[User]
I'm looking to create a model for a small blower setup, and I need some help generating the OpenSCAD code. The basic idea is a ring with a blower attached to its side. The ring will have a series of air jets pointing inward, and I'd like to be able to adjust the jet's drop, their quantity, and the ring and blower dimensions. I'd also like the option of having two blowers, mirrored on either side of the ring.

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

**Ring:**

*   `ringid`: Inner diameter of the ring.
*   `ringod`: Outer diameter of the ring.
*   `ringh`: Height of the ring.
*   `walls`: Thickness of the outer ring wall.
*   `iwalls`: Thickness of the inner part of the ring near the blowers (twice `walls` by default, but would be good to control that too).
*   `bwalls`: Thickness of the bottom wall of the ring.

**Blower:**

*   `bloweridx`: Inner x-dimension of the blower mouth.
*   `bloweridy`: Inner y-dimension of the blower mouth.
*   `blowerh`: Height of the blower body.
*   `blowerwall`: Thickness of the blower wall.
*   `boolmirror`: A boolean to mirror the blower, creating a second blower on the opposite side of the ring. Default to 0 or false, so that no mirrored blower is produced.

**Air Jets:**

*   `pipedrop`: Distance in mm below the bottom surface of the ring where the jets are aimed.
*   `piper`: Radius of the air jets closest to the blower.
* `piper2`: Radius of the air jets furthest from the blower (the jets will smoothly transition from `piper` to `piper2`).
*   `pipenum`: Number of air jets around the ring.

**Blower Placement:**

*   The blower should connect to the side of the ring, with the connection area being flush with the ring's inner wall (after subtracting `iwalls`).
*   There should be an option to have the blower extend past the edge of the ring. This would be useful to design a longer attachment area.
* The connection from the blower to the ring should be a simple rectangular extrusion that doesn't extend to the bottom of the ring, but rather to the bottom of the blower itself. The support structure should go all the way to the bottom.

**Other considerations:**

*   I'd like the code to be well-commented.
*   The `towercut` function should not cut into the ring itself, but only create a hole in the side for the blower to push into.

I think that's everything! Let me know if you have any questions or need more details.

[Assistant]
blower.scad:
```
ringid = 39;
ringod = 60;
ringh = 7.5;

//ring walls
walls = 1.5;
iwalls = walls*2; //inner wall
bwalls = 1; //bottom wall

//id of blower
bloweridx = 17.5;//13;
bloweridy = 12.5;//17.5;
blowerh = 7.5;
blowerwall = 1.2;

blowerodx = bloweridx + blowerwall*2;
blowerody = bloweridy + blowerwall*2;

towertransxu = 0;
towertransyu = 0;

boolmirror = 0;

towertransx = max(towertransxu,0) + ringid/2 + iwalls-blowerwall*2;
towertrans = [towertransx, -(blowerody)/2 + towertransyu,0];

connectingx = max(0,towertransx -ringid/2 - iwalls);

//cooling pipe targets
pipedrop = 10;
piper = 2/2;
piper2 = 3.5/2;
pipenum = 23;

echo(towertransx);
echo((ringod/2 + blowerwall * 2));
bool_extend =
    (towertransx > (ringod/2 - 1 - walls - blowerwall * 2)) ?
        true : false;

echo(bool_extend);

$fn = 60;

module ringbody() {
	difference() {
		cylinder(h = ringh, r = ringod/2);
		cylinder(h = ringh+1, r = ringid/2);
	}
}

module ringcut() {
	translate([0, 0, bwalls])
	difference() {
		cylinder(h = ringh - walls- bwalls, r = ringod/2 - walls);
		cylinder(h = ringh+1, r = ringid/2 + iwalls);
	}

    height = sqrt(pow((ringid + ringod)/4,2) + pow(pipedrop + bwalls+ piper2,2));
	//pipes
	for (i = [0:360/pipenum:360]) {
		rotate([0, 0, i])

		translate([0,0,-pipedrop + piper - bwalls])
		rotate([0, atan((ringid/2 +iwalls)/(pipedrop + piper + bwalls)), 0])

        //rad = piper*(cos(i)+1)/2 + piper2*(-cos(i)+1)/2;
		#translate([0,0,0])cylinder(h = height,
        //r = piper
        r = piper*(cos(i)+1)/2 + piper2*(-cos(i)+1)/2
        );

	}

}

module towerbody() {
	//vert
	cube([blowerodx, blowerody, blowerh]);
	translate([blowerwall, blowerwall,0])
		cube([bloweridx, bloweridy , blowerh + 5]);

    if (bool_extend)
    {
        //horiz connectiom
        translate([-connectingx, 0,0])
            cube([connectingx,blowerody, ringh]);
    }

}

module towercut() {
	//vert
	translate([blowerwall*2, blowerwall*2,bwalls])
		cube([bloweridx - blowerwall * 2, bloweridy - blowerwall * 2, blowerh + 5]);

    if (bool_extend)
    {
        //horiz
        translate([-connectingx, blowerwall*2, bwalls])
            cube([connectingx+1 + blowerwall * 2,bloweridy - blowerwall*2, ringh - bwalls-walls]);
    }
}

module towerfinal() {
	translate(towertrans)
	{
		difference() {
			towerbody();
			towercut();
			translate(-towertrans)
			ringcut();
		}

        if (!bool_extend){
            //supports
            translate([blowerwall*2,blowerwall*2,0])
            {
                translate([0, bloweridy - blowerwall*2, 0])
                cylinder(h = ringh,  r = 0.7);
                cylinder(h = ringh,  r = 0.7);
            }
        }
	}
}

if(boolmirror != 0)
{
	mirror([1, 0, 0])
	towerfinal();

}

towerfinal();

difference() {
	ringbody();
	ringcut();

	translate(towertrans)
		towercut();

	if(boolmirror != 0)
	{

		mirror([1, 0, 0])
		translate(towertrans)
			towercut();
	}

    //cutout for viewing
    //translate([-60,-60,5])cube([120,120,10]);
}

//towerbody();

```


[User]
I'd like to create a parametric toothbrush holder with a clip that can attach to a bathroom fixture or shelf. The holder should consist of two main parts: a clip and a board. The clip will attach the structure to a surface, and the board will hold the toothbrushes.

For the clip, I need it to have two main sections: a top and a bottom. The top section should have a "U" shape formed with a horizontal bar at the top and the two arms to the bottom. The bottom section will essentially create a clamp with a horizontal bar underneath. I need the width of the clip to be adjustable in that the top part can be a different width than the bottom part. Both the height of the clip gap and the length of the clip should be parametric. Additionally, the thickness of the clip should also be parametric.

The board, which will hold the toothbrushes, should have a main body with adjustable width, height and thickness. It should also include a number of circular cutouts to hold toothbrushes. The number and diameter of these cutouts should be adjustable, and they should be evenly spaced across the width of the board. I'd like to have additional, smaller holes below the main cutouts to allow for water drainage.

The board should also include "holders" which will wrap around the outside of the board, attaching to the top and bottom surfaces. The length of these should be parametric, and each should be able to have a different thickness.

Finally, I'd like some rectangular cutouts in the main body of the board to save on material. The number and width of these should be adjustable, and they should be evenly spaced across the width of the board.

I'd like the entire design to be parametric, so I can adjust the dimensions to fit my needs. I'd also like to be able to choose whether to render just the clip, just the board, or both together. It should all be designed in a single OpenSCAD file.

[Assistant]
ToothbrushV2.scad:
```

/* [Common] */

part="all"; //[clip:Clip, board:Board, all: Clip and Board]

thickness=3; //[1:5]

/* [Clip] */
clip_length=50;
clip_gap=12;

/* [Toothbrush holder] */

//tbh = tooth brush holder
tbh_width=100;
tbh_height=100;

width_upper_clip_width=tbh_width;
width_lower_clip_width=tbh_width-20;

// How many toothbrushes?
tb_cutouts_num = 4;

// Holes for the toothbrushes, has to be lower than board_holder_length
tb_cutouts_diameter=20;

//to save some time/PLA/ABS
board_cutouts_num = 5;

//
board_cutouts_width=10;

board_upper_holder_thickness=thickness;
board_lower_holder_thickness=10;

// has to be higher than tb_cutouts_diameter
board_holder_length=30;

board_upper_holder_height=70;

/*   [Hidden]   */
$fn=100;

create_tooth_brush_holder();

module create_tooth_brush_holder() {
  if(part=="clip" || part=="all") {
    clip();
  }

  if(part=="board"|| part=="all") {
    holder();
  }
}

/*
  creates the clip
*/
module clip() {

  width_delta = width_upper_clip_width-width_lower_clip_width;

// top clip part
   hull(){
    translate([0,0,clip_gap+thickness])
      cube(
          size=[thickness,width_upper_clip_width,thickness/2],
          center=false
      );
    translate([clip_length,0,clip_gap+thickness])
      cube(
          size=[thickness,width_upper_clip_width,thickness],
          center=false
      );

        translate([thickness/2,0,clip_gap+thickness*1.5]) rotate ([-90,0,0]) cylinder(h=width_upper_clip_width,d=thickness);

  }

  translate([0,0,0]) {
    cube(
        size=[thickness/2,tbh_width,clip_gap+thickness],center=false
    );
  };

  //lower part of clip
  translate([0,width_delta/2,0]) {
      cube(
          size=[
              clip_length+thickness,
              width_lower_clip_width,
              thickness
          ],
          center=false
      );
  };
}

module holder() {
    difference() {
        translate([0,0,-tbh_height+clip_gap+thickness*2]) _holder_with_cutouts();
        clip();
    }
 }

module _holder_with_cutouts() {
     difference() {
      _board();
      translate([-board_holder_length/2,0,board_lower_holder_thickness/2]) _toothbrush_cutouts(tbh_width,tb_cutouts_num,tb_cutouts_diameter);
     }
 }

 module _toothbrush_cutouts(width,num,diameter) {
  echo (num);
  displacement=(width-num*diameter)/(num+1);
  color("blue")
  translate([0,diameter/2+displacement,0]) {
    for ( i = [0 : num-1] ){
      translate([0, (displacement+diameter)*i, 0]) {
        cylinder(h=tbh_height, d = diameter);
      }

      // small holes as drain
      translate([0, (displacement+diameter)*i, -board_lower_holder_thickness]) {
        cylinder(h=tbh_height, d = 4);
      }
    }
  }
}

module _board_cutouts(num,diameter) {
  width_single_cutout=diameter;
  displacement=(tbh_width-num*width_single_cutout)/(num+1);
  translate([-thickness/2,displacement,0]) {
    for ( i = [0 : num-1] ){
      translate([0, (displacement+width_single_cutout)*i, 0]) {
        cube(size=[thickness*2,width_single_cutout,tbh_height-clip_gap-thickness*4],center=false);
      }
    }
  }
}

module _board() {
  union() {
    difference() {
      cube(
          size=[
              thickness,
              tbh_width,
              tbh_height-thickness
          ],
          center=false
      );
      _board_cutouts(board_cutouts_num,board_cutouts_width);

    }
      //bottom
      single_brush_holder(0,board_lower_holder_thickness);
      //top
      single_brush_holder(board_upper_holder_height,board_upper_holder_thickness);
    }
 }

 module single_brush_holder(z_pos,board_holder_thickness){
  color("red")
  hull(){
    translate([-board_holder_length+thickness/2,thickness/2,z_pos]) cylinder(h = board_holder_thickness, d=thickness);
    translate([-board_holder_length+thickness/2,tbh_width-thickness/2,z_pos]) cylinder(h = board_holder_thickness, d=thickness);

    // small displacement (0.1), so there is really a connection bet
    translate([0,0,z_pos])   cube([thickness,thickness,board_holder_thickness]);

    // small displacement (0.1), so there is really a connection
    translate([0+0.1,tbh_width-thickness,z_pos]) cube([thickness,thickness,board_holder_thickness]);
  }
}

```


[User]
Hi, I'm looking to create a parametric design in OpenSCAD based on a Bezier curve. I've been playing around with some code that generates a cool-looking, twisting shape, but it suffers from gimbal lock issues, which I'd like to avoid.

Essentially, I want to define a Bezier curve using a set of control points, and then sweep a profile along this curve. The profile itself should also be parametrically defined. I'd like the design to have these specific parameters exposed:

*   **`controlpoints`**: The number of control points defining the Bezier curve. I'd like to be able to set an integer between 2 and 20, maybe even more if it's reasonable.
*   **`thickness`**: A maximum thickness for the swept profile. This thickness should vary along the curve based on the distance to the control point. I imagine the thickness being a scalar value between 5 and 50.
*   **`detail`**: The resolution of the curve. I need to control how often the profile is swept along the Bezier, something like the `detail` parameter in my old code. I'd like to specify this as a float, perhaps ranging from 0.01 to 0.5.
*   **`profile_sides`**: The number of sides on the swept profile. It should be an integer value of at least 3, allowing polygons like triangles, squares, pentagons etc.
*   **`profile_radius`**: The radius or size of the swept profile. A float between 1 and 12 should be okay.
*   **`profile_tangent_scale`**: A scaling factor for the profile's size relative to the curve's thickness. I would expect this to be in the range 1 to 10, as a float.
*   **`random_seed`**: A seed to randomize the control point locations. This will help generate consistent curves. I would like to specify this with an integer value between 1111 and 9999.

