[User]
Okay, I need a parametric OpenSCAD file that can generate fan brackets for PCBs. I've got a good idea of what I want, and I'm pretty much copying the design of an existing script I like, but I need it to be more flexible and include some specific features and options that aren't present in that one.

The main idea is to create brackets that attach to the sides of a PCB and then have mounting points for a fan. These brackets can either be mini-brackets (two screw holes for the fan) or full brackets (four screw holes for the fan and two sides). The brackets need to be customizable for different PCB widths, fan sizes, screw diameters and height, with an option for a strengthening cross-brace.

Here's a breakdown of the required parameters:

*   **`fan_size`**: This is the size of the fan in millimeters (e.g., 40, 50, 60, 80, 120).  If set to 0, the fan cutout and screw holes should be removed, creating a PCB spacer/foot.
*   **`fan_hole_spacing`**: The distance between two fan mounting holes (e.g., 32.00 for 40mm fan, 40.00 for 50mm, etc.). If set to a value larger than fan\_size, no screw holes should be created.
*   **`screw_diameter`**: The diameter of the screws (e.g., 3.25 for M3, 4.25 for M4). This will affect the size of both the screw hole and the hex nut cutout.
*   **`pcb_width`**: The width of the PCB in millimeters (e.g., 60.0 for RAMPS, 53.5 for Arduino).
*   **`bracket_height`**: The vertical distance from the bottom of the PCB to the bottom of the fan mounting surface. This is important for clearance.
*   **`bracket_length`**: The length of the bracket. A smaller value gives a mini-bracket; a larger value makes the full bracket.
*   **`bracket_thickness`**: The thickness of the bracket material.
*   **`cross_bracket`**: The height of the cross-brace that adds strength to the bracket. A value of 0 means no cross-brace.
*   **`lip_size`**: This should be a hidden variable. It's how much the bracket lips extend over the PCB and probably should be 1.75.

The code needs to be structured to handle the following:

1.  **Legs/PCB Attachment:** The bracket needs "legs" or clips that slide onto the sides of the PCB. The design should include small clearances for easier sliding over solder joints or connectors. These legs should have an internal lip that helps hold the PCB securely in place (the `lip_size`).
2.  **Fan Mounting:** It needs the ability to generate screw holes and hex nut cutouts based on the `screw_diameter` and `fan_hole_spacing`.
3.  **Fan Cutout:** The design needs a circular cutout in the center for the fan blades that goes all the way through the bracket.
4.  **Cross-brace:** An option to add a strengthening cross-brace between the two "legs" of the bracket and just below the fan mounting area.
5.  **Full vs Mini Bracket:** When `bracket_length` is shorter, it should be a mini-bracket (just the legs and fan mount). When it's longer it will effectively encase two sides of the fan. The script should account for either.
6.  **No Fan Cutout Option**: If `fan_size` is set to 0, there should be no fan cutout or screw holes. Instead, a simple spacer with the PCB attachment should be generated (a PCB foot).
7. **Hex Nut Cutouts**:  The hex nut cutouts should resize based on the `screw_diameter` parameter. They also must be a cutout and not a solid object, so that a nut can be inserted.

I’d like to have two additional modules to help with visualization during development, but they're not essential for the final product:
* **`assembly()`**: This module should generate two brackets, one top, and one bottom (flipped), along with a representation of the PCB so that we can see the assembly for testing.
* **`fan_mask()`**: This module should generate the screw holes, hex cutouts and the fan cut out independently.

Finally, I'd like the default module call to just be `bracket()`.

I'm not requesting any specific library to be used, but I'm open to recommendations. Let me know if anything is unclear.

[Assistant]
moab.scad:
```
// MOAB - MOther of All fan Brackets
// Design by Marius Gheorghescu, October 2013.
// Update log
// November 5th 2013:
//  - fan cutout (and the screw holes) can be removed entirely now to produce spacers or PCB feet
//  - hex nuts resize with screw size (need to vealidate in practice)
//  - cross-brace is configurable and can also be removed

// Typical values 40, 50, 60, 80. Set to 0 to not have a fan cutout.
fan_size = 40;

// Distance between two fan holes. Typical values: 32.00 for 40mm fan, 40.00 for 50mm fan, 50.00 for 60mm fan, 71.50 for 80mm fan, 105.00 for 120mm fan. Set to value larger than fan size to not have any screw holes
fan_hole_spacing = 32;

// Use 3.25mm for M3, 4.25mm for M4 and so on
screw_diameter = 3.25;

// width of the PCB. Common values: 60mm for RAMPS, 53.5mm for Arduino, 56mm for Raspberry Pi
pcb_width = 60.0;

// distance from bottom of the fan to PCB. Recommended value for RAMPS fuse clearance: 35mm
bracket_height = 36;

// how long the bracket needs to be, typically 10mm for mini brackets, or close to fan size for full brackets
bracket_length = 12;

// typically 2-4mm
bracket_thickness = 3.0;

// how tall is the cross brace that addds additional strength to the bracket, set to 0 to not have one
cross_bracket = 10;

/* [Hidden] */

// how much to go over the PCB
lip_size = 1.75;

// effective width of the bracket at the top
bracket_width = max(pcb_width, fan_size - 4);

module legs()
{

    difference() {
        union() {

            // left clip
            color([0,0,.5])
            translate([-pcb_width/2 + .5, -bracket_height + 2, 0])
                rotate([0, 0, 180])
                    cylinder(r=2.5, h=bracket_length, $fn=6, center=true);

            // left leg
            color([0,0,1])
            translate([-pcb_width/2 - bracket_thickness, -bracket_height + bracket_thickness/2, -bracket_length/2])
                cube([bracket_thickness, bracket_height, bracket_length]);

            // right clip
            color([0,0,.5])
            translate([pcb_width/2 - .5, -bracket_height + 2, 0])
                 rotate([0, 0, 180])
                     cylinder(r=2.5, h=bracket_length, $fn=6, center=true);

            // right leg
            color([0,0,1])
           translate([pcb_width/2 , -bracket_height + bracket_thickness/2, -bracket_length/2])
                cube([bracket_thickness, bracket_height, bracket_length]);

        }

        // left cutout
       translate([-pcb_width/2 + .5, -bracket_height + 2, 0])
            rotate([0, 0, 180])
                cylinder(r=1, h=bracket_length + 0.1, $fn=6, center=true);

        // right cutout
       translate([pcb_width/2 - .5, -bracket_height + 2, 0])
            cylinder(r=1, h=bracket_length + 0.1, $fn=6, center=true);

        // PCB lips clearance
        translate([0, -bracket_height + bracket_thickness + -.5,0])
            cube([pcb_width - 2*lip_size, 12, bracket_length + 0.1], center=true);

        // PCB
        translate([0, -bracket_height + 2, 0])
            cube([pcb_width, 1.75, bracket_length + 0.1], center=true);

    }

}

module fan_mask()
{
    // M3 screw
    translate([-fan_hole_spacing/2, -fan_hole_spacing/2, 0])
        cylinder(r=screw_diameter/2, h=bracket_height, $fn=20, center=true);
    translate([fan_hole_spacing/2, -fan_hole_spacing/2, 0])
        cylinder(r=screw_diameter/2, h=bracket_height, $fn=20, center=true);
    translate([-fan_hole_spacing/2, fan_hole_spacing/2, 0])
        cylinder(r=screw_diameter/2, h=bracket_height, $fn=20, center=true);
    translate([fan_hole_spacing/2, fan_hole_spacing/2, 0])
        cylinder(r=screw_diameter/2, h=bracket_height, $fn=20, center=true);

    // M3 nuts
    translate([-fan_hole_spacing/2, -fan_hole_spacing/2, 0])
        cylinder(r=screw_diameter, h=4, $fn=6, center=true);
    translate([fan_hole_spacing/2, -fan_hole_spacing/2, 0])
        cylinder(r=screw_diameter, h=4, $fn=6, center=true);
    translate([-fan_hole_spacing/2, fan_hole_spacing/2, 0])
        cylinder(r=screw_diameter, h=4, $fn=6, center=true);
    translate([fan_hole_spacing/2, fan_hole_spacing/2, 0])
        cylinder(r=screw_diameter, h=4, $fn=6, center=true);

    // fan blade clearance
    difference() {
        cylinder(r=fan_size/2, h=bracket_height, $fn=120, center=true);

        // $TODO - add support around the screws if they are too close to the blades
        // also need to add support if the bracket is not wide (tall) enough
    }
}

module bracket()
{
    difference() {
        union() {

            // fan base
            translate([0, 0, 0])
                cube([bracket_width + 2*bracket_thickness, bracket_thickness, bracket_length], center=true);

            // extra strength
            color([1,.5,0])
            translate([0, -cross_bracket/2, -bracket_length/2 + bracket_thickness/4])
                cube([pcb_width + 1, cross_bracket, bracket_thickness/2], center=true);

            legs();
        }

        translate([0, -bracket_thickness, -bracket_length/2 + fan_size/2 + bracket_thickness/2])
        rotate([90,0,0])
            fan_mask();

        }
}

module assembly()
{
    color([1,0,0])
    translate([0, 0, -fan_size/2])
        bracket();

    color([1,0,0])
    //translate([0, 0, fan_size/2])
    rotate([0,180,0])
        bracket();

    color([0,.5,0])
    translate([0, -bracket_height + 2, 0])
        cube([pcb_width - 1, 1.75, fan_size*1.5], center=true);

}

//assembly();
bracket();
//fan_mask();
```


[User]
Okay, I'm looking to have a custom trigger extension designed for the Nintendo 3DS XL shoulder buttons. I've got a version I've been messing with, but I'd like a fresh design done from scratch with a focus on being parametric and adjustable.

Here’s what I need:

**General Functionality:**

*   The design is an extension that attaches to the 3DS XL's shoulder button (either the left or right one) and allows it to be pressed even when the system is resting on a flat surface.
*   It should be a single printable part.
*   It needs to be able to work on both the left and right shoulder buttons using a mirror option.

**Parameters I need to control:**

*   **Trigger Height (triggerZ):** The vertical height of the trigger from the bottom of the 3DS shoulder button face. This should be adjustable.
*   **Trigger Distance (triggerY):**  The distance of the trigger from the face of the shoulder button along the back of the 3DS.
*   **Trigger Width (triggerWidth):** The width of the trigger itself.
*   **Trigger X Offset (triggerXoffset):**  The horizontal distance of the trigger from the system (likely in tenths of mm, please use mm for all code.)
*   **Snap Fit Option (snapFit):** A boolean option (1 for yes, 0 for no) to include a snap-fit feature to engage a hole on the back of the 3DS.
*   **Peg Shape (pegShape):** An option (0 for Square, 1 for Round) for the shape of the snap-fit peg.
*   **Side (side):** An option (0 for Left, 1 for Right) to mirror the design for either shoulder button.

**Advanced Parameters (these should be easily adjustable in customizer):**

*   **Peg Size (pSize):** The width/diameter of the snap-fit peg in hundredths of mm, which needs to be converted into mm for the code.
*   **Peg Depth (pDepth):** The depth of the snap-fit peg, also in hundredths of mm to be converted.
*   **Peg Gap (pGap):** The width of the gap cut out of the peg, in hundredths of mm to be converted.
*   **Peg Lip (pLip):**  The size of the lip on the peg for the snap fit, in hundredths of mm to be converted.

**Fixed Dimensions (These are for the base geometry and don't need to be adjusted in the customizer, but need to be used):**

*   **Shoulder Button Width (pWidth):** 22mm
*   **Part Thickness (pThickness):** 4mm
*   **Shoulder Button Height (pHeight):** 8mm
*   **"Magic" Height Number (height):** 10mm for the support cylinder cut.

**Specific Requirements for the Design:**

*   The snap-fit feature should be an optional part of the design.
*   The snap-fit feature should have a variable gap for good fit, with adjustable shape (round or square peg).
*   The trigger extension should connect to the button face and the extension base with a smooth curve and then extend perpendicularly toward the table.
*   The trigger extension should have a cylindrical cutout along its length to reduce the amount of material used while still maintaining rigidity.

**Libraries:**

I'm not aware of any additional libraries I might need for this. So I suppose that's just using what's built in to OpenSCAD.

**In short,** I'm looking for a well-commented and customizable OpenSCAD file that allows me to control all these parameters to get the perfect trigger extension for my 3DS XL. I need to be able to toggle a snap fit on or off with an easy option to customize the snap-fit’s dimensions. Please make it easy to use for a novice and use descriptive names for all parameters in the SCAD file.

