[User]
Hi, I'm looking to design a nozzle wiper for my dual extrusion 3D printer, and I'd like to use OpenSCAD. I've seen a few designs, but I need one that I can customize easily, so I'd prefer to use parameters.

Essentially, I need a rectangular box with a groove in it. The box will be the base, and the groove will hold a rubber strip that the nozzles will wipe against.

Here are the basic parameters I think I'll need:

*   `width`: Overall width of the box
*   `depth`: Overall depth of the box
*   `height`: Overall height of the box
*   `wallThickness`: Thickness of the box walls
*   `gap`: The width of the groove that will hold the rubber strip
*   `base`:  Height of the base below the main body of the box (for extra stability)

I'd like the design to include a base below the main wiper body. The base should extend outwards the same width and depth of the wiper body, but extend below it by the amount specified by the base parameter.

The main body of the wiper should have a "wall" around the edge and an internal wall to define the groove. The outer wall should be defined by the `wallThickness`, and the inner wall should define the groove using the `gap` parameter. The wiper should have a rectangular shape overall.

Could you generate an OpenSCAD file for this? I'm not using any libraries beyond the standard ones, so I don't think you need to worry about external dependencies. Let me know if anything isn't clear.

[Assistant]
wiper.scad:
```
// Custom Wiper Box by Matt Johnson
// intentional3D
// Use this to customize your own nozzle wiper for multi extruding printers.

//

width = 110;
depth = 110;
height = 10;
wallThickness = 1;
gap=1;
base=10;

gapThickness = gap+1;

base();

module base()
    {
        union()
        {
                 //base
                difference()
                {
                    translate([-(width)/2, -(depth)/2, -height-base])
                    {

                        cube([width,depth,height+base]);
                    }

                translate([(width-2*gapThickness-2*wallThickness)/-2,(depth-2*gapThickness-2*wallThickness)/-2,-50])
                    {
                        cube([(width-2*gapThickness-2*wallThickness),(depth-2*gapThickness-2*wallThickness),100]);
                    }

                }
            // Outer Wall
            difference()
            {
                translate([-width/2, -depth/2, 0])
                {
                    cube([width,depth,height]);
                }

                translate([(-width/2) + wallThickness, -depth/2 + wallThickness, -50])
                {
                    cube([width - (wallThickness * 2), depth - (wallThickness * 2), 100]);
                }

            }
            // inner wall
                difference()
                {
                    translate([-(width-2*gapThickness)/2, -(depth-2*gapThickness)/2, 0])
                    {

                        cube([width-2*gapThickness,depth-2*gapThickness,height]);
                    }

                translate([(width-2*gapThickness-2*wallThickness)/-2,(depth-2*gapThickness-2*wallThickness)/-2,-height])
                    {
                        cube([(width-2*gapThickness-2*wallThickness),(depth-2*gapThickness-2*wallThickness),100]);
                    }

                }

            }
        }
```


[User]
I want to design a box to hold 3D printer nozzles, and I'd like it to be customizable. It should have multiple rows and columns of threaded holes for the nozzles, with optional labels for each row and a lid.

Specifically, the base of the box should have these configurable parameters:
*   **Height:** How tall the base is.
*   **Columns:** The number of columns of holes.
*   **Rows:** The number of rows of holes.
*   **Spacing:** Distance between the centers of the holes.
*   **Text Width:** Width of the text labels on the left of each row. If 0, no text labels.
*   **Text Height:** Height of the text labels on the left of each row. If 0, no text labels.
*   **Text Labels:** The actual text for each row, separated by semicolons. If empty, no text.
*  **Hole Diameter:** The size of the holes, which should correspond to standard nozzle sizes like M4, M5, M6, M8, and M10.
*   **Hole Depth:** How deep the holes are.
*   **Solid:** A boolean to determine if the box is solid or hollow, where hollow should be a shell with some bottom thickness and a thicker wall around the top for threads.

The lid should have these configurable parameters:
*   **Enable Lid:** A boolean to indicate whether a lid should be generated.
*   **Lid Height:** Height of the lid.
*   **Lid Text Width:** Width of the text on the top of the lid. If 0, no text.
*  **Lid Text Height:** Height of the text on the top of the lid. If 0, no text.
*   **Lid Text:** The text to display on the lid. If empty, no text.

There should also be global parameters:
*   **Tolerance:** To adjust for printing tolerances, so holes can be made a little larger than their nominal size.
*   **Wall Thickness:** The thickness of the box's walls.
*   **Render Quality:** For round objects. Use the `$fn` parameter.

The thread itself should be parametric, so the pitch can be adjusted based on the hole diameter, using these standard pitches for the M4-M10 sizes mentioned previously. Please create the threads using the included `threads.scad` library. The `string.scad` library would also be helpful for manipulating the text strings. Make sure the threads are properly truncated and sized, and that the internal threads are cut from a solid block. The lid should mount using mounting points with corresponding holes, also parametric.