I envision the profile being swept along the curve and also being rotated to stay aligned to the path (avoiding gimbal lock, which was a problem for my previous attempt). I’d also like to generate a hull around the swept profile as a visual guide, so it can be clearly seen. The `thickness` parameter should determine the thickness of the base profile and the hull. It should vary along the length of the curve.

For the basic geometry, a simple polygon generated using the given `profile_sides` and `profile_radius` should do it. No need to use fancy or complex shapes for now, just simple polygons. I would like to be able to see both the base structure from the swept profile as well as the hull.

I'm not tied to any specific library, but if something would help to resolve the gimbal lock problem, then please feel free to use it.

Could you provide me with the necessary OpenSCAD code for this?

[Assistant]
bez.scad:
```
////////////////////
//Easy Bez-curve generator by Torleif Ceder 2015 Creative Commons - Attribution - Share Alike
////////////////////
// preview[view:south west, tilt:top diagonal]
//RandomSeed
seed = 1789; //[1111:9999]
part = 0; //[1,2,3,4,5]
controlpoints=5;//[1:20]
thickest=15;//[5:50]
detail = 0.02; //[0.01:0.001:0.5]
fn = 10; //[8:30]
rad=5;//[1:0.5:12]
tang=2;//[1:10]
//some random 4D points
v = [
  for(i = [0: controlpoints])[rands(0, 100*sign(i), 1)[0], rands(0, 100*sign(i), 1)[0], rands(0, 100*sign(i), 1)[0], rands(1, thickest, 1)[0]]
];
module yourmodule(i){
    //anything in this module will be copeid and rotatdet along curve (v) at (detail) intevall
    for (j=[0:360/rad:360]){
    rotate([j,0,0])translate([0,0, bez2(i, v)[3]*0.5])

        // anything here//////////////
        scale([0.5,0.5,1])rotate([0, 90, 0])cube( [bez2(i, v)[3]/2*tang,bez2(i, v)[3]/2,bez2(i, v)[3]/2], $fn= fn,center=true);
    //////////////////
        }
    }

//main call
bline(v);
// Bline module
module bline(v) {
     translate([bez2(0  , v)[0],bez2(0  , v)[1],bez2(0  , v)[2]])rotate(bez2euler (0,v))           yourmodule(0);
    for(i = [detail: detail: 1]) {

        translate([bez2(i  , v)[0],bez2(i  , v)[1],bez2(i  , v)[2]])rotate(bez2euler (i,v))           yourmodule(i);

      hull() {
        translate([bez2(i, v)[0], bez2(i, v)[1], bez2(i, v)[2]]) rotate(bez2euler(i, v)) rotate([0, 90, 0]) {
          sphere(d = bez2(i, v)[3], $fn = fn);
        };
        translate(t(bez2(i - detail, v))) rotate(bez2euler(i - detail, v)) rotate([0, 90, 0]) sphere(d = bez2(i - detail, v)[3], $fn = fn);
      }
    }
  }
  //The recusive
function bez2(t, v) = (len(v) > 2) ? bez2(t, [
  for(i = [0: len(v) - 2]) v[i] * t + v[i + 1] * (1 - t)
]): v[0] * t + v[1] * (1 - t);

//
function lim31(l, v) = v / len3(v) * l;

function len3(v) = sqrt(pow(v[0], 2) + pow(v[1], 2) + pow(v[2], 2));
// unit normal to euler angles
function bez2euler(i, v) = [0, -asin(bez2v(i, v)[2]), atan2(bez2xy(bez2v(i, v))[1], bez2xy(bez2v(i, v))[0])];

function bez2xy(v) = lim31(1, [v[0], v[1], 0]); // down xy projection
function bez2v(i, v) = lim31(1, bez2(i - 0.0001, v) - bez2(i, v)); // unit vector at i
function t(v) = [v[0], v[1], v[2]];

```


[User]
Hey, I'm looking to create a customizable connector piece for a construction system, and I'd like to use OpenSCAD. I've got a basic idea, but I'd like it to be parametric.

The core of the connector should be a cube, and I want to be able to attach struts to any of the six faces (north, south, east, west, up, down). Each strut should extend outwards from the center of its face. I need a way to specify which directions have struts - that part should be configurable via a string variable. The string should use `n`, `s`, `e`, `w`, `u`, and `d` to denote the directions, with uppercase variants `N`, `S`, `E`, `W`, `U`, and `D` indicating that a strut in that direction should also have a thin support strut. These support struts extend the length of the main strut.

So, for example a string like `"nsewud"` would give me struts on all sides of the cube *without* the support struts, while a string like `"NSEWUD"` would give all the same struts, plus the little supports. A string like `"nSwu"` would give me struts pointing north, south (with a support), west and up (no supports on the "n", "w" and "u"). The cube's center will be the origin.

The struts themselves should be rectangular prisms, slightly smaller than the face they extend from. They also have to have the center hollowed out, so it's a thin walled tube. The main struts should extend a specified length from the face of the central cube. The thin support struts extend along the main strut, and the length from the central cube to end of the support is also a specified length (usually longer than the main strut length). The support strut should be attached to the center of the back of the main strut along the long axis.

Could you generate an OpenSCAD file for this, and include all the parameters as variables at the top of the file to make it easy to modify. I will need:
-the size of the core cube (one parameter for the side length)
- the depth of the strut
- the size of the hole that goes through the strut
-the length of the strut
-the length of the support strut
-the variable that takes the directions string

I'm not picky about exact naming, but I'd like it to be pretty clear what is doing what.

I would also appreciate if you could organize the file such that the modules are defined at the top of the file (with variables) and the actual main model rendering code is below them. Also, let's try to keep it as one file.

[Assistant]
Connector_5x5_struts.scad:
```
// Combination of n,s,e,w,u,d (lower case = no support, upper case=with support)
directions = "nsewud";

cube([7,7,7],center=true);

if (search("u",directions)) stick(); //up
if (search("d",directions)) rotate ([180,0,0]) stick("yellow",false);
if (search("n",directions)) rotate ([-90,0,0]) stick("green",false);
if (search("s",directions)) rotate ([90,0,0]) stick("blue",false);
if (search("e",directions)) rotate ([90,0,90]) stick("white",false);
if (search("w",directions)) rotate ([90,0,-90]) stick("brown",false);

if (search("U",directions)) stick("red",true); //up
if (search("D",directions)) rotate ([180,0,0]) stick("yellow",true);
if (search("N",directions)) rotate ([-90,0,0]) stick("green",true);
if (search("S",directions)) rotate ([90,0,0]) stick("blue",true);
if (search("E",directions)) rotate ([90,0,90]) stick("white",true);
if (search("W",directions)) rotate ([90,0,-90]) stick("brown",true);

module stick(col="red",support=false) {
    color(col){
        translate ([0,0,10]) {
            if (support==true) translate ([0,0,0.5]) cube([0.1,7,13],center=true);
            difference() {
                cube([7,7,15],center=true);
                cube([5,5,17],center=true);
            }
        }
    }
}

```


[User]
Hey, I'm looking to create a customizable adapter for mini grease guns, designed to work with different sized tubes, like toothpaste tubes. I've got a basic idea, but I need help turning it into a parametric OpenSCAD model.

Essentially, I need a plunger and an adapter that will connect to the grease gun. The plunger needs to have a threaded section at one end to attach to the adapter, and a lip on the other end. The adapter needs to have a matching internal thread for the plunger, as well as an external thread to connect to the grease gun. The adapter also needs a section to hold the toothpaste tube.

For the plunger:
*   It should have a cylindrical base. The diameter of this should be a parameter that I can specify.
*   It should have a threaded section, using a metric thread like M8 x 10.
*   It should have an outer lip for ease of use.

For the adapter:
*   It should have an internal thread to match the plunger.
*   It should have an external thread (M8 x 16) to attach to the grease gun.
*   It should have a section that will hold the tube, including a lip to keep it in place. The diameter of this section, and the lip, should be parameters.

The design should also include some "support" elements to make it easier to print. I would like to have control over the wall thickness of the tube holder on the adapter.

I'm thinking I'll need at least two SCAD files, one for the plunger and one for the adapter. Can you generate these files for me? I know that I need the `Thread.scad` file for the threads from the description, so make sure to use that.

[Assistant]
plunger.scad:
```
include<..\thread\Thread.scad>

diam = 56.3;

difference(){
union(){
thread_in_ring(14.1,10,2);				// make a ring to enclose an M8 x 10 ISO thread with thickness 2 mm
thread_in_pitch(14.5,12,2.1);			// make an M8 x 10 thread with 1mm pitch

cylinder(h = 2,r = diam/2);
}
cylinder(h = 2.6,r = 10/2);
translate([-20,-20,9])
cube([40,40,10]);
}

//outside lip
difference(){
    cylinder(h = 8,r = diam/2);
    cylinder(h = 8+1,r = diam/2 - 1);
}
```
adaptor.scad:
```
include<..\thread\Thread.scad>

module bottom(){
//bottom
thread_in_ring(14.1,10,2);				// make a ring to enclose an M8 x 10 ISO thread with thickness 2 mm
difference(){
translate([0,0,-1.5])
thread_in_pitch(14.5,12,2.1);			// make an M8 x 10 thread with 1mm pitch
    translate([-20,-20,-10])
    cube([40,40,10]);
}

}

module topbody(){

//interface

cylinder(h = 2, r =17/2);

//top
thread_out_centre(14.4,16);				// make a centre for an M8 x 16ISO thread
thread_out_pitch(14,16,1.5);

}

//top with cutouts
module top(){
    difference(){
        topbody();
        translate([-20,-20,10])cube([40,40,40]);
        translate([0,0,0.5])cylinder(h = 30, r = 5);
    }
}

translate([0,0,10-2])top();

bottom();
////support
*cylinder (h = 0.5, r = 5 + 0.5);
*difference(){
    cylinder (h = 8, r = 5 + 0.1);
    cylinder (h = 10, r = 5 -0.5 );

}

//nut
difference(){
    cylinder (h = 5, r = 11.5, $fn = 6);
    cylinder (h = 11, r = 9 );

}

