[User]
Okay, I've got a project I'd like some help with. I want to generate a customizable Bahtinov mask for telescope focusing, but I want to make it really flexible. I've been using an existing SCAD file as a reference, but it's not as parametric as I need, and I want to start from a clean slate.

Essentially, I need a script that can generate a Bahtinov mask with the following characteristics:

**Core Parameters:**

*   **`focus`**: This is the telescope's focal length, and should be adjustable (numeric). Default value is around 185mm, but needs a wide range of say, 10-1000mm or more.
*   **`aperture`**: The diameter of the light path entering the telescope, also adjustable with a default around 58mm and a range of 30-200mm.
*   **`inner_Diameter`**: This is the inner diameter of the mask itself, adjustable again, defaulting to 66mm, range 31-250mm
*  **`mask_Height`**: The height or thickness of the mask itself, numeric, default is 2mm, range of 1-10mm
*   **`center_Hole_Diameter`**: The diameter of any hole in the center of the mask, such as for a secondary mirror holder, with a default of 0 (no hole), and a range of 0-90mm.
*   **`outer_Height`**: The height of an optional raised border around the outer edge, should have a range of 0 to 50mm with a default of 20mm.
*   **`inner_Height`**: A similar border, but around the center hole that can act as a handle. Can be negative to appear on the opposite side (should be easy to print) Default is zero, and ranges from -50mm to +50mm
*   **`split_Distance`**: Allows splitting the mask into 4 separate parts, for easier printing. A value of -1 indicates a single, non-split mask. Should range from -1 to 20mm.

**Advanced Parameters:**

*   **`part`**: Allows selection of a specific quadrant (top left, top right, bottom left, bottom right) for printing. If set to "all", all parts are printed.
*   **`bahtinov_factor`**: A factor used in calculating the slot size, defaults to 50 and ranges from 50-200.
*   **`slot_Size`**: The width of both the gaps and the bars in the Bahtinov pattern, automatically calculated if set to 0, adjustable between 0 and 10mm
*   **`central_bars_width`**: Width of the central bars, automatic if set to 0, and otherwise ranging from 0-20mm.
*    **`slots_Orientation`**: The angle of the slots, with default of 30 degrees and a range of 20 to 45 degrees.
*   **`split_layer_width`**:  The layer size used to calculate separation when splitting the mask, default 0.3.

**Behavior:**

*   The `slot_Size` should be automatically calculated based on the `focus` and `bahtinov_factor` if set to 0. The calculation in my reference file looks like this: `round(focus/bahtinov*100+0.5)/200`.
*   The `central_bars_width` should default to the same value as `slot_Size`, but should be independently adjustable.
*   If a `center_Hole_Diameter` is provided, the mask should be cut out using that value. Also, it must not cut through the Bahtinov pattern.
*   The `split_Distance` should separate the mask into 4 quadrants, with small connecting pieces to help with alignment if the `split_Distance` is above zero. If negative, it should render as a single part. The distance should be the distance from a corner to the start of the mask and the pattern.
*  When split, ensure there are some kind of connecting tabs with the proper tolerance for assembly. These tabs should extend from the outside of the mask and not the pattern.
*   When split, each quadrant should be centered at 0, 0 for ease of printing, and then moved into place using the `part` variable. If `part` is set to "all", then all four quadrants should render at once, with the default overall dimensions of the mask.
*   There should be an adjustable tolerance that is applied to the connecting tabs.
*   The OpenSCAD code should be properly commented so it is easy to understand.

I'd like the output to be a series of .scad files if that helps to better organize the code.  I'm not looking to use any specific libraries, so standard OpenSCAD features should be sufficient. I am planning to print this, so I also will need to be able to easily adjust $fn for print quality.

I hope this is clear. Let me know if you have any questions.

[Assistant]
Customizable_Splitable_Bahtinov_Mask_SigmaAPO70300.scad:
```
/*
 * A Bahtinov mask generator.
 * Units in mm, default values are for
 * a Sigma 70-300mm 1:4-5.6 APO lens.
 *
 * Copyright 2017, Andreas Dietz
 * License: CC-BY-SA
 *
 * Based on the work by Ella Astashonok
 *
 * Original design by Brent Burton
 * ver. 2.1.0
 */

/* [primary] */

// The telescope focus length
focus = 185; // [10:1000]

// The telescope light's path diameter.
aperture = 58; // [30:200]

// This is the inner diameter of the mask.
inner_Diameter = 66; // [31:250]

// Height of mask
mask_Height = 2; // [1:10]

// Diameter of secondary mirror holder. If no secondary, set to 0.
center_Hole_Diameter = 0; // [0:90]

// Height of outer border
outer_Height = 20; // [0:50]

//Inner border around center hole. Can be used as handle. 0 for no border. Negative values generate border on oposite side. Not recomended - hard to print.
inner_Height = 0; // [-50:+50]

// Split 4 parts distance (-1 for one pice mask)
split_Distance = -1; //[-1:20]

/* [Advanced] */

//Select part to print
part = "all"; //[tl:Top Left, tr:Top Right, bl:Bottom Left, br:Bottom Right, all: All parts]

// Bahtinov factor used for calculate slot size. (should be from 150 to 200. You shouldn't need to tweak this unless your slots are too narrow for printing, in which case, divide the factor by 3)
bahtinov_factor = 50; // [50:200]

// Width of the gaps and the bars (0-for auto calculate).
slot_Size = 0.8; // [0:10]

// Width of central bars (0 foor same as bars and gaps)
central_bars_width = 0; //[0:20]

// Angle of slots
slots_Orientation = 30; // [20:45]

// Layer size used to calculate separation distance when making splitted mask
split_layer_width = 0.3;

outerDiameter = inner_Diameter + 2 * mask_Height;
maskHeight=mask_Height;
outerHeight=outer_Height;
handle = inner_Height;
bahtinov = bahtinov_factor;
slotSize = slot_Size;
slotsOrientation = slots_Orientation;
central_bars = central_bars_width;
split_layer = split_layer_width;

layer = split_Distance >= 0 || part != "all" ? split_layer : 0;
gap = slotSize > layer*2 ? slotSize : getGap(focus, bahtinov) < layer*2 ? getGap(focus, bahtinov / 3)  : getGap(focus, bahtinov);
cBars1 = central_bars > 0 ? (central_bars > gap ? central_bars : gap) : gap;
cBars = cBars1 > layer*5 || split_Distance < 0 ? cBars1 : layer*5;
centerHoleDiameter = center_Hole_Diameter > 0 && center_Hole_Diameter < cBars ? cBars : center_Hole_Diameter;
splitDistance = split_Distance > 0 && split_Distance < cBars ? cBars : split_Distance;
split = part != "all" && splitDistance < cBars*2 ? cBars*2 : (splitDistance < 0 ? 0 : splitDistance);
//split = splitDistance < 0 ? 0 : splitDistance;
handleHeight = abs(handle);
echo("Gap size: ", gap);

print_main(part);

function getGap(focus, bahtinov) = round(focus/bahtinov*100+0.5)/200;

/* create a series of bars covering roughly one half of the
 * scope aperture. Located in the +X side.
 */
module bars(gap, width, num=5, split) {
    num = round(num);
    for (i=[-num:0]) {
        translate([width/2+split,i*2*gap-split+gap]) square([width,gap], center=true);
    }
    for (i=[0:num]) {
        translate([width/2+split,i*2*gap+split+gap]) square([width,gap], center=true);
    }
}

module bahtinovBars(gap,width, split) {
    numBars = round(aperture/2 / gap / 2 + 0.5);
    // +X +Y bars
	 translate([split, split, 0])
	 intersection() {
		rotate([0,0,slotsOrientation]) bars(gap, width, numBars, 0);
		square([outerDiameter/2, outerDiameter/2], center=false);
	 }
	 // +X -Y bars
	 translate([split, -split, 0])
	 intersection() {
		rotate([0,0,-slotsOrientation]) bars(gap, width, numBars, 0);
		translate([0,-outerDiameter/2]) square([outerDiameter/2, outerDiameter/2], center=false);
	 }
	 // -X bars
	 rotate([0,0,180]) bars(gap, width, numBars, split);
}

$fn=300;
module bahtinov2D() {
    width = aperture/2+1;
    difference() {                          // overall plate minus center hole
        union() {
				difference(){							  // trims the mask to aperture size

					for( pos = [0:3]){
							rotate([0, 0, pos*90])
								translate([split, split])
									circle(r=aperture/2+1);
					}
	            bahtinovBars(gap,width, split);
				}

				for( pos = [0:90:359]){
					rotate([0, 0, pos])
						translate([split, split])
							intersection(){
								difference() {                  // makes the outer margin
	            				circle(r=outerDiameter/2);
	            				circle(r=aperture/2);
	            			}
								translate([0,layer/2,0]) square([outerDiameter/2, outerDiameter/2]);
							}
				}

            // Add center hole margin if needed:

            if (centerHoleDiameter > 0) {
					for(i = [0:90:359])
						rotate([0,0,i])
							translate([split, split])
                			intersection(){
									circle(r=(centerHoleDiameter+gap)/2);
									square([centerHoleDiameter/2+gap, centerHoleDiameter/2+gap]);
								}
            }

        	}//union

         // Add center hole if needed:
			if (centerHoleDiameter > 0) {
				for(i = [0:90:359])
					rotate([0,0,i]){
	               intersection(){
							translate([split, split])
								circle(r=centerHoleDiameter/2);
							square([centerHoleDiameter/2+split,centerHoleDiameter/2+split]);
						}
					}
			}

		}//difference

}

module fakeMask(){
	for(i=[0:90:359]){
		rotate([0,0,i])
			intersection(){
				translate([split,split,0])
					difference(){
						cylinder(r=outerDiameter/2, h=maskHeight);
						translate([0,0,-1])cylinder(r=centerHoleDiameter/2, h=maskHeight+2);
					}
				cube([outerDiameter/2+split,outerDiameter/2+split,maskHeight]);
			}
	}
}

module triangleX(x, y, z){
		translate([0, y/2,0])
       rotate([90,0,0])
			linear_extrude(height=y) polygon(points=[[0, 0],[x, 0],[0, z]], path=[[0,1,2]]);
}

module connector(width, height, depth, layer){
	w1 = width*3/2-layer*2;
	w2 = width/2-layer*2;
	h = height;
	translate([0,0,-depth/2])
		linear_extrude(height=depth)
			polygon(points=[[-w1/2, h/2], [w1/2, h/2], [w2/2, -h/2], [-w2/2, -h/2]], path=[0,1,2,3]);
}

module horisontalSplit(length,height,depth,connector_width,split){
		// Add split structural bars
		bar_hgt = height / 6;
		connector_hgt = height*2/3;
		union(){
			//%cube([cBars,layer,3],true);
			difference(){
				union(){
					translate([split+length/2,(split-bar_hgt/2+height/2), 0]) //bar1
						cube([length, bar_hgt, depth], true);
					translate([split+length/2, -(split-bar_hgt/2+height/2), 0]) //bar2
						cube([length, bar_hgt, depth], true);
				}
				if(centerHoleDiameter<=0)
					translate([split,0,-1]) //bar2
						cube([height*2/3, split*2+height, depth+2], true);
				else
					union(){
						translate([split-centerHoleDiameter/2+gap/2,split,-depth/2-1]) //bar2
							cylinder(r=centerHoleDiameter/2, h=depth+2);
						translate([split-centerHoleDiameter/2+gap/2,-split,-depth/2-1]) //bar2
							cylinder(r=centerHoleDiameter/2, h=depth+2);
					}
			}
			intersection(){
				for(i=[connector_width*3/2-bar_hgt*3:connector_width*2:length+connector_width]){
					translate([i+split,-(split-connector_hgt/2+height/2-bar_hgt+layer),0])
						connector(connector_width-layer/2, connector_hgt, depth, layer);
					//if(i+connector_width*2 <= length+connector_width*2/3)
					translate([i+split+connector_width,split-connector_hgt/2+height/2-bar_hgt+layer,0])
					rotate([0,0,180])
						connector(connector_width-layer/2, connector_hgt, depth, layer);
				}
				translate([split+length/2/*+height/2-bar_hgt-layer*/, 0, 0])
					cube([length, split*2+height, depth], true);

			}
		}

}

module cylinderLocks(dOut,dIn,w,lock_h,layer,split){
	//Making outer border lock
	assign(wall = (dOut-dIn)/2)
 		for(i=[0:90:359]){ //outer lock
	 		rotate([0,0,i])
	   	translate([split,split,0]){
				intersection(){ //OuterLock
					difference(){
						cylinder (r=dOut/2, h=lock_h); //Outer wall
						cylinder (r=dOut/2-(wall/2)+layer/2, h=lock_h); //Inner wall
	    			}
					translate([0,-w/3+layer,0])
						cube([dOut/2,w*2/3-layer,lock_h]);
				}
				rotate([0,0,90])
				intersection(){ //InterLock
					difference(){
						cylinder (r=dOut/2-(wall/2)-layer/2, h=lock_h); //Outer wall
						cylinder (r=dIn/2, h=lock_h); //Inner wall
	    			}
					translate([0,-w/3,0])
						cube([dOut/2,w*2/3-layer,lock_h]);
			}
		}
 }
}

module print_main(part="all"){
	echo ("Printing part:", part);

	translate([part!="all"?(outerDiameter/4+split/2):0,part!="all"?(outerDiameter/4+split/2):0,0])
	rotate([0,0,part=="tl"?90:part=="tr"?180:part=="br"?-90:0])
	intersection(){
		union() {
		difference(){
		union() {

		    linear_extrude(height=maskHeight) bahtinov2D();
			 //fakeMask();

			 //Outer Border
		    if(outerHeight > 0){
			 	for(i=[0:90:359]){
					rotate([0,0,i])
					  translate([split,split,maskHeight]){
							difference(){
								intersection(){
						    		union(){
										difference(){
											cylinder (r=outerDiameter/2, h=outerHeight-maskHeight); //Outer wall
											translate([0,0,-1])
												cylinder (r=outerDiameter/2-(maskHeight), h=outerHeight-maskHeight+2); //Inner wall
						    			}
									}
									cube([outerDiameter/2,outerDiameter/2,outerHeight-maskHeight]);
								}
							}
					  }
				}
			 }

			 //Inner border / handle
			 assign(ht=handle<0?handleHeight:handleHeight-maskHeight)
		    if(handleHeight > 0){
				if (centerHoleDiameter > 0){
					translate([0,0,handle<0?handle-maskHeight:0])
					union(){
						for(i=[0:90:395]){
							rotate([0,0,i])
							  translate([split,split,maskHeight]){
									difference(){
										intersection(){
							    			difference(){
												cylinder (r=(centerHoleDiameter+gap)/2, h=ht); //Outer wall
												translate([0,0,-1])
													cylinder (r=(centerHoleDiameter)/2, h=ht+2); //Inner wall
							    			}
											//translate([0,0,0])
											cube([centerHoleDiameter/2+gap/2,centerHoleDiameter/2+gap,ht]);
										}
									}
							  }
						}
					}//union
				}//holeDiameter > 0
			 }//Handle

		}//union
			//Split parts
			assign(maxpl= max(outerHeight,maskHeight,handle>0?handle:0))
			assign(maxh = max(maskHeight, handleHeight, outerHeight, maxpl-handle))
			{
				echo("maxh:",maxh," maxpl:",maxpl," handle:",handle);
				translate([0,0,(handle<0?(maxpl+handle)/2:maxpl/2)]){//(maxh/2)*sign(handle)+(handle<0?maskHeight:0)]){
					cube([outerDiameter+split*2,cBars*2/3+split*2,maxh+2],true);
					cube([cBars*2/3+split*2,outerDiameter+split*2,maxh+2],true);
				}
			}
		}//difference
			 //Make connectors
			 assign(
				con_delta = (centerHoleDiameter > 0 ? (centerHoleDiameter)/2-(cBars/4-cBars/12) : 0),
				con_length=outerDiameter/2-(centerHoleDiameter > 0 ? (centerHoleDiameter)/2 : 0)
			 )
			 for(i=[0:90:359]){
				rotate([0,0,i])
					intersection(){
						difference(){
							translate([con_delta,0,maskHeight/2]){
								if(splitDistance>=0 || part != "all")
									horisontalSplit(con_length, cBars, maskHeight, cBars, split);
								else
									translate([con_length/2,0,0])
										cube([con_length, cBars,maskHeight],true);

							}
							intersection(){
								union(){
									translate([split,split,-1])
										cylinder(r=(centerHoleDiameter+gap)/2+layer, h=maskHeight+2);
									translate([split,-split,-1])
										cylinder(r=(centerHoleDiameter+gap)/2+layer, h=maskHeight+2);
								}
								translate([split+outerDiameter/4,0,maskHeight/2])
									cube([outerDiameter/2,cBars*2/3+split*2,maskHeight+2],true);
							}
						}
						union(){
							translate([split,split,-1])
								cylinder(r=outerDiameter/2-maskHeight-layer, h=maskHeight+2);
							translate([split,-split,-1])
								cylinder(r=outerDiameter/2-maskHeight-layer, h=maskHeight+2);
						}
					}
			 }

			 //Making outer border lock
			 cylinderLocks(outerDiameter,outerDiameter-maskHeight*2,cBars,outerHeight > 0 ? outerHeight : maskHeight,layer,split);

			 //Making inner border lock
			 if(centerHoleDiameter > 0)
				assign(ht=handle<0?handleHeight:handleHeight-maskHeight)
				translate([0,0,handle<0?handle:0])
					assign(h=handle != 0 ? (maskHeight+(handle>0?handleHeight-maskHeight:handleHeight)) : maskHeight)
			 		cylinderLocks(centerHoleDiameter+gap,centerHoleDiameter,cBars,h,layer,split);

		}//union
		if (part != "all"){
			if (part == "tl"){
				translate([-(outerDiameter/2+1+split),0,handle < 0 ? handle : 0])
					cube([outerDiameter/2+1+split,outerDiameter/2+1+split,maskHeight+max(handleHeight, outerHeight, outerHeight-handle)]);
			}
			if (part == "tr"){
				translate([0,0,handle < 0 ? handle : 0])
					cube([outerDiameter/2+1+split,outerDiameter/2+1+split,maskHeight+max(handleHeight, outerHeight, outerHeight-handle)]);
			}
			if (part == "bl"){
				translate([-(outerDiameter/2+1+split),-(outerDiameter/2+1+split),handle < 0 ? handle : 0])
					cube([outerDiameter/2+1+split,outerDiameter/2+1+split,maskHeight+max(handleHeight, outerHeight, outerHeight-handle)]);
			}
			if (part == "br"){
				translate([0,-(outerDiameter/2+1+split),handle < 0 ? handle : 0])
					cube([outerDiameter/2+1+split,outerDiameter/2+1+split,maskHeight+max(handleHeight, outerHeight, outerHeight-handle)]);
			}

		}
	}//intersection

}//main_print