[Assistant]
trigger_v1_2.scad:
```
/* Version 1.2 */
//Trigger height from the bottom of should button:
triggerZ=0; // [0:10]
//Distance from face of shoulder button to trigger:
triggerY=30; // [5:50]
//Width of trigger:
triggerWidth=18; // [10:30]
//Horizontal distance from system in tenths of mm:
triggerXoffset=20; // [15:80]
offset=triggerXoffset/10;
//Do you want the snap fit option?
snapFit=1; // [1:Yes, 0:No]
//Round peg is recommended.
pegShape=1; // [0:Square, 1:Round]
//Left or Right Button?
side=1; // [0:Left, 1:Right]

/*[Advanced]*/
//Peg width in hundredths of mm (350 is 3.50mm)
pSize=350;//[222:400]
pegSize=pSize/100;
//Peg Depth in hundredths of mm (400 is 4.00mm)
pDepth=400;//[300:500]
pegDepth=pDepth/100;
//Peg Gap width in hundredths of mm (100 is 1mm)
pGap=125;//[10:150]
pegGap=pGap/100;
//Peg Lip size in hundredths of mm (50 is 0.50mm)
pLip=50;//[10:100]
pegLip=pLip/100;

/* [Hidden] */
pWidth=22;//width of shoulder button face
pThickness=4;//thickness of part
pHeight=8;//height of shoulder button face
height=10;//magic number :-)

if (side==1){
	snap();extension();}
else{
	mirror([-1,0,0]){snap();extension();}
}

module snap(){if (snapFit == 1){
	translate([-10,-1,0])cube([10,2,pHeight]);//snap base

if (pegShape == 0){
	translate([-8, -1-pegDepth, 3])
	difference(){
		union(){
			cube([pegSize, pegDepth, pegSize]);
			translate([-pegLip, 0, 0])cube([pegSize +2*pegLip,1,pegSize]);
			}

		translate([pegSize/2 - pegGap/2, -1, -1])cube([pegGap, pegDepth+1, pegSize+2]);
		}
	}
if (pegShape == 1){
	translate([-8, -1-pegDepth, 3])
	difference(){
		union(){
			translate([pegSize/2,pegDepth,2])
			rotate([90,0,0])
			cylinder(h=pegDepth-1, r=pegSize/2, center=false, $fn=40);

			translate([pegSize/2,1,2])
			scale([1,1,.8])
			rotate([90,0,0])
			cylinder(h=1, r1=pegSize/2+pegLip, r2=pegSize/2, center=false, $fn=40);
			}

		translate([pegSize/2 -pegGap/2, -1, -1])cube([pegGap, pegDepth+1, pegSize+2]);
				}
			}
		}
	}

module extension(){
	difference(){
		union(){
			cube([pWidth,pThickness,pHeight]);

			hull(){
				translate([pWidth,0,0])cube([pThickness, pThickness, pHeight]);
				translate([pWidth+offset, -triggerY, triggerZ])cube([pThickness, pThickness, pHeight]);
				}

			translate([pWidth+offset,-triggerY,triggerZ])
			cube([triggerWidth,pThickness,pHeight]);
			}

		translate([pWidth+offset+pThickness, -triggerY, triggerZ-1])
		difference(){
			cube([triggerWidth, height, height]);

			translate([-1,0,height/2])
			rotate([0,90,0])
			cylinder(h = triggerWidth+2, r=height/2, center = false, $fn=40);
		}
	}
}
// preview[view:south, tilt:top]
```


[User]
Okay, I need to design a bracket to mount a power supply to my 3D printer frame. I'm using a K8200, but I want to make the design parametric so I can easily adjust it for different power supplies.

Here's what I'm thinking. The bracket should have a rectangular opening to fit around the power supply. I need the following parameters:

*   **`power_supply_width`**: The width of the power supply in millimeters.
*   **`power_supply_height`**: The height of the power supply in millimeters.
*   **`bracket_thickness`**: The thickness of the bracket material, ideally the same all around, or configurable for the base and arms separately if that's not too hard.
*   **`bracket_length`**: The total length of the main bracket piece
*   **`mounting_arm_length`**: The length of the arms that extend out to mount the bracket. I think I need two, one on either side.
*   **`mounting_arm_width`**: The width of the mounting arms.
*   **`mounting_arm_thickness`**: The thickness of the mounting arms.
*   **`mounting_hole_dia`**: The diameter of the holes for attaching the bracket to the printer frame.

The basic shape is a rectangular frame around the power supply, with mounting arms that extend outwards. The mounting arms will be perpendicular to the face of the bracket and have two mounting holes each. The frame should have rounded corners and a gap around the perimeter of the PSU to allow the thickness of the bracket. I want the mounting arms to be round cylinders rather than just square extrusions. The mounting arms could also be angled if required for the specific application. It would be great if I can control that angle. Also, it would be nice to have a small hole for a zip tie or something at the base of the mounting arm.

I'd like to use OpenSCAD for this design. Can you provide the code? I don't need any external libraries, just plain OpenSCAD code.

[Assistant]
nthalter.scad:
```

dim = [ 30, 50 ];
//dim = [ 38, 64 ];

c = 0.3;

w = dim[0]+c;
h = dim[1]+c;
l = 20;
t = 2;
b = 27.5+c*2;

difference()
{
	cube( [ w+t*2, h+t*2, l ], center = true );

	cube( [ w, h, l*2 ], center = true );
}

translate( [ w/2+t+b/2, 0, 0 ] )
difference()
{
	union()
	{
		for ( a = [ -1, +1 ] )
		{
			translate( [ 0, a*( b/2+t/2 ), 0 ] )
				cube( [ b, t, l ], center = true );
			translate( [ -b/2, a*( b/2+t ), 0 ] )
				cylinder( r = t, h = l, center = true, $fn = 4 );
		}

		for ( a = [ 0, 90, 270 ] ) rotate( [ 0, 0, a ] )
		{
			if ( a == 0 )
		translate( [ -b/2+1.5, 0, 0 ] )
			cube( [ 5, 4.5, l ], center = true );

		translate( [-b/2+0.75, 0, 0 ] )
			cube( [ 1+2.5, 12-c, l ], center = true );

		translate( [ -b/2+0.15, 0, 0 ] )
			cube( [ 1+1.25, 16-c, l ], center = true );
		}
	}

	//translate( [ w/2+t+3.5+2, 0, 0 ] )
	//	cube( [ 5.5, 10, 10 ], center = true );

	for ( a = [ 90, 270 ] ) rotate( [ 0, 0, a ] )
	{
		translate( [ -b/2-1, 0, 0 ] ) rotate( [ 0, 90, 0 ] )
			cylinder( r = 2.65, h = 40, center = true, $fn = 6 );

		translate( [ -b/2-1.75, 0, 0 ] ) rotate( [ 0, 90, 0 ] )
			cylinder( r2 = 2.65, r1 = 10, h = 7, center = true, $fn = 6 );
	}
}

```


[User]
Okay, I'm looking for an OpenSCAD design for a simple enclosure for a printed circuit board. I've got the basic concept down, but I need it to be parametric so I can easily adjust it for different PCBs in the future.

Here's what I want:

*   **Basic Box Shape:** The enclosure should be essentially a rectangular box, split into two halves: a bottom and a top.
*   **Parametric PCB Dimensions:** The design *must* be parameterized to accept the PCB's length, width, and height as input variables. Let's call these variables `pcb_length`, `pcb_width`, and `pcb_height`, respectively.
*   **Snap-Fit Mechanism:** The top and bottom halves should snap together. I envision this using some kind of interlocking tabs or protrusions on the sides. The design should ensure a secure fit to hold the PCB in place.
*   **Internal PCB Supports:** Inside the box, there should be some supports to hold the PCB off the bottom of the case and keep it centered. I'd like these supports to be circular and positioned at the four corners of the PCB.
*   **Cable Openings:**  There should be openings on the left and right side of the enclosure for cables. These openings should be centered on the left/right side and should be sized to fit commonly sized cables (maybe 10-12 mm diameter?) It would be nice if the size of these openings could be adjusted with a parameter (`cable_opening_diameter`).
*   **Top-Half Lid:** The top half of the case needs to be designed so it mates well with the bottom half and closes securely.
*   **Clearance:** The enclosure needs to provide a small clearance (e.g., 1-2mm) around all sides of the PCB. This should also be a parameter (`clearance`).
*   **Wall Thickness:** The wall thickness of the enclosure should also be adjustable (e.g. `wall_thickness`).
*   **Assembly:** The two halves should align perfectly when assembled, and the PCB should fit snugly between the supports in the bottom half of the enclosure.
*   **No screw holes needed**. This should be designed for snap-fit only.

I envision that the design should work well even if printed in white or transparent filament where the LEDs of the board could still be visible through the case.

I don't need any specific library dependencies for now, let's just keep it simple with standard OpenSCAD.

Could you provide me with an OpenSCAD file that implements this parametric enclosure?

[Assistant]
pcb_housing.scad:
```

pcb = [ 65, 40, 22 ];
//pcb = [ 80, 44, 16 ];

c = 0.3;

difference()
{
translate( [ 0, 0, 0 ] )
 box( pcb[0]+6, pcb[1]+6, pcb[2]+8 );
translate( [ 0, 0, 1 ] )
 box( pcb[0]+2, pcb[1]-4, pcb[2]+6 );
translate( [ 0, 0, 2 ] )
 box( pcb[0]+2, pcb[1]+2, pcb[2]+4 );

for ( a = [ -1, +1 ], b = [ -1, +1 ] )
	translate( [ a*pcb[0]/3, b*pcb[1]/3, 0 ] )
		cylinder( r = 3, h = pcb[2]*2, center = true );

translate( [ 0, 0, -pcb[2]/2+12+3 ] ) rotate( [ 0, 90, 0 ] ) scale( [ 1, pcb[1]/16, 1 ] )
 cylinder( r = 8, h = pcb[0]*2, center = true );

for ( a = [ -1, +1 ] )
	translate( [ a*pcb[0]/4, 0, -pcb[2]/2+7 ] ) rotate( [ 90, 0, 0 ] )
		cylinder( r = 2, h = pcb[1]*2, center = true, $fn = 12 );

translate( [ 0, 0, 12 ] )
	box( pcb[0]+10, pcb[1]+10, pcb[2]-8/2 );
}

for ( a = [ -1, +1 ] )
translate( [ a*(pcb[0]/2+7.1), 0, - pcb[2]/2-2 ] )
	difference()
	{
		box( 12, 25, 4 );
		cylinder( r = 2.5+c, h = 10, center = true );
	}

translate( [ 0, pcb[1]+10, -c/2 ] )
rotate( [ 180, 0, 0 ] )
difference()
{
union()
{
	translate( [ 0, 0, 3 ] )
		box( pcb[0]+2-2*c, pcb[1]+2-2*c, pcb[2]+2-c );
	for ( a = [ -1, +1 ], b = [ -1, +1 ] )
		translate( [ a*pcb[0]/4, b*pcb[1]/2, -pcb[2]/2+7 ] )
			sphere( r = 2.15, center = true, $fn = 24 );
}
translate( [ 0, 0, 1 ] )
	box( pcb[0]-2, pcb[1]-2, pcb[2] );
translate( [ 0, 0, 3-(pcb[2]+2-c)/2 ] ) rotate( [ 0, 90, 0 ] ) scale( [ 1.25, (pcb[1]-3)/16, 1 ] )
	cylinder( r = 8, h = pcb[0]*2, center = true );
}

module box( x, y, z, w = 0 )
{
	difference()
	{
		cube( [ x - ( w < 0 ? w*2 : 0 ), y - ( w < 0 ? w*2 : 0 ), z - ( w < 0 ? w*2 : 0 ) ], center = true );

		if ( w != 0 )
			cube( [ x - ( w > 0 ? w*2 : 0 ), y - ( w > 0 ? w*2 : 0 ), z - ( w > 0 ? w*2 : 0 ) ], center = true );
	}
}

```


[User]
Okay, I'm looking to design a parametric holder for a glass whiteboard, specifically one that can hold both markers and an eraser. I've already got two separate SCAD files, one for an eraser holder and one for a marker holder, but I'd like a single file that combines them and lets me adjust the dimensions to fit my whiteboard and my specific marker/eraser sizes.