```
Thread.scad:
```
// ISO Metric Thread Implementation
// Trevor Moseley
// 20/04/2014

// For thread dimensions see
//   http://en.wikipedia.org/wiki/File:ISO_and_UTS_Thread_Dimensions.svg

$fn=60;
WrenchSizes=0;	// =0= Rolson sizes, =1=Fairbury sizes

//--demo functions--------------------------------------------------------------

//hex_bolt(10,16);						// make an M10 x 16 ISO bolt
//hex_nut(10);							// make an M10 ISO nut
//hex_bolt(8,16);						// make an M8 x 16 ISO bolt
//hex_nut(8);							// make an M8 ISO nut
//hex_bolt(6,12);						// make an M6 x 12 ISO bolt
//hex_nut(6);							// make an M6 ISO nut
//thread_out(8,16);					// make an M8 x 16 ISO thread
//thread_out_centre(14,16);				// make a centre for an M8 x 16 ISO thread
//thread_out_pitch(14,16,2.1);			// make an M8 x 16 thread with 1 mm pitch
//thread_out_centre_pitch(8,16,0.5);	// make the centre for an M8 x 16 thread with 1 mm pitch
//thread_in(14,10);						// make an M8 x 10 ISO thread
//thread_in_ring(14,10,3);				// make a ring to enclose an M8 x 10 ISO thread with thickness 2 mm
//thread_in_pitch(14,10,2.1);			// make an M8 x 10 thread with 1mm pitch

//--pitch-----------------------------------------------------------------------
// function for ISO coarse thread pitch (these are specified by ISO)
function get_coarse_pitch(dia) = lookup(dia, [
[1,0.25],[1.2,0.25],[1.4,0.3],[1.6,0.35],[1.8,0.35],[2,0.4],[2.5,0.45],[3,0.5],[3.5,0.6],[4,0.7],[5,0.8],[6,1],[7,1],[8,1.25],[10,1.5],[12,1.75],[14,2],[16,2],[18,2.5],[20,2.5],[22,2.5],[24,3],[27,3],[30,3.5],[33,3.5],[36,4],[39,4],[42,4.5],[45,4.5],[48,5],[52,5],[56,5.5],[60,5.5],[64,6],[78,5]]);

//--nut dims--------------------------------------------------------------------
// these are NOT specified by ISO
// support is provided for Rolson or Fairbury sizes, see WrenchSizes above

// function for Rolson hex nut diameter from thread size
function rolson_hex_nut_dia(dia) = lookup(dia, [
[3,6.4],[4,8.1],[5,9.2],[6,11.5],[8,16.0],[10,19.6],[12,22.1],[16,27.7],[20,34.6],[24,41.6],[30,53.1],[36,63.5]]);
// function for Rolson hex nut height from thread size
function rolson_hex_nut_hi(dia) = lookup(dia, [
[3,2.4],[4,3.2],[5,4],[6,3],[8,5],[10,5],[12,10],[16,13],[20,16],[24,19],[30,24],[36,29]]);

// function for Fairbury hex nut diameter from thread size
function fairbury_hex_nut_dia(dia) = lookup(dia, [
[3,6.0],[4,7.7],[5,8.8],[6,11.0],[8,14.4],[10,17.8],[12,20.0],[16,26.8],[20,33.0],[24,40.0],[30,50.9],[36,60.8]]);
// function for Fairbury hex nut height from thread size
function fairbury_hex_nut_hi(dia) = lookup(dia, [
[3,2.2],[4,3.0],[5,4.5],[6,5.0],[8,6.5],[10,8.1],[12,10.4],[16,14.2],[20,17],[24,20.3],[30,24.4],[36,29.5]]);

//--bolt dims-------------------------------------------------------------------
// these are NOT specified by ISO
// support is provided for Rolson or Fairbury sizes, see WrenchSizes above

// function for Rolson hex bolt head diameter from thread size
function rolson_hex_bolt_dia(dia) = lookup(dia, [
[3,6.4],[4,8.1],[5,9.2],[6,11.5],[8,14.0],[10,16],[12,22.1],[16,27.7],[20,34.6],[24,41.6],[30,53.1],[36,63.5]]);
// function for Rolson hex bolt head height from thread size
function rolson_hex_bolt_hi(dia) = lookup(dia, [
[3,2.4],[4,3.2],[5,4],[6,3.5],[8,4.5],[10,5],[12,10],[16,13],[20,16],[24,19],[30,24],[36,29]]);

// function for Fairbury hex bolt head diameter from thread size
function fairbury_hex_bolt_dia(dia) = lookup(dia, [
[3,6.4],[4,8.1],[5,8.8],[6,11.1],[8,14.4],[10,17.8],[12,20.1],[16,26.8],[20,33.0],[24,39.6],[30,50.9],[36,60.8]]);
// function for Fairbury hex bolt head height from thread size
function fairbury_hex_bolt_hi(dia) = lookup(dia, [
[3,2.4],[4,3.2],[5,3.4],[6,3.9],[8,5.1],[10,6.2],[12,7.3],[16,9.7],[20,12.2],[24,14.6],[30,17.9],[36,21.7]]);

//--top level modules-----------------------------------------------------------

module hex_bolt(dia,hi)
// make an ISO bolt
//  dia=diameter, 6=M6 etc.
//  hi=length of threaded part of bolt
{
	if (WrenchSizes==0)	rolson_hex_bolt(dia,hi);
	else					fairbury_hex_bolt(dia,hi);
}

module hex_nut(dia,hi)
// make an ISO nut
//  dia=diameter, 6=M6 etc.
{
	if (WrenchSizes==0)	rolson_hex_nut(dia);
	else					fairbury_hex_nut(dia);
}

module thread_out(dia,hi,thr=$fn)
// make an outside ISO thread (as used on a bolt)
//  dia=diameter, 6=M6 etc
//  hi=height, 10=make a 10mm long thread
//  thr=thread quality, 10=make a thread with 10 segments per turn
{
	p = get_coarse_pitch(dia);
	thread_out_pitch(dia,hi,p,thr);
}

module thread_in(dia,hi,thr=$fn)
// make an inside thread (as used on a nut)
//  dia = diameter, 6=M6 etc
//  hi = height, 10=make a 10mm long thread
//  thr = thread quality, 10=make a thread with 10 segments per turn
{
	p = get_coarse_pitch(dia);
	thread_in_pitch(dia,hi,p,thr);
}

module thread_out_pitch(dia,hi,p,thr=$fn)
// make an outside thread (as used on a bolt) with supplied pitch
//  dia=diameter, 6=M6 etc
//  hi=height, 10=make a 10mm long thread
//  p=pitch
//  thr=thread quality, 10=make a thread with 10 segments per turn
{
	h=(cos(30)*p)/8;
	Rmin=(dia/2)-(5*h);	// as wiki Dmin
	s=360/thr;				// length of segment in degrees
	t1=(hi-p)/p;			// number of full turns
	r=t1%1.0;				// length remaining (not full turn)
	t=t1-r;					// integer number of full turns
	n=r/(p/thr);			// number of segments for remainder
	// do full turns
	for(tn=[0:t-1])
		translate([0,0,tn*p])	th_out_turn(dia,p,thr);
	// do remainder
	for(sg=[0:n])
		th_out_pt(Rmin-0.1,p,s,sg+(t*thr),thr,h,p/thr);
		//FIX Made Rmin+0.1 >> Rmin -0.1
}

module thread_in_pitch(dia,hi,p,thr=$fn)
// make an inside thread (as used on a nut)
//  dia = diameter, 6=M6 etc
//  hi = height, 10=make a 10mm long thread
//  p=pitch
//  thr = thread quality, 10=make a thread with 10 segments per turn
{
	h=(cos(30)*p)/8;
	Rmin=(dia/2)-(5*h);	// as wiki Dmin
	s=360/thr;				// length of segment in degrees
	t1=(hi-p)/p;			// number of full turns
	r=t1%1.0;				// length remaining (not full turn)
	t=t1-r;					// integer number of turns
	n=r/(p/thr);			// number of segments for remainder
	for(tn=[0:t-1])
		translate([0,0,tn*p])	th_in_turn(dia,p,thr);
	for(sg=[0:n])
		th_in_pt(Rmin+0.1,p,s,sg+(t*thr),thr,h,p/thr);
}

module thread_out_centre(dia,hi)
{
	p = get_coarse_pitch(dia);
	thread_out_centre_pitch(dia,hi,p);
}

module thread_out_centre_pitch(dia,hi,p)
{
	h = (cos(30)*p)/8;
	Rmin = (dia/2) - (5*h);	// as wiki Dmin
	cylinder(r = Rmin, h = hi);
}

module thread_in_ring(dia,hi,thk)
{
	difference()
	{
		cylinder(r = (dia/2)+0.5+thk,h = hi);
		translate([0,0,-1]) cylinder(r = (dia/2)+0.1, h = hi+thk);
	}
}

//--low level modules-----------------------------------------------------------

module rolson_hex_bolt(dia,hi)
// make an ISO bolt with Rolson wrench sizes
//  dia=diameter, 6=M6 etc.
//  hi=length of threaded part of bolt
{
	hhi = rolson_hex_bolt_hi(dia);
	cylinder(r = rolson_hex_bolt_dia(dia)/2,h = hhi, $fn=6);
	translate([0,0,hhi-0.1])	thread_out(dia,hi+0.1);
	translate([0,0,hhi-0.1])	thread_out_centre(dia,hi+0.1);
}

module fairbury_hex_bolt(dia,hi)
// make an ISO bolt with Fairbury wrench sizes
//  dia=diameter, 6=M6 etc.
//  hi=length of threaded part of bolt
{
	hhi = fairbury_hex_bolt_hi(dia);
	cylinder(r = fairbury_hex_bolt_dia(dia)/2,h = hhi, $fn=6);
	translate([0,0,hhi-0.1])	thread_out(dia,hi+0.1);
	translate([0,0,hhi-0.1])	thread_out_centre(dia,hi+0.1);
}

module rolson_hex_nut(dia)
// make an ISO nut with Rolson wrench sizes
//  dia=diameter, 6=M6 etc.
{
	hi = rolson_hex_nut_hi(dia);
	difference()
	{
		cylinder(r = rolson_hex_nut_dia(dia)/2,h = hi, $fn=6);
		translate([0,0,-0.1])	cylinder(r = dia/2+0.1, h =hi + 0.2);
		//FIX Added 0.1 tolerance to cylinder r
	}
	translate([0,0,0.1])	thread_in(dia,hi-0.2);
}

module fairbury_hex_nut(dia)
// make an ISO nut with Fairbury wrench sizes
//  dia=diameter, 6=M6 etc.
{
	hi = fairbury_hex_nut_hi(dia);
	difference()
	{
		cylinder(r = fairbury_hex_nut_dia(dia)/2,h = hi, $fn=6);
		translate([0,0,-0.1])	cylinder(r = dia/2+0.1, h =hi + 0.2);
		//FIX Added 0.1 tolerance to cylinder r
	}
	translate([0,0,0.1])	thread_in(dia,hi-0.2);
}

module th_out_turn(dia,p,thr=$fn)
// make a single turn of an outside thread
//  dia=diameter, 6=M6 etc
//  p=pitch
//  thr=thread quality, 10=make a thread with 10 segments per turn
{
	h = (cos(30)*p)/8;
	Rmin = (dia/2) - (5*h);	// as wiki Dmin
	s = 360/thr;
	for(sg=[0:thr-1])
		th_out_pt(Rmin-0.1,p,s,sg,thr,h,p/thr);
		//FIX remove 0.1 tollerance from Rmin
}

module th_out_pt(rt,p,s,sg,thr,h,sh)
// make a part of an outside thread (single segment)
//  rt = radius of thread (nearest centre)
//  p = pitch
//  s = segment length (degrees)
//  sg = segment number
//  thr = segments in circumference
//  h = ISO h of thread / 8
//  sh = segment height (z)
{
	as = (sg % thr) * s;			// angle to start of seg
	//ae = as + s  + (s/100);		// angle to end of seg (with overlap)
	ae = as + s ;		// angle to end of seg (no overlap)
	z = sh*sg;
	//pp = p/2;
	//   1,4
	//   |\
	//   | \  2,5
 	//   | /
	//   |/
	//   0,3
	//  view from front (x & z) extruded in y by sg
	//
	//echo(str("as=",as,", ae=",ae," z=",z));
	polyhedron(
		points = [
			[cos(as)*rt,sin(as)*rt,z],								// 0
			[cos(as)*rt,sin(as)*rt,z+(3/4*p)],						// 1
			[cos(as)*(rt+(5*h)),sin(as)*(rt+(5*h)),z+(3/8*p)],		// 2
			[cos(ae)*rt,sin(ae)*rt,z+sh],							// 3
			[cos(ae)*rt,sin(ae)*rt,z+(3/4*p)+sh],					// 4
			[cos(ae)*(rt+(5*h)),sin(ae)*(rt+(5*h)),z+sh+(3/8*p)]],	// 5
		faces = [
			[0,1,2],			// near face
			[3,5,4],			// far face
			[0,3,4],[0,4,1],	// left face
			[0,5,3],[0,2,5],	// bottom face
			[1,4,5],[1,5,2]]);	// top face
}

module th_in_turn(dia,p,thr=$fn)
// make an single turn of an inside thread
//  dia = diameter, 6=M6 etc
//  p=pitch
//  thr = thread quality, 10=make a thread with 10 segments per turn
{
	h = (cos(30)*p)/8;
	Rmin = (dia/2) - (5*h);	// as wiki Dmin
	s = 360/thr;
	for(sg=[0:thr-1])
		th_in_pt(Rmin+0.1,p,s,sg,thr,h,p/thr);
}

module th_in_pt(rt,p,s,sg,thr,h,sh)
// make a part of an inside thread (single segment)
//  rt = radius of thread (nearest centre)
//  p = pitch
//  s = segment length (degrees)
//  sg = segment number
//  thr = segments in circumference
//  h = ISO h of thread / 8
//  sh = segment height (z)
{
	as = ((sg % thr) * s - 180);	// angle to start of seg
	//ae = as + s + (s/100);		// angle to end of seg (with overlap)
	ae = as + s;		// angle to end of seg (no overlap)
	z = sh*sg;
	pp = p/2;
	//         2,5
	//          /|
	//     1,4 / |
 	//         \ |
	//          \|
	//         0,3
	//  view from front (x & z) extruded in y by sg
	//
	polyhedron(
		points = [
			[cos(as)*(rt+(5*h)),sin(as)*(rt+(5*h)),z],				//0
			[cos(as)*rt,sin(as)*rt,z+(3/8*p)],						//1
			[cos(as)*(rt+(5*h)),sin(as)*(rt+(5*h)),z+(3/4*p)],		//2
			[cos(ae)*(rt+(5*h)),sin(ae)*(rt+(5*h)),z+sh],			//3
			[cos(ae)*rt,sin(ae)*rt,z+(3/8*p)+sh],					//4
			[cos(ae)*(rt+(5*h)),sin(ae)*(rt+(5*h)),z+(3/4*p)+sh]],	//5
		faces = [
			[0,1,2],			// near face
			[3,5,4],			// far face
			[0,3,4],[0,4,1],	// left face
			[0,5,3],[0,2,5],	// bottom face
			[1,4,5],[1,5,2]]);	// top face
}

```


[User]
Okay, so I've got this idea for a design challenge, "Make It Float," where I need to create a boat or floating object that can carry the most coins possible. I've been doing some research, and it looks like the key is using Archimedes' Principle to calculate how many coins the object can hold without sinking.

I found this existing OpenSCAD file (MakeItFloat.scad) that does a lot of the heavy lifting, but it's kind of clunky and I'd really like to have something better. It's got a lot of parameters to adjust, which is nice, but I want to make it more flexible and easier to use.

Here’s what I'm thinking for a new design:

**Core Functionality:**

1.  **Parametric Design:** I need a fully parametric OpenSCAD design that takes into account:
    *   **Print Area:** Allow for both rectangular and circular print beds, specifying dimensions for X, Y, and Z (or diameter and Z)
    *   **Shell Thickness:** Adjustable shell thickness for the floatation device.
    *   **Fluid Density:** Ability to change the fluid density (e.g. water, oil).
    *   **Filament Density:** Ability to adjust the filament density.
    *   **Coin Parameters:** Select from a range of standard Euro coins (1c, 2c, 5c, 10c, 20c, 50c, 1€, 2€) and also allow for custom coin dimensions (diameter, height, and weight), and of course calculate things like volume and density of the coin
    *   **Floatation Design:**
        *   Option to include or exclude coin stands (compartments).
        *   Option to include or exclude a cover.
        *   Adjustable gap settings - horizontal, vertical, and cover gaps.
        *   Adjustable cover height.
    *   **Hidden Parameters:** Set default `$fn`, plus internal variables for text size for display, and vertical and horizontal gaps.

