[User]
I'm working on a design for a 3D printer, and I'd like to incorporate a belt clearance setup similar to the one designed by Thingiverse user hughee (thing:1208821) for the PrintRite DIY 3D printer. I need to be able to customize the idlers based on the type of bearings I have available, and I also want to incorporate spacers to fine-tune the belt alignment.

The idler should have two configurations: one for the X home position and one for the X end position. It should also be possible to make them toothless, or with teeth.

Specifically, I need to be able to adjust the following parameters in the generated OpenSCAD code:

*   **Idler Type:** Whether the idler has teeth or is toothless.
*   **Bearing Holding Type:** Whether the bearing is held captive within the idler or uses a plug-in design.
*   **Bearing Outer Diameter (OD):** The outer diameter of the bearing.
*   **Bearing Width:** The width of the bearing.
*   **Bearing Inner Diameter (ID):**  The inner diameter of the bearing (this will be used for the spacers).
*   **Tolerance:** A value to account for printer accuracy, allowing for a tighter or looser fit when inserting the bearing. A positive tolerance value will create more space.
*   **Resolution ($fn):** To control the smoothness of the curved surfaces.

I'd like the design to include separate modules for the idler, the bearing, and the spacers. The idler module should be able to generate either the X home or X end idler based on a parameter. The bearing module should create a representation of the bearing with the specified dimensions and tolerance, and also allow for the plug-in configuration that has a small lip that is extruded out of a ring. The spacers should be cylinders with an inner diameter to fit a screw and an outer diameter to fit within the bearing's inner race. These spacers will have two different diameter profiles to properly support the bearing.

I will also need to combine this idler assembly with a motor mount, but I will provide that separately (thing:1586712).

Could you help me design a parametric OpenSCAD file or files to achieve this? I believe the MCAD library contains useful modules for this project, but you are free to use others as well.

[Assistant]
X-axis-Belt-clearence_Idler-customizer.scad:
```

/* [Idler profile] */
//Render, choose idler to render
Part=1;//[0:X home idler,1:X end idler,2:Spacers]

//Idler type
Type=1;//[1:teeth,0:toothless]

//bearing holding type
BHT=0;//[0:captive,1:plug-in]

/* [Bearing profile] */
//Outer diameter
OD=22;
//bearing width
width=7;
//Inner diameter (for spacers only)
ID=8;

/* [Tuning] */
//printer accuracy, positive value will create MORE space to plug the bearing (0.15 is a good value)
tolerance=0.15;

//definition
$fn=30;//[30:Low,60:medium,100:High]

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

module Idler(a,b) {
    if(a==0) {
        for(i=[0,180]) rotate([i,0,0]) translate([0,0,-5]) cylinder(d1=21.15+4,d2=21.15,h=1.75);
        difference() {
            cylinder(d=21.15,h=10,center=true);
            for(i=[0:360/34:360]) rotate([0,0,i]) translate([0,21.15/2,0]) scale([0.875,1.15,b]) cylinder(d=1.6,h=12,$fn=50,center=true);
        }
    }
    else if(a==1) {
        for(i=[0,180]) rotate([i,0,0]) translate([0,0,-5]) cylinder(d1=27.5+4,d2=27.5,h=1.75);
        difference() {
            cylinder(d=27.5,h=10,center=true);
            for(i=[0:360/44:360]) rotate([0,0,i]) translate([27.3/2,0,0]) scale([1,0.875,b]) cylinder(d=1.6,h=12,$fn=50,center=true);
        }
    }
    else {}

}

module Bearing(a) {
    if((a>=0)&&(a<=1)) {
        cylinder(d=OD+2*tolerance,h=width+0.2,center=true);
        cylinder(d=OD-2.5,h=12,center=true);
        translate([0,0,0.05+width/2]) cylinder(d1=OD+2*tolerance,d2=OD-2.5,h=(10-width)/4);
        scale([1,1,BHT]) difference() {
            cylinder(d=OD+2*tolerance,h=width+0.2);
            translate([0,0,width/2+0.25]) rotate_extrude() translate([OD/2+tolerance,0,0]) circle(d=0.5);
        }
    }
    else {}
}

module Spacers(a) {
    if(a==2) {
        for(i=[10,-10]) translate([i,0,0]) difference() {
            union() {
                cylinder(d=ID+3.5,h=(14-width)/2);
                cylinder(d=ID-2*tolerance,h=7-0.2);
                }
            translate([0,0,-1]) cylinder(d=3.4,h=9);
            }
        }
    else{}
}

difference() {
    Idler(Part,Type);
    Bearing(Part);
}

Spacers(Part);

```


[User]
I need an OpenSCAD design for a thread spool holder that can fit inside a plastic box. The design should be a parametric grid of posts that hold the spools. I want to be able to print it in parts since my printer isn't large enough to print the whole thing at once.

Here are the specific parameters I'd like to be able to control:

*   **`fillet_radius`**: The radius of the fillet at the base of each post (where it meets the base plate).
*   **`base_thickness`**: The thickness of the base plate that the posts are attached to.
*   **`holder_diameter`**: The diameter of the cylindrical part of the post that holds the spool.
*   **`cell_distance`**: The distance between the centers of adjacent posts.
*   **`total_height`**: The total height of each post.
*   **`rows`**: The number of rows in the grid.
*   **`cols`**: The number of columns in the grid.

The posts should be arranged in a hexagonal grid pattern, so that the spools are packed as efficiently as possible. Each post should have a hexagonal base that transitions smoothly into the cylindrical holder. It should also have a rounded tip.

For each post, it should make a hexagonal prism with height `total_height / 2` and inradius `cell_distance / (2 * cos(30))`, then take the difference between this and a rotate-extruded shape (details in code). It should make a hull of a few spheres to create the rounded tip. I have attached the code that accomplishes this for one post, but it would be great if the AI could just incorporate these features into its design directly.

Please make the grid in a way that lets me control the number of rows and columns. Also, make sure the posts in every other column are offset by half of the `cell_distance` in the x-direction, so that they form the hexagonal pattern.

Finally, it would be ideal if the design could use the MCAD library.

```
//fillet radius
fillet_radius = 10;
//base thickness
base_thickness = 3;
//diameter holder
diameter_holder = 10;
//cell distance
cell_distance = 45;
//total height
total_height = 70;
//rows
iRows = 4;
//cols
iColumns = 3;

module spitze(rr,tb,ds,delta,hh){

union(){
    difference()
    {
        rotate([0,0,30]) cylinder(h = hh/2, d=delta/(2*cos(30))*2+0.001, $fn = 6);
        rotate_extrude(convexity = 10, $fn = 12) hull()
        {
            translate([ds/2+rr-.2, rr+tb, 0]) circle(r = rr, $fn = 60);
            translate([ds/2+rr-.2, hh, 0]) circle(r = rr, $fn = 60);
            translate([delta, rr+tb, 0]) circle(r = rr, $fn = 60);
            translate([delta, hh, 0]) circle(r = rr, $fn = 60);
        }
    }
    hull(){
        translate([0,0,hh/2-0.01]) sphere(d=ds, $fn = 12);
        translate([0,0,5/7*hh]) sphere(d=ds, $fn = 12);
        translate([0,0,hh-ds/4]) sphere(d=ds/2, $fn = 12);
    }
}
}

union(){
for (i=[0:iRows-1]){ //6
    for (j=[0:iColumns-1]){ //6

        if(round(j/2)*2==j){
			translate ([0+45*i,   j*sin(60)*45,0]) spitze(fillet_radius,base_thickness,diameter_holder,cell_distance,total_height);
		}
        else
        {
			translate ([45/2+45*i,   j*sin(60)*45,0]) spitze(fillet_radius,base_thickness,diameter_holder,cell_distance,total_height);
		}
    }
}
}
```

[Assistant]
Thread_spool_holder.scad:
```
//fillet radius
fillet_radius = 10;
//base thickness
base_thickness = 3;
//diameter holder
diameter_holder = 10;
//cell distance
cell_distance = 45;
//total height
total_height = 70;
//rows
iRows = 4;
//cols
iColumns = 3;

module spitze(rr,tb,ds,delta,hh){

union(){
    difference()
    {
        rotate([0,0,30]) cylinder(h = hh/2, d=delta/(2*cos(30))*2+0.001, $fn = 6);
        rotate_extrude(convexity = 10, $fn = 12) hull()
        {
            translate([ds/2+rr-.2, rr+tb, 0]) circle(r = rr, $fn = 60);
            translate([ds/2+rr-.2, hh, 0]) circle(r = rr, $fn = 60);
            translate([delta, rr+tb, 0]) circle(r = rr, $fn = 60);
            translate([delta, hh, 0]) circle(r = rr, $fn = 60);
        }
    }
    hull(){
        translate([0,0,hh/2-0.01]) sphere(d=ds, $fn = 12);
        translate([0,0,5/7*hh]) sphere(d=ds, $fn = 12);
        translate([0,0,hh-ds/4]) sphere(d=ds/2, $fn = 12);
    }
}
}

union(){
for (i=[0:iRows-1]){ //6
    for (j=[0:iColumns-1]){ //6

        if(round(j/2)*2==j){
			translate ([0+45*i,   j*sin(60)*45,0]) spitze(fillet_radius,base_thickness,diameter_holder,cell_distance,total_height);
		}
        else
        {
			translate ([45/2+45*i,   j*sin(60)*45,0]) spitze(fillet_radius,base_thickness,diameter_holder,cell_distance,total_height);
		}
    }
}
}

```


[User]
I'd like to create a tray for a zen garden, and I'd like it to be parametric so I can easily change its size. It should be a simple rectangular tray with a flat bottom and four walls.