Here's what I'm thinking:

*   **Combined Holder:** The design should be a single unit that can be attached to a glass whiteboard. It should have two distinct sections: one for markers (shallower tray), and one for the eraser (deeper tray).
*   **Parametric Design:** I need to be able to adjust several key dimensions through variables.
    *   `wall_thickness`: The thickness of the walls for both the clip and the trays.
    *   `marker_tray_height`: The height of the marker tray section.
    *   `marker_tray_width`: The width of the marker tray section.
    *   `eraser_tray_height`: The height of the eraser tray section.
    *   `eraser_tray_width`: The width of the eraser tray section.
    *   `clip_height`: The height of the clip that holds onto the whiteboard. This should be the same for both sides.
    *  `clip_width`: The width/thickness of the clip that holds onto the whiteboard. This should be the same for both sides.
    *   `holder_length`: The overall length of the holder.
*   **Attachment:** The clip should be designed to press fit onto the glass whiteboard, with the dimensions for the whiteboard's thickness being parametric using a variable.
    * `glass_thickness`: The thickness of the glass whiteboard being attached to.
*   **Placement:** The marker and eraser trays should be next to each other, with the clip running along the back of the unit. The orientation should have the marker tray on the left side when looking at the front.
*   **Library Use:** I'd prefer if you could use the `BOSL2` library, as it has a lot of useful functions that could help with a parametric design like this.
*   **No Special Features:**  I don't need rounded corners or fancy features. The design should be simple and functional.

I'd like the output to be a single OpenSCAD file that incorporates all of this, using variables at the top so that it's easy to modify the dimensions.

Essentially, I'm looking to consolidate and parameterize the attached files into a single, robust solution.

[Assistant]
Whiteboard_tray_-_eraser.scad:
```
wall_thickness = 2;
tray_height = 15;
tray_width = 30;
clip_height = 15;
clip_width = 4;
holder_length = 130;

module marker_holder() {
  translate([-holder_length / 2, -(clip_width + tray_width) / 2, 0]) {
		union() {
      	difference() {
        		cube([holder_length, clip_width + 2 * wall_thickness, clip_height]);
        			translate([0, wall_thickness, wall_thickness]) {
          			cube([holder_length, clip_width, clip_height]);
      			}
    		}
    		translate([0, clip_width + wall_thickness, 0]) {
      		difference() {
        			cube([holder_length, tray_width + 2 * wall_thickness, tray_height]);
        				translate([0, wall_thickness, wall_thickness]) {
          				cube([holder_length, tray_width, tray_height]);
						}
        		}
      	}
    	}
  	}
}

marker_holder();

```
Whiteboard_tray_-_marker.scad:
```
wall_thickness = 2;
tray_height = 7;
tray_width = 15;
clip_height = 11;
clip_width = 4;
holder_length = 140;

module marker_holder() {
  translate([-holder_length / 2, -(clip_width + tray_width) / 2, 0]) {
		union() {
      	difference() {
        		cube([holder_length, clip_width + 2 * wall_thickness, clip_height]);
        			translate([0, wall_thickness, wall_thickness]) {
          			cube([holder_length, clip_width, clip_height]);
      			}
    		}
    		translate([0, clip_width + wall_thickness, 0]) {
      		difference() {
        			cube([holder_length, tray_width + 2 * wall_thickness, tray_height]);
        				translate([0, wall_thickness, wall_thickness]) {
          				cube([holder_length, tray_width, tray_height]);
						}
        		}
      	}
    	}
  	}
}

marker_holder();

```


[User]
Okay, so I've been messing around with OpenSCAD and made this arrowhead thing. It's kinda cool, but it's also kind of a mess of hardcoded points and triangles, and I'd really like it to be more flexible and easier to adjust.

Right now, I have a file named `arrowhead.scad` where I define `length`, `width`, and `height` as parameters and then I just list out a bunch of vertices and faces for a `polyhedron`. It *works*, but it's a pain to change anything significant, and I feel like I’m fighting with the coordinates more than designing.

I'd like to have an OpenSCAD file that creates a similar arrowhead shape, but with a much more parametric approach. I really like the general design – the curved edges leading to the notches near the base, and then the point. I'd also want to keep the same basic idea of having a slight thickness to it (the `height`).

Here are the specific things I'd want to be adjustable:

*   **Overall Length:** The total length of the arrowhead, from base to point.
*   **Base Width:** The width of the arrowhead at the base.
*   **Thickness:** The overall thickness of the arrowhead.
*   **Notch Depth:** How deep the notches are cut into the sides.
*   **Notch Width:** How wide each notch is at its widest point.
*  **Notch Offset:** The position of the notch on the arrowhead (along the length).
*   **Curve Amount:** How curved the edges of the base are. I'd also like to control the amount of curve at the top surface, too.
* **Point Offset**: The point is currently offset a little bit from the edge of the "blade" along the z-axis (height) and I'd like to control that offset value.

I think it would be best if the arrowhead was generated using a 2D shape that is then extruded to a given height. The 2D shape should be created using OpenSCAD's curve drawing abilities. That is, I want to specify key points, and then have the curve be drawn between the points.

I don't need any fancy texturing or anything like that, just a good, solid parametric arrowhead that I can adjust easily. I am also not really sure what libraries would help me achieve this design, but I think that `BOSL2` might be useful.

[Assistant]
arrowhead.scad:
```
length = 11; //[8:100]
width = 8; //[5:60]
height = 6; //[1:30]

polyhedron(
points=[
//~-~!!BOTTOM!!~-~
//curve
[1-width/2,1,0], //0
[0,0,0], //1
[width/2-1,1,0], //2
//left notch
[2-width/2,2,0], //3
[1.8-width/2,2.2,0], //4
[0.65-width/2,1.25,0], //5
[0.45-width/2,2.2,0], //6
//right notch
[width/2-2,2,0], //7
[width/2-1.8,2.2,0], //8
[width/2-0.65,1.25,0], //9
[width/2-0.45,2.2,0], //10
//point
[0,length,0], //11
//~-~!!TOP!!~-~
//curve
[1.5-width/2,1.5,height/10], //12
[0,1,height/10], //13
[width/2-1.5,1.5,height/10], //14
//left notch
[2-width/2,2,height/10], //15
[1.8-width/2,2.2,height/10], //16
[1.15-width/2,1.75,height/10], //17
[1.05-width/2,2.65,height/10], //18
//right notch
[width/2-2,2,height/10], //19
[width/2-1.8,2.2,height/10], //20
[width/2-1.15,1.75,height/10], //21
[width/2-1.05,2.65,height/10], //22
//point
[0,length-2.5,height/10] //23
],
triangles=[
//~-~!!BOTTOM!!~-~
//base
[0,1,2],
//inside notches
[0,7,3],
[7,0,2],
//above notches
[8,4,3],
[8,3,7],
//outside notches
[5,4,6], //left
[8,9,10], //right
//point
[11,6,4],
[11,4,8],
[11,8,10],
//~-~!!WALLS!!~-~
//!!base!!
//left
[0,12,1],
[12,13,1],
//right
[1,13,14],
[1,14,2],
//!~!notches!~!
//!!left!!
//inside
[3,15,0],
[15,12,0],
//middle
[4,16,3],
[16,15,3],
//outside
[5,17,4],
[17,16,4],
//!!right!!
//inside
[2,14,7],
[14,19,7],
//middle
[7,19,8],
[19,20,8],
//outside
[8,20,9],
[20,21,9],
//!~!outside top!~!
//!!left!!
//bottom
[5,6,17],
[6,18,17],
//point
[6,11,18],
[11,23,18],
//!!right!!
//bottom
[9,21,10],
[21,22,10],
//point
[10,22,11],
[22,23,11],
//~-~!!TOP!!~-~
//base
[12,14,13],
//inside notches
[12,15,19],
[12,19,14],
//above notches
[16,20,15],
[15,20,19],
//outside notches
[16,17,18], //left
[20,22,21], //right
//above all that
[16,18,22],
[16,22,20],
//point
[18,23,22]
]
);
```


[User]
Okay, I'd like to design a customizable nameplate using OpenSCAD. I have a basic design in mind, but I want it to be more parametric and easier to adjust.

Here's what I'm looking for:

*   **Base Plate:** A rectangular base plate. I need to be able to control its width, height, and depth (thickness).
*   **Inset Border:** The plate should have an inset border that runs along the perimeter of the face of the plate, creating a slightly recessed region on the front. This inset should have a consistent depth and its offset from the outer edges of the plate should be adjustable.
*   **Text Lines:** Three lines of text that can be customized. I need to be able to specify the text content, the text height, the text thickness, and the vertical position of each line on the plate. The horizontal position of all text should be an inset, the same as the border.
*   **Parametric Control:** I'd like all dimensions (plate size, border inset, text size, text positions, etc.) to be controllable through parameters at the top of the file. It should be easy to modify the design by changing these parameters.
*  **Libraries:** I'm currently using the `write/Write.scad` library for text. I'd like to continue using that, if possible.

Here's what my current, basic code looks like:

```
	/*
*****************************************************
By Daniel Lindahl
i@d9l.se
2013
*****************************************************
*/
use <write/Write.scad>
//CUSTOMIZER VARIABLES
build_plate_selector = 1; //[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]
line_1 = "Name";
line_2 = "Profession";
line_3 = "Company";
plate_height = 40;
plate_width = 100;
plate_depth  = 3;
text_size = 6;
intend = 4;

rad1 = plate_height/4*3-(plate_height/12) ;
rad2 = plate_height/4*2-(plate_height/12) ;
rad3 = plate_height/4*1-(plate_height/12) ;
//CUSTOMIZER VARIABLES END

difference() {
				cube([plate_width,plate_height,plate_depth],center=false);
					# translate ([1,1,plate_depth]) {
										cube([plate_width-2,plate_height-2,1],center=false);
					}
}

translate([intend,rad1,plate_depth])
write(line_1 ,h=text_size,t=2,center=false);

translate([intend,rad2,plate_depth])
write(line_2,h=text_size ,t=2,center=false);

translate([intend,rad3,plate_depth])
write(line_3,h=text_size ,t=2,center=false);

```

Specifically, instead of using those calculated 'rad' variables, I'd prefer the vertical position of the text lines to be calculated based on some parameters that will be easier to understand, like an offset and a spacing.  The text inset and border inset should use the same parameter.  I'd also like to avoid using those magic number values used in the difference operation to create the inset and instead use named variables.

[Assistant]
customnameplate.scad:
```
	/*
*****************************************************
By Daniel Lindahl
i@d9l.se
2013
*****************************************************
*/
use <write/Write.scad>
//CUSTOMIZER VARIABLES
build_plate_selector = 1; //[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]
line_1 = "Name";
line_2 = "Profession";
line_3 = "Company";
plate_height = 40;
plate_width = 100;
plate_depth  = 3;
text_size = 6;
intend = 4;

rad1 = plate_height/4*3-(plate_height/12) ;
rad2 = plate_height/4*2-(plate_height/12) ;
rad3 = plate_height/4*1-(plate_height/12) ;
//CUSTOMIZER VARIABLES END

difference() {
				cube([plate_width,plate_height,plate_depth],center=false);
					# translate ([1,1,plate_depth]) {
										cube([plate_width-2,plate_height-2,1],center=false);
					}
}

translate([intend,rad1,plate_depth])
write(line_1 ,h=text_size,t=2,center=false);

translate([intend,rad2,plate_depth])
write(line_2,h=text_size ,t=2,center=false);

translate([intend,rad3,plate_depth])
write(line_3,h=text_size ,t=2,center=false);

```


[User]
Okay, I'm looking for a way to generate customizable bowls, vases, or cups using OpenSCAD. I've seen some designs that are based on sections of spheres, and they can be really interesting.

Ideally, I'd like a design where I can control the following:

*   **Overall Size:**  I need to be able to set the general radius or size of the bowl.
*   **Wall Thickness:** The thickness of the bowl's wall should be adjustable.
*   **Resolution:** I'd like a way to control the smoothness of the curves. Higher resolution for smoother curves, lower for a more faceted, polygon look.
*   **Cut Type:** I'd like two cutting options for the top edge of the bowl:
    *   **Straight Cut:** A simple, flat cut at an angle around the bowl. I'd need to control the angle of this cut. I'd also need to be able to specify what percentage of the bowl's overall height to cut off. I would like control over the spin of this cut.
    *   **Curved Cut (Pretty Cut):** A more decorative, curved cut using a cylinder. I need to specify the radius of this cut, the offset (how far up/down the cylinder is positioned relative to the bowl), and again the angle, as well as the spin of this cut.
*   **Squash/Stretch:** I need to independently squash or stretch the bowl in the X, Y, and Z directions. This way I can get vases or other shapes.
*   **Wall Shaping:** It would be amazing to control the spin and tilt of the bowl walls. This would enable a unique look by not having them oriented vertically.  I'd need control over the tilt in the X and Y direction and the spin around the Z axis.