2.  **Calculations:** The design needs to perform the following calculations behind the scenes:
    *   Calculate the volume and density of a single coin.
    *   Calculate the volume and weight of the floatation device.
    *   Calculate the filament volume and weight needed for coin stands/compartments (if any).
    *   Calculate the total number of coins the floatation device can carry using Archimedes' principle.
    *   Based on the number of coins that can be carried, determine if coin stands should be used, and how many.
    *   Calculate the optimal number of coin stands (if used) based on the print bed dimensions and coin stand diameter.
    *   Calculate the height of each coin stand.
    *   Calculate the volume and weight of the cover (if any).

3.  **OpenSCAD Output:**
    *   Based on the 'part' variable, allow the user to output just the floatation device, just the cover, or a section view showing the floatation device, coin stands, cover, and coins.
        *   If the section view is used, include text information on the number of coins and total weight.
    *   If coin stands are selected, show the coin stands inside the floatation device.
    *   If coins are selected, show the coin in each coin stand if the output is the section view
    *   Output a warning if parameters are set that would make the model unusable.

**Specific Requirements:**

*   The design should be optimized to hold the maximum number of coins. It should fill as much of the print area as possible.
*   It should be easily customizable to different coin types and print settings.
*   I want to make use of the `text()` function to display important info like the total number of coins carried and their total weight.

I do not expect you to use any external libraries.

[Assistant]
MakeItFloat.scad:
```
// Customizable MakeItFloat 1.0 by CD PUCK3D, July 2015
// is licensed under the Creative Commons - Attribution - Non Commercial license.
// please refer the complete license here: http://creativecommons.org/licenses/by-nc/3.0/legalcode

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

/*[General]*/
//Only to show
part=2;//[0:Float,1:Cover,2:Section (only to show)]
//Shell Thickness, in mm
Shell_Thickness=0.9;//[0.5:0.1:3]
//Fluid Density, in gr/cm3
Fluid_Density=1;
//Fialment Density, in gr/cm3
Filament_Density=1.24;

/*[Print Area]*/
//Set Plate Shape (N.B. Circular in under construction...)
Print_Bed=0;//[0:Rectangular,1:Circular]
//If rectangular set Print Area X, in mm
Print_Area_X=250;
//If rectangular set Print Area Y, in mm
Print_Area_Y=200;
//If circular set Print Diameter, in mm
Print_Diameter=200;
//Set Print Area Z, in mm
Print_Area_Z=150;

/*[Coin]*/
//choice a coin
Coin_Type="2€";//[1c:1 Cent Euro,2c:2 Cent Euro,5c:5 Cent Euro,10c:10 Cent Euro,20c:20 Cent Euro,50c:50 Cent Euro,1€:1 Euro,2€:2 Euro,"":Other]
//need for type=Other (eg: $1)
Coin_Value_Custom="";
//need for type=Other, in mm
Coin_Diameter_Custom=0;
//need for type=Other, in mm
Coin_Height_Custom=0;
//need for type=Other, in gr
Coin_Weight_Custom=0;

/*[Float]*/
//Coin Stand
Float_Stand=1;//[0:No,1:Yes]
//Float Cover
Float_Cover=1;//[0:No,1:Yes]

/*[Hidden]*/
$fn=150;
Gap_Vertical=0.1;//between coin and coin, in mm
Gap_Horizontal=0.5;//between coins and float, in mm
Cover_Gap=0.1;//inside joint cover, in mm
Cover_Height=10;//Cover Height, in mm
Text_Size=(Print_Area_X>Print_Area_Y?Print_Area_X>Print_Area_Z?Print_Area_X:Print_Area_Z:Print_Area_Y>Print_Area_Z?Print_Area_Y:Print_Area_Z)/10;// 1/10 of max dimension

// ====================================================================================================
// settaggio delle caratteristiche della singola moneta
 Coin_Value=Coin_Type!=""?Coin_Type:Coin_Value_Custom;
 Coin_Diameter=Coin_Type=="1c"?16.25:Coin_Type=="2c"?18.75:Coin_Type=="5c"?21.25:Coin_Type=="10c"?19.75:Coin_Type=="20c"?22.25:Coin_Type=="50c"?24.25:Coin_Type=="1€"?23.25: Coin_Type=="2€"?25.75:Coin_Diameter_Custom;
 Coin_Height=Coin_Type=="1c"?1.67:Coin_Type=="2c"?1.67:Coin_Type=="5c"?1.67:Coin_Type=="10c"?1.93:Coin_Type=="20c"?2.14:Coin_Type=="50c"?2.38:Coin_Type=="1€"?2.33:Coin_Type=="2€"?2.20:Coin_Height_Custom;
 Coin_Weight=Coin_Type=="1c"?2.30:Coin_Type=="2c"?3.06:Coin_Type=="5c"?3.92:Coin_Type=="10c"?4.10:Coin_Type=="20c"?5.74:Coin_Type=="50c"?7.80:Coin_Type=="1€"?7.50:Coin_Type=="2€"?8.50:Coin_Weight_Custom;
// calcolo del volume di 1 moneta = volume di un cilindro = PI*Raggio^2*altezza
 Coin_Pure_Volume=PI*pow((Coin_Diameter/2),2)*Coin_Height;
// calcolo della densità di 1 moneta = peso/volume
 Coin_Pure_Density=Coin_Weight/Coin_Pure_Volume;
// ====================================================================================================
// GALLEGGIANTE
// calcolo del filamento per il galleggiante = base+(volume_esterno-volume_interno)
 Filament_Float_Volume=Print_Bed==0?(Print_Area_X*Print_Area_Y*Shell_Thickness)+((Print_Area_X*Print_Area_Y*(Print_Area_Z-Shell_Thickness))-((Print_Area_X-Shell_Thickness*2)*(Print_Area_Y-Shell_Thickness*2)*(Print_Area_Z-Shell_Thickness))):(PI*pow(Print_Diameter/2,2)*Shell_Thickness)+((PI*pow(Print_Diameter/2,2)*(Print_Area_Z-Shell_Thickness))-(PI*pow(((Print_Diameter-Shell_Thickness*2)/2),2)*(Print_Area_Z-Shell_Thickness)));
// calcolo del peso del galleggiante = volume*densità (/1000 per cm3)
 Filament_Float_Weight=Filament_Float_Volume*(Filament_Density/1000);
// ====================================================================================================
// SCOMPARTI
// calcolo del volume di filamento per la sede di 1 moneta = volume_esterno-volume_interno
 Filament_Stand_Volume=PI*pow((Coin_Diameter+Gap_Horizontal*2+Shell_Thickness*2)/2,2)*(Coin_Height+Gap_Vertical)-PI*pow((Coin_Diameter+Gap_Horizontal*2)/2,2)*(Coin_Height+Gap_Vertical);
// calcolo del peso del filamento per la sede di 1 moneta = volume*densità (/1000 per cm3)
 Filament_Stand_Weight=Filament_Stand_Volume*(Filament_Density/1000);
// calcolo volume di 1 moneta con sede = volume cilindro
 Float_Stand_Volume=PI*pow((Coin_Diameter+Gap_Horizontal*2+Shell_Thickness*2)/2,2)*(Coin_Height+Gap_Vertical);
// calcolo densità di 1 moneta con sede = (peso_moneta+peso_filamento)/(volume_moneta+volume_filamento)
 Float_Stand_Density=(Coin_Weight+Filament_Stand_Weight)/(Coin_Pure_Volume+Filament_Stand_Volume);
// ====================================================================================================
// COPERCHIO
// calcolo del filamento per il coperchio = base+(volume_esterno-volume_interno)
 Filament_Cover_Volume=Print_Bed==0?(Print_Area_X*Print_Area_Y*Shell_Thickness)+(((Print_Area_X-Shell_Thickness*2-Cover_Gap*2)*(Print_Area_Y-Shell_Thickness*2-Cover_Gap*2)*(Cover_Height-Shell_Thickness))-((Print_Area_X-Shell_Thickness*4-Cover_Gap*4)*(Print_Area_Y-Shell_Thickness*4-Cover_Gap*4)*(Cover_Height-Shell_Thickness))):(PI*pow(Print_Diameter/2,2)*Shell_Thickness)+((PI*pow((Print_Diameter-Shell_Thickness*2-Cover_Gap*2)/2,2)*(Cover_Height-Shell_Thickness))-(PI*pow((Print_Diameter-Shell_Thickness*4-Cover_Gap*4)/2,2)*(Cover_Height-Shell_Thickness)));
// calcolo del peso del coperchio = volume*densità (/1000 per cm3)
 Filament_Cover_Weight=Filament_Cover_Volume*(Filament_Density/1000);
// ====================================================================================================
// QUANTE MONETE?
// VM = (PF-PP)/DM
// calcolo del volume di fluido = volume area di stampa
 Fluid_Volume=Print_Bed==0?Print_Area_X*Print_Area_Y*Print_Area_Z:PI*pow((Print_Diameter/2),2)*Print_Area_Y;
// calcolo del peso del fluido = volume*densità (/1000 per cm3)
 Fluid_Weight=Fluid_Volume*(Fluid_Density/1000);
// calcolo del volume di filamento = volume float + cover S/N
 Filament_Volume=Filament_Float_Volume+(Float_Cover==1?Filament_Cover_Volume:0);
// calcolo del peso del filamento = volume*densità (/1000 per cm3)
 Filament_Weight=Filament_Volume*(Fluid_Density/1000);
// settaggio del volume di 1 moneta = se con sede o meno
 Coin_Volume=Float_Stand==1?Float_Stand_Volume:Coin_Pure_Volume;
// settaggio della densità di 1 moneta = se con sede o meno
 Coin_Density=Float_Stand==1?Float_Stand_Density:Coin_Pure_Density;
// calcolo del volume di tutte le monete = (peso del fluido - peso del filamento ) / densità moneta
 Coins_Volume=(Fluid_Weight-Filament_Weight)/Coin_Density;
// calcolo del numero di monete = volume totale / volume di 1 moneta
 Coins_Quantity=floor(Coins_Volume/Coin_Volume);
// ====================================================================================================
// QUANTE SEDI?
// calcolo dell'altezza di tutte le monete = quantità monete * (altezza moneta + gap_V)
 Coins_Height=Coins_Quantity*(Coin_Height+Gap_Vertical);
// calcolo di quante sedi servono = altezza monete / altezza Z
 Stand_Quantity = ceil(Coins_Height/Print_Area_Z);
// calcolo del diametro di una sede = diamietro moneta + (gap_H * 2) + (spessore stampa * 2)
 Stand_Diameter=Coin_Diameter+Gap_Horizontal*2+Shell_Thickness*2;

// finire CERCHIO?!?
// calcolo max sedi X = X / diametro di una sede
 Stand_Max_X = floor(Print_Area_X/Stand_Diameter);
// calcolo max sedi Y = Y / diametro di una sede
 Stand_Max_Y = floor(Print_Area_Y/Stand_Diameter);

// calcolo quante monete per ogni sede = totale monete / numero di stand totale
 Stand_Coins=floor(Coins_Quantity/(Stand_Max_X*Stand_Max_Y))+1; // ottimizzare +1 !!!
// calcolo dell'altezza di ogni sede = monete per 1 sede * (altezza di una moneta + gap_V)
Stand_Height=Stand_Coins*(Coin_Height+Gap_Vertical);
// ====================================================================================================

print_part();
module print_part(){
 if(Print_Bed==0&&Print_Area_X<50){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Print Area X not < 50",size=Text_Size,halign="center",valign="center");
 }else if(Print_Bed==0&&Print_Area_Y<50){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Print Area Y not < 50",size=Text_Size,halign="center",valign="center");
 }else if(Print_Bed==1&&Print_Diameter<50){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Print Diameter not < 50",size=Text_Size,halign="center",valign="center");
 }else if(Print_Area_Z<50){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Print Area Z not < 50",size=Text_Size,halign="center",valign="center");
 }else if(Coin_Type==""&&Coin_Value==""){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Insert Coin Value",size=Text_Size,halign="center",valign="center");
 }else if(Coin_Type==""&&Coin_Diameter==0){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Insert Coin Diameter",size=Text_Size,halign="center",valign="center");
 }else if(Coin_Type==""&&Coin_Height==0){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Insert Coin Height",size=Text_Size,halign="center",valign="center");
 }else if(Coin_Type==""&&Coin_Weight==0){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Insert Coin Weight",size=Text_Size,halign="center",valign="center");
	}else if(Print_Bed==1&&Float_Stand==1){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Stand with Circular is under construction",size=Text_Size,halign="center",valign="center");
	}else if(Coins_Quantity<1){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Check your input",size=Text_Size,halign="center",valign="center");
 }else{
  if(part==0){
		 Mod_Float();
	 }else if(part==1){
		 Mod_Cover();
	 }else if(part==2){
	 	Mod_Section();
 	}
	}
}
module Mod_Float(){
	if(Print_Bed==0){
  difference(){
   Xe=Print_Area_X;
   Ye=Print_Area_Y;
   Ze=Print_Area_Z;
   translate([-Xe/2,-Ye/2,0])cube([Xe,Ye,Ze]);
   Xi=Print_Area_X-Shell_Thickness*2;
   Yi=Print_Area_Y-Shell_Thickness*2;
   Zi=Print_Area_Z;
   translate([-Xi/2,-Yi/2,Shell_Thickness])cube([Xi,Yi,Zi]);
  }
 }else{
  difference(){
   De=Print_Diameter;
   Ze=Print_Area_Z;
   translate([0,0,0])cylinder(d=De,h=Ze);
   Di=Print_Diameter-Shell_Thickness*2;
   Zi=Print_Area_Z;
   translate([0,0,Shell_Thickness])cylinder(d=Di,h=Zi);
  }
 }
	if(Float_Stand==1){
  Xs=-((Stand_Max_X/2)*(Stand_Diameter-Shell_Thickness))+((Stand_Diameter-Shell_Thickness)/2);
  Ys=-((Stand_Max_Y/2)*(Stand_Diameter-Shell_Thickness))+((Stand_Diameter-Shell_Thickness)/2);
  for (X=[0:Stand_Max_X-1]){
   for (Y=[0:Stand_Max_Y-1]){
    difference(){
     translate([Xs+(X*(Stand_Diameter-Shell_Thickness)),Ys+(Y*(Stand_Diameter-Shell_Thickness)),0])cylinder(d=Stand_Diameter,h=Stand_Height+Shell_Thickness);
     translate([Xs+(X*(Stand_Diameter-Shell_Thickness)),Ys+(Y*(Stand_Diameter-Shell_Thickness)),Shell_Thickness])cylinder(d=Stand_Diameter-(Shell_Thickness*2),h=Stand_Height+Shell_Thickness);
    }
   }
  }
 }
}
module Mod_Cover(){
	if(Float_Cover==0){
  color("red")translate([0,0,0])linear_extrude(height=0.1)text("Cover unselected",size=Text_Size,halign="center",valign="center");
 }else{
  if(Print_Bed==0){
   difference(){
    Xa=Print_Area_X;
    Ya=Print_Area_Y;
    Za=Shell_Thickness;
    translate([-Xa/2,-Ya/2,0])cube([Xa,Ya,Za]);
    Xb=Print_Area_X-(Shell_Thickness*4);
    Yb=Print_Area_Y-(Shell_Thickness*4);
    Zb=Shell_Thickness;
    translate([-Xb/2,-Yb/2,-0.01])cube([Xb,Yb,Zb+0.02]);
   }
   difference(){
    Xe=Print_Area_X-(Shell_Thickness*2)-(Cover_Gap*2);
    Ye=Print_Area_Y-(Shell_Thickness*2)-(Cover_Gap*2);
    Ze=Cover_Height+Shell_Thickness;
    translate([-Xe/2,-Ye/2,0])cube([Xe,Ye,Ze]);
    Xi=Print_Area_X-(Shell_Thickness*4)-(Cover_Gap*2);
    Yi=Print_Area_Y-(Shell_Thickness*4)-(Cover_Gap*2);
    Zi=Cover_Height+Shell_Thickness;
    translate([-Xi/2,-Yi/2,Shell_Thickness])cube([Xi,Yi,Zi]);
   }
  }else{
   difference(){
    Da=Print_Diameter;
    Za=Shell_Thickness;
    translate([0,0,0])cylinder(d=Da,h=Za);
    Db=Print_Diameter-(Shell_Thickness*4);
    Zb=Shell_Thickness;
    translate([0,0,-0.01])cylinder(d=Db,h=Zb+0.02);
   }
   difference(){
    De=Print_Diameter-(Shell_Thickness*2)-(Cover_Gap*2);
    Ze=Cover_Height+Shell_Thickness;
    translate([0,0,0])cylinder(d=De,h=Ze);
    Di=Print_Diameter-(Shell_Thickness*4)-(Cover_Gap*2);
    Zi=Cover_Height+Shell_Thickness;
    translate([0,0,Shell_Thickness])cylinder(d=Di,h=Zi);
   }
  }
 }
}
module Mod_Section(){
 difference(){
  union(){
  	if(Print_Bed==0){
    %Mod_Coin();
   }
   translate([0,0,0])rotate([0,0,0])Mod_Float();
  	if(Float_Cover==1){
    translate([0,0,Print_Area_Z+Shell_Thickness+Cover_Gap+30])rotate([180,0,0])Mod_Cover();
   }
  }
  translate([0,-Print_Area_Y,-Print_Area_Z/2])cube([Print_Area_X,Print_Area_Y,Print_Area_Z*2+30]);
 }
 color("red")translate([0,-Print_Area_Y/2-Text_Size*1,0])linear_extrude(height=0.1)text("Section (only to show)",size=Text_Size,halign="center",valign="center");
 color("red")translate([-10,-Print_Area_Y/2-Text_Size*3,0])linear_extrude(height=0.1)text(str(Coins_Quantity," x ",Coin_Value," = ",Coins_Quantity*Coin_Weight," gr"),size=Text_Size,halign="center",valign="center");
}
module Mod_Coin(){
 Xs=-((Stand_Max_X/2)*(Stand_Diameter-Shell_Thickness))+((Stand_Diameter-Shell_Thickness)/2);
 Ys=-((Stand_Max_Y/2)*(Stand_Diameter-Shell_Thickness))+((Stand_Diameter-Shell_Thickness)/2);
 for (X=[0:Stand_Max_X-1]){
  for (Y=[0:Stand_Max_Y-1]){
   for (i=[0:Stand_Coins-1]){
    translate([Xs+(X*(Stand_Diameter-Shell_Thickness)),Ys+(Y*(Stand_Diameter-Shell_Thickness)),Shell_Thickness+(i*(Coin_Height+Gap_Vertical))])cylinder(d=Coin_Diameter,h=Coin_Height);
   }
   color("black")translate([Xs+(X*(Stand_Diameter-Shell_Thickness)),Ys+(Y*(Stand_Diameter-Shell_Thickness)),Stand_Coins*(Coin_Height+Gap_Vertical)+Shell_Thickness])linear_extrude(height=0.1)text(Coin_Value,size=Coin_Diameter/3,halign="center",valign="center");
  }
 }
}
```


