[User]
Hey, I'm looking to design a mount for my GoPro gimbal that I can attach to my bike helmet. I have a basic design in mind but I'd like to make it parametric so I can easily adjust it for different helmet shapes and gimbal sizes.

Here's a breakdown of what I need:

**Helmet Interface:**

*   The mount needs to conform to the curvature of my helmet. I can approximate this with two radii: `helmet_x_rad` for the horizontal curve and `helmet_y_rad` for the vertical curve. I'd like to be able to adjust these, with reasonable ranges from 75 to 200 mm.
*   The mount should have "wings" extending out from the main clamp area to provide a larger surface for attaching to the helmet. I'll call this `helmet_wings` and it should be adjustable from 0 to 50 mm.

**Gimbal Interface:**

*   The gimbal has a cylindrical battery holder bar that I need to clamp onto. Its diameter is adjustable via the `gimbal_bar_diam` parameter (15 to 50 mm).
*   I need to define the length of the bar that the clamp will grab using `mount_length` which should vary between 40 and 80 mm.
*   I need the mount to position the gimbal bar at an angle, defined by `clamp_angle` (0 to 45 degrees).

**Clamp Mechanism:**

*   The clamp should have a wall thickness of `clamp_wall` that should be adjustable (2 to 5 mm).
*   It should use a screw to tighten, sized by a `clamp_screw` variable, accepting values like 2, 2.5, 3, or 4 (in millimeters, this will be for the screw radius).
*   The screw will pass through tabs that extend out from the clamp, controlled by the `clamp_tabs` parameter, which should be adjustable from 7.5 to 15 mm.

I'd like the design to be in OpenSCAD and for it to be fully parametric, incorporating all of the parameters I've described. The goal is a mount that securely holds my gimbal on my helmet. I don't have any preference as to how the helmet interface is generated or what shapes are used, as long as the helmet_x_rad and helmet_y_rad approximate that interface. I would also like the screw hole to be generated based on the clamp_screw parameter for easy adjustment for different sized screws. Could you help me with that? I would prefer if you made full use of the BOSL library rather than rolling my own primitives. Thank you!

[Assistant]
GoProGimbalMount.scad:
```
/* [Helmet] */

// The radius of the horizontal curve of the helmet at the mount point.
helmet_x_rad    = 100;  // [75:200]

// The radius of the vertical curve of the helmet at the mount point.
helmet_y_rad    = 100;  // [75:200]

// The width of the wings for mounting to the helmet.
helmet_wings    =  20;  // [0:50]

/* [Gimbal] */

// The diameter of the gimbal's battery holder bar.
gimbal_bar_diam =  25.5;  // [15:50]

// Length of the gimbal bar to grip.
mount_length    =  60;  // [40:80]

// Angle from vertical that the gimbal bar should be held.
clamp_angle     =  15;  // [0:45]

/* [Clamp] */

// Thickness of the clamp wall.
clamp_wall      =   3;  // [2:5]

// Size of the screws to tighten the clamp with.
clamp_screw     =   3;  // [2,2.5,3,4]

// Size of tabs that the screws go in.
clamp_tabs      =  10;  // [7.5:15]

//////////////////////////////////////////////////
// Belfry SCAD Library

module right(x) {translate([+x,0,0]) children();}
module left(x)  {translate([-x,0,0]) children();}
module back(y)  {translate([0,+y,0]) children();}
module fwd(y)   {translate([0,-y,0]) children();}
module up(z)    {translate([0,0,+z]) children();}
module down(z)  {translate([0,0,-z]) children();}

module xrot(x) {rotate([x,0,0]) children();}
module yrot(y) {rotate([0,y,0]) children();}
module zrot(z) {rotate([0,0,z]) children();}

module xscale(x) {scale([x,1,1]) children();}
module yscale(y) {scale([1,y,1]) children();}
module zscale(z) {scale([1,1,z]) children();}

module mirror_copy(v) {children(); mirror(v) children();}
module place_copies(a=[[0,0,0]]) {for (p = a) translate(p) children();}
module xrot_copies(rots=[0]) {for (r = rots) rotate([r, 0, 0]) children();}
module yrot_copies(rots=[0]) {for (r = rots) rotate([0, r, 0]) children();}
module zrot_copies(rots=[0]) {for (r = rots) rotate([0, 0, r]) children();}

module xspread(spacing=1,n=2) {off=spacing*(n-1)/2.0; for (x =[-off:spacing:off]) translate([x, 0, 0]) children();}
module yspread(spacing=1,n=2) {off=spacing*(n-1)/2.0; for (y =[-off:spacing:off]) translate([0, y, 0]) children();}
module zspread(spacing=1,n=2) {off=spacing*(n-1)/2.0; for (z =[-off:spacing:off]) translate([0, 0, z]) children();}
module spread(p1,p2,n=2) {d=(p2-p1)/(n-1); for (i=[0:n-1]) translate(p1+d*i) children();}

module xrot_spread(n=2,r=0) {d=360.0/n; for (a=[d:d:360]) rotate([a%360,0,0]) translate([0,r,0]) children();}
module yrot_spread(n=2,r=0) {d=360.0/n; for (a=[d:d:360]) rotate([0,a%360,0]) translate([r,0,0]) children();}
module zrot_spread(n=2,r=0) {d=360.0/n; for (a=[d:d:360]) rotate([0,0,a%360]) translate([r,0,0]) children();}

//////////////////////////////////////////////////

$fa=1;
$fs=1;

up(mount_length/2)
difference() {
	union() {
		translate([0, -(gimbal_bar_diam/2+clamp_wall)/2, 0]) {
			cube(size=[gimbal_bar_diam+2*clamp_wall, gimbal_bar_diam/2+clamp_wall, mount_length], center=true);
		}
		translate([0, -(gimbal_bar_diam/2+clamp_wall+50)/2, 0]) {
			difference() {
				cube(size=[gimbal_bar_diam+2*clamp_wall+2*helmet_wings, 40, mount_length], center=true);
				back(20) {
					xspread(gimbal_bar_diam+2*clamp_wall+2*helmet_wings) {
						zrot(45) cube([sqrt(2)*2.5, sqrt(2)*2.5, mount_length+1], center=true);
					}
					up(mount_length/2) {
						xrot(45) cube([gimbal_bar_diam+2*clamp_wall+2*helmet_wings+1, sqrt(2)*2.5, sqrt(2)*2.5], center=true);
					}
				}
			}
		}
		translate([0,mount_length/2*sin(clamp_angle),0]) {
			xrot(clamp_angle) {
				translate([0, -(gimbal_bar_diam/2+clamp_wall)/2, 0]) {
					cube(size=[gimbal_bar_diam+2*clamp_wall, gimbal_bar_diam/2+clamp_wall, mount_length*1.5], center=true);
				}
				cylinder(h=mount_length*1.5, d=gimbal_bar_diam+2*clamp_wall, center=true);
				zspread(mount_length*0.5) {
					translate([0, gimbal_bar_diam/2+clamp_wall-1, 0]) {
						difference() {
							scale([1, 1, 2]) xrot(45) cube(size=clamp_tabs, center=true);
							translate([0, clamp_tabs/3, 0]) {
								yrot(90) cylinder(h=clamp_tabs+1, r=clamp_screw/2*1.1, center=true, $fn=8);
							}
						}
					}
				}
			}
		}
	}
	translate([0,mount_length/2*sin(clamp_angle),0]) {
		xrot(clamp_angle) {
			cylinder(h=mount_length*1.6, d=gimbal_bar_diam, center=true);
			translate([0, gimbal_bar_diam/2, 0]) {
				cube(size=[2, gimbal_bar_diam, mount_length*1.6], center=true);
			}
		}
	}
	translate([0, -(helmet_x_rad+gimbal_bar_diam/2+clamp_wall), 0]) {
		scale([helmet_x_rad, helmet_x_rad, helmet_y_rad]) {
			sphere(r=1, center=true, $fn=256);
		}
	}
	zspread(mount_length+200) {
	    cube(size=200, center=true);
	}
	xspread(gimbal_bar_diam+2*helmet_wings-5) {
		zspread(mount_length/2) {
			translate([0, -(gimbal_bar_diam/2+clamp_wall), 0]) {
				cube(size=[3.1, 20, 16], center=true);
			}
		}
	}
}

// vim: noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap

```


[User]
Okay, I'm looking to design a system of parametric parts for 19-inch rack mounting, similar to the functionality of the example file I found, but I need to make it more flexible and also include some different component options.

I'd like to be able to create the following:

1.  **Rack Rails/Uprights:** The vertical parts with the mounting holes, essentially what the example calls "screw strips" but in a more complete form, as they would exist in a rack. They need to be parametric in height (number of "U" units), and also include options for the type of screw used (#10-32 or #12-24). I'd like an option to specify if the mounting holes are just clearance holes or if the rail itself is threaded. It would be nice if the rack itself can be assembled using this rail and some struts.

2.  **Rack Enclosures/Boxes:** These will be boxes that mount into the rack, but I want control over all dimensions, not just the height. I need to be able to set the width, height, and depth of the box, as well as the material thickness and whether or not there are ventilation holes in the sides, top, or bottom of the box. I need a way to mount these boxes to the rails using the existing rack standards, including a method for flush mounting with faceplates. I need to be able to specify the number of 'units' tall the box should be, and I want to also be able to specify the amount of material that is visible outside of the rack opening (i.e. a lip).

3.  **Faceplates:** Simple flat panels that attach to the rack rails. These need to be parametric in height (units) and have a material thickness setting. They should also be able to include cutouts for standard sizes (like for LEDs, displays, or switches) with an easy way to define the geometry of the cutout.

4.  **Lids:** A simple lid that can be used on a box that we make and that can also have vent holes, screw holes, and various custom features.

For all parts, I need the screw hole size to be correct based on the chosen screw type, and also should probably parameterize the hole spacing, but I'd be fine with it starting as the standard spacing as in the example.

I would like this to be modular so I can use separate SCAD files for different types of parts and assemble them into more complex designs. It seems like BOSL2 would be a good library to use, as well as maybe some parts from BOLTS for the fasteners themselves. I'd appreciate it if you could generate all the files from scratch, without assuming there's any existing code base.