I've played with some designs that do most of this, but I'd really love to have this all in one place and be able to control all these parameters.  I don't need any special libraries. If it's possible, it would be nice to have comments in the code explaining what each parameter does.

[Assistant]
bowl.scad:
```
/*
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/

author: Eric Romano (@gelstudios on twitter)
title: Bowl Factory
about: these modules generate a bowl from a spherical section, with lots of parameters for customization.
version: 1.1

-------------------
module: bowl
description: generates a bowl, parameters are optional.
parameters: radius of bowl, wall thickness, wall spin, wall tilt, percent of bowl to retain after trimming the lip, angle of trim, z-angle of trim, resolution.
ex: bowl(60,3,.50,15,0,16);
note: higher resolutions look nice (32+), lower resolutions have a cool polygon look (try 5-16).

-------------------
module: prettycut
description: uses a cylinder to cut a rounded profile into the bowl.
parameters: radius of cut, position of trim relative to center, angle of trim, z-angle of trim, resolution.
ex: prettycut(200,10,15,0,30)bowl(60,3,1,0,0,16);
note: prettycut is performed after the lip of the bowl is cut, so use 1 for bowl trim parameter if using it (see prettycut example). It looks best when the radius parameter is greater than the bowl's.
*/

BowlSize=50; //[10:300]
WallThickness=2; //[1:30]
//Higher values are "Smoother", Lower res has a cool polygon look.
BowlResolution=16; //[3:128]

CutType=1; //[0:Straight,1:Pretty]
CutAngle=5; //[0:90]
CutSpin=45; //[0:180]

//Percentage used by straight cut only
BowlTrim=50; //[0:100]
Trim=BowlTrim/100;

//Pretty cut only, zero is half way up the bowl.
PrettyCutOffset=0; //[-50:50]
PrettyCutResolution=100; //[3:128]
PrettyCutRadius=200; //[50:300]

/* [Shape] */
//Percentage
VerticalSquashOrStretch=75; //[25:300]
ZSquash=VerticalSquashOrStretch/100;
//Percentage
HorizontalSquashOrStretch=100; //[25:300]
YSquash=HorizontalSquashOrStretch/100;
//Percentage
DepthSquashOrStretch=100; //[25:300]
XSquash=DepthSquashOrStretch/100;

/* [Advanced] */
//Degrees
BowlWallSpin=15; //[0:180]
BowlWallXTilt=0; //[-90:90]
BowlWallYTilt=15; //[-90:90]

if (CutType==1){
	scale([XSquash,YSquash,ZSquash])
	prettycut(PrettyCutRadius,PrettyCutOffset,CutAngle,CutSpin,PrettyCutResolution)
	bowl(BowlSize,WallThickness,1,BowlWallSpin,BowlWallXTilt,BowlWallYTilt,0,0,BowlResolution);
} else {
	scale([XSquash,YSquash,ZSquash])
	bowl(BowlSize,WallThickness,Trim,BowlWallSpin,BowlWallXTilt,BowlWallYTilt,CutAngle,CutSpin,BowlResolution);
}

module bowl(size=50,wall=2,percenttrim=.60,spin=0,tilt=0,tilt2=0,cutangle=0,cutangle2=0,bowlres=50){
$fn=bowlres;
trimvol=2*size;
trimposition=trimvol*percenttrim;
trimbottom=size*.2;
bottomcut=size/2;
insphere=1-wall/size;

difference(){
	difference(){
		difference(){
			//outer wall
			intersection(){
				rotate([tilt,tilt2,spin])sphere(size);
				translate([0,0,trimbottom])
				cube([trimvol,trimvol,trimvol],center=true);
				}
			//inner wall
			intersection(){
				rotate([tilt,tilt2,spin])sphere(size*insphere);//rotate for face angle, need parameter
				translate([0,0,trimbottom*1.3])
				cube([trimvol,trimvol,trimvol],center=true);
				}
			}
		rotate([cutangle,0,cutangle2])
		translate([0,0,trimposition])
		cube([4*trimvol,4*trimvol,trimvol],center=true);
		}
	translate([0,0,-1.28*size])
	cylinder(bottomcut,bottomcut,bottomcut);
	}
}

module prettycut(pcutsize=200,offset=0,pcutangle=0,pcutangle2=0,pcutres=100){
$fn=pcutres;
radius=pcutsize;

difference(){
	child(0);

	translate([0,0,offset])
	rotate([pcutangle,0,pcutangle2])
	translate([0,0,radius])
	rotate([90,0,0])
	cylinder(4*radius,radius,radius,center=true);
	}
}

```


[User]
Okay, I'd like to design a parametric drinking cup, or "becher" as the example file calls it. I want to be able to control the top diameter, the bottom diameter, the height, and the wall thickness of the cup.

The basic shape should be a frustum with a hollowed-out interior, basically like a truncated cone. The exterior should transition smoothly from the bottom diameter to the top, and the interior wall should maintain a consistent thickness.

I like the approach in the provided `becher.scad` which uses `rotate_extrude` with a `polygon` to define the outside and the inside of the cup. I'd like to keep that method of construction because it is very robust, but I want to add to the parameters for further customization of the design.

Specifically I'd like to add:
*   **A bottom rounding radius:** This would round the edge at the bottom of the cup, on the exterior, so it's not a sharp point.
*   **A top rounding radius:** This would similarly round the edge at the top of the cup, also on the exterior.
*   **A handle:** I'd like the option to include a handle, and to control the size and position of this handle. I'm thinking of a fairly simple, arch-like handle. The handle should also be able to connect to the mug at a defined position along the side.
*  **Customizable fillet:** I would like to be able to adjust the fillet which creates the interior mug shape. This is controlled in the original `becher.scad` file with the addition of 0.2 to the z value of `pi`. I would like a named variable for this, and the ability to use either a single value, or a separate value for the top and the bottom of the cup, which would produce an angled interior wall in this region.

I'm not using any specific libraries at this point, but I would be interested to know what existing libraries might have related functions in them in the future.

Can you generate an OpenSCAD file that meets these requirements?

[Assistant]
becher.scad:
```
//Top Diameter
d1=55;
//Bottom Diameter
d2=40;
//Height
h=65;
//Thickness
t=3;

becher(d1=d1,d2=d2,h=h,t=t);

module becher(d1=55,d2=40,h=65,t=3)
{
  p1=[d2/2,0];
  p2=[(d2/2)+t,0];
  p3=[(d1/2)+t,h];
  p4=[d1/2,h];

  pa=[[0,0],p2,p3,[0,h]];
  pi=[[0,t],[d2/2,t],[d1/2,h+0.2],[0,h+0.2]];

  difference() {
    rotate_extrude($fn=180) polygon(points=pa);
    rotate_extrude($fn=180) polygon(points=pi);
  }
}

// -- This script was derived from becher
// -- (c) 2013 Abdreas Urben (urbenan)
// -- GPL license

```


[User]
Okay, I'm working on a design for a bracket, specifically a 'verschraubung' (screw joint) type piece, and I'd like an OpenSCAD file that I can customize.

Here's what I'm envisioning:

The core of the design is based on a rectangular plate. This plate has a defined width, length, and thickness.  A smaller rectangular extrusion runs along the middle of the length of the plate and up the thickness of the plate. Then, we need two of these identical plates and some kind of joining structure. These two plates should be connected by a small pie slice between the two rectangular plates.

Here's the breakdown:

**Base Plate:**
*   It should be a rectangular prism.
*   I need to control its `width`, `length`, and `thickness`.
*   It has a thinner rectangular extrusion centered along the length of one face, going up the thickness.
*   This smaller extrusion should have its own separate `width` and `thickness` parameters.

**Connection of two plates:**
*   I want to generate a mirrored version of this basic plate, in which the mirrored plate is connected to the base plate.
*   The mirrored plate is rotated around the z-axis by a given `angle`.
*   There needs to be a 'pie slice' (a sector of a circle) connecting the bottom edges of the two plates, to provide additional stability. The radius should match the length of the base plates. The sector should match the angle of rotation between the two plates.

**Holes:**
*   Each plate should have two cylindrical through-holes.
*   These holes should be centered on the width of the plate.
*   The holes should be located a given distance from each end of the plate along the length.
*   The diameter of these holes should be controllable.
*   The through-holes should extend a little bit further than the plate's thickness.

**Parameters:**
I need to be able to easily control these values as parameters at the top of the file:
*   `Dicke` (Thickness of base plate)
*   `Dicke2` (Thickness of smaller extrusion on base plate)
*   `Laenge` (Length of the plate)
*   `Breite` (Width of the plate)
*  `Breite2` (Width of smaller extrusion on base plate)
*   `Winkel` (Angle of the second plate)
*   `dScrew` (Diameter of the screw holes)

**Libraries:**
*   I'd like it to be compatible with the `MCAD/2dShapes.scad` library (I see that you use a `pieSlice` in that example file, so it must be compatible with this library).
*   I also want to use the standard `build_plate` module, which I believe is typically in its own directory as `../utils/build_plate.scad`

**Additional considerations:**

*   I don't need to include the `build_plate` module in the final product, just the main bracket design.
*   I'd like to set `$fa=1` and `$fs=0.5` to make the circles nice and smooth.

Could you generate an OpenSCAD file that implements this design with these parameters? I need to make sure that the two mirrored plates are perfectly aligned on the origin.

[Assistant]
Item_Verschraubung20x20.scad:
```
use <../utils/build_plate.scad>
use <MCAD/2dShapes.scad>;

//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);

   //////////////////
  //  Parameters  //
 //////////////////

/* [Global] */
//thickness of side walls and bottom (mm)
Dicke  = 4;
Dicke2  = 1.3;
Laenge = 50;
Breite = 20;
Breite2= 4;
Winkel= 15;
dScrew=5.5;

/* [Hidden] */

//sets openSCAD resolution for nice, round holes
$fa=1;
$fs=0.5;

module Plate() {
	difference() {
		union(){
			cube(size=[Breite,Laenge,Dicke],center=false);
			color("red")
			translate([Breite/2-Breite2/2,0,Dicke])
			cube(size=[Breite2,Laenge,Dicke2],center=false);
			}
		//Bohrlöcher
		translate([Breite/2,10,-1])
		cylinder(h = Dicke+4, r=dScrew/2);
		translate([Breite/2,Laenge-10,-1])
		cylinder(h = Dicke+4, r=dScrew/2);
		}
	}

	translate([0,-Laenge,0])
	union() {
		Plate();
		translate([0,Laenge,0])
		rotate([0,0,Winkel])
		Plate();

		translate([0,Laenge,0])
		linear_extrude(height=Dicke)
		pieSlice(20,0,Winkel);
		}

```


[User]
Okay, I need a customizable knob and crank generator for 3D printing, and I want it to be as flexible as possible. I've been messing with a SCAD file I found online, but it's a bit clunky and hard to understand, so I'd like something cleaner and more parametric, if possible.

Here's what I need it to do:

**Core Functionality:**

*   **Multiple Knob Styles:** I need to be able to generate different styles of knobs, specifically:
    *   **Minimal:** A basic, functional knob for test fitting. Think a simple, chunky cylinder or cube.
    *   **Round:** A traditional round knob with options for customization.
    *   **Crank:** A crank handle with various wheel styles and handle options.

*   **Shaft Compatibility:** The generator needs to be parametric for fitting different sized shafts. I need to input:
    *   **Shaft Diameter (Round):** The diameter of the shaft where it is *not* flattened.
    *   **Shaft Diameter (Flattened):** The diameter of the shaft where it *is* flattened.
    *   **Shaft Penetration Depth:** How far the shaft needs to go into the knob/crank.

*   **Hole Shrinkage Compensation:** This is crucial. My printer always prints holes a little smaller than designed. I need to be able to specify a shrinkage factor as a multiplier. The program should intelligently default this based on the flattened shaft diameter, using 1.10 for shafts less than 6mm, 1.06 for shafts less than 10mm, and 1.02 for other shafts.

*   **Knob Height Options:** I need a way to specify the knob's height, with options:
    *   Preset sizes like "small," "medium," "large," and "xlarge." The program should default these relative to the shaft's diameter and penetration depth, with the defaults as defined in the provided source file.
    *   Custom height input in millimeters.