```


[User]
I'm looking to create an automatic plant waterer using a standard soda bottle, and I'd like to design it in OpenSCAD. I have a basic idea of how it should work, and I've seen some examples, but I want something that's really customizable.

Here's what I'm thinking: The waterer will consist of a base with a hole to glue a soda bottle cap into. The bottle, filled with water, screws onto this cap, and water slowly drips out into the soil. I need a couple of landscaping nails to secure the base to the ground.

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

*   `real_cap_diameter`: The actual diameter of the bottle cap I'll be using.
*   `cap_height`: The height of the bottle cap.
*   `diameter_of_landscaping_nails`: The diameter of the landscaping nails I'll use.
*   `wingspan`: The overall width of the base, determining how far the nail holders extend from the center.
*   `wing_width`: The width of the arms connecting the nail holders to the central hub.
*   `wall_thickness`: The thickness of the base material.
*   `number_of_wings`: The number of nail holders around the base (typically 3 for stability).
*   `tolerance_for_glue`: How much larger the hole for the cap should be to account for glue.
*   `drip_hole_diameter`: The diameter of the hole at the very bottom where the water drips out.

The design should have a central hub where the bottle cap will be glued.  Extending outwards from this hub will be the "wings" that terminate in the "nacelles", where the landscaping nails will go. The base should have a funnel shape below the cap to direct water down to the drip hole. It would be great if you could provide a single `.scad` file that generates this with all the parameters. I'd also like to make sure I can easily see what each of the parts of the design looks like individually, and combined.

[Assistant]
automatic_plant_waterer.scad:
```
//Watering For soda bottle
//Ari Diacou
//March 2017
/*/////////////////////// Instructions ////////////////////////////
This automatic waterer uses bottle with a screw on cap. The cap is glued into the base, and then a hole is popped in the cap (with a drill or nail) the base is nailed into the ground near one of your plants. The bottle is filled with water, and then screwed in upside down into the cap.
1. Take measurements of the cap height, cap diameter, and landscaping nail diameter. Puch those into Customizer/OpenSCAD file.
2. Render/Export.
3. Print with supports. You should only need them for the overhang for the cap.
4. Remove supports.
5. With a nail or drill bit, make a hole in the cap of your bottle.
6. Place glue (anything waterproof: Wood Glue, silicone caulk, Goop, superglue gel, PVC pipe cement, avoid: white/PVA/school glue, gorilla glue, might work: tacky glue, contact cement) on sides of cap, base overhang (not in the funnel), and on sides of the cap recess in the base.
7. Place cap into the base, swirl around so you have an even distribution of glue in the gap between the cap and the base. Wipe away excess glue with a damp paper towel/napkin/tissue.
8. Turn upside down onto some Saran wrap or aluminum foil, wipe away excess glue with a damp paper towel/napkin/tissue, and allow the glue to cure per manufacturers instructions.
9. Remove the base from your drying sheet.
10. Place the base, cone side down, near the plant you want to water. It should be close enough to the plant, that the water will go to the roots, but far enough away that you can (un)screw the bottle from the base without interfering with the plant as it grows.
11. Fit the landscaping nails into the holes in the nacelles, and happer them into the ground, making sure the base is level.
12. Fill the bottle with water.
13. Turn the bottle over and screw it into the base.

FAQ/Troubleshooting:
1. How does it work? As the soil dries out, water from the bottle will displace air in the soil, and water the soil. When the soil is saturated, there will be no air to bubble up the bottle and displace water in the bottle. If the seal between the bottle and the cap is air tight, this should keep the soil at a constant moisture.
2. It's not working, no water is coming out. Either you forgot to tap a hole in the cap, or glue clogged the funnel. Drill a hole from the cap to the tip.
3. It's not working, there is a small wet patch, but the plant isn't getting it. Your plant could be too far away (>12”), the hole in your cap could be too small, or your soil has too much clay in it.
4. Water spills out the top of the base. The seal between the cap and the bottle is not good enough. Try screwing it down a bit more, maybe there is some dirt at the bottom of the cap, that prevents a good seal. Maybe your cap has cracked or deformed.
5. I don't drink liquor or soda, because I am a wino. How can I get this to work? I cant help you if you drink boxed wine (although BotaBox is better than Franzia). For wine bottles, maybe try to increase the “cap_height” to somehting like 3 inches. Measure the width of the bottle at this distance down the neck, add 2-4 mm to this. Set this number to the “cap diameter”. Print the base per steps 1-4. Coat the top of the bottle and the neck with Silicone caulk to create a waterproof O-ring. Allow to dry seperately from the base. Once dry, using a very sharp utility knife, cut away excess silicone so that the bottle makes a perfect flat seal with the base. The water will leak out if the bottle gets tilted, allowing air into the base.
6. It's august, my cap is leaking, and it looks all deformed, what happened? You were probably using PLA, not ABS. PLA deforms at a relatively low temperature.

*///////////////////////// Parameters //////////////////////////////
// preview[view:east, tilt:bottom]

//Measure the diameter of the cap of the bottle you will be using
real_cap_diameter=25;
//Measure the height of the cap you will be using
cap_height=15;
//Measure the ones you bought
diameter_of_landscaping_nails=8;
//How wide do you want this to be?
wingspan=100;
//The width of the wings that attach the "nacelles" to the central hub
wing_width=5;
//The thickness of the hub and the nacelles
wall_thickness=3;
//is the number of landscaping spikes that will secure the base
number_of_wings=3;
//The hole for the cap is this much bigger than the cap, to allow for glue volume
tolerance_for_glue=3;
//The hole in the tip that allows the water to flow into the soil
drip_hole_diameter=4;

///////////////////// Derived Parameters //////////////////////////
ep=0.05+0;
cap_diameter=real_cap_diameter+tolerance_for_glue;
base_height=cap_height+wall_thickness;
nacelle_width=diameter_of_landscaping_nails+2*wall_thickness;
hub_diameter=cap_diameter+2*wall_thickness;
wing_length=wingspan/2-nacelle_width/2;
tip_depth=base_height*2.5;
////////////////////////// Main() /////////////////////////////////
difference(){
    union(){
        tip();
        linear_extrude(base_height)
            base();
        }
    hollow();
    }

//////////////////////// Functions ////////////////////////////////
module base(){
    circle(d=hub_diameter);
    for(i=[0:number_of_wings-1])
        rotate([0,0,i*360/number_of_wings]) wing();
    }

module hollow(){
    translate([0,0,-ep])
        cylinder(d=cap_diameter,h=cap_height);
    translate([0,0,cap_height-2*ep])
        cylinder(d1=cap_diameter-2*wall_thickness,d2=0,h=tip_depth-2*wall_thickness);
    cylinder(d=drip_hole_diameter,h=1.01*(tip_depth+base_height),$fn=40);
    }

module tip(){
    translate([0,0,base_height-ep])
        cylinder(d1=hub_diameter,d2=0,h=tip_depth);
    }

module wing(){
        difference(){
            union(){
                translate([0,-wing_width/2])
                    square([wing_length,wing_width]);
                translate([wing_length,0])
                    circle(d=nacelle_width);
                }
            translate([wing_length,0]) circle(d=diameter_of_landscaping_nails);
            }
    }
```