Specifically, I want to be able to set the following parameters:
* `buildPlateLength`: The overall length of the tray.
* `buildPlateWidth`: The overall width of the tray.
* `height`: The total height of the tray walls.
* `wallThickness`: The thickness of the tray walls.
* `flair`: A hidden parameter representing how much the base is inset from the outer walls.
* `buffer`: A hidden parameter, which is flair + 5, and controls the inset of the base.

The base of the tray should be a rectangle that is inset from the outer edges by the `buffer` on all sides. The walls should then extend up from the edges of this base rectangle to the desired `height`, and the bottom of these walls should rest on a plane at half the `wallThickness` value above the zero-z plane. Basically, the total height of the tray should be the defined height.

The tray itself should be formed as a union of several cubes, which can be combined using `union()`. I'm not looking to do anything fancy like curves or chamfers, just straightforward rectangular shapes.

Could you generate the OpenSCAD code for this?

[Assistant]
zenGardenTray.scad:
```
buildPlateLength = 150;
buildPlateWidth = 200;
height = 20;
wallThickness = 5;

/* [Hidden] */
flair = 20;
buffer = flair + 5;

union() {
	translate([0, 0, wallThickness/2]) cube([buildPlateLength - buffer, buildPlateWidth-buffer, wallThickness], center = true);

	translate([0, (buildPlateWidth-buffer)/2, height/2]) cube([buildPlateLength, wallThickness, height], center = true);

	translate([0, -(buildPlateWidth-buffer)/2, height/2]) cube([buildPlateLength, wallThickness, height], center = true);

	translate([-(buildPlateLength-buffer)/2, 0, height/2]) cube([wallThickness, buildPlateWidth, height], center = true);

	translate([(buildPlateLength-buffer)/2, 0, height/2]) cube([wallThickness, buildPlateWidth, height], center = true);
}
```


[User]
Hey, I need a replacement part for my Intex pool, and I'd like to be able to customize it easily. I'm thinking of a mostly hollow, roughly rectangular piece with rounded top edges and two through holes. I've got some dimensions for you to work with.

Here's the basic idea: the part is essentially a rectangular box with a hollowed-out center, and the top edges are rounded over. It needs to be parametric so I can tweak it later.

Here are the parameters I'd like to use:

*   `length`: The overall length of the piece. Let's start at 48.8 mm.
*   `width`: The overall width of the piece. Let's start at 28 mm.
*   `height`: The overall height of the piece. Let's start at 71 mm.
*   `breadth`: The thickness of the walls. Let's start at 1.5 mm.
*   `rounding_top`: The radius of the rounding at the top corners. Let's start at 3.5 mm.
*   `hole1_position`: The vertical position of the center of the first hole. Start at 2.3 mm.
*   `hole_distance`: The vertical distance between the centers of the two holes. Start at 10.5 mm.
*   `hole_diameter`: The diameter of the holes. Let's start with 9.2 mm.

The core of the part is basically a rectangular prism, but the actual piece needs to have the center removed and the top edge rounded. Also, the holes are aligned vertically through the sides of the rectangle - not through the top, so their axis runs the length of the rectangle.

I'm not sure how best to handle the rounding, but I imagine it might involve intersecting a cylinder or something with the outer shape. You also don't need to worry about it being super precise because my printer will round it off a little bit anyway.

I'd also like the OpenSCAD file to use `$fn=100` to give a decent cylinder resolution. I don't want to rely on any external libraries, I'd prefer it if you could keep it all in a single .scad file.

Can you generate the OpenSCAD code for me? Thanks!

[Assistant]
intex_stand_endcap.scad:
```
length=48.8;
width=28;
height=71;
breadth=1.5;
rounding_top=3.5;
hole1_position=2.3;
hole_distance=10.5;
hole_diameter=9.2;

$fn=100;

sheight=height-rounding_top;
module outer() {
    translate([(length-width)/2,0,0]) cylinder(h=sheight, d=width);
    translate([-(length-width)/2,0,0]) cylinder(h=sheight, d=width);
    translate([-(length-width)/2,-width/2,0]) cube([length-width,width,sheight]);
}

module inner() {
    translate([(length-width)/2,0,-0.01]) cylinder(h=sheight+0.02, d=width-2*breadth);
    translate([-(length-width)/2,0,-0.01]) cylinder(h=sheight+0.02, d=width-2*breadth);
    translate([-(length-width)/2,-width/2+breadth,-0.01]) cube([length-width,width-2*breadth,sheight+0.02]);
}

difference() {
    outer();
    inner();
    translate([0,0,hole1_position+hole_diameter/2]) rotate([0,90,0]) cylinder(h=length+0.02, d=hole_diameter,center=true);
    translate([0,0,hole1_position+hole_diameter*1.5+hole_distance]) rotate([0,90,0]) cylinder(h=length+0.02, d=hole_diameter,center=true);
}

intersection() {
    translate([0,0,sheight]) rotate([0,90,0]) scale([rounding_top*2/width,1,1]) cylinder(h=length+0.02, d=width,center=true);
    difference() {
        translate([0,0,rounding_top+0.01]) outer();
        translate([-length/2-0.01,-width/2-0.01,0]) cube([length+0.02,width+0.02,height-rounding_top-0.01]);
    }
}

```


[User]
I'd like to create a customizable fractal tree, similar to the one described in the Instructables article, but with a few of my own twists. I'm looking for an OpenSCAD design that uses a recursive algorithm to generate the tree structure.

Here are the basic parameters I need to be able to control:

*   **Random Seed:** This will allow me to generate different tree variations while keeping the overall structure consistent for a given seed.
*   **Text:** I'd like to be able to add custom text around the base of the tree, ideally using the "Write" library by HarlanDMii.
*   **Number of Iterations (Depth):** This should control the level of recursion, effectively determining how many branches the tree has, with a warning about how computationally expensive each new iteration will be.
*   **Starting Height:** The initial height of the main trunk.
*   **Leaf Scale:** A scaling factor for the size of the leaves, relative to the branch size.
*   **Text Font:**  I want to choose from a selection of fonts like "orbitron.dxf", "knewave.dxf", "braille.dxf" and "Blackrose.dxf".
*   **Text Height:** The height of the text on the base.
*  **Width Ratios**: The amount of taper for each branch segment, with separate ratios for the bottom and top of each cylinder.
*   **Knuckle Size:** Size of the sphere "knuckles" between branch segments.
*   **Min/Max Rate of Growth:** Minimum and maximum size ratios of new branch segments relative to their parent.
*   **Smoothness:** The number of faces for cylinders, spheres, and base elements.

I need different branch modules that each have some randomness. These modules should have the option of splitting into between one and four smaller branches, each with some degree of random rotation and scaling. The leaves should be spheres, and their size should be a function of branch size and a random modifier. The base of the tree should be a simple cylinder with the text written on its side.

I understand that you will need to generate the entire design including the usage of the "Write" library, which I understand is external. The "Write" library uses .dxf font files, so the design should be prepared to handle that, and the base cylinder should have a suitable radius for the text to be displayed properly.