**Round Knob Customization:**

*   **Optional Stem:** An option to add a stem to the round knob, like a "mushroom" style. This needs a way to specify the stem's height.
*   **Optional Flange:** An option to add a flange at the base of the round knob, and specify its width as a percentage of the knob's radius.
*   **Pointer Options:** I need different pointer types for round knobs, specifically: "none", "vane," "raisedarrow," "teardrop," and "speedboat".
*   **Pointer Angle:** A way to specify the pointer's angle in degrees relative to the flat part of the shaft.
*  **Top Ratio:**  A ratio controlling the top diameter relative to the base diameter of the round knob.
*  **Grooves:**  Optional grooves on the sides of the knob with parameters for depth and angle.

**Crank Customization:**

*   **Crank Shaft Diameter Multiplier:** The outside diameter of the crank's shaft as a multiple of the metal shaft diameter.
*   **Crank Shaft Length:** The length of the crank shaft.
*   **Crank Wheel Diameter Multiplier:** The diameter of the crank's wheel as a multiple of the metal shaft diameter.
*   **Crank Wheel Styles:** Options for the crank wheel: "solid," "daisy4," "daisy6," "spoke4."
*   **Handle Options:** Options for printing a crank handle: "handle," "handleretainer," "retainer," or "none."
*   **Handle Length and Diameter:**  Parameters for specifying the length and diameter of the crank handle.
*   **Crank Bolt Dimensions:** Parameters to specify the diameter of a bolt for attaching the handle and the flat-to-flat width of a corresponding nut.

**Important Considerations:**

*   **Parametric Design:** Everything should be configurable through parameters.
*   **Clear Comments:** The generated SCAD file needs to be well-commented to explain the logic and parameters.
*  **No dependencies other than standard OpenSCAD functions.**

**Example Use Case:**

I need a round knob for a potentiometer. The shaft diameter is 6.02mm where it's round, and 4.47mm where it's flat. The shaft penetration depth is 7mm. I want a medium sized round knob with a 20% flange, a raised arrow pointer at 0 degrees, and some shallow grooves. I also need a crank for a different project, where the shaft diameter is 14.26mm (round) and 12.77mm (flat), penetration of 20mm.

Can you generate a parametric OpenSCAD file to handle all this?

[Assistant]
knob-builder-v2.scad:
```
// Knob builder

// Select style of knob - use minimal for a quick test fit
knob_style = "round"; // [minimal,round,crank]

// Measure shaft diameter (in millimeters) using calipers where it is NOT flattened. Ryobi drill press: 14.26; RepRapDiscount knob: 6.02
shaft_diameter = 6.02;

// Measure shaft diameter (in millimeters) where it IS flattened. Ryobi drill press: 12.77; RepRapDiscount knob: 4.47
shaft_flattened = 4.47;

// Shaft penetration into knob (in millimeters). Measure the height of the stem which is clear of obstacles. Ryobi drill press: 20; RepRapDiscount knob: 7
shaft_penetration = 7;

// Printer hole shrink - nearly all printer / slicer setups will have a multiplier that needs to be applied to the diameter of any hole so it will tightly fit a precisely machined part. 1.02 means 2% is added to hole dimensions to account for shrinking
hole_shrink = shaft_flattened < 6 ? 1.10 : (shaft_flattened < 10 ? 1.06 : 1.02);

// Knob height (ignored for crank); small, medium or large relative to style, custom in mm (advanced)
knob_height = "medium"; //[small,medium,large,xlarge,custom]

// If custom specified, this is the knob height in mm, otherwise this is ignored
knob_height_custom = 0;

/*[round]*/
// For all round knobs, height of stem in mm (0 to disable) (usually needed only if clearance above surface is needed)
round_knob_stem_height = 0;

// If non-zero, the flange width is added to the radius as a percentage of radius
round_knob_flange_width = 0.2; // 0 to disable, 0.6 for a wide flange, 0.2 for a narrow flange

// Pointer type
round_knob_pointer_type = "none"; //[none,vane,raisedarrow,teardrop,speedboat]

// Pointer angle (in degrees) with respect to flat part of shaft
round_knob_pointer_angle = 0; // 0 degrees if flat part is on top, 180 if flat part is on bottom

// Ratio of knob top diameter to knob bottom diameter
round_knob_top_ratio = 0.8;

// Groove depth or 0 for smooth
round_knob_groove_depth = 0.025; // Groove depth as portion of knob width; 0 to disable, max=0.2

round_knob_groove_angle = 6.8; // Groove angle in degrees

/*[crank]*/
// Crank shaft outside diameter as a multiple of metal shaft diameter
crank_shaft_multiplier = 2.2;

// Crank shaft length - keep this short normally, longer shafts put more stress on the crank
crank_shaft_length = 80;

// Crank wheel diameter as a multiple of metal shaft diameter
crank_wheel_multiplier = 7.5;

// Crank wheel type
crank_wheel_type = "spoke4"; //[solid,daisy4,daisy6,spoke4]

// Print handle, handle + retainer, or no handle
crank_print_handle = "handleretainer"; //[handle,handleretainer,retainer,none]

// Crank handle length
crank_handle_length = 90;

// Crank handle diameter
crank_handle_diameter = 20;

// Crank connector bolt shaft diameter - 5 for #6, 5.5 for M4
crank_bolt_diameter = 5;

// Crank connector hex nut flat-to-flat width (7.9mm for #6, 7.2mm for M4)
crank_nut_flat_width = 7.9;

/*[hidden]*/
shaft_length = shaft_penetration;
min_height = min(shaft_diameter, shaft_penetration);
normal_height = max(shaft_diameter, shaft_penetration);

if (knob_height == "small") build_knob( min_height * 1.35 );
if (knob_height == "medium") build_knob( max(18,normal_height * 1.5) );
if (knob_height == "large") build_knob( max(30,normal_height * 2) );
if (knob_height == "xlarge") build_knob( max(50,normal_height * 3) );
if (knob_height == "custom" && knob_height_custom > 0) build_knob( knob_height_custom );

module build_knob( height )
{
  if (knob_style == "minimal") build_minimal_knob( height );
  else if (knob_style == "crank") build_crank( height );
  else if (knob_style == "round" || knob_style == "graduated" || knob_style == "knurled") build_round_knob( height );
  else echo( "Unknown style ", knob_style );
}

module build_minimal_knob( height )
{
  echo( "Building minimal knob with height", height, "shrink factor", hole_shrink );
  difference() {
	create_minimal_knob( height );
   create_shaft();
  }
}

module build_round_knob( height )
{
  echo( "Building ", knob_style, " knob with height", height, " and stem height", round_knob_stem_height, "shrink factor", hole_shrink );
  // If knob has a stem ("mushroom" style) rotate so stem is up
  if (round_knob_stem_height > 0)
  {
	translate([0,0,height+round_knob_stem_height]) rotate([180,0,0])
	difference()
	{
		create_round_knob( height );
		create_shaft();
	}
  }
  else
  difference()
  {
	 create_round_knob( height );
	 create_shaft();
  }
}

module create_round_knob( height )
{
  assign( width = height * 1.5 )
  {
	 echo( "Round knob width", width, " height", height );
	 rotate([0,0,round_knob_pointer_angle+270]) translate([0,0,round_knob_stem_height+height]) create_knob_pointer(width,height);
	 translate([0,0,round_knob_stem_height]) create_grooved_knob(width,height);
	 if (round_knob_stem_height > 0)
	 {
		cylinder( r=shaft_diameter * 1.5 / 2, h=round_knob_stem_height, center=false, $fn = 90 );
	 }
  }
}

module create_knob_pointer( width, height )
{
  if (round_knob_pointer_type == "vane")
  {
   assign(woff = width * 0.6) difference()
	{
		translate([0,-woff,-height]) cube(size=[1,width*1.2,height], center=false);
		translate([0,-woff*1.1,-height/5]) rotate([-6,0,0]) cube(size=[2,width*1.8,height], center=false);
		translate([0,width*0.7,-height]) rotate([5,0,0]) cube(size=[1,width*1.5,height], center=false);
	}
  }
  if (round_knob_pointer_type == "raisedarrow")
  {
		translate([0,-width*1.15/2,-height*0.8]) create_arrow( width * 1.2, width / 6, height );
  }
  // This needs to be an impression...
  if (round_knob_pointer_type == "sunkenarrow")
  {
  }
  if (round_knob_pointer_type == "teardrop")
  {
		translate([0,0,-height*0.8]) create_teardrop( width * 1.2, width / 10, width / 5, height * 0.9 );
  }
  if (round_knob_pointer_type == "speedboat")
  {
		translate([0,0,-height*0.8]) create_speedboat( width * 1.2, width / 8, width / 4, height * 0.9 );
  }
}

module create_teardrop( length, pointwidth, largewidth, height )
{
  hull()
  {
	translate([0,-length/2,0]) cylinder( r1=pointwidth*0.5, r2=pointwidth*0.43, h=height, center=false, $fn = 24 );
	translate([0,length/2,0]) cylinder( r1=largewidth*0.75, r2=largewidth*0.45, h=height, center=false, $fn = 48 );
  }
}

module create_speedboat( length, pointwidth, largewidth, height )
{
  hull()
  {
	translate([0,-length/2,0]) cylinder( r1=pointwidth*0.5, r2=pointwidth*0.43, h=height, center=false, $fn = 24 );
	intersection()
	{
		translate([length*0.5/2,0,0]) cylinder(r1=length/2, r2=length*0.9/2, h=height, center=false, $fn=72);
		translate([-length*0.5/2,0,0]) cylinder(r1=length/2, r2=length*0.9/2, h=height, center=false, $fn=72);
		translate([0,length*0.3/2,0,0]) cylinder(r1=length/2, r2=length*0.9/2, h=height, center=false, $fn=72);
	}
	translate([0,length*0.8/2,0]) cylinder( r=largewidth*1.3/2, h=height, center=false, $fn=72 );
  }
}

module create_arrow( length, width, height )
{
	// Head
	assign( wdiag = sqrt(width*width+width*width) )
   {
   translate([-wdiag/2,0,0]) difference()
	{
		rotate([0,0,-45]) cube(size=[width,width,height], center=false);
		// trim point
		translate([wdiag/2,-wdiag/2,0]) rotate([0,0,120]) cube(size=[width*1.3,width*1.3,height], center=false);
		translate([wdiag/2,-wdiag/2,0]) rotate([0,0,330]) cube(size=[width*1.3,width*1.3,height], center=false);
		//translate([-width/2,wdiag*0.75,0]) cube(size=[width,width,height], center=false);
	}
	// Shaft
	translate([-width*0.75/2,wdiag*0.25,0]) cube(size=[width*0.75,length-width/2,height*0.9], center=false);
	// Tail
	translate([-width/2,(wdiag+height)*1.2,0]) difference()
	{
		cube(size=[width,width,height*0.9], center=false);
		translate([width*1.75/2,0,0]) rotate([0,0,-45]) cube(size=[width,width,height], center=false);
		translate([-width*1.15/2,-width*1.4/2,0]) rotate([0,0,45]) cube(size=[width,width,height], center=false);
		// Rear notch of tail
		translate([-wdiag*0.3/2,wdiag*0.9,0]) rotate([0,0,-45]) cube(size=[width,width,height], center=false);
	}
   }
}

module create_grooved_knob( width, height )
{
  difference()
  {
    cylinder( r1=width/2, r2=width*round_knob_top_ratio/2, h=height, center=false, $fn = 90 );
	 knob_grooves( width, height );
  }
  // Add optional flange. Flange needs to have more pitch than
  // we'd like for stylistic purposes, but a steeper flange pitch
  // makes it easier to manage overhang if we flip the knob over
  if (round_knob_flange_width > 0) assign( flange_base_radius = (width + width * round_knob_flange_width) / 2, flange_base_height = max(1,round_knob_flange_width * 2), flange_height = round_knob_flange_width * width / 4 )
  {
	 cylinder( r = flange_base_radius, h=flange_base_height, $fn = 72, center=false );
	 translate([0,0,flange_base_height]) cylinder( r1 = flange_base_radius, r2 = width / 2, h=flange_height, $fn = 72 );
  }
}

module knob_grooves( width, height )
{
  // Calculate integral number of grooves based on groove depth
  if (round_knob_groove_depth > 0)
  assign( groove_depth = width * round_knob_groove_depth )
  assign( circumf = width * 3.141592653, groove_diameter = groove_depth * 2 )
  assign( int_grooves = floor(circumf / groove_diameter / 3) )
  assign( dpergroove = 360 / int_grooves )
  for (d = [1 : int_grooves])
  {
	//echo( "Groove ", d, "/", int_grooves, " deg=", (d-1) * dpergroove );
	rotate([0,0,(d-1)*dpergroove]) rotate([0,-round_knob_groove_angle,0]) translate([width/2,0,0]) cylinder(h=height, r=groove_depth, center=false, $fn = 24 );
  }
}

module build_crank( height )
{
  assign( crank_shaft_diameter = shaft_diameter * crank_shaft_multiplier, crank_wheel_diameter = shaft_diameter * crank_wheel_multiplier )
  {
    echo( "Building crank shaft diameter", crank_shaft_diameter, " shaft length", crank_shaft_length, " wheel diameter", crank_wheel_diameter );
    translate([0,0,crank_shaft_length + shaft_diameter]) rotate([180,0,0]) difference()
    {
		create_crank_shaft( crank_shaft_diameter, crank_wheel_diameter );
	   create_shaft();
    }
	 // Optional piece: handle
	 if (crank_print_handle == "handle" || crank_print_handle == "handleretainer")
	 {
		translate( [crank_wheel_diameter * 0.45, crank_wheel_diameter * 0.45, 0] ) create_crank_handle();
	 }
	 // Optional piece: handle retainer
	 if (crank_print_handle == "retainer" || crank_print_handle == "handleretainer")
	 {
		translate( [crank_wheel_diameter * -0.42, crank_wheel_diameter * 0.42, 0] ) create_crank_handle_retainer();
	 }
  }
}

module create_crank_shaft(crank_shaft_diameter, crank_wheel_diameter)
{
  union()
  {
    cylinder( r = crank_shaft_diameter / 2, h = crank_shaft_length, center = false, $fn = 45 );
	 translate([0,0,crank_shaft_length]) create_crank_wheel( crank_shaft_diameter, crank_wheel_diameter );
  }
}

module create_crank_wheel( crank_shaft_diameter, crank_wheel_diameter )
{
  assign( center_ring_inside_diameter = crank_shaft_diameter * 1.4, center_ring_outside_diameter = crank_wheel_diameter - crank_bolt_diameter * 6) assign( center_ring_width = (center_ring_outside_diameter - center_ring_inside_diameter) / 2 ) union()
  {
	 difference()
	 {
		cylinder( r = crank_wheel_diameter / 2, h = shaft_diameter, center = false, $fn = 90 );
	   translate([crank_wheel_diameter / 2 - crank_bolt_diameter * 1.75, 0, 0]) cylinder( r = (crank_bolt_diameter * hole_shrink) / 2, h = shaft_diameter, center = false, $fn = 72 );
		// Remove center ring for daisy spoked wheels
		if (crank_wheel_type == "daisy4" || crank_wheel_type == "daisy6")
		difference()
		{
			echo( "Crank wheel ", crank_wheel_type, " center ring ID=", center_ring_inside_diameter, " center ring OD=", center_ring_outside_diameter );
			cylinder( r = center_ring_outside_diameter/2, h = shaft_diameter, center = false, $fn = 90 );
			cylinder( r = center_ring_inside_diameter/2, h = shaft_diameter, center = false, $fn = 90 );
		}
	   // Remove cutouts for spoked wheel
		if (crank_wheel_type == "spoke4")
		difference()
		{
			cylinder( r = center_ring_outside_diameter / 2, h = shaft_diameter, center = false, $fn = 90 );
			cube( size=[center_ring_outside_diameter, shaft_diameter, shaft_diameter * 2], center = true );
			cube( size=[shaft_diameter, center_ring_outside_diameter, shaft_diameter * 2], center = true );
		}
	 } // Solid wheel minus bolt hole
	 // Add daisy spokes
	 if (crank_wheel_type == "daisy4" || crank_wheel_type == "daisy6")
	 assign( center_ring_avg_radius = (center_ring_outside_diameter + center_ring_inside_diameter) / 4 )
	 {
		translate([center_ring_avg_radius,0,0]) daisy( center_ring_width );
		translate([-center_ring_avg_radius,0,0]) daisy( center_ring_width );
		if (crank_wheel_type == "daisy4")
		{
			translate([0,center_ring_avg_radius,0]) daisy( center_ring_width );
			translate([0,-center_ring_avg_radius,0]) daisy( center_ring_width );
		}
		else
		assign( xoff = center_ring_avg_radius * cos(60), yoff = center_ring_avg_radius * sin(60) )
		{
			translate([xoff,yoff,0]) daisy( center_ring_width );
			translate([-xoff,yoff,0]) daisy( center_ring_width );
			translate([xoff,-yoff,0]) daisy( center_ring_width );
			translate([-xoff,-yoff,0]) daisy( center_ring_width );
		}
	 }
	 // Add hub for normal spokes
	 if (crank_wheel_type == "spoke4")
	 {
		cylinder( r = crank_shaft_diameter * 1.2 / 2, h = shaft_diameter, center=false, $fn = 90 );
	 }
  } // Adding back in spokes, etc
}

module daisy( daisy_width )
{
	difference()
	{
		cylinder( r = daisy_width * 1.18 / 2, h = shaft_diameter, center=false, $fn = 90 );
		cylinder( r = daisy_width * 0.52 / 2, h = shaft_diameter, center=false, $fn = 90 );
	}
}

module create_crank_handle()
{
  difference()
  {
  union()
  {
	 difference()
	 {
	   cylinder( r = crank_handle_diameter / 2, h = crank_handle_length, center = false, $fn = 72 );
		cylinder( r = crank_handle_diameter * 0.75 / 2, h = crank_handle_length, center = false, $fn = 72 );
	 } // hollow cylinder
	 // Add solid bottom
	 cylinder( r = crank_handle_diameter / 2, h = crank_handle_diameter / 2, center = false, $fn = 72 );
	/* Not sure why I thought this was necessary...
	 translate([0,0,crank_handle_diameter * 0.75 / 2]) difference()
	 {
		sphere( r = crank_handle_diameter * 0.75 / 2, $fn = 50 );
	   translate([0,0,crank_handle_diameter * 0.75 /2]) cube( size = crank_handle_diameter, center = true );
	 } // hemisphere (bottom half of sphere)
	*/
  } // hollow cylinder with hemisphere set in bottom
  // Create beveled cut out with generous clearance for crank handle retainer
  cylinder( r1 = crank_handle_diameter / 2 * 0.56, r2 = crank_handle_diameter / 2 * 0.75, h = crank_handle_diameter / 2, center = false, $fn = 72 );
  } // difference
}

module create_crank_handle_retainer()
{
  assign( leg = crank_nut_flat_width * tan(60), outdiameter = crank_nut_flat_width / 2 / cos(60) )
  difference()
  {
	 cylinder( r1 = /*outdiameter * 1.2 / 2*/ crank_handle_diameter * 0.50 / 2, r2 = crank_handle_diameter * 0.69 / 2, h = crank_handle_diameter / 2, center = false, $fn = 72 );
	 translate([0,0,7]) cylinder( r = outdiameter * 1.3, h = crank_handle_diameter, center = false, $fn = 72 );
    translate([0,0,5]) hexnut( crank_nut_flat_width, 2 );
	 cylinder( r = crank_bolt_diameter * hole_shrink / 2, h = crank_handle_diameter, center = false, $fn = 72 );
  }
}

// Create knob using specified height guideline
// with base centered at z offset 0
module create_minimal_knob( height )
{
  assign( cube_size_w = max(shaft_diameter * 1.5, height * 1.25), cube_size_h = height * 1.25 )
  {
	 echo( "Minimal cube_size", cube_size_w, "x", cube_size_h );
	 translate([0,0,cube_size_h*1.01/2]) cube(size=[cube_size_w, cube_size_w, cube_size_h], center=true);
  }
}

module create_shaft()
{
  assign(shaft_top = shaft_diameter * 0.1, shaft_radius = shaft_diameter / 2, dome_r = cos(60) * shaft_diameter * 0.1, dome_offset = sin(60) * shaft_diameter * 0.1) difference() {
   union() {
    // Create the actual shaft, padded to accommodate hole shrinkage
    cylinder( r=(shaft_diameter * hole_shrink) / 2, h=shaft_length, center=false, $fn = 90 );
    // Create a tapered cap to avoid bridging
    translate([0,0,shaft_length]) cylinder( r1=(shaft_diameter * hole_shrink)/2, r2=shaft_top, h=3, $fn = 90 );
	 // Dome the top of the cap to further avoid bridging
	 translate([0,0,shaft_length+3-dome_offset * shaft_top / dome_r]) sphere( r=shaft_top * shaft_top / dome_r, $fn = 40 );
   }
   // Chop off part of the shaft to create the flattened part
   translate( [shaft_flattened * hole_shrink, 0, shaft_length/2] ) cube( size = [shaft_diameter * hole_shrink, shaft_diameter * hole_shrink, shaft_length], center=true );
  }
}

// Create a hex nut (trap) with specified flat-to-flat width
module hexnut( width, height )
{
  // width is the in-diameter of the hexagon
  // in-diameter * tan(60) = leg length
  // out-diameter = width / cos(60)
  assign( leg = width / tan(60), outdiameter = width / 2 / cos(60) )
  {
	echo( "hexnut leg=", leg, ", width=", width, ", outdiameter=", outdiameter, ", height=", height );
   scale([hole_shrink,hole_shrink,1]) polyhedron(
	  points = [
		[0,0,0], [leg,0,0], [leg/2,width/2,0], [-leg/2,width/2,0], [-leg,0,0], [-leg/2,-width/2,0], [leg/2,-width/2,0], // 0-6
	   [0,0,height], [leg,0,height], [leg/2,width/2,height], [-leg/2,width/2,height], [-leg,0,height], [-leg/2,-width/2,height], [leg/2,-width/2,height] // 7-13
	  ],
	  triangles = [
		[0,2,1], [1,2,9], [1,9,8], [8,9,7],
		[0,3,2], [2,3,10], [2,10,9], [9,10,7],
		[0,4,3], [3,4,11], [3,11,10], [10,11,7],
		[0,5,4], [4,5,12], [4,12,11], [11,12,7],
		[0,6,5], [5,6,13], [5,13,12], [12,13,7],
		[0,1,6], [6,1,8], [6,8,13], [13,8,7]
	  ]
   );
  }
}

