width, thickness]);
		}
		translate([0, 0, -0.1]) cylinder(r=screwWidth/2, h=thickness+0.2);
		translate([0, -screwWidth/2, -0.1]) cube([length, screwWidth, thickness+0.2]);
		translate([length, 0, -0.1]) cylinder(r=screwWidth/2, h=thickness+0.2);
	}
}

////////////////
// Main Model //
////////////////

//Use $fn = 24 if it's a preview. $fn = 96 for the render
$fn = $preview ? 24 : 96;

union() {
	difference() {
		union() {
			import("pi_front.stl");
			translate([BUMPER_MIN_X,BUMPER_MIN_Y,0])
			cube([BUMPER_MAX_X-BUMPER_MIN_X, BUMPER_MAX_Y-BUMPER_MIN_Y, BUMPER_THICKNESS_Z]);
		}
		translate([PEG_POS_X/2, PEG_POS_Y/2, -0.1])
		cylinder(r=FAN_HOLE_DIAMETER/2, h=BUMPER_THICKNESS_Z+0.2);

		if (EXTEND_SCREW_HOLES) {
			for (i = [45, 135, 225, 315]) {
				translate([PEG_POS_X/2, PEG_POS_Y/2, -0.1]) //Translate to centre
				rotate([0, 0, i + FAN_SCREW_MOUNT_ANGLE_ADJUSTMENT]) //Rotate to each 45 degree position
				translate([FAN_HOLE_DIAMETER/2.15, 0, 0]) //Move away from centre along 45 degree angle
				rotate([0, 0, FAN_SCREW_MOUNT_EXTENDED_ANGLE_ADJUSTMENT]) //Adjust the angle at the destination
				translate([-FAN_SCREW_MOUNT_WIDTH/2, -FAN_SCREW_MOUNT_WIDTH/2, 0]) //Translate half a cube width in x and y
				cube([EXTEND_SCREW_HOLES_LENGTH + FAN_SCREW_MOUNT_WIDTH, FAN_SCREW_MOUNT_WIDTH, BUMPER_THICKNESS_Z+0.2]);
			}
		}
	}
	for (i = [45, 135, 225, 315]) {
		if (EXTEND_SCREW_HOLES) {
			difference() {
				union() {
					translate([PEG_POS_X/2, PEG_POS_Y/2, 0])
					rotate([0, 0, i + FAN_SCREW_MOUNT_ANGLE_ADJUSTMENT])
		longFanScrewHole(FAN_HOLE_DIAMETER/2.15, FAN_SCREW_MOUNT_WIDTH, FAN_SCREW_MOUNT_THICKNESS, FAN_SCREW_HOLE_DIAMETER);

					translate([PEG_POS_X/2, PEG_POS_Y/2, 0])
					rotate([0, 0, i + FAN_SCREW_MOUNT_ANGLE_ADJUSTMENT])
					translate([FAN_HOLE_DIAMETER/2.15, 0, 0])
					rotate([0, 0, FAN_SCREW_MOUNT_EXTENDED_ANGLE_ADJUSTMENT])
					longFanScrewHole(EXTEND_SCREW_HOLES_LENGTH, FAN_SCREW_MOUNT_WIDTH, FAN_SCREW_MOUNT_THICKNESS, FAN_SCREW_HOLE_DIAMETER);
				}
				translate([PEG_POS_X/2, PEG_POS_Y/2, -0.1])
				rotate([0, 0, i + FAN_SCREW_MOUNT_ANGLE_ADJUSTMENT])
				translate([FAN_HOLE_DIAMETER/2.15 - FAN_SCREW_MOUNT_WIDTH/2, -FAN_SCREW_HOLE_DIAMETER/2, 0])
				cube([FAN_SCREW_HOLE_DIAMETER*1.5, FAN_SCREW_HOLE_DIAMETER,FAN_SCREW_MOUNT_THICKNESS+0.2]);

				translate([PEG_POS_X/2, PEG_POS_Y/2, -0.1])
				rotate([0, 0, i + FAN_SCREW_MOUNT_ANGLE_ADJUSTMENT])
				translate([FAN_HOLE_DIAMETER/2.15, 0, 0])
				rotate([0, 0, FAN_SCREW_MOUNT_EXTENDED_ANGLE_ADJUSTMENT])
				translate([0, -FAN_SCREW_HOLE_DIAMETER/2, 0])
				cube([FAN_SCREW_HOLE_DIAMETER*1.5, FAN_SCREW_HOLE_DIAMETER,FAN_SCREW_MOUNT_THICKNESS+0.2]);
			}
		} else {
				translate([PEG_POS_X/2, PEG_POS_Y/2, 0])
		rotate([0, 0, i + FAN_SCREW_MOUNT_ANGLE_ADJUSTMENT])
		longFanScrewHole(FAN_HOLE_DIAMETER/2.15, FAN_SCREW_MOUNT_WIDTH, FAN_SCREW_MOUNT_THICKNESS, FAN_SCREW_HOLE_DIAMETER);
		}
	}
}
```
pi_back_with_screw_holes.scad:
```
//pi_back_with_screw_holes.scad by MegaSaturnv