[Assistant]
Step_5.scad:
```
// Customizable Fractal Tree
//
// By steveweber314
//
// 5/12/2015
//
// Utilizes thing:16193 "Write" by HarlanDMii
//
// This builds a tree using a recursive algorithm. For more information, please visit the Instructable, at http://www.instructables.com/id/Procedurally-Generated-Trees/
//
//
// BEGIN CUSTOMIZER

/* [Tree Parameters] */

//Random Seed
random_seed = 46;

//text
text1 = "Your Text Here";

//depth of recursion (warning: each iteration will take exponentially more time to process)
number_of_iterations = 5; // [1:10]

//starting height of the first branch
height = 45; //[1:100]

//maximum size of a leaf relative to the branch
leaf_scale = 2.0; //[0.10:10.0]

/* [Advanced Parameters] */

//font
text_font = "orbitron.dxf";//[Letters.dxf,orbitron.dxf,knewave.dxf,braille.dxf,Blackrose.dxf]

// text height
text_height=10; // [4:25]

//control the amount of taper on each branch segment
width_ratio_bottom = 0.25;
width_ratio_top = 0.20;

//size of the "knuckles" between segments
knuckle_size = 0.24;

//minimum size ratio of a new branch to its parent
min_rate_of_growth = 0.85; //[0.05:1.0]

//maximum size ratio of a new branch to its parent
max_rate_of_growth = 1.20; //[1.0:5.0]

//number of faces on the cylinders
level_of_smoothness = 16; // [4:100]

//number of faces on the spheres
leaf_smoothness = 16; // [4:100]

//number of faces on the base/stand
base_smoothness = 60; //[20:200]

use <write/Write.scad>

module trunk(size, depth, seed)
{
    //create an array of random numbers
    operation = rands(1,4,1, seed+5);

    //automatically stop if the size gets too small so we dont waste computation time on tiny little twigs
    if (size > 5)
    {
        //choose a module based on that array
        if (operation[0] < 1)
        {
            branch_one(size*.9, depth, seed+1);
        }
        if (operation[0] < 2)
        {
            branch_two(size*.9, depth, seed+2);
        }
        else if (operation[0] < 3)
        {
            branch_three(size*.9, depth, seed+3);
        }
        else if (operation[0] < 4)
        {
            branch_four(size*.9, depth, seed+4);
        }
    }

}

module branch_one(size, depth, seed)
{
    sizemod = rands(min_rate_of_growth,max_rate_of_growth,10, seed+1);
	entropy = rands(0.01,leaf_scale,1, seed+2);
	rotations = rands(-20,20,10, seed+3);

	color([1,1,0])
	{
		//create the branch by tapering a cylinder from one radius to another
		cylinder(h = size, r1 = size*width_ratio_bottom, r2 = size*width_ratio_top);
	}

	//move to the tip of the branch
	translate([0,0,size])
	{
		//check for stop condition
		if (depth > 0)
		{
            union()
            {
                //create a "knuckle"
                sphere(size*knuckle_size);
                rotate([0+rotations[0],0+rotations[1],0+rotations[2]])
                {
                    //build another trunk
                    trunk(size*.9*sizemod[0], depth-1, seed+1);
                }
            }
		}
		else
		{
            //create the leaves
			color([0.5,0.5,0]) {
				sphere(size*entropy[0], $fn=leaf_smoothness);
			}
		}
	}
}

module branch_two(size, depth, seed)
{
    sizemod = rands(min_rate_of_growth,max_rate_of_growth,10, seed+1);
	entropy = rands(0.01,leaf_scale,1, seed+2);
	rotations = rands(-20,20,10, seed+3);

	color([1,1,0]) {
		cylinder(h = size, r1 = size*width_ratio_bottom, r2 = size*width_ratio_top);
	}

	translate([0,0,size])
	{

		if (depth > 0)
		{
            union()
            {
                sphere(size*knuckle_size);
                rotate([0+rotations[0],30+rotations[1],0+rotations[2]])
                {
                    trunk(size*.9*sizemod[0], depth-1, seed+2);
                }
                rotate([0+rotations[3],30+rotations[4],180+rotations[5]])
                {
                    trunk(size*.9*sizemod[1], depth-1, seed+3);
                }
            }
		}
		else
		{
			color([0.5,1,0]) {
				sphere(size*entropy[0], $fn=leaf_smoothness);
			}
		}
	}
}

module branch_three(size, depth, seed)
{
    sizemod = rands(min_rate_of_growth,max_rate_of_growth,10, seed+1);
	entropy = rands(0.01,leaf_scale,1, seed+2);
	rotations = rands(-20,20,10, seed+3);

	color([1,1,0]) {
		cylinder(h = size, r1 = size*width_ratio_bottom, r2 = size*width_ratio_top);
	}

	translate([0,0,size])
	{

		if (depth > 0)
		{
            union()
            {
                sphere(size*knuckle_size);
                rotate([0+rotations[0],30+rotations[1],0+rotations[2]])
                {
                    trunk(size*.9*sizemod[0], depth-1, seed+4);
                }
                rotate([0+rotations[3],30+rotations[4],120+rotations[5]])
                {
                    trunk(size*.9*sizemod[1], depth-1, seed+5);
                }
                rotate([0+rotations[6],30+rotations[7],240+rotations[8]])
                {
                    trunk(size*.9*sizemod[2], depth-1, seed+6);
                }
            }
		}
		else
		{
            color([0.2,0.6,0]) {
				sphere(size*entropy[0], $fn=leaf_smoothness);
			}
		}
	}
}

module branch_four(size, depth, seed)
{
    sizemod = rands(min_rate_of_growth,max_rate_of_growth,10, seed+1);
	entropy = rands(0.01,leaf_scale,1, seed+2);
	rotations = rands(-20,20,12, seed+3);

	color([1,1,0]) {
		cylinder(h = size, r1 = size*width_ratio_bottom, r2 = size*width_ratio_top);
	}

	translate([0,0,size])
	{

		if (depth > 0)
		{
            union()
            {
                sphere(size*knuckle_size);
                rotate([0+rotations[0],30+rotations[1],0+rotations[2]])
                {
                    trunk(size*.9*sizemod[0], depth-1, seed+7);
                }
                rotate([0+rotations[3],30+rotations[4],90+rotations[5]])
                {
                    trunk(size*.9*sizemod[1], depth-1, seed+8);
                }
                rotate([0+rotations[6],30+rotations[7],180+rotations[8]])
                {
                    trunk(size*.9*sizemod[2], depth-1, seed+9);
                }
                rotate([0+rotations[9],30+rotations[10],270+rotations[11]])
                {
                    trunk(size*.9*sizemod[2], depth-1, seed+10);
                }
            }
		}
		else
		{
            color([0.2,0.6,0]) {
				sphere(size*entropy[0], $fn=leaf_smoothness);
			}
		}
	}

}

union()
{
        translate([0,0,text_height*-2-5])
        {
            color([0.2,0.6,0]) {
                difference()
                {
                    //create the base
                    union()
                    {
                        //sphere(40, $fn=base_smoothness);
                        translate([0,0,text_height+5])
                        {
                            cylinder(h=text_height, r1 = 42, r2 = height*.20, $fn=base_smoothness);
                        }
                        cylinder(h = text_height+5, r1 = 42, r2 = 42, $fn=base_smoothness);
                    }

                    //write the text on the base
                    writecylinder(text1,[0,0,0],radius=44,height=text_height+5,t=6,up=0,h=text_height,font=text_font);

                }
            }
        }
    //build the tree
    trunk(height, number_of_iterations, $fn=level_of_smoothness, random_seed);
}

```


[User]
Okay, I need a parametric OpenSCAD design for a cord lock, or rather, a cord anchor. I'd like it to be configurable for two different cord diameters, a space between the cords, and overall thickness of the part, plus a tightness setting to determine how snug the fit is. I also want a tolerance parameter for printing. It needs to have a sort of snap-fit mechanism.

Specifically, I need parameters for:

*   `diameter1`: The diameter of the first, smaller cord.
*   `diameter2`: The diameter of the second, larger cord.
*   `offsetVal`: The spacing between the centers of the two cord holes.
*   `thickness`: The overall thickness of the anchor.
*   `clampthickness`: The thickness of the snap-fit section.
*   `fitVal`: An integer value, say between 1 and 10, to adjust the tightness of the grip.
*   `OversizeTolerance`: A small value to add a little extra size to account for printing tolerances.

I'd like the design to use two mirrored halves. The cord holes should be cylindrical with rectangular "clamp" sections underneath the cylinders on the inside of the anchor. These clamps create the snap-fit. There is a specific method by which the clamps are created which is provided by example. This method uses difference() to remove the interior space, and then a scale/translate union() to add the hole and the clamp. The mirrored sections have an offset to create a more organic look (instead of flat mirroring)

Please provide the full SCAD code for this. I don't want to use any pre-built libraries, like MCAD or BOSL, just vanilla OpenSCAD.

[Assistant]
CordLock_V5.scad:
```

// diameter of the first or smaller chord
diameter1 = 6;

// diameter of the second or larger chord
diameter2 = 8;

// spacing between the 2 chords
offsetVal = 7;

// Thickness of part
thickness = 5;

// Thickness of bending snap fit
clampthickness = 3.2;

// Tightness of fit
fitVal = 3; // [1,2,3,4,5,6,7,8,9,10]

// adds an tolerance for over-sizing
OversizeTolerance = 0.3;

tightness = 2-(fitVal/20);
radius1 = (diameter1+OversizeTolerance)/2;
radius2 = (diameter2+OversizeTolerance)/2;
offset1 = offsetVal/2;

module build1(radius,offset) {
    difference() {
        cubeWidth = clampthickness*radius;
        cubeLength = offset + (2.3*radius);
        union() {
            cube([cubeLength,cubeWidth,thickness], false);
        }
        scale([1,1,2]) translate([0,0,-thickness*0.25])
        union() {
            $fn = 20;
            translate([offset+(radius),cubeWidth/2,0])
                cylinder(h = thickness, r = radius, center = false);

            translate([(offset+radius),(clampthickness-tightness)*radius/2,0])
                cube([2*radius,tightness*radius,thickness],false);
        }
    }
}

module chordLock(r1,r2,o1) {
    // this calculates the value for centering
    // the mirrored part
    alignOffset = (clampthickness*abs(r1-r2)/2);

    // this builds the first half
    build1(r1,o1);

    // this mirrors the second half
    mirror([1,0,0]) translate([0,-alignOffset,0])
    build1(r2,o1);
}

chordLock(radius1,radius2,offset1);

```


[User]
I'd like to create a set of educational models that illustrate conic sections. I want to be able to print a central "core" piece which has cutouts that correspond to the hyperbola, parabola, and ellipse shapes, along with a circle shape on a slightly separate section. Each of these shapes will be individual, printable pieces that will slot into the cutouts on the core to represent the different conic sections. I also want the option to include small cylindrical holes for magnets on each of the main shapes (core, hyperbola, parabola, ellipse, and circle).