[Assistant]
rackmount.scad:
```
// Creates 19 inch rackmount parts.
// See also: https://en.wikipedia.org/wiki/19-inch_rack
// NOTE: many of the models generated by this may be too large to print without splitting
// TODO: Threads in the screw strips somehow
// TODO: support for four-post racks
//
// This is licensed under Creative Commons/Attribution/Share-Alike.
// For the "attribution", please provide a conspicuous link back to:
// 	http://www.thingiverse.com/thing:840926

/* [Main] */
// What to create. (NOTE: not all settings apply to all goals)
goal=0; // [0:rack mountable box,1:rack box lid,2:face plate cover,3:screw strip,4:rack,5:demo]

// How many units tall. One unit is approximately 1.75in(44.5mm) high.
units=1;

// How thick the faceplate/container will be (mm)
containerThickness=2;

// There is no set standard, but common unit depths are 600, 800, and 1010 (mm)
depth=600;

screwType=12; // [10:#10-32,12:#12-24]

/* [Advanced] */

// Thickness for the mounting ears (mm)
mountThickness=3;

// Thickness for the screw strips (mm)
screwStripThickness=5;

rearVents=1; // [0:no,1:yes]

sideVents=1; // [0:no,1:yes]

bottomVents=0; // [0:no,1:yes]

// Usually not recommended. (for dust reasons)
topVents=0; // [0:no,1:yes]

threaded=0; // [0:guess,1:yes,2:no]

top_screw_dia=2;

top_screw_countersink_dia=4.5;

top_screw_post_dia=5;

top_screw_spacing=75;

/* [hidden] */
rackHeightPerUnit=44.50;
rackTotalWidth=482.6;
rackMachineHeightMargin=0.787; // Each machine is undersized this amount on top to allow for insertion.
screwStripWidth=15.875;
mountingHoleVerticalMargin=6.350; // the vertical margin, top and bottom within a unit
mountingHoleVerticalSpacing=15.875; // the vertical spacing between holes within a unit (gives 3 holes per unit).

function screwOutsideHoleSize(numberScrewDia)=(numberScrewDia*0.013)+0.060;
function in2mm(in)=in*25.4;

// if gap is not specified, use 1/3 the hole dia
module hexgrid(l,w,hole_dia=5.5,gap=-1){
	gap=gap>0?gap:hole_dia*2.0/3.0;
	r=hole_dia/2;
	union() for(y=[0:(hole_dia+gap)*1.5:l]){
		for(x=[0:hole_dia+gap:w]){
			translate([x,y,0]) rotate([0,0,180/6]) circle(r=r,$fn=6);
			translate([x+r+gap/2,y+r+gap*2,0]) rotate([0,0,180/6]) circle(r=r,$fn=6);
		}
	}
}

module rackMountableBoxLid(depth=600,wall_thickness=2,topVents=false){
	width=rackTotalWidth-screwStripWidth*2-10-wall_thickness*2-1; // inset from the sides a little
	depth=depth-wall_thickness*2-1;
	vent_hole_size=10;
	vent_inset=10;
	numScrewsDeep=floor((depth-top_screw_post_dia)/top_screw_spacing);
	screwDeepInset=(depth/top_screw_spacing-numScrewsDeep)*top_screw_spacing/2;
	countersink_angle=45;
	countersink_depth=((top_screw_countersink_dia)-(top_screw_dia))/tan(countersink_angle);
	difference(){
		union(){
			translate([-width/2,0,0]) linear_extrude(wall_thickness) difference(){
				square([width,depth]);
				if(topVents) translate([vent_inset,vent_inset,0]) hexgrid(depth-vent_inset*2,width-vent_inset*2,vent_hole_size);
			}
			// add some material so we're not subtracting from a vent hole
			linear_extrude(wall_thickness) for(y=[screwDeepInset+top_screw_post_dia:top_screw_spacing:depth]){
				translate([ top_screw_post_dia-width/2,y,0]) circle(r=top_screw_post_dia,$fn=12);
				translate([-top_screw_post_dia+width/2,y,0]) circle(r=top_screw_post_dia,$fn=12);
			}
		}
		for(y=[screwDeepInset+top_screw_post_dia:top_screw_spacing:depth]){
			translate([ top_screw_post_dia-width/2,y,0]) union() {
				cylinder(r2=top_screw_countersink_dia,r1=top_screw_dia,h=countersink_depth,$fn=20);
				if(countersink_depth<wall_thickness){
					cylinder(r=top_screw_dia,h=wall_thickness,$fn=20);
				}
			}
			translate([-top_screw_post_dia+width/2,y,0]) union() {
				cylinder(r2=top_screw_countersink_dia,r1=top_screw_dia,h=countersink_depth,$fn=20);
				if(countersink_depth<wall_thickness){
					cylinder(r=top_screw_dia,h=wall_thickness,$fn=20);
				}
			}
		}

	}
}

// Standard depths are 600, 800, and 1010
module rackMountableBox(units=1,depth=600,wall_thickness=2,mountThickness=3,screwType=12,rearVents=true,sideVents=true,bottomVents=false){
	width=rackTotalWidth-screwStripWidth*2-10; // inset from the sides a little
	height=rackHeightPerUnit-rackMachineHeightMargin;
	post_height=height-wall_thickness;
	numScrewsDeep=floor((depth-top_screw_post_dia)/top_screw_spacing);
	screwDeepInset=(depth/top_screw_spacing-numScrewsDeep)*top_screw_spacing/2;
	vent_hole_size=10;
	vent_inset=10;
	rotate([90,0,180]) rackmountPlate(units,wall_thickness,mountThickness,screwType);
	// bottom
	translate([-width/2,0,0]) linear_extrude(wall_thickness) difference(){
		square([width,depth]);
		if(bottomVents) translate([vent_inset,vent_inset,0]) hexgrid(depth-vent_inset*2,width-vent_inset*2,vent_hole_size);
	}
	linear_extrude(post_height) for(y=[screwDeepInset+top_screw_post_dia:top_screw_spacing:depth]){
		translate([ top_screw_post_dia-width/2,y,0]) difference() { circle(r=top_screw_post_dia,$fn=12); circle(r=top_screw_dia,$fn=20); }
		translate([-top_screw_post_dia+width/2,y,0]) difference() { circle(r=top_screw_post_dia,$fn=12); circle(r=top_screw_dia,$fn=20); }
	}
	// right side
	translate([wall_thickness-width/2,0,0]) rotate([0,-90,0]) linear_extrude(wall_thickness) difference(){
		square([height,depth]);
		if(sideVents) translate([vent_inset,vent_inset,0]) hexgrid(depth-vent_inset*2,height-vent_inset*2,vent_hole_size);
	}
	// left side
	translate([width/2,0,0]) rotate([0,-90,0]) linear_extrude(wall_thickness) difference(){
		square([height,depth]);
		if(sideVents) translate([vent_inset,vent_inset,0]) hexgrid(depth-vent_inset*2,height-vent_inset*2,vent_hole_size);
	}
	// back side
	translate([width/2,depth,0]) rotate([90,0,0]) rotate([0,0,90]) linear_extrude(wall_thickness) difference(){
		square([height,width]);
		if(sideVents) translate([vent_inset,vent_inset,0]) hexgrid(width-vent_inset*2,height-vent_inset*2,vent_hole_size);
	}
}

module rackmountPlate(units=1,plate_thicnkess=1,mountThickness=3,screwType=12){
	rackCenter2ScrewCenter=(rackTotalWidth-screwStripWidth)/2;
	translate([rackCenter2ScrewCenter,0,0]) screwStrip(units,mountThickness,false,screwType);
	translate([-rackCenter2ScrewCenter,0,0]) screwStrip(units,mountThickness,false,screwType);
	translate([-rackTotalWidth/2+screwStripWidth,rackMachineHeightMargin,0]) cube([rackTotalWidth-screwStripWidth*2,units*rackHeightPerUnit-rackMachineHeightMargin*2,plate_thicnkess]);
}

// screwType is either 12 (for #12-24) or 10 (for #10-32)
module screwStrip(units=2,screwStripThickness=5,threaded=true,screwType=12){
	total_len=units*rackHeightPerUnit;
	threaded=false; // TODO: remove me!
	linear_extrude(screwStripThickness) difference(){
		translate([-screwStripWidth/2,0,0]) square([screwStripWidth,units*rackHeightPerUnit]);
		if(threaded){
			//screwHole(scew="#12",tpi=24); // #12-24 or #10-32
		}else{
			r=in2mm(screwOutsideHoleSize(screwType))/2;
			for(u=[0:units-1]){
				for (h=[mountingHoleVerticalMargin:mountingHoleVerticalSpacing:rackHeightPerUnit-mountingHoleVerticalMargin]){
					z=u*rackHeightPerUnit+h;
					translate([0,z,0]) circle(r=r);
				}
			}
		}
	}
}

// FYI: a "full height" cabinet is 42 units high, or a little over six feet.
module rack(units=3,faceFrameWidth=10,faceFrameRecess=10,box_thickness=2,box_back=true,screwStripThickness=5,threaded=true,screwType=12){
	rackCenter2ScrewCenter=(rackTotalWidth-screwStripWidth)/2;
	translate([rackCenter2ScrewCenter,0,0]) screwStrip(units,screwStripThickness,threaded,screwType);
	translate([-rackCenter2ScrewCenter,0,0]) screwStrip(units,screwStripThickness,threaded,screwType);
}

if(goal==0){ // rack mountable box
	rackMountableBox(units=units,depth=depth,wall_thickness=containerThickness,mountThickness=mountThickness,screwType=screwType,rearVents=(rearVents==1),sideVents=(sideVents==1),bottomVents=(bottomVents==1));
}else if(goal==1){ // rack mountable box lid
	rackMountableBoxLid(depth=depth,wall_thickness=containerThickness,topVents=(topVents==1));
}else if(goal==2){ // face plate cover
	rackmountPlate(units=units,plate_thicnkess=containerThickness,mountThickness=mountThickness,screwType=screwType);
}else if(goal==3){ // screw strip
	screwStrip(units=units,screwStripThickness=screwStripThickness,threaded=(threaded!=2),screwType=screwType);
}else if(goal==4){ // rack
	rack(units=units,faceFrameWidth=10,faceFrameRecess=10,box_thickness=containerThickness,box_back=true,screwStripThickness=screwStripThickness,threaded=(threaded!=2),screwType=screwType);
}else if(goal==5){ // demo
	translate([0,30,-2*rackHeightPerUnit]) rotate([90,0,0]) rack(units=5,faceFrameWidth=10,faceFrameRecess=10,box_thickness=2,box_back=true,screwStripThickness=5,threaded=true,screwType=12);

	translate([0,-30,0]) rotate([90,0,0]) rackmountPlate(units=1,plate_thicnkess=2,mountThickness=4,screwType=12);
	translate([0,60,1.66*rackHeightPerUnit]) rackMountableBoxLid(depth=600,wall_thickness=2);
	rackMountableBox(units=1,depth=600,wall_thickness=2,mountThickness=4,screwType=12,rearVents=true,sideVents=true,bottomVents=true);
}

```


[User]
I'd like a parametric OpenSCAD design for a luggage tag, but instead of the standard rectangle, I want something a little more modern and discreet. I'm thinking a long, thin tag with angled ends. Basically, it should be a rectangular prism with cut-off corners, like a rounded rectangle but with straight cuts instead of curves.

The primary function of the tag is to display a phone number. I want to display the area code, a prefix, and the number itself, each on a separate line. I'd like to be able to adjust these values.

Here are the specifics:

*   **Shape:** A long rectangular prism with angled ends (45-degree cuts, I guess), similar to what's in the included example code, but I want the corners to be actually cut away, not just extended. Also, I want to specify the method for handling the ends - either symmetrical ends, a rotated end on the right side (the way the included code does), or both rotated and symmetrical.
*   **Dimensions:**
    *   I want to control the overall length of the tag.
    *   I'd like to be able to specify the height (z-dimension) and width (y-dimension) of the rectangular prism.
    *   The angled cut-off distance (how far in the 45-degree cut goes) should also be variable.
*   **Text:**
    *   Three lines of text: area code, prefix, and number.
    *   I need to be able to set these values as variables.
    *   I want to control the font type. I'd like to use one of the standard fonts (Liberation Sans, Roboto, Lato, Slabo 27px, Oswald, Lora, Droid Sans, for example).
    *   The text should be centered along the length of the tag and each should be aligned with their appropriate lines.
    *   I'd like to specify the size of the text.
    *   I also want to control the extrusion height of the text, so it's raised from the surface.

I don't need any fancy libraries, just the basic OpenSCAD functions. I just want a single .scad file that handles everything. Thanks!

[Assistant]
phone_number_tag_v2.scad:
```
// Key or luggage tag with phone number
// preview[view:south west, tilt:top diagonal]

// and country code if desired
area_code = "800" ;

prefix = "555" ;

number = "1234" ;

font = "Liberation Sans" ; // [Liberation Sans, Roboto, Lato, Slabo 27px, Oswald, Lora, Droid Sans]

// length (in mm)
length = 50 ; // [30:100]

// rotation of right end
end_type = "Symmetrical" ; // [Symmetrical, Rotated, Both]

// these are all hidden options
s = 13*1 ; // length of sides (y and z)
l = length*1 ;
h = s*sqrt(2)/2 ; // end cube size (hypotenuse = side)
h2 = h*0.65 ; // size of end cutout
cs = 1.7*1  ;// stretch ends
e = 1.5*1 ; // text extrusion height
ts = s*0.75 ; // text size
f = 0.001*1 ; // fudge factor to ensure manifold

difference () {
 union () {
  // main shape
  cube([l,s,s]) ;
  // left end cube
  scale([cs,1,1])
   rotate([0,0,45])
   cube([h,h,s]) ;
  // right end cube
  if (end_type == "Symmetrical" || end_type == "Both") {
    translate([l,0,0])
     scale([cs,1,1])
     rotate([0,0,45])
     cube([h,h,s]) ;
  }
  // right end cube rotated
  if (end_type == "Rotated" || end_type == "Both") {
    rotate([90,0,0])
    translate([l,0,-s])
     scale([cs,1,1])
     rotate([0,0,45])
     cube([h,h,s]) ;
  }
  // prefix text
  translate([l/2+h2/2,s/2,s-f]) {
   linear_extrude(height = e) {
    text(str("",prefix), font=font, size=ts,
     valign="center", halign="center");
   }
  }
  // area_code text
  rotate([-90,0,0]) {
   translate([l/2+h2/2,s/-2-f,s]) {
    linear_extrude(height = e) {
     text(str("",area_code), font=font, size=ts,
      valign="center", halign="center");
    }
   }
  }
  // number text
  rotate([90,0,0]) {
   translate([l/2+h2/2,s/2+f,0]) {
    linear_extrude(height = e) {
     text(str("",number), font=font, size=ts,
      valign="center", halign="center");
    }
   }
  }
 }
 // difference with end cutout
 translate([0,s/2,s/2])
  scale([cs,1,1])
  rotate([0,0,45])
  cube([h2,h2,s*1.1], center=true) ;
}

```


[User]
Hey, I'm trying to design a spacer clip for my office chair. The pneumatic cylinder keeps sinking, and I need something to hold it up. I've seen some designs that work, and I think I have an idea of what I need. I have two slightly different clip designs I'd like to explore, and I'm not sure if they should be one file or two, so I'll leave that up to you.

The first design (let's call it "clip A") is basically a cylinder with two cutouts for the chair's inner piston, and two cutouts for the outer piston. Think of it like a thick washer with some additional holes on the sides. Here's what I'm envisioning, with measurements that should be parameters:

*   **`height`**: The overall height of the clip.
*   **`diameter`**: The diameter of the chair's inner cylinder.
*   **`thickness`**: The thickness of the material surrounding the inner cylinder, and also the dimensions of the outer piston cutouts.
*   **`fn`**: I'd like to use `$fn` for the roundness of the cylinders, make this parameterizable too.