[Assistant]
nozzles_box2.scad:
```
// Author: GrAndAG

/* [Render] */
// Preview and render mode (select parts to make)
mode = 3; // [1:Bottom part only, 2: Lid only, 3: Bottom part + Lid, 4: Assembled view]

/* [Bottom part] */
// Height of bottom part (mm)
height = 8; // [8:25]
// Number of columns of holes
columns = 3; // [1:20]
// Number of rows of holes
rows = 2; // [1:20]
// Spacing between holes (mm)
spacing = 8; // [4:20]
// Width of text labels on the left of each row (if 0 -> no-text)
text_width = 8; // [2:50]
// Height of text labels on the left of each row (if 0 -> no-text)
text_height = 6; // [2:20]
// Labels on the left of each row, separated by semicolon ';' (empty -> no-text)
text = ".4;.5";
// Holes size
hole_diameter = 6; // [4:M4, 5:M5, 6:M6, 8:M8, 10:M10]
// Holes depth (mm)
hole_depth = 6; // [4:15]
// Make bottom part soli or hollow
solid = 0;  // [1:Yes, 0:No]

/* [Lid] */
// Enable lid generation
has_lid = 1; // [1:Yes, 2:No]
// Height of lid (mm)
lid_height = 10; // [6:25]
// Width of text on the lid top (if 0 -> no-text)
lid_text_width = 45; // [20:80]
// Height of text on the lid top (if 0 -> no-text)
lid_text_height = 11; // [2:20]
// Text on the lid top (empty -> no-text)
lid_text = "Nozzles";

/* [Misc] */
// Increase this value if holes are to tight
tolerance=0.5; // [-0.5:0.1:1.5]
// Thickness of walls (mm)
wall_thickness = 1.5; // [1.0:0.1:4.0]
// Render quality of round objects
$fn=64;

/* [Hidden] */
round_corners = 1.5;
text_embossing = 0.4;
eps = 0.05;
spacing_threshold_l = 6;
spacing_threshold_w = hole_diameter-2;

lid_mount_width = 2;

lid_mount_d = 6;
lid_mount_shaft_d = 1.75+0.1;

//        M4    M5    M6   x   M8   x   M10
pitches=[0.70, 0.80, 1.00, 0, 1.25, 0, 1.50];

//use <../lib/string.scad>
function substr(data, i, length=0) = (length == 0) ? _substr(data, i, len(data)) : _substr(data, i, length+i);
function _substr(str, i, j, out="") = (i==j) ? out : str(str[i], _substr(str, i+1, j, out));
function getsplit(str, index=0, char=" ") = (index==0) ? substr(str, 0, search(char, str)[0]) : getsplit(   substr(str, search(char, str)[0]+1)   , index-1, char);

//use <../lib/threads.scad>
function segments (diameter) = min (50, ceil (diameter*6));
module metric_thread (diameter=8, pitch=1, length=1, internal=false, n_starts=1,
                      thread_size=-1, groove=false, square=false, rectangle=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 * cos (30);

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

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

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

   difference () {

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

         // External thread.
         cylinder (r=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);
      }
   }
}

// ----------------------------------------------------------------------------
module metric_thread_turns (diameter, pitch, length, internal, n_starts,
                            thread_size, groove, square, rectangle)
{
   // 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);
         }
      }

      // 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)
{
   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]) {
            thread_polyhedron (diameter/2, pitch, internal, n_starts,
                               thread_size, groove, square, rectangle);
         }
      }
   }
}

// ----------------------------------------------------------------------------
// z (see diagram) as function of current radius.
// (Only good for first half-pitch.)
function z_fct (current_radius, radius, pitch)
   = 0.5* (current_radius - (radius - 0.875*pitch*cos (30)))
                                                       /cos (30);

// ----------------------------------------------------------------------------
module thread_polyhedron (radius, pitch, internal, n_starts, thread_size,
                          groove, square, rectangle)
{
   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 * cos (30);
   // DKTMP - check
   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 * 1.005;
   x_incr_inner = (! groove ? inner_r : outer_r) * fraction_circle * 2 * PI * 1.005;
   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 = z_fct (outer_r, radius, thread_size);
   //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
                        ]
            );
         }
      }
   }
}

module main() {
height = (height < hole_depth+wall_thickness*2) ? hole_depth+wall_thickness*2 : height;
thread_diameter = hole_diameter + 0.3 + tolerance;
thread_pitch = pitches[hole_diameter - 4];

text_fixed = str(text, ";;;;;;;;;;;;;;;;;;;;");
text_width_to_add = (text_width <= spacing/2-wall_thickness) ? 0 : text_width - spacing/2+wall_thickness ;

add_left  = (!has_lid) ? 0 : (text_width_to_add+spacing/2 >= spacing_threshold_l) ? 0 : spacing_threshold_l - text_width_to_add - spacing/2;
add_right = (!has_lid) ? 0 : (spacing/2 >= spacing_threshold_l) ? 0 : spacing_threshold_l - spacing/2;
add_top   = (!has_lid) ? 0 : (spacing/2 >= spacing_threshold_w) ? 0 : spacing_threshold_w - spacing/2;

length = add_left+text_width_to_add + columns * (thread_diameter + spacing) + wall_thickness*2 + add_right;
width = add_top+rows * (thread_diameter + spacing) + wall_thickness*2;

lid_mount_offset_r = length-wall_thickness*2.5;
lid_mount_offset_l = wall_thickness*2.5;
lid_mount_hole_d = lid_mount_d+tolerance*2;
lid_mount_hole_w = lid_mount_width+tolerance*1.5;

module lid_mount_hole(add=0, shaft=false, hole=false) {
    difference() {
        d = (hole) ? lid_mount_d : lid_mount_hole_d+add;
        w = (hole) ? lid_mount_width : lid_mount_hole_w+add;
        s = d/2*sin(30)+d;
        union() {
            hull() {
                cylinder(d=d, h=w, center=true);
                translate([d/2+eps/2,(d-s)/2,0])
                    cube([eps, s, w], center=true);
                if (!hole)
                    translate([0,d/2+eps/2,0])
                        cube([d, eps, w], center=true);
            }
            if (shaft)
                cylinder(d=lid_mount_shaft_d, h=lid_mount_hole_w+wall_thickness*1.5+eps, center=true);
        }
        if (hole)
            cylinder(d=lid_mount_shaft_d+tolerance*0.7, h=lid_mount_hole_w+eps, center=true);
        if (add > 0) {
            translate([lid_mount_hole_d/2+eps/2,(d-s+eps)/2,0])
                cube([add+eps, s+eps, w], center=true);
            translate([0,lid_mount_hole_d/2+eps/2,0])
                cube([d, add+eps, w], center=true);
        }
    }
}

module holder() {

    f = 0.6;

    module holder_part() {
        size = thread_diameter + spacing;

        full_hole_depth = hole_depth+wall_thickness*2;
        difference() {
            if (solid) {
                cube([size, size, height]);
            } else {
                union() {
                    translate([0, 0, height - wall_thickness])
                        cube([size, size, wall_thickness]);
                    // make additional cylinders for threads
                    translate([size/2, size/2, height - full_hole_depth])
                        cylinder(d=thread_diameter+0.5+wall_thickness*2, h=full_hole_depth);
                }
            }
            // thread
            translate([size/2, size/2, 0]) {
                translate([0, 0 ,height-f+eps/2])
                    cylinder(d1=thread_diameter, d2=thread_diameter+f*2+eps/2, h=f+eps/2);
                translate([0, 0 ,height-thread_pitch*2])
                    cylinder(d1=thread_diameter-thread_pitch*2*0.89, d2=thread_diameter, h=thread_pitch*2);
                translate([0, 0 ,height-f-thread_pitch*4])
                    metric_thread (internal=true, diameter=thread_diameter, pitch=thread_pitch, length=thread_pitch*4+eps/2);
                translate([0, 0 ,height - full_hole_depth -eps/2])
                    cylinder(d=thread_diameter+0.5, h=full_hole_depth - thread_pitch*4 + eps/2);
            }
        }
        // bottom
        translate([size/2, size/2, height - full_hole_depth])
            cylinder(d=thread_diameter+0.5+wall_thickness*2, h=wall_thickness);
    }

    difference() {
        union() {
            difference() {
                translate([round_corners/2, round_corners/2, 0])
                    minkowski() {
                        cube([length - round_corners, width - round_corners, height-1]);
                        cylinder(d=round_corners, h=1);
                    }
                if (!solid) {
                    translate([round_corners/2 + wall_thickness, round_corners/2 + wall_thickness, -eps/2])
                        minkowski() {
                            cube([length - round_corners - wall_thickness*2, width - round_corners - wall_thickness*2, height - 1 + eps]);
                            cylinder(d=round_corners, h=1);
                        }
                }
            }

            // add some space fot text labels and fill top/left/right gaps
            if (text_width > 0 && text_height > 0 && len(text) > 0 && text_width_to_add > 0) {
                if (solid) {
                    translate([wall_thickness, 0, 0])
                        cube([text_width_to_add+add_left, width, height]);
                    translate([add_left+text_width_to_add + wall_thickness+columns*(spacing+thread_diameter), 0, 0])
                        cube([add_right, width, height]);
                    translate([wall_thickness, width-wall_thickness-add_top, 0])
                        cube([length-wall_thickness*2, add_top, height]);
                } else {
                    translate([wall_thickness, 0, height - wall_thickness])
                        cube([text_width_to_add+add_left, width, wall_thickness]);
                    translate([add_left+text_width_to_add + wall_thickness+columns*(spacing+thread_diameter), 0, height - wall_thickness])
                        cube([add_right, width, wall_thickness]);
                    translate([wall_thickness, width-wall_thickness-add_top, height - wall_thickness])
                        cube([length-wall_thickness*2, add_top, wall_thickness]);
                }
            }
            for(r=[0:1:rows-1]) {
                for(c=[0:1:columns-1])
                    translate([add_left+text_width_to_add + wall_thickness+c*(spacing+thread_diameter), wall_thickness+r*(spacing+thread_diameter), 0])
                        //render()
                            holder_part();
            }
            if (has_lid && !solid) {
                // add placeholder for holes of lid mounts
                translate([lid_mount_offset_r, width-lid_mount_hole_d/2, height-lid_mount_hole_d/2])
                    rotate([0,-90,0]) lid_mount_hole(add=wall_thickness*2);
                    //cube([lid_mount_hole_w+wall_thickness*2, lid_mount_hole_d+eps, lid_mount_d+wall_thickness], center=true);
                translate([lid_mount_offset_l, width-lid_mount_hole_d/2, height-lid_mount_hole_d/2])
                    rotate([0,-90,0]) lid_mount_hole(add=wall_thickness*2);
                    //cube([lid_mount_hole_w+wall_thickness*2, lid_mount_hole_d+eps, lid_mount_d+wall_thickness], center=true);
            }
        }
        // emboss text labels
        if (text_width > 0 && text_height > 0 && len(text) > 0)
            for(r=[0:1:rows-1])
                //spacing/4
                translate([wall_thickness + add_left + (text_width_to_add+spacing/2-f)/2,
                wall_thickness+r*(spacing+thread_diameter)+(spacing+thread_diameter-text_height)/2, height-text_embossing])
                    resize([text_width-wall_thickness, text_height-wall_thickness])
                    linear_extrude(height = text_embossing)
                        text(getsplit(text_fixed, rows-1-r, ";"), size=text_height, halign="center", valign="bottom", font = "Arial");
        if (has_lid) {
            // make holes for lid mounts
            //offset_r = length-wall_thickness-thread_diameter-spacing;
            //offset_l = wall_thickness+text_width+thread_diameter+spacing;
            translate([lid_mount_offset_r, width-lid_mount_hole_d/2, height-lid_mount_hole_d/2])
                rotate([0,-90,0]) {
                    lid_mount_hole(shaft=true);
                    //if (solid)
                        // make holes on outer walls
                        translate([0, 0, -(lid_mount_hole_w+wall_thickness*3-eps)/2])
                            cylinder(d=lid_mount_shaft_d, h=wall_thickness*1.5+eps, center=true);
                }
            translate([lid_mount_offset_l, width-lid_mount_hole_d/2, height-lid_mount_hole_d/2])
                rotate([0,-90,0]) {
                    lid_mount_hole(shaft=true);
                    //if (solid)
                        // make holes on outer walls
                        translate([0, 0, (lid_mount_hole_w+wall_thickness*3-eps)/2])
                            cylinder(d=lid_mount_shaft_d, h=wall_thickness*1.5+eps, center=true);
                }
        }
    }
}

module lid() {
    difference() {
        lid_mounts_offset = 0.2;
        s = lid_mount_d/2*sin(30)+lid_mount_d;
        union() {
            difference() {
                translate([round_corners/2, round_corners/2, 0])
                    minkowski() {
                        cube([length - round_corners, width - round_corners, lid_height-1]);
                        cylinder(d=round_corners, h=1);
                    }
                translate([round_corners/2 + wall_thickness, round_corners/2 + wall_thickness, -eps/2])
                    minkowski() {
                        cube([length - round_corners - wall_thickness*2, width - round_corners - wall_thickness*2, lid_height - 1 + eps]);
                        cylinder(d=round_corners, h=1);
                    }
                translate([length+eps/2, width-lid_mount_hole_d/2, -lid_mount_d/2-lid_mounts_offset])
                    rotate([0,-90,0])
                        cylinder(d=d_cut, h=length+eps);
            }
            translate([wall_thickness, wall_thickness, lid_height-wall_thickness])
                cube([length-wall_thickness*2, width-wall_thickness*2, wall_thickness]);
            // mounts
            translate([lid_mount_offset_r, width-lid_mount_hole_d/2, -lid_mount_d/2-lid_mounts_offset])
                rotate([0,-90,0])
                    lid_mount_hole(hole=true);
            translate([lid_mount_offset_l, width-lid_mount_hole_d/2, -lid_mount_d/2-lid_mounts_offset])
                rotate([0,-90,0])
                    lid_mount_hole(hole=true);

            translate([lid_mount_offset_l/2+wall_thickness/2+lid_mount_width/4,
                        width-lid_mount_hole_d/2+(lid_mount_d-s)/2, (lid_height-eps-lid_mounts_offset)/2])
                cube([lid_mount_offset_l-wall_thickness+lid_mount_width/2,s,lid_height-eps+lid_mounts_offset], center=true);
            translate([lid_mount_offset_r+(lid_mount_offset_l-wall_thickness+lid_mount_width/2)/2-lid_mount_width/2,
                        width-lid_mount_hole_d/2+(lid_mount_d-s)/2, (lid_height-eps-lid_mounts_offset)/2])
                cube([lid_mount_offset_l-wall_thickness+lid_mount_width/2,s,lid_height-eps+lid_mounts_offset], center=true);
        }
        d_cut = sqrt(lid_mount_d*lid_mount_d/4 + lid_mount_hole_d*lid_mount_hole_d/4)*2 + tolerance*2-lid_mounts_offset*2;
        w_cut = lid_mount_offset_l-lid_mount_width/2;
        translate([w_cut, width-lid_mount_hole_d/2, -lid_mount_d/2-lid_mounts_offset])
            rotate([0,-90,0]) {
                cylinder(d=d_cut, h=w_cut+eps);
                translate([lid_mount_d/2,-s/2-lid_mount_d/4*sin(30)-eps/2,0])
                    cube([lid_mounts_offset+eps, s+eps, w_cut+eps]);
            }
        translate([length+eps, width-lid_mount_hole_d/2, -lid_mount_d/2-lid_mounts_offset])
            rotate([0,-90,0]) {
                cylinder(d=d_cut, h=w_cut+eps);
                translate([lid_mount_d/2,-s/2-lid_mount_d/4*sin(30)-eps/2,0])
                    cube([lid_mounts_offset+eps, s+eps, w_cut+eps]);
            }
        // lid text
        if (lid_text_width > 0 && lid_text_height > 0 && len(lid_text) > 0) {
            lid_text_width = min(lid_text_width, length-wall_thickness*2);
            lid_text_height = min(lid_text_height, width-wall_thickness*2);
            translate([length/2, width/2, lid_height-text_embossing])
                resize([lid_text_width, lid_text_height])
                    linear_extrude(height = text_embossing)
                        text(lid_text, size=lid_text_height, halign="center", valign="center", font = "Arial");
        }
    }

}

if (mode == 1 || mode == 3)
    translate([0,(solid)?0:width,(solid)?0:height])
        rotate([(solid)?0:180,0,0])
            holder();
if (mode == 2)
    translate([0,width,lid_height])
        rotate([180,0,0])
            lid();
if (mode == 3 && has_lid)
    translate([0,-5,lid_height])
        rotate([180,0,0])
            lid();

if (mode == 4) {
    holder();
    if (has_lid)
        translate([0,-lid_mount_hole_d/2+width,height-lid_mount_d/2])
            rotate([-30,0,0])
                translate([0,lid_mount_hole_d/2-width,lid_mount_d/2])
                    lid();
}
}

main();

```


[User]
Okay, I'm looking to design a parametric direct-drive extruder block for my 3D printer, and I've got some specific requirements. It needs to be based on the Replicator 2X style, but with a few modifications, including a Bowden tube setup. I'd also like it to have a 4-hole NEMA17 motor mount and a side flange that can be toggled on or off.

Here's a breakdown of what I need:

*   **Overall Design:** The block should be designed for supportless 3D printing. It should be compatible with the Replicator 2X lever (I can handle that part separately), and it should mount directly to a NEMA17 motor using a standard 4-hole pattern.

*   **Bowden Tube:**
    *   It needs an integrated guide for the Bowden tube with a variable length. I'll want to be able to adjust how far the guide sticks out.
    *   I also need a parametric hole for a Bowden tube fixing screw, and it should have options for M2.5 or M3 thread sizes, or no screw at all.
    * The Bowden tube and filament holes need a flat chamfer, or rounded chamfer for best results.