/////////////////////////////
// Customizable Parameters //
/////////////////////////////
/* [Basic] */
//Diameter of the screw holes
SCREW_HOLE_DIAMETER = 3.5;
//Diameter of the screw head
SCREW_HEAD_DIAMETER = 5.25;

/* [Advanced] */
SCREW_HOLE_HEIGHT = 15;
SCREW_HEAD_HEIGHT = 2;
SCREW_HOLE_POS_X = 58;
SCREW_HOLE_POS_Y = 49;

/////////////
// Modules //
/////////////
module screwHole() {
	cylinder(r=SCREW_HOLE_DIAMETER/2, h=SCREW_HOLE_HEIGHT); //gap for screw thread
	cylinder(r=SCREW_HEAD_DIAMETER/2, h=SCREW_HEAD_HEIGHT); //gap for screw head
	translate([0, 0, SCREW_HEAD_HEIGHT]) cylinder(r1=SCREW_HEAD_DIAMETER/2, r2=SCREW_HOLE_DIAMETER/2, h=SCREW_HEAD_HEIGHT/2); //Cone to prevent 90 degree overhanging edges
}

module screwHole2() {
	union() {
		cylinder(r=SCREW_HOLE_DIAMETER/2, h=SCREW_HOLE_HEIGHT); //gap for screw thread
		cylinder(r=SCREW_HEAD_DIAMETER/2, h=SCREW_HEAD_HEIGHT); //gap for screw head
		translate([0, 0, SCREW_HEAD_HEIGHT]) cylinder(r1=SCREW_HEAD_DIAMETER/2, r2=SCREW_HOLE_DIAMETER/2, h=SCREW_HEAD_HEIGHT/2); //Cone to prevent 90 degree overhanging edges
	}
}

////////////////
// Main Model //
////////////////

//Use $fn = 24 if it's a preview. $fn = 96 for the render
$fn = $preview ? 24 : 96;

difference() {
	import("pi_back.stl");

	screwHole();

	translate([SCREW_HOLE_POS_X, 0, 0])
	screwHole();

	translate([0, SCREW_HOLE_POS_Y, 0])
	screwHole();

	translate([SCREW_HOLE_POS_X, SCREW_HOLE_POS_Y, 0])
	screwHole();
}
```


[User]
Hey there! I'm really fascinated by the isoTruss structure I saw in a recent video, and I'd love to be able to generate different versions of it in OpenSCAD. I've got a specific design in mind, but I want it to be parametric so I can easily tweak it later.

I'm basically looking for three different models: a cylindrical isotruss, an isoTruss panel, and just a single pyramid module by itself. I'd like each of these models to be controllable through parameters, including overall size, member thickness, and resolution.

Here’s a more detailed breakdown of what I'm thinking for each:

**Cylindrical isoTruss:**
*   I need to control the inner and outer diameters of the cylinder.
*   The length of the cylinder is important as well.
*   I should be able to specify the number of sides of the cylinder.
*   The diameter of the individual members forming the truss needs to be adjustable.
*   Same for the diameter of the support pieces.

**isoTruss Panel:**
*   I'll need parameters for the overall X, Y, and Z dimensions of the panel.
*   The member and support diameters should also be adjustable.
*   The diameter of the pyramid structures within the panel needs its own parameter.
*   I think it also might be useful to be able to change the number of sides of the pyramids within the panel.

**Single Pyramid Module:**
*   I want to be able to define the base diameter of the pyramid.
*   I also need a parameter for the overall height.
*   And the diameter of the members that make up the structure.
*   Again, being able to specify the number of sides is essential.

For all three structures I'd like:

*   A resolution factor parameter that lets me adjust the `$fn` value. Lower resolution (like 1 or 2) will be great for fast previews, while higher values will give me smoother curves.
*   I’d like to use functions to calculate the internal angles and lengths, so it works if I change the base parameters.

Could you create an OpenSCAD file (or files if you think it would be better) to handle this? I'm not looking to use any specific libraries, I'd rather it all be in vanilla OpenSCAD for now. Thanks!

[Assistant]
isotruss.scad:
```
/*
This is a tool for creating planar and cylindrical models of isotruss structures.

