[User]
I'd like to create a customizable schoolbag keychain using OpenSCAD. I have some basic ideas for the shape and features, and I'd like it to be parametric so I can easily adjust the dimensions.

The core of the design is a rectangular bag body with rounded edges. I'd like to be able to adjust:

*   `h_bag`: the height of the bag (vertical dimension)
*   `l_bag`: the length of the bag (depth dimension)
*   `w_bag`: the width of the bag (horizontal dimension)

There should be a front flap that extends down a bit from the top of the main body. This flap should also have rounded edges and its height should be tied to `h_bag` but also adjustable, maybe based on a percentage. Let’s call the flap height `h_flap`. Additionally, it should have a thickness `e_flap` tied to `w_bag`.

I want to add a handle on the top that is created using a rotational extrusion. The handle’s basic shape should be controlled by `r_handle` and a smaller circle on the handle’s end called `r_handle2`. There also needs to be an overall height of the handle, `h_handle`. Finally there's a `d_handle` parameter that should also be driven from `h_handle`.

I’d also like two small pockets on the front of the bag, each with rounded edges. The pocket length, `l_pocket`, should be a fraction of the `l_bag` and their height should match the flap’s, `h_flap`.

The rounding of the edges on the main bag, flap, and pockets should be controlled by a single variable `r_round`.

I want to include a few cutouts to make the bag look a little more detailed: a thin inset on the top, a thin cutout on the bottom, and a thin curved inset on the back to suggest that there’s depth to the bag.

Finally, I’d like the whole design to be parametric and easy to modify.

Could you generate the OpenSCAD code for this? I would prefer that it uses only built-in modules from OpenSCAD itself and does not rely on any external libraries like MCAD or BOSL. I'm not sure about best practices for structuring OpenSCAD projects, so please create a single file that defines the parameters, modules, and instantiates the model.

[Assistant]
customizable_schoolbag.scad:
```
// bag

//Move the height.
h_bag = 35; //[20:50]

//Move the lenght.
l_bag = 30; // [20:50]

//Move the width.
w_bag = 12; // [10:30]

l_pocket = l_bag/4;

r_round   = w_bag/6;
e_flap    = w_bag/8;
r_handle  = l_bag/5.5;
r_handle2 = r_handle/3.5;
h_handle  = r_handle+r_handle2;
w_handle  = r_handle2*2;
d_handle  = 2*(h_handle)/3;
h_flap    = 40*(h_bag-h_handle-w_bag/2)/100;

$fn=100;

module support()
{
	cube([w_handle,h_handle/2,+l_bag/2-r_handle-r_handle2]);
}

module handle()
{
	difference()
	{
		rotate_extrude(convexity = 10)
		translate([r_handle, 0, 0])
		circle(r = r_handle2, $fn =100);
		translate([ -(r_handle+r_handle2),-(r_handle+r_handle2), -r_handle2])cube([(r_handle+r_handle2)*2,(r_handle+r_handle2),r_handle2*2]);
	}
}

module pocket(l,h,r,e)
{
	hull()
	{
		translate(v=[-l+r,0,0])cube([l,h-r,e]);
		cylinder(r=r,h=e);
	   translate(v=[-l+r*2,0,0])cylinder(r=r,h=e);
	}
}

module pocket_h(l,h,r,e)
{
	hull()
	{
		translate(v=[-l+r,0])cube([l,h-r,e]);
		translate(v=[0,h,0])cylinder(r=r,h=e);
	   translate(v=[-l+r*2,h,0])cylinder(r=r,h=e);
	}
}

module front_flap()
{
	hull()
	{
		translate(v=[-l_bag+r_round,0,0])cube([l_bag,h_flap-r_round,e_flap]);
		cylinder(r=r_round,h=e_flap);
	   translate(v=[-l_bag+r_round*2,0,0])cylinder(r=r_round,h=e_flap);
	}
}

module flap()
{
	translate(v=[-r_round+w_bag/2,h_bag-r_round-h_handle-w_bag/2])color("yellow")

			{
             intersection()
             {
             	 translate(v=[-w_bag,0])square([w_bag*2,w_bag]);
				    difference()
				    {
				    	circle(r=w_bag/2);
				      circle(r=w_bag/2-e_flap);
				    }
				 }
			}
}

module section()
{
	difference()
	{
		union()
		{
			hull()
			{
				translate(v=[-r_round,h_bag-r_round-h_handle-w_bag/2])square([w_bag  - e_flap,0.1]);
				color("green")square([w_bag - 2*r_round - e_flap,
			                       h_bag-r_round-h_handle-w_bag/2]);
				circle(r=r_round);
				translate(v=[w_bag-2*r_round-e_flap,0])circle(r=r_round);
			}
         flap();
		}

		// inside
		translate(v=[-r_round+w_bag/2,0.1+h_bag-r_round-h_handle-w_bag/2])scale([1,0.32])circle(r=w_bag/2-e_flap);

		// below
		translate(v=[-r_round+(w_bag-e_flap)/2,-r_round-.68])color("yellow")scale([1.1,0.38])circle(r=(w_bag-e_flap-r_round)/2-1);

		// behind
		translate(v=[-r_round*1.2,(h_bag-r_round-h_handle-w_bag/2)/2])color("yellow")scale([0.1,1.2])circle(r=(h_bag-r_round-h_handle-w_bag/2-e_flap)/2);

	}
}

///////////////////////////////////////////////////////////////////////////
rotate(90,[1,0,0])
{
linear_extrude(height = l_bag)
section();

translate(v=[w_bag-r_round-e_flap,-h_flap+h_bag-h_handle-w_bag/2,+r_round])rotate(90,[0,1,0])pocket(l=l_bag,h=h_flap,r=r_round,e=e_flap);

//pockets
translate(v=[w_bag-r_round-e_flap,-h_flap*2+h_bag-h_handle-w_bag/2,
r_round+(l_bag-l_pocket*2)/4])
color("yellow")rotate(90,[0,1,0])pocket(l=l_pocket,h=h_flap,r=r_round,e=e_flap*0.75);

translate(v=[w_bag-r_round-e_flap,-h_flap*2+h_bag-h_handle-w_bag/2,
r_round+l_bag-l_pocket-(l_bag-l_pocket*2)/4])
color("yellow")rotate(90,[0,1,0])pocket(l=l_pocket,h=h_flap,r=r_round,e=e_flap*0.75);

// handle
translate(v=[-r_round+w_bag/2,h_bag-r_round-h_handle-e_flap/2,+l_bag/2])
rotate(90,[0,1,0])handle();

// support
//translate(v=[w_bag/2-r_round-w_handle/2,h_bag-r_round-h_handle+0.5,0])support();

}
```


[User]
I'm looking to create a customizable spool holder for the Makerbit Mini, similar to the design I've seen at http://stbib-koeln.de. I need it to have a few key features and be fully parametric.

Here's the basic idea:

*   **Main Structure:** The holder needs a "clip" section that attaches to the printer, an "axis" for the spool to sit on, and a "foot" at the end of the axis to prevent the spool from sliding off. This is generally similar to the included code, though I'd like it to be generated from scratch.
*   **Clip:** The clip part should be a simple rectangular shape with two identical parts on either side of where it would be attached to the printer.
*   **Axis:** The axis will be a cylinder with a configurable diameter and length.
*   **Foot:** The foot needs to be at the end of the axis, but I want to have some control over its design so it can be customized, which the current design lacks. I'd like it to have a larger diameter than the axis, but the profile should be configurable so it can look different. It should be a "hull" to blend smoothly, but I need some control over this.
*  **Endstop:** It should have an integrated endstop to prevent the spool from sliding off the axis, with a configurable endstop profile.

Specifically, I'd like to be able to adjust these parameters:

*   **`clip_width`**: The width of the clip (horizontal dimension).
*   **`clip_depth`**: The depth of the clip.
*    **`clip_height`**: The height of the clip.
*    **`clip_thickness`**: The thickness of the clip.
*   **`axis_diameter`**: The diameter of the cylindrical axis.
*   **`axis_length`**: The length of the cylindrical axis.
*   **`foot_diameter`**: The diameter of the "foot". This will be larger than the axis diameter.
*  **`foot_height`**: The height of the "foot".
*  **`foot_profile_offset`**: How far beyond the axis the "foot" profile goes.
*    **`endstop_height`**: The height of the endstop.
*    **`endstop_depth`**: The depth of the endstop.
*    **`endstop_width`**: The width of the endstop.
* **`endstop_offset`**: The distance of the endstop from the foot.

I'd like this to be done in OpenSCAD, and I would like the resulting code to be well-commented and use modules. I'd like to avoid any library dependencies if possible to keep things simple. I want all files included with this response.

[Assistant]
mini_spool_holder_endstop_customizer.scad:
```
/* [Global] */
diameter = 30; // [10:38]
length = 110; //[10:200]
mini_spool_holder();

module mini_spool_holder()
{
	rotate([0,-90,0])
	{
		union()
		{
			// clip
			translate([0,0,2.5])
			{
				cube([38.5,90,3.125]);
			}
			translate([0,0,-3.125])
			{
				cube([38.5,90,3.125]);
			}
			cube([38.5,18.5,2.5]);

			// axis
			translate([(diameter/2),90-(diameter/2),5.5])
			{
				cylinder(r=diameter/2, h=length);
			}

			// foot
			translate([(diameter/2),90-(diameter/2),length+5.5])
			{
				hull()
				{
					cylinder(r=diameter/2, h=3);
					translate([0,-10,0])
					{
						cylinder(r=diameter/2, h=3);
					}
				}
			}
		}
	}
}

```


[User]
Hi! I'm looking to create a parametric shoe rack design in OpenSCAD. I'd like it to be customizable across a few different dimensions.

The basic concept is a rack that holds a steel or wooden rod, intended to sit a bit off the floor – say, 20-30cm. The main support structure will have two 'arms' that cradle the rod. The arms will be angled upwards at something like 20 degrees.

Here's a breakdown of what I'm envisioning for parameters:

*   **`fatness`:** This controls the thickness of the support pieces as they sit on the print platform, probably in the 10-20mm range.
*   **`length_upper`:** This sets the length of the shorter "arm" of the support, maybe 20-40mm.
*   **`length_lower`:** This sets the length of the longer "arm" of the support, say, 85-120mm.
*   **`wall_thickness`:** This parameter controls the thickness of the supporting structure, roughly 3-12mm.
*   **`rack_height`:** The overall height of the vertical supporting piece, in the 50-60mm range.
*   **`rack_angle`:** This adjusts the angle of the arms, from 0 (flat) up to maybe 45 degrees.
*   **`rod_d`:** This is the diameter of the rod the rack will hold, probably between 6-20mm, but I expect 8mm to be the most common.
*   **`closure`:** This parameter allows for the rod to be optionally 'closed' off by adding a small tab on the side, either on the left or the right side or none.
*   **`sroub_r`:** The radius of screw holes. I expect to use 5-8 mm diameter screws.
*   **`sroub_h`:** The diameter of the screw head, maybe between 10-15mm.
*   **`screw_type`:** Select either "recessed" or "flat" for screw heads.

I'm thinking it would be great to include a mounting hole for screws so I can attach the rack to the wall or some surface. A recessed screw hole option would be ideal.

I'm hoping you can generate the necessary OpenSCAD code for this, with all the parameters adjustable. I'm not using any special libraries, so just vanilla OpenSCAD should work. Let me know if you have any questions! Thanks!