[User]
I'm looking to create a customizable manipulative for teaching geometry, specifically about angles and circles. I'd like it to be a disk with several key features:

1.  **Disk Base:** A circular disk with a diameter that I can adjust, along with its thickness. I'd like to be able to specify the fillet radius for the edges.

2.  **Radial Vectors:** I need to have lines (vectors) radiating outwards from the center, spaced equally around the circle. I'll need to control how many vectors there are, their length, width, height above the disk, and how far from the center they start (their offset distance).

3.  **Circumference Holes:**  I need evenly spaced holes around the circumference of the disk. The number of holes should match the number of radial vectors (or be derived from that) and be of a specified diameter. Also, I need a single hole in the very center of the disk.

I'm thinking of using this with rubber bands and small nails to demonstrate angle relationships, so a tight fit on the nails is important. I'd like to be able to set the diameter of the nail hole as a variable.

Could you design this for me in OpenSCAD, making sure all these parameters are adjustable?

[Assistant]
inscribed_angle_disk.scad:
```
/*
Created by Erich Simon, 3/17/17
First modeled in Inventor 2016, then converted to OpenSCAD to allow for customization in thingiverse
*/

///////////////////////User Inputted Variable/////////////////////////////////

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

//Number of vectors equally spaced around circle
Vector_Number=36;

//diameter of disk (6" a good size, set to 152.4 if your printer/slicer thinks in mm and you want exactly 6")
Disk_Diameter=150;

//thickness of the disk (set to 6 for about 1/4" thick)
Thickness=6;

//Fillet around edge
fillet = 6;

//Ray length
Ray_Length=55;

//Ray width
Ray_Width=1;

//Ray Height above disk
Ray_Height=0.8;

//Ray distance from center
Ray_Distance_From_Center=10;

//hole diameter (0.8 to 0.9mm good for a 5/8" diameter nail to fit tightly)
Hole_Diameter=0.9;

//smoothness of circle (>60 looks like a circe, less looks lmoreike a polygon)
//$fn=100;
//////////////////////////Program/////////////////////////

difference(){
    disk();
    hole();
    for(i=[0:Vector_Number]){
        Rotate_Angle=(360/Vector_Number)*i;
        rotate(Rotate_Angle,[0,0,1]){translate([0,Disk_Diameter/2-fillet,0]){hole();}}
        }
}
    for(i=[0:Vector_Number]){
        Rotate_Angle=(360/Vector_Number)*i;
        rotate(Rotate_Angle,[0,0,1]){vector();}
        }

/////////////////////////Modules//////////////////////////
module disk(){
    difference(){
        minkowski(){
            $fn=100;
            cylinder(r=Disk_Diameter/2-fillet, h=Thickness);
            sphere(fillet);
            }
        translate([0,0,-Thickness-fillet]){cylinder(r=Disk_Diameter,h=Thickness+fillet);}
    }
}

module vector(){
    minkowski(){
        $fn=60;
        translate([-Ray_Width/4,Ray_Distance_From_Center,Thickness+fillet]){cube([Ray_Width/2, Ray_Length, Ray_Height]);}
        sphere(r=Ray_Width/2);
    }
}

module hole(){
    translate([0,0,2]){cylinder(r=Hole_Diameter/2, h= Thickness+fillet);}
}
```


[User]
Okay, I'm looking to create some customizable cable clips, and I think I need an OpenSCAD file or maybe a few to accomplish this. I'd like to be able to generate a few different types of clips, specifically:

1.  **Double Clip:** This clip would hold two cables, or a cable and a rod. I need to be able to specify the diameter of each cable/rod opening.
2.  **Twisted Double Clip:** This is similar to the double clip, but one of the openings is rotated relative to the other. I need to control the twist angle. I'd also like some way to handle the ledges of the twisted clip automatically when it is being printed so it adheres to the platform, but I also need to be able to turn that off, if desired.
3.  **Open Clip with Flap:** This clip would have a single cable opening and then a flap that extends out and has a screw hole in it. I need to control the length of this flap and the position of the screw hole on the flap.
4.  **Open Clip with Crossed Flap:**  Similar to the open clip with flap but it has a flap that crosses over the cable.
5.  **Single Clip:**  Just a basic single cable clip.

Here are the parameters I think I need to control for all of these:

*   **`thickness`**: The overall thickness of the clip material.
*   **`cable_diameter`**: The inner diameter of the main cable opening.
*   **`opening_angle`**: The angle of the opening in the clip (less than 180 for all clips).
*   **`rod_diameter`**: The inner diameter of the second opening in the double clip, this should be zero to disable a second opening in any clip.
*   **`screw_diameter`**: The diameter of the screw hole in the clips that have a flap.
*   **`chamfer`**: A chamfer on the edges for a nicer finish (this can be 0)
*   **`twist_angle`**: The rotation of the second opening of the twisted clip (only used on that clip).
*   **`height`**: Overall height of the clip (if 0, the program should auto-determine this).
*   **`screw_position`**: Position of the center of the screw hole from the cable center (if 0, the program should auto-determine this).
*   **`flap_length`**: Length of the flap from the cable center (if 0, the program should auto-determine this).
*  **`opening_rounding_radius`**: Radius of the curve in the opening area, 0 for auto.
*   **`twisted_clip_cut`**: Whether to cut the ledges on the twisted clip, set this to "auto" to automatically decide.

I would prefer to have all of this in one, or at most a small handful of files. I think this covers all the requirements, let me know if you need any other information.