*   **Spring Mechanism:**
    *   There should be an integrated spring force mechanism, with parameters for the spring hole radius. I want to be able to adjust this depending on the spring I use.
    * There should be a small centering pin for the inner spring and a small relief cut at the top of the spring hole to assist in printability.

*   **Motor Mount:**
    *   Standard 4-hole NEMA17 mount. The screw holes should have countersunk chamfers for better screw fitment.

*   **Side Flange:**
    *   The design should include an optional side flange that can be turned on/off with a parameter. The design of this flange should be optimized for supportless printing.
    * There should be screw holes on the side flange with countersunk chamfers.

*   **Filament Path:**
    *   The filament path needs to have a parametric hole with a chamfer.

*   **Parameters:** I'd like to be able to easily change the following through parameters:
    *   Spring hole radius
    *   Filament hole radius
    *   Bowden tube hole radius
    *   Bowden tube guide length
    *   Bowden tube fixing screw size (or none)
    *   Side flange (on/off)
    * NEMA Mounting Hole spacing

I think that should cover all of the basics for the design. I don't need any libraries for now. Can you design a parametric OpenSCAD file(s) that includes this functionality?

[Assistant]
my_block_2015-12-18.scad:
```
//********************************************
//* Direct Drive NEMA17 Extruder block with spring force
//* compatible to Replicator 2X lever parts
//*
//*   Designed for supportless prints and 4-hole flange
//*     by Henning Stöcklein     Version 18.12.2015
//*     Free for non commercial use
//********************************************

// use <my_lever.scad>

// Radius of spring hole
r_Spring = 4.7 ;

// Radius of Filament hole
r_Filament = 1.1 ;

// Radius of Bowden tube hole
r_Bowden = 2.0 ;

// Select Flange Type
Side_Flange = 1 ;   // [0:No Side Flange, 1:Use Side Flange]

// Radius NEMA Hole distance
rla = 15.5 ;

// Length of Bowden Tube Guide
h_Bowden = 2 ; // [0:10]

// Radius of Bowden Tube Fixing Thread Hole
r_Bowden_Fix = 1 ; // [0:No Fixing Hole, 1:M2.5 Fixing Hole, 1.2:M3 Fixing Hole]

module roundcube (x, y, z, rad)
{
    hull() {
      translate ([-x/2+rad, -y/2+rad, 0]) cylinder (r=rad,h=z, center=true, $fn=30) ;
      translate ([-x/2+rad, y/2-rad, 0]) cylinder (r=rad,h=z, center=true, $fn=30) ;
      translate ([x/2-rad, -y/2+rad, 0]) cylinder (r=rad,h=z, center=true, $fn=30) ;
      translate ([x/2-rad, y/2-rad, 0]) cylinder (r=rad,h=z, center=true, $fn=30) ;
    }
}

module round2cube (x, y, z, rad)
{
    hull() {
      translate ([-x/2, -y/2, 0]) cylinder (r=0.01,h=z,center=true, $fn=30) ;
      translate ([-x/2+rad, y/2-rad, 0]) cylinder (r=rad,h=z,center=true, $fn=30) ;
      translate ([x/2, -y/2, 0]) cylinder (r=0.01,h=z,center=true, $fn=30) ;
      translate ([x/2-rad, y/2-rad, 0]) cylinder (r=rad,h=z,center=true, $fn=30) ;
    }
}

module mybaseblock() {
  difference() {
    union(){
       if (Side_Flange == 1) rotate ([0,0,-90]) round2cube (42.6, 42.6, 4, 5.8) ;
       rotate ([0,0,-90]) roundcube (42.6, 42.6, 4, 5.8) ;
       translate ([-rla,+rla,1]) cylinder (r=5.8, h=4, $fn=30, center=true) ;
    }

    // NEMA17-Flange with chamfer
    cylinder (r=22.5/2, h=10, $fn=40, center=true) ;
    translate ([0,0,-2.3]) cylinder (r2=22.5/2, r1=25/2, h=2, $fn=40, center=true) ;

    // 4 Screw holes with chamfers
    translate ([+rla,+rla,0]) cylinder (r=3.5/2, h=10, $fn=20, center=true) ;
    translate ([+rla,+rla,1.3]) cylinder (r1=3.5/2,r2=3.3,h=2,$fn=20,center=true) ;
    translate ([+rla,-rla,0]) cylinder (r=3.5/2, h=10, $fn=20, center=true) ;
    translate ([+rla,-rla,1.3]) cylinder (r1=3.5/2,r2=3.3,h=2,$fn=20,center=true) ;
    translate ([-rla,-rla,0]) cylinder (r=3.5/2, h=10, $fn=20, center=true) ;
    translate ([-rla,-rla,1.3]) cylinder (r1=3.5/2,r2=3.3,h=2,$fn=20,center=true) ;
    translate ([-rla,+rla,0]) cylinder (r=3.5/2, h=10, $fn=20, center=true) ;

  // Horizontal Cylinder cutout for Bowden
  translate ([-6,-20,8]) rotate ([90,0,0]) cylinder (r=7,h=20,$fn=40, center=true) ;
  } // difference
}

module myblock()
{
   difference() {
      union() {
        translate ([14.3,-2.22,6.5]) cube ([14.0,18.55,13], center=true); // Federblock
        translate ([1.1,-7.0,6.5]) cube ([20,9,13], center=true);
        translate ([1.1,-10,6.5]) cube ([25,2,13], center=true);
        translate ([8,-2,6.5]) cube ([5,5,13], center=true);

        // Cylinder on Spring block with chamfer
        translate ([14.3,-1.65,7.6]) rotate ([90,0,0]) cylinder (r=r_Spring+1.7, h=17.45, $fn=50, center=true);
        translate ([14.3,-10.92,7.6]) rotate ([90,0,0]) cylinder (r1=r_Spring+1.7,r2=r_Spring+1, h=1.15, $fn=50, center=true);
        translate ([-13.2,-10,7]) cube ([16, 3, 12], center=true);
        translate ([-9.8,-8.9,7]) rotate ([0,0,45]) cube ([5.4, 2, 12], center=true);

       // Side flange and triangle blocks
       if (Side_Flange == 1)
       {
            translate ([-21.5,4.2,5.5]) rotate ([90,0,90]) round2cube (55,15,5,4);
            translate ([-16,23.3,0]) rotate ([0,0,-45]) cube ([15.5,7,4], center=true) ;
            translate ([-18.5,-20.5,0]) rotate ([0,0,45]) cube ([5,3,4], center=true) ;
       }

      // Cylinder at Filament outlet hole / Bowden guide
      hull() {
        translate ([-6,-9-(h_Bowden+2.5)/2, 1]) cube ([5.3*2, h_Bowden+2.5, 0.1], center=true) ;
        translate ([-6,-9-(h_Bowden+2.5)/2, 7.6]) rotate ([90,0,0])
                cylinder (r=5.35, h=h_Bowden+2.5, $fn=40, center=true);
        } // hull
      } // union

      // Chamfer at Spring block
      translate ([14.3+8.5,-2,13]) rotate ([0,45,0]) cube ([4,19,4], center=true);
      translate ([14.3-8.5,7.5,13]) rotate ([0,45,0]) cube ([4,14,4], center=true);
      translate ([14.3+8,7.5,6]) rotate ([0,0,45]) cube ([4,4,15], center=true);
      translate ([14.3+8,-11.5,6]) rotate ([0,0,45]) cube ([4,4,15], center=true);
      translate ([14.3-8,7.5,6]) rotate ([0,0,45]) cube ([4,4,15], center=true);

      // Kugelkuppe auf Rückseite Federblock
      translate ([14.3,-20.4,7.5]) sphere (r=10.1, $fn=40);

      // Hole for spring with chamfer
      translate ([14.3,3,7.6]) rotate ([90,0,0]) cylinder (r=r_Spring, h=13, $fn=30, center=true);
      translate ([14.3,6.8,7.6]) rotate ([90,0,0]) cylinder (r2=r_Spring, r1=r_Spring+1, h=1.5, $fn=30, center=true);

      // Cutout on top of spring hole for best printability
      translate ([14.3,3,7.0+r_Spring]) scale ([1.5,1,0.8]) rotate ([0,45,0]) cube ([2, 13, 2], center=true);

      // Hole for Filament, with flat chamfer
      translate ([-6,-7,7.6]) rotate ([90,0,0]) cylinder (r=r_Filament, h=15, $fn=20, center=true);
      translate ([-6,-3.7,7.6]) rotate ([90,0,0]) cylinder (r2=r_Filament, r1=r_Filament+1.5, h=2.6, $fn=30, center=true);

      // Hole for Bowden with chamfer
      translate ([-6,-9-(h_Bowden+2.5)/2,7.6]) rotate ([90,0,0]) cylinder (r=r_Bowden, h=h_Bowden+4.5, $fn=20, center=true);
     translate ([-6,-9.2-(h_Bowden+2.5),7.6]) rotate ([90,0,0]) cylinder (r1=r_Bowden, r2=r_Bowden+2, h=2, $fn=30, center=true);
     translate ([-6,-8-(h_Bowden+2.5)/2, 11]) cylinder (r=r_Bowden_Fix, h=5, $fn=20, center=true);

      // Cutout for Lever
      hull() {
         translate ([-16,-3,2]) cylinder (r=6.7, h=20, $fn=30) ;
         translate ([-16,16,2]) cylinder (r=6.7, h=20, $fn=30) ;
      }

      // Schraublöcher an seitlicher Befestistungsplatte mit Fasen
      translate([-26,-16,6]) rotate ([0,90,0]) cylinder (r=3.5/2, h=10,$fn=20);
      translate([-21,-16,6]) rotate ([0,90,0]) cylinder (r1=3.5/2, r2=6.5/2, h=2.1,$fn=20);
      translate([-26,26,6]) rotate ([0,90,0]) cylinder (r=3.5/2, h=10,$fn=20);
      translate([-21,26,6]) rotate ([0,90,0]) cylinder (r1=3.5/2, r2=6.5/2, h=2.1,$fn=20);

      // Aussparung für Andruckrolle
      translate ([-12.7,1.1,7.6]) cylinder (r=7, h=14, $fn=50, center=true);

      // Aussparung für Antriebsrad
      translate ([0.1,0,7.6]) cylinder (r=6.72, h=16, $fn=50, center=true);

      // Fase oberhalb Motorflansch
      translate ([0,0,0.8]) cylinder (r2=13/2, r1=27/2, h=5, $fn=40, center=true) ;
   } // difference

  // Zentrierzapfen für innere 2.Feder in der Bohrung
  translate ([14.3,-3,7.6]) rotate ([90,0,0]) cylinder (r1=0.8, r2=2, h=3, $fn=20, center=true);
}

translate ([0,0,2]) myblock () ;
translate ([0,0,2]) mybaseblock () ;

// translate ([-21,-16.5,0]) %lever(1);

```


[User]
I'm looking to create a customizable funnel for my 3D printer extruder, specifically a Flashforge. I want it to improve the interface with the filament guide tubes and keep them in place. I need the design to be parametric so I can adjust it for different filament tube diameters and wall thicknesses, and potentially even different printers later on.