[Assistant]
rack_customizable.scad:
```
/* [Global] */

// preview[view:north west, tilt:top diagonal]

// Smoothness
$fn = 36;		// [92:Ultimate,36:Smooth,12:Edgy,6:Hexagonal,5:Pentagonal]

/* [Object look and feel] */

// Height of the object on the print platform
fatness = 18; // [10:300]

// Length of the top holder
length_upper =  30; // [20:Mini,30:Standard,40:Large]

// Length of the bottom holder
length_lower = 100; // [85:Mini,100:Standard,120:Large]

// Wall thickness
wall_thickness = 6; // [3:Slim,6:Standard,12:Heavy]

// Height of the object
rack_height = 55; // [50:Mini,55:Standard,60:Large]

// Angle of the holders
rack_angle = 20; // [0:Flat,15:Low,20:Normal,30:Steep,45:Wrapped]

/* [Rod parameters] */

// Rod diameter (more than 10 may be too heavy)
rod_d    =   8; // [6,7,8,9,10,11,12,14,16,18,20]

// Hole closure
closure  = "none"; // [none,left,right]

/* [Screw sizing] */

// Screw diameter
sroub_r  =   5; // [5,6,7,8]

// Screw head diameter
sroub_h  =  10; // [10,11,12,13,15]

// Screw type
screw_type = "recessed"; // [recessed,flat]

/* [Hidden] */
// Screw length
sroub_l  =  30;
fudge    =   0.3;

odstup = (rack_height / 5 > wall_thickness) ? (rack_height / 5) : (wall_thickness);

module zaslepka() {
  color("orange") cylinder(r = rod_d / 2 + fudge, h = fatness / 3);
}

module zaslepky() {
  rotate([0, 0, rack_angle]) translate([rack_height - wall_thickness / 2, wall_thickness / 2 + length_lower, 0])
    zaslepka();
  rotate([0, 0, rack_angle]) translate([wall_thickness / 2, wall_thickness / 2 + length_upper, 0])
    zaslepka();
}

module dira_tycky() {
  translate([0, 0, -fudge])
    cylinder(r = rod_d / 2 + fudge / 2, h = fatness + 2*fudge);
}

module tycka() {
  difference() {
    cylinder(r = (rod_d + wall_thickness) / 2, h = fatness);
    dira_tycky();
  }
}

module rack(closed) {
  translate([wall_thickness / 2, 0, 0])
    cube([rack_height - wall_thickness, wall_thickness, fatness]);

  difference() {
    hull() {
      translate([wall_thickness / 2, wall_thickness / 2, 0])
        cylinder(r=wall_thickness / 2, h = fatness);
      rotate([0, 0, rack_angle]) translate([wall_thickness / 2, wall_thickness / 2 + length_upper, 0])
        tycka();
    }
    rotate([0, 0, rack_angle]) translate([wall_thickness / 2, wall_thickness / 2 + length_upper, 0])
      dira_tycky();
  }

  difference() {
    hull() {
      translate([rack_height - wall_thickness / 2, wall_thickness / 2, 0])
        cylinder(r=wall_thickness / 2, h = fatness);
      rotate([0, 0, rack_angle]) translate([rack_height - wall_thickness / 2, wall_thickness / 2 + length_lower, 0])
        tycka();
     }
    rotate([0, 0, rack_angle]) translate([rack_height - wall_thickness / 2, wall_thickness / 2 + length_lower, 0])
      dira_tycky();
  }

  if (closed == "right") {
    zaslepky();
  }
  if (closed == "left") {
    translate([0, 0, fatness / 3 * 2]) zaslepky();
  }
}

module hole() {
  rotate([-90, 0, 0]) {
    cylinder(r = sroub_r / 2, h = sroub_l);
    if (screw_type == "recessed") {
      translate([0, 0, sroub_l / 10 * 9])
        cylinder(r1 = sroub_r / 2, r2 = sroub_h / 2, h = sroub_l / 10);
      translate([0, 0, sroub_l])
        cylinder(r = sroub_h / 2, h = 1);
    } else {
      translate([0, 0, sroub_l / 10 * 9])
        cylinder(r = sroub_h / 2, h = sroub_l / 3);
    }
  }
}

module rack_dira(closed = closure) {
  difference() {
  rack(closed);
    # translate([odstup, wall_thickness + fudge - sroub_l, fatness / 2])
      hole();
  }
}

module anotherone() {
  translate([0, 0, 200])
    rack_dira(closed = "right");
}

module centerone() {
  translate([0, 0, 100 - fatness / 2])
    rack_dira(closed = "none");
}

module poles() {
  rotate([0, 0, rack_angle]) translate([wall_thickness / 2, wall_thickness / 2 + length_upper, fatness / 3]) cylinder(r=rod_d / 2, h = 200 + fatness - fatness / 3 * 2);
  rotate([0, 0, rack_angle]) translate([rack_height - wall_thickness / 2, wall_thickness / 2 + length_lower, fatness / 3]) cylinder(r=rod_d / 2, h = 200 + fatness - fatness / 3 * 2);
}

rack_dira();

```


[User]
I need a parametric OpenSCAD design for a door handle clip that can hold a small, flat object against the handle. The clip should essentially be a slightly oversized cylinder with a slit cut out of it, and a flat section where a logo can be placed.

Here's a breakdown of the requirements:

*   **Handle Diameter:** The design should be parametric, so I can specify the diameter of the door handle it will clip onto.
*   **Clip Shape:** The base shape of the clip should be a cylinder with a slightly larger radius than the handle, so it can grip onto the handle. The cylinder needs to have a vertical slit cut into it to allow it to flex open.
*   **Logo Platform:** A flat platform should extend from the side of the cylinder. This platform should have a recessed surface where I can place a logo. I'd also like to be able to adjust the depth of this recess.
*   **Flexibility:** The slit cut into the cylinder should be customizable to control how flexible the clip is.
*   **Logo Inclusion:** I plan to use a 2D image file for the logo (it will be black and white and will be converted to a surface by the OpenSCAD `surface` command). The design needs to be able to handle this and allow for scaling of the logo.
*   **Parameterization:** I want as much control as possible over the size and position of the various components, so having parameters for things like the width, depth, and position of the platform, the size of the slit, and the radius of the cylinder are essential.

I don't have any specific requirements for tolerance, as I'll be adjusting the parameters to get the fit right, but it should at least be a usable design for a 3d print.

I'm hoping to have the final design be a single OpenSCAD file.

[Assistant]
door_handle_hold.scad:
```
// diameter of door handle in mm
handle_diameter = 20;
logo_image_file = "wi1logo.dat"; // [image_surface:44x26]
radius = handle_diameter / 2;

rotate([0,-90,0]) union() {
translate([0,-2.25,radius+1]) cube(size = [20,2,20]);

translate([1,-2.2,radius+3]) rotate([90,0,0])

    scale([0.4, 0.4, 1]) surface(file = logo_image_file, invert = false);

translate([0,0.25,radius+1]) cube(size = [20,2,20]);

rotate([0,90,0]) {

    difference() {
        cylinder(h=20, r=radius+2, $fn=80);
        union() {
            translate([0,0,-3]) cylinder(h=40, r=radius, $fn=80);
            translate([0,-5,-10]) cube([50,10,100]);
        }
    }
}

}
```


[User]
I need a customizable tray designed in OpenSCAD. I'm looking for something that can hold cylindrical objects upright, kind of like the code I'm attaching (but please generate the code from scratch - I don't want you to modify mine). My main use case is holding small cylindrical items of varying sizes - think test tubes, small bottles, and the like.

I need the following parameters to be easily adjustable:

*   **Hole Radius:** The radius of the circular holes that will hold the items. I'd like to specify this in millimeters.
*   **Hole Spacing:** The distance between the edges of adjacent holes. Again, this should be in millimeters.
*   **Rows:** The number of rows of holes in the tray.
*   **Columns:** The number of columns of holes in the tray.
*   **Base Height:** The total height of the tray, also in millimeters.
*   **Base Bottom Thickness:** The thickness of the solid base beneath the holes.

The tray itself should be a simple rectangular solid, and the holes should be created by subtracting cylinders from that solid. The holes should go completely through the base solid. Please make sure it's parametric and easy to adjust all these dimensions. I don't care about rendering parameters - just the fundamental geometry. I don't need any particular libraries either - just basic OpenSCAD primitives.

[Assistant]
Tray.scad:
```

//Hole radius
hole_radius=10; //[1:30]

//Hole spacing
hole_spacing=2; //[1:10]

//Number of rows
rows=10; //[1:30]

//Number of columns
columns=4; //[1:30]

//Height of tray
base_height=20; //[10:100]

//Base thickness under each hole
base_bottom_thickness=2; //[2:8]

base_width=rows*(hole_spacing+hole_radius*2)+hole_spacing;
base_length=columns*(hole_spacing+hole_radius*2)+hole_spacing;

//number_of_holes=(base_length-(base_length%((shell_radius+hole_spacing)*2)))/((shell_radius+hole_spacing)*2);

number_of_holes=columns;

difference()
{

	translate([0,0,-base_bottom_thickness]) cube([base_length,base_width,base_height]);

	for(i=[1:number_of_holes])
	{
		for(j=[1:rows])
		{
			translate([i*(hole_radius*2+hole_spacing)-hole_radius,j*(hole_radius*2+hole_spacing)-hole_radius,0]) cylinder(r=hole_radius,h=base_height+1);
		}
	}

}
```


[User]
I'm looking to create a phone mounting panel and clip for a VR headset, similar to what's described in this existing design, but I'd like a parametric version from scratch. My phone is a OnePlus One, but I'd like it to be easily adjustable for other phones as well.

Specifically, the design has two main parts: a panel with hinges that connects to the headset and a top clip that holds the phone in place.

For the panel:
*   It needs to have two hinge hooks at the bottom to attach to the headset. The separation between these hooks should be adjustable as a parameter, as should the width and depth of the hooks.
*   The panel's overall height should be adjustable, as well as its thickness.
*   There needs to be an upper tab at the top for the clip to attach to and for extra support. The width and height of this tab should be parametric.
*   I would like an option for the phone to have a small ledge to help align the phone. This ledge would have a depth equal to the phone's thickness (plus a small fudge factor), and the position of these ledges on the panel should be determined by phone size.

For the clip:
*   The clip needs to be a 'C' shape with rounded corners. The overall width and depth of the "C" should be parametric, as well as the thickness of the clip itself.
*   There needs to be a 'connection point' on the clip which will attach to the top tab. This connection point should have its position on the clip and size adjustable.

Overall parameters:
*   Phone height, phone depth (these control some of the other dimensions)
*   Panel height, panel thickness, tab width, tab height, hook separation, hook width, hook depth, hinge thickness,
*   Clip thickness, clip width, clip depth, foam fudge factor
*   The ability to generate just the panel, just the clip, or both parts assembled.

I'd like the whole thing to be done in OpenSCAD, ideally using the BOSL2 library for ease of use and a flexible design. Could you create the parametric SCAD files for me?

[Assistant]
Note4VR4_panel_r06.scad:
```
// A front panel to hinge and mount a OnePlus One phone into the Note4 VR Headset

// Which part to make?
part = "both"; // [first:Panel Only,second:Clip Only,both:Panel and Clip]

// Measured Width of Phone
phoneHeight = 77; // measured width of OnePlus One (sideways)

// Measured Depth of Phone (7.1 for iPhone6+, 9.1 for Oneplus One)
phoneDepth = 7.1; // measured depth of phone

/* [Hidden] */
$fn=40;
panelHeight = 80; // really measured it as 79
panelThickness = 3; // thickness of plastic for the panel
hingeThickness = 4; // thickness of lower hooks
hookSeparation = 70; // distance between the two lower hooks
hookWidth = 12; // width of the bottom hooks. Measured as 10.
hookDepth = 18; // distance from flat face to inner hook
foamFudge = 1; // fudge factor due to adding foam, clip radius being oversized, etc
tabWidth = 20; // width of upper tab
tabHeight = 8; // height to make the upper tab
clipThickness = 4; // how thick to make the clip
clipRadius = clipThickness * .5; // Same as clipThickness to make it round  clipThickness * .6; // radius for clips. They'll be slightly bigger than clipThickness
clipClearance = 55; // inner width for upper clip
clipDepthClearance = 17; // inner depth for upper clip
clipWidth = clipClearance + clipRadius; // adjusted for dimensioning
clipDepth = clipDepthClearance + clipRadius; // inner depth before taper for upper clip

if (part== "first") panel();
else if (part == "second") clip();
else if (part == "both") makeBoth();
else makeBoth();

module makeBoth()
{
	panel();

	translate ([(hookSeparation + hookWidth)/2 + hingeThickness + clipRadius, 0, 0])
	rotate([0,0,270])
	clip();
}

module panel()
{
	// create the panel itself
	union()
	{
		// first leg
		hull()
		{
			translate ([0,(panelHeight/2), panelThickness/2])
			rotate([0,90,0])
			cylinder(r=panelThickness/2, h=tabWidth, center=true);

			translate ([-hookSeparation/2, -(panelHeight/2 + panelThickness/2), panelThickness/2])
			rotate([0,90,0])
			cylinder(r=panelThickness/2, h=hookWidth + 2*hingeThickness, center=true);
		}

		// second leg
		hull()
		{
			translate ([0,(panelHeight/2), panelThickness/2])
			rotate([0,90,0])
			cylinder(r=panelThickness/2, h=tabWidth, center=true);

			translate ([hookSeparation/2, -(panelHeight/2 + panelThickness/2), panelThickness/2])
			rotate([0,90,0])
			cylinder(r=panelThickness/2, h=hookWidth + 2*hingeThickness, center=true);
		}

		// add tab
		difference()
		{
			hull()
			{
				translate ([-tabWidth/2, panelHeight/2 + tabHeight/2 - 1, panelThickness/2])
				rotate ([90,0,0])
				cylinder (r=panelThickness/2, h=tabHeight + 2, center=true);

				translate ([tabWidth/2, panelHeight/2 + tabHeight/2 - 1, panelThickness/2])
				rotate ([90,0,0])
				cylinder (r=panelThickness/2, h=tabHeight + 2, center=true);
			}

			// remove a notch for better clip grip
			translate ([0,(panelHeight + hingeThickness)/2, -clipRadius])
			rotate ([0,90,0])
			cylinder (r=clipRadius+.5,h=tabWidth * 2,center=true);
		}

		// add hooks
		translate ([-hookSeparation/2, -panelHeight/2, 0])
		hook();

		translate ([hookSeparation/2, -panelHeight/2, 0])
		hook();

		// add nubbins for onePlus self alignment (uncomment and adjust "phoneHeight" to make a mini platform to auto-align your phone)
		translate ([-(hookSeparation/2+hookWidth/2), -(panelHeight - (panelHeight - phoneHeight)/2) / 2, (panelThickness + phoneDepth + foamFudge) / 2])
		cube ([hookWidth/2, (panelHeight - phoneHeight)/2, phoneDepth], center=true);

		translate ([hookSeparation/2+hookWidth/2, -(panelHeight - (panelHeight - phoneHeight)/2) / 2, (panelThickness + phoneDepth + foamFudge) / 2])
		cube ([hookWidth/2, (panelHeight - phoneHeight)/2, phoneDepth], center=true);

	}
}

module hook()
{
	// create the hooks
	difference()
	{
		hull()
		{
			translate ([0, -panelThickness/2, panelThickness/2])
			rotate([0,90,0])
			cylinder(r=panelThickness/2, h=hookWidth + 2*hingeThickness, center=true);

			translate([0, -hingeThickness/2, hingeThickness/2 + hookDepth + phoneDepth + foamFudge])
			rotate([0,90,0])
			cylinder(r=hingeThickness/2, h=hookWidth + 2*hingeThickness, center=true);

		}

		translate ([0, -hingeThickness/2, panelThickness/2 + hookDepth/2 + phoneDepth + foamFudge])
		cube ([hookWidth, 100, hookDepth], center=true);
	}

	// draw the cylinder back in
	translate([0, -hingeThickness/2, hingeThickness/2 + hookDepth + phoneDepth + foamFudge])
	rotate([0,90,0])
	cylinder(r=hingeThickness/2, h=hookWidth * 1.5, center=true);

}

module clip()
{
	translate ([0,0,clipThickness/2])
	intersection()
	{
		union()
		{
			hull()
			{
				corner1();
				corner2();
			}
			hull()
			{
				corner1();
				corner3();
			}
			hull()
			{
				corner2();
				corner4();
			}
			hull()
			{
				corner3();
				corner5();
			}
			hull()
			{
				corner4();
				corner6();
			}
			hull()
			{
				corner5();
				corner6();
			}
		}

		cube([1000,1000,clipThickness],center=true); // narrowing the clip to create flats.
	}
}

module corner1() translate([-clipWidth/2,0,0]) sphere(r=clipRadius, $fn=20);
module corner2() translate([clipWidth/2,0,0]) sphere(r=clipRadius, $fn=20);
module corner3() translate([-clipWidth/2,clipDepth,0]) sphere(r=clipRadius, $fn=20);
module corner4() translate([clipWidth/2,clipDepth,0]) sphere(r=clipRadius, $fn=20);
module corner5() translate([-(tabWidth + clipThickness + 1)/2,clipDepth + phoneDepth + foamFudge + clipRadius + panelThickness,0]) sphere(r=clipRadius, $fn=20);
module corner6() translate([(tabWidth + clipThickness + 1)/2,clipDepth + phoneDepth + foamFudge + clipRadius + panelThickness,0]) sphere(r=clipRadius, $fn=20);