The core should be a solid, partially cut cylinder. It should have cutouts for the hyperbola, parabola and ellipse. These should be made using cube primitives, rotated at angles, and subtracted from the base cylinder using difference. The shapes (hyperbola, parabola, ellipse) should be positioned such that they look correct with respect to the cut-out from the core. Text labels should be extruded on each shape indicating which conic section it is (e.g. "HYPERBOLA", "PARABOLA", "ELLIPSE"), and a separate "CIRCLE" label should also be extruded on the circle piece. All the text labels should use the "Open Sans:style=Bold" font. I would also like to have my name "MILAN PEKSA" and the year "2016" included as text extrusions on the core part. The text labels for the core are to be placed near the base. All text should be 4mm high, with appropriate sizes to be readable.

The individual conic sections should all be created using the intersection of a cylinder with a cube, with the correct rotation as in the core. All pieces (including the core) should have a "magnetsholes" variable that can be toggled on or off. When on, each shape should have cylindrical holes for small magnets (3mm diameter, 3mm deep or so, with a tolerance so the magnets fit properly -- say 3.2mm diameter and 6.4mm deep). The placement of the magnets should vary from shape to shape, but the placement of the magnets on the individual shape should correspond to the placement of the holes on their corresponding cutouts on the core piece.

The number of fragments for cylinder generation (fn variable) should be a customizable parameter.

I would like to be able to select which model I am generating: just the hyperbola, just the parabola, just the ellipse, just the core, just the circle, or all. The text labels should be separate from the selection, i.e., I do not want the text to be part of a selected model if not explicitly requested. It would be nice if I could also call a 'bottom text check' model that generates all of the elements and shows the labels, but without magnets.
Could you please create these files? I do not have any custom libraries available.

[Assistant]
ConeFinal.scad:
```
//Milan Peksa 2016 V1.0
// Creative Commons - Attribution - Non-Commercial

// Which one would you like to see?
part = "both"; // [1:Hyperbola,2:Parabola,3:Ellipse,4:Core,5:Circle,6:Bottom text check]
// BOTTOM TEXT 1. line
note1="    MILAN PEKSA";
// BOTTOM TEXT 2. line
note2="2016";

// DESCRIPTION TEXT ELLIPSA
mellipse="ELIPSA";
// DESCRIPTION TEXT HYPERBOLA
mhyperbola="HYPERBOLA";
// DESCRIPTION TEXT PARABOLA
mparabola="PARABOLA";
// DESCRIPTION TEXT CIRCLE
mcircle="KRUŽNICE";
// MAGNETS HOLES SWITCH
magnetsholes=true; // [true,false]
// Number Of Fragments
NoFragments=50;

print_part();

//color("red") {translate([5,0,0])  hyperbola($fn=NoFragments);};
//color("blue") {translate([-5,0,0])parabola($fn=NoFragments);};
//color("cyan") {translate([0,0,5])ellipse($fn=NoFragments);};
//rotate([180,0,0]) ellipse($fn=NoFragments); // for  printing
//color("green") {core($fn=NoFragments);};
//color("purple") {translate([0,0,10])ncircle($fn=NoFragments);};

//http://www.dx.com/p/3x3mm-ndfeb-magnet-silver-60pcs-415498#.V0yINPmLSUk

module print_part() {
	if (part == 1) {
		rotate([0,0,180]) hyperbola($fn=NoFragments);
	} else if (part == 2) {
		parabola($fn=NoFragments);
	} else if (part == 3) {
		rotate([180,0,180]) ellipse($fn=NoFragments);
	} else if (part == 4) {
		core($fn=NoFragments);
	} else if (part == 5) {
		ncircle($fn=NoFragments);
	} else if (part == 6) {
		BootomTextCheck($fn=NoFragments);
	}
}

module BootomTextCheck()
{
    rotate([90,0,270])
     { hyperbola($fn=NoFragments);
     parabola($fn=NoFragments);
     core($fn=NoFragments);};

}

module core()
{

difference() {
    cylinder(h = 200, r1 = 100, r2 = 0, center = false);

    translate([5,0,175])
	rotate([0,-65,0])
		cube([150,220,250],center=true);

    translate([-65,0,0])
	rotate([0,-26.565051177077989351572193720453,0])
		cube([100,220,180],center=true);

    translate([120,0,20])
    rotate([0,0,0])
    cube([100,220,180],center=true);

   {//parabola
      rotate([0,-26.565051177077989351572193720453,0])
    translate([-8, 58,30])
    rotate([90,0,-90])
    linear_extrude(height = 4, center = true, convexity = 10, twist = 0)
    {
    text(mparabola,size=15 ,font = "Open Sans:style=Bold");
    }
   }

   {// hyperbola
    translate([70, -44,15])
    rotate([90,0,90])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text("HYPERBOLA", font =  "Open Sans:style=Bold");
    }
}

   {// elipsa
    translate([19, -35,86])
    rotate([25,0,90])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text(mellipse,size=15, font = "Open Sans:style=Bold");
    }

    // notes
    translate([93,-5,0])
    rotate([0,180,00])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text(note1,size=15, font =  "Open Sans:style=Bold");
    }
    translate([65,-60,0])
    rotate([0,180,00])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text(note2,size=30, font =  "Open Sans:style=Bold");
    }
    if(magnetsholes)
    {
        //magnets holes
    {// magnets holes hyperbola
    translate([70-3.2,55,7])
	rotate([0,90,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([70-3.2,-55,7])
	rotate([0,90,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([70-3.2,0,47])
	rotate([0,90,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);
    }
 //magnets holes parabola
    {
    translate([-15-3.2,75,12])
	rotate([0,63,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([-15-3.2,-75,12])
	rotate([0,63,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([-48-3.2,-20,77])
	rotate([0,63,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([-48-3.2,20,77])
	rotate([0,63,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);
    }

    //magnets holes elipsa
    {
    translate([-15-3.2,30,96+3.2])
	rotate([0,25,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([-15-3.2,-30,96+3.2])
	rotate([0,25,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([40,30,69+3.2])
	rotate([0,25,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([40,-30,69+3.2])
	rotate([0,25,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);
    }
}
}
}
}
//--------------------------------------
module ncircle()
{
    difference() {
    intersection() {
    cylinder(h = 200, r1 = 100, r2 = 0, center = false);

    translate([0,0,170])
    cube([150,220,80],center=true);

}
    translate([-30, 4,130])
    rotate([180,0,0])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text(mcircle,size=8, font ="Open Sans:style=Bold");
    }
    if(magnetsholes)
    {
    // magnets holes kruznice
    translate([0,-23,130-3.2])
	rotate([0,0,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([0,23,130-3.2])
	rotate([0,0,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    }
}
}

//--------------------------------------
module ellipse()
{
    difference() {
    intersection() {
    cylinder(h = 200, r1 = 100, r2 = 0, center = false);

    translate([5,0,175])
	rotate([0,-65,0])
		cube([150,220,250],center=true);

}
    translate([0,0,170])
    cube([150,220,80],center=true);

    translate([19, 35,86])
    rotate([-25,180,90])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text("ELIPSA",size=15, font ="Open Sans:style=Bold");
    }

    translate([-30, -4,130])
    rotate([0,0,0])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text(mcircle,size=8, font ="Open Sans:style=Bold");
    }
    if(magnetsholes)
    {
     //magnets holes
    {
    translate([-15-3.2,30,96+3.2])
	rotate([0,25,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([-15-3.2,-30,96+3.2])
	rotate([0,25,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([40,30,69+3.2])
	rotate([0,25,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([40,-30,69+3.2])
	rotate([0,25,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    // magnets holes kruznice
    translate([0,-23,130-3.2])
	rotate([0,0,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([0,23,130-3.2])
	rotate([0,0,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

}
}
}
}
//--------------------------------------
module parabola()
{
    difference() {
    intersection()
    {
    cylinder(h = 200, r1 = 100, r2 = 0, center = false);
    translate([-65,0,0])
	rotate([0,-26.565051177077989351572193720453,0])
		cube([100,220,180],center=true);

    }

    rotate([0,-26.565051177077989351572193720453,0])
    translate([-8, -57,30])
    rotate([90,0,90])
    linear_extrude(height = 4, center = true, convexity = 10, twist = 0)
    {
   text(mparabola,size=15 ,font = "Open Sans:style=Bold");
    }

    // notes
    translate([93,-5,0])
    rotate([0,180,00])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text(note1,size=15, font =  "Open Sans:style=Bold");
    }
    translate([65,-60,0])
    rotate([0,180,00])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text(note2,size=30, font = "Open Sans:style=Bold");
    }

    if(magnetsholes)
    {
     //magnets holes
    {
    translate([-15-3.2,75,12])
	rotate([0,63,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([-15-3.2,-75,12])
	rotate([0,63,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([-48-3.2,-20,77])
	rotate([0,63,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([-48-3.2,20,77])
	rotate([0,63,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);
}
}
}

}
//--------------------------------------
module hyperbola()
{
    difference() {
    intersection()
    {
    cylinder(h = 200, r1 = 100, r2 = 0, center = false);
       translate([120,0,20])
        rotate([0,0,0])
            cube([100,220,180],center=true);

    }

    translate([70, 42,15])
    rotate([90,0,-90])
    linear_extrude(height = 4, center = true, convexity = 10, twist = 0)
    {
    text(mhyperbola, font = "Open Sans:style=Bold");
    }
    // notes
    translate([93,-5,0])
    rotate([0,180,00])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text(note1,size=15, font ="Open Sans:style=Bold");
    }
    translate([65,-60,0])
    rotate([0,180,00])
    linear_extrude(height = 4, center =     true, convexity = 10, twist = 0)
    {
    text(note2,size=30, font ="Open Sans:style=Bold");
    }
    if(magnetsholes)
    {
    //magnets holes
{
    translate([70-3.2,55,7])
	rotate([0,90,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([70-3.2,-55,7])
	rotate([0,90,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);

    translate([70-3.2,0,47])
	rotate([0,90,0])
    cylinder(h = 6.4, r1 = 1.5, r2 = 1.5, center = false);
}
}
}

}

```


[User]
Okay, I'm looking to design a customizable centrifugal impeller system, and I'd like it to be fully parametric in OpenSCAD. I need the ability to adjust various aspects of the impeller, its housing, and the inlet/outlet connections.