Here are the key features I'm looking for:

*   **Bottom Hole Diameter:** This needs to be a parameter so I can make sure the tube fits tightly. It should be the inner diameter of the bottom of the funnel. Let's call this `bottom_hole_diameter`.
*   **Top Hole Diameter:** This will be the inner diameter at the top of the funnel, wider than the bottom. Call this parameter `top_hole_diameter`.
*   **Bottom Wall Thickness:**  This is the thickness of the wall at the bottom where the tube connects. Let's call this `bottom_wall`.
*   **Top Wall Thickness:** This should be the thickness of the wall at the top opening of the funnel. Call this parameter `top_wall`.
*   **Straight Height:** There needs to be a short, cylindrical extension at the bottom to act as a good connecting tube for the filament guide tube. I'd like to control the height of this part with a parameter called `straight_height`.
*   **Funnel Height:** The height of the actual funnel part itself should be adjustable with a parameter named `funnel_height`.
*   **Chamfer:** I need a small chamfer at the bottom of the hole to help guide the filament tube in, controlled by `chamfer`.
*   **Inner Shape Control:**  The curve of the inner surface of the funnel should be adjustable with a parameter; I would like it to be controlled by a coefficient, say `k1`.
*   **Outer Shape Control:**  Similarly, I need a parameter to control the curve of the outer surface of the funnel, something like `k2`.
*   **Mode:** I'd like to have a `mode` variable where the design can be previewed with a low `$fn` and rendered at higher quality with a higher `$fn`. Let's say `design` for the low `$fn` preview mode and `printing` for high `$fn` rendering.

The design should produce a solid object, and I intend to 3D print it, probably with ABS. I expect I'll need to glue it to the extruder.

I would appreciate it if the design was created from scratch and not modified from other designs, and it would be great if you could organize the code into logical modules.

The design should not use any external libraries; it should be pure OpenSCAD code.

[Assistant]
funnel.scad:
```

// Mode. Use "printing" for actual printing.
mode = "design";  // [design, printing]

// Diameter at the bottom of the funnel. Tweak for good tube fit.
bottom_hole_diameter = 7;

// Controls the inner shape of the hold.
k1 = 4;

// Controls the outer shape of the funnel.
k2 = 2;

// Diameter at the top of the funnel.
top_hole_diameter = 11;

// Wall thickness at bottom of funnel
bottom_wall = 4;

// Wall thickness at top of funnel.
top_wall = 3;

// Height of a cylindrical extension at the bottom.
straight_height = 1;

// Height of the funnel part.
funnel_height = 11;

// Hole chamfer at the bottom.
chamfer = 0.3;

/* [ Hidden ] */
eps1 = 0.001;
eps2 = 2*eps1;

module solid_funnel(d1, d2, h, k, n) {
  h0 = h - eps1;
  for (i =[0:n-1]) {
    //echo(i);
    h_1 = h0 * i / n;
    h_2 = h0 * (i+1) / n;

    offset_1 = (d2 - d1) * pow(h_1,k)/pow(h0,k);
    offset_2 = (d2 - d1) * pow(h_2,k)/pow(h0,k);

    d_1 = d1 + 2*offset_1;
    d_2 = d1 + 2*offset_2;
    // Extending vertically by eps1 to maintain manifold with next slice.
    translate([0, 0, h_1]) cylinder(d1=d_1, d2=d_2, h=eps1+h/n);
  }
}

module hollow_funnel(od1, od2, id1, id2, h, k1, k2) {
  difference() {
    solid_funnel(od1, od2, h, k2, floor($fn/4));
    translate([0, 0, -eps1]) solid_funnel(id1, id2, h+eps2, k1, floor($fn/4));
  }
}

module main() {
  // Funnel
  translate([0, 0, straight_height-eps1]) hollow_funnel(bottom_hole_diameter+2*bottom_wall, top_hole_diameter+2*top_wall, bottom_hole_diameter, top_hole_diameter, funnel_height, k1, k2);

  // Hollow tube extension at the bottom.
  difference() {
    cylinder(d=bottom_hole_diameter+2*bottom_wall, h=straight_height);
    translate([0, 0, -eps1]) cylinder(d=bottom_hole_diameter, h=straight_height+eps2);
    translate([0, 0, -eps1]) cylinder(d1=bottom_hole_diameter+2*chamfer, d2=bottom_hole_diameter, h=chamfer+eps2);
  }
}

if (mode == "design") {
  $fn=30;
  render(convexity = 2) difference() {
    main();
    rotate([0, 0, -75]) translate([0, 0, -eps1]) cube([100, 100, 100]);
  }
} else {
  $fn=90;
  main();
}

```


[User]
I'd like to design a parametric lollipop tree using OpenSCAD. The tree should have a conical shape with lollipop sticks spiraling up it, each lollipop angled more vertically as it goes up.

The base of the tree will be a solid, truncated cone. I want to be able to set the overall cone's height and base radius. I'd also like to be able to specify how many times the lollipop spirals go around the cone – like the number of rings of lollipops, if you will.

The lollipop sticks should be represented by cylinders. I need to control the radius of these cylinders, how far they should stick into the cone, and the separation between each stick. I also want the angle of the sticks to increase gradually as they go up the cone, starting with an angle of 10 and going to 60 degrees relative to horizontal.

I think it might be easiest if the tree is constructed by first building a solid cone, then subtracting a smaller cone from the center and also subtracting all the stick-holes. Then build the base by subtracting a tall cube from the cone, and finally use a final "inner" cone to define the inside edges.

Could you please generate the necessary OpenSCAD code for this design? I don't have any specific OpenSCAD library requirements beyond the core functionality. Thank you!

[Assistant]
lollipopTree.scad:
```
/* [BASE] */

CONE_HEIGHT = 50;
BASE_RADIUS = 25;
TOTAL_ROWS = 5; // Number of circles around the cone

/* [STICKS] */

STICK_RADIUS = 1.9;
STICK_HEIGHT = 5;
STICK_SEPARATION = 6; // mm

tree();

module tree()
{
  union()
  {
  difference()
    {
     coneOuter();
     union()
     {
       coneInner1();
       sticks();
     }
    }
   coneInner2();
   base();
   }
}

module coneOuter()
{
 translate([0,0,CONE_HEIGHT/2])
   cylinder(h = CONE_HEIGHT, r1 = BASE_RADIUS, r2 = 0, center = true);

}

module base()
{
    difference()
    {
        coneOuter();
        translate([0,0,CONE_HEIGHT+2])
         cube(CONE_HEIGHT*2, center=true);
    }

}

module coneInner1()
{
 translate([0,0,(CONE_HEIGHT-STICK_HEIGHT-1)/2])
   cylinder(h = CONE_HEIGHT-STICK_HEIGHT, r1 = BASE_RADIUS-STICK_HEIGHT, r2 = 0, center = true);

}
module coneInner2()
{
 translate([0,0,(CONE_HEIGHT-(STICK_HEIGHT+5))/2])
   cylinder(h = CONE_HEIGHT-(STICK_HEIGHT+5), r1 = BASE_RADIUS-(STICK_HEIGHT+5), r2 = 0, center = true);

}
module stick(angle)
{
   rotate([0,angle,0])
   translate([0,0,CONE_HEIGHT])
     cylinder(r=STICK_RADIUS, h=CONE_HEIGHT*2, center=true, $fn=20);
}

module sticks()
{
    distancePerCircle = CONE_HEIGHT/(TOTAL_ROWS+1.5);
    anglesPerRow = (60-10)/TOTAL_ROWS;
    union()
    {
       for (currentRow = [1:TOTAL_ROWS])
       {
           circleRadius = getRowRadius(currentRow);
           baseAngle = currentRow*anglesPerRow;
           echo(baseAngle);
           numberSticks = floor(circleRadius*2*PI/STICK_SEPARATION);
           for (currentStick = [1:numberSticks])
           {
             flatAngle = 360*(currentStick/numberSticks);
             stickAngle = baseAngle + anglesPerRow*(currentStick/numberSticks);
             upHeight = CONE_HEIGHT-(currentRow*distancePerCircle)-
               (distancePerCircle*currentStick/numberSticks)-
               distancePerCircle;
             prevRadius = getRowRadius(currentRow-1);
             distance = prevRadius + (circleRadius-prevRadius)*currentStick/numberSticks;
             x = cos(flatAngle)*distance;
             y = sin(flatAngle)*distance;
             translate([x,y,upHeight])
               rotate([0,0,flatAngle])
                stick(stickAngle);
           }
       }
    }
}
function degrees(x) = ((180*x)/PI);
function getRowRadius(x) = (BASE_RADIUS-(STICK_HEIGHT+5))*x/(TOTAL_ROWS);

```


[User]
I need an OpenSCAD design for replacement feet for card table legs, but I want them to be parametric so I can adjust the size to fit different tables. I've included my original file to show the basic idea.

The feet are essentially short cylinders with a hollowed-out center to fit over the existing table leg. The important parameters I need to be able to control are:

*   `thickness`: The thickness of the walls and the base of the foot.
*   `height`: The total height of the foot.
*   `insideDiameter`: The diameter of the hole in the center where the table leg goes.
*   `numberOfFeet`: The number of feet to generate.

I'd also like to have an option to add a slight taper to the *outside* of the foot, like a frustrum. The taper would be specified as an *outside diameter* of the foot at its base. If no taper is specified, the outside should be a straight cylinder.

The design should center the feet on the build plate, so they're easily printable, or at least the *group* of feet should be centered. It would be best if each foot is a separate object in the output, not a union, to make slicing easier. I'd like to be able to control the spacing between the feet so they are close but not fused together. Let's add a variable `footSpacing`.

I don't need any fancy features, just a solid, printable design. I'm not using any libraries, and would prefer to not use any unless you think it's critical. I would especially like to avoid any dependencies on a library where I would need to be concerned about the library changing in future versions.

[Assistant]
TubeTypeTableFeet.scad:
```
//
//  Tube Type Table Feet
//
//  EvilTeach
//
//  12/12/2015
//
//  This generates 4 covers to put on the table feet.

// The actual thickness of the bottom and walls
thickness      =  3.0;

// The total height of one foot
height         = 20.0;

// The diameter of the hollow part where the tube goes.
insideDiameter = 26.2;

// how many do we want to print?
numberOfFeet = 4;

insideRadius = insideDiameter / 2.0;
outsideDiameter = insideDiameter + thickness * 2.0;
outsideRadius = outsideDiameter / 2.0;

// Draws one foot
module draw_one()
{
    // Make it nice and round
    $fn = 360;

    difference()
    {
        // take the basic cylinder
        cylinder(r = outsideRadius, h = height);

        // remove the inner cylinder, up one thickness
        translate([0, 0, thickness])
            cylinder(r = insideRadius, h = height - thickness);
    }

}

module main()
{
    // Generally we need four of them.  We try to center them on the build plate
    for (x=[-numberOfFeet / 2 + 1 : numberOfFeet / 2 ])
    {
        translate([x *  outsideDiameter - outsideRadius,
                   x * 5,  // Just a little bit apart
                   0])
            draw_one();
    }
}

main();
```


[User]
I'd like to design a customizable box with a lid, and I need it to be parametric. I want to be able to adjust the box's length, width, and height. I also need to be able to choose what shape goes on the lid, like a sphere, cube, or pyramid, and I want to be able to specify whether or not the box has a secret compartment inside.

The basic box should have walls with a customizable thickness, and the base should have a customizable thickness as well. The lid should fit snugly on the box with a tolerance that I can adjust. I also want to adjust the lid height.

Here's what I need to control:

*   **Box Dimensions:** length, width, and height of the main box.
*   **Wall Thickness:** The thickness of the box walls.
*   **Base Thickness:** The thickness of the box base.
*   **Lid Height:** The height of the main lid part.
*   **Lid Shape:** The shape on top of the lid (sphere, cube, pyramid, or maybe a few other more complex shapes).
*   **Secret Compartment:** Boolean to add or remove the secret compartment.
*   **Tolerance:** The gap between the box and the lid.
*   **$fn:** The number of fragments to use for curves and circles.

