[User]
Okay, so I was doing my math homework, and I got a little distracted. Instead of calculating the volume of this rectangular prism with a half-cylinder on one end, I decided to make it in OpenSCAD. It's supposed to be a kickboard or something. I have something basic, but I want it to be a bit better.

Here's what I'm thinking:

The basic shape is a rectangular prism. It's defined by a length, width, and thickness. I already have the basics set up, so I can specify those using variables like `length`, `width`, and `thickness`. I've also added a half-cylinder to one end, kind of like a little bumper, and I'd like to be able to control its radius.

Here's a breakdown of what I need, and what I'd like to be parametric:

*   **Overall Dimensions:**
    *   `length`: The overall length of the kickboard.
    *   `width`: The width of the kickboard.
    *   `thickness`: The thickness of the kickboard.

*   **Rectangular Prism Body:** The core shape of the kickboard, with the specified `length`, `width`, and `thickness`.

*   **Half-Cylinder Bumper:**
    *   Located at one end of the kickboard's length.
    *  A parameter to specify the radius, `bumper_radius`.
    *  Should be centered on the edge of the kickboard.
    *  I'd like the "flat" side of the half-cylinder to be flush with the end of the rectangle, making it a proper half-cylinder. I don't want it to extend out and then use a difference.

*   **Rounding Edges** I would like the corners to be rounded as well. The radius of the rounded corner should be adjustable as well, so I'll add `corner_radius`.

*   **Mounting holes** I'd also like to include some mounting holes through the main body of the board. I want to specify the number of holes `hole_count`, the diameter `hole_diameter` and the offset for the center of the holes from the sides of the rectangle. I can call the offset from the side `hole_offset`.

So, to summarize, please generate an OpenSCAD file that:
1. Creates a rectangular prism
2. Creates a half-cylinder bumper at the end of the board.
3. Includes a rounded edge on the corners of the rectangular prism
4. Includes mounting holes that run through the rectangular prism.
5. Make the `length`, `width`, `thickness`, `bumper_radius`, `corner_radius`, `hole_count`, `hole_diameter` and `hole_offset` all parameters.

I would also like to use the `round` function from the `BOSL` library for the rounded edges. I'd prefer a clean, well-commented implementation so it is easy to understand.

[Assistant]
kickboard.scad:
```
length=17.5; //[8:35]
width=15; //[5:30]
thickness=1; //[1:4]
difference()
{
union()
{
scale(0.1) cylinder(r=width*5,h=thickness*10);
translate([width/-2,0,0]) scale([width,length-(width/2),thickness]) cube(1);
translate([(width/-2)+1.25,length-(width/2),0]) scale([width-2.5,1.25,thickness]) cube(1);
translate([(width/-2)+1.25,length-(width/2),0]) scale(0.1) cylinder(r=12.5,h=thickness*10);
translate([(width/2)-1.25,length-(width/2),0]) scale(0.1) cylinder(r=12.5,h=thickness*10);
}
}
```


[User]
Okay, I'm looking to design a customizable funnel using OpenSCAD, and I have some specific requirements and parameters I'd like to control.

I need a funnel with a large opening at the top and a smaller opening at the bottom, connected by a tapered section. Here are the key parameters that need to be customizable:

1.  **Large End Diameter:** I need to be able to specify the outer diameter of the large opening at the top of the funnel.
2.  **Small End Diameter:** I need to specify the outer diameter of the small opening at the bottom of the funnel.
3.  **Wall Thickness:** I need to be able to define the thickness of the funnel walls.
4.  **Funnel Height:** The overall height of the tapered part of the funnel, excluding the bands, should be adjustable.
5.  **Top Band Height:** I'd like to have a straight, cylindrical band at the top of the funnel *before* the tapered section begins. I need to specify the height of this band.
6.  **Bottom Spout Length:** I need to specify the length of a straight cylindrical spout at the bottom of the funnel *after* the tapered section ends.

I'd like the OpenSCAD file to calculate the inner diameters based on the outer diameters and wall thickness, and then use those values to create the funnel using cylinders. The output should be a single solid funnel object.

The important thing to me is the parametric design. I need to be able to easily change any of those parameters to make different sized funnels. I don't need any fancy features, just a simple, well-defined funnel with precise dimensions. I don't expect any library usage besides the core OpenSCAD functionality.

Could you please provide an OpenSCAD file that allows me to customize all of these parameters?

[Assistant]
Customizable_Funnel.scad:
```
// preview[view:south, tilt:top diagonal]

//*********Declaration of customization variables************

//What outer diameter should the large opening have?
Large_End_Diameter = 60;

//What outer diameter should the small opening have?
Small_End_Diameter = 10;

//How thick should the walls be?
Wall_Thickness = 1; // [1:5]

//What's the overall height of the funnel?
Funnel_Height = 40;

//How tall should the band on the top be before the funnel begins?
Top_Band = 5;

//How long should the spout on the bottom be after the funnel ends?
Bottom_Spout_Length = 10;

//**********Assignment of customization vars to original scad vars***

spout_or = Small_End_Diameter/2;  //outer radius of bottom opening / spout
wall = Wall_Thickness; //wall thickness
flare_percentage = Large_End_Diameter / Small_End_Diameter * 100; // ratio of funnel opening (top) to spout (bottom), expressed as percentage
height = Funnel_Height; //total height
bottom_band=Bottom_Spout_Length;

res = 100/2; //resolution for cylinders
plane = 0.01/1;

//**********calculated variables*******************

spout_ir = spout_or - wall;
top_or = spout_or*flare_percentage/100;
top_ir = top_or - wall;

h1 = bottom_band;
h2 = height - Top_Band;
funnel_rise = height - bottom_band - Top_Band;
hi_adjust_ang = atan((top_or-spout_or)/funnel_rise)/2;
hi_adjust = wall*tan(hi_adjust_ang);

//**********begin build****************************

translate([0,0,height])mirror([0,0,1])difference(){

//**********outer shape****************************

union(){

cylinder(h=bottom_band,r=spout_or,$fn=res);
translate([0,0,h1])cylinder(h=funnel_rise,r1=spout_or,r2=top_or,$fn=res);
translate([0,0,h2])cylinder(h=Top_Band,r=top_or,$fn=res);

}

//**********inner shape****************************

union(){

cylinder(h=bottom_band+plane+hi_adjust,r=spout_ir,$fn=res);
translate([0,0,h1+hi_adjust])cylinder(h=funnel_rise,r1=spout_ir,r2=top_ir,$fn=res);
translate([0,0,h2+hi_adjust-plane])cylinder(h=Top_Band+hi_adjust+plane,r=top_ir,$fn=res);

//cube([top_or+1,top_or+1,height+1]); //cut for inspection of inner geometry

}

}

```


[User]
Okay, I'd like to create some parametric coin tubes, similar to the ones I found online, but with some specific adjustments and more flexibility. I need an OpenSCAD design that I can customize.

Here's what I need:

*   **Parametric Coin Selection:** The design should allow me to select from a list of predefined coin types. This list should include at least the following:
    *   Euro coins: 1 Euro, 2 Euro, 50 Euro cents, 20 Euro cents, 10 Euro cents, 5 Euro cents, 2 Euro cent, 1 Euro cent
    *   US Dollar coins: 1 US Dollar, 0.50 US Dollar, 0.25 US Dollar, 0.10 US Dollar, 0.05 US Dollar, 0.01 US Dollar
    *   Canadian Dollar coins: 2 Canadian Dollar, 1 Canadian Dollar, 0.50 Canadian Dollar, 0.25 Canadian Dollar, 0.10 Canadian Dollar, 0.05 Canadian Dollar, 0.01 Canadian Dollar
    The design should use a lookup table or array to store the diameter and height of each coin type.
*   **Tube Count:** I need to be able to specify how many tubes I want to generate at once, arranged side by side.
*   **Coin Capacity:** I need a parameter to specify how many coins should fit into each tube. The tubes should be slightly taller than needed so that they are easy to handle when full.
*   **Tube Generation Toggle:** I should be able to turn on or off the generation of the coin tubes, allowing me to design caps independently of tubes.
*  **Cap Generation Toggle**: I should be able to toggle on/off the generation of caps for the coin tubes.
*   **Wall Thickness:** I need a parameter to control the wall thickness of the tubes and caps.
*   **Coin Clearance:** I need a parameter to control the clearance between the coin and the inner wall of the tube to ensure smooth insertion and removal.
*   **Cap Fit Adjustment:** I need a parameter to slightly scale the cap to get a good friction fit onto the tube. The parameter should default to 0.975 as that seems to work well.
*   **Layout:** The generated tubes should be placed side by side, and if caps are generated, they should be in line with the tubes.

The design should use simple `cylinder()` and `cube()` primitives, and I need to use `difference()` and `union()` to construct the tubes and caps, with the proper placement for tube cutouts. The general idea of a circular tube with a semi-circular cutout on the bottom side should be followed.  I would like the cutouts on the cap to be an intersection of a box and cylinder.

Could you generate the OpenSCAD code for this? I don't need to import anything; please include all the code in a single .scad file.

[Assistant]
coin_tube_1_3_1.scad:
```
/*
 * PARAMETRIC COIN TUBES + CAP
 * VERSION 1.3.1
 * last update: 02/12/13
 * design by newq
 * mod kitwallace (thanks!)
 */

//
// the generated tubes insides are 2 coins higher than the number of coins they fit

coin_type = 0; // [ 0:1 Euro, 1:2 Euro, 2:50 Euro cents,  3:20 Euro cents, 4:10 Euro cents, 5:5 Euro cents, 6:2 Euro cent, 7: 1 Euro cent, 8: 1 US Dollar, 9: 0.50 US Dollar, 10: 0.25 US Dollar, 11: 0.10 US Dollar, 12: 0.05 US Dollar, 13: 0.01 US Dollar, 14: 2 Canadian Dollar, 15: 1 Canadian Dollar, 16: 0.50 Canadian Dollar, 17: 0.25 Canadian Dollar, 18: 0.10 Canadian Dollar, 19: 0.05 Canadian Dollar, 20: 0.01 Canadian Dollar]

// how many stacked coins should fit in a tube
number_of_coins = 25;
number_of_tubes = 2;

// Do you want to print the tubes?
generate_tube = 1; // [1:Yes, 0:No]
// Do you want a cap to close the tube?
generate_cap = 1; // [1:Yes, 0:No]
// thickness of wall and bottom (mm)
tube_wall = 2;
// clearance from coin to wall of tube (mm)
clearance = 0.4;
// if the cap fits too tight you might decrease slightly
fudge_factor = 0.975;

// NOTHING TO SEE HERE :)

// coin data - name, diameter, height
coins = [
              ["1 Euro", 23.25, 2.33],
              ["2 Euro", 25.75, 2.20],
              ["50 Euro cents", 24.25, 2.38],
              ["20 Euro cents", 22.25, 2.14],
              ["10 Euro cents", 19.75, 1.93],
              ["5 Euro cents", 21.25, 1.67],
              ["2 Euro cents", 18.75, 1.67],
              ["1 Euro cents", 16.25, 1.67],
              ["1 US Dollar", 26.50, 2.00],
              ["0.50 US Dollar", 30.61, 2.15],
              ["0.25 US Dollar", 24.26, 1.75],
              ["0.10 US Dollar", 17.91, 1.35],
              ["0.05 US Dollar", 21.21, 1.95],
              ["0.01 US Dollar", 19.05, 1.55],
              ["2 Canadian Dollar", 28.00, 1.80],
              ["1 Canadian Dollar", 26.50, 1.75],
              ["0.50 Canadian Dollar", 27.13, 1.95],
              ["0.25 Canadian Dollar", 23.88, 1.58],
              ["0.10 Canadian Dollar", 18.03, 1.22],
              ["0.05 Canadian Dollar", 21.2, 1.76],
              ["0.01 Canadian Dollar", 19.05, 1.45]
            ];

coin_diameter = coins[coin_type][1];
coin_height = coins[coin_type][2];

// generating the tubes
if (generate_tube) {
  assign(cyl_inner_h = (coin_height * number_of_coins) + (4 * tube_wall),
             cyl_inner_r = (coin_diameter / 2) + clearance,

             cyl_outer_h = (coin_height * number_of_coins) + (3 * tube_wall),
             cyl_outer_r = (coin_diameter / 2) + tube_wall + clearance,

             cutout_x = coin_diameter + (4 * tube_wall),
             cutout_y = (coin_diameter / 2),
             cutout_z = (coin_height * number_of_coins) + (3 * tube_wall)
             )

  for (z = [0 : (number_of_tubes-1)]){

	translate (v = [0, z * (cyl_outer_r * 2 - tube_wall), 0]){
		difference(){
			difference(){
				difference() {
					// outer tube
					cylinder(h = cyl_outer_h, r = cyl_outer_r);
					// inner tube
					translate(v = [0, 0, tube_wall]) {
						cylinder(h = cyl_inner_h, r = cyl_inner_r);
					}
				}
				// round bottom cutout
				translate (v = [0, 0, ((cutout_z / 2) + tube_wall)]){
					cube(size = [cutout_x, cutout_y, cutout_z], center = true);
				}
			}
			// cutout
			translate (v = [0, 0, -tube_wall]){
				cylinder(h = (cyl_inner_h + tube_wall), r = (cyl_inner_r - tube_wall));
			}
		}
   }
}

}

// generating the tube tops

if (generate_cap) {
   assign (cyl_inner_h = 3*tube_wall - clearance,
               cyl_inner_r = ((coin_diameter / 2) + clearance) * fudge_factor,

               cyl_outer_h = tube_wall,
               cyl_outer_r = (coin_diameter / 2) + tube_wall + clearance,

               cutout_x = coin_diameter + (4 * tube_wall),
               cutout_y = (coin_diameter / 2) * fudge_factor,
               cutout_z = 3*tube_wall - clearance
             )
    translate([1.5 * coin_diameter + tube_wall, 0, 0]){
	for (z = [0 : (number_of_tubes-1)]){

		translate (v = [0, z * (cyl_outer_r * 2 - tube_wall), 0]){
			difference(){
				union(){
					cylinder(h = cyl_outer_h, r = cyl_outer_r);
					cylinder(h = cyl_inner_h, r = cyl_inner_r);

					intersection(){
						translate([0,0,cutout_z/2]){
							cube(size = [cutout_x, cutout_y, cutout_z], center = true);
						}
						cylinder(h = cyl_outer_h+10, r = cyl_outer_r);
					}
				}

				translate([0,0,-(cyl_inner_h /2)]){
					cylinder(h = cyl_inner_h *2, r = cyl_inner_r - tube_wall);
				}
			}
		}
	}
}
}
```


[User]
Okay, I'd like to design a custom heart chain for my sweetheart, and I'm hoping you can help me with the OpenSCAD code.