[User]
Hey, I'm looking to design a parametric solar charge box, similar to the one described in the provided text and SCAD file "solar_charge_boxv1.scad". I want to be able to customize it for different battery sizes and component placements. Here's what I'm thinking:

First, I need a main case body with adjustable dimensions for width, length, and height (interior and exterior). I'd like to be able to specify the wall thickness for the case. The top should be a separate, removable piece, also with adjustable thickness. I'd like to ensure this top piece properly fits the box with a suitable tolerance.

Next, I need to mount several components inside the box. I need to be able to define the position and dimensions of these components:
*   **A 12V DC socket**: Allow for customizable offset from the edge of the case, both in X and Y, as well as the diameter and depth of the socket. Include mounting holes for the socket.
*   **A fuse holder**: Allow for adjustable X and Y offset, length, width, and mounting screw positions.
*  **A round rocker switch:** Similar to the fuse holder, let me control X and Y offset, diameter, and height, and also include mounting features.
*   **A large square switch:** Again, adjustable X and Y, and also the overall size of the switch body and switch itself.
*   **A PV switch:** Adjustable X and Y offset, width, length and height.
*  **A USB charging module enclosure:** This one is more complex; I want a parametric case that can house two PCB boards stacked vertically. This should allow for the length, width, and thickness of each PCB board to be defined, along with the spacing between them. I'll also need to define a screw hole for mounting, and the USB port cutouts. The cover of the case should have screw mounting points.

I will need to export the parts separately. I'm thinking something similar to the existing file, with an output variable that lets me specify which part to render, like:

*   `OUTPUT = 0;` for the main case body
*   `OUTPUT = 1;` for the top plate
*  `OUTPUT = 2;` for both (maybe for viewing?)
*   `OUTPUT = 4;` for the usb case
*   `OUTPUT = 5;` for the usb cover
*  `OUTPUT = 6;` for the assembled usb case

It would also be helpful to define some other parameters, such as the radius of screw holes, so it could easily be changed.

I’d like the code to use the `hull()` function where appropriate to create solid objects, and `difference()` where necessary to create cutouts for components.

Finally, I'd love to add text labels to the top plate. I would like to specify the text, position, and rotation of these labels, so text can be adjusted if a label is needed.

I know this is a lot, but I'd really appreciate the help! I think the library from `write.scad` is needed to draw the text. I believe that the design does not use any other libraries. Thanks!