The basic box will be a rectangular prism with an interior cavity. The lid should have a matching shape so it can sit on top of the box. If the secret compartment is enabled, the main interior of the box should be smaller and have a second hidden compartment with its own interior space.
I would also like to have the option for the lid shape to be more than just a cube, sphere, or pyramid.  I'd like some more complicated shapes such as a triangulated dome, a diamond shape, and a pyramid composed of triangles.

Could you generate the necessary OpenSCAD files?  I don't need any libraries other than standard OpenSCAD modules, thanks.

[Assistant]
Box.scad:
```

figure = "sphere";      //[sphere,cube,pyramide,triangles,pyramide2,diamond,pyramide3]
//Secret compartment
Secret = "false";   //[true,false]
//Cover
Cover = "true";     //[true,false]
//Box length
long_boit = 100;
//Box width
larg_boit = 100;
//Box height
haut_boit = 100;

module toto() {
}

$fn = 24;

haut_bo_s = haut_boit/2;
ray_sph = long_boit/10;
ray1_cyl = larg_boit/5.5;
ray2_cyl = 0;
haut_cyl = haut_boit/3;
cote_cub = long_boit/6;
ray_cyl_t = ray_sph;
haut_cyl_t = ray_cyl_t;
haut_t = ray_sph*2;
cot_tr = cote_cub*1.5;

teta = 2;
ep_bort = 1.5;
ep_bort_s = 2.25;
ep_fond = 1.5;
sec_haut = 5;
sec = 2;
haut_couv_av_hul = 2;   //hauteur du couvercle avant que l'on fasse le hull
haut_bord = haut_couv_av_hul;
long_boit_int = long_boit - ep_bort*teta;
larg_boit_int = larg_boit - ep_bort*teta;
haut_boit_int = haut_boit - ep_fond;
haut_couv = haut_boit/teta;
ray_cyl_mink = 1;
haut_cyl_mink = 1;
tolerance=0.5;

boite();
if(Secret == "false") {
    translate([0,larg_boit+10,0])
    if(Cover == "true") {
        couvercle();
    }
}
if(Secret == "true") {
    if(Cover == "true") {
        translate([0,larg_boit*2+10*2,0])
        couvercle();
    }
}

module boite() {
    if(Secret == "true") {
        translate([0,larg_boit+10,0]){
            union() {
                difference() {
                translate ([ray_cyl_mink, ray_cyl_mink, 0])
                    minkowski() {
                        cube([long_boit-2*ray_cyl_mink, larg_boit-2*ray_cyl_mink, haut_boit-haut_cyl_mink]);
                        cylinder(r = ray_cyl_mink, h = haut_cyl_mink);
                    }
                    translate([ep_bort_s/3*2, ep_bort_s/3*2, ep_fond])
                        cube([long_boit-ep_bort_s/3*2*2, larg_boit-ep_bort_s/3*2*2, haut_boit_int + sec_haut]);
        //            translate([ep_bort/teta,ep_bort/teta,haut_boit-haut_bord])
        	//			cube([long_boit-ep_bort, larg_boit-ep_bort, haut_bord + sec]);
                    translate([ep_bort_s/3,ep_bort_s/3,haut_bo_s-haut_couv_av_hul])
                    cube([long_boit-ep_bort_s/3*2,larg_boit-ep_bort_s/3*2,haut_boit]);
                }
            }
        }
                        difference() {
                    cube([long_boit_int+ep_bort_s/3,larg_boit_int+ep_bort_s/3,haut_boit_int-haut_bo_s]);
                    translate([ep_bort_s/2,ep_bort_s/2,ep_fond])
                    cube([long_boit_int-ep_bort_s/3*2,larg_boit_int-ep_bort_s/3*2,haut_boit_int]);
            }
        }

    if(Secret == "false") {
        union() {
            difference() {
                translate ([ray_cyl_mink, ray_cyl_mink, 0])
                    minkowski() {
                        cube([long_boit-2*ray_cyl_mink, larg_boit-2*ray_cyl_mink, haut_boit-haut_cyl_mink]);
                        cylinder(r = ray_cyl_mink, h = haut_cyl_mink);
                    }
                    translate([ep_bort, ep_bort, ep_fond])
                        cube([long_boit_int, larg_boit_int, haut_boit_int + sec_haut]);
                    translate([ep_bort/teta,ep_bort/teta,haut_boit-haut_bord])
                        cube([long_boit-ep_bort, larg_boit-ep_bort, haut_bord + sec]);

            }
        }

    }

    }

module couvercle() {
    union () {
        hull() {
			translate ([ray_cyl_mink, ray_cyl_mink, 0])
				minkowski() {
					cube([long_boit - ep_bort - ray_cyl_mink*2 - tolerance, larg_boit - ep_bort - ray_cyl_mink*2 - tolerance, haut_couv_av_hul]);
					cylinder(r = ray_cyl_mink, h = haut_cyl_mink);
				}
            if(figure == "sphere")
                translate([long_boit/teta - ep_bort - tolerance/2,  larg_boit/teta - ep_bort - tolerance/2, haut_couv+ray_sph])
					sphere(r=ray_sph);
            if(figure == "cube")
                translate([long_boit/teta -cote_cub/teta - tolerance/2, larg_boit/teta -cote_cub/teta - tolerance/2, haut_couv])
					cube(cote_cub);
            if(figure == "pyramide")
                translate([long_boit/teta - ep_bort - tolerance/2,  larg_boit/teta - ep_bort - tolerance/2, haut_couv+ray_sph])
					sphere(r=ray_sph);
            if(figure == "triangles")
                translate([long_boit/teta - ep_bort - tolerance/2,  larg_boit/teta - ep_bort - tolerance/2, haut_couv+ray_sph])
					sphere(r=ray_sph);
            if(figure == "pyramide2")
                translate([long_boit/teta - ep_bort - tolerance/2,  larg_boit/teta - ep_bort - tolerance/2, haut_couv+ray_sph])
					sphere(r=ray_sph);
            if(figure == "diamond")
                translate([long_boit/teta - ep_bort - tolerance/2,  larg_boit/teta - ep_bort - tolerance/2, haut_couv+ray_sph])
					sphere(r=ray_sph);
            if(figure == "sphere2")
                translate([long_boit/teta - ep_bort - tolerance/2,  larg_boit/teta - ep_bort - tolerance/2, haut_couv+ray_sph])
					sphere(r=ray_sph);
            if(figure == "pyramide3")
                translate([long_boit/teta - ep_bort - tolerance/2,  larg_boit/teta - ep_bort - tolerance/2, haut_couv+ray_sph])
					sphere(r=ray_sph);

        }
            if(figure == "sphere")
                translate([long_boit/teta - ep_bort - tolerance/2,  larg_boit/teta - ep_bort - tolerance/2,  haut_couv+ray_sph*teta+ray_sph*0.7])
                sphere(r=ray_sph);
            if(figure == "cube")
                translate([long_boit/teta - tolerance/2, larg_boit/teta - tolerance/2, haut_couv+cote_cub*1.5])
                cube(cote_cub,center=true);
            if(figure == "pyramide")
                translate([long_boit/teta - ep_bort - tolerance/2,  larg_boit/teta - ep_bort - tolerance/2 ,haut_couv+haut_cyl+haut_cyl/1.2])
                rotate([180,0,0])
                cylinder(r1 = ray1_cyl, r2 = ray2_cyl, h = haut_cyl);
            if(figure == "triangles")
                translate([long_boit/2-haut_cyl_t*3.15,larg_boit/2-haut_cyl_t/1.2,0])
                union() {
                    translate([haut_t-ray_sph/6,0,haut_t+ray_cyl_t+haut_couv+ray_sph])
                    couv_t();
    }
            if(figure == "pyramide2")
                translate([long_boit_int/2-cote_cub/2,larg_boit_int/2-cote_cub/2,haut_couv+ray_sph*2])
                rotate([0,180,0])
                translate([-cote_cub+ray_sph/16,-ray_sph/16,-haut_cyl+1])
                hull() {
                    cube([cote_cub,cote_cub,1]);
                    translate([cote_cub/2-0.5,cote_cub/2-0.5,haut_cyl])
                    cube([1,1,1]);
                }
            if(figure == "diamond")
                translate([long_boit_int/2-cote_cub/2,larg_boit_int/2-cote_cub/2,haut_couv+ray_sph*2])
                rotate([0,180,0])
                translate([-cote_cub+ray_sph/16,-ray_sph/16,-haut_cyl+1])
                hull() {
                    cube([cote_cub,cote_cub,1]);
                    translate([cote_cub/2-0.5,cote_cub/2-0.5,haut_cyl])
                    cube([1,1,1]);
                    translate([cote_cub/2-0.5,cote_cub/2-0.5,-haut_cyl])
                    cube([1,1,1]);
                }
            if(figure == "pyramide3")
                translate([-cot_tr/2,-(sqrt(cot_tr*cot_tr-(cot_tr/2*cot_tr/2)))/3,0])
                translate([long_boit/2-ray_cyl_mink*2,larg_boit/2-ray_cyl_mink*2,haut_couv+ray_sph*2+cot_tr/1.5])
            mirror([0,0,1]){
                    tri_equ();
            }

}

}

module couv_t() {
    rotate([-90,0,0])
        hull () {
            translate([0,0,0])
                cylinder(r=ray_cyl_t,h=haut_cyl_t);
            translate([haut_t,0,0])
                cylinder(r=ray_cyl_t,h=haut_cyl_t);
            translate([haut_t/2,haut_t,0])
                cylinder(r=ray_cyl_t,h=haut_cyl_t);
    }
        translate([haut_cyl_t+ray_cyl_t/2,-ray_cyl_t/2,0])
        rotate([-90,0,90])
        hull () {
            translate([0,0,0])
                cylinder(r=ray_cyl_t,h=haut_cyl_t);
            translate([haut_t,0,0])
                cylinder(r=ray_cyl_t,h=haut_cyl_t);
            translate([haut_t/2,haut_t,0])
                cylinder(r=ray_cyl_t,h=haut_cyl_t);
}
    }

module tri_equ() {
    polyhedron(points = [[0,0,0],[cot_tr,0,0],[cot_tr/2,sqrt(cot_tr*cot_tr-(cot_tr/2*cot_tr/2)),0],[cot_tr/2,(sqrt(cot_tr*cot_tr-(cot_tr/2*cot_tr/2)))/3,sqrt(cot_tr*cot_tr-(cot_tr/2*cot_tr/2))]],faces=[ [0,1,4],[1,2,4],[2,3,4],[3,0,4],[1,0,3],[2,1,3],[0,1,2],[0,2,3]]);

}

```


[User]
Hey, I'm looking to generate a customizable twisted polygon vase. I've seen a few examples online, and they look really cool, but I want to be able to control the parameters myself.

Essentially, the vase is made by extruding a regular polygon, and the twist is controlled by some seemingly magic number. I'm using OpenSCAD with the MCAD library (`regular_shapes.scad`) for the regular polygon function.