```


[User]
Hi! I'm looking to design a parametric lens holder for a VR headset, similar to the one I found on Thingiverse, but I need to be able to adjust even more parameters. I'm not sure how best to approach it, and could really use some help from an OpenSCAD expert.

The basic idea is to create a clip that holds two lenses in place in front of a phone screen.  I want it to be highly customizable, so I can use it with different headsets and different lenses.

Here are the key parameters I need to be able to adjust:

*   **IPD (Inter-Pupillary Distance):** The distance between the centers of the two lenses.
*   **lensSize1 and lensSize2:** The diameters of the left and right lenses, respectively (they might be different).
*   **visorWidth:** The outer width of the headset visor where the clip will attach.
*   **slotWidth:** The width of the slots that will hold the clip onto the visor.
*   **lensThickness:** The thickness of the edge of the lenses.
*   **lensLip:** The size of the rim of plastic holding the lenses in.

The design should have two main parts:

1.  **Lens holders:** Circular openings that securely hold each lens with a small lip to prevent them from falling through, and a bevel around the edge.
2.  **Mounting arms:** The arms that connect the lens holders to the visor and incorporate the visor slots.  These should be rigid enough to hold the lenses in place, and not cause warping. A cross piece to connect the two arms for added rigidity would also be great.

I'm not that familiar with OpenSCAD, but I'd like to make sure it's well structured, so if you could use good module design and proper parameter passing, that would be great. I'm not planning to use any special libraries, just basic OpenSCAD primitives, so no need to include any library files or anything.

I’m looking forward to seeing what you can come up with! Thanks in advance for the help.

[Assistant]
LensClip_r04.scad:
```
// parametric lens holder for Note4 VR OpenDive Headset (and others)

IPD = 65; // Inter-Pupillary Distance. How far apart the center of the two lenses will be.
lensSize1 = 40.5; // diameter of one of the lenses you are using
lensSize2 = 40.5; // diameter of the other lens you are using
visorWidth = 149; // outer width of the visor.  this is how wide the lens clip will be
slotWidth = 10; // how wide the slots for the lens clip are
lensThickness = 2; // thickness of the edge of the lens

/* [Hidden] */
$fn=40;
lensLip = 1; // how big the rim of plastic holding the lens in will be
mountStart = (IPD+(lensSize1 + lensSize2)/2)/2 + 4; // an intermediate value
mountMid = (visorWidth/2-mountStart)/2 + mountStart;

lensClip();

module lensClip()
{
	difference ()
	{
		union()
		{
			hull()
			{
				translate([-(IPD/2+1),0,lensThickness/2 + 2])	cylinder(r=lensSize1/2 + 2, h=lensThickness +4, center=true);
				translate([-mountStart, 0, 5]) cube([.01, slotWidth, 10], center=true);
			}
			translate([-mountMid, 0, 5]) cube([visorWidth/2 - mountStart, slotWidth, 10], center=true);

			hull()
			{
				translate([(IPD/2+1),0,lensThickness/2 + 2])	cylinder(r=lensSize2/2 + 2, h=lensThickness +4, center=true);
				translate([mountStart, 0, 5]) cube([.01, slotWidth, 10], center=true);
			}
			translate([mountMid, 0, 5]) cube([visorWidth/2 - mountStart, slotWidth, 10], center=true);

			// crosspiece
			hull()
			{
				translate([0, 5, 12]) rotate([90,0,0]) cylinder(r=2,h=6,center=true);
				translate([-12, 4, 3]) rotate([90,0,0]) cylinder(r=3,h=8,center=true);
			}
			hull()
			{
				translate([0, 5, 12]) rotate([90,0,0]) cylinder(r=2,h=6,center=true);
				translate([12, 4, 3]) rotate([90,0,0]) cylinder(r=3,h=8,center=true);
			}
			translate([-(IPD/4 + 6),4,3]) cube([IPD/2-12,8,6], center=true);
			translate([(IPD/4 + 6),4,3]) cube([IPD/2-12,8,6], center=true);
		}

	// slot mount cutouts
	translate ([-mountMid, 0, 5])
	{
		cube([visorWidth/2 - mountStart + 1, 2, 11],center=true);
		rotate([0,90,0]) cylinder(r=2, h=visorWidth/2 - mountStart + 1, center=true, $fn=10);
	}

	translate ([mountMid, 0, 5])
	{
		cube([visorWidth/2 - mountStart + 1, 2, 11],center=true);
		rotate([0,90,0]) cylinder(r=2, h=visorWidth/2 - mountStart + 1, center=true, $fn=10);
	}
	// lens cutouts
	translate ([-IPD/2,0,lensThickness/2 + 2]) lensCutOut(lensSize1);
	translate ([IPD/2,0,lensThickness/2 + 2]) lensCutOut(lensSize2);

	// lens gap
	translate([0,-50,3]) cube([IPD,100,50], center=true);

	}
}

module lensCutOut(lensSize)
{
	union()
	{
		cylinder(r=lensSize/2 - lensLip, h=100, center=true);

		// creating a bevel
		hull()
		{
			cylinder(r=lensSize/2, h=lensThickness, center=true);
			cylinder(r=lensSize/2-lensLip, h=lensThickness + lensLip, center=true);
		}
	}
}
```


[User]
Hey, I'm trying to make some letter blocks in OpenSCAD, similar to those kids' blocks, and I'd like it to be fully parametric so I can change the size easily. I have a general idea of how I want them to look, but I need some help getting all the details worked out.

Basically, I want each block to be a cube with a letter cut out of the face. The cube should have a slight difference in height - it'll be centered along the x and y axis, but will be half as tall as it is wide and deep. Then, the letter should be cut out from that face using linear extrusion. I want the letter to be centered on the face, and I want the letter to take up a good portion of the area, but not so much that it gets too close to the edges.

I want the code to generate a full alphabet of these blocks, with the size of the blocks and the spacing between the blocks to be parametric. The blocks should be laid out in a grid pattern. So, if I give a size of 30, the blocks should be arranged in a grid with spacing between them, each one the right size, each one with a unique letter.

For the font, I'd like to use Tahoma since it's pretty clear and easy to read. I'd also like the text to be extruded a good amount into the block, so that they have a good enough depth.

Can you please generate an OpenSCAD file, or however many files you think are best for organizing this, that implements this?

[Assistant]
LetterBlock.scad:
```
module LetterBlock(letter, size=30) {
    difference() {
        translate([0,0,size/4])
          cube([size,size,size/2], center=true);
        translate([0,0,size/6])
            linear_extrude(height=size, convexity=3)
                text(letter,
                     size=size*22/30,
                     font="Tahoma",
                     halign="center",
                     valign="center");
    }
}

size=30;
for (i=[0:25])
  translate([(i%5)*(size+3),floor(i/5)*-(size+1),0])
    LetterBlock(chr(i+65), size);

```


[User]
I'm looking to design a parametric spool holder system for 3D printer filament, and I'd like to use OpenSCAD to generate the models. I've got a basic idea in mind based on a few designs I've seen online, but I want something more flexible and easier to expand.

Essentially, I want a system that lets me mount individual spool holders on a wall or board. The key is that each holder should be independent, not part of a larger frame, so I can easily add more as needed without having to reprint a whole new structure.

I'd like two main types of holders: one with an upward-angled support arm and another with a downward-angled one. This way, I can mount two rows of spools, one above the other, and the angled arms will keep the spools from bumping into each other or the wall. Think of it like a simplified version of the linked Thingiverse designs (119920 and 513457), but with independent, simpler mounting brackets and individual rods instead of the full width supports.

Each holder will consist of:
1.  A flat, rectangular mounting bracket that attaches to the wall/board. I want to include two countersunk screw holes for easy mounting, one near the top and another at the bottom, and I'd like to be able to define the size of these holes.

2.  A support arm that extends from the bracket. This arm should have an angle relative to the mounting bracket's face. The angle should be a parameter that can be adjusted to achieve either the upward or downward angle, and I'd like to set the length and thickness of this arm as well.

3.  A cylindrical rod where the spool actually sits. This rod needs to be able to slide through the end of the support arm and be held in place, preferably via a friction fit or some other simple, easily printed method. I'd like to parameterize the rod's diameter and the length that is intended to stick out from the mount. I think a friction-fit for the rod into the arm is preferable to threading. I would also like the ability to specify whether to use a rod with a through-hole to reduce filament snagging. It's very important that the actual rod is printable without support and requires minimal post-processing to be used.

I'd like to parameterize as much as possible, so I can easily adjust for different spool sizes and mounting requirements. Things like the bracket width, height, and thickness; the support arm length, thickness, and angle; the rod diameter and length; and the screw hole diameter should all be adjustable.

I am not looking for a design that snaps together or has any sort of interlocking feature, just the screw hole mounting to a flat surface.

I'm not sure exactly how best to implement the friction fit or through-hole, so I'm open to suggestions for how to achieve this most effectively using OpenSCAD. I'm not using any particular library or existing OpenSCAD code, so I'd like for everything to be generated from scratch.

Can you generate the OpenSCAD code for this system, including the two types of mounting brackets (upward and downward angled), keeping in mind the parametric requirements I've outlined?

[Assistant]
Spool_Rack.scad:
```
type = 2;
width = 25;
height = 130;
length = 145;
thickness = 8;
hole_size = 2.5;
bar_size = 32;
bar_radius = 20;
bar_length = 110; // 110 for most spools
hook_size = bar_size + thickness * 2;

if (type == 0 || type == 1) {
rotate([0,-90,0]) {
translate([0, -20, 0])
{
	difference() {
		// upright
		cube([width, height, thickness]);

		// screw holes
		translate([width / 2, width / 2, -.1])
			cylinder(h = thickness + .2, r = hole_size, $fn = 10);
		translate([width / 2, height - width / 2, -.1])
			cylinder(h = thickness + .2, r = hole_size, $fn = 10);
	}
}
// lower bar
translate([0, 0, thickness])
	if (type == 0)
	rotate([-28, 0, 0])
		cube([width, thickness, length - hook_size + 44]);
	else
	rotate([-35, 0, 0])
		cube([width, thickness, length - hook_size + 17]);

// upper bar
translate([0, height - 40 - thickness, 0])
	cube([width, thickness, length - hook_size]);
// hook
translate([0, height - 65, length - hook_size])
{
	union()
	{
		if (type == 0) {
		difference() {
			cube([width, 25, hook_size]);
			translate([-.1, thickness, thickness - 1])
				cube([width + .2, 20, bar_size + 2]);
		}
		translate([0,thickness,0])
			linear_extrude(height = hook_size)
				polygon([[0,0],[10,0],[0,10]]);
		translate([width, thickness, 0])
			linear_extrude(height = hook_size)
				polygon([[0,0],[-10,0],[0,10]]);
		}
		else {
		difference() {
			cube([width, 25, hook_size]);
			translate([-.1, -.1, thickness - 1])
				cube([width + .2, 20, bar_size + 2]);
		}
		translate([0,20,0])
			linear_extrude(height = hook_size)
				polygon([[0,0],[10,0],[0,-10]]);
		translate([width, 20, 0])
			linear_extrude(height = hook_size)
				polygon([[0,0],[-10,0],[0,-10]]);
		}
	}
}
}
}
else {
	difference() {
	rotate([0, -90, 0])
		intersection() {
			cylinder(h = bar_length, r = bar_radius);
			translate([0, - bar_size / 2, 0])
				cube([bar_size, bar_size, bar_length]);
	}
	translate([-11, bar_size / 2 + .1, -.1])
		rotate([90, 0, 0])
			linear_extrude(height = bar_size + .2)
				polygon([[0,0],[10,0],[0,10]]);

	translate([-bar_length + 11, bar_size / 2 + .1, -.1])
		rotate([90, 0, 0])
			linear_extrude(height = bar_size + .2)
				polygon([[0, 0], [-10, 0], [0, 10]]);
	}
}
```


[User]
I'm looking to design a parametric fan mount for a 3D printer, specifically for mounting to the frame rods. I've seen some designs on Thingiverse (like http://www.thingiverse.com/thing:36300 and http://www.thingiverse.com/thing:299659) that get the basic idea, but I want to be able to control more aspects of the design.