[Assistant]
solar_charge_boxv1.scad:
```
/**************************************************/
/* Solar Charg Box - ver 1.0                      */
/* by Chris Payne July,2015                       */
/*                                                */
/* Creative commons share alike license           */
/* All parts of this project are not to be resold */
/*                                                */
/* This project is a low power storage box to be  */
/* combined with a low power solar panel (eg: 25W)*/
/* and will charge USB devices and 12V devices    */
/* and also run a 12V DC-AC inverter.             */
/* This project can store enough power to cause   */
/* harm, so please follow the wiring diagram and  */
/* practice caution, and install all rocker switches*/
/* as suggested in the instructions.              */
/**************************************************/

// Alter variable OUTPUT to select which part of the project to export for printing.
// Review the PDF files included with this project to locate parts, and wiring info.
// The MAIN battery switch ONLY disconnects power from all output devices.
// The MAIN battery switch should be in the OFF position when power is not required.
// The PV (panel) switch disconnects the panel and charge controller from the battery.
// The PV (Panel) switch should be in the OFF position when not charging the battery.
// The PV panel will charge the battery when the PV switch is in the ON position.
// The MAIN battery switch WILL NOT prevent PV panel from charging the battery. These are
// two separate curcuits.
// The MAIN battery and PV switches should be in the OFF position when battery is not in use.
// PV switch MUST be in the OFF position before disconnecting or connecting a PV panel.
// The maximum draw from the battery is limited to 10A in the original wiring diagram.

//use<write.scad>         // include write.scad to add TEXT to the object
case_wid = 127;          // overall case width
case_len = 127;          // overall case length
12vXoffset = 32.5;       // universal X offset position for 12v parts and 12v mount ( def: 32.5 )
 pcbwid = 37;            // pcb boards width in usb case
 pcblen = 45.15;         // pcb boards length in usb case
 pcbthick = 1.4;         // pcb boards thickness in usb case
 pcbspacing = 12;        // spacing between pcb boards in USB case
screw_hole = 1.8 /2;     // screw hole diam usb parts
12vscrew_rad = 5 / 2;    // 12volt mount hole diam

OUTPUT = 0;
              // 0 = main case body   (print ready)
              // 1 = top plate        (view only)
              // 2 = top plate + body (view only)
              // 3 = all parts        (view only)
              // 4 = usb case         (view only)
              // 5 = usb case cover   (print ready)
              // 6 = usb case         (print ready)

if (OUTPUT == 0) {
  translate([0, 0, 88]) rotate([0, 180, 0]) partlayout(0);       // print ready assembled object
}

if (OUTPUT == 1) {
case_top(3, 1); // create case top plate
} // end if 1

if (OUTPUT == 2) {
    translate([0, 0, 90-3]) case_top(1, 1);  // top plate

   translate([0, 0, 0]) case_top(90-3, 0);  // case walls
  }  // end if 2

if (OUTPUT == 3) {
   translate([32 + 100, 0, 0]) 12volt();
   translate([80, 100, 0]) fuse();
   translate([80, 60, 0]) rswitch();
   translate([60, -70, 0]) bigswitch();
   translate([0, 0, 0]) pv_switch();

   translate([0 + 100, 0, 0]) 12vbracket() ;
}  // end if 3

if ( OUTPUT == 4) {
       usb_port_holes();                                    // usb port holes

       difference() {
         translate([0, 0, 0]) rotate([0, 0, 0]) usb(1);        // usb holder case
         translate([0, 0, 0]) rotate([0, 0, 0]) usb_cover(0);  // usb cover
      } // end diff
}  // end if 4

if (OUTPUT == 5) {
  translate([0, 0, 50]) rotate([0, 90, 0]) usb_cover();       // print ready assembled object
}

if ( OUTPUT == 6) {
      difference() {
         translate([0, 0, 0]) rotate([0, 270, 0]) usb(0);        // usb holder case
         translate([0, 0, 0]) rotate([0, 270, 0]) usb_cover(0);  // usb cover
      }
}  // end if 6

//////////////////////////////////////////
// assembled part - READY to print      //
//////////////////////////////////////////
module partlayout(toponly) {
 12vX = 6;
 12vY = 32;

difference() {
// primary body
union() {
   translate([0, 0, 90-4]) case_top(2.5, 1);  // top plate
   if ( toponly == 0) {    // print sides with top plate, if toponly == 0
       translate([0, 0, 0]) case_top(90-4, 0);  // case walls
   }

   translate([12vX, 12vY, 41.5]) 12vbracket() ; // 12V bracket
  } // end union

// Individual parts to subtract from body
union() {
// add holes for the parts
//   translate([96, 88, 87.25]) cube([12, 1, 1]); // line beside switch
   translate([90, 93, 72]) bigswitch();  // batt main
   translate([105, 75, 63]) fuse();      // batt main fuse

   translate([105, 40, 63]) fuse();      // PV fuse
   translate([96, 12, 90-12]) pv_switch();   // PV switch

   translate([70, 32, 71.5]) rswitch();  // 12V port switch
   translate([12vX + 12vXoffset, 12vY, 40]) 12volt(); // 12v port

   translate([65, 88, 71.25]) rswitch();                         // usb switch
   translate([20, 70, 86.25]) rotate([0, 90, 0]) usb();          // usb holder case
   translate([20, 70, 90]) rotate([0, 90, 0])  usb_port_holes(); // usb port holes
   translate([20, 70, 87.25]) rotate([0, 90, 0]) usb_cover(1);   // usb cover ?????
   translate([20, 70, 90.25]) rotate([0, 90, 0]) screw_holes(2.5);   // usb case screw holes in top plate

// demarkation lines around corresponding parts
  translate([85, 63, 87.5]) lborder(40, 61, 2);   // border around main power connect
  translate([87, 6, 87.5]) lborder(36, 46, 2);   // border around PV fuse
  translate([18, 12, 87.5]) lborder(66, 40, 2);   // border around 12v connect
  translate([18, 65, 87.5]) lborder(62, 46, 2);   // border around usb connect

  translate([-3, 32, 73.5]) 12vscrewholes();  // screw holes in case for 12v device
  translate([110, 0, 2])  cube([12, 136, 6]);  // wire holes for solar charger

} // end union

 } // end diff
} // end module

///////////////////
// pcb boards
///////////////////
module pcb_boards() {
// pcb board 1
 translate([0, 0, pcbthick + pcbspacing ]) color("BLUE") cube([pcblen, pcbwid, pcbthick]);
 // pcb board 2
 translate([0, 0, 2]) color("GREEN") cube([pcblen, pcbwid, pcbthick]);

}

///////////////////////
// USB Case
///////////////////////
module usb(draw_boards) {

 // if draw_boards =1, then draw PCB boards in the model
 if (draw_boards == 1) {
 pcb_boards();
 }

 difference() {
 union() {
// Building the outer case
  hull() {   // upper case corner
      translate([0, -4, 22]) color("BLUE") cube([pcblen + 4, 2, 2]);  // upper  0,0
      translate([0, pcbwid +2, 22]) color("BLUE") cube([pcblen +4, 2, 2]);  // upper 0,+y
 }
  // lower case corner
  hull() {
      translate([0, -4, -4]) color("BLUE") cube([pcblen +4, 2, 2]);  // bottom 0,0
      translate([0, pcbwid +2, -4]) color("BLUE") cube([pcblen +4, 2, 2]);  // bottom 0,+y
  }
  hull() { // case corner
      translate([0, pcbwid +2, 20]) color("BLUE") cube([pcblen +4, 2, 2]);  // upper 0,+y
      translate([0, pcbwid +2, -4]) color("BLUE") cube([pcblen +4, 2, 2]);  // bottom 0,+y
  }
hull() {  // case corner
      translate([0, -4, 20]) color("BLUE") cube([pcblen +4, 2, 2]);  // upper 0,0
      translate([0, -4, -4]) color("BLUE") cube([pcblen +4, 2, 2]);  // bottom 0,0
}

// create PCB slots
  // draw bulk of rails to have the pcb slots cut out of
  translate([2, -2, -2]) color("Magenta") cube([25, 3, 24]); // 0,0 side
  translate([2, pcbwid-1, -2]) color("Magenta") cube([25, 3, 24]); // +y side

// screw tabs
 translate([0, 0, 24]) color("BLUE") cube([3, pcbwid, 8]);  // top screw tab
 translate([0, 0, -11]) color("BLUE") cube([3, pcbwid, 8]);  // bottom screw tab

// USB cover screw tabs
hull() {
translate([44, pcbwid+4, 3.5])  color("GREEN") cube([3, 4, 13]); // right side
translate([42, pcbwid+3, 7])  color("GREEN") cube([1, 1, 6]); // right side
} // end hull

hull() {
 translate([44, -8, 3.5])  color("GREEN") cube([3, 4, 13]); // left side
translate([42, -4, 7])  color("GREEN") cube([1, 1, 6]); // left side
} // end hull

} // end union

// screw holes in cover
translate([-6, 0, 0]) screws_in_tabs();

// screw holes in screw tabs
screw_holes(2.12);

// pcb board 1
 translate([0, 0, pcbthick + pcbspacing ]) color("BLUE") cube([pcblen, pcbwid, pcbthick]);
 // pcb board 2
 translate([0, 0, 2]) color("GREEN") cube([pcblen, pcbwid, pcbthick]);

} // end diff

}  // end module

//////////////////////////////////
// USB COVER for curcuit boards
//////////////////////////////////
module usb_cover(cutout) {
len = 41;
wid = 22.5;
thick = 3;

 if (cutout == 1)
 { // generate parts to use in DIFF
 translate([47, pcbwid+1, 3.5])  color("ORANGE", 0.5) cube([thick, 4, 13]); // right side
 translate([47, -5, 3.5])  color("ORANGE", 0.5) cube([thick, 4, 13]); // left side
 }
 else
 { // generate parts to print
difference() {
union() {
 translate([47, -2, -1]) color("LIGHTGREEN", 0.5) cube([thick, len-1, wid]);   // cover
 translate([47, -8, 4 -1])  color("LIGHTGREEN", 0.5) cube([thick, len + 11, 12+2]);   // cover tabs
 } // end union

// screw holes in cover
screws_in_tabs();

 translate([47, 6, 1])  color("BLUE", 0.5) cube([thick+2, 25, 17]);   // cover cutout for fuse

  } // end diff
} //end else

} // end module

/////////////////////////////////
// screw holes in USB case cover tabs
/////////////////////////////////
module screws_in_tabs() {
    // screw holes in cover
 translate([45+2, -5, 10]) rotate([0,90,0]) color("LIGHTGREEN") cylinder(h=10, r=screw_hole) cylinder() ;  // screw hole in covers
 translate([45+2, pcbwid + 5, 10]) rotate([0,90,0]) color("LIGHTGREEN") cylinder(h=10, r=screw_hole) cylinder() ;  // screw hole in covers

} // end module

/////////////////////////////////
// USB screw holes in - case tabs
/////////////////////////////////
module screw_holes(size_d) {
  translate([-1, 6, -7]) rotate([0,90,0]) color("LIGHTGREEN") cylinder(h=16, r=size_d /2) cylinder() ;
  translate([-1, 6, 28]) rotate([0,90,0]) color("LIGHTGREEN") cylinder(h=16, r=size_d /2) cylinder() ;
  translate([-1, 30, 28]) rotate([0,90,0]) color("LIGHTGREEN") cylinder(h=16, r=size_d /2) cylinder() ;
  translate([-1, 30, -7]) rotate([0,90,0]) color("LIGHTGREEN") cylinder(h=16, r=size_d /2) cylinder() ;

}
// end module

////////////////////////////////////////
// USB ports - cutout for face plate
////////////////////////////////////////
module usb_port_holes() {
    pwid = 7.5;             // ( def: 7 )
    plen = 14;            // ( def: 13.1 )
    phi =  13.2;            // ( def: 12 )
    xpos = 0;

  translate([xpos, 2, pcbthick +2])  color("SILVER") cube([phi, plen, pwid]);   // usb port- bottom row
  translate([xpos, plen + 2 + 5, pcbthick +2])  color("SILVER") cube([phi, plen, pwid]);   // usb port bottom row
  translate([xpos, 2, pcbthick + pcbspacing +1.5])  color("SILVER") cube([phi, plen, pwid]);   // usb port hole
  translate([xpos, plen + 2 + 5, pcbthick + pcbspacing + 1.5])  color("SILVER") cube([phi, plen, pwid]);   // usb port hole

  translate([-4, 18.5, 12]) rotate([0,90,0]) color("LIGHTGREEN") cylinder(h=10, r=4 /2) ;  // LED hole

}
// end module

////////////////////////////////
// square battery main switch
////////////////////////////////
module bigswitch() {
  swllen = 29.25;
  swwid = 26.5;
  sw_z =  18.5;
  swtoplen = 31.5;
  swtopwid = 29.4 ;

   color("BLUE") cube([swllen, swwid, sw_z]) ;  // sw cube

   translate([-(swtoplen - swllen) /2, -(swtopwid - swwid) /2, sw_z -2]) color("BLUE") cube([swtoplen, swtopwid, 2]) ;  // sw top lip

   translate([2, 2, sw_z]) rotate([0, 8, 0]) color("RED") cube([swllen - 4, swwid -4, 4]) ;  // sw red switch

} // end module

////////////////////////
// switch - round
////////////////////////
module rswitch() {
cyl_dia = 20.7 / 2;
union() {
 color("BLUE") cylinder(h=17.25, r=cyl_dia, $fn=30); // switch body

 translate([0, 0, 17]) color("BLUE") cylinder(h=2, r1=cyl_dia,r1=22.85 /2, $fn=30); // switch body

 translate([0, 0, 17]) rotate([0, 5, 0]) color("RED") cylinder(h=1.5, r=cyl_dia - 2, $fn=30); // switch button

  translate([-1, -(23 / 2 ) , 5]) color("LIGHTBLUE") cube([2.5, 23, 12]); // key way

  } // end union

}  // end module

/////////////////////
// fuse breaker
/////////////////////
module fuse() {
 fuse_d = 10.85 /2;
 fuselen = 14;
 fusewid = 29.5;
 fusez = 23;

 union() {
 translate([0, 0, fusez]) color("RED") cylinder(h=9.81, r= fuse_d); // reset threads

 translate([0, 0, fusez]) color("BLACK") cylinder(h=10.5, r= fuse_d-0.5); // reset button

    translate([0, 0, fusez]) color("ORANGE") cylinder(h=2.4, r=13 /2); // reset shoulder

 translate([-fusewid / 2, -fuselen /2, 0]) color("BLUE") cube([fusewid, fuselen, fusez ]);
 } // end union
} // end module

/////////////////////////////////
// 12volt power port device
/////////////////////////////////
module 12volt() {
 12v_d = 29.5 / 2;      // (def:  27.7 /2 )
 screw_rad = 5 / 2;

   union() {
    color("SILVER") cylinder(h=57.75, r=12v_d, $fn=20);  // 12v body
    translate([-(12.7 + 10.5), -27.7 / 2, 57.75-(25.2 + 12)]) color("RED") cube([10.5 + 10, 27.27, 25.2]);  // block on cylinder

 difference() {
    translate([-(12.7 + 10.5 + 3.4), - 52.4 / 2, 57.75-(25.2 + 12)]) color("RED") cube([3.4, 52.4, 25.2]);  // 12v mount plate
  union() {
    translate([- 27 ,-(38/2), 57.75 - 24]) rotate([0, 90, 0]) color("BLUE") cylinder(h=10, r=screw_rad); // -y screw hole

    translate([- 27 ,(38/2), 57.75 - 24]) rotate([0, 90, 0]) color("BLUE") cylinder(h=10, r=screw_rad); // -y screw hole
   } // end union of screws
  } // end difference

   } // end union

} // end module

////////////////////////
// 12volt bracket
////////////////////////
module 12vbracket() {

  difference() {
   union() {
    translate([-2, - 52.4 / 2, 57.75-(25.2 + 12)]) color("LIGHTGREEN") cube([8, 52.4, 25.2]) ;// 12v bracket plate

    } // end union

  union() {
    translate([-2, 0, 32]) 12vscrewholes();
   } // end union
  } // end difference

} // end module

//////////////////////
// screw holes function for 12v device and case holes
//////////////////////
module 12vscrewholes() {
    translate([0, -(38/2), 0]) rotate([0, 90, 0]) color("BLUE") cylinder(h=9, r=12vscrew_rad); // -y screw hole

    translate([0, (38/2), 0])  rotate([0, 90, 0]) color("BLUE") cylinder(h=9, r=12vscrew_rad); // y++ screw hole
}

//////////////////////////////
// entire case top plate
//////////////////////////////

// if solid = 1, then draw a solid plate with parts holes
// if solid = 0, then draw perimeter only
// cyl_h = thickness of top plate
module case_top(cyl_h, solid) {
    diam=5;
    if (solid == 1) {
 union() {
   hull() {
    translate([diam /2, diam /2, 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // 0, 0, 0
    translate([case_len - (diam /2), diam /2, 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // +, 0, 0
    translate([case_len - (diam /2), case_wid - (diam /2), 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // +, +, 0
    translate([diam /2, case_wid - (diam /2), 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // 0, +, 0
    } // end hull
} // end union
} // end if solid == 1

else
{

 union() {
    hull() {
    translate([diam /2, diam /2, 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // 0, 0, 0
    translate([case_len - (diam /2), diam /2, 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // +, 0, 0
    } // end hull

    hull() {
    translate([case_len - (diam /2), diam /2, 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // +, 0, 0

    translate([case_len - (diam /2), case_wid - (diam /2), 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // +, +, 0
} // end hull

hull() {
    translate([case_len - (diam /2), case_wid - (diam /2), 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // +, +, 0

    translate([diam /2, case_wid - (diam /2), 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // 0, +, 0
} // end hull

hull() {
    translate([diam /2, case_wid - (diam /2), 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // 0, +, 0

   translate([diam /2, diam /2, 0]) cylinder(h=cyl_h, r=diam/2, $fn=20);    // 0, 0, 0
  } // end hull
  } // end union
}  // end else

}  // end module

/////////////////////////
// add text if needed
/////////////////////////
module addtext() {

translate([15, 40, 87.25]) rotate([0, 0, -90]) write("12 VOLT", Letters.dxf);
translate([8, 35, 87.25]) rotate([0, 0, -90]) write("OUT", Letters.dxf);
translate([10, 93, 87.25]) rotate([0, 0, -90]) write("USB", Letters.dxf);

translate([90, 55, 87.25]) rotate([0, 0, -90]) write("10 A", Letters.dxf);
translate([115, 60, 87.25]) rotate([0, 0, -90]) write("PV Panel", Letters.dxf);

translate([90, 80, 87.25]) rotate([0, 0, -90]) write("10 A", Letters.dxf);
translate([115, 80, 87.25]) rotate([0, 0, -90]) write("Batt", Letters.dxf);

translate([80, 111, 87.25]) rotate([0, 0, -90]) write("Batt", Letters.dxf);

translate([110, 90, 87.25]) rotate([0, 0, -90]) write("1", Letters.dxf);
translate([90, 90, 87.25]) rotate([0, 0, -90]) write("0", Letters.dxf);

}

/////////////////////////////////
// create outline around parts
/////////////////////////////////
module lborder(xx, yy, ythick) {

difference() {
 cube([xx, yy, ythick]);
 translate([2, 2, -1]) cube([xx-4, yy-4, ythick+2]);
 }

}// end module

///////////////////////////
// PV switch - rectangle
///////////////////////////
module pv_switch() {
pvswlen = 19.75;
pvswwid = 13.5;
pvz = 10;

 cube([pvswlen, pvswwid, pvz]);   // switch body
 translate([-0.75, -0.75,pvz]) cube([pvswlen+1.5, pvswwid+1.5, 1]);    // switch top cap
 translate([1.25, 1.25,pvz]) color("GREEN") rotate([0, 4, 0]) cube([pvswlen -3, pvswwid -3, 4]);    // switch top cap

}