The basic shape for "clip A" is a cylinder of `diameter + 2 * thickness`, with a smaller cylinder (diameter) subtracted out, and also a rectangular cutout through the whole height to fully remove the inner cylinder shape. Then add two more cylindrical cutouts for the outer piston. And finally I also need two additional cube cutouts that go through the main body to prevent the clip from rotating around the inner cylinder, positioned to grab on to the outer piston.

The second design (call it "clip B") is designed to go with clip A. This clip provides extra hold on the chair to prevent the clip from popping off, and assumes that your chair has a slightly conical outer piston. It consists of two cylindrical cutouts, and a diagonal bar/strut that connects the cutouts. Here's how it should work:

*   It also uses the `height`, `diameter`, `thickness` and `$fn` from clip A.
*   **`clipB_padding`**: This adds a small amount of extra width to the cylindrical cutouts to account for different shapes of the outer piston.
*   It should have 2 cylindrical cutouts and 2 cube cutouts for the chair's outer piston, but offset and positioned differently from clip A.
*   Finally a bar made of a cube and two cylinders (one on each end), connecting the two cutouts in a diagonal direction. The cube should be a rectangle of `thickness * 1.5` in width, and have a length calculated such that it connects the centers of the cylindrical cutouts (45 degrees from the cutouts). The two cylinders should be `thickness * 1.5` in diameter.

I'd like to be able to adjust all of these values as parameters, so I can customize it to fit my chair. Could you make the OpenSCAD file(s) to generate these models for me?

I don't need any specific libraries, I should just be able to copy the code into OpenSCAD and run it.

[Assistant]
ChairFix.scad:
```
//Clip Height
height=30;
//Cylinder diameter
diameter=29;
//Clip Thickness
thickness=5;
//Roundness
$fn=256;

difference(){
    cylinder(d=diameter+(thickness*2),h=height);
    translate([0,0,-1]){cylinder(d=diameter,h=height+2);}
    translate([0,0,-1])cube([diameter+(thickness*2),diameter+(thickness*2),height+2]);
}
translate([(diameter+(thickness*2))/2,0,0])cylinder(d=thickness*2,h=height);
translate([0,(diameter+(thickness*2))/2,0])cylinder(d=thickness*2,h=height);

//color("grey")translate([0,0,-5])cylinder(d=diameter,h=height+10);
```
ChairFix2.scad:
```
//Clip Height
height=30;
//Cylinder diameter
diameter=28.5;
//Clip Thickness
thickness=5;
//Roundness
$fn=256;
//ClipB Padding
clipB_padding=1;

color("blue")clipA();

color("red")translate([thickness*1.5,thickness*1.5,0]) clipB();

module clipA(){
    difference(){
        union(){
            difference(){
                cylinder(d=diameter+(thickness*2),h=height);
                translate([0,0,-1]){cylinder(d=diameter,h=height+2);}
                translate([0,0,-1])cube([diameter+(thickness*2),diameter+(thickness*2),height+2]);
            }
            translate([(diameter+(thickness*2))/2,0,0])cylinder(d=thickness*2,h=height);
            translate([0,(diameter+(thickness*2))/2,0])cylinder(d=thickness*2,h=height);
        }
        //Securing Clip
        translate([diameter/2+thickness,-thickness,-1])cube([thickness,thickness,height+2]);
        translate([-thickness,diameter/2+thickness,-1])cube([thickness,thickness,height+2]);
    }
}

module clipB(){
    difference(){
        translate([(diameter+(thickness*4))/2,0,0])cylinder(d=thickness*2,h=height);
        translate([diameter/2+thickness,0,-1])cube([thickness,thickness,height+2]);
    }
    difference(){
        translate([0,(diameter+(thickness*4))/2,0])cylinder(d=thickness*2,h=height);
        translate([0,diameter/2+thickness,-1])cube([thickness,thickness,height+2]);
    }
    sideLen=diameter/2+thickness*2;
    barLen=sqrt((sideLen*sideLen)+(sideLen*sideLen));
    difference(){
        translate([sideLen/2,sideLen/2,0])rotate([0,0,45])translate([0,-barLen/2,0]){
            cube([thickness*1.5,barLen,height]);
            translate([thickness*1.5/2,0,0])cylinder(d=thickness*1.5,h=height);
            translate([thickness*1.5/2,barLen,0])cylinder(d=thickness*1.5,h=height);
        }
        translate([(diameter+(thickness*2))/2,0,-1])cylinder(d=thickness*2+clipB_padding,h=height+2);
        translate([0,(diameter+(thickness*2))/2,-1])cylinder(d=thickness*2+clipB_padding,h=height+2);
    }
}

//color("grey")translate([0,0,-5])cylinder(d=diameter,h=height+10);
```


[User]
Hey, I'm looking to create some parametric geometric cookie cutters using OpenSCAD. I'd like to be able to customize the shape, size, and some other parameters for 3D printing.

Here's what I'm thinking:

**Core Shape:**
*   I want the core shape to be a regular polygon.
*   I need to control the number of sides (e.g., triangle, square, pentagon, etc.).
*   The overall size of the shape should be adjustable via a diameter (or maybe radius), and not just side lengths.

**Shape Modification:**
*   I want a parameter to control how 'uneven' the sides are. A value of 1 should give a regular polygon, but a value of 2 should give me something like a rectangle (or a 30-60-90 triangle if it's a 3-sided shape). This should effectively scale the shape on the X and Y axis differently based on this ratio.
*   It would be cool to have another parameter that lets me skew the polygon by rotating it. This would let me make parallelograms, diamonds, etc.

**Cutter Parameters:**
*   The cutter needs to have a cutting edge, of course, and it should have a flat flange around the top to make it easier to press into the dough.
*   I'll need to set the cutter's overall height, the width and height of the flange, and the thickness of the cutter itself.

**Build Plate Visualization:**

*   I would also like the option to see the shape on a virtual build plate.
*   It should have some presets for common printers (like the Replicator 2, Replicator, Thingomatic), but also have the option to set custom X and Y dimensions manually.

I'd like it to be all one file (or maybe a couple files), with parameters that I can change in the customizer. It doesn't seem like it should require any special libraries - just the basics in OpenSCAD. Could you generate the OpenSCAD code for me based on this description? I would also like some guidance on how to assemble the files if they are separate.

[Assistant]
GeometricCookieCutter.scad:
```
use <utils/build_plate.scad>

/* [Geometry] */
// The size of the shape
cutter_width = 45;
// The number of sides
sides = 3;
// How uneven to make the sides. 2 gives a rectangle or 30-60-90 triangle.
xyratio = 1;
// Skew the shape, with a side ratio of 2, 45 degrees makes a diamond and an isoceles triangle.
skew_angle = 0;

/* [Cutter options] */
flange_width = 5;
flange_height = 1;
cutter_thickness = 1;
height = 13;
/* [Build plate] */

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

//when Build Plate Selector is set to "manual" this controls the build plate x dimension
build_plate_manual_x = 100; //[100:400]

//when Build Plate Selector is set to "manual" this controls 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);

/* [Hidden] */
// All done. Customizer doesn't need to see all this

$fn = 80;
rad = cutter_width/2;

xscale = 2/(xyratio+1);
yscale = 2*xyratio/(xyratio+1);

difference(){
    union(){
        minkowski(){
            cutter(height);
            cylinder (r = cutter_thickness, h = 0.1);
        }
        minkowski(){
            cutter(flange_height);
            cylinder (r = flange_width, h = 0.1);
        }
    }
    translate([0,0,-height])cutter(height*3);
}

module cutter(high = height){
    $fn = sides;
    scale([xscale,yscale,1])
    rotate([0,0,180/sides+skew_angle])cylinder (r = rad, h = high);
}
```


[User]
I'm looking to create a customizable grid using OpenSCAD, and I need a bit of help designing it. I'd like to be able to control a few key parameters.

First, the overall dimensions should be adjustable, so I need `width` and `height` parameters. The grid will be made up of cells or squares. So, I need parameters for how many `cols` and `rows` there are, which should default to 10 each, as well as a `border` parameter to control the spacing between the edge of the grid and the first cell (default to 4). Also important is the spacing between the rows and columns, controlled by a `spacing` variable (default to 0.8). Finally, I need a `thickness` parameter to define how thick the final grid is (default to 2).

The grid should be a subtraction of the squares from a full rectangle, which I’ve done before, but it seems like I can get better results with the AI. I'm thinking the grid should be made up of rectangular cuts through a solid block of material, so the final product will be a sort of flat framework. I need a single output, no individual pieces.

Could you create the OpenSCAD file for me? I don't need any libraries for this design.

[Assistant]
custom_grid.scad:
```
// Grid
// By Dana Woodman <dana@danawoodman.com>

// Settings
//--------------------------

/* [Global] */

// The width of the exported file.
width = 30;

// The height of the exported file.
height = 30;

// The number of columns to generate.
cols = 10;

// The number of rows to generate.
rows = 10;

// The border around the grids/slats
border = 4;

// The spacing between rows/columns.
spacing = .8;

//thickness
thickness = 2;

/* [Hidden] */

// The magic...
//--------------------------

// Calculated inner width of dispaly area.
innerWidth = (width - (2 * border));
innerHeight = (height - (2 * border));
//echo("innerWidth", innerWidth, "innerHeight", innerHeight);

// Calculate size of the squares.
function dimension(size, divisions) = (size - ((divisions - 1) * spacing)) / divisions;
xWidth = dimension(innerWidth, cols);
yWidth = dimension(innerHeight, rows);
//echo("xWidth", xWidth, "yWidth", yWidth);

function calculate_location(size, index, spacing) = (size + spacing) * index;

eps=.001;
// Subtract the squares from the display area.
difference() {

	// The display area.
	cube(size=[width, height,thickness]);

	// Offset by border size.
	translate([border, border,-eps])

		// Iterate over all the columns.
		for (col = [0 : cols - 1]) {

			// Iterate over all the rows.
			for (row = [0 : rows - 1]) {

				// Caclulate position of each square
				translate([
					calculate_location(xWidth, col, spacing),
					calculate_location(yWidth, row, spacing)
				])
					cube(size=[xWidth, yWidth,2*thickness]);
			}
		}
}

```


[User]
I'd like to create a parametric grid pattern on the surface of a tube, similar to how the attached `custom_gridoncircle.scad` file makes a grid on a flat surface. However, instead of a rectangle, I need to apply that kind of grid pattern onto a cylindrical shape.

My ideal setup would allow me to specify:

*   The overall diameter and length of the tube.
*   The number of grid rows and columns around the circumference and along the length, respectively.
*   The thickness of the grid material and the spacing between grid elements.
*   The thickness of the tube itself (not just the grid).
*   The border around the tube - to adjust the grid to not go all the way to each edge of the tube.

The grid elements should also be rectangular. Essentially, if you unwrap the tube, the grid would look very similar to the attached file but wrap around once you reform it.

Could you generate OpenSCAD code to achieve this? I'm not using any external libraries beyond the standard OpenSCAD functionality. I also need the generated file to be parametric and easy to modify with specific values when needed.

[Assistant]
custom_gridoncircle.scad:
```
// Grid
// By Dana Woodman <dana@danawoodman.com>

// Settings
//--------------------------

/* [Global] */

// The width of the exported file.
width = 30;

// The height of the exported file.
height = 30;

// The number of columns to generate.
cols = 10;

// The number of rows to generate.
rows = 10;

// The border around the grids/slats
border = 1;

// The spacing between rows/columns.
spacing = .8;

//thickness
thickness = 2;

/* [Hidden] */

// The magic...
//--------------------------

// Calculated inner width of dispaly area.
innerWidth = (width - (2 * border));
innerHeight = (height - (2 * border));
//echo("innerWidth", innerWidth, "innerHeight", innerHeight);

// Calculate size of the squares.
function dimension(size, divisions) = (size - ((divisions - 1) * spacing)) / divisions;
xWidth = dimension(innerWidth, cols);
yWidth = dimension(innerHeight, rows);
//echo("xWidth", xWidth, "yWidth", yWidth);

function calculate_location(size, index, spacing) = (size + spacing) * index;

eps=.001;
// Subtract the squares from the display area.
difference() {

	// The display area.
    union()
    {
        translate([width/2,height/2,0])
        cylinder(r=1.414*max(width,height)/2,h=thickness);
        cube(size=[width, height,thickness]);
    }
	// Offset by border size.
	translate([border, border,-eps])

		// Iterate over all the columns.
		for (col = [0 : cols - 1]) {

			// Iterate over all the rows.
			for (row = [0 : rows - 1]) {

				// Caclulate position of each square
				translate([
					calculate_location(xWidth, col, spacing),
					calculate_location(yWidth, row, spacing)
				])
					cube(size=[xWidth, yWidth,2*thickness]);
			}
		}
}

```


[User]
Hey, I need an OpenSCAD design for a cylinder with a viewport cut out of its side. I'd like the cylinder to be hollow, basically a tube, and I want to be able to control several dimensions through parameters.