Here's what I want to be able to customize:

*   **Overall height of the vase:** I'd like to specify this in millimeters. Let's call this `vase_height`.
*   **Radius of the vase's base:** This will also be in millimeters and called `bottom_radius`. The top radius will always be equal to the bottom radius.
*   **Number of sides of the polygon:** This would define the base shape of the vase, and be an integer variable, let's call it `number_of_sides`.
*   **The "magic number" that controls the twist:** This is the tricky one. In the example I've been looking at, they call it `Na`. It seems to affect the amount of twist and create different shapes based on the value. It should be an integer. It would be great if I can have a way to either input this value directly, or have a random one generated each time. In that case, the range for random generation could be between 1 and 9999. There was another value, `Nb`, that always has to equal to Na, and another value called `number_of_sides2` that has to equal `number_of_sides`. These values are not important, but they have to be defined.
*  **Important**: The extrusion is done with a for loop, so if the height and `slice_layers` don't work right, it might not look right.

I guess the core idea is that the vase is created by layering many slices of extruded polygons, and each layer is slightly rotated and scaled. I'm not really sure how the "magic number" `Na` is affecting things exactly, but based on the examples I have, it is a key parameter in shaping the vase.

Could you generate the scad file for this? It should use the MCAD library for the regular polygon function and define all parameters with appropriate comments for each variable so I can easily change them. I'd really appreciate it!

[Assistant]
Magic-Customizable-Twisted-Polygon-Vase-Maker_V2.scad:
```
// Magic Customizable Twisted Polygon Vase Maker V2
// This started as..
// Customizable Twisted Polygon Vase - http://www.thingiverse.com/thing:270130/#files

use <MCAD/regular_shapes.scad>;

// Approximate Height of Vase(mm)
vase_height = 185;
//Approximate Radius of Vase (mm)
bottom_radius =50;

// The Vase is an extruded regular polygon - polygon type in the regular_shapes funciton
// - Side of extruded regular polygon (Best < 12)
number_of_sides = 5;

// USE THIS ONE WITH CUSTOMIZER
// Comment this out if using OpenSCAD, and uncomment OpenSCAD section below.
// - Use the slider to choose a value for NA
Random_Na = 8473; // [1:1:9999]

// Manually Define a Na Value
// - Overrides the slider above unless set to 0
Manual_Na = 0;

// New v2 Favorites - [May Print With Holes]
//@vase_height = 185;
//@bottom_radius = 50;
//4Side: 8459, 6639, 8980
//5Side: 7782, [7799] 244, [536], [2561], 587.5, 8473, 7728, 9332
//6Side: 4568, 9168, [7978], 4600, 5294, 6501.4
//7Side: 5423, 5423.3

// USE THIS ONE WITH OPENSCAD
// comment this out if using Customizer
// OpenSCAD chooses a random value for Na
//Random_Na = floor(rands(1,9999,1)[0]);

/* Start the Magic */
// set Na according to Value used above
Na = (Manual_Na==0) ? Random_Na : Manual_Na;
echo(Na);

// Top and bottom radius need be be equal for vase to work!
// Bottom circumradius (mm from center to corner)
// Top circumradius (mm from center to corner)
top_radius = bottom_radius;
// These also need to be equal, for the Magic to work :-)
Nb = Na;
number_of_sides2 = number_of_sides;

// This was all created at random, i can't follow the logic
slice_layers = (.5*number_of_sides)*((Na + Nb)/Nb);
slice_layers2 = (.5*number_of_sides)*((Na + Nb)/Na);

// Could have something to do with twist of top surface relative to bottom.
top_rotation = (.5*number_of_sides)*number_of_sides * (Nb/(.5*number_of_sides)) * slice_layers ;

// Could have something to do with twist of top surface relative to bottom.
bottom_rotation = (.5*number_of_sides)*number_of_sides2 * (Na/(.5*number_of_sides)) * slice_layers2;

top_scale = top_radius / bottom_radius;

// making a vase top to bottom
for ( k = [1 : (vase_height/slice_layers) : vase_height] ){
for ( i = [1 : (vase_height/slice_layers) : vase_height] ){
    rotate([0, 0, i]) {
        translate([0,0,i]) {
            hull() {
                mirror([i,i,0]) {
                    linear_extrude(
                            height = (vase_height/slice_layers),
                            twist  = top_rotation/(vase_height/slice_layers),
                            slices = slice_layers,
                            scale  = top_scale)
                    union() {
                        reg_polygon(
                                sides  = number_of_sides,
                                radius = bottom_radius);
                        reg_polygon(
                                sides  = number_of_sides2,
                                radius = bottom_radius);
                    } //union
                } //mirror
            } //hull
        } // translate
    } // rotate

}; // for i

// Doing something in the reverse of the loop above
//for ( j = [vase_height : -(vase_height/slice_layers2) : 0] ){
for ( j = [1 : (vase_height/slice_layers) : vase_height] ){
    rotate([0, 0, j]) {
        translate([0,0,j]) {
            hull() {
                mirror([0,j,0]) {
                    linear_extrude(
                            height = (vase_height/slice_layers2),
                            twist  = bottom_rotation/(vase_height/slice_layers2),
                            slices = slice_layers2,
                            scale  = top_scale)
                    union() {
                        reg_polygon(
                                sides  = number_of_sides2,
                                radius = bottom_radius);
                        reg_polygon(
                                sides  = number_of_sides,
                                radius = bottom_radius);
                    } //union
                } //mirror
            } //hull
        } // translate
    } // rotate
}; // for j
}; // for k

```


[User]
Okay, I'd like to create a customizable Christmas tree ornament that can be personalized with a letter. The ornament should be a tree shape with a letter cut out of it, and a small topper on the very top.

Here's how I envision it:

**Tree Shape:**

*   The tree shape should be a stylized, somewhat symmetrical tree. I'm thinking something like a polygon that has a wider base and tapers upwards to a point, but with a few zig-zags to make it look more like a tree than a triangle. I like the specific polygon coordinates in the attached `christmas_tree.scad`, but don't feel required to use them, if something more general is easier. I'd like to be able to control the overall height and thickness of the tree (linear extrude height).
*   There should be a small cylindrical topper centered on the very top of the tree. This topper should be composed of a cylinder with a radius and height, with a smaller cylinder of the same height cut from the center to form a kind of ring.

**Letter Cutout:**

*   A letter of the alphabet should be cut out of the face of the tree, a bit above the base.
*   I want to be able to easily specify the letter to cut out, so this should be a parameter.
*   I need to control the vertical position of the letter, but in relation to the tree's dimensions. It would be great if it could use a `char_pos` number that was relative to the tree's height. For example a value of 0.5 would put it at half the height of the tree's base, not absolute coordinates.
*   I'd also like the letter to use an Arial Bold font, but that should be configurable too. I'd like a default value, but I want a parameter.

**Parameters:**

I'd like these parameters to be easily adjustable:

*   `tree_height`: Total height of the tree shape.
*   `tree_thickness`: Thickness of the tree (linear extrude height).
*   `char_pos_frac`: A fractional position of the letter. This value should be between 0 and 1. 0 is on the bottom, 1 is on top.
*   `character`: The letter to cut out of the tree.
*   `font_name`: The font to use for the letter, including style. Defaults to Arial Bold.
*   `topper_radius`: Radius of the outer cylinder of the topper.
*   `topper_inner_radius`: Radius of the inner cylinder of the topper.
*   `topper_height`: Height of the topper.
*   `number_of_sides`: Number of sides for the cylinder, and the difference.

**Output:**

I'm looking for a single .scad file that generates the tree with the letter cutout and topper.

Let me know if you have any questions!

[Assistant]
christmas_tree.scad:
```
//CUSTOMIZER VARIABLES
character = "C";	//	[A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z]
char_pos = 7.5; // Character Position [6:9]
//CUSTOMIZER VARIABLES END

difference(){

linear_extrude(height = 5)
polygon(points = [ [10, 0], [10, 6],[0, 6],[4, 14],[1, 14],[5, 21],[2.65, 21],[12.4, 38.1],[12.4, 38.1],[22, 21],[19.7, 21],[24, 14],[21, 14],[25, 6],[15, 6],[15, 0]]);

translate([char_pos,13,0])
linear_extrude(height = 5)
   text(character,font="Arial:style=Bold");
}
translate([12.5,40.5,0])
difference(){
cylinder(r=4,h=5,$fn=50);
cylinder(r=2,h=5,$fn=50);
}

```


[User]
I'd like to create a small sign that I can hang up, and I'd like to be able to customize it. Here's what I'm thinking:

The sign should have a rectangular base plate with a small ring at the top, centered, that I can use to hang it up. The base plate should have adjustable width and depth, and the ring should have an adjustable diameter. The ring should be created by subtracting a smaller cylinder from the center of a larger one, both with the same height.

On the base plate, I want to add two lines of text, stacked vertically, with each line centered and configurable. I need to be able to specify the text for each line, the font size, and the height of the extruded text. The text should be extruded upwards from the base plate. It also needs to be able to change the placement of the text.

I’m thinking I’ll need to have a module for the base plate, a module for the hanger, and another module to create the text on the plate. And then, of course, a main module to put everything together. I think a global variable for the base plate thickness would be useful, as would the use of `$fn` to make the circles smooth.

Could you generate OpenSCAD code for this, including all necessary modules? I think it'd also be useful to add the ability to specify different colors for the plate and text, as well. I don’t need any specific libraries for this, just vanilla OpenSCAD.

[Assistant]
GotFilament.scad:
```
//
//    GotFilament.scad
//
//    EvilTeach
//
//    12/13/2015
//
//
//

// This controls the thickness of the base plate, and the hanger.
thickness  =   0.3;

// This controls the width of the base plate.
baseWidth  =  80.0;

// This controls the depth of the base plate.
baseDepth  =  50.0;

// This is the diameter of the hanger ring.
ringDiameter = 5.0;

// This is the top line of text
text1      = "Got";

// This is the bottom line of text
text2      = "Filament?";

// This is how high above the base plate that the text should extend.
textHeight = 1.0;

// This is the font size for the text.
fontSize   = 10;

// I like round
$fn = 360;

module hanger()
{
    ringRadius = ringDiameter / 2;

    translate([0, baseDepth + ringRadius - 1, 0])
        difference()
        {
            cylinder(r = ringRadius,     h = thickness);
            cylinder(r = ringRadius - 1, h = thickness);
        }
}

module base_plate()
{
    color("purple")
    {
        hanger();
        translate([-baseWidth / 2,0 , 0])
            cube([baseWidth, baseDepth, thickness]);
    }
}

module witty_saying()
{
    color("white")
        translate([0, baseDepth * 0.60, thickness])
            linear_extrude(textHeight)
                text(text1, size=fontSize, halign = "center");

    color("white")
        translate([0, baseDepth * 0.25, thickness])
            linear_extrude(textHeight)
                text(text2, size=fontSize, halign = "center");
}

module main()
{
    // Force the pieces into the middle of the build plate.
    translate([0, -baseDepth / 2, 0])
    {
        base_plate();
        witty_saying();
    }
}

main();
```


[User]
Hey, I'm looking to design a balance board and I'd like to do it with OpenSCAD. I saw this design online, and it's almost perfect, but I need something a little different, and I think it's easier to start over than modify this.

Basically, I need a rounded, almost half-sphere shaped piece that I can screw to a flat board. The important thing is that the dome part is on the bottom, so it's what contacts the ground, not on top where I'm standing.