Here's what I'm looking for:

I want to be able to choose between a straight chain and a closed loop chain. For the closed loop option, the hearts should form a circle.

I also need to be able to easily set the number of hearts in the chain, which should control the length of the straight chain or the circumference of the loop.

The basic heart design is good as-is, but I would like to control it's overall size.

Here's a little more detail about the specifics:

*   **Chain Type:** I'd like a parameter to switch between a straight chain (hearts placed one after the other) and a closed loop chain (hearts forming a circle). A dropdown selection would be great for this.
*   **Number of Links:** I need a parameter to set the number of heart links in the chain. A numerical slider with a reasonable min/max would be great, maybe 1 to 100.
*   **Heart Size:** I'd like a way to control the scale of the heart itself, so I can make the links bigger or smaller without altering the overall shape.
*   **Heart Orientation:** The code should make the hearts alternate orientation, so they are each mirrored from the last, like they are now.
*   **Basic Heart Shape:** The core heart shape is perfect and I don't want to change that.
*   **Default Size:** The current heart size, about 20mm in size, is a good starting point.

Essentially, I want to control the basic parameters of the heart chain, choose between a straight or circular chain, and easily adjust the size and number of hearts. Could you generate the OpenSCAD code for me, please?

[Assistant]
HeartChain.scad:
```
//Select Type of Print
Type=1; // [0:Straight Chain,1:Closed Loop]
//Select number of links
Links=15; // [1:100]

module HEARTS(){
	module HEARTHALF(h){
	  scale([25.4/90, -25.4/90, 1]) union()
	  {
		linear_extrude(height=h)
		  polygon([[-14.571719,-20.933442],[-11.207616,-24.148396],[-7.888872,-26.422799],[-4.654128,-27.828605],[-1.542030,-28.437764],[1.408781,-28.322229],[4.159661,-27.553951],[6.671966,-26.204883],[8.907054,-24.346975],[10.826281,-22.052181],[12.391004,-19.392452],[13.562581,-16.439740],[14.302367,-13.265996],[14.571719,-9.943174],[14.331995,-6.543223],[13.544550,-3.138097],[12.170743,0.200252],[6.765776,10.362507],[3.868395,15.114093],[0.774276,19.408022],[-2.566689,23.065825],[-6.204606,25.909031],[-10.189580,27.759167],[-12.327873,28.256063],[-14.571719,28.437764],[-14.571719,25.281037],[-12.239405,24.716464],[-9.824168,23.279968],[-7.410414,21.096956],[-5.082551,18.292834],[-2.924986,14.993006],[-1.022124,11.322880],[0.541627,7.407860],[1.681860,3.373354],[2.314169,-0.655233],[2.354147,-4.552496],[1.717387,-8.193028],[0.319482,-11.451424],[-1.923974,-14.202277],[-5.097388,-16.320181],[-9.285168,-17.679732],[-14.571719,-18.155522]]);
	  }
	}

	res1=50;
	difference(){
		union(){
			translate([4,0,0]) HEARTHALF(1);
			translate([-.52,0,4.17]) rotate([0,-110,0]) HEARTHALF(1);
		}
		translate([-20,-20,-2]) cube([40,40,2]);
		translate([-5,-10,-1]) cube([10,2.1,10]);
	}
}
module StraightChain(){
	for (i=[1:Links]){
		if (i%2==1){
			translate([0,10*(i),0]) HEARTS();
		} else {
			translate([1,10*(i),0]) mirror([1,0,0]) HEARTS();
		}
		//translate([0,20*(i-1),0]) HEARTS();
		//translate([1,10+20*(i-1),0]) mirror([1,0,0]) HEARTS();
	}
}
module LoopChain(){
	for (i=[1:Links]){
		rotate([0,0,i*Seg]) translate([Rad,0,0])
		if (i%2==1){
			HEARTS();
		} else {
			translate([1,0,0]) mirror([1,0,0]) HEARTS();
		}
	}
}

Pi=3.1415926535897;
Seg=360/Links;
Rad=(Links*10)/(2*Pi);

if (Type==0){
	StraightChain();
} else {
	LoopChain();
}
```


[User]
Okay, I'm looking for a parametric OpenSCAD design for a frame around an LCD screen. I've been experimenting with a simple version myself, but I need more control and want it to be cleaner.

Here’s what I'm envisioning:

**Core Frame:**

*   The frame should have a customizable **inner** rectangular area that matches the size of my LCD display. I need to be able to specify both the horizontal and vertical dimensions of the LCD.
*   The frame itself should have a border around this inner area, also customizable, let's call this the **frame border** thickness.
*   There should also be an optional inner border, which will be a smaller rectangular cutout inside the main frame. This would be a way to add an extra layer for the LCD to sit in. This can be disabled/set to 0.
*   The frame will have a specific **height**.
*   I want to specify a wall **thickness** for the frame. This should control how thick the outer walls are.

**Barbs/Clips:**

*   I need to integrate small barbs or clips into the frame's design that would help secure it in place. These will extend out from the side of the frame.
*  These barbs should have a tapered shape to make inserting and holding easier, specifically: the top part of barb needs a settable **barb size**, and the bottom part a settable **barb size bottom** (or 0 if I don't want it)
*   The barbs need to be arranged around the frame, with one set on each side (top/bottom, left/right).
*  They should be inset from the external edges of the wall by a distance dependent on the wall thickness

**General:**

*   The design should be fully parametric so I can easily adjust all the above dimensions.
*   I’d like to keep all the variables well organized and named.
*   I'd like the code to be as readable as possible.
*   I'm using OpenSCAD version 2021.01, so please ensure all the code is compatible with that version and doesn't use anything too fancy that I won't be able to easily understand. I'm not using any external libraries so I won't need any includes.

Could you create the OpenSCAD code for this?

[Assistant]
LCD_Frame_v1_1.scad:
```
/*
Create a LCD frame for 3D printing
Create by Dave Borghuis / zeno4ever
Version : 1.1
Date : 10-02-2023
For sugestions email me at : zeno4ever@gmail.com
*/

//Size of LCD
lcd_horizontal = 62;
lcd_vertical = 18;

//border around the frame
lcd_frame = 4;

//border inside frame, set to 0 to disable
lcd_inner = 2;

//hight of the frame
frame_hight = 6;

//for barb thickness of used material
material_thickness = 1;

wall_thickness = 2*1; //wall thickness * 1 to disable for thiniverse customise

//internal parameters
frame_horizontal = lcd_horizontal+lcd_frame;
frame_vertical = lcd_vertical+lcd_frame;
lcd_inner_thickness = 2*0.2; //2 layers

barb_size = 2*1; //with of barb (top)
barb_size_b = 0; //with of barb (bottom) barb_size/2;

//set resolution
$fs = 0.6*1;

//make frame
module makeframe () {
	difference () {
		difference () {	//inner frame
			cube(size = [frame_vertical,frame_horizontal,frame_hight],center=true);
			translate([0,0,-lcd_inner_thickness]) cube(size = [lcd_vertical,lcd_horizontal,frame_hight],center=true);

        	translate([0,0,0]) cube(size = [lcd_vertical-lcd_inner,lcd_horizontal-lcd_inner,frame_hight],center=true);

		}

		translate([0,0,-wall_thickness]) difference () {	//outer frame
			cube(size = [frame_vertical+wall_thickness,frame_horizontal+wall_thickness,frame_hight+wall_thickness],center=true);

        translate([0,0,0]) 			cube(size = [lcd_vertical+wall_thickness,lcd_horizontal+wall_thickness,frame_hight+wall_thickness],center=true);

		}
	}

    //inner frame
    if (false) {
        #translate([0,0,-1]) 			cube(size = [lcd_vertical+wall_thickness,lcd_horizontal+wall_thickness,frame_hight+wall_thickness],center=true);

    }

	//make barbs
	fz = -(frame_hight)/2;

	//side brad
	fx = frame_vertical/4;
	fy = (lcd_horizontal+wall_thickness)/2;

	//top/bottom brad
	fx2 = (lcd_vertical+wall_thickness)/2;
	fy2 = frame_horizontal/4;

	difference () {
		union () {
			for (factorx = [-1,1]) {
				for (factory = [-1,1]) {
					translate ([factorx*fx ,factory*fy,fz]) barb();
				}
			}

			for (factorx = [-1,1]) {
				for (factory = [-1,1]) {
					translate ([factorx*fx2 ,factory*fy2,fz]) barb();
				}
			}
		}
		cube(size = [lcd_vertical,lcd_horizontal,frame_hight],center=true);
	};
};

module barb() {
	cylinder(h = frame_hight-material_thickness-wall_thickness, r1 = barb_size_b, r2 = barb_size, center = false);
};

translate([0,0,frame_hight/2]) rotate ([0,180,0]) makeframe();
```


[User]
Okay, I'd like to design a parametric pyramid, but I need a bit more flexibility than what I currently have, and also a way to easily arrange them in specific patterns.

Here's what I'm thinking:

**Core Pyramid Design:**

*   I need both isosceles and equilateral pyramids. The base of both pyramid types will be square.
*   I want to be able to define the base side length of the square.
*   The *height* of both types of pyramids should also be configurable.
*  The code needs to use the hull() function, similar to how it is implemented in the provided code.
*  The code should take advantage of the fact the pyramids are positioned on the side to enable easier printing (no messy vertices).

**Parametric Arrangement:**

*   I want to be able to create a grid of pyramids. I should specify:
    *   The number of rows and columns.
    *   The spacing between pyramids in both the X and Y direction.

*   I would also like a polar arrangement option where the pyramids are placed in a circle. I need to specify:
    *   The number of pyramids in the circle.
    *   The radius of the circle on which the pyramid bases will be centered.

* I need the ability to rotate each pyramid after it's been arranged, using a global rotational modifier.

**Additional considerations:**
*   The pyramids should sit "on their side" so that they are easier to print, with the base at the bottom and the vertex to the side. (Like in my original file).
*   I'd like to use units in millimeters, so that it’s easy to set the right scale for printing.
*  I need the program to include the `build_plate()` module from the `utils` library, as specified in my attached code.
*  I need the program to include the `Equilateral_pyramid()` and `Isosceles_pyramid()` modules from the `solids` library, as specified in my attached code.

To summarize, I need a parametric OpenSCAD file that creates both isosceles and equilateral pyramids, allows me to arrange them in a grid or circle pattern, and be able to globally rotate them. I have attached example code that has the basic functionality and should help to establish the correct shape. The example code uses the `build_plate` and `solids` libraries, and your solution should assume these are available as well.