Specifically, I need:

*   A parameter for the overall diameter of the cylinder.
*   A parameter for the wall thickness.
*   A parameter for the total height of the cylinder.
*   A parameter for the height of the base at the bottom, which could be zero to make it a completely open tube.
*   A parameter for the height of the viewport (the cutout).
*   A parameter for how far the viewport is offset from the center of the cylinder along its circumference.

I'd like the viewport to be a rectangular cutout. I'm also hoping it will be centered vertically along the cylinder height by default. Let me know if you have any questions. Thanks!

[Assistant]
cylinder_with_viewport.scad:
```
//Diameter of cylinder
diameter=30;
//Width of single wall layer
extrusionWidth=0.55;
//Height of cylinder
height=100;
//Height/thickness of bottom (0 for no bottom)
layerHeight=0;
//height of viewport
viewportheight=70;
//viewport width
viewportoffset=-10;
/* [hidden] */
rad=diameter/2;
$fn=200;

union() {
translate([0,0,-layerHeight]) cylinder(r=rad, h=layerHeight);
	difference () {
		cylinder(r=rad, h=height);
        union()
        {
            translate([0,0,-1])
            cylinder(r=rad-extrusionWidth, h=height+2);
            translate([-rad*2,-rad*2+viewportoffset,height/2-viewportheight/2])
            cube(size=[rad*6,rad*2,viewportheight]);
        }
	}
}
```


[User]
I'd like to design a fish-shaped desk organizer with some customizability. I'm thinking it should have a main body, a section for holding pencils, and some slots for holding papers. I want to be able to adjust the main body radius, the pencil holder radius, the width of the paper slots, and the overall height of the organizer.

Specifically:

*   The main body should be a roughly cylindrical shape with squared off sides, like a rounded cube.
*   There should be several holes for pencils, arranged in a roughly square pattern near the center of the fish's body, and these should be equally spaced.
*   The slots for holding paper should be at the tail end of the fish, and should be angled slightly relative to the x and y axes. There should be two sets of slots that go in perpendicular directions.

I want to use OpenSCAD to make this parametric, so I can adjust the dimensions later. I'm not using any special libraries. Could you generate the SCAD code for me?

[Assistant]
Fish.scad:
```
//Fish Orginizer

//Main Body Radius
BodyRadius = 90;

//Pencil Radius
PencilRadius = 3;

//Slot Width
SlotWidth = 1;

//Height
Height = 10;

//Main Body
difference(){
    union(){
        cylinder(Height,BodyRadius,BodyRadius);
        cube([BodyRadius,BodyRadius,Height]);
        translate([-BodyRadius,-BodyRadius,0]){
            cube([BodyRadius,BodyRadius,Height]);
        }
    }
    translate([BodyRadius/2,BodyRadius/2,0]){
        cube([BodyRadius/2,BodyRadius/2,Height]);
    }
    //Pencil Holder
    for(a = [-BodyRadius*4/9:PencilRadius*2:BodyRadius*2/3]){
        translate([-a,-a,0]){
            cylinder(Height,PencilRadius,PencilRadius,$fn = 100);
        }
    }

    //Eye
    translate([-BodyRadius*7/9,-BodyRadius*7/9,Height/2]){
        cylinder(Height/2,BodyRadius*1/9,BodyRadius*1/9);
    }
}
translate([-BodyRadius*7/9,-BodyRadius*7/9,Height/2]){
    cylinder(Height/2,BodyRadius*1/18,BodyRadius*1/18);
}

//Tail Paper Holder
translate([BodyRadius/2,BodyRadius/2,0]){
    difference(){
        cube([BodyRadius,BodyRadius,Height]);
        rotate([0,0,45]){
            translate([-BodyRadius/5-SlotWidth/2,-BodyRadius/5-SlotWidth/2,0]){
                cube([BodyRadius*1.5,SlotWidth,Height]);
            }
        }
        rotate([0,0,45]){
            translate([-BodyRadius/15-SlotWidth/2,-BodyRadius/15-SlotWidth/2,0]){
                cube([BodyRadius*1.5,SlotWidth,Height]);
            }
        }
        rotate([0,0,45]){
            translate([BodyRadius/15-SlotWidth/2,BodyRadius/15-SlotWidth/2,0]){
                cube([BodyRadius*1.5,SlotWidth,Height]);
            }
        }
        rotate([0,0,45]){
            translate([BodyRadius/5-SlotWidth/2,BodyRadius/5-SlotWidth/2,0]){
                cube([BodyRadius*1.5,SlotWidth,Height]);
            }
        }
    }
}
```


[User]
I want to design a customizable, modular tower using OpenSCAD, and I'm imagining a structure built up from twisted cubes. The base will be a simple rectangular prism, and then I'll stack several layers of these twisted cubes on top. I want to be able to easily modify the size, height, twist angle, and number of segments in each twist, and I'd also like to be able to control the spacing and number of cubes at each level of the tower.

Specifically, the design should have these core components and parameters:

*   **Base:** A rectangular prism that forms the foundation. It should have a `BaseWidth`, `BaseLength`, and `BaseHeight`.
*   **Twisted Cube:** This will be the repeating module of the tower. Each cube should have a `CubeWidth`, `CubeLength`, and `CubeHeight`. It should be generated using `linear_extrude` with a `Twist` angle, a `Scale` factor (from bottom to top - this could just start with 0 for no scaling), and `Slices` for controlling the smoothness of the twist.
*   **Layering:** The tower will have multiple layers of cubes. The cubes can either be centered on each other, or staggered/offset, similar to the example code I've included. The horizontal and vertical placement of these cubes, and the number of cubes at each layer, should all be customizable.

I'm also thinking I'd like to specify how many layers of cubes there are, and the vertical position/spacing of each cube layer from the base.

Can you create a set of parametric OpenSCAD files for this? I think using modules would be the most flexible approach for this, allowing me to define and then reuse base, cube, and layer designs. I'm not using any specific libraries, so I don't need to worry about dependencies there.

[Assistant]
LinearExtrude.scad:
```
//Customizable Linear Extrude Sculpture

//Width Of Bottom Of Twisted Cube
WidthOfBottom = 40;

//Length Of Bottom Of Twisted Cube
LengthOfBottom = 40;

//Height Of Twisted Cube
HeightOfTwistedCube = 40;

//Twist Of Cube
Twist = 90;

//Scale From Bottom To Top Of Twisted Cube
Scale = 0;

//Slices Of 1 Twisted Cube
Slices = 90;

//Base Height
BaseHeight = 1;

translate([0,0,BaseHeight]){
    //Top Twisted Cube
    translate([0,0,HeightOfTwistedCube/2]){
        cube([WidthOfBottom,LengthOfBottom,HeightOfTwistedCube],center=true);
    }
    translate([0,0,HeightOfTwistedCube]){
        linear_extrude(height = HeightOfTwistedCube, scale = Scale, twist = Twist, slices = Slices)
            square([WidthOfBottom,LengthOfBottom],center= true);
    }

    //Four Raised Twisted Cubes
    translate([0,0,HeightOfTwistedCube/2]){
        translate([WidthOfBottom,0,0]){
            linear_extrude(height = HeightOfTwistedCube, scale = Scale, twist = Twist, slices = Slices)
                square([WidthOfBottom,LengthOfBottom],center = true);
        }
        translate([0,LengthOfBottom,0]){
            linear_extrude(height = HeightOfTwistedCube, scale = Scale, twist = Twist, slices = Slices)
                square([WidthOfBottom,LengthOfBottom],center = true);
        }
        translate([-WidthOfBottom,0,0]){
            linear_extrude(height = HeightOfTwistedCube, scale = Scale, twist = Twist, slices = Slices)
                square([WidthOfBottom,LengthOfBottom],center = true);
        }
        translate([0,-LengthOfBottom,0]){
            linear_extrude(height = HeightOfTwistedCube, scale = Scale, twist = Twist, slices = Slices)
                square([WidthOfBottom,LengthOfBottom],center = true);
        }
    }
    translate([0,0,10]){
        translate([WidthOfBottom,0,0]){
            cube([WidthOfBottom,LengthOfBottom,HeightOfTwistedCube/2],center = true);
        }
        translate([0,LengthOfBottom,0]){
            cube([WidthOfBottom,LengthOfBottom,HeightOfTwistedCube/2],center = true);
        }
        translate([-WidthOfBottom,0,0]){
            cube([WidthOfBottom,LengthOfBottom,HeightOfTwistedCube/2],center = true);
        }
        translate([0,-LengthOfBottom,0]){
            cube([WidthOfBottom,LengthOfBottom,HeightOfTwistedCube/2],center = true);
        }
    }

    //Four Bottom Twisted Cubes
    translate([WidthOfBottom,LengthOfBottom,0]){
        linear_extrude(height = HeightOfTwistedCube, scale = Scale, twist = Twist, slices = Slices)
            square([WidthOfBottom,LengthOfBottom],center = true);
    }
    translate([-WidthOfBottom,LengthOfBottom,0]){
        linear_extrude(height = HeightOfTwistedCube, scale = Scale, twist = Twist, slices = Slices)
            square([WidthOfBottom,LengthOfBottom],center = true);
    }
    translate([WidthOfBottom,-LengthOfBottom,0]){
        linear_extrude(height = HeightOfTwistedCube, scale = Scale, twist = Twist, slices = Slices)
            square([WidthOfBottom,LengthOfBottom],center = true);
    }
    translate([-WidthOfBottom,-LengthOfBottom,0]){
        linear_extrude(height = HeightOfTwistedCube, scale = Scale, twist = Twist, slices = Slices)
            square([WidthOfBottom,LengthOfBottom],center = true);
    }
}

//Base
translate([0,0,BaseHeight/2]){
    cube([WidthOfBottom*3,LengthOfBottom*3,BaseHeight],center = true);
}
```


[User]
Hey, I'm looking to create a customizable, hollow, horn-like shape using OpenSCAD. I've seen some examples online, but I want to be able to tweak the design quite a bit. I'm hoping you can help me generate the necessary SCAD code.

Specifically, the basic shape I'm after is a hollow, truncated cone, but instead of a straight cone, I'd like the radius to follow a parabolic curve along its length. I want to control the radius at the top and bottom of the horn, the overall height, and the 'thinness' of the wall, defining the thickness of the hollow part.

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

*   **`height`**: The overall height of the horn.
*   **`radius_top`**: The radius at the top (narrow) end of the horn.
*   **`radius_bottom`**: The radius at the bottom (wide) end of the horn.
*   **`thinness`**: A value between 0 and 1 that controls how hollow the horn is (i.e., what fraction of the radius defines the inner wall radius). For example, a `thinness` of 0.9 would mean the inner radius is 90% of the outer radius at any given height. A thinness of 0 would mean a solid shape.

Additionally, I'd like to control the vertical resolution of the shape, effectively setting the number of sub-cones that are used to build the overall shape. Let's call this parameter `segments`.

I'd prefer it if the code used incremental cones so that the surface of the horn is smooth (as opposed to a single cone with a parabolic curve).

For smoothness of the model I'd also like to set `$fs` to a small value (1 is good enough) but also be able to control `$fn` which controls the number of facets around the circumference. I don't need a specific default value for this since it depends on what I'm trying to print.

To be clear, I am looking for the ability to control all parameters listed above including `$fs` and `$fn`.

Can you generate an OpenSCAD file for this? I'm not using any extra libraries right now, so I don't need any additional files.

[Assistant]
clarion_horn.scad:
```
// ArbiColumn v1_0
// GPLv2
// (c) 2012 TakeItAndRun

// Demo of how to make cylinders with varying radius in OpenSCAD

// a small number
// every sub-cylinder overlapps the next one by a distance 0.02mm
// this will avoid slicer errors

//segment height
e=0.02;

// height of horn
h=100;

//radius at top of horn
r0=1;
//radius at bottom of horn
r1=10;

//thinness (Between 0-.999; the higher the number, the thinner it is.
thinness=.9;

/* [hidden] */
// vertical resolution
nh=32;
//nh=128;

// height of each sub-cylinder (actually, they are really sub-cones)
dh=h/nh;

// make circles look nice and smooth
// smallesd size of every radial facet, this should be way sufficient for 3D-printing
$fs=1;
// total number of radial facets
//$fn=128;		//makes the column real smooth
//$fn=4;			// makes square colums
//$fn=6;			// makes hexagonal colums

// loop over 0 to 1 in steps of 1/nh
// (this will actually make a column of height h+e=10+0.02
for(i=[0:1/nh:1-1/nh]){
// pick a color for every column,
// move every column along the x-axis and
// move every cone up to the hight i*h
// make a cone of hight dh+e, so such every cone overlapps the next
// do this for 5 different funktions of r
	color("cyan")translate([0,0,i*h])
    difference()
    {
        cylinder(h=dh+e,r1=rad(i),r2=rad(i+1/nh));
        translate([0,0,-.001])
        cylinder(h=dh+e+.002,r1=thinness*rad(i),r2=thinness*rad(i+1/nh));
    }
}

// a quadratic or parabel column: concave
// (the zero point of the modulation function is at i=0.5
//function r1(i)=r0*(1+2*a*(i-1)*(i-1));//between 1 and 1+2a
function rad(i)=r0+(1+2*((r1-1)/2)*(i-1)*(i-1));//between 1 and 1+2a
//we want r1=r2=1+2a when i=0
//a = (r2-1)/2

```


[User]
I need a custom enclosure designed for some electronics I'm working on. I'd like it to be a box with a lid that attaches with screws. The box itself should have adjustable length, width, and height. The wall thickness should also be customizable.