Specifically, I need:

**Impeller Design:**

*   **Number of Blades:**  I need to be able to specify how many blades the impeller has.
*   **Blade Thickness:** I should be able to control the thickness of each blade.
*   **Blade Height:**  The height of the blades needs to be adjustable.
*   **Blade Type:** I want to choose between straight and curved blades.
*   **Curved Blade Curvature:** If I choose curved blades, I need to adjust the curvature.
*   **Blade Direction:** For curved blades, I need to specify the direction of the curve (clockwise or counter-clockwise).
*   **Twist Angle:** For the curved blades, I need a twist angle to give them a helical shape.
*   **Curved Blade Resolution:** I need control over how finely curved blades are rendered to balance performance.
*  **Base Girth:** The thickness of the base of the impeller should be editable.
*   **Main Fan Diameter:** The overall diameter of the impeller.
*  **Shaft Hole Shape:**  I need to specify the shape of the shaft hole for attaching to a motor, with options like a smooth circle, a hexagon, or a D-shape.
*  **Shaft Diameter:** The diameter of the shaft hole should be editable.
*   **Air Intake Cutout:** I want to pick between a cylindrical or conical cutout for the air intake.
*  **Cone Angle:** For the conical intake, I need to adjust the cone's angle.
*  **Shaft Boss Offset & Height:** The size of the boss surrounding the shaft hole should be customizable.
*   **D-Cut Ratio:** For D-shaped shaft holes, I'd like to specify where the flat edge is located.

**Housing Design:**

*   **Impeller/Housing Offset:** I need control over the spacing between the impeller's outer diameter and the housing's inner diameter.
*   **Fan/Cap Z Spacing:** I should be able to adjust the vertical distance from the top of the impeller to the cap.
*   **Housing Wall Thickness:** The thickness of the housing walls.
*   **Motor Mount:** I need a mount for a DC motor to be optional, with controls over the motor mount's inner and outer diameters, and height.
*   **Motor Shaft Diameter:** The diameter of the hole for the motor's shaft to pass through.
*   **Outlet Length:** The length of the outlet, ideally as a multiplier of the fan radius.
*  **Cap Ridge Tolerance:**  A tolerance value for fitting the cap to the housing, for easier printing.

**Mounting Holes:**

*   **Number of Holes:** Ability to specify the number of mounting holes.
*   **Hole Diameter:** The diameter of the mounting holes.
*  **Hole Boss Offset:** The offset of the boss around the mounting holes.

**Cap Design:**

*   **Cap Thickness:** The thickness of the cap.
*   **Cap Inlet Diameter:** The outer diameter of the inlet hole in the cap.
*   **Cap Boss Offset:** The offset of the boss around the inlet hole.
*   **Cap Adapter Height:**  The height of the inlet tube.

**Outlet Adapter:**

*   **Adapter On/Off:** Toggle the outlet adapter on or off.
*   **Adapter Type:** Select between a tube, airhose, or square outlet adapter (only tube is required initially).
*   **Outlet Fitting Tolerance:**  Control the undersizing of the outlet for fitting.
*   **Adapter Male Length:** The depth of the adapter into the housing's outlet.
*  **Adapter Link:** The thickness of the adapter where it connects to the outlet's lip.
*   **Tube Outlet Dimensions:** The outer and inner diameters and length of the tube outlet.

**View Options:**

*   **View Mode:** I want a few modes: an "all" mode to show all parts laid out, and individual modes to view just the impeller, housing, cap, or adapter. There should also be an "assembled" mode that shows the pieces together.
*   **Part Visibility:** Toggles to control the visibility of the impeller, housing, cap, and adapter.

The overall design should be modular enough that each section can be adjusted independently. I'd like to use the standard OpenSCAD library, and no additional libraries are needed. It'd be ideal if the code is well-commented, making it easier to understand.