Here are the details:

*   **Shape:** It should be a half-sphere, but with an option to "scrunch" it down, so it's not a perfect half-sphere but more of a flattened dome. I'd like a parameter for how much to scrunch it - probably a percentage. The original design called this the "scrunch\_factor," which seems good.
*   **Hollow/Solid:**  It should be able to be either solid or hollow, with a parameter to choose. If it's hollow, I need a parameter to set the wall thickness. There should also be a hole on the flat part of the shape for filling it if it is hollow. That fill hole needs its own radius parameter.
*   **Mounting:** I need mounting holes for screws to attach the dome to the board. I need to control the number of screws, the screw hole diameter, the screw head diameter (and optionally a screw head taper height if it's a wood screw). It should work with both regular machine screws and tapered head wood screws. I also want a little bit of wiggle room around the screw head, so I would need a parameter for that as well. There should be a parameter for the mount height, too. In the original design, this was the 'mount\_height' variable. The screw holes should be evenly spaced around the edge of the flat part of the dome.
*   **Size:** I need a parameter to control the overall diameter of the sphere. There needs to be a resolution parameter so that we can control the smoothness of the sphere.

I am not concerned with libraries right now, and would prefer if you made all the modules in the file or files themselves.

I think that's everything, thanks!

[Assistant]
balance-board5-hollowable.scad:
```
/*
Creates a rounded half-sphere with mounting holes
that can be screwed to a board to create a balance board.
*/

// Whether the dome should be hollow or not
hollow = true;
// If hollow, how thick to make the walls:
outer_wall_thickness = 7;
// Width of rounded shape in millimeters.
sphere_diameter = 150;
// Factor to reduce rounded shape height by.  Lower is easier.
scrunch_factor = 0.75;
// The diameter of the screws you intend to use.
screw_diameter = 4;
// The area left for of the heads of the screws you intend to use.
screw_top_diameter = 7.5;
// Whether this is a wood screw with a tapered head.
wood_screw = true;
// Height of the tapered portion of the screw head.
screw_head_taper_height = 3;
// Amount of space in the hole around the screw's head.
screw_wiggle_room = 1.5;
// The number of screws you'd like to mount with.
screw_count = 5;
// The thickness of the shape that the screws have to grip to.
mount_height = 5;
// Number of facets on each rounded surface
resolution = 100;
// If hollow, the size of the fill hole at the bottom
fill_hole_radius = 15;

// Computed Properties
sphere_radius = sphere_diameter / 2;
screw_offset = sphere_radius - (screw_top_diameter);
screw_increment = 360 / screw_count;
screw_top_radius = screw_top_diameter / 2;
screw_radius = screw_diameter / 2;

// cutBlock is a block big enough to slice chunks off the sphere.
// It is oversized in x + y, so it is only suitable for Z-axis slicing.
module cutBlock() {
	cube([
		sphere_diameter,
		sphere_diameter,
		sphere_diameter * scrunch_factor,
	], center=true);
}

module ball(radius) {
	scale([1, 1, scrunch_factor])
	sphere(r=radius, $fn=resolution);
}

module halfSphere() {
	difference(){
		ball(sphere_diameter / 2);

		translate([0, 0, sphere_diameter * scrunch_factor * -0.5])
		cutBlock();
	}
}

module hollowHalfSphere() {
	difference () {
		halfSphere();

		ball((sphere_diameter - (outer_wall_thickness * 2)) / 2);
	}
}

module mountHoles() {
	for(i=[0:screw_count]) {
		rotate([0, 0, screw_increment * i])
		mountHole(screw_offset);
	}
}

module mountHoleSpaces() {
	for(i=[0:screw_count]) {
		rotate([0, 0, screw_increment * i])
		mountHoleSpace(screw_offset);
	}
}

module mountHoleSpace(offset) {
		// Wide cylinder down to screw hole
	translate([offset, 0, 0])
	cylinder(r=screw_top_radius + screw_wiggle_room + (outer_wall_thickness/2), h=sphere_radius, $fn=resolution);
}

module mountHole(offset) {

	if (wood_screw) {

		// Wide cylinder down to screw hole
		translate([offset, 0, mount_height + screw_head_taper_height])
		cylinder(r=screw_top_radius + screw_wiggle_room, h=sphere_radius, $fn=resolution);

		// Tapered wood screw cone
		color("green")
		translate([offset, 0, mount_height])
		cylinder(r1=screw_radius, r2=screw_top_radius, h=screw_head_taper_height, $fn=resolution);

	} else {

		// Wide cylinder down to screw hole
		translate([offset, 0, mount_height])
		cylinder(r=screw_top_radius + screw_wiggle_room, h=sphere_radius, $fn=resolution);
	}

	// Screw hole itself
	translate([offset, 0, 0])
	cylinder(r = (screw_diameter / 2), h=sphere_radius, $fn=resolution);
}

module bottomPlate() {
	difference() {
		intersection() {
			color([1,0,0], 0.5) {
				cylinder(r=sphere_radius, center=true, $fn=resolution);
			}
			halfSphere();
		}
		cylinder(r=fill_hole_radius, center=true);
	}
}

if (hollow) {
	difference() {
		union() { // The positive space

			color([0,1,0], 0.5) {
				hollowHalfSphere();
				intersection() {
					halfSphere();
					mountHoleSpaces();
				}
			}

			bottomPlate();
		}

		// The negative space
		mountHoles();
	}

} else {  // Non-hollow version of the design:
	difference(){
		halfSphere();
		color("blue")
		mountHoles();
	}
}

```


[User]
I'd like to design a pill marker, something that sits in a pill box compartment to indicate which day of the week a pill should be taken. I have a basic idea but I'd like something more flexible.

The marker should be a rectangular prism with text on two opposite faces, indicating the day. I’d like to be able to adjust the overall dimensions of the prism (length, width, and height), as well as the font, size, and content of the text on both sides. It'd be ideal if the text remained centered on each face, and the text faces were easily mirrored along the length of the prism. I'm imagining it needs to be pretty thin so the pill container will still close.

I need the code to be written in OpenSCAD, and I would like a single .scad file for this, please. I don't require any additional libraries.

[Assistant]
TablettenMarker.scad:
```
$fn=30;

//Masse (nicht zu knapp!):
//Mass, not too short
x=27; //Laenge
y=20; //Breite
z=1.5;  //Hoehe - 1.5 dürfte das Minimum sein
f="Arial";
s=12;  //Size
text1="Su";
text2="We";

difference() {
    //Aussenkoerper
    cube([x,y,z],false);
    translate([x/2,(y-s)/2,4*(z/5)]) {
        cube([1,1,0],false); //nur Ausrichtung
        linear_extrude(height = z) {
        text(text1,font=f,s,halign="center");
        }
    }
    //die Berechnung stimmt nicht so ganz... aber irgendwie passts schon
    translate([x/2,(y-s)/2,-(z/3)*2]) {
        cube([1,1,0],false); //nur Ausrichtung
        mirror([1, 0, 0]) {
            linear_extrude(height = z) {
                text(text2,font=f,s,halign="center");
            }
        }
    }
}

```


[User]
I'd like to create a series of interlocking star-shaped rings, kind of like a kinetic sculpture or a Christmas ornament, using OpenSCAD. I have a basic idea, but I need help fleshing out the code.

Here’s what I’m thinking:

*   **Core Structure:** I want a set of nested star-shaped rings that fit inside each other. Each ring should be a distinct star shape, not just a circle, and they need to rotate around a central axis. I should be able to specify how many points each star has (they'll all have the same number of points) and how many rings there should be.

*   **Dimensions and Parameters:**
    *   There needs to be an outer radius for the outermost star and an inner radius for the innermost star, with each successive star ring being smaller. Let's start with `outerR1` for the outermost radius and `innerR1` for the innermost radius.
    *   I need to specify the thickness of each star ring (`thick`) and the height (`height`). The stars will be a 2D shape extruded to a height, but will be able to rotate in a plane.
    *   I need a parameter for the radial difference (`clearance`) between the rings. Each successive ring's outer radius should shrink by a multiple of clearance.
    *   There needs to be a pin-and-hole system between the rings so that they can link up. I'll also need a `pin_clearance` for the pin-hole fit.
    *   Let's also include a `bevel` parameter to round off the edges of the stars.

*   **Pin and Hole System:**
    *   Each star should have a pin on one "arm" of the star, that inserts into a hole on the next inner star. Similarly, the innermost ring should have an inner pin, and the outer ring an outer pin. The pins and holes should fit together using the `pin_clearance` to allow the stars to rotate.
    *   The pins should be cylindrical, with some rounding at the ends.
    *   If the number of star points is even, the rings should be rotated slightly relative to each other to make them visually distinct (not stacked straight on top of each other).

*   **Center Connection:** In addition to the nested rings, there needs to be some kind of small center connector to hold everything together. This could be a cylinder, possibly with a bevel, that can attach to one of the star arms. It would be nice if that connector was optional (a `do_loop` boolean), though.

*   **Modules Needed:**
    *   A `star()` module that creates a single star shape, given the points, radii, thickness, height, and bevel.
    *   A `star_ring()` module that uses the `star()` module, and adds the pins and holes.
    *   A `star_assembly()` module that puts the rings together, calculates the proper positions, and adds the center connector.

*  **Usage:**
  * In the final `star_assembly()` function, there should be a loop that creates the nested star rings.  It should handle that some of the star rings will have *only* an outer pin, *only* an inner pin, and some will have both.
  *  I need to be able to turn the "loop" or connector on or off.
  *  I need to be able to quickly visualize the shape (e.g. a quick `difference()` to cut out a huge cube, if it works).

*  **Libraries:** I don't need to use any external libraries for this. I prefer standard OpenSCAD primitives.

I want this to be fully parametric so that I can easily experiment with different numbers of points, rings, and sizes. Thanks!