The lid should have a matching length and width to the box, and should have screw holders on the sides to attach it to the box. I'd like to control how far the screw holders stick out from the lid, and their width, and how high up the lid they start. The screw holes themselves should also have a diameter that can be adjusted.

Could you generate the OpenSCAD code for this? I don't have any existing code to work with. I do not need support for any specific libraries or external modules for this design. It should just use the built-in OpenSCAD features.

[Assistant]
case.scad:
```
// Wall Thickness in mm (this is subtracted from the inner space of the cover, all other dimensions are outer measurements. height of 20mm, wall thickness of 1mm gives a usable inner space of 19mm height)
thickness = 2; // [0.2:0.1:50]

//Length of cover im mm (does not include screw-holders)
length = 120; // [1:1000]

//Width of cover in mm
width = 50; // [1:1000]

//Height of cover in mm
height = 30; // [1:1000]

//Width of the screwholder in mm on the side of the cover
screwholder_width = 15; // [1:100]

//How far the screwholder stands out from the cover in mm
screwholder_length = 15; // [1:100]

//How high on the box should the screwholder start to grow, higher value will lessen the overhang
screwholder_height = 15; // [1:100]

//Screhole diameter in mm
screwhole_d = 3; // [1:100]

module screwholder() {
    difference() {
        union() {
            resize([screwholder_width, screwholder_length, screwholder_height])
            cube();

        }

        translate([thickness, 0, 0])
        resize([screwholder_width - thickness*2, screwholder_length - thickness, screwholder_height - thickness])
        cube();

        resize([screwholder_width+0.01, screwholder_length, screwholder_height])
        translate([0,0,1])
        rotate([0,90,0])
        linear_extrude(height=1)
        polygon(points = [[0,0], [1,0], [1,1]]);

        translate([screwholder_width/2, screwholder_length/2,screwholder_height-thickness])
        cylinder(d=screwhole_d, h=thickness, $fn=100);
    }
}

union() {

    difference() {
        resize([width, length, height])
        cube();

        translate([thickness, thickness, thickness])
        resize([width - thickness*2, length - thickness*2, height - thickness])
        cube();
    }

    translate([width/2 - screwholder_width/2, -screwholder_length, height - screwholder_height])
    screwholder();

    translate([width/2 - screwholder_width/2, length + screwholder_length, height - screwholder_height])
    mirror([0,1,0])
    screwholder();
}

```


[User]
Hey there, I'm looking to create a customizable wall sign using OpenSCAD, and I'd like it to be pretty flexible. I've got some ideas on how I'd like the edges and corners to look, and I'm hoping you can help me design the scad file.

Essentially, I want to be able to specify the following:

*   **Text Content:**  The actual text displayed on the sign (a simple string).
*   **Text Dimensions:** I need to set the width and height of the text area.
*   **Base Thickness:** The thickness of the main back plate of the sign.
*   **Margin:** How much extra space should be around the text, basically a border area on all sides.
*   **Corner Type:**  I'd like to be able to choose between square, round, or chamfered corners for the overall rectangular area that contains the text.
*  **End Type:** I want to have different shapes for the ends of the sign, such as rounded, rounded on the left only, rounded on the right only, square, triangular, triangular on the left only, and triangular on the right only.
*   **Rounded End Inset:** When I choose rounded ends, I need to be able to control how much they're inset from the edges, and it should be a percentage value relative to the sign's height. 100% should mean a completely round end.
*   **Mounting Holes:**  I want to be able to add mounting holes and specify where they should be (none, top, left, right, both left and right, or in the corners).
*  **Mounting Hole Diameter:** Obviously I need to control the size of the mounting holes
*   **Raised Border:** The sign should also have a raised border around the text area, which should also have an adjustable width and depth. I want to be able to disable this as well.
*   **Font Settings:** I need to be able to set the font family (like "Arial", "Times New Roman," etc.) as well as its weight (normal, bold, etc.) and if it should be italic or not.
*   **Text Fatness/Thickness:** I want to adjust how thick the font is rendered (like "boldness") and I need to set the depth of the text – it can be raised from the plate, cut into it, or cut completely through it.

I don’t need any fancy libraries, just something that uses OpenSCAD’s basic functions and is easy to customize. Could you generate the SCAD file based on those options? Thanks!

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

$fn=16*1;

E = 0.01*1; // epsilon value -- a small value big enough to avoid dumb roundings

/* [General] */

// Text to be displayed
content="The Leaky Cauldron";

// Width of the text (mm)
text_width=145; // [1:150]

// Height of the text (mm)
text_height = 30; // [1:50]

// Thickness of the bottom plate (mm)
base_thickness=1.0;

// Extra space around the text (mm)
margin=4; // [0:10]

// What kind of shape on the corners?
margin_type = "square"; //[round,square,chamfer]

// What kind of shape for the ends?
margin_end_type = "rounded"; //[rounded,rounded_left,rounded_right,square,triangular,triangular_left,triangular_right]

// How much should rounded ends be inset from the sides (%)?
lobe_radius = 90.0;

// Add mounting holes?
holes = "left+right"; // [none,top,left,right,left+right,corners]

// Mounting hole diameter (mm)
hole_dia = 4; // [1:20]

// Width of the raised border, in tenths of a millimeter (0.1mm's)
border_width_tenths = 20; // [0:50]
border_width = min([margin,border_width_tenths/10]);

// Vertical thickness of the border. Optional, set to 0 to disable (mm)
border_thickness = 1; // [0:20];

/* [Font] */

// You can increase or decrease the thickness of the font with this.
text_fatness_percent = 0; // [-10:10]

// Thickness (depth) of the text (-2 means "cut through", -1 means "cut into", 0 means "very subtly raised", other numbers set the raised text height in mm)
text_thickness_set = 1; // [-2:20]

// Please refer: http://www.google.com/fonts
font_name="Slabo 27px"; //[ABeeZee,Abel,Abril Fatface,Aclonica,Acme,Actor,Adamina,Advent Pro,Aguafina Script,Akronim,Aladin,Aldrich,Alef,Alegreya,Alegreya Sans,Alegreya Sans SC,Alegreya SC,Alex Brush,Alfa Slab One,Alice,Alike,Alike Angular,Allan,Allerta,Allerta Stencil,Allura,Almendra,Almendra Display,Almendra SC,Amarante,Amaranth,Amatic SC,Amethysta,Amiri,Anaheim,Andada,Andada SC,Andika,Angkor,Annie Use Your Telescope,Anonymous Pro,Antic,Antic Didone,Antic Slab,Anton,Antonio,Arapey,Arbutus,Arbutus Slab,Architects Daughter,Archivo Black,Archivo Narrow,Arimo,Arizonia,Armata,Artifika,Arvo,Asap,Asset,Astloch,Asul,Atomic Age,Aubrey,Audiowide,Autour One,Average,Average Sans,Averia Gruesa Libre,Averia Libre,Averia Sans Libre,Averia Serif Libre,Bad Script,Balthazar,Bangers,Basic,Battambang,Baumans,Bayon,Belgrano,Belleza,BenchNine,Bentham,Berkshire Swash,Bevan,Bhavuka,Bigelow Rules,Bigshot One,Bilbo,Bilbo Swash Caps,Bitter,Black Ops One,Bokor,Bonbon,Boogaloo,Bowlby One,Bowlby One SC,Brawler,Bree Serif,Bruno Ace,Bruno Ace SC,Bubblegum Sans,Bubbler One,Buda,Buenard,Butcherman,Butcherman Caps,Butterfly Kids,Cabin,Cabin Condensed,Cabin Sketch,Caesar Dressing,Cagliostro,Calligraffitti,Cambay,Cambo,Candal,Cantarell,Cantata One,Cantora One,Capriola,Cardo,Carme,Carrois Gothic,Carrois Gothic SC,Carter One,Caudex,Cedarville Cursive,Ceviche One,Changa,Changa One,Chango,Chau Philomene One,Chela One,Chelsea Market,Chenla,Cherry Cream Soda,Cherry Swash,Chewy,Chicle,Chivo,Cinzel,Cinzel Decorative,Clara,Clicker Script,Coda,Coda Caption,Codystar,Combo,Comfortaa,Coming Soon,Concert One,Condiment,Content,Contrail One,Convergence,Cookie,Copse,Corben,Courgette,Cousine,Coustard,Covered By Your Grace,Crafty Girls,Creepster,Creepster Caps,Crete Round,Crimson Text,Croissant One,Crushed,Cuprum,Cutive,Cutive Mono,Damion,Dancing Script,Dangrek,Dawning of a New Day,Days One,Dekko,Delius,Delius Swash Caps,Delius Unicase,Della Respira,Denk One,Devonshire,Dhurjati,Dhyana,Didact Gothic,Dinah,Diplomata,Diplomata SC,Domine,Donegal One,Doppio One,Dorsa,Dosis,Droid Arabic Kufi,Droid Arabic Naskh,Droid Sans,Droid Sans Ethiopic,Droid Sans Mono,Droid Sans Thai,Droid Serif,Droid Serif Thai,Dr Sugiyama,Duru Sans,Dynalight,Eagle Lake,Eater,Eater Caps,EB Garamond,Economica,Eczar,Ek Mukta,Electrolize,Elsie,Elsie Swash Caps,Emblema One,Emilys Candy,Encode Sans,Encode Sans Compressed,Encode Sans Condensed,Encode Sans Narrow,Encode Sans Wide,Engagement,Englebert,Enriqueta,Erica One,Esteban,Euphoria Script,Ewert,Exo,Exo 2,Expletus Sans,Fanwood Text,Fascinate,Fascinate Inline,Faster One,Fasthand,Fauna One,Federant,Federo,Felipa,Fenix,Finger Paint,Fira Mono,Fira Sans,Fjalla One,Fjord One,Flamenco,Flavors,Fondamento,Fontdiner Swanky,Forum,Francois One,Freckle Face,Fredericka the Great,Fredoka One,Freehand,Fresca,Frijole,Fruktur,Fugaz One,Gabriela,Gafata,Galdeano,Galindo,Gentium Basic,Gentium Book Basic,Geo,Geostar,Geostar Fill,Germania One,GFS Didot,GFS Neohellenic,Gidugu,Gilda Display,Give You Glory,Glass Antiqua,Glegoo,Gloria Hallelujah,Goblin One,Gochi Hand,Gorditas,Goudy Bookletter 1911,Graduate,Grand Hotel,Gravitas One,Great Vibes,Griffy,Gruppo,Gudea,Gurajada,Habibi,Halant,Hammersmith One,Hanalei,Hanalei Fill,Handlee,Hanuman,Happy Monkey,Headland One,Helvetica,Henny Penny,Hermeneus One,Herr Von Muellerhoff,Hind,Holtwood One SC,Homemade Apple,Homenaje,Iceberg,Iceland,IM Fell Double Pica,IM Fell Double Pica SC,IM Fell DW Pica,IM Fell DW Pica SC,IM Fell English,IM Fell English SC,IM Fell French Canon,IM Fell French Canon SC,IM Fell Great Primer,IM Fell Great Primer SC,Imprima,Inconsolata,Inder,Indie Flower,Inika,Inknut Antiqua,Irish Grover,Irish Growler,Istok Web,Italiana,Italianno,Jacques Francois,Jacques Francois Shadow,Jaldi,Jim Nightshade,Jockey One,Jolly Lodger,Josefin Sans,Josefin Sans Std Light,Josefin Slab,Joti One,Judson,Julee,Julius Sans One,Junge,Jura,Just Another Hand,Just Me Again Down Here,Kadwa,Kalam,Kameron,Kantumruy,Karla,Karla Tamil Inclined,Karla Tamil Upright,Karma,Kaushan Script,Kavoon,Kdam Thmor,Keania One,Kelly Slab,Kenia,Khand,Khmer,Khula,Kite One,Knewave,Kotta One,Koulen,Kranky,Kreon,Kristi,Krona One,La Belle Aurore,Laila,Lakki Reddy,Lancelot,Lateef,Lato,League Script,Leckerli One,Ledger,Lekton,Lemon,Lemon One,Liberation Sans ,Libre Baskerville,Libre Caslon Text,Life Savers,Lilita One,Lily Script One,Limelight,Linden Hill,Lobster,Lobster Two,Lohit Bengali,Lohit Tamil,Londrina Outline,Londrina Shadow,Londrina Sketch,Londrina Solid,Lora,Loved by the King,Lovers Quarrel,Love Ya Like A Sister,Luckiest Guy,Lusitana,Lustria,Macondo,Macondo Swash Caps,Magra,Maiden Orange,Mako,Mallanna,Mandali,Marcellus,Marcellus SC,Marck Script,Margarine,Marko One,Marmelad,Martel Sans,Marvel,Mate,Mate SC,Maven Pro,McLaren,Meddon,MedievalSharp,Medula One,Megrim,Meie Script,Merge One,Merienda,Merienda One,Merriweather,Merriweather Sans,Mervale Script,Metal,Metal Mania,Metamorphous,Metrophobic,Miama,Michroma,Milonga,Miltonian,Miltonian Tattoo,Miniver,Miss Fajardose,Miss Saint Delafield,Modak,Modern Antiqua,Molengo,Molle,Monda,Monofett,Monoton,Monsieur La Doulaise,Montaga,Montez,Montserrat,Montserrat Alternates,Montserrat Subrayada,Moul,Moulpali,Mountains of Christmas,Mouse Memoirs,Mr Bedford,Mr Bedfort,Mr Dafoe,Mr De Haviland,Mrs Sheppards,Mrs Saint Delafield,Muli,Mystery Quest,Nanum Brush Script,Nanum Gothic,Nanum Gothic Coding,Nanum Myeongjo,Nanum Pen Script,NATS,Neucha,Neuton,New Rocker,News Cycle,Niconne,Nixie One,Nobile,Nokora,Norican,Nosifer,Nosifer Caps,Nothing You Could Do,Noticia Text,Noto Sans,Noto Sans Hebrew,Noto Sans Symbols,Noto Sans UI,Noto Serif,Nova Cut,Nova Flat,Nova Mono,Nova Oval,Nova Round,Nova Script,Nova Slim,Nova Square,NTR,Numans,Nunito,Odor Mean Chey,Offside,OFL Sorts Mill Goudy TT,Oldenburg,Old Standard TT,Oleo Script,Oleo Script Swash Caps,Open Sans,Open Sans Condensed,Oranienbaum,Orbitron,Oregano,Orienta,Original Surfer,Oswald,Overlock,Overlock SC,Over the Rainbow,Ovo,Oxygen,Oxygen Mono,Pacifico,Palanquin,Palanquin Dark,Paprika,Parisienne,Passero One,Passion One,Pathway Gothic One,Patrick Hand,Patrick Hand SC,Patua One,Paytone One,Pecita,Peddana,Peralta,Permanent Marker,Petit Formal Script,Petrona,Phetsarath,Philosopher,Piedra,Pinyon Script,Pirata One,Plaster,Play,Playball,Playfair Display,Playfair Display SC,Podkova,Poetsen One,Poiret One,Poller One,Poly,Pompiere,Ponnala,Pontano Sans,Poppins,Porter Sans Block,Port Lligat Sans,Port Lligat Slab,Prata,Preahvihear,Press Start 2P,Princess Sofia,Prociono,Prosto One,PT Mono,PT Sans,PT Sans Caption,PT Sans Narrow,PT Serif,PT Serif Caption,Puralecka Narrow,Puritan,Purple Purse,Quando,Quantico,Quattrocento,Quattrocento Sans,Questrial,Quicksand,Quintessential,Qwigley,Racing Sans One,Radley,Rajdhani,Raleway,Raleway Dots,Ramabhadra,Ramaraja,Rambla,Rammetto One,Ranchers,Rancho,Ranga,Rationale,Ravi Prakash,Redacted,Redacted Script,Redressed,Reenie Beanie,Revalia,Ribeye,Ribeye Marrow,Righteous,Risque,Roboto,Roboto Condensed,Roboto Slab,Rochester,Rock Salt,Rokkitt,Romanesco,Ropa Sans,Rosario,Rosarivo,Rouge Script,Rozha One,Rubik Mono One,Rubik One,Ruda,Rufina,Ruge Boogie,Ruluko,Rum Raisin,Ruslan Display,Russo One,Ruthie,Rye,Sacramento,Sail,Salsa,Sanchez,Sancreek,Sansation,Sansita One,Sarabun,Sarala,Sarina,Sarpanch,Satisfy,Scada,Scheherazade,Schoolbell,Seaweed Script,Sedan,Sedan SC,Sevillana,Seymour One,Shadows Into Light,Shadows Into Light Two,Shanti,Share,Share Tech,Share Tech Mono,Shojumaru,Short Stack,Siamreap,Siemreap,Sigmar One,Signika,Signika Negative,Simonetta,Sintony,Sirin Stencil,Six Caps,Skranji,Slabo 13px,Slabo 27px,Slackey,Smokum,Smythe,Sniglet,Snippet,Snowburst One,Sofadi One,Sofia,Sonsie One,Sorts Mill Goudy,Source Code Pro,Source Sans Pro,Source Serif Pro,Special Elite,Spicy Rice,Spinnaker,Spirax,Squada One,Sree Krushnadevaraya,Stalemate,Stalinist One,Stalin One,Stardos Stencil,Stint Ultra Condensed,Stint Ultra Expanded,Stoke,Strait,Strong,Sue Ellen Francisco,Sunshiney,Supermercado One,Suranna,Suravaram,Suwannaphum,Swanky and Moo Moo,Syncopate,Tangerine,Taprom,Tauri,Teko,Telex,Tenali Ramakrishna,Tenor Sans,Terminal Dosis,Terminal Dosis Light,Text Me One,Thabit,The Girl Next Door,Tienne,Tillana,Timmana,Tinos,Titan One,Titillium Web,Trade Winds,Trocchi,Trochut,Trykker,Tuffy,Tulpen One,Ubuntu,Ubuntu Condensed,Ubuntu Mono,Ultra,Uncial Antiqua,Underdog,Unica One,UnifrakturCook,UnifrakturMaguntia,Unkempt,Unlock,Unna,Vampiro One,Varela,Varela Round,Vast Shadow,Vesper Libre,Vibur,Vidaloka,Viga,Voces,Volkhov,Vollkorn,Voltaire,VT323,Waiting for the Sunrise,Wallpoet,Walter Turncoat,Warnes,Wellfleet,Wendy One,Wire One,Yanone Kaffeesatz,Yellowtail,Yeseva One,Yesteryear,Zeyada]