[Assistant]
Parametric_pyramid.scad:
```
use<utils/build_plate.scad>;
use<solids.scad>;

Pyramid_type = 1; // [1:Isosceles,2:Equilateral]

// In millimiters
Base_side_size = 30; // [10:100]

Pyramid_number = 6; // [1:9]

height = Base_side_size;

dist = height;
num = Pyramid_number;

angle = atan(0.5); // Basic trigonometry

//for display only, doesn't contribute to final object
build_plate(3,200,200);

if(Pyramid_type == 2) translate([0,0,Base_side_size/3]) { // Equilateral

Equilateral_pyramid(height);

if(num > 1)
for(i=[0:num-2])
rotate([0,0,i*90])
  translate([0,dist,0])
    Equilateral_pyramid(height);

if(num > 5)
  for(i=[0:num-6])
    rotate([0,0,45+i*90])
      translate([0,dist*1.5,0])
        Equilateral_pyramid(height);

} else translate([0,0,Base_side_size/2]) { // Isosceles

for(i=[0:num-1])
rotate([0,0,i*90])
  translate([0,dist,0])
    Isosceles_pyramid(height);

if(num > 4)
  for(i=[0:num-5])
    rotate([0,0,45+i*90])
      translate([0,dist*1.5,0])
        Isosceles_pyramid(height);

if(num > 8) // *Yaomingface*
  translate([0,-dist*1.5,0])
     Isosceles_pyramid(height);
}

module Equilateral_pyramid(height) {
    edge = height;
    tinyValue = 0.001;
    rotate([90+45,0,0])
      hull() {
          cube(size=[edge, edge, tinyValue], center=true);
          translate([0, 0, height/2]) cube(size=[tinyValue, tinyValue, tinyValue], center=true);
      }
}

module Isosceles_pyramid(height) {
    edge = height;
    tinyValue = 0.001;
    rotate([+90+angle,0,0])
      hull() {
          cube(size=[edge, edge, tinyValue], center=true);
          translate([0, 0, height]) cube(size=[tinyValue, tinyValue, tinyValue], center=true);
      }
}

```


[User]
Okay, I'm looking for an OpenSCAD design for customizable, fillable weights, similar to the one I found online, but with more flexibility.  I want to be able to easily adjust the shape, size, and weight of the final product, and I need different export options, too. I need both barbell and kettlebell styles.

Here's what I have in mind:

**General Requirements:**

*   **Parametric Design:** The entire design should be driven by parameters, allowing me to easily adjust things like weight, dimensions, and the type of filler material.
*   **Fillable:** The weights should be hollow and designed to be filled with different materials (water, sand, pennies, or lead shot).
*   **Printable:** The design should be printable on a standard 3D printer (at least a 6"x6" bed).
*   **Export Modes:** I need three export options:
    *   **Preview Mode:**  Displays the complete weight assembly, including the handle and weight container.
    *   **Handle Only:** Exports only the handle (barbell or kettlebell style).
    *   **Weight Container Only:** Exports only the fillable container.
*   **Units:** I'd like to specify the target weight in either kilograms or pounds.
*   **Material Density:**  The design should account for the density of the filler material when calculating the container's required volume.
*   **Text Labels:** The design should include text labels on the weight container, indicating the target weight and type of fill material. These should be mirrored on the opposite side of the weight.

**Specific Features:**

*   **Weight Types:**
    *   **Barbell/Dumbbell:** This should have two fillable containers connected by a bar handle.
    *   **Kettlebell:** This should have a single fillable container with a loop-style handle.
*   **Barbell Handle:**
    *   The handle should have end caps and a textured grip area.
    *   The end caps should connect to the weight containers with threads (a feature I saw in the example code), and should have a collar to secure the weight.
*   **Kettlebell Handle:**
    *   The handle should be a smooth, ergonomic loop, connected to the top of the weight container, ideally using a similar threaded collar connection to the weight container.
*   **Weight Container Shape:**
    *   I'd like the weight container to be roughly spherical, but with a faceted look. It doesn't have to use exactly the same polyhedron geometry I saw in the online example - it just needs to look similar to what I saw. This shape should be parametric enough to let me adjust the number of facets in the future.

**Parameters I'd Like to Control:**

*   `exportMode`: (0: Preview, 1: Handle, 2: Weight Container)
*   `fillMaterial`: (e.g., Water, Sand, Pennies, Lead Shot)  This should ideally use a list that maps to density values.
*   `weightUnit`: (Kilograms or Pounds)
*   `weight`: (Target weight)
*   `weightType`: (Dumbbell or Kettlebell)
*   `weightRadius`: (Starting radius of the weights, which should affect the size of the handle etc.)
    *   The `weightRadius` should also be used to scale the text elements.

**Libraries:**

*   I know this will require the `write/Write.scad` library, as the example I have uses that for the text. I can provide this library as needed.

**Output:**

I'm looking for a single `.scad` file that includes all of this, please. Please make sure that your parametric design is well-commented and easy to adjust.  I'd also like to know how to easily add more materials to the `fillMaterial` options in the future.

[Assistant]
Weight.scad:
```
//  SCAD Mesh File
//  D. Scott Nettleton
//  Weight
//  This mesh is for use with the OpenSCAD

use <write/Write.scad>

exportMode = 0;  // [0:Preview,1:Handle,2:Weight]

// Density in kg/m^3
fillMaterial = 1500;  //  [1000:Water,1500:Sand,7000:Pennies,8400:Lead Shot]

// Convert units if neccessary
weightUnit = 2.20462;  //  [1:Kilograms,2.20462:Pounds]

// Total weight in given units
weight = 10;  //  [1:50]

weightType = 2;  //  [2:Dumbell,1:Kettle]

if (exportMode == 0) { // Preview Mode
  if (weightType == 2) { // Dumbell
    translate([68,0,weightRadius*13.377])
    rotate(a=-90, v=[0,1,0]) {
      union() {
        drawBarbell();
        drawWeightContainer();
        translate([0,0,150])
          rotate(a=180, v=[0,1,0])
            drawWeightContainer();
      }
    }
  }
  else { // Kettle
    translate([0,0,volumeDepth*10+8]) {
      drawKettleHandle();
      drawWeightContainer();
    }
  }
}
else if (exportMode == 1) { //  Handle
  if (weightType == 2) { // Dumbell
    translate([68,0,weightRadius*12+7])
    rotate(a=-90, v=[0,1,0]) {
      drawBarbell();
    }
  }
  else { // Kettle
    drawKettleHandle();
  }
}
else if (exportMode == 2) { //  Weight
    translate([0,0,volumeDepth*10+8]) {
      drawWeightContainer();
    }
}

module drawBarbell() {
  union() {
    translate([0,0,150])
      rotate(a=180,v=[0,1,0])
        drawBarbellCap();
    translate([0,0,17])
      cylinder(h=116, r1=12.5, r2=12.5, center=false, $fn=16);
    drawBarbellCap();
  }
}

weightRadius = 6.5;  // 6.5 cm
collarVolume = 3.14159*(weightRadius*0.9)*(weightRadius*0.9)*4;
targetVolume = ((weight/weightUnit/weightType)/fillMaterial)*1000000 - collarVolume;  //cubic centimeters
volumeDepth = targetVolume/147.875;

module drawKettleHandle() {
  difference() {
    union() {
      translate([weightRadius*5, 0, 18]) {
        rotate(a=20, v=[0,1,0])
        union() {
          sphere(r=12.5, center=true, $fn=32);
          cylinder(h=80, r1=12.5, r2=12.5, center=false, $fn=32);
          translate([0,0,80])
            sphere(r=12.5, center=true, $fn=32);
          translate([0,0,80])
            rotate(a=-110, v=[0,1,0])
              cylinder(h=122, r1=12.5, r2=12.5, center=false, $fn=32);
        }
      }
      translate([-weightRadius*5, 0, 18]) {
        rotate(a=-20, v=[0,1,0])
        union() {
          sphere(r=12.5, center=true, $fn=32);
          cylinder(h=80, r1=12.5, r2=12.5, center=false, $fn=32);
          translate([0,0,80])
            sphere(r=12.5, center=true, $fn=32);
        }
      }
    }
    cube(size=[weightRadius*20, weightRadius*20, 30], center=true);
  }
  drawBarbellCap();
}

module drawBarbellCap() {
  difference() {
    cylinder(h=18, r1=weightRadius*12+7, r2=weightRadius*12+7, center=false, $fn=32);
    drawThreads(15, weightRadius*12, 3, 0.15, 1);
  }
}

module drawWeightContainer() {
  text = str(weight/weightType, (weightUnit == 1) ? " kg" : " lbs");
  translate([0,0,-volumeDepth*10-5+3])
  union() {
    difference() {
      drawWeight();
      translate([0,0,-3]) {
        mirror([1,0,0]) {
          write(text, t=2, h=weightRadius*3.5, font="write/orbitron.dxf", center=true);
          translate([0,-weightRadius*4, 0]) {
            if (fillMaterial == 1000) {
              write("Fill With Water", t=2, h=weightRadius*1.5, font="write/Letters.dxf", center=true);
            }
            else if (fillMaterial == 1500) {
              write("Fill With Sand", t=2, h=weightRadius*1.5, font="write/Letters.dxf", center=true);
            }
            else if (fillMaterial == 7000) {
              write("Fill With Pennies", t=2, h=weightRadius*1.5, font="write/Letters.dxf", center=true);
            }
            else if (fillMaterial == 8400) {
              write("Fill With Shot", t=2, h=weightRadius*1.5, font="write/Letters.dxf", center=true);
            }
          }
        }
      }
    }
    difference() {
      translate([0,0,volumeDepth*10+1.5])
        drawThreads(15, weightRadius*12, 3, 0.15, 1);
      drawCollar();
    }
  }
}

module drawThreads(length, radius, threadDepth, tpm, leftRight = 0) {
  if (exportMode > 0) {
    mirror([leftRight,0,0])
  	linear_extrude(height=length, twist=360*length*tpm, center=false, $fn=32)
  	  translate([threadDepth,0,0])
  	    circle(r=radius-threadDepth);
  }
}

module drawCollar() {
  if (exportMode > 0) {
    translate([0,0,volumeDepth*10+1.25])
      cylinder(h=46,r1=weightRadius*9,r2=weightRadius*9, $fn=32);
  }
}

module drawWeight() {
  polyhedron(
  points=[
    [-5.491517066955566*weightRadius,13.255526542663574*weightRadius,-3],
    [-5.5304107666015625*weightRadius,13.376564979553223*weightRadius,3.9257373809814453],
    [5.509345054626465*weightRadius,13.248157501220703*weightRadius,-3],
    [5.548361301422119*weightRadius,13.369129180908203*weightRadius,3.9257373809814453],
    [13.282904624938965*weightRadius,5.479954719543457*weightRadius,-3],
    [13.37697982788086*weightRadius,5.529995918273926*weightRadius,3.9257373809814453],
    [13.275522232055664*weightRadius,-5.498571395874023*weightRadius,-3],
    [13.36954402923584*weightRadius,-5.548775672912598*weightRadius,3.9257373809814453],
    [5.491516590118408*weightRadius,-13.256356239318848*weightRadius,-3],
    [5.530409812927246*weightRadius,-13.377394676208496*weightRadius,3.9257373809814453],
    [-5.50934362411499*weightRadius,-13.248984336853027*weightRadius,-3],
    [-5.54836368560791*weightRadius,-13.36995792388916*weightRadius,3.9257373809814453],
    [-13.282904624938965*weightRadius,-5.4807844161987305*weightRadius,-3],
    [-13.37697982788086*weightRadius,-5.530825138092041*weightRadius,3.9257373809814453],
    [-13.275521278381348*weightRadius,5.497743606567383*weightRadius,-3],
    [-13.369544982910156*weightRadius,5.547945976257324*weightRadius,3.9257373809814453],
    [-5.5304107666015625*weightRadius,13.376564979553223*weightRadius,8.43543815612793+(volumeDepth-1)*10],
    [5.548361301422119*weightRadius,13.369129180908203*weightRadius,8.43543815612793+(volumeDepth-1)*10],
    [13.37697982788086*weightRadius,5.529995918273926*weightRadius,8.43543815612793+(volumeDepth-1)*10],
    [13.36954402923584*weightRadius,-5.548775672912598*weightRadius,8.43543815612793+(volumeDepth-1)*10],
    [5.530409812927246*weightRadius,-13.377394676208496*weightRadius,8.43543815612793+(volumeDepth-1)*10],
    [-5.54836368560791*weightRadius,-13.36995792388916*weightRadius,8.43543815612793+(volumeDepth-1)*10],
    [-13.37697982788086*weightRadius,-5.530825138092041*weightRadius,8.43543815612793+(volumeDepth-1)*10],
    [-13.369544982910156*weightRadius,5.547945976257324*weightRadius,8.43543815612793+(volumeDepth-1)*10],
    [-5.466272354125977*weightRadius,13.194588661193848*weightRadius,12.0+(volumeDepth-1)*10],
    [5.484016418457031*weightRadius,13.187253952026367*weightRadius,12.0+(volumeDepth-1)*10],
    [13.221841812133789*weightRadius,5.454761028289795*weightRadius,12.0+(volumeDepth-1)*10],
    [13.214489936828613*weightRadius,-5.473294734954834*weightRadius,12.0+(volumeDepth-1)*10],
    [5.46627140045166*weightRadius,-13.195416450500488*weightRadius,12.0+(volumeDepth-1)*10],
    [-5.484017848968506*weightRadius,-13.188077926635742*weightRadius,12.0+(volumeDepth-1)*10],
    [-13.221843719482422*weightRadius,-5.455591201782227*weightRadius,12.0+(volumeDepth-1)*10],
    [-13.214491844177246*weightRadius,5.472464561462402*weightRadius,12.0+(volumeDepth-1)*10],
    [-4.999999523162842*weightRadius,10.0*weightRadius,12.0+(volumeDepth-1)*10],
    [5.0*weightRadius,10.0*weightRadius,12.0+(volumeDepth-1)*10],
    [10.0*weightRadius,4.999999523162842*weightRadius,12.0+(volumeDepth-1)*10],
    [10.0*weightRadius,-5.0*weightRadius,12.0+(volumeDepth-1)*10],
    [4.999999046325684*weightRadius,-10.0*weightRadius,12.0+(volumeDepth-1)*10],
    [-5.0*weightRadius,-10.0*weightRadius,12.0+(volumeDepth-1)*10],
    [-10.0*weightRadius,-5.0*weightRadius,12.0+(volumeDepth-1)*10],
    [-10.0*weightRadius,5.0*weightRadius,12.0+(volumeDepth-1)*10],
    [-4.999999046325684*weightRadius,9.999998092651367*weightRadius,2.0],
    [5.0*weightRadius,10.0*weightRadius,2.0],
    [10.0*weightRadius,5.0*weightRadius,2.0],
    [9.999998092651367*weightRadius,-5.0*weightRadius,1.9999995231628418],
    [4.999999046325684*weightRadius,-10.0*weightRadius,2.0],
    [-5.0*weightRadius,-9.999998092651367*weightRadius,2.0],
    [-10.0*weightRadius,-4.999999523162842*weightRadius,1.9999995231628418],
    [-10.0*weightRadius,5.0*weightRadius,2.0]
  ],
  triangles=[
    [0,3,1],
    [2,5,3],
    [4,6,5],
    [6,8,7],
    [8,10,9],
    [10,12,11],
    [5,17,3],
    [14,1,15],
    [12,15,13],
    [0,4,2],
    [19,26,18],
    [7,18,5],
    [3,16,1],
    [9,19,7],
    [11,20,9],
    [13,21,11],
    [15,22,13],
    [1,23,15],
    [28,36,27],
    [22,29,21],
    [18,26,17],
    [21,28,20],
    [16,31,23],
    [17,24,16],
    [20,27,19],
    [23,30,22],
    [37,44,36],
    [31,39,30],
    [27,35,26],
    [30,38,29],
    [26,34,25],
    [29,37,28],
    [24,32,31],
    [25,33,24],
    [41,42,40],
    [32,47,39],
    [33,40,32],
    [36,43,35],
    [39,46,38],
    [35,43,34],
    [38,46,37],
    [34,41,33],
    [2,3,0],
    [4,5,2],
    [5,6,7],
    [7,8,9],
    [9,10,11],
    [11,12,13],
    [18,17,5],
    [0,1,14],
    [14,15,12],
    [8,6,4],
    [12,10,8],
    [14,12,0],
    [0,8,4],
    [12,8,0],
    [27,26,19],
    [19,18,7],
    [17,16,3],
    [20,19,9],
    [21,20,11],
    [22,21,13],
    [23,22,15],
    [16,23,1],
    [27,36,35],
    [30,29,22],
    [17,26,25],
    [29,28,21],
    [24,31,16],
    [25,24,17],
    [28,27,20],
    [31,30,23],
    [45,44,37],
    [30,39,38],
    [26,35,34],
    [29,38,37],
    [25,34,33],
    [28,37,36],
    [31,32,39],
    [24,33,32],
    [40,42,47],
    [47,42,46],
    [46,42,45],
    [45,42,44],
    [44,42,43],
    [40,47,32],
    [41,40,33],
    [44,43,36],
    [47,46,39],
    [34,43,42],
    [37,46,45],
    [42,41,34]
  ]);
}