It is licensed under creative commons+attribution license
To fulfill  the attribution requirement, please provide a link back to:
	https://theheadlesssourceman.wordpress.com/2019/06/28/isotruss/

In addition, isoTruss is the property of IsoTruss industries.  For any kind of official use,
they should be contacted!
	IsoTruss industries
	1394 N Freedom Blvd
	Provo, Utah 84604
	Info@IsoTruss.com
	1.385.325.2009
*/

/* [main] */

// Decide what kind of isotruss you want
create=0; // [0:cylindrical_isotruss,1:isotruss_panel,2:single_pyramid]

// resolution 1=low(aka 1x) 2=mid 3=high
resfactor=2;

// diameter of the isotruss members
member_dia=1.5;

// diameter of the supports
support_dia=2.5;

// always 4... but, you know...
num_pyramid_sides=4;

/* [cylinder settings] */

// for cylindrical isotruss
cylindrical_inner_dia=24;

// for cylindrical isotruss
cylindrical_outer_dia=35;

cylinder_length=80;

// traditionally, either 6 or 8
num_cylinder_sides=6;

/* [panel settings] */

panel_x=60;

panel_y=69;

panel_z=15;

panel_pyramid_dia=15;

/* [pyramid only settings] */

pyramid_dia=15;

pyramid_h=10;

/* [hidden] */

// make $fn more automatic
function myfn(r)=max(3*r*resfactor,12);
module cyl(r=undef,h=undef,r1=undef,r2=undef){cylinder(r=r,h=h,r1=r1,r2=r2,$fn=myfn(r!=undef?r:max(r1,r2)));}
module circ(r=undef){circle(r=r,$fn=myfn(r));}
module ball(r=undef){sphere(r=r,$fn=myfn(r));}
module rotExt(r=undef){rotate_extrude(r,$fn=myfn(r)) children();}

function angle_of_polygon_sides(num_sides)=180/num_sides;
function inner_diameter(outer_dia,num_sides)=outer_dia*cos(angle_of_polygon_sides(num_sides)); // aka inradius
function outer_diameter(inner_dia,num_sides)=inner_dia/cos(angle_of_polygon_sides(num_sides)); // aka circumradius
function inner_dia_by_side_length(side_length,num_sides)=side_length/(2*tan(angle_of_polygon_sides(num_sides)));
function side_len_by_inner_dia(inner_dia,num_sides)=inner_dia*tan(angle_of_polygon_sides(num_sides));

// create a pyramid that fits within a given conic volume
module pyramid(member_dia,base_dia,h=undef,nLegs=4){
	h=h==undef?base_dia:h;
	r=base_dia/2;
	mr=member_dia/2;
	leg_len=sqrt(pow(h,2)+pow(base_dia/2,2));
	angle=asin(r/(leg_len-member_dia));
	union() {
		for(a=[0:360/nLegs:359.99]) hull() {
			rotate([0,0,a]) translate([base_dia/2,0,member_dia/2]) ball(r=member_dia/2);
			translate([0,0,h]) ball(r=member_dia/2);
		}
	}
}

// create an isoTruss panel of a given size
// (resulting location is compatible with the cube() function)
//
// Official example image:
//    http://jur.byu.edu/wp-content/uploads/2013/09/a54-300x188.png
module isoTrussPanel(size,member_dia,support_dia=2,pyramid_dia=undef,num_pyramid_sides=4){
	pyramid_dia=pyramid_dia==undef?size[2]:pyramid_dia;
	span=inner_diameter(pyramid_dia,num_pyramid_sides);
	nx=ceil(size[0]/span);
	ny=ceil(size[1]/span);
	for(x=[0:span:size[0]-0.001]){
		for(y=[0:span:size[1]-0.001]){
			translate([x+span/2+member_dia/2,y+span/2+member_dia/2]) rotate([0,0,45]) pyramid(member_dia,pyramid_dia-member_dia/2,nLegs=num_pyramid_sides);
		}
	}
	// x bottom cross-members
	for(x=[0:nx]){
		translate([x*span+support_dia/2,support_dia/2,support_dia/2]) rotate([-90,0,0]) cyl(r=support_dia/2,h=ny*span);
	}
	// y bottom cross-members
	for(y=[0:ny]){
		translate([support_dia/2,y*span+support_dia/2,support_dia/2]) rotate([0,90,0]) cyl(r=support_dia/2,h=nx*span);
	}
	// x top cross-members
	for(x=[0:nx-1]){
		translate([(x+0.5)*span+support_dia/2,span/2+support_dia/2,size[2]-support_dia/2]) rotate([-90,0,0]) cyl(r=support_dia/2,h=(ny-1)*span);
	}
	// y top cross-members
	for(y=[0:ny-1]){
		translate([span/2+support_dia/2,(y+0.5)*span+support_dia/2,size[2]-support_dia/2]) rotate([0,90,0]) cyl(r=support_dia/2,h=(nx-1)*span);
	}
}