// Not all fonts support all weight styles, though most support 'normal' and 'bold' at least.
font_weight = "medium"; // [thin,light,normal,medium,bold,ultra-bold]

// Italic?
is_font_italic = "no"; // [no,yes]
font_italic = is_font_italic=="yes" ? true : false;

font = str(font_name,":style=",font_weight,font_italic?" italic":"");

text_fatness = text_fatness_percent/100 * text_height;

text_thickness =
    text_thickness_set==-2 ? -base_thickness :
    text_thickness_set==-1 ? -base_thickness/2 :
    text_thickness_set== 0 ? 0.1 :
    text_thickness_set;

color_text = [0.4,0.5,1.0]*1;
color_back = [0.2,0.2,0.9]*1;

/* ------------------------------ */

hole_margin_x =
    holes=="left" ? 1*(hole_dia + margin) :
    holes=="right" ? 1*(hole_dia + margin) :
    holes=="left+right" ? 2*(hole_dia + margin) :
    holes=="corners" ? 2*(hole_dia + margin) :
    0;
hole_margin_y =
    holes=="top" ? 1*(hole_dia + margin) :
    holes=="corners" ? 1/2*(hole_dia + margin) :
    0;

text_nudge_x =
    holes=="left"  ?  1/2*(hole_dia + margin) :
    holes=="right" ? -1/2*(hole_dia + margin) :
    0;

content_width  = hole_margin_x + text_width;
content_height = hole_margin_y + text_height;

module the_text() {
    color(color_text)
        translate([content_width/2+text_nudge_x,0,text_thickness<0 ? text_thickness-E : 0])
        linear_extrude(abs(text_thickness)+2*E)
        offset(r=text_fatness)
        resize([text_width,text_height,0])
        text(content,font=font,halign="center",valign="bottom");
}

module base2d() {
    o_delta = (margin_type!="round"?margin:undef);
    t_step_in = content_height-(content_height*(lobe_radius/100));
    l_radius = ((content_height+(border_thickness/4)+2*o_delta)*(lobe_radius/100))/2;
    offset(
            delta   = o_delta,
            r       = (margin_type=="round"?margin:undef),
            chamfer =  margin_type=="chamfer"
        )
        square([content_width,content_height]);

       if(margin_end_type=="rounded"){
            translate([0-border_thickness*4,content_height/2,0])
                circle(l_radius, $fn=100);

            translate([content_width,content_height/2,0])
                circle(l_radius, $fn=100);
      }

      if(margin_end_type=="rounded_left"){
            translate([0,content_height/2,0])
                circle(l_radius, $fn=100);
      }

      if(margin_end_type=="rounded_right"){
            translate([content_width+4*border_thickness,content_height/2,0])
                circle(l_radius, $fn=100);
      }

      if(margin_end_type=="triangular"){
          polygon(points=[[0-o_delta,0 - (o_delta) + t_step_in]
                            ,[0-(l_radius*2),content_height/2]
                            ,[0-o_delta,content_height - t_step_in + o_delta]]
                  ,paths=[[0,1,2]]);

          translate([content_width,0])
                 polygon(points=[[o_delta, 0 - (o_delta) + t_step_in]
                            ,[l_radius*2, content_height/2]
                            ,[o_delta, content_height - t_step_in + o_delta]]
                  ,paths=[[0,1,2]]);
      }

      if(margin_end_type=="triangular_left"){
            polygon(points=[[0-o_delta,0 - (o_delta) + t_step_in]
                            ,[0-(l_radius*2),content_height/2]
                            ,[0-o_delta,content_height - t_step_in + o_delta]]
                  ,paths=[[0,1,2]]);
      }

      if(margin_end_type=="triangular_right"){
            translate([content_width,0])
                 polygon(points=[[o_delta, 0 - (o_delta) + t_step_in]
                            ,[l_radius*2, content_height/2]
                            ,[o_delta, content_height - t_step_in + o_delta]]
                  ,paths=[[0,1,2]]);
      }
}

difference() {
    union() {
        translate([0,0,-base_thickness]) {
            color(color_back) linear_extrude(base_thickness,convexity=10) {
                difference() {
                    base2d();
                    if (holes=="left") {
                        translate([hole_dia/2,content_height/2]) circle(d=hole_dia);
                    } else if (holes=="right") {
                        translate([content_width-hole_dia/2,content_height/2]) circle(d=hole_dia);
                    } else if (holes=="left+right") {
                        translate([hole_dia/2,content_height/2]) circle(d=hole_dia);
                        translate([content_width-hole_dia/2,content_height/2]) circle(d=hole_dia);
                    } else if (holes=="top") {
                        translate([content_width/2,content_height-hole_dia/2]) circle(d=hole_dia);
                    } else if (holes=="corners") {
                        translate([hole_dia/2,content_height-hole_dia/2]) circle(d=hole_dia);
                        translate([hole_dia/2,hole_dia/2]) circle(d=hole_dia);
                        translate([content_width-hole_dia/2,content_height-hole_dia/2]) circle(d=hole_dia);
                        translate([content_width-hole_dia/2,hole_dia/2]) circle(d=hole_dia);
                    }
                }
            }
        }
        color(color_back) linear_extrude(border_thickness)
            difference() {
                base2d();
                offset(delta=-border_width) base2d();
            }