```


[User]
Okay, I'm looking to design a custom handle for my broom, something that will be more comfortable to grip. I'm thinking about a design where there are these sort of indented, bulbous finger grips along the length of the handle, so my fingers can comfortably rest there while using the broom.

Here's what I'm envisioning and some specific parameters I'd like to be able to control:

1.  **Broom Handle Diameter:** I need a parameter, probably called `stick_diameter`, to define the diameter of the broom handle itself. This will be the inner diameter of the new handle. I expect to change this based on the broom, but I have a common one that's around 25mm.

2.  **Finger Spacing:** I want to specify the average distance between my fingers when gripping the handle. This will affect the spacing of the indentations. I'm thinking `finger_spacing` should be a parameter, and I imagine it will be around 23mm. I want to be able to adjust this if it doesn't feel quite right.

3.  **Handle Padding:** I'd like a way to control how much thicker the handle is compared to the original broom handle. I’m thinking something like `padding` that could be set to “A lot thicker”, "Some", or "Only a little" with a default of "Some". Internally, it should probably use a numerical value that controls how much the handle is padded. This padding thickness should also affect the size of the indentations, making them larger when the padding is larger, proportional to the padding amount.

4.  **Indentation Geometry:** I’d like the indentations to be generated via `rotate_extrude` of a circle. I think a smooth, circular cross-section for the indentation is best. I'd also like to control the amount of subdivision used to make this circle smooth with a parameter called `$fn`.

5. **Handle Length:** The length of the handle should be based on the `finger_spacing`. I was thinking 4 times the `finger_spacing` plus 10mm of extra length for each of the ends. I’d like this to be automatically computed based on `finger_spacing` and for there to be some length added to both ends.

6. **Indentation Edge:** I'd like the indentations to start a distance away from the ends of the handle. I'd like to control this distance via a parameter called `edge`, and for this to be dependent on the `padding` plus an additional 5 mm.

7.  **Inner Cylinder:** Inside, there should be a cylindrical hollow to fit over the broom handle. It should have the same inner diameter as the broom handle and should extend the full length of the handle minus the edge.

I'm hoping to use OpenSCAD to generate this. I don't want to use any non-standard libraries, so standard OpenSCAD should be sufficient.

Could you write the OpenSCAD code that would handle these parameters and generate the handle? Thanks!

[Assistant]
MopHandle.scad:
```
// preview[view:north, tilt:top diagonal]

//What diameter does the broom handle have?
stick_diameter = 25;

//On average, how far apart are your fingers (center to center)?
finger_spacing = 23; //[10:35]

//How much thicker do you want the handle to be than the original broom handle?
padding = "Some"; //[A lot thicker,Some,Only a little]

if(padding=="A lot thicker") assign(pad=12) handle(pad);
if(padding=="Only a little") assign(pad=3) handle(pad);
if(padding=="Some") assign(pad=7) handle(pad);

module handle(padd){

	ir=stick_diameter/2;
	or=ir+padd;
	hi=4*finger_spacing+10;
	edge=padd+5;
	res=50*1;

	difference(){
		cylinder(r=or,h=hi);

		union(){
			for(i=[0:3])translate([(or-ir)/2,0,edge+((hi-2*edge)*(i+.5)/4)]){
				rotate_extrude(convexity = 10, $fn = res)
				translate([or*(2+.4*(12/padd)), 0, 0])
				circle(r = (1+.4*(12/padd))*or, $fn = res);
			}
			translate([0,0,edge])cylinder(r=ir,h=hi-edge);
		}
	}

}
```


[User]
Okay, I'd like a parametric OpenSCAD design for a simple paper stand, similar to the one I already have, but I want more control over some aspects and a cleaner implementation.

Here's what I'm looking for:

*   **Core Functionality:** It needs to hold papers upright at a slightly tilted angle. Basically, a base with a back support, a little lip to hold the paper at the bottom, and a holdback to keep the papers from falling forward.
*   **Key Dimensions (Parameters):**
    *   `stand_width`: The width of the stand (and therefore the paper it can hold). I'd like to set this in mm.
    *   `paper_thickness`: This defines how deep the paper lip/tray is. I'll probably be using this with stacks of paper, so I'd like it to be a bit larger.
    *   `paper_height`: The height of the back support for the paper.
    *   `holdback_height`: The height of the holdback lip.
    *  `wall_thickness`: The thickness of all the structural parts.
    *   `paper_angle`: This sets the tilt of the back support and thus how leaned back the paper is, in degrees.

*   **Additional Features:**
    *   **Tail:** Include a tail at the back of the base to prevent it from tipping backwards, as in my current design. This should be parametric, so I can set its length.  `tail_length`
     * **Clear preview:** Ensure that in `print_mode="preview"`, the design is viewable normally, but that when `print_mode="print"` the design is automatically rotated for printing on its side (without supports). This should be an easy switch for the user via the parameter `print_mode`
    *   **Fuzz factor:** Allow a small tolerance value for `paper_thickness`, to deal with manufacturing issues or slight paper variations.

*   **Design:** The design should be mostly box-like, but with the back support tilted. I like the idea that the back of the structure has a support that follows the tilt of the back support and makes it rigid. Also, make sure that the tail is part of the base, so that it also follows the angle of the back support.

*   **OpenSCAD Style:**
    *  Use modules for the main features to make the code easier to understand and change.
    *   Use parameters for all important dimensions.
    *   Keep it as simple as possible, without any fancy libraries for now.
    * The design should be placed in the origin and be centered in the Y-direction. This way the user can position the object anywhere easily.

I think that covers everything. I'm looking forward to seeing what you can come up with!

[Assistant]
PaperStand.scad:
```
//preview[view:south west, tilt:top diagonal]
stand_width = 80; //[20:100]
paper_thickness = 16; //[5:50]
paper_height = 115; //[50:300]
holdback_height = 12; //[5:50]
wall_thickness = 3; //[1:10]
fuzz = 0.01;
//Paper angle
rotate_angle = 15; //[0:85]
rotate_a = -rotate_angle;
//extra part on the back to prevent tipping over
tail_length=20; //[0:100]
//IMPORTANT set this when exporting to STL (to print on its side !! supportless)
print_mode = "preview"; //[preview,print]

start();

module start(){
	if (print_mode == "preview"){
		difference(){
 			ding();
			//maak onderkant plat
			translate([-300,-300,-600]) cube([600,600,600]);
		}
	} else {
		rotate(-90,[0,1,0]){
			difference(){
 				ding();
				//maak onderkant plat
				translate([-300,-300,-600]) cube([600,600,600]);
			}
		}
	}
}

module ding(){
	rotate(rotate_a,[1,0,0]) a();
	b();
	c();
}

module a(){
	//back, papier leunt hier tegenaan
	cube([stand_width, wall_thickness,paper_height]);
	//bakje, papier staat hierop
	translate([0,-paper_thickness+fuzz,0]) cube([stand_width, paper_thickness, wall_thickness]);
	//holdback, dit houd tegen
	translate([0,-paper_thickness+fuzz,0]) cube([stand_width, wall_thickness,holdback_height]);
}

module b(){
	//onderkant
	cube([stand_width,sin(rotate_a*-1)*paper_height,wall_thickness]);
	//achterkant
	translate([0,sin(rotate_a*-1)*paper_height,0]) cube([stand_width,wall_thickness,cos(rotate_a*1)*paper_height]);
}

module c(){
	cube([stand_width,sin(rotate_a*-1)*paper_height+tail_length,wall_thickness]);
}
```


[User]
Okay, I'd like to create a flower using a set of vases, and I need an OpenSCAD file to do that parametrically.

The basic idea is to use the provided 'PetalVaseCreator.scad' file as inspiration, but instead of creating a single vase with multiple petals, I want to create *separate* vase objects that I can then arrange into a flower shape in the main module.

Here's the breakdown of what I need:

1.  **Individual Vase Modules:** Instead of the `makePetal()` module, I need a module called `vase()` that creates a single vase. This module should accept the same parameters as the global variables in `PetalVaseCreator.scad`, so we can customize each individual vase. Specifically, I want to be able to control the following for each vase:
    *   `Number_of_Petals`: This determines the number of "petals" the vase is constructed from. Valid range is 3 to 8.
    *   `Vase_Height`: This controls the height of the vase body, not including any neck. Valid range is 25 to 100.
    *  `Neck_Style`: Controls the style of the vase neck: "none", "angled", "bump", "fluted".

2.  **Flower Arrangement:** The main module should be named `flower()`. This module will arrange several vase modules.
    *   I want to control the number of vases used to form the flower.
    * I want to control the rotation angle of each vase individually.
    * I want to control the x,y coordinate offset of each vase individually.
    * I want to be able to change the vase parameters for each vase individually.

3. **No Global Variables**: Do not rely on global variables, instead, be sure to include all parameters as module arguments.

4. **Libraries**: I don't expect you to include any libraries besides the basic built-in OpenSCAD functions, but make sure to note if you use any third-party libraries (like MCAD, BOSL, etc.).