[Assistant]
cable-clip.scad:
```
part = "demo"; // [rod:Double clip,twisted:Twisted double clip (may require support for printing),flap:Open clip with flap,cross_flap:Open clip with flap crossed,single:Single clip,demo:Demo]

thickness = 1.5; // [0.2:0.1:10]
// Clip inner diameter
cable_diameter = 5.5; // [2:0.5:100]
opening_angle = 110; // [0:179]
// Second clip inner diameter for Double clips, set to 0 to disable
rod_diameter = 7.5; // [0:0.5:100]
screw_diameter = 4; // [0:0.5:20]
// This is set to 0 by default for faster preview. Set to e.g. 0.25 before rendering for smooth edges.
chamfer = 0; // [0:0.05:2]
// Twist angle for Twisted double clip
twist_angle = 90; // [-90:90]

/* [More settings] */

// Clip height, 0 for auto
height = 0; // [0:100]
// Position of the screw hole in the flap from cable center, 0 for auto
screw_position = 0; // [0:100]
// Length of the flap from cable center, 0 for auto
flap_length = 0; // [0:100]
// 0 for auto
opening_rounding_radius = 0; // [0:0.2:50]
// Cut the ledges of the twisted clip so it adheres to the platform
twisted_clip_cut = "auto"; // [auto,no]

/* [Hidden] */

$fn=32;

real_opening_rounding_radius = (opening_rounding_radius==0?thickness:max(opening_rounding_radius,thickness/2));
real_height = (part=="flap"?max(height,screw_diameter*2,cable_diameter+2*thickness):(height==0?(part=="cross_flap"?cable_diameter:max(cable_diameter,rod_diameter))+2*thickness:height));
real_screw_position = part=="cross_flap"?max(screw_position,cable_diameter/2+thickness+screw_diameter):max(screw_position,cable_diameter/2+real_opening_rounding_radius*2+screw_diameter);
real_flap_length = part=="cross_flap"?max(flap_length,real_screw_position+cable_diameter/2+thickness):max(flap_length,real_screw_position+real_height/2);

echo(str("Rounding radius: ",real_opening_rounding_radius));
echo(str("Height: ",real_height));
echo(str("Screw position: ",real_screw_position));
echo(str("Flap length: ",real_flap_length));

module ring(dia,thickness,angle,chamfer)
{
    difference() {
        circle(d=dia+2*thickness-2*chamfer);
        if (dia>0)
            circle(d=dia+2*chamfer);
        l=dia/2+thickness+1;
        if (angle < 180) {
            polygon([[0,0],[0,l],[-l,l],[-l,0],[-l,-l*tan(angle-90)]]);
        } else {
            polygon([[0,0],[0,l],[-l,l],[-l,0],[-l,-l],[l,-l],[l,l*tan(angle-90)]]);
        }
    }
}

module flap_clip()
{
    module section()
    {
        ring(cable_diameter,thickness,opening_angle,chamfer);

        dist=cable_diameter/2+real_opening_rounding_radius;
        translate([.001,-.001])
            rotate(opening_angle)
                translate([0,dist])
                    circle(r=real_opening_rounding_radius-chamfer);

        translate([-real_flap_length+chamfer,cable_diameter/2+chamfer])
            square([real_flap_length-chamfer,thickness-2*chamfer]);
    }

    difference() {
        translate([0,0,chamfer])
            linear_extrude(real_height-2*chamfer)
                section();

        translate([-real_screw_position,cable_diameter/2-1,real_height/2])
            rotate([-90])
                cylinder(d=screw_diameter+2*chamfer,h=thickness+2);
    }
}

module cross_flap_clip()
{
    module section()
    {
        rotate(-90-opening_angle/2)
            ring(cable_diameter,thickness,opening_angle,chamfer);

        dist=cable_diameter/2+real_opening_rounding_radius;
        for (mm=[0,1]) {
            mirror([0,mm,0])
                translate([-.001,-.001])
                    rotate(-opening_angle/2)
                        translate([dist,0])
                            circle(r=real_opening_rounding_radius-chamfer);
        }
    }

    translate([0,0,chamfer]) {
        linear_extrude(real_height-2*chamfer)
            section();

        linear_extrude(thickness) {
            difference() {
                translate([-(real_flap_length-cable_diameter/2-thickness-chamfer),0]) {
                    difference() {
                        union() {
                            translate([0,-cable_diameter/2-thickness+chamfer])
                                square([real_flap_length-cable_diameter/2-thickness-chamfer,cable_diameter+2*thickness-2*chamfer]);
                            circle(d=cable_diameter+2*thickness-2*chamfer);
                        }

                        circle(d=screw_diameter+2*chamfer);
                    }
                }

                circle(d=cable_diameter+2*chamfer);
            }
        }
    }
}

module single_clip()
{
    module section()
    {
        rotate(-90-opening_angle/2)
            ring(cable_diameter,thickness,opening_angle,chamfer);

        dist=cable_diameter/2+real_opening_rounding_radius;
        for (mm=[0,1]) {
            mirror([0,mm,0])
                translate([-.001,-.001])
                    rotate(-opening_angle/2)
                        translate([dist,0])
                            circle(r=real_opening_rounding_radius-chamfer);
        }
    }

    translate([0,0,chamfer])
        linear_extrude(real_height-2*chamfer)
            section();
}

module twisted_clip(angle=twist_angle)
{
    real_twisted_clip_cut = twisted_clip_cut=="auto"?(angle>45?false:true):false;

    module section(dia)
    {
        rotate(-90-opening_angle/2)
            ring(dia,thickness,opening_angle,chamfer);

        dist=dia/2+real_opening_rounding_radius;
        for (mm=[0,1]) {
            mirror([0,mm,0])
                translate([-.001,-.001])
                    rotate(-opening_angle/2)
                        translate([dist,0])
                            circle(r=real_opening_rounding_radius-chamfer);
        }
    }

    intersection() {
        union() {
            dist=cable_diameter/2+thickness+rod_diameter/2;

            linear_extrude(real_height)
                section(rod_diameter>cable_diameter?rod_diameter:cable_diameter);
            if (rod_diameter && cable_diameter)
                translate([0,0,real_height/2])
                    rotate([angle,0,0])
                        linear_extrude(real_height,center=true)
                            rotate(180)
                                translate([dist,0])
                                    section(rod_diameter>cable_diameter?cable_diameter:rod_diameter);
        }
        if (real_twisted_clip_cut)
            cylinder(d=4*rod_diameter+4*cable_diameter,h=real_height);
    }
}

module rod_clip()
{
    module section()
    {
        dist=cable_diameter/2+thickness+rod_diameter/2;

        rotate(90-opening_angle) {
            ring(cable_diameter,thickness,opening_angle,chamfer);
            translate([.001,cable_diameter/2+real_opening_rounding_radius-.001])
                circle(r=real_opening_rounding_radius-chamfer);
        }
        if (rod_diameter) {
            translate([-dist,-.001]) {
                rotate(270-opening_angle) {
                    ring(rod_diameter,thickness,opening_angle,chamfer);
                    translate([.001,rod_diameter/2+real_opening_rounding_radius-.001])
                        circle(r=real_opening_rounding_radius-chamfer);
                }
            }
        } else {
            translate([-cable_diameter/2-real_opening_rounding_radius,0])
                circle(r=real_opening_rounding_radius-chamfer);
        }
    }

    translate([0,0,chamfer])
        linear_extrude(real_height-2*chamfer)
            section();
}

module chamfer_chisel()
{
    cylinder(r1=chamfer,r2=0,h=chamfer,$fn=8);
    mirror([0,0,1])
        cylinder(r1=chamfer,r2=0,h=chamfer,$fn=8);
}

module part(part,arg1)
{
    module unchamfered() {
        if (part == "flap")
            flap_clip();
        else if (part == "rod")
            rod_clip();
        else if (part == "cross_flap")
            cross_flap_clip();
        else if (part == "single")
            single_clip();
        else
            twisted_clip(arg1?arg1:twist_angle);
    }

    if (chamfer > 0) {
        minkowski() {
            unchamfered();
            chamfer_chisel();
        }
    } else {
        // Avoid minkowski() for speedup
        unchamfered();
    }
}

module demo()
{
    dist = (max(rod_diameter,cable_diameter)/2+thickness+2.5)*5/6;
    color([90/255,150/255,200/255])
        render()
            translate([dist,dist,0])
                rotate(180)
                    part("twisted",-30);
    color([70/255,130/255,180/255]) // steelblue
        render()
            translate([dist,-dist*4/3,0])
                mirror([1,0,0])
                    part("flap");
    color([255/255,140/255,0/255]) // darkorange
        render()
            translate([-dist,-2*dist,0])
                part("rod");
    color([255/255,160/255,20/255])
        render()
            translate([-dist,dist/3,0])
                part("cross_flap");
}

if (part == "demo") {
    demo();
} else if (part == "hires") {
    $fn=256;
    demo();
} else {
    part(part);
}

```


[User]
Hey, I'm looking to design a 3D-printable tailgate breaker for a Ford Ecosport, specifically the kind with the swinging tailgate. I've seen some designs, and I'd like something parametric that I can customize for fit and desired midpoint angle.

The basic idea is that the breaker will mount onto the tailgate hinge and stop the tailgate at a custom angle, but you should still be able to fully open the tailgate by pushing past the breaker. I think this would be useful for people with tight parking spaces who might not want the tailgate to swing all the way open.

I've got a basic concept, and I think it should be designed as three separate parts that are assembled together. Part 1 & 2 are attached together and both go on the front of the hinge, and part 3 goes on the back of the hinge. These parts should clamp onto the hinge with bolts and nuts, so there should be holes for them in the design. I'm thinking two pairs of bolts should do the trick.

The key parameters I'd need are:

*   **MidAngle:** The angle at which the tailgate movement will get higher friction - this can be set using a slider from 0 to 8 degrees, in 0.5 increments.
*   **BoltRadius:** The radius of the bolt hole, probably something like 1 to 3mm, in 0.1mm increments.
*   **BoltCapRadius:** The radius of the bolt cap (used in part 1), probably around 3 to 5 mm in 0.1mm increments.
*   **NutMaxRadius:** The maximum radius of the nut (for hexagonal perimeter) used in part 3, probably 3 to 6mm, in 0.05mm increments.
*   **Mode:** A way to choose which part to generate, using a drop down list with "Part1", "Part2", and "Part3" options.

I'd like to design this from scratch, so we can go through the process for each part. Can you help me with this? I think it'd make the most sense to have each part in its own file, I'm not sure if I'd want them all combined into one file. Let me know if you have any questions.

[Assistant]
FordEcosportTailgateBreaker.scad:
```
$fn=100+0;

// Choose which part to generate
Mode = "Part1"; // [Part1,Part2,Part3]

// Mid way angle - affect Part 1
MidAngle = 7; // [0:0.5:8]

// Nut & bolt hole radius - affect all parts
BoltRadius = 2; // [1:0.1:3]

// Bolt cap radius - affect Part 1
BoltCapRadius = 3.5; // [3:0.1:5]

// Nut hexagon maximal radius - affect Part 3
NutMaxRadius = 3.95; // [3:0.05:6]

if (Mode == "Part1") {
    part1();
} else {
    if (Mode == "Part2") {
        part2();
    } else {
        part3();
        }
    }

module part2()
{
    difference(){
        translate([-8,-20,0])cube([15+7,40,20]);
        translate([50+(15+6.5-8.2),0,0])rotate(2,[0,0,1])cube(100,center=true);
        translate([0,0,-1])cylinder(h=30,r=5.5);
        translate([-26,-5.5,-1])cube([26,11,30]);
        translate([-50,-12,10])rotate(90,[0,1,0])cylinder(h=100,r=BoltRadius+0.1);
        translate([-50,+12,10])rotate(90,[0,1,0])cylinder(h=100,r=BoltRadius+0.1);
    }
}

module part1(alpha = MidAngle)
{

difference(){

union()
    {
difference(){
cylinder(h=30,r=28.5);
rotate(90,[0,0,1])translate([0,0,-1])cube(500);
rotate(179,[0,0,1])translate([0,0,-1])cube(500);
rotate(220,[0,0,1])translate([0,0,-1])cube(500);
}

difference(){
translate([-1,-20,0])cube([17,40,30]);
translate([0,0,-1])cylinder(h=32,r=5);
translate([-26,-5,-1])cube([26,10,32]);}

translate([13,-20,0])cube([8,40,30]);

rotate(alpha,[0,0,1])translate([24.5,0,0])cylinder(h=30,r=6);

}

  translate([-50,-12,15])rotate(90,[0,1,0])cylinder(h=100,r=BoltRadius+0.1);
  translate([19.8,-12,15])rotate(90,[0,1,0])cylinder(h=100,r=BoltCapRadius+0.5);
  translate([-50,+12,15])rotate(90,[0,1,0])cylinder(h=100,r=BoltRadius+0.1);
  translate([19.8,+12,15])rotate(90,[0,1,0])cylinder(h=100,r=BoltCapRadius+0.5);

  translate([0,-270,0])cube(500,center=true);
  translate([0,+270,0])cube(500,center=true);
  translate([-250+13,0,0])cube(500,center=true);

  move = 2.1;
  rotate(alpha,[0,0,1]){
      for(i = [(20+move): 2 : (26+move)]){
          translate([i,6,15])rotate(4,[0,0,1])cube([1,4,32],center=true);
          translate([i,-6,15])rotate(-4,[0,0,1])cube([1,4,32],center=true);
      }
          translate([19.+move,-5,-1])cube([1.5,10,32]);
      translate([30.8,0,-1])cylinder(h=32,r=1.4);
  }
}
}

module part3()
{
    rotate(-90,[0,1,0])
    difference()
    {
        union()
        {
    translate([-20,-25,0])cube([12,50,20]);
    translate([-20,-25,-5])cube([7,50,30]);
    translate([-19,-10/2,0])cube([12,10,20]);
    translate([-19,-4.9/2+22.55,0])cube([12,4.9,20]);
    translate([-19,-4.9/2-22.55,0])cube([12,4.9,20]);
        }

translate([0,0,-1])cylinder(h=30,r=5);

        translate([-50,-12,10])rotate(90,[0,1,0])cylinder(h=100,r=BoltRadius+0.1);
        translate([-17.5,-12,10])rotate(0,[1,0,0])cube([6,NutMaxRadius+0.05,(NutMaxRadius+0.05)*1.73],center=true);
        translate([-17.5,-12,10])rotate(60,[1,0,0])cube([6,NutMaxRadius+0.05,(NutMaxRadius+0.05)*1.73],center=true);
        translate([-17.5,-12,10])rotate(120,[1,0,0])cube([6,NutMaxRadius+0.05,(NutMaxRadius+0.05)*1.73],center=true);
        translate([-50,+12,10])rotate(90,[0,1,0])cylinder(h=100,r=BoltRadius+0.1);
        translate([-17.5,+12,10])rotate(0,[1,0,0])cube([6,NutMaxRadius+0.05,(NutMaxRadius+0.05)*1.73],center=true);
        translate([-17.5,+12,10])rotate(60,[1,0,0])cube([6,NutMaxRadius+0.05,(NutMaxRadius+0.05)*1.73],center=true);
        translate([-17.5,+12,10])rotate(120,[1,0,0])cube([6,NutMaxRadius+0.05,(NutMaxRadius+0.05)*1.73],center=true);
    }
}

```


[User]
Hi! I'm looking to create a parametric back cover for a Raspberry Pi Zero, and I'd like to use OpenSCAD. I've seen some designs on Thingiverse but I want to be able to customize the cover to my exact needs.