Here's what I need:

*   **Rod Mount:** The mount needs to clamp onto a frame rod. I need to specify the rod diameter as a parameter. It should have a cutout so it doesn't completely encircle the rod. The angle of the rod should be an adjustable parameter too. The part that grabs the rod should not make the object stick out too much, so there should be a maximum height parameter.
*   **Mounting Arm:** An arm should extend from the rod mount. The length of this arm, and where along the arm the fan mount is situated needs to be customizable. I also want to be able to control how long the arm runs parallel to the rods before the mounting for the fan begins. The arm should not be rectangular but should have a few rounded edges.
*   **Fan Mount:** This part should have a clamping mechanism for the fan, so that the fan width is an adjustable parameter. I'd also like to be able to adjust the clip angle on the fan. This clip shouldn't interfere with the fan by being too deep, and should have a way to ensure a secure fit, such as with a small peg on one end that has a counterpart on the other end of the clip.
*   **Mirroring:** The whole part should be mirrored about the X axis, so I can have a second fan on the other side of the rod.

The design needs to be fully parametric, so all the dimensions I described can be modified via parameters at the top of the SCAD file.

I'd like the code to be clean and easy to read, ideally I'd like it to be organized into modules.

I’d like the code to use OpenSCAD’s built-in functions, and not require any external libraries.

[Assistant]
FanMount.scad:
```
//Rod Diameter
diameter=8.1 ;
//height of everything
height=8;
// Distance of the Fan from the middel of the Rod Y-direction
leangth=117.5;
//Distance of the mounting hole to the middel of the Rod in X direction ( not adjusted for clipangel different from 0)
width=62.5;
//angle of the Frame Rods, Mendel has 60° (change this to adjust the angle of the fan if you wnat to point it on the print bed)
rodangel=60;
//angle of the Clip, maybe you want to Fnas to mount like a V
clipangel=0;
//Ratio of the FrameMount Cutout
cutoutRatio=0.7;
//Fanwidth
fanwidth=26;
//Leagth of the Grip arms, has to be smaller than width
gripleangth=17;

//making the grib module longer when changing the angel of the rod
mountleangth=diameter*1.5+cos(rodangel)*height*2.5;

module grip()
{
translate ([0,-(mountleangth)/2,0])difference()
	{
	translate([-diameter*3/4,-mountleangth/2,-height/2]) //block
		cube([diameter*3/2,mountleangth,height]);

	rotate([-90-rodangel,0,0]) cylinder(h=height*6, r=diameter/2,center=true,$fn=30); //Rod Cutout
	rotate([-90-rodangel,0,0])translate([-diameter*cutoutRatio/2,0,-20]) cube([diameter*cutoutRatio, 40,40]); //Entry Cutout
	}
}

module arm()
{
translate([0,0,-height/2])union()
	{
	translate([-height/4,0,0])cube([height/2,leangth-mountleangth/2+fanwidth/2,height]);
	translate([0,leangth-mountleangth/2-height/4+fanwidth/2,0])cube([width-gripleangth,height/2,height]);
	translate([height/6,leangth-mountleangth/2-height/6+fanwidth/2,0]) cylinder(h=height,r=height/2,$fn=30 );
	translate([width-gripleangth,leangth-mountleangth/2+fanwidth/2,0]) cylinder(h=height,r=height/2,$fn=30 );
	}
}

module clip()
{ translate([width-gripleangth,leangth-mountleangth/2+fanwidth/2,0]) rotate([0,0,clipangel])union(){
mirror([0,1,0]) halfclip();
halfclip();
}}

module halfclip()
{
	translate([0,-(fanwidth)/2,-height/2])union()
	{
	cube([height/2,(fanwidth)/2,height]);
	translate([0,-height/4,0])cube([gripleangth+5,height/4,height]);
	translate([gripleangth, 0, height/2])rotate([-90,0,0])cylinder(h=2.1,r=2,$fn=30);
	}

}

module whole()
{union(){
grip();
arm();
clip();
}
}

whole();
translate([-20,0,0]) mirror([1,0,0]) whole();
```


[User]
Okay, I'm looking to create a set of adjustable pillars for Märklin H0 C-track, similar to the design described in the `pillar_v2_1.scad` file I've provided. It's a ramp system, with pillars of varying heights to elevate the track.

Here's what I need:

**Core Functionality:**

*   **Parametric Pillar Generation:**  I want a module that generates a single pillar with adjustable height. The pillar should have a wider base than top, with a cylindrical body, and a flat platform on top. The base should also have a flat plate for stability.
*   **Track Bed Integration:** The top of each pillar needs a "tie" section that conforms to the Märklin C-track geometry, allowing the track to sit securely.  This should include a groove that sits inside the rail.
*   **Ramp Creation:** I need a module that can generate an entire ramp, which is basically a series of these pillars with incrementally increasing heights, to create the incline.
*   **Adjustable Parameters:** I need to be able to control the following parameters:
    *   `pillar_count`: The number of pillars in the ramp.
    *   `max_height`: The total height of the highest pillar in the ramp.
    *   `tie_width`: The width of the track tie section, which should be close to 46mm but I'd like it to be configurable.
    *   `segment_length`: The horizontal distance between pillars (this influences the slope). 188mm is a good starting point, but it needs to be a parameter.
    *   `make_groove_for_7224_on_top_level_pillar`: A boolean switch to control whether a groove for a 7224 current collector is created on the top-level pillar.
    *   `top_level_text`:  A text label to put on the top pillar, with the ability to choose font and text height.
*   **Top Level Pillar Only:** I need a way to generate just the top-level pillar (the tallest one) by itself. This is useful for making a single level section of track.
*   **Numbering:** Each pillar should be numbered (like 1, 2, 3, etc) and this should also be printed on the pillars.
* **Labeling:** Each pillar should have its height printed on the pillar.

**Details:**

*   The pillars should be arranged in a grid layout. The original code uses a 2xN array. It would be nice to make this configurable.
*   The track bed (the part that sits under the rails) needs to be angled slightly relative to the top of the pillar (like in the original code) so the track has a stable surface.
*   The text and numbers should be printed on the pillars using the `write()` function, and the font should be configurable.

**Libraries:**

I'm assuming this would all be done in pure OpenSCAD and use the standard `write/Write.scad` library.

Let me know if you have any questions.

[Assistant]
pillar_v2_1.scad:
```
// 'Pillar Set for Märklin H0 C-Track' by wstein
// is licensed under the Attribution - Non-Commercial - Share Alike license.
// Version 2.1 (c) March 2017
// please refer the complete license here: http://creativecommons.org/licenses/by-nc-sa/3.0/legalcoe

use <write/Write.scad>

/* [Basic] */

// Which part would you like to see?
part = "ramp"; // [top:only top level pillar,ramp:complete set for one ramp]

//number of pillars for one ramp. default=12
pillar_count=12;

//top level height. default=78mm
max_height = 78;

//Text on top level pillar. default=RepRap
top_level_text="RepRap";

/* [Expert] */
//adjust this value if the track does not fit, should be tight! default=46mm
tie_width = 46;

//Track segment lenght between two pillars 172..188 should be perfect. default=188mm
segment_length=188;

//default=true
make_groove_for_7224_on_top_level_pillar=1; //[1:true, 0:false]

/* [Hidden] */

degree = asin(max_height/segment_length/pillar_count);
echo("degree: ", degree);

first=1;
last=pillar_count;

if(part == "top")
render(top_level_text, max_height, tie_width, 0, 0, make_groove_for_7224_on_top_level_pillar, top=true);
else
render_set(false);

module render_set(groove_for_7224) {
	pillar_delta=max_height/pillar_count;

	for(i=[first:last])
	assign(height=i*pillar_delta)
	assign(x=25*(floor((i-1) % (pillar_count / 2) + 1)))
	assign(y=70*(floor((i-1) / (pillar_count / 2))))
	translate([x,y,0])
	render(str(i),height, tie_width, degree, i == pillar_count ? 0 : degree, groove_for_7224);
}

label_thickness = 0.6;
label_height = 7;
label_font="orbitron.dxf"; //[orbitron.dxf,Letters.dxf,knewave.dxf,BlackRose.dxf,braille.dxf]

module pillar(height = 4, scale_x = 1, scale_y = 0.6) {
	rad = 5;
	plate = 2;

	top_diameter = 2*rad;
	bottom_diameter = 2*rad+height/10;
	plate_diameter = bottom_diameter + 2*rad + 2*plate;
	wall_thick = 1.55;

	difference()
	{
		union()
		{
			scale([scale_x,scale_y,1])
			{
				cylinder(h=plate, r=plate_diameter/2);
				translate([0,0,plate])
					cylinder(h=plate/2, r1=plate_diameter/2, r2=(bottom_diameter+plate)/2);
			}
			scale([scale_x,scale_y,1]) hull()
			{
					translate([0,0,height-1.5])
						resize([top_diameter, top_diameter, 0])
						cylinder(h=.1, r=bottom_diameter/2);
					translate([0,0,0.5])
						cylinder(h=.1, r=bottom_diameter/2);
			}
		}
	}
}

module tie(width = 77.5, groove = 1, degree1 = 0, degree2 = 0, groove_for_7224 = false)
{
	 rad = 7.5;
	 thick = 1;
	 bedwidth = 40;

	 difference()
	 {
		 union()
		 {
				 difference()
				 {
						hull()
						{
							translate([0,0,-rad])
							cylinder(rad,thick/2,rad);

							translate([0,width,-rad])
							cylinder(rad,thick/2,rad);
						}
						translate([0,width/2,thick+rad])
						cube([width,2*width,2*thick+2*rad],center=true);
				 }

				// halter
				difference() {
					translate([0,width/2,3/2])
					cube([2*rad, bedwidth+2*3, 3], center=true);

					if(groove_for_7224)
					translate([0,width/2,0])
					cube([2, 65, 10],center=true);
				 }
		 }
		 trackbed(width, bedwidth, groove, degree1, 1);
		 trackbed(width, bedwidth, groove, degree2, -1);

	 }
}

module trackbed(width = 77.5, bedwidth = 40, groove = 1, degree1 = 0, factor = -1)
// Trackbed
translate([0,(width-bedwidth)/2,-groove])
rotate([0,-90-degree1,0])
translate([0,0,factor*9.5])
linear_extrude(height=20, center=true, convexity=10)
polygon(points = [ [0, 0], [bedwidth/2*tan(60), bedwidth/2], [0,bedwidth] ], faces = [ [0, 1, 2] ]);

module helper(width = 77.5, height)
{
	rotate([0,-90,0])
	linear_extrude(height=1, center=true, convexity=10)
		polygon(points = [[0, 0], [2, 0], [2, width], [0, width], [-width/3,width/2] ]);
}

module noarch(height = 4, width = 77.5) {
	 rad = 7.5; //from module tie
	 thick = 3;

	 translate([0,0,height-rad])
	 helper(width);
}

module render(text, height = 72, width = 46, degree1 = 0, degree2 = 0, groove_for_7224 = false, top = false) {
	difference() {
		union() {
			translate([0,width/2,0])
			rotate([0,0,90])
			pillar(height,1.5,.5);

			translate([0,0,height])
			difference()
			{
				tie(width, 0, degree1, degree2, groove_for_7224);

				if(!top)
				for(a=[-tie_width/4,tie_width/4])
				translate([0,width/2+a,-label_thickness])
				rotate([degree,0,60])
				cylinder(r=4,h=5,$fn=3);

				translate([0,width/2,-label_thickness+2/2])
				rotate([degree,0,-90])
				write(text, h=label_height, t=2, font=label_font, center=true);
			}

			noarch(height,width);
		}
		translate([0,width/2,-width])
		cube([20,2*width,2*width],center=true);

		translate([0,width/2,0])
		rotate([180,0,-90])
		write(str(round(10*height)/10), h=label_height, t=label_thickness*2, font=label_font, center=true);
	}
}

```


[User]
Hey there, I'm looking to create a parametric fractal tree or fern in OpenSCAD, and I've got a pretty good idea of the parameters I'd like to control. I'm hoping you can help me generate the OpenSCAD code.

Essentially, I'd like the design to be based on a recursive branching structure. Each branch should have two sub-branches: a "long stem" and a "short stem." The short stem should come off the end of the long stem and at an angle. Both stems should have a cylinder shape with a sphere at the very end, which I'll refer to as a knee, and should be nested within each other. At the end of a branch, instead of continuing with a stem, I want it to have a leaf - just a simple sphere at the end of the stem. I'd like to control the following properties:

*   **Recursion Depth (n):** This will control how many levels of branching we have.
*   **Stem Thickness (w):** This will set the base thickness of the long stems. I'd also want the short stem's thickness to be relative to the thickness of the long stem.
*   **Stem Length (d):** This will be the base length of the long stems. Again, I'd like the short stem's length to be relative to the long stem length.
*   **Curling Angle (a):** This is the angle at which each branch will bend over.
*   **Rotation (rot):** This would control a rotation around the z-axis at each branch point (0 or 1 to enable/disable the rotation)
*   **Mirroring (mir):** This would control whether or not a mirror is applied around the y-axis on every sub-branch (0 or 1 for enable/disable mirroring).