Here’s an example of how I want to call the `flower()` module:
```openscad
flower(
    vase_count = 6,
    vase_parameters = [
    [Number_of_Petals=4, Vase_Height=50, Neck_Style="bump", rotate_angle = 0, x_offset = 30, y_offset=0],
    [Number_of_Petals=4, Vase_Height=60, Neck_Style="angled", rotate_angle = 60, x_offset = 30, y_offset =0],
    [Number_of_Petals=5, Vase_Height=70, Neck_Style="fluted", rotate_angle = 120, x_offset=30, y_offset=0],
    [Number_of_Petals=5, Vase_Height=60, Neck_Style="bump", rotate_angle = 180, x_offset=30, y_offset =0],
    [Number_of_Petals=6, Vase_Height=60, Neck_Style="angled", rotate_angle = 240, x_offset =30, y_offset=0],
    [Number_of_Petals=4, Vase_Height=50, Neck_Style="fluted", rotate_angle = 300, x_offset=30, y_offset=0]
     ]
);
```

This would create a flower with six vases, each with different heights, number of petals, neck styles, rotation angles, and offsets.

Basically, I need to recreate the 'PetalVaseCreator.scad' logic to generate an individual vase, and then arrange multiple vases in a flower shape as described. I want to customize the vase parameters, rotation, and offsets for each individual vase within a flower.

[Assistant]
PetalVaseCreator.scad:
```
// Petal Vase Creator
// by g.wygonik Feb 2013
// Creative Commons - Attribution Share Alike

Number_of_Petals = 4; // [3:8]

// in mm (not including neck)
Vase_Height = 50; // [25:100]

Neck_Style = "bump"; // [none,angled,bump,fluted]

// non-user setting variables
petals = Number_of_Petals + 0.0;
factors = [1,1,1,82.5,90.5,95,97.5,100.5,103,105];
maxSize = ((factors[petals])/petals)-1.85;
overallHeight = Vase_Height+0.0;
topHeight = 3 + 0.0;
neckHeight = 5 + 0.0;
height = overallHeight - topHeight;

// main loop

for (i = [0:petals-1]) {
	rotate([0,0,i*(360/petals)]) makePetal();
}

// makes a "petal" comprised of an outer shape with an inner shape removed,
// a top layer for final stability and straight-edged opening, and
// some style of neck (including none) for ornamentation

module makePetal() {
	union() {

		difference() {
				outer();
				inner();
		}
		top();

		if (Neck_Style != "none") {
			neck();
		}
	}
}

// the outer shape is two cylinders with a bounding hull
module outer() {
			hull() {
			   translate([30,0,0]) cylinder(r=maxSize, h=height, $fn=36);
			   translate([5+petals-4,0,0]) cylinder(r=3, h=height, $fn=36);
			}
}

// inner is also two cylinders with a bounding hull, however one of the cylinders
// gets smaller at the top so as to not leave the top having open overhang. This
// gives more space at the bottom of the vase than the top.
module inner() {
			hull() {
			   translate([30,0,4]) cylinder(r1=maxSize-3, r2=13-petals, h=height, $fn=36);
			   translate([6+petals+12,0,4]) cylinder(r1=1, r2=0.1, h=height, $fn=36);
			}
}

// the top repeats the outer hull, but removes a consistent single hole for opening
module top() {
	difference() {
		translate([0,0,height]) hull() {
			   translate([30,0,0]) cylinder(r=maxSize, h=topHeight, $fn=36);
			   translate([5+petals-4,0,0]) cylinder(r=3, h=topHeight, $fn=36);
			}

		translate([30,0,4]) cylinder(r=13-petals, h=height+5, $fn=36);
	}
}

// creates the various "neck" types based on user selection. These are mostly
// variations of cylinders and extruded circles as toruses (torii?)
module neck() {

	if (Neck_Style == "angled") {
		translate([30,0,overallHeight])
		difference() {
			cylinder(r1=16-petals, r2=15-petals ,h=neckHeight, $fn=36);
			translate([0,0,-1]) cylinder(r=13-petals,h=neckHeight+2, $fn=36);
		}

		translate([30,0,overallHeight])
		difference() {
			rotate_extrude(convexity = 10, $fn=36) translate([15.5-petals, 0, 0]) circle(r = 1, $fn=36);
			translate([-15,-15,-5]) cube([30,30,5]);
		}

		translate([30,0,overallHeight])
		difference() {
			rotate_extrude(convexity = 10, $fn=36) translate([14-petals, neckHeight, 0]) circle(r = 1, $fn=36);
			translate([-15,-15,neckHeight-5]) cube([30,30,5]);
		}
	} else if (Neck_Style == "bump") {
		translate([30,0,overallHeight])
		difference() {
			rotate_extrude(convexity = 10, $fn=36) translate([14-petals, 0, 0]) circle(r = 3, $fn=36);
			translate([-15,-15,-5]) cube([30,30,5]);
			translate([0,0,-5]) cylinder(r=13-petals, h=height+15, $fn=36);
		}

	} else if (Neck_Style == "fluted") {
		translate([30,0,overallHeight])
		difference() {
			cylinder(r=16-petals ,h=10, $fn=36);
			rotate_extrude(convexity = 10) translate([20-petals, 2, 0]) scale([1,1.25,1]) circle(r = 6, $fn=36);
			translate([0,0,-1]) cylinder(r=13-petals,h=12, $fn=36);
		}

	}
}

```


[User]
Okay, I'm looking to design a heart-themed ring, and I'd like it to be highly customizable. I've got some ideas based on an existing design, but I need a more robust parametric version.

Here's what I'm thinking:

1.  **Ring Size:** I need to be able to specify the ring size, ideally based on US ring sizes (diameter in mm). I'd like a variable where I can input the US ring size, and the script should automatically calculate the inner radius.
2.  **Ring Thickness:**  I want to control the thickness of the ring, this should be a variable that affects the cross sectional thickness of the ring. I'd like to start with options for "Normal" and "Thick", corresponding to something like 1.6mm and 2.4mm, respectively. I should be able to easily set custom values here.
3.  **Ring Width:** I need to be able to set the overall width of the ring (the dimension parallel to the finger). I'd like a range for this, probably between 6mm and 12mm.
4. **Heart Count:** I want to be able to change the number of hearts that go around the ring's circumference. I'd like to be able to specify from between 3 and 11 hearts.
5.  **Heart Size:** The size of each heart should be automatically calculated to fit around the ring without overlapping. It should take into account both the ring width and the circumference, and use the smaller of the two available constraints. They should be scaled appropriately to ensure they fit correctly.
6. **Heart Shape:** The hearts themselves should be generated using a simple extrusion of a 2D heart shape. It needs to look like a classic heart shape and be a bit more rounded than a simple two triangle connected by a rectangle.
7.  **Placement:** The hearts should be evenly spaced around the outer edge of the ring.
8.  **OpenSCAD Structure:** The code should be well-structured, using modules and variables to make it easy to modify the design later. All critical parameters need to be user-modifiable.

I'd like the design to use a difference operation to create the ring and to subtract the hearts. I'd also like the hearts to be rotated 90 degrees so that they stick outwards from the ring face, with each heart's long dimension parallel to the ring axis.

Essentially, I want a parametric ring where I can easily adjust the size, thickness, width, number of hearts, and have the heart size automatically scale. I'm familiar with OpenSCAD's basic modules and operations, so feel free to use standard OpenSCAD commands to achieve this. I am not using any external libraries.

Could you please generate the OpenSCAD file based on these specifications?

[Assistant]
HeartRing1.scad:
```
//Customizable Heart Ring

//CUSTOMIZER VARIABLES

//(US Ring Sizes)
ring_size = 18.14;//[11.63:0,11.84:0.25,12.04:0.5,12.24:0.75,12.45:1,12.65:1.25,12.85:1.5,13.06:1.75,13.26:2,13.46:2.25,13.67:2.5,13.87:2.75,14.07:3,14.27:3.25,14.48:3.5,14.68:3.75,14.88:4,15.09:4.25,15.29:4.5,15.49:4.75,2215.9:5.25,16.1:5.5,16.31:5.75,16.51:6,16.71:6.25,16.92:6.5,17.12:6.75,17.32:7,17.53:7.25,17.73:7.5,17.93:7.75,18.14:8,18.34:8.25,18.54:8.5,18.75:8.75,18.95:9,19.15:9.25,19.35:9.5,19.56:9.75,19.76:10,19.96:10.25,20.17:10.5,20.37:10.75,20.57:11,20.78:11.25,20.98:11.5,21.18:11.75,21.39:12,21.59:12.25,21.79:12.5,22:12.75,22.2:13,22.4:13.25,22.61:13.5,22.81:13.75,23.01:14,23.22:14.25,23.42:14.5,23.62:14.75,23.83:15,24.03:15.25,24.23:15.5,24.43:15.75,24.64:16]

ring_thickness = 1.6;//[1.6:Normal,2.4:Thick]

ring_width = 8;//[6:12]

num_of_hearts = 9; //[3:11]

//CUSTOMIZER VARIABLES END

module ring() {

difference() {
			cylinder(r=inner_radius+ring_thickness,h=ring_width,$fn = 100,center = true);
			cylinder(r=inner_radius,h=ring_width+1,$fn = 100,center = true);
}

}

module heart (w,h) {
scale (v=[w/171,w/171,1])
translate([0,-78,0])
rotate (a=45, v=[0,0,1])
linear_extrude(height = h,convexity =10, twist =0 )
{
polygon(points=[[0,0],[100,0],[100,50],[50,100],[0,100]], paths=[[0,1,2,3,4]]);
translate([100,50,0])
circle(r=50);
translate([50,100,0])
circle(r=50);
}
}

module circleofhearts ()
{
for (i=[0:num_of_hearts]) {
rotate(a=i*360/num_of_hearts,v=[0,0,1]) {
translate ([0,inner_radius+ring_thickness,0])
rotate(a=90,v=[1,0,0])
heart(heart_size,2*ring_thickness);
}
}

}

//Main Part Here
inner_radius = ring_size/2;
pi = 3.1415;

heart_size = min(ring_width*0.8, 2*inner_radius*pi/num_of_hearts);

translate ([0,0,ring_width/2])
difference () {
ring();
circleofhearts ();
}

```


[User]
Okay, I'm looking to create a 3D printable model of a trefoil knot, but with a specific style. I want the knot to be made up of a series of spheres, like a beaded necklace, that follow the path of the trefoil knot.

Here's what I have in mind:

1.  **Shape:** The basic shape should be a trefoil knot.
2.  **Construction:** Instead of a solid tube, the knot should be formed by a series of connected spheres or balls. The center of each sphere should follow the path of the knot.
3.  **Parameters:** I need to be able to control a few key things with customizable parameters:
    *   `knot_high`: The overall vertical height of the trefoil knot. This will affect the size of the loops.
    *   `ball_radius`: The radius of the spheres making up the knot.
    *   Optionally, perhaps a parameter to control the number of spheres used in the construction, which would affect the smoothness and resolution of the knot.  It can be inferred from `steps`, but perhaps expose it as an additional param.

4.  **Output:** I need the output to be an OpenSCAD file that I can load and render, and be able to customize with these parameters using the OpenSCAD Customizer.

I'm imagining something that looks like the provided example file, `Trefoil_Knot.scad`, but I need it as a parametric file that I can alter. I would be grateful if you could provide an OpenSCAD file that fulfills this design request. If any of the parameters have limits (e.g., they can't be zero or negative) those should be handled and if reasonable defaults exist, those should be provided. The parameters also should be clearly identified within the OpenSCAD Customizer.

[Assistant]
Trefoil_Knot.scad:
```
//Trefoil Knot Balls

//CUSTOMIZER VARIABLES

knot_high = 20; //[10:100]
ball_radius = 10; //[4:50]

//CUSTOMIZER VARIABLES END

module null ()
{
//For stop read as customizer variable
}

l = knot_high/2;
radius = ball_radius;
steps = 45;

translate ([0,0,l+radius])
union () {
for (t = [0:steps])
{
	translate([l*(sin(t/steps*720)+2*sin(2*t/steps*720)),l*(cos(t/steps*720)-2*cos(2*t/steps*720)),-l*sin(3*t/steps*720)])
    sphere(r=radius);
}
}

```


[User]
Okay, I'm looking to get a customizable wall bracket designed in OpenSCAD. I've used something similar before, and I have a good idea of what I want, but I'd like to have something a little more flexible.

Essentially, I need a bracket that can clamp onto a flat object and be mounted to a wall. I've used a design in the past (attached, for reference) that's a good starting point, but I want to make some improvements. Specifically:

1.  **Parametric Clamp Size:** The original design uses a `ClampSize` variable, which is great, but I'd like it to have more flexibility. I'd like to define the thickness of the object being clamped, but also to have a separate parameter that specifies the *gap* between the clamp and the wall. For example, `ClampSize` should become the thickness of the clamped object, and I'd like a new parameter `ClampGap` to define how far the object sticks out from the wall.

2.  **Parametric Width and Height:** I'd like to be able to easily adjust the width of the bracket (how far it extends along the wall) and the overall height of the bracket. The original `Width` parameter only controls how wide the base of the bracket is, but does not effect the height of the bracket. I'd like to be able to change that using `BracketHeight`.