// cylindrical isoTruss
// good description here:
//    https://forums.sketchup.com/t/steps-to-make-an-6-node-hexagonal-isotruss/24159/3
module isoTrussCylinder(length,inner_dia,outer_dia,member_dia=1,support_dia=2,num_sides=6,num_pyramid_sides=4){
	inner_dia_id=inner_diameter(inner_dia,num_sides);
	pyramid_dia=outer_diameter(side_len_by_inner_dia(inner_dia,num_sides),num_pyramid_sides);
	span=inner_diameter(pyramid_dia,num_pyramid_sides);
	pyramid_h=(outer_dia-inner_dia)/2;
	nRows=ceil(length/span);
	for(z=[0:span:length-0.001])
	for(a=[0:360/num_sides:359.99]) rotate([0,0,a]) {
		translate([0,inner_dia_id/2,z+span/2]) rotate([-90,0,0]) rotate([0,0,45]) pyramid(member_dia,pyramid_dia,pyramid_h,nLegs=num_pyramid_sides);
	}
	// support posts
	for(a=[0:360/num_sides:359.99]) rotate([0,0,a]) {
		translate([inner_dia/2,0,0]) cyl(r=support_dia/2,h=nRows*span);
	}
	// test cylinder
	if(false)
	color([1,0,0,0.25]) linear_extrude(length) difference(){
		circle(r=outer_dia/2,$fn=num_sides);
		circle(r=inner_dia/2,$fn=num_sides);
	}
}

if(create==0){
	isoTrussCylinder(cylinder_length,cylindrical_inner_dia,cylindrical_outer_dia,member_dia,support_dia,num_cylinder_sides,num_pyramid_sides);
}else if(create==1){
	isoTrussPanel([panel_x,panel_y,panel_z],member_dia,support_dia,panel_pyramid_dia,num_pyramid_sides);
}else if(create==2){
	pyramid(member_dia,pyramid_dia,pyramid_h,num_pyramid_sides);
}
```


[User]
I need an OpenSCAD design for a flower pot support that sits inside a larger vase. The idea is to have a structure that raises a smaller pot to a better height within a larger decorative vase.

The design should be parametric, allowing me to customize the following:

*   **Vase Geometry:**
    *   `vaseDiameter_bot`: The diameter of the vase at the bottom where the support will rest.
    *   `vaseDiameter_top`: The diameter of the vase at the top. This will allow the support to accommodate conical vases.
    *   `vaseHeight`: The height of the vase, used for calculations but may not be visible in the final structure itself.
*   **Support Dimensions:**
    *   `supportHeight`: The height of the support structure.
    *   `wallThickness`: The thickness of the support walls.
*   **Support Parameters:**
    *   `nRadials`: The number of radial walls/spokes in the support.
    *   `nInnerCircles`: The number of concentric circular walls.
    *   `outerCircle`: A boolean to specify whether to have an outer circle.
    *   `holesInWalls`: A boolean specifying whether to create holes in the walls to save material.
    *   `holesHeightRatio`: Ratio of supportHeight for hole height, e.g., 0.75 means 75% of the support height
    *   `holesWidthRatio`:  Ratio of the radial or circular length where the hole will be created, e.g., 0.75
    *    `maxHoleRatio`: Max ratio between hole width and hole height to limit the shape, e.g., 0.75
*   `zScale`: Calculated but exposed for potential manipulation (it will use the vase dimensions to calculate the scaling factor for conical vases).

The design should use linear extrusions and rotations to create the radial walls and concentric circles, with the option for holes in the walls for weight saving. It should be able to handle non-zero number of inner circles (so 0, 1, 2 etc) and outer circle.

Could you create this as an OpenSCAD file? It would also be useful if it's commented well, so I can understand what each part does. Please don't assume I have existing libraries, I'd prefer to have all the code in a single file.

[Assistant]
Flowerpot_inner_support.scad:
```
/* [Vase geometry] */
vaseDiameter_bot = 95;
vaseDiameter_top = 95;
vaseHeight = 100;

/* [Support dimensions] */
supportHeight = 20;
wallThickness = .8;

/* [Support parameters] */
nRadials = 6;
nInnerCircles = 1;
outerCircle = true;
holesInWalls = true;
holesHeightRatio = 0.75;
holesWidthRatio = 0.75;
maxHoleRatio = 0.75;

zScale = 1+(vaseDiameter_top-vaseDiameter_bot)/vaseDiameter_bot*supportHeight/vaseHeight;

/* [Hidden] */
$fa = 5; // increase to speed up the computation (and end up with a rougher model)

//r = vaseDiameter_bot/2;
//echo(n=($fn>0?($fn>=3?$fn:3):ceil(max(min(360/$fa,r*2*PI/$fs),5))),a_based=360/$fa,s_based=r*2*PI/$fs);