I also want the proportions to be based on the golden ratio, specifically:

*   The thickness of the short stem should be `w * gc`, where `gc = (sqrt(5) - 1) / 2`.
*   The length of the short stem should be `d * gc^3`.
*   The leaf size should be a fraction of the stem length, with dimensions based on `lzs`, which is calculated based on `gc` (`lzs = 1 / gc`).
*   The leaf dimensions would then be `[lzs * gc^2, lzs * gc^5, lzs]`.

I need the code to use some kind of decay mechanism to ensure the recursion terminates, based on the current depth and a couple of thresholds. This might be something that could be passed to both long and short modules to keep track of "stem" depth and "leaf" depth, which will need to have their own thresholds.

Finally, I would like to have a little bit of coloring so it looks more like a tree or a fern. I want each stem to be colored with `[i/64,0.5-i/64,0]` where `i` is equal to the level of recursion. I would also like each leaf to be colored based on the `i`, but I don't have a specific value in mind. Something simple and easy to understand, I guess? Perhaps something that approaches a dark green as `i` increases. Oh, and could you use `$fn = 10` to control the polygon resolution to help keep the scad files from taking too long to render.

I'm hoping you can generate the OpenSCAD code for this, including any necessary modules. I don't want to have to use any external libraries, though. Thanks!

[Assistant]
fern-o-tree.scad:
```
// recursion
n = 17;
// stem thickness
w = 0.5;
// stem length
d = 13;
// curling
a = -9;
// rotate
rot = 1; // [0:1]
// mirror
mir = 1; // [0:1]

// n+1 / n ratio
gc = (sqrt(5) - 1) / 2;
wgc = w * gc;
// short / long stem ratio
sq = pow(gc, 3);
dsq = d * sq;
// leaf length
lzs = 1 / gc;
// leaf dimensions
ls = [lzs * pow(gc, 2), lzs * pow(gc, 5), lzs];

// branching delay
q = 1 + (1 - gc) / 2;
// details
$fn = 10;
// leaf treshold
ee = 0.1;
// stem treshold
eee = 0.04;

long(n);

module long(i, e = 1) {
	rotate(a, [1, 0, 0]) {
		color([i/64,0.5-i/64,0]) {
			cylinder(d, w, wgc * (1 + sq)); // long stem
			translate([0, 0, d]) sphere(1.025 * wgc * (1 + sq)); // knee
		}
		translate([0, 0, d])
		do_rotate(rot)
		{
			if (i >= 1 && e > eee) short(i - 1, e); // short stem
			else leaf();

			rotate(-72, [0, 1, 0])
			do_mirror(mir)
			{
				if (i >= 4 && e > ee) scale(q*gc*gc) long(i - 4, e*q*gc*gc); // branch
				else leaf(i);
			}
		}
	}
}

module short(i, e = 1) {
	rotate(a*gc, [1, 0, 0]) {
		color([i/64,0.5-i/64,0]) {
			cylinder(dsq, wgc * (1 + sq), wgc); // short stem
			translate([0, 0, dsq]) sphere(1.025 * wgc); // knee
		}
		translate([0, 0, dsq])
		do_rotate(rot)
		{
			if (i >= 1 && e > eee) scale(gc) long(i - 1, e*gc); // long stem
			else leaf();

			rotate(72, [0, 1, 0])
			do_mirror(mir)
			{
				if (i >= 4 && e > ee) scale(q*gc*gc) long(i - 4, e*q*gc*gc); // branch
				else leaf(i);
			}
		}
	}
}

module leaf(i = 1, r = 6) {
	color([(i <= 3 ? i : 3)/3 * 63/255, (1 - (i<=3 ? i : 3)/6) * 255/255,0])
		translate([0, 0, r * lzs]) scale(ls) sphere(r);
}

module do_rotate(is_rotate) {
	if (is_rotate) {
		rotate(72, [1, 0, 3]) children();
	} else {
		children();
	}
}

module do_mirror(is_mirror) {
	if (is_mirror) {
		mirror([0, 1, 0]) children();
	} else {
		children();
	}
}
```


[User]
Okay, I'm looking to create a customizable design that can function as a vase, pencil holder, or even a small decorative box depending on the parameters. I really like the look of the parametric spiral in the provided example, and would like the design to use a similar base, but I want it to be fully enclosed and hollow, not just a spiral extrusion. I have some specific ideas about how I'd like to be able to customize it.

First, I'd like to be able to control the overall size, and I'd like the base to be a circle. So, maybe a diameter parameter and a height parameter would cover that?

Second, the spiral itself should be customizable. I want to control how many "arms" the spiral has. And, each of those arms should be able to be adjusted in width and shape (maybe a parameter to control the number of sides?). I would like the spiral to have the option to taper towards the top. The number of twists, like in the example, is another important factor that I'd like to control.

Third, I need the option to add a bottom and a top to the design. The top can optionally have a hole in the center, in case I want to use it as a vase or a pencil holder. The bottom should be a simple flat base.

Finally, I want to make the whole thing hollow so I can actually use it as a container. The wall thickness should be adjustable. Maybe use a minkowski sum for the walls? It seems like the provided code uses a simple wall with squares. If that's easier to do, I would be fine with the design using a wall with rectangles.

It would be great if the design was parameterized so that I can easily tweak these aspects and it has good use of comments so that I can read through it. I'm okay with using libraries, like BOSL2 or something similar if it will help make the process easier. I just need to be able to install them. I don't have an idea of which library would work best, though.

I think that's all for now. Can you help me create this parametric design?

[Assistant]
parametric_spiral.scad:
```
////////////////////////////////
//
// HEXACORDE
//
// Parametric spiral
// 15.01.2015
////////////////////////////////

//Adjust the radius.
radius = 50; // [10:75]

//Adjust the height.
heigth = 60; // [1:100]

//Adjust ratio.
ratio = 45; // [1:100]

//Number of cylinders.
nb_cylinder = 20; // [1:20]

//Adjust cylinder radius.
radius_cylinder = 2; // [1:30]

//Adjust wall thickness.
wall_thickness = 3; // [1:24]

//Adjust twist
nb_twist = 100; // [1:1000]

//botom
bottom = "Yes"; // [Yes,No]

$fn=30;

module section()
{
	for (nb = [0: nb_cylinder])
	{
	    rotate(360*nb/nb_cylinder,[0,0,1])
	    translate([radius, 0, 0])
	    {
	    	circle(r= radius_cylinder, h= heigth);
			rotate(90+180/nb_cylinder,[0,0,1])
			translate(v=[0,-wall_thickness/2,0])
	    	color("green")square([2*cos((180/nb_cylinder)-90)*radius,wall_thickness]);
	    }
	}
}

module half_sphere()
{
	difference()
	{
		sphere(r=radius_cylinder);
		translate(v=[-radius_cylinder,-radius_cylinder,0])cube(radius_cylinder*2,radius_cylinder*2,radius_cylinder*2);
	}
}

//////////////////////////////////////////////////////////
rotate(180,[1,0,0])
	{
	linear_extrude(height = heigth, center = false, convexity = 20, twist = nb_twist , slices = 200, scale = ratio/100)section();

   if(bottom == "Yes")
		translate(v=[0,0,heigth])cylinder(r = (radius+radius_cylinder)*ratio/100,h=3);
/*
//half_spheres
half_spheres	= "No"; // [Yes,No]
	if (half_spheres == "Yes")
	{
		for (nb = [0: nb_cylinder])
			{
			rotate(360*nb/nb_cylinder,[0,0,1])
			translate([radius, 0, 0])half_sphere();
			}
	}
*/
}

```


[User]
Hey, I'm looking for some help designing a customizable 3D model. I'd like a triangular prism shape, but with a hollow interior – essentially, a triangular shell. I've got some ideas for the parameters, and I'd like to be able to adjust the side length of the triangle, the overall height of the prism, and the thickness of the walls.

I'm thinking of starting with these variables:

*   `side_length`: This controls the length of each side of the triangle base. I'd want this to be adjustable, probably between 10 and 400 units.
*   `height`: This would be the height of the prism, so how tall it is. I'd like to adjust this between 1 and 400 units.
*   `wallthickness`: This would set the thickness of the walls of the triangular shell, between 1 and 30 units.

Can you create an OpenSCAD file that lets me modify these parameters to generate the 3D model? I think that's all I need for this profile. Thanks!

[Assistant]
Triangle.scad:
```
// variables
side_length = 10; // [10:400]
height = 30; // [1:400]
wallthickness = 1; // [1:30]
// calculations
scale = (side_length*(sqrt(3)/2)-(3*wallthickness))/(side_length*(sqrt(3)/2));
// model
linear_extrude(height=height) difference(){
polygon(points=[[-side_length/2,-tan(30)*side_length/2],[side_length/2,-tan(30)*side_length/2],[0,side_length/2/cos(30)]]);
scale([scale,scale,0]) polygon(points=[[-side_length/2,-tan(30)*side_length/2],[side_length/2,-tan(30)*side_length/2],[0,side_length/2/cos(30)]]);
}

```


[User]
I'm looking to create a customizable rectangular box with adjustable dimensions and wall thickness. The box should be hollow, with the wall thickness being uniform around the entire inner space.

I need to be able to specify the overall length, width, and height of the outer dimensions of the box, as well as the wall thickness. The inner dimensions should be automatically calculated based on these parameters.

Could you generate the necessary OpenSCAD code for this? I'd like a single file to contain all the code for this.

[Assistant]
Square.scad:
```
// variables
length = 10; // [10:400]
width = 10; // [10:400]
height = 30; // [1:400]
wallthickness = 1; // [1:30]
// model
difference(){
cube(size=[length,width,height],center=true);
cube(size=[length-2*wallthickness,width-2*wallthickness,height],center=true);
}

```


[User]
Hey, I'm looking to create a parametric mini-sandwich maker with a twist! I'd like to be able to adjust the height, width, length, and amount of twist. The basic idea is a mold with a twisting pusher that fits inside. I need to be able to choose between a square, hex, octagonal, rectangle, rectangle with bevels, oval, and heart shape for the mold. It would be great if I could also choose to print all the parts at once or each part separately. If I print part-by-part I want to be able to choose which specific part I'm printing: the base, the pusher, the axis pusher, or the cap.

I also want the build plate to be configurable using the `build_plate.scad` file, as that's what I use right now. I need to be able to select between Replicator 2, Replicator, Thingomatic, or Manual build plates. If I choose "Manual", I need to set the X and Y dimensions.

Here are the parameters that I need:
*   `PartByPart`: string, options: "yes" or "no"
*   `Type`: string, options: "Square", "Hex", "Octagonal", "Rectangle", "RectangleBevel", "Oval", "Heart"
*   `PartOfObject`: string, options: "Base", "Pusher", "Axispusher", "Cap"
*   `build_plate_selector`: integer, options: 0, 1, 2, 3 (corresponding to Replicator 2, Replicator, Thingomatic, Manual)
*   `build_plate_manual_x`: integer, range: [100, 400]
*   `build_plate_manual_y`: integer, range: [100, 400]
*   `Height`: integer (mm)
*   `Width`: integer (mm)
*   `Length`: integer (mm), used for rectangle and oval shapes
*   `Twist`: integer
*   `RectangleBevelResoltuion`: integer

The mini-sandwich maker will have a base, a pusher, an axis for the pusher and a cap which closes the axis. The pusher should fit inside the base with a small tolerance so it can move and twist. The axis of the piston should follow the twist of the base. It should have a cylinder on the top to indicate the top of the Axis Pusher. The cap should be a sphere that fits on top of the axis.

Could you generate all the necessary OpenSCAD files for this? I expect it to use the `build_plate.scad` file and be parametric in the described way.