3.  **Rounded Edges:** Instead of sharp edges on the main clamping section, I would like them to be rounded for a more finished look. Instead of `Corner` being a fixed value, it should be the radius of a curve. The entire bracket should have an option to add a rounded edge, using a global parameter called `Round`. The base of the bracket (where it meets the wall) should have no rounding or beveled edges.

4.  **Mounting Holes:** Instead of the single cylinder mounting hole, I'd like to have two mounting holes, countersunk for flat head screws, with the positions also being parametrically defined. This should be controlled by parameters `MountHole_X_Separation`, `MountHole_Y`, `Screw_Head_Diameter` , `Screw_Head_Angle`, and `Screw_Shank_Diameter`.

5.  **Material Thickness Parameter:** I still want to keep a `Thickness` parameter to control the material thickness.

So, in summary, I would like the following parameters:
*   `ClampSize`: Thickness of object being clamped.
*   `ClampGap`: Distance the object is held out from the wall.
*   `BracketWidth`: Width of the bracket, along the wall.
*   `BracketHeight`: Height of the entire bracket.
*   `Round`: Radius of the round edges of the bracket (excluding the base).
*   `Thickness`: Material thickness.
*   `MountHole_X_Separation`: Separation of mounting holes in the x-direction (along the wall).
*   `MountHole_Y`: Distance of mounting holes from the bottom of the bracket (y-direction).
*   `Screw_Head_Diameter`: Diameter of countersunk screw head.
*   `Screw_Head_Angle`: Angle of countersunk screw head.
*   `Screw_Shank_Diameter`: Diameter of screw shank.

I would like to use the BOSL2 library, if that helps. I'm hoping this will create a versatile bracket I can use for lots of different projects.

[Assistant]
Customizable_Wall_Bracket_v0_2.scad:
```
// Customizable Wall Bracket
// (c) 2013 Wouter Robers

// How thick is the thing you want to bracket?
ClampSize=10;

// Material thickness (thicker makes stronger, but less flexible).
Thickness=2;

// Height of the rim in the front of the bracket
RimHeight=3;

// Corner bevel size (bigger bevel gives better strength)
Corner=2;

MakeBracket();

module MakeBracket(){
Width=20;
rotate([0,0,-90]) difference(){
linear_extrude(height = Width)
polygon([[0,0],[0,20+Thickness],[Thickness,20+Thickness],[Thickness,Thickness+Corner],[Thickness+Corner,Thickness],[Thickness+ClampSize-Corner,Thickness],[Thickness+ClampSize,Thickness+Corner],[Thickness+ClampSize,Thickness+RimHeight],[2*Thickness+ClampSize,Thickness+RimHeight],[2*Thickness+ClampSize,Corner],[2*Thickness+ClampSize-Corner,0]]);

# translate([-0.1,10+Thickness,Width/2]) rotate([0,90,0]) cylinder(r1=2.5,r2=5,h=Thickness+0.2);
}
}
```


[User]
Okay, I'm looking to design a parametric spinning top in OpenSCAD, and I've got some specific ideas about its shape and dimensions. I'd like it to be based on a pyramid shape, but with a few key modifications and parameters to make it customizable.

Here's what I have in mind:

**Basic Shape:**

*   The body of the top should be a truncated pyramid, with a flat top surface for easy printing. This flat surface should actually be the base of the pyramid, making it so the design rests on its flattest face.
*   The base of the pyramid should be a regular polygon, and I want to be able to control the number of sides it has.
*   I want to control the diameter of this polygon base.
*   The height of the pyramid needs to be automatically calculated based on a given maximum printing angle, so that the faces aren't too steep for a 3D printer.

**Pole/Spindle:**

*   The spinning top will have a pole extending from the center of the pyramid's base.
*   I want to be able to control the pole's length as a percentage of the overall height of the pyramid.
*   The pole should have a conical shape, getting thinner towards its end, with the top part of the cone capped by a sphere.
*   I want to control the thickness of the pole at its base and at the tip as a percentage of the diameter of the pyramid base. I want the top of the cone to always have a minimum thickness, though the cone should still transition from a thicker base to this minimum.

**Beveling/Chamfering:**

*   I'd like to bevel both the corners and the edges of the pyramid.
*   I want to independently control the size of both of these bevels as a percentage of the pyramid's radius.

**Other Parameters:**

*   I'd like a parameter to control the number of sides of the pyramid base.
*   I need to specify the maximum printing angle.
*   I'd like the option to use a build plate library for preview and placement purposes. I'm using a library called `build_plate.scad` that allows me to specify common printer dimensions or manual dimensions, that might be useful.

**Specifics:**

*   The code I'm using right now calculates the pyramid height based on the printing angle, which I need to maintain. This is to ensure that the pyramid doesn't have too much of an overhang.

*   The pole's conical shape is currently calculated using a few intermediary variables but it does what I want, namely a pole that starts thicker and tapers to a thinner tip, and that does not fall below a minimum radius.

*   It also uses `atan` to position the top correctly, so that it is printed "flat", with a base on the z=0 plane.

**Required Libraries:**

* I'm using a `build_plate.scad` file. I do not need the assistant to include its code.

Essentially, I need a fully parametric version of the current code I have, including the ability to set the diameter, number of sides, pole length/thickness percentages, bevel sizes, and the printing angle limit. I'd like to ensure that the final shape has beveled corners and edges. The critical aspect is having the pyramid rest with a flat base on the print surface (z=0 plane), not resting on the vertex of the pyramid.

[Assistant]
Spin_top_v3.scad:
```
// Created by Carl0sgs
// Derived from Small Calibration Pyramid by LawrenceJohnston (http://www.thingiverse.com/thing:22340)
// Parametric positioning of the peg-top fixed by Obijuan, thank you!
use <utils/build_plate.scad>

diameter = 40; //[10:100]

side_number = 4; //[3:7]

pole_length_percent = 36; //[0:100]

pole_thickness_percent = 12; //[0:100]

corner_bevel_size_percent = 55; //[0:100]
edge_bevel_size_percent = 10; //[0:100]

printing_angle_limit = 55; //[10:80]

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

//for display only, doesn't contribute to final object
build_plate_selector = 3; //[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]

//when Build Plate Selector is set to "manual" this controls the build plate x dimension
build_plate_manual_x = 50; //[50:400]

//when Build Plate Selector is set to "manual" this controls the build plate y dimension
build_plate_manual_y = 50; //[50:400]

build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);

radius = diameter/2;

//y = sqrt(2*radius*radius);
//x = sqrt(y*y-radius*radius/4);

//-- Calculate the height of the proyected polygon (on the z=0 plane)
// This is the distance from the center to a side
h1 = radius * cos (360 / (2*side_number));

// Calculate height of the pyramid, adjusting it to the limit of the max printing angle
// Tedious trigonometry going on here. Check http://mathforum.org/library/drmath/view/55203.html
// The idea is to set the angle between the faces of the pyramid, the radius, and obtain the height.
t = 360/side_number;

R2 = radius*radius;
cost = cos(t);
cosA = cos(180+printing_angle_limit);

height = sqrt( (-R2-R2*cost-R2*cosA-R2*cost*cosA) / (2*(cosA+cost)) );

// Previous failed attempts to do the same thing.
// Left here to remind me not to try to do mathematician's job.
//height = radius/1.6;
//a = sqrt(radius*radius + height*height);
//m = (radius*radius)/height;
//n = (a*a)/height;
//h2 = sqrt(m*n);
//alfa = 360/side_number;
//h2 = radius/tan(printing_angle_limit);

//beta = 45+45-alfa;
//height = radius*tan(beta);

//r2 = radius*cos(alfa-90);
//h2 = radius/tan(printing_angle_limit);

//height = pow(radius,2)/sqrt(pow(h2,2)-pow(radius,2));

//beta2 = (180-alfa)/2;
//beta3 = 2*beta2;
//beta4 = (180-beta3)/2;
//height = 10*abs(cos(-alfa/2+printing_angle_limit));

//-- calculate the angle between the side paralell to the y-axis and the z=0 plane
angle = atan(height/h1);

//-- calculate the rotation angle around z so that there is always a side along the y-axis
rotz = (side_number % 2 == 0) ? 360/(2*side_number) : 0;

// Dimensions of the pole in order to keep 50⁰ angle
pole_length = pole_length_percent*0.01*height*2;
spindle_rtop = pole_thickness_percent*0.01*diameter/4;
spindle_rbase_tmp = spindle_rtop+pole_length*tan(180+angle-(90-printing_angle_limit));
// Avoid generating the pole with a thinner
spindle_rbase = (spindle_rbase_tmp > spindle_rtop) ? spindle_rbase_tmp : spindle_rtop;

module spin_top(height) {
    tinyValue = 0.001;
    translate([0,0,h1*cos(-90+angle)]) // Position on Z=0
    rotate([0,180+angle,0])  //-- Fixed!  :-)
    rotate([0,0, rotz])
    union() {
      intersection() {
        hull() {
          cylinder(r=radius, h=tinyValue, center=false, $fn=side_number);
          translate([0, 0, height]) cylinder(r=tinyValue, h=tinyValue, center=false, $fn=side_number);
        }

        // Intersection to create beveled corners
        // Again, crappy way to create the desired bevels
        rotate([0,0,360/(side_number*2)]) cylinder(r1=tinyValue, r2=radius*4*(1-0.01*corner_bevel_size_percent), h=height*2, center=true, $fn=side_number);
		  cylinder(r1=tinyValue, r2=radius*2*(1-0.01*edge_bevel_size_percent), h=height*2, center=true, $fn=side_number);
      } // End of intersection

      rotate([180,0,0]) {
        cylinder(r1=spindle_rbase, r2=spindle_rtop, h=pole_length, center=false, $fn=60);
        translate([0,0,pole_length]) sphere(r=spindle_rtop, $fn=30);
      }
    } //  End of union
}

spin_top(height);

```


[User]
Okay, I'm looking for help creating a parametric spur gear in OpenSCAD. I have a basic version of what I want, but it needs to be more flexible.

Here's what I need the gear to do, and the parameters I'd like to control:

*   **Number of Teeth:**  I want to be able to specify the number of teeth on the gear.
*   **Shaft Diameter:**  The diameter of the central hole for the shaft needs to be adjustable.
*   **Gear Diameter:** The overall diameter of the gear itself should be a parameter.
*   **Fringe Thickness:**  I need to be able to add optional "fringes" at the top and/or bottom of the gear. The thickness of these fringes should be adjustable.
*   **Gear Height:** I need to set the overall height/thickness of the gear.
*   **Number of Fringes:** I need to control how many fringes the gear has (0, 1, or 2).
*   **Tooth Shape:** I'd like some control over the shape of the teeth themselves, at least by changing the `$fn` value that controls the smoothness/resolution of the circles, and ideally a small number of preset tooth profiles to select from as well.
*   **D-Cut:** I want an option to create a D-shaped shaft hole for keyed shafts instead of just a round hole. I need to be able to enable/disable this.
*   **Gear Tooth Gap:** I'd also like some control over the gear tooth gap to adjust how the gear connects with other gears, such as a multiplier or offset to make the gap bigger or smaller.

I've included my existing OpenSCAD code below for reference, which demonstrates the functionality I'm trying to achieve:

```openscad
// Takuya Yamaguchi

// ignore variable values
//$fn=48;

//custermizing data

// number of tooth
nt =12;

//shaft diameter
sd =8;

//gear diameter
gd=15;

// fringe thickness
ggdt=1.5;

// gear hight
gh=18;

//number of fringe
nf=0;	//[0,1,2]

//tooth shape
$fn=12; //[4,5,6,7,8,12]

//Dcut yes or no
Dcut="yes";//[yes,no]

// ignore variable values
gpr=gd*3.14159/4/nt/(1+3.141592/nt/2);	//gear tooth r
gmr=gpr*1.077; 							// gear gap r
ggd=gd+4; 									// fringe diameter
dh=gh; 										//Dcut hight
off= 360/nt/2;  							// tooth offset

module pgear()

	union(){
	translate([0, 0, 0]) {
		difference() {
         union(){  //gear & fringe
		  translate([0, 0, 0]) cylinder(h = gh, r =gd/2-gpr,$fn=48); //gear
      if (nf == 1){
          translate([0, 0, gh-ggdt])cylinder(h = ggdt, r= ggd/2,$fn=96); //fringe
      				}
      if (nf == 2){
         translate([0, 0, gh-ggdt])cylinder(h = ggdt, r= ggd/2,$fn=96); //fringe
         translate([0, 0, 0])cylinder(h = ggdt, r= ggd/2,$fn=96); //fringe
                   }
                 }
translate([0, 0, -0.5])  // shaft
			cylinder(h = gh+2.5, r= sd/2,$fn=48);

		for (i = [0:(nt-1)]) { 		//gear gap
			echo(360*i/nt, sin(360*i/nt)*(gd/2-gpr), cos(360*i/nt)*(gd/2-gpr));
			translate([sin(360*i/nt)*(gd/2-gpr), cos(360*i/nt)*(gd/2-gpr), ggdt*nf*(nf-1)*0.5])
				rotate([0,0,90*(1-2/$fn)-360*i/nt-($fn-1)*off]) cylinder(h = gh-ggdt*nf, r=gmr);
		                      }
     							}
		for (i = [0:(nt-1)]) {  // Gear tooth
			echo(360*i/nt+off, sin(360*i/nt+off)*(gd/2-gpr), cos(360*i/nt+off)*(gd/2-gpr));
			translate([sin(360*i/nt+off)*(gd/2-gpr), cos(360*i/nt+off)*(gd/2-gpr), 0 ])
				rotate([0,0,90*(1-2/$fn)-360*i/nt-$fn*off]) cylinder(h = gh, r=gpr);
		                      }
                }

	 // Dcut
 if (Dcut== "yes"){
         translate([-(sd/2.1), 0, gh/2]) cube([sd/5,sd*0.8,dh], center = true); // Dcut
       }
}

pgear();
```

It should use standard OpenSCAD primitives and avoid external libraries.