Specifically, I need the design to take into account the dimensions of the Raspberry Pi Zero itself (which I believe are 65mm long and 30mm wide), along with the mounting hole locations, and it needs to allow for some pretty flexible customization.

Here's what I'd like to be able to control via parameters:

*   **Plate Dimensions**:
    *   The thickness of the back cover plate itself.
    *   Independent adjustments for extra length on the left and right sides of the plate. This is important to accommodate things like the camera connector.
    *   Independent adjustments for extra width above and below the Pi Zero.
    *   The corner radius of the plate.

*   **Mounts:**
    *   The additional height of the screw mounts.
    *   The radius of the mounts.
    *   The radius of the screw holes within the mounts.
    *   The depth of the screw holes, with an option to drill through the plate entirely.

*   **Precision:** I'd need to be able to control the precision of curved elements (cylinders) via the `$fn` variable.

I'd like the design to create a base plate with rounded edges, along with the four screw mounts positioned at the standard Raspberry Pi Zero mounting locations, plus one in the center. The screw holes should then be created by subtracting cylinders from the mounts.

It would be great if the code was well-commented and easy to modify later! I'd prefer not to use any external libraries unless absolutely necessary. I'm hoping to achieve the effect of the original design I saw, but also be able to use the customizer on Thingiverse.

Can you generate a single OpenSCAD file with all of this functionality included?

[Assistant]
Raspberry_Pi_Zero_back_cover_by_mabowat_v1m02_customizer.scad:
```
//////////
// This is a simple plate as back cover for Raspberry Pi Zero, dimensions of plate adjustable
// This (also first) version completley written
// on 18.03.2017, Germany
// by: mabowat @ Thingiverse
// License: Creative Commons CC-BY-SA 4.0

//////////
// Version 1 minor 02: Only rearranged comments for better Thingivers customizer usage
// This version comment usage looks uglier than first upload, but should better work in customizer :-/

/* [Hidden] */
//////////
// Dimensions of Pi Zero according to https://www.raspberrypi.org/help/faqs/#generalDimensions
zero_length = 65.0;       // length 65 mm
zero_width  = 30.0;       // width 30 mm; see above
zero_hole_dist = 3.5;     // edge distance of mounting holes of Pi Zero
zero_corner_radius = 3.0; // radius of Pi Zero's rounded edges // not used any more in this customizer version
// End of Pi Zero's Dimensions
//////////

/* [Set parameters of back cover plate] */
//////////
// Set dimensions of back cover plate here
// thinkness of back cover plate
plate_thickness = 1.5;
// additional length added at "left" side; set (e.g) to 1.0 for camera connector overhang
add_length_left = 0.0;
// additional length added at "right" side
add_length_right = 0.0;
// additional width added "above" (additional positive y-dimension)
add_width_above = 0.0;
// additional width added "below" (additional negative y-dimension)
add_width_below = 0.0;
// set to radius to 3 to match radius of rounded edges of Zero's board
corner_radius = 3.0;

/* [Set parameters of mounts and holes] */
//////////
// Set dimensions of mounts here
// additional height of screw mounts
mount_height = 4.0;
// radius of mounts
mount_radius = 3.0;
// radius of screw holes (REDUCE, if too big for your self cutting screws!)
screw_hole_radius = 1.5;
// depth of "drilled" hole, "special options": 1. set to > mount_height to drill into plate 2. to plate_thickness + mount_height to drill through plate :-)
screw_hole_drill_depth = 5.0;
// End off seting dimensions of wanted plate and mounts
//////////

/* [Set precision / number of faces of used cylinder and rounded edges] */
//////////
// Setting precicion of cylinders; set number of faces per full cylinder;
$fn = 32;

//////////
// Calculating outer cover plate dimesions
length = zero_length + add_length_left + add_length_right;
width  = zero_width  + add_width_below + add_width_above;

//////////
// Calculating absolute positions of 4 outer mounts
// and Dimensions of mounts
mount_xa = zero_length/2 - zero_hole_dist; // Absolute x-value of mount position
mount_ya = zero_width/2 - zero_hole_dist; //          y-value
mount_h = plate_thickness + mount_height;
screw_hole_base_height = mount_h - screw_hole_drill_depth;

//////////
// Calculating dimensions of inner cube, minkowski adds 2*corner_radius
cube_length = length - 2*corner_radius;
cube_width  = width  - 2*corner_radius;

//////////
// Differnce of baseplate and mounts with screwholes
// This is the outer assembly of all parts
difference() {

//////////
// Union of baseplate and mounts
// This is the assembly of all "non negative" parts
// (Difference with screw holes is done outside, to allow holes "drill" through mounts into plate)
union() {

//////////
// baseplate with rounded edges
translate([-zero_length/2+corner_radius-add_length_left,-zero_width/2+corner_radius-add_width_below,0])
minkowski()
//union()
{   // height of minkowski summed objects is added also, thus both set to half height
    cube([cube_length,cube_width,plate_thickness/2]);
    cylinder(r=corner_radius,h=plate_thickness/2);
};

//////////
// Mounts

//////////
// Set mounts
translate([        0,         0, 0]) cylinder(r=mount_radius,h=mount_h);  // Center mount
translate([-mount_xa, -mount_ya, 0]) cylinder(r=mount_radius,h=mount_h);  // 4 mounts on Zero's edges
translate([-mount_xa, +mount_ya, 0]) cylinder(r=mount_radius,h=mount_h);
translate([+mount_xa, -mount_ya, 0]) cylinder(r=mount_radius,h=mount_h);
translate([+mount_xa, +mount_ya, 0]) cylinder(r=mount_radius,h=mount_h);

}
// End of -> Union of baseplate and mounts
//////////

//////////
// Generate drill holes

translate([0,0,screw_hole_base_height]) {
    // Zylinders for screw holes on Zero's edges
    translate([-mount_xa,-mount_ya,0]) cylinder(r=screw_hole_radius,h=screw_hole_drill_depth);
    translate([-mount_xa,+mount_ya,0]) cylinder(r=screw_hole_radius,h=screw_hole_drill_depth);
    translate([+mount_xa,-mount_ya,0]) cylinder(r=screw_hole_radius,h=screw_hole_drill_depth);
    translate([+mount_xa,+mount_ya,0]) cylinder(r=screw_hole_radius,h=screw_hole_drill_depth);
};

};
// End of -> Union of baseplate and mounts
//////////

```
Raspberry_Pi_Zero_back_cover_by_mabowat_v1m02.scad:
```
//////////
// This is a simple plate as back cover for Raspberry Pi Zero, dimensions of plate adjustable
// This (also first) version completley written
// on 18.03.2017, Germany
// by: mabowat @ Thingiverse
// License: Creative Commons CC-BY-SA 4.0

//////////
// Version 1 minor 02: Silent (same day) update of this file, only correction of small comment errors
// Other version in download is optimised for customiser.
// That version's comment usage looks uglier than first upload, but should better work in customizer :-/

//////////
// Dimensions of Pi Zero
// according to https://www.raspberrypi.org/help/faqs/#generalDimensions
zero_length = 65.0;       // length 65 mm
zero_width  = 30.0;       // width 30 mm; see above
zero_hole_dist = 3.5;     // edge distance of mounting holes of Pi Zero
zero_corner_radius = 3.0; // radius of Pi Zero's rounded edges
// End of Pi Zero's Dimensions
//////////

//////////
// Set dimensions of cover plate here
plate_thickness = 1.5;          // thinkness of cover plate
add_length_left = 0.0;          // additional length added at "left" side
                                // set (e.g) to 1.0 for camera connector overhang
add_length_right = 0.0;         // additional length added at "right" side
add_width_above = 0.0;          // additional width added "above" (= additional positive y-dimension)
add_width_below = 0.0;          // additional width added "below" (= additional negative y-dimension)
corner_radius = zero_corner_radius;      // set to radius of Zero's rounded edges,
                                         // but you just set different corner radius easily;

//////////
// Set dimensions of mounts here
mount_height = 4.0;             // additional height of screw mounts
mount_radius = 3.0;             // radius of mounts
screw_hole_radius = 1.5;        // radius of screw holes (REDUCE, if too big for your self cutting screws!)
screw_hole_drill_depth = 5.0;   // depth of "drilled" hole
                                // "special options":      ;-)
                                // to deliberately "drill" into the plate set depth > mount_height
                                // to even "drill" through the plate
                                // set depth > mount_height + plate_thickness
// End off seting dimensions of wanted plate and mounts
//////////

//////////
// Calculating outer cover plate dimesions
length = zero_length + add_length_left + add_length_right;
width  = zero_width  + add_width_below + add_width_above;

//////////
// Calculating absolute positions of 4 outer mounts
// and Dimensions of mounts
mount_xa = zero_length/2 - zero_hole_dist; // Absolute x-value of mount position
mount_ya = zero_width/2 - zero_hole_dist; //          y-value
mount_h = plate_thickness + mount_height;
screw_hole_base_height = mount_h - screw_hole_drill_depth;

//////////
// Calculating dimensions of inner cube, minkowski adds 2*corner_radius
cube_length = length - 2*corner_radius;
cube_width  = width  - 2*corner_radius;

//////////
// Setting precicion of cylinders;
$fn = 32; // number of faces per full cylinder;

//////////
// Differnce of baseplate and mounts with screwholes
// This is the outer assembly of all parts
difference() {

//////////
// Union of baseplate and mounts
// This is the assembly of all "non negative" parts
// (Difference with screw holes is done outside, to allow holes "drill" through mounts into plate)
union() {

//////////
// baseplate with rounded edges
translate([-zero_length/2+corner_radius-add_length_left,-zero_width/2+corner_radius-add_width_below,0])
minkowski()
//union()
{   // height of minkowski summed objects is added also, thus both set to half height
    cube([cube_length,cube_width,plate_thickness/2]);
    cylinder(r=corner_radius,h=plate_thickness/2);
};

//////////
// Mounts

//////////
// Set mounts
translate([        0,         0, 0]) cylinder(r=mount_radius,h=mount_h);  // Center mount
translate([-mount_xa, -mount_ya, 0]) cylinder(r=mount_radius,h=mount_h);  // 4 mounts on Zero's edges
translate([-mount_xa, +mount_ya, 0]) cylinder(r=mount_radius,h=mount_h);
translate([+mount_xa, -mount_ya, 0]) cylinder(r=mount_radius,h=mount_h);
translate([+mount_xa, +mount_ya, 0]) cylinder(r=mount_radius,h=mount_h);

}
// End of -> Union of baseplate and mounts
//////////

//////////
// Generate drill holes

translate([0,0,screw_hole_base_height]) {
    // Zylinders for screw holes on Zero's edges
    translate([-mount_xa,-mount_ya,0]) cylinder(r=screw_hole_radius,h=screw_hole_drill_depth);
    translate([-mount_xa,+mount_ya,0]) cylinder(r=screw_hole_radius,h=screw_hole_drill_depth);
    translate([+mount_xa,-mount_ya,0]) cylinder(r=screw_hole_radius,h=screw_hole_drill_depth);
    translate([+mount_xa,+mount_ya,0]) cylinder(r=screw_hole_radius,h=screw_hole_drill_depth);
};

};
// End of -> Union of baseplate and mounts
//////////

```


[User]
Hey, I'm looking to generate an OpenSCAD design for a box, and I'd like it to be parametric so I can adjust the dimensions. I've got a general idea, but I need some help getting it into code.