[Assistant]
Mini-Sandwich_Maker_Twist-EditionV1-Rudy_Ruffel.scad:
```
//
// ************* Credits part *************
//            "Mini-sandwich Maker Twist"
// Programmed by Rudy RUFFEL - Decembre 2014
// Optimized for Customizer makerbot
//
//********************** License ******************
//**        "Mini-sandwich_Maker-Twist" by rr2s        **
//**  is licensed under the Creative Commons     **
//** - Attribution - Non-Commercial license.     **
//*************************************************
//
// Buld plate selector

//
//
// ************* Declaration part *************
/* [Global] */

/* [Part] */
// (If you want part by part of mini-sandwich maker, or if you want to have mini-sandwich maker complete on your Bed. If you want part by part choose PartOfObject )
PartByPart = "no"; // [yes,no]
// (What type of Mini-sandwich Twist you want.)
Type = "Square"; // [Square:Square,Hex:Hex,Octagonal:Octagonal,Rectangle:Rectangle,RectangleBevel:Rectangle/Square Bevel,Oval:Oval,Heart:Heart]
// (Select the part you want to see. If you change the settings select all the parts with the same setting.)
PartOfObject = "Base";// [Base:Base,Pusher:Pusher,Axispusher:Axis pusher,Cap:Cap]

/* [build_plate] */
///////************************************************   Build - plate ****************************
// for use build_plate.scad you can see :
										// http://www.thingiverse.com/thing:44094/#files
use <utils/build_plate.scad>
//set your build plate
build_plate_selector = 0; //[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]

//if set to "manual" set the  build plate x dimension
build_plate_manual_x = 100; //[100:400]

//if set to "manual" set the  build plate y dimension
build_plate_manual_y = 100; //[100:400]

build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);
///////************************************************   Build - plate ****************************

/* [Settings] */
// (Height of your Mini-sandwich Twist in mm)
Height = 40;
// (The width of your Mini-sandwich Twist in mm. if it's a circle or oval this is the diameter.if it's Heart this is a size)
Width = 30;
// (The length of your Mini-sandwich Twist in mm. If it's Oval Length)
Length = 25;
// (The Twist)
Twist = 100;
// Resolution Bevel if you have choose Rectangle/Square Bevel
RectangleBevelResoltuion = 50;

/* [Hidden] */
	// ************* private variable *************
   // No change this variable. The code needs to be improved to use these variable.
	TP  = 5;//ThicknessPusher
	H   = Height+TP;
	W   = Width;
	L   = Length;
	TH  = 2 ; //ThicknessWall
	// other
	HAP = H+10;  //Height Axis Of Piston
	WAP = W/3.5; //Width Axis Of Piston or diametre if cinylinder or oval
	LAP = L/3.5; //Length Axis Of Piston
	RSB = RectangleBevelResoltuion;
	AxisOfpistonExtension= Twist*(HAP+TH-H+TH)/H+TH; // extension pistion for axis piston follow twist Base

// ************* Executable part *************
		Type_Part();
/////////////////////////**********************

// ************* Module part Piston *************
// Axis Piston Print
module AxisOfPistonCylinder(){
	difference(){
		//Base Cap
		union() {
			//base axis of piston
			difference(){
				translate([0,0,0])linear_extrude(H+TH,center=false,twist =Twist,$fn=1000)
				circle(WAP/2, WAP/2,$fn=4);
				translate([0,0,-WAP+1]) cube(WAP*2,center = true);
			}
			// axis of pistion extension
			rotate([0,0,-Twist ]) translate([0,0,H+TH-0.01])
			linear_extrude(HAP+TH-(H+TH),center=false,twist =AxisOfpistonExtension,$fn=1000)
			circle(WAP/2, WAP/2,$fn=4);
		}
		// Cylinder for indicate the top of the Axis Pusher
		translate([0,0,HAP+TH]) cylinder(0.5,WAP/2/10 , center=true,$fn=100);
	}

}

// Axis Piston Cut Base
module AxisOfPistonCylinderCutBase(){
		union() {
			//base axis of piston
			translate([0,0,0])linear_extrude(H+TH,center=false,twist =Twist,$fn=1000)
			circle(WAP/2+0.2, WAP/2+0.2,$fn=4);
			// axis of pistion extension
			rotate([0,0,-Twist ]) translate([0,0,H+TH-0.01])
			linear_extrude(HAP+TH-(H+TH),center=false,twist =AxisOfpistonExtension,$fn=1000)
			circle(WAP/2+0.2, WAP/2+0.2,$fn=4);
		}
}

// Cap of the piston Sphere
module CapPistionSphere(){
		translate([0,0,HAP+TH-W/3]) difference(){
				sphere(W/2,$fn=150);
				translate([0,0,-W/2]) cube(W,center=true);
				translate([0,W/2.2,W/2.2]) rotate([45,180, 0]) difference(){
								sphere(W/3,$fn=150);
								translate([0,0,-W/2]) cube(W,center=true);
								}
				translate([0,-W/2.2,W/2.2]) rotate([-45,180, 0]) difference(){
								sphere(W/3,$fn=150);
								translate([0,0,-W/2]) cube(W,center=true);
								}
		}
}

// ************* Module part For Square *************
module BaseSquare(){
	linear_extrude(height=H+TH,center=false,twist =Twist,$fn=1000) circle(r = W/2+TH*2,$fn=4);
}

module PusherSquare(){
	difference(){
		// Pusher
		translate([0,0,0]) linear_extrude(height=H+1,center=false,twist=Twist,$fn=1000)
		circle(r = W/2-(W/2/10),$fn=4);
		// cube cute Pusher
		translate([0,0,TP]) cylinder(H, W*2, W*2,$fn=4);
	}
}

module CutSquare(){
	translate([0,0,-1]) linear_extrude(height=H+1,center=false,twist=Twist,$fn=1000) circle(r = W/2,$fn=4);
}

module CutSquareAngle(){
	difference(){
		translate([0,0,-1]) linear_extrude(height=H+TH+2,center=false,twist=Twist,$fn=1000) circle(r = W/2+TH*3,$fn=4);
		translate([0,0,0])  linear_extrude(height=H+TH,scale=1.5,center=false,twist=Twist,$fn=1000) circle(r = W/2+TH/2,$fn=4);
	}
}

// ************* Module part For Hex *************
module BaseHex(){
	linear_extrude(height=H+TH,center=false,twist=Twist,$fn=1000) circle(r = W/2+TH*2,$fn=6);
}

module PusherHex(){
	difference(){
		// Pusher
		translate([0,0,0]) linear_extrude(height=H+1,center=false,twist=Twist,$fn=1000) circle(r = W/2-(W/2/10),$fn=6);
		// cube cute Pusher
		translate([0,0,TP]) cylinder(H, W*2, W*2,$fn=4);
	}
}

module CutHex(){
	translate([0,0,-1]) linear_extrude(height=H+1,center=false,twist=Twist,$fn=1000) circle(r = W/2,$fn=6);
}

module CutHexAngle(){
	difference(){
		translate([0,0,-1])linear_extrude(height=H+TH+2,center=false,twist=Twist,$fn=1000) circle(r = W/2+TH*3,$fn=6);
		translate([0,0,0]) linear_extrude(height=H+TH,scale=1.5,center=false,twist=Twist,$fn=1000) circle(r = W/2+TH/2,$fn=6);
	}
}

// ************* Module part For Octagonal *************
module BaseOctagonal(){
	linear_extrude(height=H+TH,center=false,twist=Twist,$fn=1000) circle(r = W/2+TH*2,$fn=8);
}

module PusherOctagonal(){
	difference(){
		// Pusher
		translate([0,0,0]) linear_extrude(height=H+1,center=false,twist=Twist,$fn=1000) circle(r = W/2-0.5,$fn=8);
		// cube cute Pusher
		translate([0,0,TP]) cylinder(H, W*2, W*2,$fn=8);
	}
}

module CutOctagonal(){
	translate([0,0,-1]) linear_extrude(height=H+1,center=false,twist=Twist,$fn=1000) circle(r = W/2,$fn=8);
}

module CutOctagonalAngle(){
	difference(){
		translate([0,0,-1]) linear_extrude(height=H+TH+2,center=false,twist= Twist,$fn=1000) circle(r = W/2+TH*3,$fn=8);
		translate([0,0,0]) linear_extrude(height=H+TH,scale=1.5,center=false,twist=Twist,$fn=1000) circle(r = W/2+TH/2,$fn=8);
	}
}

// ************* Module part For Rectangle *************
module BaseRectangle(){
	linear_extrude(height = H+TH,center = false, twist = Twist,$fn=1000) square([W+TH*2,L+TH*2],center=true);
}

module PusherRectangle(){
	difference(){
		// Pusher
		translate([0,0,0]) linear_extrude(height = H+1,center = false, twist = Twist,$fn=1000) square([W-1,L-1],center=true);
		// cube cute Pusher
		translate([0,0,TP]) cylinder(H, W*2, W*2,$fn=8);
	}
}

module CutRectangle(){
	translate([0,0,-1]) linear_extrude(height = H+1,center = false, twist = Twist,$fn=1000) square([W,L],center=true);
}

module CutRectangleAngle(){
	difference(){
		translate([0,0,-2]) linear_extrude(height = H+TH+2,scale=2,center = false, twist = Twist,$fn=1000)  square([W+TH*3,L+TH*3],center=true);
		translate([0,0,-2]) linear_extrude(height = H+TH+2,scale=1.5,center = false, twist = Twist,$fn=1000) square([W+TH/2,L+TH/2],center=true);
	}
}

// ************* Module part For RectangleBevel************
module BaseRectangleBevel(){
	translate([0,0,0]) linear_extrude(height = H+TH,center = false, twist = Twist,$fn=500)
	minkowski(){
		square([W+TH*2-5,L+TH*2-5],center=true);
		circle(r=10,2,$fn = 50);
	}
}

module PusherRectangleBevel(){
	difference(){
		// Pusher
		translate([0,0,0]) linear_extrude(height = H+1,center = false, twist =Twist,$fn=500)
		minkowski(){
			square([W-6,L+-6],center=true);
			circle(r=9,1.5,$fn = RSB);
		}
		// cube cute Pusher
		translate([0,0,TP]) cylinder(H, W*2, W*2,$fn=4);
	}

}

module CutRectangleBevel(){
	translate([0,0,-1]) linear_extrude(height = H+1,center = false, twist = Twist,$fn=500)
	minkowski(){
		square([W-5,L+-5],center=true);
		circle(r=10,2,$fn = RSB);
	}
}

module CutRectangleBevelAngle(){
	difference(){
		// Base Angle
			translate([0,0,-H/2+-TH+-1])
			translate([0,0,-1]) linear_extrude(height = H+TH+2,scale=2,center = false, twist = Twist,$fn=200)
		minkowski(){
			square([W+TH*3-5,L+TH*3-5],center=true);
			circle(r=10,2,$fn = 50);
		}
		// Cut Base Angle
			translate([0,0,0]) linear_extrude(height = H+TH,scale=1.5,center = false, twist =Twist,$fn=500)
		minkowski(){
			square([W+TH-5,L+TH-5],center=true);
			circle(r=10,2,$fn = 50);
		}
	}

}

// ************* Module part For Oval *************
module BaseOval(){
	linear_extrude(height = H+TH,center = false, twist = Twist,$fn=500)
		hull(){
			translate([0,-L/4,-H/2]) circle(W/2.5+TH, W/2.5+TH,$fn=50);
			translate([0,L/4,-H/2]) circle(W/2.5+TH, W/2.5+TH,$fn=50);
		}
}

module PusherOval(){
	difference(){
		// Pusher
		translate([0,0,0]) linear_extrude(height = H+1,center = false, twist = Twist,$fn=500)
		hull(){
			translate([0,-L/4,-H/2]) circle((W/2.5)-0.5, W/3,$fn=50);
			translate([0,L/4,-H/2]) circle((W/2.5)-0.5, W/3,$fn=50);
		}
		// cube cute Pusher
		translate([0,0,TP]) cylinder(H, W*2, W*2,$fn=4);
	}
}

module CutOval(){
translate([0,0,-1]) linear_extrude(height = H+1,center = false, twist = Twist,$fn=500)
	hull(){
		translate([0,-L/4,-H/2]) circle(W/2.5, W/2.5,$fn=50);
		translate([0,L/4,-H/2]) circle(W/2.5, W/2.5,$fn=50);
	}
}

module CutOvalAngle(){
	difference(){
		// Base for angle
		translate([0,0,-1]) linear_extrude(height = H+TH+1,scale=2,center = false, twist = Twist,$fn=500)
			hull(){
				translate([0,-L/4,-H/2]) circle(W/2.5+TH, W/2.5+TH,$fn=50);
				translate([0,L/4,-H/2]) circle(W/2.5+TH, W/2.5+TH,$fn=50);
			}
		//Cut for Base Angle
		translate([0,0,-1]) linear_extrude(height = H+TH+1,scale=1.5,center = false, twist = Twist,$fn=500)
			hull(){
				translate([0,-L/4,-H/2]) circle(W/2.5+TH/3, W/2.5+TH/3,$fn=50);
				translate([0,L/4,-H/2]) circle(W/2.5+TH/3, W/2.5+TH/3,$fn=50);
			}
	}
}

// ************* Module part For Heart ************
module BaseHeart1(){
	translate ([-W/1.7+-TH,-W/1.7+-TH,0]) union (){
			square (W+TH,W+TH);
			translate ([W/2+TH,W+TH,0]) circle(W/2+TH,$fn=50);
			translate ([W+TH,W/2+TH,0]) circle(W/2+TH,$fn=50);
			}
}
module BaseHeart(){
	translate ([0,0,0])  linear_extrude(height = H+TH,center = false, twist = Twist,$fn=500) BaseHeart1();
}

module PusherHeart(){
	difference(){
		// Pusher
		translate ([0,0,0])  linear_extrude(height = H+TH,center = false, twist = Twist,$fn=500) PusherHeart1();
		// cube cute Pusher
		rotate([0,0,0]) translate([0,0,TP]) cylinder(H, W*2, W*2,$fn=4);
	}
}
module PusherHeart1(){
	translate ([-W/1.7,-W/1.7,0]) union (){
		square (W-1,W-1);
		translate ([(W-1)/2,W-1,0]) circle((W-1)/2,$fn=50);
		translate ([W-1,(W-1)/2,0]) circle((W-1)/2,$fn=50);
		}
}

module CutHeart1(){
	translate ([-W/1.7,-W/1.7,0]) union (){
			square (W,W);
			translate ([W/2,W,0]) circle(W/2,$fn=50);
			translate ([W,W/2,0]) circle(W/2,$fn=50);
		}

}
module CutHeart(){
	translate ([0,0,-1])  linear_extrude(height = H+1,center = false, twist = Twist,$fn=500) CutHeart1();
}

module CutHeartAngle(){
	difference(){
	translate ([0,0,-0.1]) linear_extrude(height = H+TH,scale=2,center = false, twist = Twist,$fn=500) BaseHeartAngle1();
	translate ([0,0,-0.1]) linear_extrude(height = H+TH,scale=1.5,center = false, twist = Twist,$fn=500) CutHeartAngle2();
	}
}

module BaseHeartAngle1(){
	translate ([-W/1.5+-TH,-W/1.5+-TH,H+TH])
			union (){
			square (W+TH+3,W+TH+3);
			translate ([(W+3)/2+TH,W+TH+3,0]) circle((W+3)/2+TH,$fn=50);
			translate ([W+TH+3,(W+3)/2+TH,0]) circle((W+3)/2+TH,$fn=50);
		}
}

module CutHeartAngle2(){
		translate ([-W/1.7+-TH/2,-W/1.7+-TH/2,0]) union (){
			square (W+TH/2,W+TH/2);
			translate ([W/2+TH/2,W+TH/2,0]) circle(W/2+TH/2,$fn=50);
			translate ([W+TH/2,W/2+TH/2,0]) circle(W/2+TH/2,$fn=50);
		}
}

// ************* Type part *************

module Type_Part() {

// if all part for mini sandwich
	if(PartByPart == "no") {
	// For the Square
			if (Type == "Square") {
						// Square Base
						translate([0,0,H+TH]) rotate([180,0,0])
						difference(){
									BaseSquare();
									AxisOfPistonCylinderCutBase();
									CutSquare();
									CutSquareAngle();
						}
						// Pusher Square
						translate([W*1.2,0,0]) difference(){
									PusherSquare();
									AxisOfPistonCylinder();
						}
						// Axis Piston
						translate([0,-W*1.2,-1])AxisOfPistonCylinder();
						//cap
						translate([-W*1.2,0,-(HAP+TH-W/3)])difference(){
									CapPistionSphere();
									AxisOfPistonCylinder();
						}

		// For the Hex
			}else if (Type == "Hex") {
					// Base Hex
					translate([0,0,H+TH]) rotate([180,0,0]) difference(){
									BaseHex();
									AxisOfPistonCylinderCutBase();
									CutHex();
									CutHexAngle();
						}
					// Pusher Hex
					translate([W*1.2,0,0]) difference(){
									PusherHex();
									AxisOfPistonCylinder();
						}
					// Axis Piston
					translate([0,-W*1.2,-1])AxisOfPistonCylinder();
					//cap
						translate([-W*1.2,0,-(HAP+TH-W/3)])difference(){
									CapPistionSphere();
									AxisOfPistonCylinder();
						}

		// For the Octogonal
			}else if (Type == "Octagonal") {
						// Base Octagonal
						translate([0,0,H+TH]) rotate([180,0,0])difference(){
							BaseOctagonal();
							AxisOfPistonCylinderCutBase();
							CutOctagonal();
							CutOctagonalAngle();
						}
						// Pusher Octagonal
						translate([W*1.2,0,0]) difference(){
							PusherOctagonal();
							AxisOfPistonCylinder();
						}
						// Axis
						translate([0,-W*1.2,-1]) AxisOfPistonCylinder();
						//cap
						translate([-W*1.2,0,-(HAP+TH-W/3)]) difference(){
							CapPistionSphere();
							AxisOfPistonCylinder();
						}

		// For the Rectangle
			}else if (Type == "Rectangle") {
						//Base Rectangle
						translate([0,0,H+TH]) rotate([180,0,0])difference(){
							BaseRectangle();
							AxisOfPistonCylinderCutBase();
							CutRectangle();
							CutRectangleAngle();
						}
						// Pusher Rectangle
						translate([W*1.2,0,0]) difference(){
							PusherRectangle();
							AxisOfPistonCylinder();
						}
						// Axis
						translate([0,-W*1.2,-1]) AxisOfPistonCylinder();
						//cap
						translate([-W*1.2,0,-(HAP+TH-W/3)]) difference(){
							CapPistionSphere();
							AxisOfPistonCylinder();
							}

		// For the Rectangle Bevel
			}else if (Type == "RectangleBevel") {
						//Base RectangleBevel
						translate([0,0,H+TH]) rotate([180,0,0])difference(){
							BaseRectangleBevel();
							AxisOfPistonCylinderCutBase();
							CutRectangleBevel();
							CutRectangleBevelAngle();
						}
						// Pusher RectangleBevel
						translate([W*1.2,0,0])difference(){
							PusherRectangleBevel();
							AxisOfPistonCylinder();
						}
						//	Axis
						translate([0,-W*1.2,-1]) AxisOfPistonCylinder();
						//cap
						translate([-W*1.2,0,-(HAP+TH-W/3)]) difference(){
							CapPistionSphere();
							AxisOfPistonCylinder();
						}

		// For the Oval
			}else if (Type == "Oval") {
						translate([0,0,H+TH]) rotate([180,0,0])difference(){
							BaseOval();
							AxisOfPistonCylinderCutBase();
							CutOval();
							CutOvalAngle();
						}

						translate([W*1.2,0,0]) difference(){
							PusherOval();
							AxisOfPistonCylinder();
						}
						translate([0,-W*1.2,-1]) AxisOfPistonCylinder();
						//cap
						translate([-W*1.2,0,-(HAP+TH-W/3)]) difference(){
							CapPistionSphere();
							AxisOfPistonCylinder();
						}
		// For the Heart
			}else {
						// Base Heart
						translate([0,0,H+TH]) rotate([180,0,120]) difference(){
							BaseHeart();
							AxisOfPistonCylinderCutBase();
							CutHeart();
							CutHeartAngle();
						}
						//Pusher Heart
						rotate([0,0,50]) translate([W*1.7,0,0]) difference(){
							PusherHeart();
							AxisOfPistonCylinder();
						}
						// axis
						translate([0,-W*1.5,-1])AxisOfPistonCylinder();
						//cap
						translate([-W*1.7,0,-(HAP+TH-W/3)]) difference(){
							CapPistionSphere();
							AxisOfPistonCylinder();
						}
			}

//********* if part by part for mini sandwich
	}else{
		// For the Square
			if (Type == "Square") {
				if (PartOfObject  == "Base"){
						translate([0,0,H+TH]) rotate([180,0,0])
						difference(){
							BaseSquare();
							AxisOfPistonCylinderCutBase();
							CutSquare();
							CutSquareAngle();
						}
				}else if (PartOfObject  == "Pusher") {
						difference(){
							PusherSquare();
							AxisOfPistonCylinder();
						}
				}else if (PartOfObject  == "Axispusher") {
					translate([0,0,-1]) AxisOfPistonCylinder();
				}else{//cap
					translate([0,0,-(HAP+TH-W/3)]) difference(){
								CapPistionSphere();
								AxisOfPistonCylinder();
							}
				}

		// For the Hex
			}else if (Type == "Hex") {
				if (PartOfObject  == "Base"){
						translate([0,0,H+TH]) rotate([180,0,0])
						difference(){
							BaseHex();
							AxisOfPistonCylinderCutBase();
							CutHex();
							CutHexAngle();
						}
				}else if (PartOfObject  == "Pusher") {
						difference(){
							PusherHex();
							AxisOfPistonCylinder();
						}
				}else if (PartOfObject  == "Axispusher") {
						translate([0,0,-1]) AxisOfPistonCylinder();
				}else{//cap
						translate([0,0,-(HAP+TH-W/3)]) difference(){
								CapPistionSphere();
								AxisOfPistonCylinder();
							}
				}

		// For the Octagonal
			}else if (Type == "Octagonal") {
				if (PartOfObject  == "Base"){
						translate([0,0,H+TH]) rotate([180,0,0])
						difference(){
							BaseOctagonal();
							AxisOfPistonCylinderCutBase();
							CutOctagonal();
							CutOctagonalAngle();
						}
				}else if (PartOfObject  == "Pusher") {
						difference(){
							PusherOctagonal();
							AxisOfPistonCylinder();
						}
				}else if (PartOfObject  == "Axispusher") {
					translate([0,0,-1]) AxisOfPistonCylinder();
				}else{//cap
					translate([0,0,-(HAP+TH-W/3)]) difference(){
								CapPistionSphere();
								AxisOfPistonCylinder();
							}
				}

		// For the Rectangle
			}else if (Type == "Rectangle") {
				if (PartOfObject  == "Base"){
						translate([0,0,H+TH]) rotate([180,0,0])
						difference(){
							BaseRectangle();
							AxisOfPistonCylinderCutBase();
							CutRectangle();
							CutRectangleAngle();
						}
				}else if (PartOfObject  == "Pusher") {
						difference(){
							PusherRectangle();
							AxisOfPistonCylinder();
						}
				}else if (PartOfObject  == "Axispusher") {
					translate([0,0,-1]) AxisOfPistonCylinder();
				}else{//cap
					translate([0,0,-(HAP+TH-W/3)]) difference(){
								CapPistionSphere();
								AxisOfPistonCylinder();
							}
				}

		// For the Rectangle Bevel
			}else if (Type == "RectangleBevel") {
				if (PartOfObject  == "Base"){
						translate([0,0,H+TH]) rotate([180,0,0])
						difference(){
							BaseRectangleBevel();
							AxisOfPistonCylinderCutBase();
							CutRectangleBevel();
							CutRectangleBevelAngle();
						}
				}else if (PartOfObject  == "Pusher") {
						difference(){
							PusherRectangleBevel();
							AxisOfPistonCylinder();
						}
				}else if (PartOfObject  == "Axispusher") {
					translate([0,0,-1]) AxisOfPistonCylinder();
				}else{//cap
					translate([0,0,-(HAP+TH-W/3)]) difference(){
								CapPistionSphere();
								AxisOfPistonCylinder();
							}
				}

		// For the Oval
			}else if (Type == "Oval") {
				if (PartOfObject  == "Base"){
						translate([0,0,H+TH]) rotate([180,0,0])
						difference(){
							BaseOval();
							AxisOfPistonCylinderCutBase();
							CutOval();
							CutOvalAngle();
						}
				}else if (PartOfObject  == "Pusher") {
						difference(){
							PusherOval();
							AxisOfPistonCylinder();
						}
				}else if (PartOfObject  == "Axispusher") {
					translate([0,0,-1]) AxisOfPistonCylinder();
				}else{//cap
					translate([0,0,-(HAP+TH-W/3)]) difference(){
								CapPistionSphere();
								AxisOfPistonCylinder();
							}
				}

		// For the Heart
			}else {// For the Heart
				if (PartOfObject  == "Base"){
						translate([0,0,H+TH]) rotate([180,0,0])
						difference(){
							BaseHeart();
							AxisOfPistonCylinderCutBase();
							CutHeart();
							CutHeartAngle();
						}
				}else if (PartOfObject  == "Pusher") {
						difference(){
							PusherHeart();
							AxisOfPistonCylinder();
						}
				}else if (PartOfObject  == "Axispusher") {
					translate([0,0,-1]) AxisOfPistonCylinder();
				}else{//cap
					translate([0,0,-(HAP+TH-W/3)]) difference(){
								CapPistionSphere();
								AxisOfPistonCylinder();
							}
				}

			}
		}
}