Could you generate the OpenSCAD code for me? Thanks!

[Assistant]
parametric-gear41.scad:
```
// Takuya Yamaguchi

// ignore variable values
//$fn=48;

//custermizing data

// number of tooth
nt =12;

//shaft diameter
sd =8;

//gear diameter
gd=15;

// fringe thickness
ggdt=1.5;

// gear hight
gh=18;

//number of fringe
nf=0;	//[0,1,2]

//tooth shape
$fn=12; //[4,5,6,7,8,12]

//Dcut yes or no
Dcut="yes";//[yes,no]

// ignore variable values
gpr=gd*3.14159/4/nt/(1+3.141592/nt/2);	//gear tooth r
gmr=gpr*1.077; 							// gear gap r
ggd=gd+4; 									// fringe diameter
dh=gh; 										//Dcut hight
off= 360/nt/2;  							// tooth offset

module pgear()

	union(){
	translate([0, 0, 0]) {
		difference() {
         union(){  //gear & fringe
		  translate([0, 0, 0]) cylinder(h = gh, r =gd/2-gpr,$fn=48); //gear
      if (nf == 1){
          translate([0, 0, gh-ggdt])cylinder(h = ggdt, r= ggd/2,$fn=96); //fringe
      				}
      if (nf == 2){
         translate([0, 0, gh-ggdt])cylinder(h = ggdt, r= ggd/2,$fn=96); //fringe
         translate([0, 0, 0])cylinder(h = ggdt, r= ggd/2,$fn=96); //fringe
                   }
                 }
translate([0, 0, -0.5])  // shaft
			cylinder(h = gh+2.5, r= sd/2,$fn=48);

		for (i = [0:(nt-1)]) { 		//gear gap
			echo(360*i/nt, sin(360*i/nt)*(gd/2-gpr), cos(360*i/nt)*(gd/2-gpr));
			translate([sin(360*i/nt)*(gd/2-gpr), cos(360*i/nt)*(gd/2-gpr), ggdt*nf*(nf-1)*0.5])
				rotate([0,0,90*(1-2/$fn)-360*i/nt-($fn-1)*off]) cylinder(h = gh-ggdt*nf, r=gmr);
		                      }
     							}
		for (i = [0:(nt-1)]) {  // Gear tooth
			echo(360*i/nt+off, sin(360*i/nt+off)*(gd/2-gpr), cos(360*i/nt+off)*(gd/2-gpr));
			translate([sin(360*i/nt+off)*(gd/2-gpr), cos(360*i/nt+off)*(gd/2-gpr), 0 ])
				rotate([0,0,90*(1-2/$fn)-360*i/nt-$fn*off]) cylinder(h = gh, r=gpr);
		                      }
                }

	 // Dcut
 if (Dcut== "yes"){
         translate([-(sd/2.1), 0, gh/2]) cube([sd/5,sd*0.8,dh], center = true); // Dcut
       }
}

pgear();

```


[User]
Okay, I'm looking to create a customized pendant using OpenSCAD. I've got a basic idea based on a parametric curve, but I need help making it fully customizable.

Here's what I want:

**Overall Design:** I want a pendant that is based on a 2D curve that's then extruded to give it some depth. The curve should be selectable from a few different options:

*   **Rhodonea Curve:** Defined by `x=cos(a/b*t)*sin(t); y=cos(a/b*t)*cos(t)`
*   **Epicycloid:** Defined by `x=(a+b)*cos(t)-b*cos(((a/b)+1)*t); y=(a+b)*sin(t)-b*sin(((a/b)+1)*t)`
*   **Epitrochoid:** Defined by `x=(a+b)*cos(t)-c*cos(((a/b)+1)*t); y=(a+b)*sin(t)-c*sin(((a/b)+1)*t)`
*   **Hypocycloid:** Defined by `x=(a-b)*cos(t)+b*cos(((a/b)-1)*t); y=(a-b)*sin(t)-b*sin(((a/b)-1)*t)`
*  **Hypotrochoid:** Defined by `x=(a-b)*cos(t)+c*cos(((a/b)-1)*t); y=(a-b)*sin(t)-c*sin(((a/b)-1)*t)`

**Parameters:** I need these parameters to be user-adjustable:

*   `a`:  A numeric parameter used in the curve equations. I'd like to be able to control it between 1 and 50 (inclusive).
*   `b`: Another numeric parameter used in the curve equations, also adjustable between 1 and 50.
*   `c`: A third numeric parameter for epitrochoid and hypotrochoid curves, also adjustable between 1 and 50.
*   `curve`:  A string parameter to select which curve to use from the options listed above ("rhodonea", "epicycloid", "epitrochoid", "hypocycloid", "hypotrochoid").
*  `rose_thickness`:  The thickness of the extruded curve in millimeters, adjustable between 1 and 10.
*   `rose_height`:  The height of the extrusion in millimeters, adjustable between 1 and 50.
*   `rose_radius`: The overall size of the pendant, adjustable between 10 and 100 mm (radius).
*   `ring_adjustment`:  An adjustment for the internal design to fit inside the outer ring, can be between -50 and 50.

**Specific Features:**

*   **Curve Generation:** The curve should be generated by calculating a series of points and then forming a polygon, and then be extruded. I need the ability to adjust the number of points used to generate the polygon.
*   **Thickness:**  The curve should have a specified thickness to make it 3D; this should be added using the normal of the curve at a series of points.
*   **Outer Ring:** There should be a simple circular outer ring surrounding the curve with an adjustable thickness of the outer wall. It also needs to have a connection point/loophole at the top for a chain/cord. This loop needs to be flattened on one side to allow it to print properly on a print bed.
*   **Performance:** I need it to handle a reasonable number of curve iterations without crashing (a thousand is good but if you could make the system more efficient that would be amazing).

**Libraries:**
I would prefer to not use any external libraries if possible, but if it would greatly improve the code I would be willing to use any libraries you deem useful to reduce complexity.

Essentially, I want a fully parametric pendant generator that allows me to play with these different curves and their parameters. Could you create an OpenSCAD file that accomplishes this? I don't need a preview of the render, I'll do that myself.

[Assistant]
curve_pendant.scad:
```
/*
 * Customizable rose pendant
 *
 * Author : Youness Alaoui <kakaroto@kakaroto.homelinux.net>
 * Code for the loophole was taken from wouterglorieux :
 * http://www.thingiverse.com/thing:47020
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License
 */
// preview[view:south, tilt:top]
use <utils/build_plate.scad>

// Parameter 'a' of the curve
a=2; // [1:50]
// Parameter 'b' of the curve
b=1; // [1:50]
// Parameter 'c' of the epitrochoid and hypotrochoid curves
c=5; // [1:50]
// Rhodonea curve : (x=cos(a/b*t)*sin(t); y=cos(a/b*t)*cos(t)
// Epicycloid  : x=(a+b)*cos(t)-b*cos(((a/b)+1)*t); y=(a+b)*sin(t)-b*sin(((a/b)+1)*t)
// Epitrochoid : x=(a+b)*cos(t)-c*cos(((a/b)+1)*t); y=(a+b)*sin(t)-c*sin(((a/b)+1)*t)
// Hypocycloid : x=(a-b)*cos(t)+b*cos(((a/b)-1)*t); y=(a-b)*sin(t)-b*sin(((a/b)-1)*t)
// Hypotrochoid: x=(a-b)*cos(t)+c*cos(((a/b)-1)*t); y=(a-b)*sin(t)-c*sin(((a/b)-1)*t)
// The curve to draw (See instructions for curve equation and parameters)
curve="rhodonea"; // ["rhodonea":Rhodonea curve, "epicycloid":Epicycloid, "epitrochoid":Epitrochoid, "hypocycloid":Hypocycloid, "hypotrochoid":Hypotrochoid]
// Thickness in millimeters of the rose
rose_thickness=1; // [1:10]
// The height in millimeters of the rose
rose_height=5; // [1:50]
// Size in millimeters of the radius of the generated rose
rose_radius=25; // [10:100]
// Adjust internal design size so it fits within the pendant's ring
ring_adjustment=0; // [-50:50]

//Display only, does not contribute to final object
buildPlateType = 0; // [0:Replicator 2, 1:Replicator, 2:Thingomatic]

// Must iterate b*2*pi to draw the whole shape
iterations=360 * b;
 // Normalized tree can't have more than 4000 elements, otherwise openSCAD aborts the rendering
increment= iterations / 1000;
adjustment = ring_adjustment / 10;

k = a / b;
amb = a - b;
apb = a + b;
kp1 = k + 1;
km1 = k - 1;
ab2 = a + b * 2 - adjustment;
abc = a + b + c - adjustment;
amb2 = (a < b ? a - b * 2 : a) - adjustment;
ambc = (a < b ? a - b - c : a - b + c) - adjustment;

function rhodoneax(t) = cos(k * t) * sin (t);
function rhodoneay(t) = cos(k * t) * cos (t);
function epicycloidx(t) = (apb * cos(t) - b * cos(kp1 * t)) / ab2;
function epicycloidy(t) = (apb * sin(t) - b * sin(kp1 * t)) / ab2;
function epitrochoidx(t) = (apb * cos(t) - c * cos(kp1 * t)) / abc;
function epitrochoidy(t) = (apb * sin(t) - c * sin(kp1 * t)) / abc;
function hypocycloidx(t) = (amb * cos(t) + b * cos(km1 * t)) / amb2;
function hypocycloidy(t) = (amb * sin(t) - b * sin(km1 * t)) / amb2;
function hypotrochoidx(t) = (amb * cos(t) + c * cos(km1 * t)) / ambc;
function hypotrochoidy(t) = (amb * sin(t) - c * sin(km1 * t)) / ambc;

function x(t) = ((curve == "rhodonea") ? rhodoneax(t) :
                 (curve == "epicycloid") ? epicycloidx(t) :
                 (curve == "epitrochoid") ? epitrochoidx(t) :
                 (curve == "hypocycloid") ? hypocycloidx(t) :
                 (curve == "hypotrochoid") ? hypotrochoidx(t) :
                 rhodoneax(t));
function y(t) = ((curve == "rhodonea") ? rhodoneay(t) :
                 (curve == "epicycloid") ? epicycloidy(t) :
                 (curve == "epitrochoid") ? epitrochoidy(t) :
                 (curve == "hypocycloid") ? hypocycloidy(t) :
                 (curve == "hypotrochoid") ? hypotrochoidy(t) :
                 rhodoneay(t));

// Calculate the normal vector of two points on the curve.
function normx(y1, y2) = y1 - y2;
function normy(x1, x2) = x2 - x1;
function norm(x, y) = sqrt(pow(x, 2) + pow(y, 2));
function nx(x, normx, norm, thickness) = x + (normx / norm * thickness);
function ny(y, normy, norm, thickness) = y + (normy / norm * thickness);

// Draw the curve using a polygon of 10 points to lower the number of objects
// used. Use the normal vector from 2 points to shift the points by the right
// amount of thickness to make the curve a 3D form.
module draw_curve(t) {
  // Calculate thickness once, as it will depend on the scaling later
  assign(thickness = rose_thickness / rose_radius)
    // Calculate the next 10 iterations
    assign(t2 = t + increment)
    assign(t3 = t2 + increment)
    assign(t4 = t3 + increment)
    assign(t5 = t4 + increment)
    assign(t6 = t5 + increment)
    assign(t7 = t6 + increment)
    assign(t8 = t7 + increment)
    assign(t9 = t8 + increment)
    assign(t10 = t9 + increment)
    assign(t11 = t10 + increment)
    assign(t12 = t11 + increment)
    // Cache the points (x, y)
    assign(x0 = x(t))
    assign(y0 = y(t))
    assign(x1 = x(t2))
    assign(y1 = y(t2))
    // Pre calculate the normal vector from two points
    assign(normx0 = normx(y0, y1))
    assign(normy0 = normy(x0, x1))
    assign(norm0 = norm(normx0, normy0))
    // Calculate the points of the closing segment by shifting the point
    // depending on the normal vector, by the thickness we want
    assign(nx0 = nx(x0, normx0, norm0, thickness))
    assign(ny0 = ny(y0, normy0, norm0, thickness))
    assign(x2 = x(t3))
    assign(y2 = y(t3))
    assign(normx1 = normx(y1, y2))
    assign(normy1 = normy(x1, x2))
    assign(norm1 = norm(normx1, normy1))
    assign(nx1 = nx(x1, normx1, norm1, thickness))
    assign(ny1 = ny(y1, normy1, norm1, thickness))
    assign(x3 = x(t4))
    assign(y3 = y(t4))
    assign(normx2 = normx(y2, y3))
    assign(normy2 = normy(x2, x3))
    assign(norm2 = norm(normx2, normy2))
    assign(nx2 = nx(x2, normx2, norm2, thickness))
    assign(ny2 = ny(y2, normy2, norm2, thickness))
    assign(x4 = x(t5))
    assign(y4 = y(t5))
    assign(normx3 = normx(y3, y4))
    assign(normy3 = normy(x3, x4))
    assign(norm3 = norm(normx3, normy3))
    assign(nx3 = nx(x3, normx3, norm3, thickness))
    assign(ny3 = ny(y3, normy3, norm3, thickness))
    assign(x5 = x(t6))
    assign(y5 = y(t6))
    assign(normx4 = normx(y4, y5))
    assign(normy4 = normy(x4, x5))
    assign(norm4 = norm(normx4, normy4))
    assign(nx4 = nx(x4, normx4, norm4, thickness))
    assign(ny4 = ny(y4, normy4, norm4, thickness))
    assign(x6 = x(t7))
    assign(y6 = y(t7))
    assign(normx5 = normx(y5, y6))
    assign(normy5 = normy(x5, x6))
    assign(norm5 = norm(normx5, normy5))
    assign(nx5 = nx(x5, normx5, norm5, thickness))
    assign(ny5 = ny(y5, normy5, norm5, thickness))
    assign(x7 = x(t8))
    assign(y7 = y(t8))
    assign(normx6 = normx(y6, y7))
    assign(normy6 = normy(x6, x7))
    assign(norm6 = norm(normx6, normy6))
    assign(nx6 = nx(x6, normx6, norm6, thickness))
    assign(ny6 = ny(y6, normy6, norm6, thickness))
    assign(x8 = x(t9))
    assign(y8 = y(t9))
    assign(normx7 = normx(y7, y8))
    assign(normy7 = normy(x7, x8))
    assign(norm7 = norm(normx7, normy7))
    assign(nx7 = nx(x7, normx7, norm7, thickness))
    assign(ny7 = ny(y7, normy7, norm7, thickness))
    assign(x9 = x(t10))
    assign(y9 = y(t10))
    assign(normx8 = normx(y8, y9))
    assign(normy8 = normy(x8, x9))
    assign(norm8 = norm(normx8, normy8))
    assign(nx8 = nx(x8, normx8, norm8, thickness))
    assign(ny8 = ny(y8, normy8, norm8, thickness))
    assign(x10 = x(t11))
    assign(y10 = y(t11))
    assign(normx9 = normx(y9, y10))
    assign(normy9 = normy(x9, x10))
    assign(norm9 = norm(normx9, normy9))
    assign(nx9 = nx(x9, normx9, norm9, thickness))
    assign(ny9 = ny(y9, normy9, norm9, thickness))
    assign(x11 = x(t12))
    assign(y11 = y(t12))
    assign(normx10 = normx(y10, y11))
    assign(normy10 = normy(x10, x11))
    assign(norm10 = norm(normx10, normy10))
    assign(nx10 = nx(x10, normx10, norm10, thickness))
    assign(ny10 = ny(y10, normy10, norm10, thickness))
    linear_extrude(height=rose_height / rose_radius, convexity=10, slices=100)
    {
      polygon(points=[[x0, y0], [x1, y1], [x2, y2],
                      [x3, y3], [x4, y4], [x5, y5],
                      [x6, y6], [x7, y7], [x8, y8],
                      [x9, y9], [x10, y10],
                      [nx10, ny10], [nx9, ny9], [nx8, ny8],
                      [nx7, ny7], [nx6, ny6], [nx5, ny5],
                      [nx4, ny4], [nx3, ny3], [nx2, ny2],
                      [nx1, ny1], [nx0, ny0]],
              paths=[[0, 1, 2, 3,
                      4, 5, 6, 7,
                      8, 9, 10, 11,
                      12, 13, 14, 15,
                      16, 17, 18, 19,
                      20, 21, 0]]);
    }
}

module main() {
  scale(rose_radius)
    union()
    {
      for (t = [0:increment*10:iterations]) {
        draw_curve(t);
      }
    }
}

main();

linear_extrude(height=rose_height, convexity = 10, $fn=60)
difference() {
  circle(r = rose_radius + 2 * rose_thickness, $fn=60);
  circle(r = rose_radius + rose_thickness, $fn=60);
}

//loophole for chain
difference() {
  translate([0,rose_radius + rose_thickness * 2,0]) rotate([0,90,0]) scale([1,1.5,2]) translate([-3, 3, 0]) rotate_extrude(convexity = 10, , $fn=60) translate([3, 0, 0]) circle(r = 1, $fn=60);
  // Make it flat on the build plate
  translate([-5, rose_radius + rose_thickness * 2, -1]) cube([10, 10, 1]);
}

build_plate(buildPlateType, 0, 0);