// Straight walls
for (i = [1:nRadials]) {
    difference() {
        linear_extrude(height=supportHeight, scale=[zScale, zScale])  rotate([0, 0, i*360/nRadials]) translate([0, -wallThickness/2]) square([vaseDiameter_bot/2, wallThickness]);
        for (j = [1:(nInnerCircles+1)]) {
            if (holesInWalls) {
                wHole = holesWidthRatio*vaseDiameter_bot/2/(nInnerCircles+1);
                hHole = holesHeightRatio*supportHeight;
                nHoles = (wHole/hHole > maxHoleRatio) ? ceil(wHole/hHole/maxHoleRatio) : 1;

                wHoleA = wHole/nHoles;

                for (k = [1:nHoles]) {
                    rotate([0, 0, i*360/nRadials])
                    translate([vaseDiameter_bot/2/(nInnerCircles+1)*((j-1)+(k-0.5)/nHoles), 0, supportHeight/2])
                    rotate([90, 0, 0])
                    scale([wHoleA/20, hHole/20, 1])
                    translate([0, 0, -wallThickness])
                    cylinder(h=wallThickness*2, r=10);
                }
            }
        }
    }
}

// Concentric circles
if (nInnerCircles > 0) {
    nOuterCircle = (outerCircle == true) ? 1 : 0;
    for (i = [1:nInnerCircles + nOuterCircle]) {
        difference () {
            linear_extrude(height=supportHeight, scale=[zScale, zScale]) difference() {
            circle(d=vaseDiameter_bot*i/(nInnerCircles+1)+wallThickness);
            circle(d=vaseDiameter_bot*i/(nInnerCircles+1)-wallThickness);}

            if (holesInWalls) {
                for (j = [1:nRadials]) {
                //for (j = [1:1]) {
                    d_loc = vaseDiameter_bot*i/(nInnerCircles+1);
                    wHole = sin(360*holesWidthRatio/nRadials/2)*d_loc;
                    hHole = holesHeightRatio*supportHeight;
                    nHoles = (wHole/hHole > maxHoleRatio) ? ceil(wHole/hHole/maxHoleRatio) : 1;

                    wHoleA = sin(360*holesWidthRatio/nRadials/2/nHoles)*d_loc;
                    for (k = [1:nHoles]) {
                        translate([0, 0, supportHeight/2]) rotate([0, 0, 90 + j*360/nRadials + (k-0.5)*360/(nRadials*nHoles) ]) rotate([90, 0, 0]) scale([wHoleA/20, hHole/20, 1]) cylinder(h=vaseDiameter_bot, r=10);
                    }
                }
            }
        }
    }
}
```


[User]
Hey, I'm looking to get some custom Bowden tube clips designed, and I'd like to be able to adjust all the dimensions easily. I found a basic design that does most of what I want, but I'd like to have the whole thing parametric so I can tweak it just right.

Here's the basic idea: the clip has a ring that goes around the tube, and a little vertical tab that holds it in place.

**The Ring:**
*   I want to be able to set the thickness of the ring itself.
*   I need to set the inner diameter of the ring (the size of the tube).
*   The outer diameter also needs to be adjustable.
*   There should be a gap cut out of the ring, so it's not a full circle, and I need to be able to specify the width of that gap.

**The Tab:**
*   The tab has a width. I need to adjust that.
*   It also has a height that I need to specify.
*   And a thickness that I want to be able to control.
*   I also need to be able to set the distance (offset) between the vertical tab and the ring.

I'd also like to be able to specify how many clips to render at once in a row.

It would be great if you could create this using OpenSCAD. I don't really have any preference for libraries, whatever you think is best is fine by me. I just want to be able to generate a bunch of clips with the right dimensions.

[Assistant]
bowden_clips.scad:
```
// 3D printer Bowden clip customizer.

// How many clips to print.
count = 3;
// Clip's thickness
ring_thickness = 1.8;
// Inner diameter of the clip
ring_id = 7;
// Outer diameter of the clip
ring_od = 11;
// Width of the clip's opening
ring_cut_width = 5.5;
// Width of the vertical tab.
tab_width = 5.8;
// Height of the vertical tab.
tab_height = 1.5;
// Thickness of the vertical tab.
tab_thickness = 1.6;
// Controls the distance between the vertical tab and the ring..
tab_offset = 0;

/* [Hidden] */

$fn = 64;
eps = 0.01;

module bowden_clip_tab() {
  ring_width = (ring_od - ring_id)/2;
  base_length = ring_width + tab_offset + tab_thickness;
  translate([-base_length-ring_id/2, -tab_width/2, 0])
    cube([base_length, tab_width, ring_thickness]);
  translate([-ring_od/2-tab_offset-tab_thickness, -tab_width/2, 0])
    cube([tab_thickness, tab_width, ring_thickness+tab_height]);