```


[User]
Okay, I've been playing around with OpenSCAD and I've got this script that makes a basic rectangular plate with rounded corners, which I've attached. I'm planning on using it to generate faceplates and enclosure parts. I want to make this even more useful and flexible, and I'm hoping you can help me develop a more comprehensive version.

Here’s what I’m looking for:

1.  **Multiple Corner Types:** Instead of just rounded corners, I'd like to be able to choose between rounded, chamfered, or square corners (no modification). I need a parameter to select the corner type, and if I select chamfered, I need to specify the size of the chamfer.

2. **Hole/Cutout Support**: I need to be able to easily add rectangular or circular holes anywhere on the plate. These should be defined by their position (x, y), size (width and height for rectangles, radius for circles) and be able to easily specify multiple such cutouts.

3.  **Mounting Holes**: I also need the ability to add mounting holes.  I'd like to be able to specify the number of holes to create (say, along the perimeter), their diameter, and their position relative to the edge (an offset from the edge). The positions should be automatically calculated, evenly spaced either on the perimeter, or if I select, evenly spaced along some part of the perimeter.

4.  **Extrusion Feature Support**: I would like to also be able to create simple rectangular extrusions on either side of the plate. I will need to specify their thickness, their x, y position, and their width and height. I would like to be able to specify multiple extrusions.

5.  **Parameter Based Design**: It would be good to be able to control all of this through parameters.

6.  **Usable With `use`**: I'd like to be able to use the module in other OpenSCAD scripts using the `use <filename>` statement.

Essentially, I want a modular script that I can use to create a base plate, then add rounded or chamfered corners, specify mounting holes and cutouts, and even basic extrusions to help with mounting components. I'm not looking for a fully developed CAD program, just something that provides me with a basic plate building block.

I’m comfortable using parameters to control everything, and it would be nice if the code were well-commented so I can understand how it's working. I think the approach I had was a good start, but I need some more advanced features to make it more generally useful. I'm not concerned about using any special libraries at this time, I'd prefer to keep it as vanilla OpenSCAD as possible for now.