[Assistant]
ImpellerUpload_V5.scad:
```
// preview[view:north east, tilt:top diagonal]

////////////////////////////////////////////////////////////////////////////
/* [Impeller Blade Settings] */

// BLADE SETTINGS //

// how many blades
numBlades = 7;
// thickness of the blades
bladeGirth = 3;
// height of blades
bladeHeight = 13;
// type of blades used
bladeType = "curved"; // [straight,curved]
// curved blade curvature
bladeCurvature = 0.6;
// blade direction (doesn't affect straight blades)
bladeDirection = "CCW"; // [CW,CCW]
// angle of twist for the curved blade setting
twistAngle = 15;
// resolution of the curved blades
sliceRes = 5;
// thickness of the base of the impeller
baseGirth = 2;

// IMPELLER BODY //

// diameter of the main fan/impeller
fanDiameter = 45;
// shape of the shaft hole profile
shaftShape = "smooth"; // [smooth,hex,D]
// diameter of the shaft hole for attaching a motor
shaftDiameter = 2;
// type of impeller air intake cutout
cutoutType = "cone"; // [cylinder,cone]
// angle of cone cutout
coneAngle = 40; // [1:89]
// offset width of the boss surrounding the shaft hole
shaftBossOffset = 3;
// height of the boss
bossHeight = 6;
// D-shaft profile, sets the position of the flat edge
DcutRatio = 0.6;

// impeller calculations
coneMod = (bladeHeight*tan(coneAngle))/2;
shaftRadius = shaftDiameter/2;
fanRadius = fanDiameter/2;
shaftBossDiameter = shaftBossOffset + shaftDiameter;
shaftBossRadius = shaftBossDiameter/2;

// cutting profile distance for D shaft profile
DcutDist = shaftRadius*(1 - DcutRatio);

// curved blade cutout radius
bladeRadius = fanRadius * bladeCurvature;

// thickness of curved blades
curvedBladeThickness = bladeGirth / 1.42;

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

/* [Housing Settings] */

// HOUSING BODY AND SIZING //
// impellerOD and housingID spacing
housingOffsetDiameter = 3;
// Z spacing from fans to cap
housingOffsetHeight = 4;
// thickness of the housing walls
housingWallThickness = 2;

// DC MOTOR HOUSING //
// DC motor mount ID
DCmotorID = 25;
// motor mount OD
DCmotorOD = 29;
// height of the motor mount, set to 0 to remove, otherwise it is located underneath the housing
motorMountHeight = 0;
// housing motor shaft diameter
MotorDiameter = 6;

// OUTLET //
// outlet Length in radius's
outletLengthMultiplier = 1.5;
// ridge tolerance for fitting the cap
ridgeTolerance = 0.25;

// Radius calculations
DCmotorIDr = DCmotorID/2;
DCmotorODr = DCmotorOD/2;

// housing calculations
// calculations for the output

// outlet outer length
outletLength = fanRadius*outletLengthMultiplier;

// housing ID
housingID = fanDiameter + housingOffsetDiameter;
housingOD = housingID + housingWallThickness;
housingHeight = (bladeHeight + baseGirth + housingOffsetHeight);
outletCut = housingHeight - (2*baseGirth);

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

/* [Mounting Holes Settings] */

// how many mounting holes
numHoles = 2; // [0,2,4]
// diameter of the mounting holes
holeDiameter = 3;
// Mounting holes boss OD
holeBossOffset = 3;

// mounting holes calculations
holeBossDiameter = holeDiameter + holeBossOffset;
holeBossRadius = holeBossDiameter/2;
holeRadius = holeDiameter/2;

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

/* [Cap Inlet Settings] */

// thickness of cap
capThickness = 1.5;
// Inlet OD
capHoleDiameter = 6.6;
// Inlet ID offset
capBossOffset = 2;
// height of inlet
capAdapterHeight = 7.5;

// cap calculations
capBossDiameter = capHoleDiameter + capBossOffset;

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

/* [Outlet Adapter Settings] */

// Turn outlet Adapter ON/OFF
outletAdpaterON = "true"; // [true,false]
// outlet type
outletAdpaterType = "tube"; // [tube,airhose,square]
// undersizing of outlet housing for fitting tolerances
outletFittingTolerance = 0.3;
// depth of adapter to housing outlet fitting
outletAdpaterMaleLength = 3;
// thickness of adapter on the housing lip
outletAdapterLink = 2;
// converted outlet's OD
outletTubeOD = 8;
// converted outlet's ID
outletTubeID = 6;
// converted outlet's length
outletTubeLength = 7;

////////////////////////////////////////////////////////////////////////////
/* [View Settings] */

// view mode, all places parts in single print mode, assembled puts the components together
viewObject = "all"; // [impeller,housing,cap,adapter,all,assembled]

viewAdapter = "true"; // [true,false]
viewImpeller = "true"; // [true,false]
viewHousing = "true"; // [true,false]
viewCap = "true"; // [true,false]

/* [Hidden] */
$fn = 40;

module Dshaft(height) {
	intersection() {
		cylinder(h = height, r = shaftRadius, center = true);
		translate([DcutDist,0,0])
		cube([2*shaftRadius,2*shaftRadius,height],true);
	}
}

module impeller4() {
	difference() {
		union(){
			// impeller base
            cylinder(h = baseGirth,r = fanRadius, center = true);
            // impeller blades
            if (bladeType == "straight") {
	            for (i = [0:numBlades]) {
	                rotate([0,0,i*360/numBlades])
	                translate([fanRadius/2,0,(bladeHeight+baseGirth)/2])
	                cube([fanRadius,bladeGirth,bladeHeight],true);
	            }
	        } else if (bladeType == "curved") {
	        	for (i = [0:numBlades]) {
				rotate([0,0,i*360/numBlades])
				translate([0,0,baseGirth/2])
                curvedBlade2();
				}
	        }

            // impeller boss
            translate([0,0,(bladeGirth/2)])
            cylinder(h = bossHeight, r = shaftBossRadius, center = false);
		}

		union() {
			// air intake cutaway
			if (cutoutType == "cylinder") {
	            // translate([0,0,(bossHeight + baseGirth*1.5 + 0.01)])
	            translate([0,0,(bladeHeight - (bladeHeight - bossHeight)/2) + baseGirth/2])
            	cylinder(h = (bladeHeight - bossHeight)*1.01, r = shaftBossRadius, center = true);
            } else if (cutoutType == "cone") {
	            // translate([0,0,(bossHeight + baseGirth*1.5 + 0.01)])
	            translate([0,0,(bladeHeight - (bladeHeight - bossHeight)/2) + baseGirth/2])
            	cylinder(h = (bladeHeight - bossHeight)*1.01, r1 = shaftBossRadius, r2 = shaftBossRadius + coneMod, center = true);
            }

			// shaft cutout
            // translate([0,0,0])
            if (shaftShape == "smooth") {
            	cylinder(h = (bladeHeight + baseGirth)*2.5, r = shaftRadius, center = true, $fn = 30);
            } else if (shaftShape == "hex") {
            	cylinder(h = (bladeHeight + baseGirth)*2.5, r = shaftRadius, center = true, $fn = 6);
            } else if (shaftShape == "D") {
            	Dshaft((bladeHeight + baseGirth)*2.5);
            }
		}
	}
}

module curvedBlade2() {
    linear_extrude(height = bladeHeight, twist = twistAngle, slices = sliceRes)
    // blades
    difference() {
        // blade base
        translate([(bladeRadius - (shaftRadius/2)),0,0])
        circle(r = bladeRadius, center = true);

        // blade cutout and cleanup
        union() {
            // main blade shape
            translate([(bladeRadius - (shaftRadius/2)) + curvedBladeThickness,-curvedBladeThickness,0])
            circle(r = bladeRadius, center = true);

            // bottom of blade cube cutout
            translate([0,-fanRadius,0])
            square(fanRadius*2,true);

            // cylindrical cutout for blades hanging off the main base
            difference() {
                // OD
                circle(r = fanRadius*5, center = true);

                // ID
                circle(r = fanRadius, center = true);
            }
        }
    }
}

module Housing1() {

    difference() {
        union() {
            // makes the outer cylinder
            cylinder(h = housingHeight, r = housingOD/2, center = true);

            // makes the outlet block
            translate([(housingOD - housingHeight)/2,outletLength/2,0])
            cube([housingHeight,outletLength,housingHeight],true);

            // makes the mounting holes
            for (i = [0:numHoles]) {
                rotate([0,0,i*360/numHoles])
                translate([-(housingOD/2 + holeBossRadius),0,0])
                mountingHole(housingHeight);
            }
            translate([0,0,-(housingHeight + motorMountHeight)/2])
                difference() {
                    // motor mount
                    cylinder(h = motorMountHeight, r = DCmotorODr, center = true);

                    translate([0,0,-0.01])
                    cylinder(h = motorMountHeight, r = DCmotorIDr, center = true);
                }

            // outlet ridge
            // will likely require a tolerance fit here as well

            translate([0,0,housingHeight/2])
                difference() {
                    // the block the ridge will be cut into
                    translate([(housingOD - housingHeight)/2,(outletLength) - fanRadius/2,0])
                        cube([housingHeight,fanRadius,capThickness],true);

                    // the cylinder that'll cut the ridge
                    cylinder(h = capThickness*1.1, r = (housingOD/2) + ridgeTolerance, center = true);
                }
        }

        union() {
            // housing inner ID cutout
            translate([0,0,baseGirth])
            cylinder(h = housingHeight, r = housingID/2, center = true);

            // motor mount cutout
            cylinder(h = housingHeight*2, r = MotorDiameter/2, center = true);

            // outlet ID cutout
            translate([(housingID - outletCut - housingWallThickness)/2,(outletLength/2) + 0.01,0])
            cube([outletCut,outletLength,outletCut],true);
        }
    }
}

module mountingHole(mountingHeight) {
    $fn = 20;
    difference() {
        union() {
            cylinder(h = mountingHeight, r = holeBossRadius, center = true);
            translate([holeBossRadius,0,0])
                cube([holeBossDiameter,holeBossDiameter,mountingHeight],true);
        }
        union() {
            cylinder(h = mountingHeight*1.01, r = holeRadius, center = true);
        }
    }
}

module cap() {

    difference() {
        union() {
            // base of the cap
            cylinder(h = capThickness, r = housingOD/2, center = true);

            // tubing adapter on cap
            translate([0,0,abs(capAdapterHeight + capThickness)/2])
            cylinder(h = capAdapterHeight, r = capBossDiameter/2, center = true);

            // mounting holes
            for (i = [0:numHoles]) {
                rotate([0,0,i*360/numHoles])
                translate([-(housingOD/2 + holeBossRadius),0,0])
                mountingHole(capThickness);
            }
        }

        union() {
            cylinder(h = (capThickness + capAdapterHeight)*2, r = capHoleDiameter/2, center = true);
        }
    }
}

module adapterBase() {
    // builds the base for mounting adapter types to the outlet
    union() {
        // builds the inner male portion of the outlet
        cube([outletCut - outletFittingTolerance,outletAdpaterMaleLength,outletCut - outletFittingTolerance],true);

        // builds the lip for the outlet adapter
        // translates to fit over the insideMaleConnection
        translate([0,(outletAdpaterMaleLength + outletAdapterLink)/2,0])
        cube([housingHeight,outletAdapterLink,housingHeight],true);
    }
}

module adapter() {
	//
    if (outletAdpaterON == "true") {
        difference() {
            union() {
                // applies a base
                adapterBase();

                // setting the stage for placing adapaters
                rotate([90,0,0])

                // builds the adapter types
                translate([0,0,-(outletAdpaterMaleLength + outletTubeLength)/2 - outletAdapterLink])
                if (outletAdpaterType == "tube") {
                    // makes the tube's OD
                    cylinder(h = outletTubeLength, r = outletTubeOD/2, center = true);
                } else if (outletAdpaterType == "square") {
                    // make new square adapter
                }
            }

            union() {
                rotate([90,0,0])
                cylinder(h = (outletAdpaterMaleLength + outletTubeLength + outletAdapterLink)*2, r = outletTubeID/2, center = true);
            }

        }
    }
}

if (viewObject == "all") {
    if (viewHousing == "true") {
        translate([(housingOD/2 + fanRadius) + (holeBossDiameter * 1.5),0,baseGirth/2])
        if (bladeDirection == "CCW") {
        	impeller4();
        } else if (bladeDirection =="CW") {
        	mirror([0,1,0])
        	impeller4();
        }
    }

    if (viewCap == "true") {
        translate([0,-((housingOD/2 + fanRadius) + (holeBossDiameter * 3)),capThickness/2])
        cap();
    }

    if (viewHousing == "true") {
        translate([0,0,(housingHeight/2) + motorMountHeight])
        Housing1();
    }

    if (viewAdapter == "true") {
        rotate([90,0,0])
        translate([housingOD,outletAdpaterMaleLength/2,housingOD*.8])
        adapter();
    }

} else if (viewObject == "impeller") {
    // impeller3();
    if (bladeDirection == "CCW") {
    	impeller4();
    } else if (bladeDirection =="CW") {
    	mirror([0,1,0])
    	impeller4();
    }
} else if (viewObject == "housing") {
    Housing1();
} else if (viewObject == "cap") {
    cap();
} else if (viewObject == "adapter") {
    // rotate([90,0,0])
    adapter();
} else if (viewObject == "assembled") {
    if (viewImpeller == "true") {
        translate([0,0,-((housingHeight/2) - 1.5*baseGirth)])
        if (bladeDirection == "CCW") {
        	impeller4();
        } else if (bladeDirection =="CW") {
        	mirror([0,1,0])
        	impeller4();
        }
    }

    if (viewCap == "true") {
        %translate([0,0,(housingHeight + capThickness)/2])
        cap();
    }

    if (viewHousing == "true") {
        %Housing1();
    }

    if (viewAdapter == "true") {
        translate([-(housingHeight - housingOD)/2,(outletLength - outletAdpaterMaleLength/2),0])
        adapter();
    }
}

```


[User]
Hey! I'm trying to design a customizable 3D printed ruler with my name on it, and I'd love some help generating the OpenSCAD code for it.