Basically, the box should be a rectangular prism with rounded ends. These ends are generated using cylinders, blended into the rectangular body using the `hull()` operation. Think of a stretched-out capsule shape, but with flat top and bottom surfaces.

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

*   `cylinder_radius`: The radius of the cylindrical ends.
*   `box_length`: The length of the rectangular section (distance between the centers of the cylinders).
*   `box_height`: The total height of the box (excluding any bevels),
*   `wall`: The thickness of the box walls.
*   `inset`: The size of a frame or lip around the top opening of the box.
*   `bevel_height`: The height of the bevel where the lid fits into the box.
*  `bevel_radius`: The inset radius for the bevel, also the distance from the top of the bevel to the top surface of the box
*   `shelf_height`: The height of a shelf inside the box, which sits below the lid.
*  `shelf_radius`: The inset radius for the shelf.
* `margin`: The clearance between the lid and the box, which should be used to offset the lid to make the lid have a friction fit
*  `fudge`: A small amount added to the wall thickness and the inset to make sure things are properly sized.

The design should include both the main box body and a lid that fits snugly into the box. The lid should sit flush with the top of the box when closed, and a shelf feature should be provided to provide a place for the lid to rest. The lid should also include a small bevel along its perimeter, so it mates well with the bevel on the box. A small offset or `margin` should be used on the lid to achieve a friction fit.  I'd like it such that the lid is constructed by intersecting the outer shape of the box with an appropriately offset part.

I would like for this design to be generated using the standard OpenSCAD library. No external libraries are needed. I'm also printing with a 0.4mm nozzle. Can you generate a set of .scad files for this?

[Assistant]
BevelBox.scad:
```
// BevelBox by Erik Wrenholt 2017-03-18
// License: Creative Commons - Attribution

$fn = 96;

// set to true to debug cross section
debug = false;

// Radius of cylinder ends
cylinder_radius = 12; // [6:40]

// Length of the box from middle of cylinder to cylinder
box_length = 28; // [0:100]

// Height of the box (excluding the bevels)
box_height = 6; // [2:40]

// Margin between lid and box
margin = 0.1;

// Thickness of the wall
wall = 1.6; // [0.8:2.0]

// Size of the frame around lid
inset = 1.2; // [0.8:1.6]

// This also specifies the lid height
bevel_height = 1.6;

// This is the bevel inset radius. Must be positive to hold a lid
bevel_radius = 1.6;

// Shelf must be greater than inset
shelf_height = 1.2;

// Shelf radius must be greater than inset
shelf_radius = 1.2;

// Increase to get a complete ring
fudge = 0.01; // [0:0.2]

wall_thickness = wall + fudge;
lid_inset = inset + fudge;

difference() {
    union() {
        box();
        translate([cylinder_radius*2, 0, -(bevel_height+box_height-0.001)])
            lid(margin);
    }
    if (debug) {
        translate([-30,0,-10])
            cube([80,40,40]);
    }
}

module box() {
    difference() {
        box_exterior();
        box_interior();
        lid_part(0, 20);
    }
}

module lid(margin = 0) {

    union() {

        intersection() {
            box_exterior();
            lid_part(margin, 20);
        }

        // lines on the lid to make it easier to slide
        for (i = [-1:1])
            translate([0, -box_length/2 + i*2, bevel_height*2+box_height-0.001])
                cube([cylinder_radius*2 - bevel_radius*2 - lid_inset*6, 0.8, 0.8], center=true);
    }
}

module lid_part(margin = 0, extra_length=0) {
    translate([0, -extra_length / 2, bevel_height+box_height-0.001])
        lozenge(
            cylinder_radius-lid_inset-margin,
            cylinder_radius-bevel_radius-lid_inset-margin,
            bevel_height+0.002,
            box_length+extra_length);

}

module box_exterior() {

    lozenge(cylinder_radius-bevel_radius, cylinder_radius, bevel_height, box_length);
    translate([0,0,bevel_height])
        lozenge(cylinder_radius, cylinder_radius, box_height, box_length);
    translate([0,0,bevel_height+box_height])
        lozenge(cylinder_radius, cylinder_radius-bevel_radius, bevel_height, box_length);

}

module box_interior() {
    // inner box
    translate([0,0,bevel_height-0.001])
        lozenge(
            cylinder_radius-wall_thickness,
            cylinder_radius-wall_thickness,
            box_height-shelf_height+0.002,
            box_length);
    translate([0,0,box_height-shelf_height+bevel_height])
        lozenge(
            cylinder_radius-wall_thickness,
            cylinder_radius-wall_thickness-shelf_radius,
            shelf_height+0.001,
            box_length);
}

module lozenge(r1, r2, height, length) {
    hull() {
        translate([0, -length / 2, 0])
            cylinder(r1 = r1, r2 = r2, h = height);
        translate([0, length / 2, 0])
            cylinder(r1 = r1, r2 = r2, h = height);
    }
}

```


[User]
Hey there, I'm looking to design a customizable compartmentalized container, mainly for storing essential oils. I'd like to be able to adjust the size of the individual compartments, the number of compartments along both the length and width, and the overall height of the container. The container should have a base with interior walls to create the compartments, and a sliding cover with a thumb grip.

Here are some specific design parameters that need to be adjustable:

*   **Compartment Dimensions:**
    *   `compartment_height`: Height of each individual compartment.
    *   `compartment_length`: Length of each individual compartment.
    *   `compartment_width`: Width of each individual compartment.
*   **Compartment Layout:**
    *   `compartment_count_length`: Number of compartments along the length of the container.
    *   `compartment_count_width`: Number of compartments along the width of the container.
*   **Wall Thickness:**
    *   `wall_thickness`: Thickness of the walls between compartments.
    *    `outter_wall_thickness`: Thickness of the outer walls of the container.
*   **Interior Wall Height:**
    *   `interior_wall_height`: The height of the walls separating the compartments, which should be less than or equal to `compartment_height`. I'd like this to be a percentage of the compartment height.
*   **Cover:**
    *   The cover should slide into a track on top of the base.
    *   The cover should have a thumb grip.
* **Clearances**
    *   There needs to be a small buffer between the cover and the track to allow it to slide smoothly.

I'm thinking the design will need to be broken into modules for the base, the individual compartment cutouts, and the sliding cover and its track.

Could you provide the OpenSCAD code for this, broken into multiple .scad files as needed? I'm hoping you can use a library to help with this. Let me know if you think there is an appropriate library.

[Assistant]
compart_container.scad:
```
/******************************
  Made with coffee by HarlemSquirrel
  March 2017
******************************/

compartment_height = 69;
compartment_length = 30;
compartment_width = 30;

compartment_count_length = 8;
compartment_count_width = 8;

interior_wall_height = compartment_height * 0.7;

wall_thickness = 1;
outter_wall_thickness = 3;

box_width = compartment_width * compartment_count_width + (wall_thickness * (compartment_count_width - 1)) + outter_wall_thickness*2;
box_length = compartment_length * compartment_count_length + (wall_thickness * (compartment_count_length - 1)) + outter_wall_thickness*2;
box_height = compartment_height;

cover_dimensions = [box_width - outter_wall_thickness, box_length - outter_wall_thickness, 2];
buffer = 1;

module compartment_cuttout() {
  cube([compartment_width, compartment_length, compartment_height]);
}

module compartment_cuttouts() {
  for (ix = [0:compartment_count_width-1]) {
    x_offset = outter_wall_thickness + wall_thickness * ix + compartment_width * ix;
    for (iy = [0:compartment_count_length-1]) {
      y_offset = outter_wall_thickness + wall_thickness * iy + compartment_length * iy;
      translate([x_offset, y_offset, wall_thickness]) compartment_cuttout();
    }
  }
}

module box_base() {
  difference() {
    cube([box_width, box_length, box_height]);
    translate([outter_wall_thickness, outter_wall_thickness, outter_wall_thickness + interior_wall_height])
      cube([box_width - (outter_wall_thickness * 2), box_length - (outter_wall_thickness * 2), box_height]);
  }
}

module box_bottom() {
  difference() {
    box_base();
    compartment_cuttouts();
  }
}

module cover_sliding() {
  union() {
    // thumb grip
  thumb_grip_width = cover_dimensions[0]/3 ;
  translate([cover_dimensions[0]/2 - thumb_grip_width/2, cover_dimensions[1] - outter_wall_thickness, cover_dimensions[2]])
    cube([thumb_grip_width, wall_thickness*2, wall_thickness*2]);

  cube(cover_dimensions);
  }

}

module cover_sliding_track() {
  track_dimensions = [box_width, box_length-outter_wall_thickness, cover_dimensions[2]*2];
  track_cuttout_dimensions = [track_dimensions[0] - outter_wall_thickness*2, track_dimensions[1], track_dimensions[2]*4];

  cover_cuttout_dimensions = [cover_dimensions[0]+buffer, cover_dimensions[1]+buffer*2, cover_dimensions[2]+wall_thickness*2+buffer];
  difference() {
    cube(track_dimensions);
    translate([outter_wall_thickness,outter_wall_thickness,-1])
      cube(track_cuttout_dimensions);
    translate([buffer, wall_thickness/2, -0.01])
      resize(cover_cuttout_dimensions)
      cover_sliding();
  }
}

module box_bottom_with_track() {
  box_bottom();
  translate([0,0,box_height])
    cover_sliding_track();
}

box_bottom_with_track();
translate([0,0, compartment_height + 20])
cover_sliding();
```


[User]
Hey, I'm trying to design a magnetic stirrer using a PC fan and some magnets, but I'm having trouble getting the mount to fit consistently. I need a parametric design that I can adjust to different fan sizes. I think I've got the main idea down, but I'm not great at OpenSCAD. I've attached the existing code, which is a good starting point.

Essentially, I need a mount that has the following:

*   A central part that attaches to the PC fan hub, with adjustable diameter, height and wall thickness. It needs slots cut out to avoid hitting the fan blades. The number of blades, and the width of each slot needs to be adjustable too. I used a 'fiddle factor' to make the slots work okay when there were different number of blades in the code I sent you, so please can you implement that.
*   Two cylindrical recesses to hold the magnets, located on opposite sides and offset a bit from the center. The diameter, height, and wall thickness of these recesses needs to be adjustable. They need to have a small clearance so the magnets will fit nicely.
*   A washer-like section connecting the magnet mounts to the fan mount. The diameter and height of this needs to be adjustable.

I'd like to be able to adjust all of the following parameters:

*   `Magnet_Diameter`: Diameter of the magnet (with clearance)
*   `Magnet_Height`: Height of the magnet (with clearance)
*   `Magnet_Wall`: Wall thickness of the magnet retainer
*   `Washer_Diameter`: Diameter of the washer section
*   `Washer_Height`: Height of the washer section
*   `Fan_Diameter`: Inner diameter of the part that engages with fan
*   `Fan_Height`: Height of the part that engages with fan
*   `Fan_Wall`: Wall thickness of the part that engages with fan
*   `Fan_Blades`: Number of fan blades
*   `Fan_Slot`: Width of the slot for each blade
*   `Fan_Fiddle_Factor`: Factor to avoid short segments when changing the number of blades. I used 0.75 before and that seemed good for a variety of fan designs.

I don't need to print supports, so please can you avoid adding any.

I'd like the design to be in a single .scad file if possible, and I don't need to use any external libraries at this time.