[Assistant]
parametric_rounded_corner_plate.scad:
```

size_x=100;
size_y=50;
size_z=1;
corner_radius=5;
corner_faces=32;

module plate (sizeX, sizeY, sizeZ, cornerRadius, cornerFaces)
{
	union()
	{
		difference()
		{
			cube([sizeX,sizeY,sizeZ]);
			cube([cornerRadius,cornerRadius,	sizeZ+1]);
			translate([sizeX-cornerRadius,0,0]) cube([cornerRadius,cornerRadius,sizeZ+1]);
			translate([0,sizeY-cornerRadius,0]) cube([cornerRadius,cornerRadius,sizeZ+1]);
			translate([sizeX-cornerRadius,sizeY-cornerRadius,0]) cube([cornerRadius,cornerRadius,sizeZ+1]);
		}
		translate([cornerRadius,cornerRadius,0]) cylinder(r=cornerRadius,h=sizeZ, $fn=cornerFaces);
		translate([sizeX-cornerRadius,cornerRadius,0]) cylinder(r=cornerRadius,h=sizeZ, $fn=cornerFaces);
		translate([cornerRadius,sizeY-cornerRadius,0]) cylinder(r=cornerRadius,h=sizeZ, $fn=cornerFaces);
		translate([sizeX-cornerRadius,sizeY-cornerRadius,0]) cylinder(r=cornerRadius,h=sizeZ, $fn=cornerFaces);
	}
}

plate (size_x, size_y, size_z, corner_radius, corner_faces);

```


[User]
Okay, I'd like to design a faceplate for a 16x2 character LCD, specifically the kind using an HD44780 controller. I've found a design online that I really like, and I'd like to create something similar, but with the ability to adjust the dimensions parametrically in OpenSCAD.

Here's what I need:

*   **Base Plate:** The faceplate should have a rectangular base, with rounded corners. I need to be able to specify the overall `size_x`, `size_y`, and `size_z` (thickness) of this base. I also need to be able to set the `corner_radius` and `$fn` (number of facets for the rounded corners)
*   **Display Cutout:** There needs to be a rectangular cutout in the base plate to accommodate the LCD screen. I need to be able to control the cutout's `offset_x` and `offset_y` from the base plate's origin, and its overall `size_x`, and `size_y` and its corners, with its own `cutout_corner_radius` and `cutout_corner_faces` values.
*   **Rim:** The faceplate should have a raised rim around the edge. This should be controllable via a `rim_height` parameter. I also want to be able to turn off the rim by setting the height to 0. The rim should have the same rounded corners as the base.
*   **Mounting Posts:** There should be four cylindrical mounting posts to hold the LCD in place. These posts need to be positioned so they line up with the mounting holes on standard HD44780 LCDs. These posts also need to have a small lip or step to allow an M3 screw to sit nicely in the post.
*   **Parametric Control:** I want to adjust all of these dimensions parametrically in OpenSCAD, which means being able to adjust all of the variables listed above.

I've seen in the example that some values for positions of the posts are calculated from the overall size and I'm okay with that for the moment.

The mounting posts should be designed to work with M3 screws, though screws of similar diameter should also work as well.

Finally, I would like this to be a single file, and I'm okay if you decide to create functions for each type of element.

Could you generate an OpenSCAD file that does this? Please use comments in the code to make things easier to understand. I'm not using any external libraries here, so there should be no dependency requirements.

[Assistant]
parametric_alphanumeric_display_faceplate.scad:
```
//base plate
size_x=100;
size_y=50;
size_z=1;
corner_radius=5;
corner_faces=32;

//cutout
cutout_corner_radius=2;
cutout_corner_faces=32;
offset_x=10;
offset_y=8;

//rim
rim_height=10;

module plate (sizeX, sizeY, sizeZ, cornerRadius, cornerFaces)
{
	union()
	{
		difference()
		{
			cube([sizeX,sizeY,sizeZ]);
			cube([cornerRadius,cornerRadius,	sizeZ+1]);
			translate([sizeX-cornerRadius,0,0]) cube([cornerRadius,cornerRadius,sizeZ+1]);
			translate([0,sizeY-cornerRadius,0]) cube([cornerRadius,cornerRadius,sizeZ+1]);
			translate([sizeX-cornerRadius,sizeY-cornerRadius,0]) cube([cornerRadius,cornerRadius,sizeZ+1]);
		}
		translate([cornerRadius,cornerRadius,0]) cylinder(r=cornerRadius,h=sizeZ, $fn=cornerFaces);
		translate([sizeX-cornerRadius,cornerRadius,0]) cylinder(r=cornerRadius,h=sizeZ, $fn=cornerFaces);
		translate([cornerRadius,sizeY-cornerRadius,0]) cylinder(r=cornerRadius,h=sizeZ, $fn=cornerFaces);
		translate([sizeX-cornerRadius,sizeY-cornerRadius,0]) cylinder(r=cornerRadius,h=sizeZ, $fn=cornerFaces);
	}
}

module posts()
{

	union()
	{
		difference()
		{
			translate([0+2.775,0+2.6,size_z]) cylinder(r1=6/2, r2=5/2,h=7, $fn=32);
			translate([0+2.775,0+2.6,size_z]) cylinder(r=3/2,h=7.5, $fn=16);
		}
		difference()
		{
			translate([0+2.775,31+2.6,size_z]) cylinder(r1=6/2, r2=5/2,h=7, $fn=32);
			translate([0+2.775,31+2.6,size_z]) cylinder(r=3/2,h=7.5, $fn=16);
		}

		difference()
		{
			translate([74.60+2.775,0+2.6,size_z]) cylinder(r1=6/2, r2=5/2,h=7, $fn=32);
			translate([74.60+2.775,0+2.6,size_z]) cylinder(r=3/2,h=7.5, $fn=16);
		}

		difference()
		{
			translate([74.60+2.775,31+2.6,size_z]) cylinder(r1=6/2, r2=5/2,h=7, $fn=32);
			translate([74.60+2.775,31+2.6,size_z]) cylinder(r=3/2,h=7.5, $fn=16);
		}
	}
}

difference()
{
plate (size_x, size_y,rim_height, corner_radius, corner_faces);
translate([size_z,size_z,0])
plate (size_x-(2*size_z), size_y-(2*size_z),rim_height, corner_radius-size_z, corner_faces);
}

union()
{
difference()
{
//base plate
plate (size_x, size_y, size_z, corner_radius, corner_faces);

//display cutout
translate([7.75+offset_x,8.8+offset_y,0])
plate(64.5,15.9,10,cutout_corner_radius,cutout_corner_faces);

}
translate([offset_x,offset_y,0])
posts();
}

```


[User]
Okay, I'd like to design a parametric text display object for OpenSCAD. I want it to be able to show text strings that can be set as parameters, and also control the font height and thickness of the text. I've seen some existing work using the `write()` function from the Write.scad library to do this, but I would like to make it a bit more configurable and reusable.

Here's what I'm looking for:

1.  **Text Input:** The user should be able to input a string as a parameter to be displayed.
2.  **Height Control:** There should be a parameter to control the height of the text.
3.  **Thickness Control:** There should be a parameter to control the thickness of the text.
4.  **Horizontal Centering:** The text should be horizontally centered within a bounding box. The bounding box isn't part of the design, it's just a constraint for alignment of the text.
5.  **Font Selection:** The user should be able to choose which font is used. I’m not very particular about which fonts, but it would be great to have a few options to select from. I'm thinking, at least, `Liberation Sans`, `Helvetica`, and `Arial` if that’s possible, but happy to just have a single default if that’s easier.

I'd prefer that the code be as clean and well-structured as possible. The output should be a single OpenSCAD module that can be used in other designs. It should probably be able to use the `write` module from the `Write.scad` library (though, if you have other ideas that’d work as well, I’m happy to hear them).

Can you help me generate that OpenSCAD code?

[Assistant]
versioncheck.scad:
```
// Dummy
DUMMY = 0;

function versionstring() = str(version()[0], ".", str(version()[1]), version()[2] == undef ? "" : str(".", version()[2]));

use <write/Write.scad>
write(versionstring(),t=3,h=5,center=true);

```


[User]
Okay, I'd like to request a design for a layered candle holder, like the one I've tried to create in the attached file. I'm aiming for something that can hold an LED tea light, but with the design being easily adjustable for different sizes.

Here's a breakdown of the features I'm looking for and how they should be parametric:

*   **Layered Structure:** The holder should be composed of multiple identical layers stacked on top of each other.
*   **Layer Shape:** Each layer should consist of four cylindrical "legs" joined at the corners by spheres, forming a sort of open box shape in the horizontal plane. These "legs" should all have the same radius, and each leg should be oriented horizontally and touch exactly two corner spheres.
*   **Layer Overlap:** There should be a vertical overlap between each successive layer, creating a more solid overall structure.  This should be adjustable by a percentage that scales with the radius of each leg, with a default of 10%.
*   **Hole in Center:**  The holder should have a cylindrical hole running vertically through the center of all layers to accommodate a candle or tea light. This hole should be centered horizontally on the combined structure.
*   **Parameters:** I'd like to be able to control these aspects through parameters:
    *   `radius`: The radius of the cylindrical legs and spheres (default 3.5).
    *   `length`: The length of the cylindrical legs (default 75).
    *   `layers`: The number of layers in the holder (default 14).
    *   `resolution`: The resolution for the cylinders and spheres (default 50). This is really `$fn` for primitives.
    *   `overlap_percent`: The percentage of the radius by which each layer vertically overlaps the one below it, with a range between 0.0 and 1.0 (default 0.1). I'm calculating the overlap as `2 - overlap_percent*2`, but a direct percentage of the radius would work as well.
    *   `hole_percent`: The diameter of the central hole as a percentage of `length`, with a range between 0.0 and 1.0 (default 0.9).

I'm new to using OpenSCAD parameters, so having the parameters clearly defined and easy to modify would be very helpful.

I do not require any specific libraries for this project.

I'm eager to see your design and test print it! Thanks in advance for your help.

[Assistant]
layered_candle_holder.scad:
```
//Radius of each layer
radius = 3.5;
//Length of the side
length = 75;
//Number of layers
layers = 14;
//Resolution of primatives (cylinders and spheres)
resolution = 50;
//How much should each layer overlap
overlap_percent = .1; //min/max:[0.0:1.0]
overlap = 2 - overlap_percent*2;
//How big is the hole compared to the length
hole_percent = 0.9; //min/max:[0.0:1.0]

difference()
{
	union(){
		for ( i = [0 : layers - 1] )
		{
			translate([0,0,i*overlap*radius])
			{
				union()
				{
					translate([-length/2,-length/2,radius])
					{
						rotate([0,90,0],$fn=resolution)
							cylinder(h=length,r=radius);
						rotate([-90,0,0],$fn=resolution)
							cylinder(h=length,r=radius);
						sphere(r=radius,$fn=resolution);
					}
					translate([length/2,length/2,radius])
					{
						rotate([0,-90,0],$fn=resolution)
							cylinder(h=length,r=radius);
						rotate([90,0,0],$fn=resolution)
							cylinder(h=length,r=radius);
						sphere(r=radius,$fn=resolution);
					}
					translate([length/2,-length/2,radius])
						sphere(r=radius,$fn=resolution);
					translate([-length/2,length/2,radius])
						sphere(r=radius,$fn=resolution);
				}
			}
		}
		translate([0,0,((layers-1)*overlap*radius+2*radius)/2])
			cube(size=[length,length,(layers-1)*overlap*radius+2*radius], center=true);
	}
	translate([0,0,layers*2*radius/2+2*overlap*radius])
		cylinder(h=layers*2*radius, r=hole_percent*length/2, $fn=resolution, center=true);
}
```


[User]
Okay, I'd like to design a pendant based on the Clayr sigil from Garth Nix's *Abhorsen* series, and I need help creating an OpenSCAD file for it.

Here's the basic idea: it's a circular pendant with several star-like points radiating outwards, and key-like shapes interspersed between those points. It also needs a loop at the top for a necklace chain. Importantly, I want the design to be parametric so I can adjust things like the size, number of points, and so on. I'd also like to include a mold design, split into two or three parts for easy casting. I'm aiming for a design that will work for casting in metal.

Here are the specific parameters I want to be able to control:

**Overall Shape & Size:**

*   **`torusRingDiameter`**: The diameter of the circular rings that make up the central part of the pendant, specifically at the model center. This affects the overall size of the center. I want this to scale other elements of the design, when reasonable.
*   **`torusRingThickness`**:  The thickness of those central rings.

**Star Points:**

*   **`starPoints`**: The number of star-like points radiating outwards.
*   **`starRadius`**: How far out these star points extend from the center.
*   **`starSpreadHeight`**: The height of the star points at their base (along the z-axis).
*   **`starSpreadWidth`**: The width of the star points at their base (along the x-axis).

**Key Shapes:**

*   **`keys`**:  The number of key-like shapes between the star points.
*   **`keyRadius`**:  How far out the key shapes extend from the center.
*   **`keyRodRadius`**: The radius of the cylinder that makes up the main part of the key's length.
*   **`keyBitOffset`**: This controls the offset of the key tip, specifically a small horizontal offset at the end of the key.
*   **`keyBitOffsetLength`**: This controls how long that offset is.
*   **`keyBitWidth`**:  The width of the key bit at the very end.
*   **`keyBitLength`**: The overall length of the key bit.