Basically, I want a ruler that has the following:

*   **Customizable Text:** I need to be able to input text (my name, for example) that appears on the ruler. This should be configurable in terms of position, font size, height of the text (how thick it extrudes), and the spacing between characters.
*   **Ruler Length:**  The overall length of the ruler should be adjustable.
*  **Text Placement and Style**:  I want to be able to set the X and Y coordinates of the text. The text should also have a thickness (textHeight). The spacing between the letters can be adjusted as well.
*   **Number Markers:** The ruler needs numbered markers at centimeter intervals along the length of the ruler. The size of these numbers and their distance from the edge of the ruler should be configurable.
*   **Unit Label:** A "cm" label needs to be on the ruler as well.
*   **Ruler Body:** The ruler should have a solid body, with a sloped edge for a little bit of style. It should have a hole for a keyring as well.
*   **Imprint on the back**: There should be a separate text imprint on the back.
*   **Marker Lines**: There should be short lines at each cm mark.

The design should use the `write.scad` library to handle the text, and should be fully parametric so I can adjust all those things. Can you help with this?

[Assistant]
nameruler-update1.scad:
```
// 3D Name Ruler
// by RyanPetroff for Maker Academy
// Free as in Freedom! CC-BY-SA
// Official page: http://www.thingiverse.com/thing:1599421
// This is a remix of customizable ruler by Stu121, CC-BY-SA, http://www.thingiverse.com/thing:109739

// Welcome to OpenSCAD!
// This will serve as an introduction to using code to generate 3D models. Code is basically a superpower.
// This code will help you generate a ruler with your name on it!
// All you need to do is put in your name and choose a fitting font size. Easy!

// Writescad allows us to use text!
// Doubled to allow Thingiverse Customizer and OpenSCAD compatibility, respectively
use<write/Write.scad>
use<Write.scad>

/* [Beginner] */

// What is your name?
RulerText="Your Name Here!";
// Full names don't always fit. First names are great!
FontSize=8; //[7:0.5:11.5]

/* [Advanced] */

// Things we usually keep the same for our class prints
RulerLength=10;// [1:30]
TextX=12;
TextY=18;
TextHeight=1;
TextSpacing=1.15;
NumberSize=8;//[1:15]
NumberOffset=1;//[0:3]

{
// First let's generate all the text on our ruler

// Apply our name
translate([TextX,TextY,TextHeight])  write(RulerText,h=FontSize,t=2,space=TextSpacing);

// Generate the marker numbers
for (i=[1:1:RulerLength]){
if (i > 9){
translate([(i*10)-2+NumberOffset,5.5,1]) write(str(i),h=NumberSize,t=2);
}
else
translate([(i*10)+NumberOffset,5.5,1]) write(str(i),h=NumberSize,t=2);
}
// Make sure everyone knows this is a metric ruler in centimetres
translate([0.3,5.5,1]) write("cm",h=8,t=2);
// Yes, lowercase cm is correct.
}

{
    // Now we'll build the rest of the ruler.

difference(){

    //This is the body of the ruler. To get the sloped edge...
hull(){
    // We stretch a hull over a large prism...
translate([0,5,0]) cube([(RulerLength*10)+10,25,2.5]);
    // and a small prism.
translate([0,-5,0])  cube([(RulerLength*10)+10,1,1]);
}
// This is the hole for a keyring.
translate([6,24,0]) cylinder(h = 10, r=3, center = true, $fn=100);

 // Apply our imprint to the back
translate([105,8,1]) rotate([0,180,0])  write("Maker Academy",h=9.5,t=2,space=1.2);
// You can comment this out if it is causing printing problems, otherwise please leave it in.
{
// Future! Ssshhh.
// translate([107,8,1]) rotate([0,180,0])  write("MakerAcademy.XYZ",h=8,t=2,space=1.2);
}
}

// Marker lines
for (i=[0:10:RulerLength*10]){
translate([i+3,-4.9,0.5]) rotate([8.5,0,0]) cube([1,10,1.5]);
}
}

// That's it! We made the 3D Name Ruler!
// Hurray!
// Think about all the other infinite things we could make with code!
```


[User]
I need a parametric design for a holder for a puzzle cube. I've seen a few designs out there, but I want to be able to customize it more precisely for my printer's specific settings. Basically, it's a box with the top open, and some cutouts on the sides to make it a bit more interesting and save on filament.

Here are the basic parameters I'd like to control:

*   `contentCubeEdge`: This is the size of the cube that will fit inside the holder.
*   `tolerance`: The extra space between the cube and the inner wall of the holder. This needs to be adjustable based on how much my printer tends to squish the plastic.
*   `edgeThickness`: The thickness of the material used for the holder itself. This is partly for strength, and partly for print time.
*   `edgeHoleRatio`: The ratio of the cutout size to the inner edge of the box. This will determine how big the holes in the sides are.

The overall structure should be a cube-shaped box with an open top. I want five square cutouts, one on each side except the bottom. These cutouts should be centered on each face, and their size should be based on the `edgeHoleRatio`.

I'm thinking I want the design to be in a single `.scad` file. And I'd like it if you could use the MCAD library, please.

[Assistant]
CubePuzzleHolder.scad:
```
contentCubeEdge = 30;
tolerance = 0.4;
edgeThickness = 0.8;
edgeHoleRatio = 0.6;

boxEdgeOuter = contentCubeEdge+2*tolerance+2*edgeThickness;
boxEdgeInner = boxEdgeOuter - 2*edgeThickness;
cutoutEdge = boxEdgeInner*edgeHoleRatio;

difference() {
    cube([boxEdgeOuter,boxEdgeOuter,boxEdgeOuter],center=true);
    translate([0,0,edgeThickness])
    cube([boxEdgeInner,boxEdgeInner,boxEdgeInner+edgeThickness],center=true);
    translate([0,0,-boxEdgeOuter/2])
    cube([cutoutEdge,cutoutEdge,cutoutEdge],center=true);
    translate([0,-boxEdgeOuter/2,0])
    cube([cutoutEdge,cutoutEdge,cutoutEdge],center=true);
    translate([0,boxEdgeOuter/2,0])
    cube([cutoutEdge,cutoutEdge,cutoutEdge],center=true);
    translate([-boxEdgeOuter/2,0,0])
    cube([cutoutEdge,cutoutEdge,cutoutEdge],center=true);
    translate([boxEdgeOuter/2,0,0])
    cube([cutoutEdge,cutoutEdge,cutoutEdge],center=true);
}
```


[User]
Hey, I'm looking for an OpenSCAD design for a customizable clip for IKEA SAMLA boxes. I've seen some cool ones online, and I'd like to make my own that I can adjust for different boxes and add my own text.

Specifically, I need the following features:

*   **Adjustable Length:** The clip should have a parameter called `length` that lets me set its overall length in millimeters. I'd like to be able to set this to something between 20 and 100mm.
*   **Text Embossing:** I'd also like to be able to emboss some text onto the clip. It needs parameters for `text` (the text itself) and `font` (the font to use). I want to choose from "BlackRose.dxf", "braille.dxf", "knewave.dxf", "Letters.dxf", and "orbitron.dxf". I also want a `fontsize` parameter that lets me set the size of the font between 6 and 24.
*   **Functionality:** The clip should be designed to securely clip onto an IKEA SAMLA box, with inner and outer hooks. The current design has some specific dimensions for the hooks and the bevels, which I want to keep. These include things like `thickness`, `in_width`, `in_height`, `out_hook_length`, `in_hook_length`, `in_hook_offset`, `in_big_radius`, `in_small_radius`, and `logo_height`. I'd like all of these to be set as internal variables that I don't normally have to worry about. I expect these to have the values: 2, 19, 12.5, 7, 5, 4, 7, 1, and 2 respectively.
*   **Internal Hole:** The design also has a hole in the inner hook if the `length` is greater than or equal to 40mm. This is important for fitting over the ribs of the box, so I'd like that included.

The design should also use some helper functions similar to `bevel`, `attach`, and `connector` from the obiscad library.  I don't expect you to use the library directly, but rather create equivalent functions for use in this project. I'll need the `Write.scad` library to handle the font files.

Could you please generate the OpenSCAD code for this? I'd really appreciate it!