[Assistant]
FanMagHolder.scad:
```
// Mount to put spinning magnets onto a PC fan for magnetic stirrer

/* [Magnets] */

// Allow clearance
Magnet_Diameter = 15.5;
// Allow clearance
Magnet_Height = 2;

// Wall thickness of magnet retainer
Magnet_Wall = 0.81;
//This is two walls with line width of 0.4mm and extra 0.01 is to prevent rounding errors.

/* [Washer] */

Washer_Diameter = 32; //  Generous is OK.
Washer_Height = 1.6;

/* [Fan] */

// Inner diameter of part that engages with fan
Fan_Diameter = 38;
// Height of part that engages with fan
Fan_Height = 8.5;
// Wall thickness of part that engages with fan
Fan_Wall = 1.21;
// Number of fan blades
Fan_Blades = 7;
// Width of slot for each blade.
Fan_Slot = 8;
// Tune to avoid short segments when changing number of blades!
Fan_Fiddle_Factor = 0.75; 	// The 0.75 is a fiddle factor to avoid short segments. If you change number of blades, you may need to fiddle with this.

/* [Hidden] */

$fn = 60;
Tad = 0.1;
Tad2 = Tad*2;

difference () {
	union () {
		// Main body
		cylinder (d=Fan_Diameter+Fan_Wall*2, h=Fan_Height);
		// Mag bodies
		for (x=[-1,1]) translate ([Washer_Diameter/2*x, 0, 0]) cylinder (d=Magnet_Diameter+Magnet_Wall*2, h=Magnet_Height);
	}
	// Remove cylinder for fan
	translate ([0, 0, Magnet_Height+Washer_Height]) cylinder (d=Fan_Diameter, h=Fan_Height);
	// Remove cylinder for washer
	translate ([0, 0, Magnet_Height]) cylinder (d=Washer_Diameter, h=Washer_Height+Tad);
	// Remove mag holes
	for (x=[-1,1]) translate ([Washer_Diameter/2*x, 0, -Tad]) cylinder (d=Magnet_Diameter, h=Fan_Height*2); // Fan_Height*2 just means "go mad, go high".
	// Blade cutouts.

	for (b = [1 : Fan_Blades]) rotate ([0, 0, (b + Fan_Fiddle_Factor) * (360 / Fan_Blades)]) translate ([- Fan_Slot/2, 0, Magnet_Height + Washer_Height]) cube ([Fan_Slot, Fan_Diameter*2, Fan_Height*2]);
}

```


[User]
Hey, I need help designing a parametric HDD holder in OpenSCAD. I'm using 2.5" HDDs in USB enclosures, and I want to hold them vertically, but I also want to be able to adjust the design so they can be held horizontally. I need the holder to be customizable in a few ways: number of disks, dimensions of the HDD enclosures, the spacing between the disks, the overall thickness of the holder, the wall thickness, and how high the bottom of the disk sits above the base. I'd like to be able to set the width and height of the disk enclosures, the wall thickness, the thickness of the holder, the elevation above the base, and the number of disks, and spacing between them.

Essentially, I'm thinking of something like a shelf with slots for the hard drives. Each slot should have a defined wall thickness, and the height of the bottom of the slot above the base needs to be customizable. I'd like the base to extend out on either side of the slot dividers, providing a stable base. The slots should be stacked vertically with a customizable spacing between the slots. The sides of the slots themselves should also be adjustable and not just created as an offset, in case the user wants to design this to hold something that isn't a 2.5" hard drive. I need the base of the shelf to support the weight of the HDDs.

I'd like you to make this a single .scad file, and I'm not using any libraries for this project, so no MCAD, BOSL, BOSL2, dotSCAD, NopSCADlib, or BOLTS. I hope that gives you enough information to get started!

[Assistant]
hdd_holder.scad:
```

// quality
$fn = 50;

// width of HDD case
hddWidth = 78;

// height of HDD case
hddHeight = 17;

// Thickness (height) of holder
thickness = 5;

// Wall thickness
wall = 4;

// Num of HDDs
count = 2;

// Spacing between HDDs
spacing = 10;

// Width of holder's base for one HDD
baseWidth = 30;

// Elevation of bottom of HDD
elevation = 10;

module holdersTopBase() {
  for (i = [0:count-1]) {
    translate([0, i * (spacing + hddHeight + 2*wall), 0])
    linear_extrude (height=thickness)
    difference() {
      offset (r=wall) square ([hddWidth, hddHeight], center=true);
      square ([hddWidth, hddHeight], center=true);
    }
  }
}

module holdersTop() {
  translate([0, -((count - 1) * (spacing + hddHeight + 2*wall))/2, -thickness/2])
  holdersTopBase();
}

module base() {
  hull() {
    translate([-hddWidth/2-1, 0, 0])
    cube ([1, (count - 1) * spacing + (count * (hddHeight + 2*wall)) - 1, thickness], center=true);

    translate([-hddWidth/2-wall-elevation, 0, 0])
    cube([1, count*(baseWidth + spacing), thickness], center=true);
  }

  if (count > 1) {
    translate([hddWidth/2+wall/2, 0, 0])
    cube ([wall, (count - 1) * (spacing + hddHeight + 2*wall), thickness], center=true);
  }
}

union() {
  holdersTop();
  base();
}

```


[User]
Hey there! I'm looking to create a parametric model of a bacteriophage in OpenSCAD, sort of like the one here: [thingiverse link from description]. I've seen a few designs out there, like this one [another thingiverse link from description], but I want something a bit more customizable. Basically, I'd like to be able to control the number of legs, the thickness of the legs, and maybe even the overall size of the phage.

I’d like to make it a bit more detailed than the basic one I made before, but still printable without supports. I'd want to have an icosahedral head, a base plate, and a helical sheath. For the head, I think it would be cool if we could make it rounded, sort of like a minkowski sum with a sphere, as in this other design of mine. [link to the second bacteriophage scad file in the prompt]

So, to summarize, I need:
*   A bacteriophage model.
*   Parametric control over the number of legs and leg width.
*   An icosahedral head, with an option to be rounded.
*   A base plate.
*   A helical sheath, like the original I designed.
*   Legs built using a hull, and that are flat on the bottom for easy printing.
*  All the code in a single file if possible, or multiple files, but preferably no library dependencies beyond what is part of base OpenSCAD itself.
*  Also, if you are generating an icosahedron module, make sure it's parametric like this one: [link to Icosahedron code from first file].

I know that's a lot, but I'm really excited to see what you come up with! Thanks!

[Assistant]
Bacteriophage.scad:
```
// Bacteriophage by Erik Wrenholt 2017-02-12
// License: Creative Commons - Attribution

$fn = 12;

leg_count = 6;
leg_width = 1.75;

printable_phage();

module printable_phage() {
    // chop off the bottom of the legs so they are flat on the bottom.
    difference() {
        bacteriophage();
        translate([0,0,-5]) cube([100,100,10], center=true);
    }
}

module bacteriophage() {
    body();
    for(i=[0:leg_count]) {
        rotate((360 / leg_count) * i, [0,0,1])
            leg();
    }
 }

module body() {

    // Icosahedral head
    translate([0,0,30])
    scale([1,1,1.3])
        rotate(30, [0,1,0])
                icosahedron(5);

    // Base-Plate
    translate([0,0,1.5])
        scale([1,1,0.4])
            rotate(30, [0,0,1])
                sphere(6, $fn=12);

    // Helical Sheath
    for(i=[2:10]) {
        translate([0,0,i*2])
            scale([1,1,0.5])
                sphere(4);
    }

}

module leg() {
    union() {
        hull() {
            translate([2,0,0]) sphere(leg_width);
            translate([15,0,12]) sphere(leg_width);
        }
        hull() {
            translate([15,0,12]) sphere(leg_width);
            translate([25,0,-2]) sphere(leg_width);
        }
    }
}

// https://www.thingiverse.com/thing:1343285

/*****************************************************************
* Icosahedron   By Adam Anderson
*
* This module allows for the creation of an icosahedron scaled up
* by a factor determined by the module parameter.
* The coordinates for the vertices were taken from
* http://www.sacred-geometry.es/?q=en/content/phi-sacred-solids
*************************************************************/

module icosahedron(a = 2) {
    phi = a * ((1 + sqrt(5)) / 2);
    polyhedron(
        points = [
            [0,-phi, a], [0, phi, a], [0, phi, -a], [0, -phi, -a], [a, 0, phi], [-a, 0, phi], [-a, 0, -phi],
            [a, 0, -phi], [phi, a, 0], [-phi, a, 0], [-phi, -a, 0], [phi, -a, 0]
        ],
        faces = [
            [0,5,4], [0,4,11], [11,4,8], [11,8,7], [4,5,1], [4,1,8], [8,1,2], [8,2,7], [1,5,9], [1,9,2], [2,9,6], [2,6,7], [9,5,10], [9,10,6], [6,10,3], [6,3,7], [10,5,0], [10,0,3], [3,0,11], [3,11,7]
        ]

    );
}
```
Bacteriophage-Rounded.scad:
```
// Bacteriophage by Erik Wrenholt 2017-02-12
// License: Creative Commons - Attribution

$fn = 24;

leg_count = 6;
leg_width = 1.55;

printable_phage();

module printable_phage() {
    // chop off the bottom of the legs so they are flat on the bottom.
    difference() {
        bacteriophage();
        translate([0,0,-5]) cube([100,100,10], center=true);
    }
}

module bacteriophage() {
    body();
    for(i=[0:leg_count]) {
        rotate((360 / leg_count) * i, [0,0,1])
            leg();
    }
 }

module body() {

    // Icosahedral head
    minkowski() {
        sphere(r=1.5, $fn = 24);
        translate([0,0,30])
        scale([1,1,1.3])
            rotate(30, [0,1,0])
                icosahedron(4.0);
    }

    // Base-Plate
    translate([0,0,1.2])
        scale([0.93,0.93,0.4])
            rotate(30, [0,0,1])
                sphere(6, $fn=12);

    union() {
        cylinder(r = 2.2, h=24);
        for(i=[0:240]) {
            translate([0,0,i/10])
                rotate(i*54.8, [0,0,1])
                    translate([2.2, 0, 0])
                        sphere(r = 1, $fn = 24);
        }
    }

}

module leg() {
    union() {
        hull() {
            translate([2,0,0]) sphere(leg_width);
            translate([15,0,12]) sphere(leg_width);
        }
        hull() {
            translate([15,0,12]) sphere(leg_width);
            translate([25,0,-2]) sphere(leg_width);
        }
    }
}

// https://www.thingiverse.com/thing:1343285

/*****************************************************************
* Icosahedron   By Adam Anderson
*
* This module allows for the creation of an icosahedron scaled up
* by a factor determined by the module parameter.
* The coordinates for the vertices were taken from
* http://www.sacred-geometry.es/?q=en/content/phi-sacred-solids
*************************************************************/

module icosahedron(a = 2) {
    phi = a * ((1 + sqrt(5)) / 2);
    polyhedron(
        points = [
            [0,-phi, a], [0, phi, a], [0, phi, -a], [0, -phi, -a], [a, 0, phi], [-a, 0, phi], [-a, 0, -phi],
            [a, 0, -phi], [phi, a, 0], [-phi, a, 0], [-phi, -a, 0], [phi, -a, 0]
        ],
        faces = [
            [0,5,4], [0,4,11], [11,4,8], [11,8,7], [4,5,1], [4,1,8], [8,1,2], [8,2,7], [1,5,9], [1,9,2], [2,9,6], [2,6,7], [9,5,10], [9,10,6], [6,10,3], [6,3,7], [10,5,0], [10,0,3], [3,0,11], [3,11,7]
        ]

    );
}
```


[User]
Hey, I'm looking to create a customizable text-based box using OpenSCAD. I'd like it to be parametric so I can easily change things like the text, font, size, and dimensions.

Essentially, I want to be able to generate either just the box container, just the lid, or both together. The box should be formed by extruding the text, with rounded edges. I'd also like a lid that fits snugly on top, with some space between the text of the lid and the text of the box (for tolerance).