}

module bowden_clip_ring() {
  difference() {
    cylinder(d=ring_od, h=ring_thickness);
    translate([0, 0, -eps])
      cylinder(d=ring_id, h=ring_thickness+2*eps);
    translate([0, -ring_cut_width/2, -eps])
      cube([ring_od/2+eps, ring_cut_width, ring_thickness+2*eps]);
  }
}

module bowden_clip() {
  bowden_clip_ring();
  bowden_clip_tab();
}

for (i = [0 : count-1]) {
  translate([i*(ring_od + 3), 0, 0]) rotate([0, 0, -90]) bowden_clip();
}

```


[User]
I need an OpenSCAD design for a PCB holder, kind of like a bracket, with some adjustable parameters. I’ve got a few specific requirements, so let me break it down:

First, the holder needs two main parts: one to hold the PCB and one that acts as the base for mounting. The PCB side will have mounting holes and optionally standoffs. The base will also have mounting holes.

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

*   **PCB Length:** The length of the PCB side of the bracket.
*   **PCB Mounting Hole Pitch:** The distance between the centers of the mounting holes on the PCB.
*   **PCB Mounting Hole Diameter:** The diameter of the PCB mounting holes.
*   **PCB Offset:**  How far the PCB is offset from the edge of its side of the bracket
*   **PCB Spacer Thickness:** The thickness of the spacers/standoffs under the PCB. Set to zero for no standoffs.
*   **PCB Spacer Diameter:** The diameter of the PCB standoffs
*    **PCB Angle:** The angle at which the PCB is held relative to the base part (0 degrees would be a right angle, 90 degrees would be parallel to the base).
*   **Base Length:** The length of the base side of the bracket.
*   **Base Mounting Hole Pitch:** The distance between the centers of the mounting holes on the base.
*   **Base Mounting Hole Diameter:** The diameter of the base mounting holes.
*    **Base Mounting Hole Offset:** How far the mounting holes are offset from the end of the base.
*   **Holder Width:** The width of the holder (all parts, including the mounting flanges).
*   **Holder Thickness:** The thickness of the holder material.

I'd like the base and PCB parts to have flanges with cylindrical reinforcements at their ends (perpendicular to the main face of the part) where they're joined. Then, there should be a curved hull between the two parts to connect them and provide some reinforcement at the joint.

Finally, I'd like to be able to set the `$fn` variable to control the mesh resolution.

I don't have any existing code to share for this. Could you generate a parametric OpenSCAD file for me? I don't need any fancy libraries here, just the basic OpenSCAD functions.

[Assistant]
pcb_holder.scad:
```

// quality
$fn=25;

// length of PCB side of bracket
pcbLength = 85;

// dimension between mounting holes on PCB
pcbHolesPitch = 76.2;

// diameter of PCB mounting holes
pcbHolesDia = 3.2;

// PCB offset from botom
pcbOffset = 20;

// PCB spacer thickness
pcbDistance = 3.5;

// PCB spacer diameter
pcbDistanceDia = 8;

// angle of PCB (0...right angle, 90...horizontal)
pcbAngle = 35;

// length of clamping side of bracket
bottomLength = 60;

// dimension between mounting holes
bottomHolesPitch = 50;

// mounting holes diameter
bottomHolesDia = 5;

// mounting holes offset
bottomHolesOffset = 10;

// width of holder
width = 12;

// holder thickness
thickness = 4;

module pcbPart() {
  union() {
    difference() {
      union() {
        cube([pcbLength+pcbOffset,width,thickness], center=true);
        if (pcbDistance > 0) {
          translate([-pcbHolesPitch/2+pcbOffset/2,0,pcbDistance]) cylinder (d=pcbDistanceDia, h=pcbDistance, center=true);
          translate([pcbHolesPitch/2+pcbOffset/2,0,pcbDistance]) cylinder (d=pcbDistanceDia, h=pcbDistance, center=true);
        }
      }

      translate([-pcbHolesPitch/2+pcbOffset/2,0,0]) cylinder (d=pcbHolesDia, h=100, center=true);
      translate([pcbHolesPitch/2+pcbOffset/2,0,0]) cylinder (d=pcbHolesDia, h=100, center=true);
    }

    translate([-(pcbLength+pcbOffset)/2,0,0])
    rotate([90,90,0])
    cylinder (d=thickness, h=width, center=true);

    translate([(pcbLength+pcbOffset)/2,0,0])
    rotate([90,90,0])
    cylinder (d=thickness, h=width, center=true);
  }
}

module bottomPart() {
  union() {
    difference() {
      cube([bottomLength+bottomHolesOffset,width,thickness], center=true);
      translate([-bottomHolesPitch/2+bottomHolesOffset/2,0,0]) cylinder (d=bottomHolesDia, h=100, center=true);
      translate([bottomHolesPitch/2+bottomHolesOffset/2,0,0]) cylinder (d=bottomHolesDia, h=100, center=true);
    }

    translate([-(bottomLength+bottomHolesOffset)/2,0,0])
    rotate([90,90,0])
    cylinder (d=thickness, h=width, center=true);

    translate([(bottomLength+bottomHolesOffset)/2,0,0])
    rotate([90,90,0])
    cylinder (d=thickness, h=width, center=true);
  }
}

module reinforcement() {
  hull() {
    translate([(bottomLength+bottomHolesOffset)/1.5,0,0])
    rotate([90,90,0])
    cylinder (d=thickness, h=width, center=true);