```


[User]
Okay, I need a customizable pipe holder designed in OpenSCAD. I have a basic design in mind, but I'd like it to be fully parametric so I can adjust it for different pipe sizes and mounting situations.

Here's a breakdown of the features I need:

**Core Structure:**

*   **Cylinder:** The main body of the pipe holder should be a hollow cylinder. I need to be able to control the following:
    *   `ind`: Inner diameter of the cylinder.
    *   `od`: Outer diameter of the cylinder.
    *   `ch`: Height (or length) of the cylinder.

*   **Fringe:** There should be a flange or fringe at the base of the cylinder, which provides a wider base for mounting. I need to control:
    *   `fd`: Diameter of the fringe.
    *   `fth`: Thickness of the fringe.

**Mounting Holes (Screws):**

*   **Tapered Holes:** There should be countersunk holes on the fringe for mounting screws. These holes will have a tapered shape, with a larger diameter at the top (for the screw head) and a smaller diameter at the bottom. I need to control:
    *   `sth`: Radius of the top (larger end) of the tapered screw hole.
    *   `shr`: Radius of the bottom (smaller end) of the tapered screw hole, which will continue through the fringe as a straight hole.
    *  `tdp`: Taper depth of the countersunk screw hole.
    *   `ns`: Number of mounting holes.
    *   `off`: Rotation offset of the main screw holes.

**Other Features:**

*  The cylinder should extend a short distance below the fringe.
*   All the holes should be properly aligned with the main cylinder and the fringe.
*   The number of mounting holes should be easily configurable.
*   I would like to include a preview of the mounting hole positions in the console, including their x and y values.

**Parametric Requirements:**

I need all of the dimensions listed above to be easily adjustable parameters within the OpenSCAD code. This will allow me to quickly create different sized holders without needing to manually edit the code each time. I would like all the values to be defined at the top of the file.

I'm not using any libraries beyond standard OpenSCAD for this, so please don't assume any libraries are available.

[Assistant]
customizable-pipeholder3.scad:
```

module pipeholder()
define();

//custermizing data

//screw taper hole r
sth=40;

//screw hole r
shr=18;

//number of screws
ns =3;  //[2,3,4]

//inner_diameter
ind=280;

//outer diameter
od=343;

//fringe diameter
fd=600;

//fringe thickness
fth=60;

//cylinder hight
ch=340;

//taper depth
tdp=fth*2/3;

// screw hole offset
off= 360/ns;

//custermizing data end

//ignore valuable
$fn=48;
	translate([0, 0, 0]) {
		difference() {
                union(){                                                      //cylinder & fringe
		  translate([0, 0, fth]) cylinder(h = ch-fth, r =od/2);               //cylinder
          translate([0, 0, 00])cylinder(h = fth, r= fd/2); //fringe
                       }
		for (i = [0:(ns-1)]) { 		                                        //screw taper hole
			echo(360*i/ns, sin(360*i/ns)*(od/2+70), cos(360*i/ns)*(od/2+70));
			translate([sin(360*i/ns)*(od/2+70), cos(360*i/ns)*(od/2+70), fth/2])
				cylinder(h =tdp, r2=sth,r1=shr);
		                      }
		translate([0, 0, 50])                                                 // shaft
			cylinder(h = ch-fth+25, r=ind/2);
		       for (i = [0:(ns-1)]) {                                         // screw hole
			echo(360*i/ns+off, sin(360*i/ns+off)*(od/2+70), cos(360*i/ns+off)*(od/2+70));
			translate([sin(360*i/ns+off)*(od/2+70), cos(360*i/ns+off)*(od/2+70), -1 ])
				cylinder(h=(fth-tdp)+20,r=shr);
		                             }
                     }
                              }
pipeholder();

```


[User]
Okay, I'm looking to create a parametric connector that smoothly transitions between a square tube and a round tube. I've seen examples that use superellipses to achieve this, and that seems like a good approach. I'd like the OpenSCAD code to be flexible enough to adjust the key dimensions.

Here's a breakdown of what I need:

*   **Overall Structure:** The connector will have three sections: a square tube section, a transition section, and a round tube section.

*   **Square Tube Section:**
    *   **`square_side`:**  A parameter to control the length of the side of the square.
    *   **`square_length`:** A parameter to control the length of the square tube section.

*   **Round Tube Section:**
    *   **`round_diameter`:** A parameter to control the diameter of the round tube.
    *   **`round_length`:** A parameter to control the length of the round tube section.

*   **Transition Section:**
    *   **`transition_length`:** A parameter to control the length of the transition between the square and round sections.
    *   The transition should smoothly morph from a square to a circle using a superellipse.
    *   I want a parameter `layers` to determine how many steps or slices to create along the length of this transition. More layers will be smoother but might be slower to render.

*   **Wall Thickness:**
    *   **`thickness`:** A parameter to control the wall thickness of the entire connector.

*   **Inside/Outside Dimensions:**
    *   **`inside`:** A parameter with two states: 1 for "inside" dimensioning and 2 for "outside" dimensioning. When set to 1, the provided square_side and round_diameter parameters will define the inside dimensions. When set to 2, the given parameters should define the outside dimensions. In either case the wall thickness is applied accordingly.

*   **Important Feature:** I want the superellipse to be the primary shaping function.

I'd like the code to be organized clearly with well-defined parameters at the top. I'm hoping that the code will be reasonably efficient.

I do not need any additional libraries for this design.

[Assistant]
square_round_connector.scad:
```
// inside  or outside sizing
inside= 2;  // [1:inside, 2:outside]

// wall thickness
thickness = 2 ;

// length of side of square section
square_side = 15;  //

// length of square section
square_length = 10; //

// length of transition section
transition_length = 20; //

// diameter of round section
round_diameter = 20;  //

// length of round section
round_length = 10;

// no of steps in the transition  - large is quite slow
layers= 10;

// --------------- functions and modules
function normal (p1,p2) = [ p1[1] - p2[1], p2[0] - p1[0] ] ;
function length(p)  =  sqrt(pow(p[0],2) + pow(p[1],2));
function unit_normal(p1,p2) = normal(p1,p2) / length(normal(p1,p2));
function interpolate(a, b, ratio) = a + (b - a) * ratio;

function superellipse (R, p, e, theta) =
      R * [pow(abs(cos(theta)),2/p) * sign(cos(theta)),
           e * pow(abs(sin(theta)),2/p) * sign(sin(theta))
          ] ;

module superellipse_curve (R, p, e=1, thickness=1, sweep=360, n=50) {
      assign(dth = sweep/n)
        for (i = [0:n-1] )
          assign (p1 = superellipse(R,p,e,dth*i),
                  p2 = superellipse(R,p,e,dth*(i+1))
                  )
          assign (nv =  thickness * unit_normal(p1,p2)  )
            polygon(
                  [p1,p2,p2+nv,p1+nv] );
}

module tube(r1, r2, length, p1, p2, thickness, steps) {
//
     for (i=[0:steps-1])
        assign (ratio = i /steps)
        assign (radius = interpolate(r1, r2, ratio),
                    p = interpolate(p1,p2,ratio),
                    l = interpolate(0, length, ratio)
                   )
        translate([0, 0, l])
           linear_extrude(height= length /steps)
               superellipse_curve(radius,p,1,thickness);
}

square_r= square_side * sin(45)  + (inside==1 ? thickness : 0);
round_r= round_diameter /2 + (inside==1 ? thickness : 0) ;

echo (square_r, round_r);

// make it
$fa=0.01; $fs=2;
union() {
          // square section
         tube(square_r,square_r, square_length,1,1,thickness,1);
         // transition
         translate([0,0,square_length])
                tube(square_r,round_r,transition_length,1,2,thickness,layers);
          // round section
          translate([0,0,square_length + transition_length])
                tube(round_r,round_r,round_length,2,2,thickness,1);
   }

```