Here's a breakdown of the features and parameters:

*   **Model Type:**  A parameter that lets me choose whether to generate "Both" the box and lid, just the "Lid", or just the "Container".
*   **Text:**  The text I want to use to form the box and lid shapes.
*   **Font Size:** The size of the text.
*  **Font Name:** The name of the font to use (ideally, something from Google Fonts, like Arial Black). I need to make sure this font works well with OpenSCAD.
*   **Rounded Edge Radius:**  A value that controls the roundness of the edges of the extruded text. This should be implemented with a minkowski operation.
*   **Container Height:** The height of the box container.
*   **Lid Height:** The height of the lid.
*   **Thickness:** The thickness of the walls/floor of the container, and of the lid.
*   **Spacing:** The spacing between the text of the box and the text of the lid.

The lid should have a small lip that extends down into the box for a secure fit, which also uses the thickness and spacing parameters. The text on the top of the lid should be extruded a very small amount.

I'm not looking to use any specific libraries, just standard OpenSCAD features.

Could you generate the OpenSCAD code for this? Thanks!

[Assistant]
text_box.scad:
```
model_type = "Both"; // [Both, Lid, Container]
t = "XD";
font_size = 30;
font_name = "Arial Black";
r_round_edge = 7;
container_height = 30;
lid_height = 10;
thickness = 1;
spacing = 0.6;

module minkowski_text(t, size, font, r_round_edge) {
    $fn = 24;
    minkowski() {
        text(t, font = font, size = size);
        circle(r_round_edge);
    }
}

module text_container(t, font_size, font_name, r_round_edge, container_height, thickness) {
    difference() {
        linear_extrude(container_height)
            minkowski_text(t, font_size, font_name, r_round_edge);
        translate([0, 0, thickness])
            linear_extrude(container_height - thickness)
                offset(r = -thickness)
                    minkowski_text(t, font_size, font_name, r_round_edge);
    }
}

module text_lid(t, font_size, font_name, r_round_edge, container_height, lid_height, thickness, spacing) {
    translate([0, 0, lid_height - thickness])
        linear_extrude(thickness)
            offset(r = spacing + thickness)
                minkowski_text(t, font_size, font_name, r_round_edge);

    linear_extrude(lid_height) difference() {
        offset(r = spacing + thickness)
            minkowski_text(t, font_size, font_name, r_round_edge);
        offset(r = spacing)
            minkowski_text(t, font_size, font_name, r_round_edge);
    }
}

module text_box(model_type, t, font_size, font_name, r_round_edge, container_height, lid_height, thickness, spacing) {

    if(model_type == "Both" || model_type == "Container") {
        text_container(t, font_size, font_name, r_round_edge, container_height, thickness);
    }

    if(model_type == "Both" || model_type == "Lid") {
        offset_y = (font_size + r_round_edge) * 2;

        translate([0, offset_y, 0])
            text_lid(t, font_size, font_name, r_round_edge, container_height, lid_height, thickness, spacing);

        translate([0, offset_y, lid_height])
            linear_extrude(thickness)
                text(t, size = font_size, font = font_name);
    }
}

text_box(model_type, t, font_size, font_name, r_round_edge, container_height, lid_height, thickness, spacing );
```


[User]
Hey, I'm looking to create a parametric OpenSCAD model that can turn any STL file into a 1x2x3 Rubik's Cube style puzzle. I've seen a couple of examples of this and would like to build my own. Basically, I want to import an STL file, then have OpenSCAD cut it into three segments – a top, a middle, and a bottom, with the middle section having a rotating pin for the puzzle mechanism.

I need to be able to adjust a few things:

1.  **The STL file itself:** Obviously, I need to specify the file to import.
2.  **Resizing:** I need to be able to resize the imported STL model, because not all models will be the right size initially. I should be able to specify the target size using the standard OpenSCAD resize function, I think.
3. **Shifting:** I should also be able to shift the model around by a specified amount using the translate() command. This would be useful if the original STL model is not centered correctly
4.  **Middle width:** This is the thickness of the middle segment with the pin – basically, how wide the main turning section of the puzzle will be.
5.  **Shaft diameter:** The diameter of the shafts that connect the top and bottom sections to the middle part. These need to be adjustable.
6.  **Shaft length:** The length of those connecting shafts - also adjustable.
7.  **Pin diameter:** The diameter of the rotating pin.
8.  **Pin length:** The length of the pin, which will connect to the top and bottom portions.
9.  **Preview mode:** I need a way to see the cutting planes before I render the final model - I should be able to generate a preview showing the outline of the cut sections.
10. **Render mode:** This would render the final puzzle - cutting the original model and adding the shafts and pin.
11. **Pin rendering**: Finally, I need to be able to render just the pin for testing purposes
12. **Clearances:** There should be adjustable clearances for the shafts and pin to allow for easier movement after printing. I should be able to specify the general clearance, and also a specific clearance for the shafts.

I think that’s about it. Let me know if you need more clarification on what I'm looking for. I'm not using any custom libraries currently, just vanilla OpenSCAD features.

[Assistant]
Rubiks321_-_UltimakerRobot.scad:
```

use<Rubiks321.scad>

rubiks321(
	filename = "UltimakerRobot.stl", //name of original STL file
	VIEW = 0, //0 = Preview, 1 = Final for print, 2 = pin
	new_size = [0,0,80], //resize the imported STL, using standard OpenSCAD resize ()
	shift = [0,0,3], // move the STL, if it has imported off-center, or you want the cutting planes off-center
	mid_width = 40, //size of middle section, the part with the pin in
	shaft_dia = 15, //diameters of the shaft connecting the top and bottom section to the middle. Make sure this is quite large, but not extending outside the body.
	shaft_length = 6, //length of the shaft, make this fairly long, but make sure this doesn't touch the pin
	pin_dia = 10, // diameter of the pin, 10mm works well, only change if you have a very large or small model
	pin_length = 30 // length of pin, 30mm works well, only change if you have a very large or small model
);

```
Rubiks321.scad:
```

module rubiks321(
	filename,
	mid_width,
	shaft_dia,
	shaft_length,
	pin_dia,
	pin_length,
	VIEW = 0,
	new_size = [0,0,0],
	new_rotation = [0,0,0],
	bevel=0.8,
	shift=[0,0,0],
	clearance = 0.05,
	shaft_clearance = 0.4
	) {

	$fs=0.5;
	$fa=15;

	shaft_dia = [shaft_dia*2/3, shaft_dia];
	shaft_length = [shaft_length, shaft_length/2];
	pin_dia = [pin_dia*4/5, pin_dia];
	pin_length = [pin_length/6,pin_length];

	if(VIEW==0) preview();
	if(VIEW==1) render() final();
	if(VIEW==2) {pin(true); %rotate([90,0,0]) pin(false);}

	module preview() {
		%original();
		translate([0,0,mid_width/2])
			%cube([200,200,bevel*2],center=true);
		translate([0,0,-mid_width/2])
			%cube([200,200,bevel*2],center=true);
		rotate([0,90,0])
			%cube([200,200,bevel*2],center=true);
		mirX() rotate([0,90,0]) translate([0,0,clearance])
			pin(false);
		shaft_cutout();
	}

	module final() {
		union() {
			difference() {
				original();
				cut(r=[0,0,0], t=[0,0,mid_width/2]);
				cut(r=[0,0,0], t=[0,0,-mid_width/2]);
				cut(r=[0,90,0], t=[0,0,0]);
				mirZ() translate([0,0,mid_width/2]) rotate([0,45,0])
					cube([bevel*sqrt(2), 200, bevel*sqrt(2)], center=true);
				mirX() rotate([0,90,0]) translate([0,0,clearance])
					pin(false);
				shaft_cutout();
			}
			//top and bottom shafts
			mirX() mirZ() translate([-clearance/2,0,mid_width/2-(shaft_length[0]+shaft_length[1])+shaft_clearance]) {
				difference() {
					union() {
						cylinder(d=shaft_dia[0]-shaft_clearance*2,h=shaft_length[0]+shaft_length[1]+bevel*3);
						cylinder(d=shaft_dia[1]-shaft_clearance*2,h=shaft_length[1]-shaft_clearance*2);
					}
					translate([0,-(shaft_dia[1]+1)/2,-0.5])
						cube([shaft_dia[1],shaft_dia[1]+1,shaft_length[0]+shaft_length[1]+bevel*31]);
				}
			}
		}
	}

	module shaft_cutout() {
		mirX() translate([clearance,0,0]) mirZ() {
			translate([0,0,mid_width/2-shaft_length[0]]) {
				cylinder(d=shaft_dia[0],h=shaft_length[0]);
				translate([shaft_dia[0]/2-0.2,0,shaft_length[0]/2])
					rotate(45)
						cube([bevel*1.44,bevel*1.44,shaft_length[0]],center=true);
			}
			translate([0,0,mid_width/2-shaft_length[0]-shaft_length[1]]) {
				cylinder(d=shaft_dia[1],h=shaft_length[1]);
				translate([shaft_dia[1]/2-0.2,0,shaft_length[1]/2])
					rotate(45)
						cube([bevel*1.44,bevel*1.44,shaft_length[1]],center=true);
			}

		}
	}

	module original() {
		translate(shift)
			resize(new_size, auto=true) rotate(new_rotation)
				import(filename, convexity=10);
	}

	module cut(r, t) {
		translate(t) rotate(r) {
			difference() {
				cube([200,200,bevel*2],center=true);
				minkowski() {
					linear_extrude(0.01, convexity=100)
						offset(-bevel+clearance)
							projection(cut=true)
								translate(-t) rotate(-r) original();
					mirZ() cylinder(r1=0,r2=bevel,h=bevel+clearance, $fn=12);
				}
			}
			cube([200,200,clearance],center=true);
		}
	}

	module mirX() {children(); mirror([1,0,0]) children();}
	module mirY() {children(); mirror([0,1,0]) children();}
	module mirZ() {children(); mirror([0,0,1]) children();}

	module pin(	is_pin=true,
				diameter=pin_dia,
				length=pin_length,
				gap = 2.5,
				length_clearance=clearance,
				diameter_clearance = shaft_clearance)
		{
		dc = diameter_clearance;
		lc = length_clearance;
		$fs=1;
		if(is_pin) {
			d = [diameter[0] -dc*2, diameter[1]-dc*2];
			l = [length[0]+lc*2, ((length[1]-dc*2)-(length[0]+lc*2))/2];
			g = (gap < d[1]-d[0]+dc) ? d[1]-d[0]+dc : gap;
			h = d[0]*0.75;
			echo(d=d,l=l,g=g,h=h);
			translate([0,0,h/2]) rotate([90,0,0]) difference() {
				intersection() {
					mirZ() shape(d,l);
					cube([diameter[1],h,(length[0]+length[1])*2], center=true);
				}
				hull()
					mirZ()
						translate([0,0,l[0]/2+l[1]-g/2-1])
							rotate([90,0,0])
								cylinder(d=g,h=length[1],center=true,$fn=12);
			}
		} else {
			d = diameter;
			l = [length[0],(length[1]-length[0])/2];
			union() {
				shape(d,l);
				translate([0,0,-0.1])
					cylinder(d1=d[1]+0.1*2,d2=d[0],h=(d[1]-d[0])/2+0.1);
			}
		}
		module shape(d,l) {
			union() {
				cylinder(d=d[0],h=l[0]/2+0.1);
				translate([0,0,l[0]/2])
					cylinder(d=d[1],h=l[1]/4+0.1);
				translate([0,0,l[0]/2+l[1]/4])
					cylinder(d1=d[1],d2=d[0]-dc*2,h=l[1]*3/4);
			}
		}
	}
}

```