```


[User]
Alright, I've got a project I'm hoping you can help me with. I'm looking to create a parametric design for a sauce packet holder, like the kind you get at fast food places. I want it to be customizable so I can fit different sized packets, and I need it to have an optional lid and the ability to connect multiple units together.

Here's a breakdown of what I need:

**Core Holder:**

*   **Parametric Dimensions:** I'll need to be able to define the width, length, and height of the holder's interior, corresponding to the size of the packet, with an added wall thickness.
*   **Wall Thickness:** A parameter to define the thickness of the walls.
*   **Front Cutout:** A cutout on the front side to make it easier to grab the packet. I'd like this to be a semi-circular cutout, with parameters for the radius of the circle and how far to offset it from the front.
*   **Text Labels:** I need the ability to add text labels to the front of the holder. These labels should have parameters for the text, font size, font depth, and the vertical position of the labels (top and middle, for example).
*   **Ramp:** An optional ramp on the back of the container. I need to be able to define it's length as a percent of packet length, and its height.

**Lid:**

*   **Depth:** A parameter to define the lid's depth.
*   **Covers Connector:** An option to have the lid cover the connector or not.
*   **Text Labels:** I need the ability to add text labels to the lid, with options for the main label, as well as a text label running lengthwise along the lid's side, and the position of the labels.
*   **Lengthwise Label Rotation:** Parameter to indicate whether to rotate the Lengthwise text left or right.

**Connectors:**

*   **Connectable Options:** The ability to define if the unit can be connected to another on the left, the right, both, or not at all.
*   **Locking Mechanism:** I was thinking of using a trapezoid lock and slot, like a dovetail connection. This mechanism should have parameters for its depth, and width.

**General:**

*   **Units:**  All dimensions will be in millimeters (mm).
*   **Parametric:** Everything should be parametric and controllable.
*   **Modularity:** The parts should be modular, so I can turn off the lid and/or the connector when needed.
*   **Individual Piece Rendering:** It should be easy to render any individual piece (holder, lid, connector), or a combination of pieces (holder+lid).
*   **Defaults:**  Include reasonable defaults, but allow for easy customization.
*   **Sliding Fit:** There needs to be a parameter to account for slide fit.

I think that's about it! Could you generate the OpenSCAD code for this? I'm not planning on using any external libraries, so all of the code should be custom.

[Assistant]
SauceHolder-fix.scad:
```
/// * The idea here is to store any flat packaged sauce packets
/// *
$fn=100;

PieceToRender=0; //[0:All pieces, 1:Main holder, 2:Lid, 3:Connector lock, 4:Main and Lid printable]

Font=""; //FONTLIST
//mm
FontSize=8;
//mm
FontDepth=.6; //TODO allow embossing too?

/* [Main Dimensions] */
WidthOfPacket=38;
LengthOfPacket=75;
HeightOfHolder=80;

WallThickness=1.2;

Connectable=3; //[0:No, 1:Left side only, 2:Right side only, 3: Both sides]

FrontLabel_Top="Ketchup";
FrontLabel_Mid="";

IncludeRamp=1; //[0:No, 1:Yes]
//Percent of LengthOfPacket
RampPercent=.4;
//mm
RampHeight=10;

/* [Lid Dimensions] */
LidDepth=3;
LidCoversConnector=1; //[0:No, 1:Yes]

LidLabel="Ketchup";
LidLabel_Position=1; //[0:Font, 1:Middle, 2:Back]

LidLabel_LengthWise="";
LidLabel_LengthWise_Position=2; //[0:Bottom, 1:Middle, 2:Top]
LidLabel_LengthWise_Rotation=1; //[0:Left, 1:Right]

/* [Defaults - needed for other] */
//Defaults, needed for other calculations
ConnectorDepth=2;
ConnectorTopWidth=5;

/* [Hidden] */
SlideTightFit=0.25;

TWEAK=0.001;
TWEAK2=TWEAK*2;

//Helper vars
TotalWidth=WidthOfPacket+2*WallThickness;
TotalDepth=LengthOfPacket+2*WallThickness;
TotalHeight=HeightOfHolder+WallThickness;

//Render vars
Render_MainHolder = PieceToRender==0 || PieceToRender==1 || PieceToRender==4;
Render_Ramp = IncludeRamp == 1;
Render_Lid = PieceToRender==0 || PieceToRender==2 || PieceToRender==4;
Render_ConnectorLock = PieceToRender==0 || PieceToRender==3;
//RenderOffsets
RO_Lid=PieceToRender==4
        ? [-5, 0, LidDepth+WallThickness]
        : [0,0,PieceToRender==0 ? HeightOfHolder+LidDepth+5 : 0];
RO_Connector=[0,PieceToRender==0 ? TotalDepth+ConnectorDepth+5 : 0,0];

Rotate_Lid=PieceToRender==4 ? [0,180,0] : [0,0,0];

if (Render_MainHolder)
{
    OpenTopBox([WidthOfPacket,LengthOfPacket,HeightOfHolder], WallThickness)
    {
        //Front cutout
        cutoutRadius=10;
        cutoutPercent=-0.3;
        yOffset=cutoutPercent < 0 ? cutoutRadius*cutoutPercent : 0;
        tangentalOffset=cutoutRadius - sqrt(cutoutRadius*cutoutRadius - yOffset*yOffset);
        //echo(tangentalOffset);
        translate([-TWEAK,cutoutRadius*cutoutPercent,cutoutRadius+WallThickness-tangentalOffset]) rotate([0,90,0])
            cylinder(r=cutoutRadius,h=TotalWidth+TWEAK2);

        //Labels
        //  Mid
        translate([TotalWidth/2,FontDepth-TWEAK,TotalHeight/2]) rotate([90,0,0])
            linear_extrude(FontDepth)
            text(FrontLabel_Mid, FontSize, font=Font, valign="center", halign="center");
        //  Top
        translate([TotalWidth/2,FontDepth-TWEAK,TotalHeight-FontSize]) rotate([90,0,0])
            linear_extrude(FontDepth)
            text(FrontLabel_Top, FontSize, font=Font, valign="center", halign="center");
    }

    //Ramp
    if (Render_Ramp)
    {
        rampLength=RampPercent*LengthOfPacket;
        translate([0,TotalDepth-rampLength-WallThickness,WallThickness]) rotate([0,90,0])
        linear_extrude(TotalWidth)
            polygon([[0,0], [0,rampLength], [-RampHeight,rampLength]]);
    }

    //Rounded front edge
    frontEdgeRadius=WallThickness;
    translate([0,frontEdgeRadius,WallThickness]) rotate([0,90,0])
            cylinder(r=frontEdgeRadius,h=TotalWidth);

    //Ability to lock two of these together
    if (Connectable == 1 || Connectable == 3)
    {
        //Left side
        translate([0,TotalDepth,0])
            TrapazoidLock(TotalHeight, width=ConnectorTopWidth, depth=ConnectorDepth, left=false);
    }
    if (Connectable == 2 || Connectable == 3)
    {
        //Right side
        translate([TotalWidth,TotalDepth,0])
            TrapazoidLock(TotalHeight, width=ConnectorTopWidth, depth=ConnectorDepth, right=false);
    }
}

if (Render_Lid)
{
    translate(RO_Lid)
    rotate(Rotate_Lid)
    {
        lidDepth=LidCoversConnector==1 ? TotalDepth+ConnectorDepth : TotalDepth;

        difference()
        {
            union()
            {
                //lid surface
                translate([0,0,LidDepth])
                    cube([TotalWidth,lidDepth,WallThickness]);
                //lid edge
                //Here i am using a single SlideTightFit for each X and Y lengths... should be tight...
                translate([WallThickness+SlideTightFit/2,WallThickness+SlideTightFit/2,0])
                    cube([WidthOfPacket-SlideTightFit,LengthOfPacket-SlideTightFit,LidDepth+TWEAK]);
            }

            union()
            {
                //hollow top
                translate([WallThickness*2,WallThickness*2,-TWEAK])
                    cube([WidthOfPacket-WallThickness*2,LengthOfPacket-WallThickness*2,LidDepth+TWEAK]);

                //label logic
                yMovement=
                    (LidLabel_Position==0
                        ? FontSize
                        : (LidLabel_Position==1
                            ? lidDepth/2
                            : (LidLabel_Position==2
                                ? TotalDepth-FontSize
                                : 0)));
                translate([TotalWidth/2, yMovement, LidDepth+WallThickness-FontDepth+TWEAK]) rotate([0,0,0])
                    linear_extrude(FontDepth)
                    text(LidLabel, FontSize, font=Font, valign="center", halign="center");
                //  Lengthwise label
                labelRotation=LidLabel_LengthWise_Rotation==0 ? -90 : 90;
                xMovement=
                    (LidLabel_LengthWise_Position==0
                        ? FontSize
                        : (LidLabel_LengthWise_Position==1
                            ? TotalWidth/2
                            : (LidLabel_LengthWise_Position==2
                                ? TotalWidth-FontSize
                                : 0)));
                xMovement2=LidLabel_LengthWise_Rotation==0 ? xMovement : TotalWidth-xMovement;
                translate([xMovement2, yMovement, LidDepth+WallThickness-FontDepth+TWEAK]) rotate([0,0,labelRotation])
                    linear_extrude(FontDepth)
                    text(LidLabel_LengthWise, FontSize, font=Font, valign="center", halign="center");
            }
        }
    }
}

if (Render_ConnectorLock)
{
    translate(RO_Connector)
    {
        difference()
        {
            translate([-ConnectorTopWidth/2-WallThickness, 0,0])
                cube([ConnectorTopWidth+WallThickness*2,ConnectorDepth+WallThickness,TotalHeight]);
            translate([0,-TWEAK,-TWEAK])
                TrapazoidLock(TotalHeight+TWEAK2, width=ConnectorTopWidth+SlideTightFit*2, depth=ConnectorDepth);
            //NOTE: putting SlideTightFit on both sides, cause sides of box might not be nice enough
        }
    }
}

module OpenTopBox(innerSize, wallThickness)
{
    //translate([wallThickness,wallThickness,wallThickness])
    difference()
    {
        union()
        {
            cube([innerSize[0]+wallThickness*2,innerSize[1]+wallThickness*2,innerSize[2]+wallThickness]);
        }
        union()
        {
            //Inner cutout
            translate([wallThickness,wallThickness,wallThickness+TWEAK])
                cube(innerSize);

            //any additional cutouts
            children();
        }
    }
}

module TrapazoidLock(length, width=5, depth=2, angle=60, left=true, right=true)
{
    bottomDifference=depth/tan(angle);
    //echo(bottomDifference);
    echo(BottomTotalWidth=width-2*bottomDifference);
    linear_extrude(length)
        polygon([[left ? -width/2 : 0,depth], [right ? width/2 : 0,depth],
                [right ? width/2-bottomDifference : 0,0], [left ? -width/2+bottomDifference : 0,0]]);
}

```


[User]
I'd like to create a test piece for 3D printing that helps me evaluate the quality of top surfaces at different temperatures. I've done some other calibration tests, like a temperature tower, but I want to focus specifically on the flat, top surface finish. I'm thinking of a staircase-like design where each step is printed at a slightly different height, and therefore ideally at a different temperature if I modify the gcode. Each step will have a label on it, and I'd like to be able to include some notes on the finished piece as well.