    rotate([0,-90+pcbAngle,0])
    translate([(pcbLength+pcbOffset)/1.5,0,0])
    rotate([90,90,0])
    cylinder (d=thickness, h=width, center=true);
  }
}

module holder() {
  union() {
    rotate([0,-90+pcbAngle,0])
    translate([(pcbLength+pcbOffset)/2,0,0])
    pcbPart();

    reinforcement();

    translate([(bottomLength+bottomHolesOffset)/2,0,0])
    bottomPart();
  }
}

holder();

```


[User]
I'm looking for a parametric phone stand design that I can customize using OpenSCAD. I'd like it to be able to generate two separate STL files: one for the full stand and another for a fit test. The test piece should be a simplified version of the phone cradle, designed to let me check the dimensions of my phone against the design before printing the full thing.

My phone is a ZTE Blade Spark, and the stand I'm currently using has the following measurements:

*   **Phone Width:** 77.7 mm
*   **Phone Thickness:** 9.7 mm
*   **USB-C Center from Left Edge:** 38.85 mm
*   **USB-C Offset from Center (Front to Back):** 0 mm (though this needs to be adjustable)
*   **USB-C Connector Shell Width:** 12.7 mm
*   **USB-C Connector Shell Thickness:** 6.35 mm
*   **USB-C Connector Shell Height (including strain relief):** 31.75 mm
*   **USB Cable Diameter:** 4.75 mm
*   **Cradle Height (full stand):** 50 mm
*   **Cradle Height (fit test):** 20 mm

The full stand has a tilted base, and it needs to include a cutout for the USB-C connector and cable. The fit test piece just needs to have the same inner dimensions as the cradle of the full stand and a cutout to check the USB-C port fit.

Could you generate the necessary OpenSCAD code to achieve this, including all of the customizer variables? I'd like to be able to control all of those dimensions. Also, I'd need to be able to specify whether to generate the full stand, the test piece, or both. I don't need any complex libraries, just basic OpenSCAD primitives should be enough.

[Assistant]
CustomizablePhoneStand.scad:
```
//Variables

//Print the Stand, the Fit test or Both?
part = "Stand"; // [Stand:Full Stand,Test:Fit Test,Both:Print Both]

//All measurements in milimeters
//Width of the phone/tablet
width = 77.7;
//Thickness of the phone/tablet
thick = 9.7;
//Center of the USB jack from left
usbc = 38.85;
//Adjust USB +/- from center, front to back
usboff = 0;
//Width of USB connector shell
usbx = 12.7;
//Thickness of USB connector shell
usby = 6.35;
//Height of USB connector shell, including strain relief
usbz = 31.75;
//Diameter of USB cable
usbd = 4.75;
//Height of the cradle around the phone/tablet (for finished Stand only)
height = 50;
//Total Height of the TEST cradle (for fit test only)
theight = 20;

print_part();

module print_part() {
    if (part == "Stand"){
        stand();
    }else if (part == "Test"){
        test();
    }else if (part == "Both"){
        stand();
        test();
    }
}
//
module stand(){
difference(){
union(){
    rotate([-15,0,0])
        translate([0,-2.6,10])
            cube([width+8,thick+10,height+usbz-5]);
    cube([width+8,(usbz/10)+height,10.4]);
}
rotate([-15,0,0]){
    union(){
        translate([4,2,usbz+5])
            cube([width,thick,height+1]);
        translate([6,-thick,usbz+5])
            cube([width-4,thick+10,height+1]);
        translate([4+usbc-(usbx/2),2+(thick/2)-(usby/2)+usboff,5])
            cube([usbx,usby,usbz+1]);
    }
}
translate([4+usbc-(usbd/2),usboff+10,5.75-usbd])
    cube([usbd,(usbz/2)+height,usbd]);
translate([4.5+usbc-(usbd/2),usboff+10,-1])
    cube([usbd-1,(usbz/2)+height,usbd]);
translate([usbc-usbx/2+4,usboff+0.2,0])
    rotate([-15,0,0])
        cube([usbx,15,10]);
}}