    }
    if (text_thickness<0) {
        the_text();
    }
}

if (text_thickness>=0) {
    the_text();
}
```


[User]
I need a design for a plug to fit inside a Topper Sport 16 gennaker pole. The basic shape is a cylinder with a wider flange at the top and a tapered section that connects the cylinder to the flange, plus a central hole through the entire thing.

The current design I have is fixed, but I need it to be parametric. Specifically, I want to be able to control:

*   The outer diameter of the main cylindrical part (the bit that fits inside the pole) - let's call this `plug_outer_diameter`.
*   The height of the main cylindrical part (`plug_cylinder_height`).
*   The outer diameter of the flange (`flange_outer_diameter`).
*   The height of the flange (`flange_height`).
*   The height of the tapered section connecting the cylinder and flange (`taper_height`).
*   The diameter of the central hole (`hole_diameter`).

I need the bottom of the tapered section to be flush with the bottom of the cylindrical part, and the top of the flange to extend up from the top of the tapered section. The central hole should go all the way through the plug. The flange should have a distinct edge, rather than a rounded one.

I'd prefer to have all of this contained within a single OpenSCAD file if possible. Please provide the file, using appropriate variable names, and $fn.

[Assistant]
topper_pole_plug.scad:
```
$fn=64;
difference() {
   union() {
      cylinder(r=28,h=20);translate([0,0,-3]) cylinder(r=30,h=3);
      translate([0,0,-8]) cylinder(r1=8,r2=30,h=5);
   }
   cylinder(r=4,h=60,center=true);
}

```


[User]
Hi, I'm looking to create a parametric design for a clip that will hold pan lids on the inside of cupboard doors. I want to be able to adjust it for different lid sizes and mounting screw specs, and I'd like the design to be relatively simple, composed of a base, an angled beam, and a curved "pie slice" element to grip the lid.

Here's what I'm envisioning:

*   **Base:** A rectangular block that will be mounted to the cupboard door. I need to control the size and height of this block.
*   **Beam:** A rectangular extension angled away from the base. I want to control the length of this, the angle relative to the base, and the thickness (which I think should be linked to the base size).
*   **Pie Slice:** A curved piece extending from the base designed to hold the lid. I think a 3D arc might be best here. This piece should allow for a fair amount of variation in pan lid sizes.
*   **Mounting Holes:** I need two holes through the base, one for the screw shaft and one countersunk for the screw head. I need to specify the diameters of both, and how deep the countersink hole needs to go so that the screw head sits flush.

I'd like the design to be parametric, so I can easily adjust all of these dimensions and parameters using OpenSCAD's customizer. The following parameters are needed:

*   `base_size`: side length of the base cube.
*   `base_height`: height of the base cube.
*   `mounting_hole`: diameter of the hole for the screw shaft.
*  `screw_head`: diameter of the countersunk hole for the screw head.
*   `keep`: how deep the countersink goes (the amount of the screw thread that will protrude before the screw reaches the door panel)
*   `beam_length`: the length of the angled beam
*  `angle`: angle of the beam
*   `beam_thickness`: thickness of the beam (should be equal to `base_size`)

I think that the `3D_arc` module in the provided code works well for my purposes. Please incorporate that into your solution. I don't need the `2D_arc` function, but keep the `3D_arc` function.

I'm also including a working prototype of this code so that you can see my intentions; it can be used for reference.

I'm not using any libraries in this request, but I am using some custom functions.

[Assistant]
pannendeksel_clip_custimizer.scad:
```
// 20150520 (c) Ewald Beekman
// this is the design for a clip to hold the lid of a pan on the inside of cupboard doors
// the design is parametric so it can be easily adjusted to any lid (or whatever you want to do with it)
//
// the design is made of three pieces, a base cube, a "piece of pie" and and a beam
// and two cylinders which make up for the recessed hole where the screw goes.
//
// the three pieces are in different colours so you can see what happens if you change the parameters

// the arc library is now included in this code so we can use customizer in Thingiverse
// use <arc.scad>
// arc.scad contains to functions:
// 2D_arc(w=thickness_of_arc, r=radius_of_arc, deg=degrees_of_arc_angle, fn=resolution);
// 3D_arc(w=thickness_of_arc, r=radius_of_arc, deg=degrees_of_arc_angle, fn=resolution, h=height_of_arc);

$fn=5*10;   // by using a multiply here, it won't show up in customizer

// size of the base, this is the base yellow brick
base_size=13;   //[3:30]

// the height of the yellow base brick
base_height=10; //[0:100]

// what diameter mounting screws are you going to use
mounting_hole=4;    //[2:10]

// what's the diameter of the screw head
screw_head=8;   //[2:16]

// how much length for the screw to grab om before it reaches the cupboard
keep=8; // [2:20]

//length of the part which angles away from the base
beam_length=30; //[0:100]

// thickness of the angled part is the same as the base size
beam_thickness=base_size;

// what's the angle you want, 0 means a square angle
angle=40;   //[0:90]

module beam() {
color("Green")
    translate([-base_size/2,base_size/2,base_height/2])
        rotate([angle,0,0])
            cube(size=[base_size,beam_length,beam_thickness]);
}
module pie() {
color("Red")
    translate([-(base_size/2),base_size/2,base_height/2])
        rotate([135,0,0])
            rotate([0,90,0])  //have to use 2x rotate because we need first y (this one), and then x
                3D_arc(w=base_size*2,r=0,deg=90,fn=50,h=base_size);
}

module brick() {
color("Yellow")
    cube(size=[base_size,base_size,base_height],center=true);   // this is our base block
}

// "drill" the two holes in the base cube
difference() {
//union(){         // for debug, if you uncomment this, and comment out "difference", cube and pie, you can see the cylinders
    union() {
       brick();
       pie();
       beam();
       }

// the is the hole for the screw
    cylinder(h=base_size*2, r=mounting_hole/2, center=true);

// and this the one for the screw head
// keep has to be subtracted with half base_height because the cube is positioned with center=true, so it floats on the x/y plane
    translate([0,0,keep - (base_height/2)])
        cylinder(h=base_size*2, r=screw_head/2 );
}

/*
Plot a 2D or 3D arc from 0.1 to ~358 degrees.

Set Width of drawn arc, Radius, Thickness, resolution ($fn) and height for the 3D arc. Arc is centered around the origin

By tony@think3dprint3d.com
GPLv3

*/

module 2D_arc(w, r, deg=90,fn = 100 ) {
        render() {
                difference() {
                        // outer circle
                        circle(r=r+w/2,center=true,$fn=fn);
                        // outer circle
                        circle(r=r-w/2,center=true,$fn=fn);

                //remove the areas not covered by the arc
                translate([sin(90-deg/2)*((r+w/2)*2),
                                                -sin(deg/2)*((r+w/2)*2)])
                        rotate([0,0,90-deg/2])
                                translate([((r+w/2))-sin(90-(deg)/4)*((r+w/2)),
                                                        ((r+w/2))*2-sin(90-(deg)/4)*((r+w/2))])
                                        square([sin(90-deg/4)*((r+w/2)*2),
                                                                sin(90-deg/4)*((r+w/2)*2)],center=true);
                translate([-sin(90-(deg)/2)*((r+w/2)*2),
                                                -sin(deg/2)*((r+w/2)*2)])
                        rotate([0,0,-(90-deg/2)])
                          translate([-((r+w/2))+sin(90-(deg)/4)*((r+w/2)),
                                                        ((r+w/2))*2-sin(90-(deg)/4)*((r+w/2))])
                                        square([sin(90-deg/4)*((r+w/2)*2),
                                                                sin(90-deg/4)*((r+w/2)*2)],center=true);
                }
                //line to see the arc
                //#translate([-((r)*2)/2, sin((180-deg)/2)*(r)]) square([(r+w/2)*2+1,0.01]);
        }
}

module 3D_arc(w, r, deg, h,fn) {
        linear_extrude(h)
                        2D_arc(w, r, deg,fn);

}
```


[User]
Okay, I'm looking to design a fully parametric direct drive extruder for 3D printers, and I want to make it as flexible as possible to accommodate various setups. I've seen some good examples but want a design I can adjust easily to different components and mounting needs.

Here are the key features I need:

*   **Filament Diameter:** It needs to support both 1.75mm and 3mm filament diameters, controlled by a variable, `filament_d`.
*   **Hobbed Gear:** The diameter of the hobbed section of the drive gear should be a customizable parameter, `gear_d`, so I can adjust for different gears. I'll need a way to adjust this precisely.
*   **Motor Alignment:** The design should let me choose which side the stepper motor is mounted on – either the right or the left side when looking at it from the front of the printer. This needs a `motor_alignment` parameter.
*   **Bowden Mount:** I need the option to include a mount for a press-fit bowden adapter. This should be a toggle with the `bowden_mount` variable.
*   **Bowden Extruder:**  I also need the flexibility to make it a full bowden extruder by using a bowden adapter instead of a direct-mounted hotend, a `bowden_extruder` variable would be great for this.
*   **Bowden Coupling Dimensions:**  If I'm using a bowden setup, I need to be able to set the outer diameter (`bowden_d`), threaded section outer diameter (`bowden_coupling_thread_d`), and threaded section height (`bowden_coupling_thread_h`) of the bowden coupling.
*   **Mounting Holes:** The mounting hole distance on the carriage needs to be adjustable with a `mounthole_dist` variable.
*   **Lever Bearing:** The lever arm needs a bearing with customizable outer diameter (`bearing_d`), height (`bearing_h`), and center bore diameter (`bearing_bore_d`). I'd also like to specify the washer diameter `bearing_washer_d`.
*   **Wall Thickness:** All walls should be set by an extrusion width (`extrusion_width`) multiplied by either `normal_wall_factor` or `thick_wall_factor` for standard or thick walls.
*   **Resolution:** The resolution of round objects should be set by a `fnr` variable which specifies the segment length.

I'd like it to be compatible with NEMA 17 stepper motors, and include screw hole cutouts. Please also add cutouts for M3 screws, nuts, and washers. I don't need specific models for the bolts and nuts but the sizes and dimensions should be set with M3 values for the various holes and cutouts and referenced by variables.

The design should include:
*   A main body with motor mounting holes, including the option for left/right motor alignment.
*   A lever arm with mounting and bearing features.
*   Cutouts for cable routing and filament path.

Could you create a parametric OpenSCAD model that can do all this? I'm imagining needing a few modules, maybe one for the extruder body, one for the lever, and another for the BOM. Include all necessary functions, including a function for creating custom cylinders with a variable `$fn` value, specified `enlarge` value, and an option to center it. Additionally, provide a function to rotate any object from a different center point and one for a centered cube (on one or more axes). Finally I will need a pythagoras function (for calculating various lengths). I don't need any external libraries for this but could potentially use some simple vector math functions (but nothing too crazy).

[Assistant]
dstruder.scad:
```
/*
Name: OpenSCAD model of a customizable direct drive extruder 1.75mm/3mm with J-Head/E3D/Bowden mount (V1.2)
Author: Jons Collasius from Germany/Hamburg

License: CC BY-NC-SA 4.0
License URL: https://creativecommons.org/licenses/by-nc-sa/4.0/
*/

/* [Global] */
// ######## global variables ########
// resolution of any round object (segment length, lower = more details)
fnr 						= 0.4;
// width of a single wall, should match your slicer settings
extrusion_width 			= 0.6;
// how many lines should a normal wall have (i.e. 0.6(extrusion_width)*6(normal_wall_factor)= 3.6mm wall width)
normal_wall_factor 			= 4;
// how many lines should a thick wall have
thick_wall_factor 			= 6;
// diameter of your filament. 3mm works fine with large nozzels (>=1mm diameter)
filament_d 					= 1.75;	// [1.75:1.75mm, 3:3mm]
// diameter of the hobbed section of your hobbed bolt. measure this as precisley as possible.
gear_d 						= 7.34;
// the alignment of the motor (seen from the front of the printer)
motor_alignment				= 0; //[0:motor on the right side,1:motor on the left side]
// would you like to create a mount for a press fit bowden adapter?
bowden_mount				= 1; //[0:no - without bowden mount,1:yes - with bowden mount]
// would you like to use a bowden adapter instead of a hotend (make a bowden extruder)
bowden_extruder				= 0; //[0:no - without bowden mount,1:yes - with bowden mount]
// outer diameter of your bowden tubing
bowden_d 					= 4.5;
// outer diameter of the threaded section of your bowden coupling
bowden_coupling_thread_d	= 9.75;
// hight of the threaded section of your bowden coupling
bowden_coupling_thread_h	= 10;
// mounting hole distance (should match the distance on your carriage)
mounthole_dist				= 20;
// diameter of the bearing of the lever
bearing_d 					= 16;
// hight of the bearing of the lever
bearing_h 					= 5;
// center bore diameter of the bearing of the lever
bearing_bore_d 				= 5;
// diameter of the appropriate washer for the bearing axle. this washer isn't used and only needed for calculations.
bearing_washer_d 			= 10;

/* [Hidden] */
// [screw_r, screw_head_r, screw_head_h, name]
screw_m3	= [1.6,		2.84,	3,		"screw M3"];
// [nut_r(biggest side), nut_d(smalles side), nut_h, name]
nut_m3		= [3.04,	5.5,	2.4,	"nut M3 DIN 934/ISO 4033/ISO 8673"];
// [washer_r, washer_h, washer_inner_r, name]
washer_m3	= [3.5,		0.5,	1.6,	"washer M3 DIN 125 A/ISO 7089"];
// [width, screw offset, screw_r, core_r, body_hight, axis_length, name]
nema17 		= [42.3,	15.5,	screw_m3[0],	11.20,	40,	24,	"NEMA 17 stepper motors"];

fan_titan_tfd_b5015_h = 14.77;

// ######## calculated variables ########
filament_r 					= filament_d/2;
gear_r 						= gear_d/2;
bearing_r 					= bearing_d/2;
bearing_bore_r 				= bearing_bore_d/2;
bearing_washer_r 			= bearing_washer_d/2;
bowden_r 					= bowden_d/2;
bowden_coupling_thread_r	= bowden_coupling_thread_d/2;
wall_width 					= extrusion_width*normal_wall_factor;
thickwall_width 			= extrusion_width*thick_wall_factor;
lever_width 				= nema17[5]-wall_width*2;

// ######## calculated variables ########
print_part();