```


[User]
I'm looking to create a customizable 3D model of a rounded rectangular prism with a hollow interior. The basic shape should be a rectangular prism where the vertical edges are filleted, essentially rounded cylinders. I'd like to be able to control the following parameters:

*   **length:** The length of the rectangle along its longer axis.
*   **width:** The width of the rectangle along its shorter axis.
*   **height:** The height of the entire prism.
*   **radius:** The radius of the cylindrical fillets at the corners.
*   **wallthickness:** The thickness of the wall of the hollow interior.

Essentially I want to be able to easily change the overall dimensions, the roundness of the edges and the thickness of the walls. I don't want to have to edit any geometry directly - just the parameters. Could you help me write that in OpenSCAD? I think I should be able to handle a single file for this.

[Assistant]
Square_Rounded.scad:
```
// variables
length = 20; // [10:400]
width = 10; // [10:400]
height = 30; // [1:400]
radius = 2; // [2:31]
wallthickness = 1; // [1:30]
// model
difference(){
	hull(){
		translate([(length-2*radius)/2,(width-2*radius)/2,0]) cylinder(h=height,d=2*radius,center=true,$fn=100);
		translate([-(length-2*radius)/2,(width-2*radius)/2,0]) cylinder(h=height,d=2*radius,center=true,$fn=100);
		translate([(length-2*radius)/2,-(width-2*radius)/2,0]) cylinder(h=height,d=2*radius,center=true,$fn=100);
		translate([-(length-2*radius)/2,-(width-2*radius)/2,0]) cylinder(h=height,d=2*radius,center=true,$fn=100);
	}
	hull(){
		translate([(length-2*radius)/2,(width-2*radius)/2,0]) cylinder(h=height,d=2*(radius-wallthickness),center=true,$fn=100);
		translate([-(length-2*radius)/2,(width-2*radius)/2,0]) cylinder(h=height,d=2*(radius-wallthickness),center=true,$fn=100);
		translate([(length-2*radius)/2,-(width-2*radius)/2,0]) cylinder(h=height,d=2*(radius-wallthickness),center=true,$fn=100);
		translate([-(length-2*radius)/2,-(width-2*radius)/2,0]) cylinder(h=height,d=2*(radius-wallthickness),center=true,$fn=100);
	}
}

```


[User]
I need a parametric design for a kind of modular profile, like for building a frame or structure. I've attached the SCAD code I've been playing with, which is called `Profil_4_Double_All.scad`. It produces a single unit, a kind of rotated 'plus' shape with some cutouts and a central core. The important parameters I want to control are the overall `height` of the profile and a `size` parameter that controls the scaling of the individual elements. I'd like to keep the `size` option limited to 4, 6, and 8, as I did in my file.