[Assistant]
star.scad:
```
points = 6;
num = 7;

outerR1 = 20;
innerR1 = 13;
clearance = 0.75;

thick = 4;
height = 6;
pin_clearance = 0.25;
corner_fudge = 0.8;
bevel = 0.7;
do_loop=true;

innerRd = thick+clearance*1;
outerRd = innerRd*(outerR1/innerR1);
rotation = 360/points;
isEven = (points%2) ? false:true;

star_assembly();
*difference() {
	star_assembly();
	translate([-200,-200,0]) cube(400);
}
//star(points,outerR1,innerR1,thick,height,0.5,false);
//star(points,outerR1-outerRd,innerR1-innerRd,thick,height,0.5,false);
//star_ring(points, outerR1, innerR1, innerHole=false, outerPin=true, innerPin=true);

module star_assembly() {
	union() {
		for (i = [0:num-1]) {
			outerPin = (i==0) ? false:true;
			innerPin = (i==num-1) ? false:true;
			limit_test = (outerR1-outerRd*i<=thick/2 || innerR1-innerRd*i<=thick/2) ? false:true;
			//echo(i,outerPin,innerPin);
			if(limit_test==true) rotate(-rotation*i)
				star_ring(points=points,
					outerR=outerR1-outerRd*i,
					innerR=innerR1-innerRd*i,
					innerHole=false,
					outerPin=outerPin,
					innerPin=innerPin);
		}
		if(do_loop==true) {
			twist = (isEven==true) ? rotation : 0;
			rotate(twist)
				translate([outerR1+thick,0,0])
					difference() {
						hull() {
							cylinder(d=thick*2,h=height-bevel*2,center=true);
							cylinder(d=thick*2-bevel*2,h=height,center=true);
						}
						cylinder(d=thick,h=height+1,center=true);
					}
		}
	}
}

module star_ring(points, outerR, innerR, innerHole, outerPin, innerPin) {
    pin = (height>thick) ? thick/2 : height/2-clearance;
	trans = (isEven==false) ? outerR : innerR;
	//echo("A",outerPin,innerPin);
	difference() {
		union() {
			star(points,outerR,innerR,thick,height,bevel,innerHole);
			if (outerPin==true) rotate(-rotation/2) difference() {
				trans_choice = (isEven==false) ? -trans-clearance/2-thick*(outerR1/innerR1-1): -(trans+thick/2+clearance);
				hull() {
					translate([innerR+thick/2+clearance,0,0])
						rotate([0,90,0])
							cylinder(r1=pin, r2=0, h=pin, $fn=12);
					translate([trans_choice,0,0])
						rotate([0,90,180])
							cylinder(r1=pin, r2=0, h=pin, $fn=12);
				}
				translate([innerR/2-trans/2,0,0])
					cube([innerR+trans,pin*3,pin*3],center=true);
			}
		}
		if (innerPin==true) {
			trans_choice = (isEven==false) ? -trans+thick+clearance: -trans+thick/2;
			rotate(-3*rotation/2) hull() {
				translate([innerR-thick/2,0,0])
					rotate([0,90,0])
						cylinder(r1=pin+pin_clearance, r2=0, h=pin+pin_clearance, $fn=12);
				translate([trans_choice,0,0])
					rotate([0,90,180])
						cylinder(r1=pin+pin_clearance, r2=0, h=pin+pin_clearance, $fn=12);
			}
		}
	}
}

module star(points, outer, inner, thick, height, bevel=1, solid=true) {
	//echo(outer,inner);
	po = [outer,0];
	pi = [inner * cos(180/points),inner * sin(180/points)];
	//echo(po,pi);
	d=thick;
	h=height;
	for(i = [0:points-1])
		rotate(360/points*i) {
			union() {
				mir([0,1,0]) hull() {
					translate(po) {
						cylinder(d=d-bevel*2, h=h, center=true);
						cylinder(d=d, h=h-bevel*2, center=true);
					}
					translate(pi) rotate(180/points) {
						cylinder(d=d-bevel*2, h=h, center=true);
						cylinder(d=d, h=h-bevel*2, center=true);
					}
					if(solid==true)
						cylinder(d=d, h=h, center=true);
				}
				if(isEven==false) translate([outer-thick+corner_fudge,0,0])
					hull() {
						cube([d,d*1.2,h-bevel*2],center=true);
						cube([d-bevel*2,d*1.2,h],center=true);
					}
			}
		}
}

module mir(plane=[1,0,0]) {
	children();
	mirror(plane)
		children();
}
```


[User]
Hey, I'm looking to create a modular shelving system based on hexagons, and I'd like to use OpenSCAD to generate the necessary parts. I've seen some designs on Thingiverse but want something highly customizable for different material thicknesses and screw sizes.

Essentially, the system will be based around brackets that connect to hexagonal hubs. These brackets will hold wooden shelves.

Here are the key features I need:

1.  **Parametric Design:** I need to be able to adjust the following parameters, ideally as variables at the beginning of the file:
    *   `shelf_thick`: The thickness of the shelves (e.g., for 1/4" ply, this would be around 6.35 mm).
    *   `wall_thick`: The thickness of the bracket walls (this affects print time and strength).
    *   `wall_length`: Length of the bracket arms that the shelves rest on.
    *  `depth`: depth of the bracket.
    *   `screw_dia`: The diameter of the screw used to attach the brackets.
    *   `corner_rad`: Radius of rounded corners on the bracket parts.
    *   `floor_thick`: thickness of the bottom bracket pieces (if "closed").
    * `closed`: Boolean to indicate whether the bracket should be "closed" (with a floor). This can be a true/false toggle.

2.  **Bracket Design:**
    *   Each bracket should consist of two walls forming a "U" shape, designed to hold a shelf.
    *   There should be a hole for a screw to attach the bracket.
    *   The bracket should be configurable as either open or closed. When "closed", there should be a floor to give extra support.
    *   The shape of the bracket should be considered as part of an equilateral triangle (as derived in the given code), with the center point used for a hub.
    * The bracket should be generated as a `wall()` module with the correct thickness and hole, and called by a `bracket()` module, and finally used in the top-level modules.

3.  **Hub Design:**
    *   The hub will connect multiple brackets in a hexagonal pattern.
    *   The hub should have a shape that matches the inside of an equilateral triangle defined by the bracket thickness, depth, and wall thickness.
    *   The hub should be a `hub()` module that is used as a building block for the full bracket assemblies.

4. **Bracket Assemblies:**
    * I need at least three modules combining hubs and brackets:
        * A `threewaybracket()` that combines a hub and three brackets (at 120 degree intervals)
        * A `twowaybracket()` that combines a hub and two brackets (at 120 degree intervals)
        * A `twowaybracket_leg()`: This is like the `twowaybracket()` but one of the brackets is replaced by a tapered cylindrical `bracketleg()` to form a support foot. The base of the support foot should be a cylinder, and the top should be a smaller cylinder that extends from the bracket. This will be used to support shelves at floor level.
    * A `twowaybracket_hanger()`: This is like `twowaybracket()` but one bracket is replaced with a `hanger()` module that has a rounded box with a central hole, and a box to allow it to hang from a wall, like a picture frame bracket.
    * A `twowaybracket_tensioner()`: This is like `twowaybracket_hanger()` but the hanger is on the opposite side of the `hub()` from the other brackets. This will be used to tie the shelf array together.

5.  **Rounded Corners:** The brackets and support feet should have rounded corners using the `roundedBox()` module as found in the given example code.

6.  **Specific Library:** The code should utilize a `roundedBox()` module. Please make sure the code includes this, or uses a suitable library for creating rounded boxes if available in an external library. I do not need separate files for each library.

Can you generate the OpenSCAD file(s) with these specifications? I'm looking for a modular and flexible solution that I can adjust to different materials and needs. I'm hoping for code that I can easily copy and paste into OpenSCAD. I think that the given code is a good start, but I need the entire file to be generated from scratch.

[Assistant]
hex_shelves_v3_custom.scad:
```
/* hexagonal shelving clips
Gian Pablo Villamil
May 2015

Clips designed to hold wooden shelves in a hexagonal array

Default to work with 3/4 inch plywood

*/

shelf_thick = 5; // 3/4 inch in mm, thickness of wood
wall_thick = 3; //thickness of bracket sides
wall_length = 25; // length of the bracket
depth = 25 ; //epth of the bracket
bracket_thick = shelf_thick+wall_thick*2;
screw_dia = 4.75; // #8 size screw is 4.75
tri_height = sqrt(pow(bracket_thick,2)-pow(bracket_thick/2,2)); // calculate the height of an equilateral triangle
centroid = tan(30) * (bracket_thick/2);
closed = false;
corner_rad = 1;
floor_thick = 3;
$fn=16;

echo(centroid);

module wall() {
    translate([shelf_thick/2,0,0])
    translate([0,0,0])
        difference() {
                                                                   //cube([wall_thick,wall_length,depth]);
            union() {
                translate([wall_thick/2,wall_length/2,depth/2]) roundedBox([wall_thick,wall_length,depth],corner_rad,true);
                cube([wall_thick,2,depth]);
            };
            translate([wall_thick/2,wall_length/2,depth/2])
            rotate([0,90,0])
            cylinder(h=wall_thick+1,d=screw_dia,center=true,$fn=16);
        }
    };

module bracket() {
    translate([0,centroid-0.1,0]){
        wall();
        mirror([1,0,0])
        wall();
        if (closed ) {
        translate([0,wall_length/2,floor_thick/2]) roundedBox([bracket_thick,wall_length,floor_thick],corner_rad,true); }
        };
    };

module bracketleg() {
    translate([0,centroid-0.1,0]){
        union() {
            wall();
            translate([-depth/5+0.1,wall_length/2,depth/2])
            rotate([0,270,0])
            cylinder(r1=depth/2.5,r2=depth/6,h=depth/2.5);
        }
        mirror([1,0,0])
        wall();
        if (closed ) {
        translate([0,wall_length/2,floor_thick/2]) roundedBox([bracket_thick,wall_length,floor_thick],corner_rad,true); }
        };
    };

module hanger() {
    translate([0,centroid-0.1+bracket_thick/2,floor_thick/2])
    difference() {
    union() {
        roundedBox([bracket_thick,bracket_thick,floor_thick],bracket_thick/2,true,$fn=32);
        translate([0,-bracket_thick/4,0]) cube([bracket_thick,bracket_thick/2,floor_thick],center=true);
    }
    cylinder(h=floor_thick+1,d=screw_dia,center=true);
}
}

module hub() {
    difference() {
    translate([0,centroid,0])
    linear_extrude(height=depth) {
        polygon(points=[[-bracket_thick/2,0],[0,-tri_height],[bracket_thick/2,0]]);}
        translate([0,0,-0.5]) cylinder(r=shelf_thick/4,h=depth+1);

        }
    }

module threewaybracket() {
    union() {
        hub();
        bracket();
        rotate([0,0,120]) bracket();
        rotate([0,0,240]) bracket();
        }
    };

module twowaybracket() {
    union() {
        hub();
        bracket();
        rotate([0,0,120]) bracket();
        }
    };

module twowaybracket_leg() {
    union() {
        hub();
        bracket();
        rotate([0,0,120]) bracketleg();
        }
    };

module twowaybracket_hanger() {
    union() {
        hub();
        hanger();
        rotate([0,0,120]) bracket();
        rotate([0,0,240]) bracket();
        }
    };

module twowaybracket_tensioner() {
    union() {
        hub();
        rotate([0,0,180]) translate([0,centroid,0])
        hanger();
        rotate([0,0,120]) bracket();
        rotate([0,0,240]) bracket();
        }
    };
    // Library: boxes.scad
// Version: 1.0
// Author: Marius Kintel
// Copyright: 2010
// License: BSD

// roundedBox([width, height, depth], float radius, bool sidesonly);

// EXAMPLE USAGE:
// roundedBox([20, 30, 40], 5, true);

// size is a vector [w, h, d]
module roundedBox(size, radius, sidesonly)
{
  rot = [ [0,0,0], [90,0,90], [90,90,0] ];
  if (sidesonly) {
    cube(size - [2*radius,0,0], true);
    cube(size - [0,2*radius,0], true);
    for (x = [radius-size[0]/2, -radius+size[0]/2],
           y = [radius-size[1]/2, -radius+size[1]/2]) {
      translate([x,y,0]) cylinder(r=radius, h=size[2], center=true);
    }
  }
  else {
    cube([size[0], size[1]-radius*2, size[2]-radius*2], center=true);
    cube([size[0]-radius*2, size[1], size[2]-radius*2], center=true);
    cube([size[0]-radius*2, size[1]-radius*2, size[2]], center=true);

    for (axis = [0:2]) {
      for (x = [radius-size[axis]/2, -radius+size[axis]/2],
             y = [radius-size[(axis+1)%3]/2, -radius+size[(axis+1)%3]/2]) {
        rotate(rot[axis])
          translate([x,y,0])
          cylinder(h=size[(axis+2)%3]-2*radius, r=radius, center=true);
      }
    }
    for (x = [radius-size[0]/2, -radius+size[0]/2],
           y = [radius-size[1]/2, -radius+size[1]/2],
           z = [radius-size[2]/2, -radius+size[2]/2]) {
      translate([x,y,z]) sphere(radius);
    }
  }
}

//twowaybracket();
//twowaybracket_hanger();
//twowaybracket_leg();
//
twowaybracket_tensioner();

//threewaybracket();
// bracket();
// hub();
```