// #####################################################################################################################################
module print_part() {
	mirror([0,motor_alignment,0]) {
		rotate([0,-90,0]) translate([0,0,0]) extruder();
		translate([0,-nema17[0]/2-lever_width-1-wall_width,nema17[0]/2]) rotate([-90,0,90]) lever();
		%translate([0,0,0]) rotate([180,0,0]) bom();
		%rotate([0,-90,0]) lever();
	}
}

// #####################################################################################################################################
module extruder() {
	difference() {
		union() {
			// main body
			rotate([0,90,0]) linear_extrude(height=nema17[5]) polygon(points=[[-15.5,-21.15],[-21.15,-15.5],[-21.15,15.5],[-15.5,21.15],[15.5,21.15],[21.15,15.5],[21.15,-15.5],[15.5,-21.15]]);
			// bottom round lever corner
			translate([0,nema17[1],-nema17[1]]) rotate([0,90,0]) fncylinder(r=nema17[0]/2-nema17[1], h=nema17[5]);
			if(bowden_mount) {
				// top bowden coupling mount
				translate([nema17[5]/2,gear_r+filament_r,nema17[0]/2-1]) fncylinder(r=bowden_coupling_thread_r+wall_width, h=bowden_coupling_thread_h+1);
			}
			if(bowden_extruder) {
				// bottom bowden coupling mount
				translate([nema17[5]/2,gear_r+filament_r,-nema17[0]/2-bowden_coupling_thread_h+1]) fncylinder(r=bowden_coupling_thread_r+wall_width, h=bowden_coupling_thread_h+1);
			} else {
				// bottom j-head mount
				translate([0,gear_r+filament_r,-nema17[0]/2-13-2]) centercube([nema17[5]/2,12+screw_m3[0]*2+washer_m3[0]*2,13+3],y=true);
				// bottom j-head mount top
				translate([0,gear_r+filament_r-(12+screw_m3[0]*2+washer_m3[0]*2)-1,-nema17[0]/2-13-2]) centercube([nema17[5]/2-1,12+screw_m3[0]*2+washer_m3[0]*2,13+1],y=true);
			}
			// carriage mounting
			for(i=[0,1]) translate([wall_width+washer_m3[0]+i*mounthole_dist,-nema17[0]/2+thickwall_width,0]) rotate([90,0,0]) fncylinder(r=wall_width+washer_m3[0], h=thickwall_width);
			translate([wall_width+washer_m3[0],-nema17[0]/2,0]) centercube([mounthole_dist,thickwall_width,(wall_width+washer_m3[0])*2],z=true);
		}
		// nema17 mounting holes
		rotate([0,90,0]) for(i=[0:2]) rotate([0,0,i*90-180]) translate([nema17[1],nema17[1],0]) fncylinder(r=nema17[2],h=nema17[5],enlarge=1);
		// center hole
		difference() {
			rotate([0,90,0]) fncylinder(r=pyth(a=nema17[1],b=nema17[1])-thickwall_width-screw_m3[0],h=nema17[5],enlarge=1);
			difference() {
				translate([-1,gear_r+filament_r-wall_width,nema17[1]]) centercube([nema17[5]+2,nut_m3[2]+1+wall_width*2,nut_m3[1]+wall_width*2],z=true);
				rotate([0,90,0]) fncylinder(r=nema17[3],h=nema17[5],enlarge=1);
			}
			if(bowden_extruder) translate([nema17[5]/2,gear_r+filament_r,0]) rotate([0,180,0]) fncylinder(r=filament_r+wall_width,h=nema17[0]);
		}
		// filament hole
		translate([nema17[5]/2,gear_r+filament_r,0]) rotate([0,0,0]) fncylinder(r=filament_r+0.25,h=nema17[0]*2,center=true);
		// bottom bowden hole
		if(bowden_extruder == 0) translate([nema17[5]/2,gear_r+filament_r,0]) rotate([0,180,0]) fncylinder(r=bowden_r,h=nema17[0]);
		// lever cutout bottom cylinder
		translate([-1,nema17[1],-nema17[1]]) rotate([0,90,0]) fncylinder(r=nema17[0]/2-nema17[1]+1, h=lever_width+wall_width+1.25);
		difference() {
			// lever cutout center
			translate([-1,0,0]) centercube([lever_width+wall_width+1.25,nema17[0]/2+1,bearing_r*2+2], z=true);
			if(bowden_extruder) translate([nema17[5]/2,gear_r+filament_r,-gear_r]) rotate([0,180,0]) fncylinder(r=filament_r+wall_width,h=nema17[0]);
		}
		// lever cutout, rotated 2°
		orotate([2,0,0],[0,nema17[1],-nema17[1]]) translate([-1,nema17[1]-1,0]) centercube([lever_width+wall_width+1.25,nema17[0]/2+1,nema17[0]+2], z=true);
		// lever fastener screw holes
		for(i=[-1,1]) translate([nema17[5]/2+i*(lever_width/2-4),nema17[0]/2,nema17[1]]) rotate([90,0,0]) fncylinder(r=screw_m3[0], h=nema17[0]/2+nema17[1]-wall_width-screw_m3[0]);
		// lever fastener nut hole
		translate([-1,gear_r+filament_r,nema17[1]]) centercube([nema17[5]+2,nut_m3[2]+1,nut_m3[1]],z=true);
		// top bowden coupling mount hole
		translate([nema17[5]/2,gear_r+filament_r,nema17[0]/2]) fncylinder(r=bowden_coupling_thread_r, h=bowden_coupling_thread_h+1);
		if(bowden_extruder) {
			translate([nema17[5]/2,gear_r+filament_r,-nema17[0]/2-bowden_coupling_thread_h-1]) fncylinder(r=bowden_coupling_thread_r, h=bowden_coupling_thread_h+1);
			translate([lever_width/2+wall_width,gear_r+filament_r*2+bearing_r,0]) rotate([0,90,0]) fncylinder(r=bearing_r+1, h=lever_width, center=true);
			rotate([180,90,0]) translate([0,0,-nema17[5]/2]) fncylinder(r=gear_r+1, h=lever_width, center=true);
		} else {
			// bottom j-head mount
			translate([nema17[5]/2,gear_r+filament_r,-nema17[0]/2-14-2]) fncylinder(r=16/2,h=13+2);
			translate([nema17[5]/2,gear_r+filament_r,-nema17[0]/2-14-1]) fncylinder(r=4,h=13+2);
			// bottom j-head mount screw holes
			for(i=[-1,1]) translate([0,gear_r+filament_r+i*(6+screw_m3[0]),-nema17[0]/2-14+5.5-1]) rotate([0,90,0]) fncylinder(r=screw_m3[0], h=nema17[5]/2,enlarge=1);
			// bottom j-head mount top
			translate([nema17[5]/2,gear_r+filament_r-(12+screw_m3[0]*2+washer_m3[0]*2)-1,-nema17[0]/2-14-2]) {
				translate([0,0,0]) fncylinder(r=16/2,h=4);
				translate([0,0,0]) fncylinder(r=12/2,h=10);
				translate([0,0,9]) fncylinder(r=16/2,h=6.5);
			}
			// bottom j-head mount top screw holes
			for(i=[-1,1]) translate([0,gear_r+filament_r+i*(6+screw_m3[0])-(12+screw_m3[0]*2+washer_m3[0]*2)-1,-nema17[0]/2-14+5.5-1]) rotate([0,90,0])
				fncylinder(r=screw_m3[0], h=nema17[5]/2,enlarge=1);
		}
		// carriage mounting screw holes
		for(i=[0,1]) translate([wall_width+washer_m3[0]+i*mounthole_dist,0,0]) rotate([90,0,0]) fncylinder(r=screw_m3[0], h=nema17[0]/2+1);
		// carriage mounting washer holes
		for(i=[0,1]) translate([wall_width+washer_m3[0]+i*mounthole_dist,0,0]) rotate([90,0,0]) fncylinder(r=washer_m3[0]+0.5, h=nema17[0]/2-thickwall_width);
	}
}

// #####################################################################################################################################
module lever() {
	difference() {
		union() {
			// main lever body
			translate([0,nema17[1],-nema17[0]/2+(nema17[0]/2-nema17[1])]) cube([lever_width+wall_width,nema17[0]/2-nema17[1],nema17[0]-(nema17[0]/2-nema17[1])]);
			// lever mouning post
			translate([0,nema17[1],-nema17[1]]) rotate([0,90,0]) fncylinder(r=nema17[0]/2-nema17[1], h=lever_width+wall_width);
			// bearing post
			translate([wall_width,gear_r+filament_r*2+bearing_r,0]) rotate([0,90,0]) fncylinder(r=bearing_washer_r, h=lever_width);
			translate([wall_width,gear_r+filament_r*2+bearing_r,-bearing_washer_r]) cube([lever_width,nema17[0]/2-(gear_r+filament_r*2+bearing_r),bearing_washer_r*2]);
		}
		// center cutout
		translate([wall_width,0,0]) difference() {
			translate([lever_width/2,0,0]) cube([bearing_h+2,nema17[0]+2,bearing_r*2+2], center=true);
			for(i=[-1,1]) translate([lever_width/2,gear_r+filament_r*2+bearing_r,0]) rotate([0,i*90,0])
				translate([0,0,bearing_h/2]) fncylinder(r=bearing_bore_r+1.3, r2=bearing_washer_r, h=1,enlarge=0.05);
		}
		// bearing mounting holes
		translate([wall_width,gear_r+filament_r*2+bearing_r,0]) rotate([0,90,0]) fncylinder(r=bearing_bore_r-0.15, h=lever_width,enlarge=1);
		// lever mouning post hole
		translate([0,nema17[1],-nema17[1]]) rotate([0,90,0]) fncylinder(r=screw_m3[0], h=lever_width+wall_width,enlarge=1);
		// tensioner cutouts
		for(i=[-1,1]) {
			translate([lever_width/2+wall_width+i*(lever_width/2-4),nema17[0]/2,nema17[1]]) {
				rotate([90,0,0]) fncylinder(r=screw_m3[0], h=nema17[0]/2-nema17[1],enlarge=1);
				translate([0,1,0]) rotate([90,0,0]) centercube([screw_m3[0]*2,nema17[0]/2-nema17[1]+1,nema17[0]/2-nema17[1]+2],x=true);
			}
		}
	}
	// the bearing
	%translate([lever_width/2+wall_width,gear_r+filament_r*2+bearing_r,0]) rotate([0,90,0]) fncylinder(r=bearing_r, h=bearing_h, center=true);
}

// #####################################################################################################################################
// motor, filament and gear
module bom() {
	// nema17 main body with screw holes
	linear_extrude(height=nema17[4]) polygon(points=[[-15.5,-21.15],[-21.15,-15.5],[-21.15,15.5],[-15.5,21.15],[15.5,21.15],[21.15,15.5],[21.15,-15.5],[15.5,-21.15]]);
	// nema17 axis
	translate([0,0,-nema17[5]]) fncylinder(r=2.5,h=nema17[5]);
	// nema17 center cylinder
	translate([0,0,-2]) fncylinder(r=nema17[3],h=2);
	// filament
	translate([0,-gear_r-filament_r,-nema17[5]/2]) rotate([0,90,0]) fncylinder(r=filament_r,h=nema17[0]*2,center=true);
	// filament gear
	translate([0,0,-nema17[5]/2]) rotate([0,0,0]) fncylinder(r=gear_r, h=bearing_h*2, center=true);
}

// #####################################################################################################################################
// a rewritten cylinder, with enlarge and dynamic fn
module fncylinder(r,r2,h,fn,center=false,enlarge=0){
	translate(center==false?[0,0,-enlarge]:[0,0,-h/2-enlarge]) {
		if (fn==undef) {
			if (r2==undef) {
				cylinder(r=r,h=h+enlarge*2,$fn=floor(2*r*3.14/fnr));
			} else {
				cylinder(r=r,r2=r2,h=h+enlarge*2,$fn=floor(2*r*3.14/fnr));
			}
		} else {
			if (r2==undef) {
				cylinder(r=r,h=h+enlarge*2,$fn=fn);
			} else {
				cylinder(r=r,r2=r2,h=h+enlarge*2,$fn=fn);
			}
		}
	}
}

// #####################################################################################################################################
// rotate the object from a different center
module orotate(rotate,offset) {
	translate(offset) rotate(rotate) translate(-offset) children();
}

// #####################################################################################################################################
// this cube can be centered on any axis
module centercube(xyz=[10,10,10],x=false,y=false,z=false) {
	translate([x==true?-xyz[0]/2:0,y==true?-xyz[1]/2:0,z==true?-xyz[2]/2:0]) cube(xyz);
}
// #####################################################################################################################################
// pythagoras yeah!
function pyth(a,b,c)			=(a==undef)?sqrt(pow(c,2)-pow(b,2)):(b==undef)?sqrt(pow(c,2)-pow(a,2)):(c==undef)?sqrt(pow(a,2)+pow(b,2)):undef;

```