**Hanging Loop:**

*   **`ringOuterRadius`**:  The outer radius of the cylinder that forms the hanging loop at the top of the pendant.
*   **`ringThickness`**: The thickness of the material that makes up the loop, for calculating the hole.

**Casting Mold:**

*   **`pourwayBigR`**:  The radius of the pouring hole at the entrance of the mold.
*  **`pourwayLittleR`**: The radius of the pouring hole where it meets the pendant.
*   **`moldShape`**:  Allows the user to select the mold shape: "cube" (a square-ish box), "cylinder" (a cylindrical shape), or "projection" (based on the shape of the pendant itself).
*   **`funnelHeight`**: How tall the funnel part should be.
*   **`funnelTopRadius`**: The radius of the funnel at its top.
*   **`moldHoleRadius`**: The radius of the hole in the mold itself (should be equal to `pourwayBigR` and `pourwayLittleR`).

**Other:**
* I'd like to include `$fn` to control the fineness of the curves. It should default to 30, but the user should be able to change it.
* I would also like a single variable to track if we've been asked to make half of the pendant only, called `printHalf`.
* I would like a variable to track if we are making a mold `makeMold`.
* I would like a variable to track if we are making the hole in the mold for the pouring material `makeMoldHole`.
* I would like a variable for the width of the ring, called `ringWidth`, set to the starSpreadWidth by default.

**Specific Requests:**
*   The design needs to have modules for each of the basic parts.
*   Specifically, a `torus` module that takes two radius variables to make a torus.
*   Specifically, a `middle` module for the central section, that should also be capable of removing the central "cutouts".
*   Specifically, a `middle_rings` module for the central section, that builds the central "cutout" sections, rather than removes them.
*   Specifically, a `star_point` module which makes a single star point, using `radius`, `baseheight`, and `basewidth` as variables.
*   Specifically, a `key` module, which takes `radius`, `rodRadius`, `bitOffset`, `bitOffsetLength`, `keyBitWidth`, and `keyBitLength` as variables, and uses all of them to build the shape of the key.
*   The key shapes need to be mirrored on the opposite side if they fall on that side, which is calculated.
*   The pouring hole in the mold needs to be a truncated cone.
*   The "projection" mold should use the `projection()` function to generate a 2D slice of the pendant, which is then extruded and scaled.
*   The mold should be split into two or three parts: one that contains the pendant void, one that covers the void and is used as part of the pouring system, and optionally one funnel part.
*   I want to be able to easily select the output part by choosing a string value like "pendant", "halfPendant", "mold1", "mold2", or "mold3".

I think that's everything. I'm mainly concerned with getting the OpenSCAD file set up so I can start tweaking the parameters and print the design. The projection mold should be efficient and minimize rendering resources.

I'm not asking you to provide any external files, but I do use the built-in OpenSCAD library so you do not need to include those.

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

/* [Global] */

// Which one would you like to see?
part = "pendant"; // [pendant:Pendant,halfPendant:Half Pendant,mold1:Mold side 1 (no hole),mold2:Mold side 2 (has hole),mold3:Mold part 3 (funnel)]

/* [Key loops] */
// The diameter of the rings on the key handle (at the center of the model) in mm.  This makes the center as a whole bigger or smaller.  By default a lot of things scale with this.
torusRingDiameter=10; //[0:40]

//How thick are the rings on the key handle?  This makes the center thinner or thicker.
torusRingThickness=2; //[0:10]

/* [Star points] */
//How many star points should the pendant have?
starPoints=7; //[0:10]

//This controlls how long the star points are.  That is, how far out fron the center they go
starRadius=25.4; //[0:200]

//How tall (z-axis) are the points at their bases?
starSpreadHeight=2; //[0:10]

//How wide (x-axis) are the star points at their base?
starSpreadWidth=5; //[0:10]

/* [Keys] */
//How many key blades do we display?
keys=4; //[0:8]

// How far out from the center should the keys extend?
keyRadius=25.4; //[0:200]

//What is the radius of the cylinder which makes up the majority of the length from the center to the tip of the key?
keyRodRadius=1; //[0:10]

//Just play with it. manipulates key tip
keyBitOffset=1.5; //[0:10]

//Play with it. manipulates key tip
keyBitOffsetLength=2; //[0:10]

//Play with it. manipulates key tip
keyBitWidth=1.5; //[0:10]

//Play with it. manipulates key tip
keyBitLength=4; //[0:10]

/* [Hanging loop] */
//Whats the outer radius of the cylinder put through the uppermost star point so this can be hung on a necklace?
ringOuterRadius=2; //[0:10]

//How thick is that part?
ringThickness=2; //[0:10]

/* [Casting] */

// controls the radius of the hole for pouring in casting material.  The first number is the radius at the entrance, the second the size where the hole meets the pendant.
pourwayBigR=3; //[0:10]
pourwayLittleR=2; //[0:10]

//What shape would you like the final mold to be?  Cube may be easier to work with; cylinder could print faster
moldShape="cube"; //[cube:Square/cube,cylinder:Round/Cylindrical,projection:Projection]

//How tall should the funnel part be?
funnelHeight=10; //[0:40]

//Controls the radius at the top of the funnel.  The bottom is automatically set to match the ourway size
funnelTopRadius=30; //[0:100]

/* [Hidden] */
moldHoleRadius=[pourwayBigR,pourwayLittleR];

//Regulates the fineness of all the round parts.  Higher is more detail and more rendering time.
$fn=30; //[10:100]

//variable to track what we've been asked to do
printHalf=(part=="halfPendant");
makeMold=(part=="mold1" || part=="mold2" || part=="mold3");
makeMoldHole=(part=="mold2");

//And how wide? Adjust to make sure the entire point is cut
ringWidth=starSpreadWidth; //[0:10]

module torus(r1, r2){
	rotate_extrude() {
		translate([r1/2,0,0]) {
			circle(r=r2);
		}
	}
}

module middle(r1, r2){
	linear_extrude(height=2*r2,center=true) {
		difference() {
			square([r1+r2,r1+r2],center=true);
			translate([r1/2,r1/2,0]) circle(r=r1/2);
			rotate([0,0,90]) translate([r1/2,r1/2,0]) circle(r=r1/2);
			rotate([0,0,180]) translate([r1/2,r1/2,0]) circle(r=r1/2);
			rotate([0,0,270]) translate([r1/2,r1/2,0]) circle(r=r1/2);
		}
	}
}

module middle_rings(r1, r2){
	linear_extrude(height=2*r2,center=true) {
		union() {
			square([r1+r2,r1+r2],center=true);
			translate([r1/2,r1/2,0]) circle(r=r1/2);
			rotate([0,0,90]) translate([r1/2,r1/2,0]) circle(r=r1/2);
			rotate([0,0,180]) translate([r1/2,r1/2,0]) circle(r=r1/2);
			rotate([0,0,270]) translate([r1/2,r1/2,0]) circle(r=r1/2);
		}
	}
}

//BaseWidth is a slight misnomer.  its the distance from the center of the base to each point on the base.
module star_point(radius,baseheight,basewidth) {
	polyhedron(
		points=[ [0,0,baseheight],[0,-basewidth,0],[0,0,-baseheight],[0,basewidth,0], // the four points at base
			[radius,0,0]  ],                                 // the apex point
		triangles=[ [0,1,4],[1,2,4],[2,3,4],[3,0,4],          // each triangle side
			[1,0,3],[2,1,3] ]                         // two triangles for square base
 );
}

module key(radius, rodRadius, bitOffset, bitOffsetLength, keyBitWidth, keyBitLength) {
	rotate([0,90,0]) union() {
		cylinder(h=radius, r=rodRadius);
		translate([-rodRadius/2,0,radius-bitOffsetLength-(keyBitLength-bitOffsetLength)/2]) cube([rodRadius, bitOffset,bitOffsetLength]);
		translate([-rodRadius/2,bitOffset,radius-keyBitLength]) cube([rodRadius,keyBitWidth, keyBitLength]);
	}
}

module pendant() {
	union() {
		translate([torusRingDiameter/2,torusRingDiameter/2,0]) torus(torusRingDiameter,torusRingThickness);
		translate([torusRingDiameter/2,-torusRingDiameter/2,0]) torus(torusRingDiameter,torusRingThickness);
		translate([-torusRingDiameter/2,torusRingDiameter/2,0]) torus(torusRingDiameter,torusRingThickness);
		translate([-torusRingDiameter/2,-torusRingDiameter/2,0]) torus(torusRingDiameter,torusRingThickness);

		middle(torusRingDiameter,torusRingThickness);

		difference(){
			union() {
				for(i = [0:360/starPoints : 360]) {
					rotate([0,0,i]) translate([torusRingDiameter/2,0,0]) star_point(starRadius,starSpreadHeight,starSpreadWidth);
				}

				//keyblades
				for(i=[0: keys-1]) {
					if ((((2*i)+0.5)*(360/starPoints))<180) {
						rotate([0,0,(((2*i)+0.5)*(360/starPoints))]) key(keyRadius,keyRodRadius,keyBitOffset,keyBitOffsetLength,keyBitWidth,keyBitLength);
					} else {
						mirror([0,1,0]) rotate([0,0,360-(((2*i)+0.5)*(360/starPoints))]) key(keyRadius,keyRodRadius,keyBitOffset,keyBitOffsetLength,keyBitWidth,keyBitLength);
					}
				}

				//reinforcement for the hanging ring
				translate([(torusRingDiameter/2)+(2/3)*starRadius,0,0]) rotate([90,0,0]) cylinder(r=ringOuterRadius,h=ringWidth,center=true);
			}

			middle_rings(torusRingDiameter,torusRingThickness);

			//And finally, hole for hanging the pendant by
			translate([(torusRingDiameter/2)+(2/3)*starRadius,0,0]) rotate([90,0,0]) # cylinder(r=ringOuterRadius-ringThickness,h=ringWidth+0.1,center=true);
		}
	}

	if (printHalf) {
		translate([-(keyRadius+torusRingDiameter),-(keyRadius+torusRingDiameter),-2*torusRingThickness]) #cube([2*keyRadius+2*torusRingDiameter,2*keyRadius+2*torusRingDiameter,2*torusRingThickness]);
	}
}

//key(keyRadius,keyRodRadius,keyBitOffset,keyBitOffsetLength,keyBitWidth,keyBitLength);

difference() {
	if (makeMold) {
		if (moldShape=="cube") {
			if(part!="mold3") {
				translate([-(keyRadius+torusRingDiameter),-(keyRadius+torusRingDiameter),-2*torusRingThickness]) cube([2*keyRadius+2*torusRingDiameter,2*keyRadius+2*torusRingDiameter,2*torusRingThickness]);
			} else {
				translate([-(keyRadius+torusRingDiameter),-(keyRadius+torusRingDiameter),0]) cube([2*keyRadius+2*torusRingDiameter,2*keyRadius+2*torusRingDiameter,funnelHeight]);
			}
		}
		if (moldShape=="cylinder") {
			if (part!="mold3") {
				union() {
					translate([0,0,-1.2*torusRingThickness]) cylinder(r=keyRadius+torusRingDiameter, h=1.2*torusRingThickness);
					translate([keyRadius+torusRingDiameter-torusRingThickness,-torusRingThickness,-1.2*torusRingThickness]) cube([2*torusRingThickness,2*torusRingThickness, 1.2*torusRingThickness]); //a "key" to help align the molds
				}
			} else {
				cylinder(r=keyRadius+torusRingDiameter, h=funnelHeight);
			}
		}
		if (moldShape=="projection") {
			if (part!="mold3") {
				translate([0,0,-1.2*torusRingThickness]) linear_extrude(height=1.2*torusRingThickness, convexity=10, twist=0) projection(cut=false) scale(1.1) hull() pendant();
			} else {
				linear_extrude(height=funnelHeight, convexity=10, twist=0) projection(cut=false) scale(1.1) hull() pendant();
			}
		}
	}

	if (part!="mold3") {
		pendant();
	} else {
		cylinder(r1=pourwayLittleR, r2=funnelTopRadius, h=funnelHeight);
	}

	if (makeMold && makeMoldHole) {
		#mirror([0,0,1]) translate([0,0,torusRingThickness]) cylinder(r2=moldHoleRadius[0], r1=moldHoleRadius[1], h=torusRingThickness*0.2);
	}
}
```