Here's the basic concept:

*   **Staircase Structure:** It will have multiple steps, rising in increments. The number of steps should be adjustable.
*   **Step Dimensions:** Each step should be a rectangular prism with adjustable width, depth, and height. The step height will be set such that each layer step is on top of each other. I'd also like to include thin vertical walls on the ends of each step. One wall should be quite thin so it can be easily broken off to check the overhangs.
*   **Labels:** Each step will have a label (e.g., temperature) printed on the vertical front face. The label text and the ability to reverse the label order should be adjustable. I’d also like the font to be selectable from at least a few options.
*   **Notes:** I'd like to add a couple of lines of text at the top, like a description, material, etc, and that should be adjustable as well. I need adjustable font sizes and depth for these, as well as a selection of font types.
*   **Customization:** The font, depth, and orientation of the labels and notes should all be configurable. I'd like a way to adjust the number of facets for smoother curves.
*   **Gcode Disclaimer:** I know I need to modify the gcode to make sure the temperature is adjusted on each layer - please include some sort of placeholder disclaimer in the scad file for now (a simple text block would be fine).

I'd like this to be entirely parametric, and I'd prefer if the code was well-organized for easy modification in the future.

I think I'd like to keep it in a single file to begin with, but I might consider separate files if it gets too complicated later. I'm not using any libraries right now, but I'm open to suggestions.

[Assistant]
stair_surface_test.scad:
```
// You must modify the gcode you generate! (Cura has TweakAtX plugin, not sure about other slicers)
DoYouUnderstandYouMustModifyTheGCodeThisMakes=1; // [1:What?, 2:Yes I understand]

NumberOfSteps = 7;
Labels=["206","208","210","212","214","216","218"];
ReverseLabelOrder=0; //[0:False, 1:True]
Reverse=ReverseLabelOrder == 1;

NotesLine1="0.1 layer";
NotesLine2="inland purple";

// NOT guaranteed to work for all combinations (simply have not tested it)
StepSize=[10,10,2];
StepHeight=10;
Edge1Thickness=0.8;
Edge2Thickness=4;

FontFace=0;// [0:Arial Bold,1:Liberation Sans]
FontFacesInCustomizer=["Arial:style=Bold","Liberation Sans"]; //TODO add more
Font=FontFacesInCustomizer[FontFace];

FontDepth=0.5;
FontDirection=1; //[0:Horizontal, 1:Vertical]

//Increase the default facet number to produce smoother curves
fn_override = 0; //[0:Default, 24:Better (24), 50:High quality (50), 100:Super HQ (100)]
$fn = fn_override;

/* [Hidden] */

TWEAK=0.01;
TWEAK2=TWEAK*2;

$fn_override = $fn;
function getCustomFn(base) = max(base, $fn_override);

//My disclamer strategy...
if (DoYouUnderstandYouMustModifyTheGCodeThisMakes==2)
{
    for (i = [1:NumberOfSteps])
    {
        translate([0,StepSize[1]*(i-1),0])
            step(StepHeight*i, Reverse ? Labels[NumberOfBlocks-i-1] : Labels[i-1]);
    }
    //Notes lines:
    color("blue") translate([0,NumberOfSteps*StepSize[1]-StepSize[1]*.2,0]) rotate([90,0,-90])
        renderNotes([NotesLine1, NotesLine2], Font, StepSize[0] * 0.4, FontDepth+TWEAK);
}
else
{
    rotate([90,0,0])
    linear_extrude(2)
        union(){
        text("Learn/confirm you know how to modify", 10);
            translate([0,-12,0])
        text("the temp when generating the gcode", 10);}
}

module step(height, label)
{
    difference()
    {
        union()
        {
            //Step surface
            translate([0,0,height-StepSize[2]])
                cube(StepSize);
            //Edge1
            cube([Edge1Thickness, StepSize[1], height]);
            //Edge2
            translate([StepSize[1]-Edge2Thickness,0,0])
                cube([Edge2Thickness, StepSize[1], height]);
        }

        union()
        {
            blockWidth=StepSize[0];
            fontSizePct=0.4;
            fontXOffsetPct=0.05;
            fontZOffsetPct=0.3;

            if (FontDirection==1)
            {
                //Temp label, vertical
                translate([blockWidth-FontDepth, (StepSize[1]-(blockWidth * fontSizePct))/2, height]) rotate([90,90,90])
                            linear_extrude(FontDepth+TWEAK)
                            text(str(label), font=Font, size=blockWidth * fontSizePct);
            }
            if (FontDirection==0)
            {
                //Temp label, horizontal
                translate([blockWidth-FontDepth, FontDepth, height - 2*(blockWidth * fontZOffsetPct)]) rotate([90,0,90])
                            linear_extrude(FontDepth+TWEAK)
                            text(str(label), font=Font, size=blockWidth * fontSizePct);
            }
        }
    }
}

module renderNotes(textArray, fontFace, fontSize, fontDepth)
{
    length=len(textArray)-1;
    for (i = [length:-1:0])
    {
        label=textArray[i];

        translate([0,(fontSize*1.2)*(length-i)+fontSize*.3,0])
        linear_extrude(FontDepth+TWEAK)
            text(str(label), font=fontFace, size=fontSize);
    }
}

```


[User]
Hi, I'm looking for some help designing a 3D printable fan in OpenSCAD. I have a design in mind, and I'd like it to be fully parametric. I've also tried to design each piece to print flat on the bed with minimal overhangs.

Here's how I envision it breaking down into parts:

1.  **Fan Barrel:** This is a central cylinder with mounting points for the fan blades. It should have a central hole, and then smaller holes and mounts around its circumference that the blades will attach to.

2.  **Fan Blades:** The fan blades should be simple rectangular shapes that attach to the barrel. Each blade has a small connector that will connect to the barrel.

3.  **Base Stem:** The base stem is a mostly rectangular piece that holds the fan and the base, with some angled features. This stem is what the barrel will attach to and stand upright on.

4.  **Base:** A flat, rectangular base designed to provide stability. It also should have a hole that mates to the stem.

I'd like to be able to control the following parameters:

*   `numberOfBlades`: The number of fan blades.
*   `lengthOfBlades`: The length of each fan blade.
*   `widthOfBlades`: The width of each fan blade.
*   `thicknessOfBlades`: The thickness of each fan blade.
*   `angleOfBlades`: The angle at which the blades are offset from their mounting point.
*   `heightOfBarrel`: The height of the fan barrel.
*   `diameterOfBarrel`: The diameter of the fan barrel.

I'm not too concerned about fine-tuning aesthetic details yet; I'd rather prioritize creating a structurally sound, fully parameterized model.

Could you generate the OpenSCAD code for this, ideally in separate `.scad` files for each part? I'd also like to see an assembly file that puts everything together. I'm not using any libraries, but if you think any are needed, please make sure to mention them. Thank you!

[Assistant]
Wind_-_Part.scad:
```
// Which one would you like to see?
part = "first"; // [first:Fan Barrel,second:Fan Blades,third:Base Stem,fourth:Base]

//Resolution of the curves.(Higher = more polygons and higher load time)
$fn = 30;
numberOfBlades = 6;
// In millimeters
lengthOfBlades = 125;
// In millimeters
widthOfBlades = 30;
// In millimeters
thicknessOfBlades = 2;
// In degrees
angleOfBlades = 25;
// Height of the center cylinder
heightOfBarrel = 15;
// Diameter of the center cylinder
diameterOfBarrel = 50;

print_part();
module print_part() {
	if (part == "first") {
		fanBarrel();
	} else if (part == "second") {
		fanBlades();
	} else if (part == "third") {
		baseStem();
	} else {
		base();
	}
}

// Fan Barrel
module fanBarrel(){
    difference(){
        cylinder( d = diameterOfBarrel, h = heightOfBarrel );
        union(){
            translate([0,0,-1]){
                cylinder( d = 8, h = heightOfBarrel + 2 );
            }
            for( i = [ 1 : numberOfBlades ] ){
                rotate(a = [90, 0, i * (360/numberOfBlades)]){
                    translate([0,heightOfBarrel/2,0]){
                        rotate(a = [0,0,angleOfBlades]){
                            translate([-2.5,0,diameterOfBarrel / 4]){

                                union(){
                                    translate([0,-2.5,0]){
                                        cube([5, 5, diameterOfBarrel / 4 + 2]);
                                    }
                                    cylinder( d = 5, h = diameterOfBarrel / 4 + 2 );
                                    translate([5,0,0]){
                                        cylinder( d = 5, h = diameterOfBarrel / 4 + 2 );
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
// Fan Blades
module fanBlades(){
    union(){
        cube([lengthOfBlades,widthOfBlades,thicknessOfBlades]);
        cube([4,widthOfBlades,5]);
        translate([2,(widthOfBlades/2)-2.5,2.5]){
            union(){
                rotate(a = [0,-90,0]){ rotate([0,0,90]){
                    translate([0,-2.5,0]){
                        cube([5, 5, diameterOfBarrel / 4 + 2]);
                    }
                    cylinder( d = 5, h = diameterOfBarrel / 4 + 2 );
                    translate([5,0,0]){
                        cylinder( d = 5, h = diameterOfBarrel / 4 + 2 );
                    }
                }}
            }
        }
    }
}
// Base Stem
module baseStem(){
    union(){
        cube([lengthOfBlades * 1.3,8,8]);
        translate([lengthOfBlades * 1.3 - 4,0,0]){
            cube([4,heightOfBarrel + 50,4]);
        }
        translate([lengthOfBlades * 1.3 - 4,heightOfBarrel + 49,0]){
            cube([7,4,4]);
        }
        difference(){
            translate([lengthOfBlades * 1.3 - (100 / sqrt(2)),-40,0]){
                rotate(a = [0,0,-45]){
                    cube([4,100,4]);
                }
            }
            translate([0,-100,-1]){
                cube([lengthOfBlades * 1.3,100,10]);
            }
        }
    }
}
// Base
module base(){
    difference(){
        cube([heightOfBarrel + 68,lengthOfBlades*1.5,10]);
        translate([4,(lengthOfBlades*1.5)/2,-1]){
            cube([8,8,12]);
        }
    }
}
```
Wind.scad:
```
//Resolution of the curves.(Higher = more polygons and higher load time)
$fn = 30;
numberOfBlades = 6;
// In millimeters
lengthOfBlades = 125;
// In millimeters
widthOfBlades = 30;
// In millimeters
thicknessOfBlades = 2;
// In degrees
angleOfBlades = 25;
// Height of the center cylinder
heightOfBarrel = 15;
// Diameter of the center cylinder
diameterOfBarrel = 50;

// Fan Barrel
translate([ diameterOfBarrel / 2 , diameterOfBarrel / 2 ,0]){
    difference(){
        cylinder( d = diameterOfBarrel, h = heightOfBarrel );
        union(){
            translate([0,0,-1]){
                cylinder( d = 8, h = heightOfBarrel + 2 );
            }
            for( i = [ 1 : numberOfBlades ] ){
                rotate(a = [90, 0, i * (360/numberOfBlades)]){
                    translate([0,heightOfBarrel/2,0]){
                        rotate(a = [0,0,angleOfBlades]){
                            translate([-2.5,0,diameterOfBarrel / 4]){

                                union(){
                                    translate([0,-2.5,0]){
                                        cube([5, 5, diameterOfBarrel / 4 + 2]);
                                    }
                                    cylinder( d = 5, h = diameterOfBarrel / 4 + 2 );
                                    translate([5,0,0]){
                                        cylinder( d = 5, h = diameterOfBarrel / 4 + 2 );
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
// Fan Blades
for(i = [ 1 : numberOfBlades ]){
    translate([diameterOfBarrel / 4,(diameterOfBarrel + 5) + ((i-1) * (widthOfBlades + 2)),0]){
        union(){
            cube([lengthOfBlades,widthOfBlades,thicknessOfBlades]);
            cube([4,widthOfBlades,5]);
            translate([2,(widthOfBlades/2)-2.5,2.5]){
                union(){
                    rotate(a = [0,-90,0]){ rotate([0,0,90]){
                        translate([0,-2.5,0]){
                            cube([5, 5, diameterOfBarrel / 4 + 2]);
                        }
                        cylinder( d = 5, h = diameterOfBarrel / 4 + 2 );
                        translate([5,0,0]){
                            cylinder( d = 5, h = diameterOfBarrel / 4 + 2 );
                        }
                    }}
                }
            }
        }
    }
}
// Base Stem
translate([diameterOfBarrel,0,0]){
    union(){
        cube([lengthOfBlades * 1.3,8,8]);
        translate([lengthOfBlades * 1.3 - 4,0,0]){
            cube([4,heightOfBarrel + 50,4]);
        }
        translate([lengthOfBlades * 1.3 - 4,heightOfBarrel + 49,0]){
            cube([7,4,4]);
        }
        difference(){
            translate([lengthOfBlades * 1.3 - (100 / sqrt(2)),-40,0]){
                rotate(a = [0,0,-45]){
                    cube([4,100,4]);
                }
            }
            translate([0,-100,-1]){
                cube([lengthOfBlades * 1.3,100,10]);
            }
        }
    }
}
// Base
translate([lengthOfBlades + (diameterOfBarrel / 4 + 4),heightOfBarrel + 57,0]){
    difference(){
        cube([heightOfBarrel + 68,lengthOfBlades*1.5,10]);
        translate([4,(lengthOfBlades*1.5)/2,-1]){
            cube([8,8,12]);
        }
    }
}
```