The core is made by rotating the main profile by 90 degrees and repeating that, so there are always 4 copies, and then that whole thing is rotated in the z-axis again to create a second similar profile and they're all combined together.  The base unit's profile is created from intersecting some cylinders and cubes, using `hull()` and `difference()`. It has some small cutouts made from similar shapes. There are also some mirrored cutouts.  And finally, I have a central, rectangular block at the end of the profile.

I need the code to be parametric so I can modify those two parameters - `height` and `size`, and for the size to be limited to those 3 values using a drop-down menu. Can you design something like this for me? I don't need any additional library files or anything, just the one .scad file.

[Assistant]
Profil_4_Double_All.scad:
```
// variables
height = 30; // [1:400]
size = 4; // [4,6,8]
// calculations
s = size/8;
// model
union(){
for (z = [1, 2])
{
rotate([0,0,90*z]) translate([-15*s,-15*s,0]) scale([s,s,1]) union(){
for (z = [1, 2, 3, 4])
{
	rotate([0,0,90*z]) translate([-15,-15,0]) difference(){
		hull(){
			translate([3,3,0]) cylinder(h=height,r=3,$fn=100);
			translate([9,0,0]) cube([6,6,height]);
			translate([9,9,0]) cube([6,6,height]);
			translate([0,9,0]) cube([6,6,height]);
		}
		hull(){
			translate([7.85,3.3,0]) cylinder(h=height,r=1.3,$fn=100);
			translate([14,2,0]) cube([1,1,height]);
			translate([13.54,8,0]) cylinder(h=height,r=2,$fn=100);
			translate([14,9,0]) cube([1,1,height]);
		}
		hull(){
			translate([11,0,0]) cube([2,2,height]);
			translate([13,0,0]) cube([2,2,height]);
		}
		mirror([5,-5,0]) hull(){
			translate([7.85,3.3,0]) cylinder(h=height,r=1.3,$fn=100);
			translate([14,2,0]) cube([1,1,height]);
			translate([13.54,8,0]) cylinder(h=height,r=2,$fn=100);
			translate([14,9,0]) cube([1,1,height]);
		}
		mirror([5,-5,0]) hull(){
			translate([11,-0.5,0]) cube([3,3,height]);
			translate([13,-0.5,0]) cube([3,3,height]);
		}
		translate([15,15,0]) cylinder(h=height,r=3.4,$fn=100);
	}
}
}
}
	translate([11*s,-2*s,0]) cube([8*s,4*s,height]);
}
```


[User]
I'm looking for a customizable profile system, something like a structural component that can be scaled and adjusted to different sizes. I have this basic design in mind, it's sort of a quarter-circle with a bunch of cutouts and extrusions, and I want to make it parametric so I can use it in a bunch of different projects.

I've attached a sample .scad file to give you a general idea, but please don't try to work *from* that file, because it's a mess of scaled transformations. I'd prefer you generate clean, parametric code from scratch.

Specifically, I want to be able to adjust these parameters:

*   **`height`**: The overall height of the profile. I'd like a range from, say, 1 to 400.
*   **`size`**: A kind of overall scale factor that changes the dimensions of the whole profile in the X and Y directions. I was thinking of having it be able to take on a few specific values, like 4, 6, and 8, but you can make it continuous if that's easier. I'm also thinking that this scaling would be separate from the height scaling to allow for more independent control.

The profile, as I envision it, has four identical "arms" rotated around a central point. Each arm should start with an initial quarter-circle shape. Then, I want several shapes and cutouts to be subtracted, and for all of this to scale together.

In more detail, each of the "arms" has these components:

*   A base shape made of a combination of cylinders and cubes.
*   Two sets of rounded-corner cutouts that look like they were made using hulls with smaller cylinders and cubes.
*   A central cutout, also made of hulls with small cylinders and cubes, and a few mirrored copies.
*   A larger circle cutout toward the end.
*   Some added rectangular extrusions for structural integrity, that stick out from the corner.

Finally, the entire model has a cylindrical cutout in the center. The diameter of this cylinder must be scaled along with the 'size' parameter as well.

Could you generate an OpenSCAD file for this, with well-commented code and using modules to help with readability? I'm not worried about performance or efficiency, this doesn't need to be optimized. I'd like to be able to tweak all of these dimensions and have them update correctly.

[Assistant]
Profil_4_Quatruple.scad:
```
// variables
height = 30; // [1:400]
size = 4; // [4,6,8]
// calculations
s = size/8;
// model
difference(){
for (z = [1, 2, 3, 4])
{
rotate([0,0,90*z]) translate([-15*s,-15*s,0]) scale([s,s,1]) union(){
for (z = [1, 2, 3, 4])
{
	rotate([0,0,90*z]) translate([-15,-15,0]) difference(){
		hull(){
			translate([3,3,0]) cylinder(h=height,r=3,$fn=100);
			translate([9,0,0]) cube([6,6,height]);
			translate([9,9,0]) cube([6,6,height]);
			translate([0,9,0]) cube([6,6,height]);
		}
		hull(){
			translate([7.85,3.3,0]) cylinder(h=height,r=1.3,$fn=100);
			translate([14,2,0]) cube([1,1,height]);
			translate([13.54,8,0]) cylinder(h=height,r=2,$fn=100);
			translate([14,9,0]) cube([1,1,height]);
		}
		hull(){
			translate([11,0,0]) cube([2,2,height]);
			translate([13,0,0]) cube([2,2,height]);
		}
		mirror([5,-5,0]) hull(){
			translate([7.85,3.3,0]) cylinder(h=height,r=1.3,$fn=100);
			translate([14,2,0]) cube([1,1,height]);
			translate([13.54,8,0]) cylinder(h=height,r=2,$fn=100);
			translate([14,9,0]) cube([1,1,height]);
		}
		mirror([5,-5,0]) hull(){
			translate([11,-0.5,0]) cube([3,3,height]);
			translate([13,-0.5,0]) cube([3,3,height]);
		}
		translate([15,15,0]) cylinder(h=height,r=3.4,$fn=100);
	}
}
	translate([13,-4,0]) cube([2,8,height]);
	rotate([0,0,90]) translate([13,-4,0]) cube([2,8,height]);
}
}
	cylinder(h=height,r=3.4*s,$fn=100);
}
```


[User]
I'd like a parametric OpenSCAD file that generates a kind of double-profile shape. It should be based on the attached file `Profil_4_Double.scad`, but it needs to be more flexible.

Specifically, the current design has a core shape that's rotated and mirrored, then those are scaled and duplicated. I want to be able to adjust several parameters:

*   **`height`**: The overall height of the profile. This is currently a simple linear extrusion.
*   **`size`**: A base size parameter that everything else scales relative to. This needs to control the overall scale of the shape before it is rotated and duplicated.
*   **`core_width`**: The width of the main core of the profile, which is a central rectangular shape with a complex cutout on each side.
*   **`core_depth`**: The depth of the main core of the profile, orthogonal to the core_width and height. This also defines the depth of the cutouts.
*   **`cutout_radius_1`**: The radius of the first cylindrical cutout. There are two of these on each side of the core.
*   **`cutout_radius_2`**: The radius of the second cylindrical cutout. These are larger, but not the first and second cutouts are not aligned.
*   **`cutout_offset_1`**: The offset of the first cylindrical cutout from the edge of the core. There is one along each axis.
*   **`cutout_offset_2`**: The offset of the second cylindrical cutout from the edge of the core. These are offset differently.
*   **`cutout_rect_size`**: The size of the rectangular cutouts, which are small and placed near the cylindrical cutouts.
*   **`outer_radius`**: The radius of the outer cylinders.

Additionally, instead of just having two copies of this profile, I want to be able to set a `profile_count` parameter that determines how many copies there are. These will be spaced equally around a circle.

I also need to have the two vertical bars at the end of the profile also be fully parametric. That is, I'd like to control both their width (`bar_width`), and the distance from the center of the profile to the closest edge of the bars (`bar_offset`).

I'd like all of this generated in a single .scad file, and I don't need any specific libraries.

[Assistant]
Profil_4_Double.scad:
```
// variables
height = 30; // [1:400]
size = 8; // [4,6,8]
// calculations
s = size/8;
// model
for (z = [1, 2])
{
rotate([0,0,90*z]) translate([-15*s,-15*s,0]) scale([s,s,1]) union(){
for (z = [1, 2, 3, 4])
{
	rotate([0,0,90*z]) translate([-15,-15,0]) difference(){
		hull(){
			translate([3,3,0]) cylinder(h=height,r=3,$fn=100);
			translate([9,0,0]) cube([6,6,height]);
			translate([9,9,0]) cube([6,6,height]);
			translate([0,9,0]) cube([6,6,height]);
		}
		hull(){
			translate([7.85,3.3,0]) cylinder(h=height,r=1.3,$fn=100);
			translate([14,2,0]) cube([1,1,height]);
			translate([13.54,8,0]) cylinder(h=height,r=2,$fn=100);
			translate([14,9,0]) cube([1,1,height]);
		}
		hull(){
			translate([11,0,0]) cube([2,2,height]);
			translate([13,0,0]) cube([2,2,height]);
		}
		mirror([5,-5,0]) hull(){
			translate([7.85,3.3,0]) cylinder(h=height,r=1.3,$fn=100);
			translate([14,2,0]) cube([1,1,height]);
			translate([13.54,8,0]) cylinder(h=height,r=2,$fn=100);
			translate([14,9,0]) cube([1,1,height]);
		}
		mirror([5,-5,0]) hull(){
			translate([11,-0.5,0]) cube([3,3,height]);
			translate([13,-0.5,0]) cube([3,3,height]);
		}
		translate([15,15,0]) cylinder(h=height,r=3.4,$fn=100);
	}
}
	translate([13,-4,0]) cube([2,8,height]);
	rotate([0,0,90]) translate([13,-4,0]) cube([2,8,height]);
}
	 translate([0,-3*s,0]) cube([6*s,6*s,height]);
}
```


[User]
I'm trying to design a modular system of profiles that can be connected together, and I want to start with a few different profile shapes. I have one profile in mind, which I've attached as `Profil_4_Middle.scad`. I want the system to be parametric so I can easily adjust dimensions and other properties.

Could you create the OpenSCAD files to achieve this? I am imagining something that can be extended by the user. I would like the system to have at least these things:
1.  A variable for the overall `height` of the profile.
2.  A variable for the `size` of the profile, which will be used to scale the entire object. The profile will be constructed from a unit block of size 8, which I would like to see parameterized.
3. The ability to select from several profile shapes, including the one defined in `Profil_4_Middle.scad`. Let's call this Profile Type 4.
4. The ability to use a profile in the middle of a shape, an outer edge, and an inner edge. I want these to be defined as separate types of profiles which should be able to be mixed and matched freely. I need the "middle" type to connect to other middle profiles on all four sides; the "outer" edge to connect to other outer edges on the outside and middle profiles on the inside edge; and the "inner" edge to connect to itself or other inner edges only.
5. The ability to choose a different number of repetitions for the profiles. For example, I should be able to create a 1x3 profile block, where the 1 is the repetitions on the X axis, and the 3 is the repetitions on the Y axis.

I'm open to suggestions for how to best organize the code or additional features you think would be useful. I'm not super familiar with OpenSCAD, so if there are any library dependencies please specify them.

[Assistant]
Profil_4_Middle.scad:
```
// variables
height = 30; // [1:400]
size = 8; // [4,6,8]
// calculations
s = size/8;
// model
scale([s,s,1]) union(){
for (z = [1, 2, 3, 4])
{
	rotate([0,0,90*z]) translate([-15,-15,0]) difference(){
		hull(){
			translate([3,3,0]) cylinder(h=height,r=3,$fn=100);
			translate([9,0,0]) cube([6,6,height]);
			translate([9,9,0]) cube([6,6,height]);
			translate([0,9,0]) cube([6,6,height]);
		}
		hull(){
			translate([7.85,3.3,0]) cylinder(h=height,r=1.3,$fn=100);
			translate([14,2,0]) cube([1,1,height]);
			translate([13.54,8,0]) cylinder(h=height,r=2,$fn=100);
			translate([14,9,0]) cube([1,1,height]);
		}
		hull(){
			translate([11,0,0]) cube([2,2,height]);
			translate([13,0,0]) cube([2,2,height]);
		}
		mirror([5,-5,0]) hull(){
			translate([7.85,3.3,0]) cylinder(h=height,r=1.3,$fn=100);
			translate([14,2,0]) cube([1,1,height]);
			translate([13.54,8,0]) cylinder(h=height,r=2,$fn=100);
			translate([14,9,0]) cube([1,1,height]);
		}
		mirror([5,-5,0]) hull(){
			translate([11,-0.5,0]) cube([3,3,height]);
			translate([13,-0.5,0]) cube([3,3,height]);
		}
		translate([15,15,0]) cylinder(h=height,r=3.4,$fn=100);
	}
}
	translate([13,-4,0]) cube([2,8,height]);
}
```