module test(){
difference(){
    union(){
        cube([width+2,thick+2,theight+2]);
    }
    union(){
        translate([1,1,1])
            cube([width,thick,100]);
        translate([1+usbc-(usbx/2),1+(thick/2)-(usby/2)+usboff,-1])
            cube([usbx,usby,20]);
    }
}}
```


[User]
Hey, I need some help designing an ammo can tag. I've got the basic concept down, but I need it to be parametric so I can adjust it for different sized cans, and I'm not that great at OpenSCAD.

Basically, it's a rectangular tag that clips onto the latch of an ammo can. It needs to have a text label on the front, and two arms that extend inward and hook onto the latch. The arms need a little tab at the back end to help hold them in place.

Here's a breakdown of the design I have in mind, along with some default dimensions that I use for the MTM 30 cal cans:

*   **Tag Body:** This is the main rectangular part of the tag.
    *   `TAG_OUTSIDE_WIDTH`:  Default 63.5mm
    *   `TAG_OUTSIDE_HEIGHT`: Default 13mm
    *   `TAG_OUTSIDE_THICKNESS`: Default 3mm
*   **Text Label:**
    *   `TAG_TEXT`: The text to be displayed, default "22 LR"
    *   `TEXT_HEIGHT`: The extrusion height of the text, default 1mm.
    *   `TEXT_FONT_SIZE`: Default 10
    *   `TEXT_FONT`: Default "Liberation Sans"
*   **Inward Arms:** These extend from the sides of the tag.
    *   `INWARD_ARM_THICKNESS`: Default 1mm
    *  `INWARD_ARM_DEPTH`: Default 3.5mm
*   **Backside Tabs:** These are on the back of the inward arms and hook onto the latch.
    *   `BACKSIDE_TAB_THINCKNESS`: Default 1.5mm
    *   `BACKSIDE_TAB_DEPTH`: Default 2mm
    *   `BACKSIDE_TAB_GRIP_DEPTH`: Default 1mm (this is how far the tab extends back toward the tag body along the arm).

I'd like to be able to adjust all of those parameters. Could you generate the OpenSCAD code for me? I'd also like the code to use the `BOSL2` library. Thanks!

[Assistant]
Can_Tag.scad:
```
cantag();
//BEGIN VARIABLES
TAG_TEXT="22 LR";
TEXT_HEIGHT=1;
TEXT_FONT_SIZE=10;
TEXT_FONT="Liberation Sans";
TAG_OUTSIDE_THICKNESS=3;
TAG_OUTSIDE_WIDTH=63.5;
TAG_OUTSIDE_HEIGHT=13;
INWARD_ARM_THICKNESS=1;
INWARD_ARM_DEPTH=3.5;
BACKSIDE_TAB_THINCKNESS=1.5;
BACKSIDE_TAB_DEPTH=2;
BACKSIDE_TAB_GRIP_DEPTH=1;

module cantag(){
rotate([90,0,180]){
//Text
    union(){

    translate([TAG_OUTSIDE_WIDTH/2,TAG_OUTSIDE_HEIGHT/2,-TEXT_HEIGHT]){
    mirror([1,0,0])
    color("blue")
        linear_extrude(height=TEXT_HEIGHT, center=false)
    text(str(TAG_TEXT),size = TEXT_FONT_SIZE, font = TEXT_FONT, valign="center", halign="center");
    }

//Base Tag
color("red")
linear_extrude(height=TAG_OUTSIDE_THICKNESS, center=false)
square([TAG_OUTSIDE_WIDTH,TAG_OUTSIDE_HEIGHT]);

//ARM 1
color("lime", 1.0 )
linear_extrude(height=INWARD_ARM_DEPTH+TAG_OUTSIDE_THICKNESS, center=false)
translate([TAG_OUTSIDE_WIDTH,0,0])
square([INWARD_ARM_THICKNESS,TAG_OUTSIDE_HEIGHT]);

//ARM2
color("lime", 1.0 )
linear_extrude(height=INWARD_ARM_DEPTH+TAG_OUTSIDE_THICKNESS, center=false)
translate([-INWARD_ARM_THICKNESS,0,0])
color("lime", 1.0 )
square([INWARD_ARM_THICKNESS,TAG_OUTSIDE_HEIGHT]);

//Backside Tab 1
color("yellow")
translate([-INWARD_ARM_THICKNESS,0,INWARD_ARM_DEPTH+TAG_OUTSIDE_THICKNESS+BACKSIDE_TAB_THINCKNESS])
rotate([-90,0,0])
linear_extrude(height=TAG_OUTSIDE_HEIGHT,center=false)
polygon(points=[[0,0],[0,BACKSIDE_TAB_THINCKNESS],[INWARD_ARM_THICKNESS+BACKSIDE_TAB_GRIP_DEPTH,BACKSIDE_TAB_THINCKNESS],[BACKSIDE_TAB_DEPTH+INWARD_ARM_THICKNESS,BACKSIDE_TAB_THINCKNESS * 0.5]]);

//Backside Tab 2
color("yellow")
translate([TAG_OUTSIDE_WIDTH+INWARD_ARM_THICKNESS,TAG_OUTSIDE_HEIGHT,INWARD_ARM_DEPTH+TAG_OUTSIDE_THICKNESS+BACKSIDE_TAB_THINCKNESS])
rotate([-90,0,180])
mirror([0,0,0])
linear_extrude(height=TAG_OUTSIDE_HEIGHT,center=false)
polygon(points=[[0,0],[0,BACKSIDE_TAB_THINCKNESS],[INWARD_ARM_THICKNESS+BACKSIDE_TAB_GRIP_DEPTH,BACKSIDE_TAB_THINCKNESS],[BACKSIDE_TAB_DEPTH+INWARD_ARM_THICKNESS,BACKSIDE_TAB_THINCKNESS * 0.5]]);
}}
}

```