[Assistant]
samla-locking-clip-customizable.scad:
```
/**
 * A locking clip for IKEA SAMLA boxes.
 * Copyright (C) 2013 Roland Hieber <rohieb+ikeasamlaclip@rohieb.name>
 *
 * Adapted for Thingiverse customiser by Greg Tan <greg@gregtan.com>.
 * Contains parts of the obiscad library (https://github.com/Obijuan/obiscad/)
 * inine as customiser can only use a single file.
 *
 * The contents of this file are licenced under CC-BY-NC-SA 3.0 Unported.
 * See https://creativecommons.org/licenses/by-nc-sa/3.0/deed for the
 * licensing terms.
 */

// preview[view:south west, tilt:side]

// How long should the clip be (in mm)?
length = 40; // [20:100]

// What text should be ebmossed on the clip?
text = "My stuff";

// What font should be used?
font = "orbitron.dxf"; // [BlackRose.dxf:Black Rose, braille.dxf:Braille, knewave.dxf:Knewave, Letters.dxf:Letters, orbitron.dxf:Orbitron]

// How large should the font be?
fontsize = 12; //[6:24]

/* [Hidden] */

thickness = 2; // wall thickness
in_width = 19; // inside dimension on y axis
in_height = 12.5; // inside dimension on x axis
out_hook_length = 7; // length of outer hook segment
in_hook_length = out_hook_length-thickness; // length of inner hook segment
in_hook_offset = 4; // offset of inner hook segment on the y axis
in_big_radius = 7; // radius of the big beveled edge
in_small_radius = 1; // radius of the small beveled edges
logo_height = 2; // extrusion height of the logo

// Create the clip
ikea_samla_clip_with_text(length = length, text=text, font=font, fontsize=fontsize/2);

use <write/Write.scad>

/* [Global] */

/**
 * A locking clip for IKEA SAMLA boxes.
 * Parameters:
 * length: Length of the clip. Default is 40 mm.
 */
module ikea_samla_clip(length=40) {
	$fn=50;

	// inside bevel connectors
	ci1e = [[0,0,length/2], [0,0,1], 0];
	ci1n = [ci1e[0], [-1,-1,0], 0];
	*connector(ci1e);
	*connector(ci1n);
	ci2e = [[0,in_width,length/2], [0,0,1], 0];
	ci2n = [ci2e[0], [-1,1,0], 0];
	*connector(ci2e);
	*connector(ci2n);
	ci3e = [[in_height,0,length/2], [0,0,1], 0];
	ci3n = [ci3e[0],[1,-1,0],0];
	*connector(ci3e);
	*connector(ci3n);
	ci4e = [[in_height,in_hook_offset,length/2], [0,0,1], 0];
	ci4n = [ci4e[0], [1,1,0], 0];
	*connector(ci4e);
	*connector(ci4n);

	// outside bevel connectors
	co1e = [[-thickness,-thickness,length/2], [0,0,1], 0];
	co1n = ci1n;
	*connector(co1e);
	*connector(co1n);
	co2e = [[-thickness,in_width+thickness,length/2], [0,0,1], 0];
	co2n = ci2n;
	*connector(co2e);
	*connector(co2n);
	co3e = [[in_height+thickness,-thickness,length/2], [0,0,1], 0];
	co3n = ci3n;
	*connector(co3e);
	*connector(co3n);
	co4e = [[in_height+thickness,in_hook_offset+thickness,length/2], [0,0,1], 0];
	co4n = ci4n;
	*connector(co4e);
	*connector(co4n);

	// bevel connectors for hole in inner hook
	cihhle = [[in_height-in_hook_length/2,in_hook_offset+thickness/2,length/5],
		[0,1,0], 0];
	cihhln = [cihhle[0], [1,0,-1], 0];
	*connector(cihhle);
	*connector(cihhln);
	cihhue = [[cihhle[0][0],cihhle[0][1],4*length/5], [0,1,0], 0];
	cihhun = [cihhue[0], [1,0,1], 0];
	*connector(cihhue);
	*connector(cihhun);

	difference() {
		// outer edge
		translate([-thickness, -thickness, 0])
			cube([in_height+2*thickness, in_width+2*thickness, length]);
		bevel(co1e, co1n, l=length+1, cr=in_big_radius+thickness, cres=$fn/4);
		bevel(co2e, co2n, l=length+1, cr=in_small_radius+thickness, cres=$fn/4);
		bevel(co3e, co3n, l=length+1, cr=in_small_radius+thickness, cres=$fn/4);
		bevel(co4e, co4n, l=length+1, cr=in_small_radius+thickness, cres=$fn/4);

		// inner edge
		difference() {
			cube([in_height, in_width, length+1]);
			bevel(ci1e, ci1n, l=length+1, cr=in_big_radius, cres=$fn/4);
			bevel(ci2e, ci2n, l=length+1, cr=in_small_radius, cres=$fn/4);
			bevel(ci3e, ci3n, l=length+1, cr=in_small_radius, cres=$fn/4);
			bevel(ci4e, ci4n, l=length+1, cr=in_small_radius, cres=$fn/4);

			// inner, upward hook
			difference() {
				translate([in_height-in_hook_length, in_hook_offset, 0])
					cube([in_hook_length, thickness, length]);
			}
		}

		// shorten the outer hook
		translate([out_hook_length, in_hook_offset+thickness, 0])
			cube([in_height, in_width, length+1]);

		// add a hole in the inner hook for the cross ribs under the boxes' rim
		if(length >= 40) {
			difference() {
				translate([in_height-in_hook_length, in_hook_offset, length/5])
					cube([in_hook_length/2, thickness, length/5*3]);
				bevel(cihhle, cihhln, l=thickness, cr=in_hook_length/2, cres=0);
				bevel(cihhue, cihhun, l=thickness, cr=in_hook_length/2, cres=0);
			}
		}
	}
}

/**
 * A locking clip for IKEA SAMLA boxes with text.
 * Parameters:
 * length: Length of the clip. Default is 40mm.
 * text: Text that is rendered on the clip
 * font: DXF font file for Write.scad
 * fontsize: font size of the text
 */
module ikea_samla_clip_with_text(length=40, text="stuff", font="write/orbitron.dxf", fontsize=19/2) {
	ikea_samla_clip(length=length);
	translate([-thickness, in_width-in_big_radius, length/2])
		rotate([0,-90,0])
		write(text, center=true, font=str("write/", font), h=fontsize, t=2*0.7);
}

/**
 * A locking clip for IKEA SAMLA boxes with logo.
 * Parameters:
 * length: Length of the clip. Default is 40mm.
 * logo: Path to a DXF file that is rendered as a logo on the clip. Logos should
 *  be 50mm×50mm to be rendered correctly. For a collection of logos, see
 *  https://github.com/rohieb/thing-logos
 */
module ikea_samla_clip_with_logo(length=40,
	logo="thing-logos/stratum0-lowres.dxf") {
	ikea_samla_clip(length=length);
	translate([-thickness, in_big_radius, length/2])
		scale((in_width-in_big_radius-thickness)/50)
		translate([-logo_height/2, 50, -25])
		rotate([90,0,-90])
		linear_extrude(height=logo_height, center=true)
		import(logo, center=true);
}

// Modules copied from ObiScad library as customiser doesn't allow library usage

// inline bevel.scad
//---------------------------------------------------------------
//-- Openscad Bevel library
//-- Bevel the edges or add buttress to your parts!
//---------------------------------------------------------------
//-- This is a component of the obiscad opescad tools by Obijuan
//-- (C) Juan Gonzalez-Gomez (Obijuan)
//-- Sep-2012
//---------------------------------------------------------------
//-- Released under the GPL license
//---------------------------------------------------------------

//-----------------------------------------------------------------
//- Rotate a vector an angle teta around the axis given by the
//-- unit vector k
//-----------------------------------------------------------------
function Rot_axis_ang(p,k,teta) =
  p*cos(teta) + cross(k,p*sin(teta)) + k*dot(k,p)*(1-cos(teta));

//-- Transformation defined by rotating vfrom vector to vto
//-- It is applied to vector v
//-- It returns the transformed vector
function Tovector(vfrom, vto, v) =
   Rot_axis_ang(v, unitv(cross(vfrom,vto)), anglev(vfrom,vto));

//-- Auxiliary function for extending a vector of 3 components to 4
function ev(v,c=0) = [v[0], v[1], v[2], c];

//-- Calculate the determinant of a matrix given by 3 row vectors
function det(a,b,c) =
   a[0]*(b[1]*c[2]-b[2]*c[1])
 - a[1]*(b[0]*c[2]-b[2]*c[0])
 + a[2]*(b[0]*c[1]-b[1]*c[0]);

//-- Sign function. It only returns 2 values: -1 when x is negative,
//-- or 1 when x=0 or x>0
function sign2(x) = sign(x)+1 - abs(sign(x));

//--------------------------------------------------------------------
//-- Beveled concave corner
//-- NOT AN INTERFACE MODULE (The user should call bconcave_corner instead)
//--
//-- Parameters:
//--   * cr: Corner radius
//--   * cres: Corner resolution
//--   * l: Length
//-    * th: Thickness
//--------------------------------------------------------------------
module bconcave_corner_aux(cr,cres,l,th)
{

  //-- vector for translating the  main cube
  //-- so that the top rigth corner is on the origin
  v1 = -[(cr+th)/2, (cr+th)/2, 0];

  //-- The part frame of reference is on the
  //-- internal corner
  v2 = [cr,cr,0];

  //-- Locate the frame of ref. in the internal
  //-- corner
  translate(v2)
  difference() {

    //-- Main cube for doing the corner
    translate(v1)
        //color("yellow",0.5)
        cube([cr+th, cr+th, l],center=true);

    //-- Cylinder used for beveling...
    cylinder(r=cr, h=l+1, center=true, $fn=4*(cres+1));
  }
}

//-----------------------------------------------------------------------------
//-- API MODULE
//--
//-- Beveled concave corner
//--
//-- Parameters:
//--   * cr: Corner radius
//--   * cres: Corner resolution
//--   * l: Length
//-    * th: Thickness
//--   * ext_corner: Where the origin is locate. By default it is located
//--       in the internal corner (concave zone). If true,
//--       it will be in the external corner (convex zone)
//----------------------------------------------------------------------------
module bconcave_corner(cr=1,cres=4,th=1,l=10,ext_corner=false)
{
  //-- Locate the origin in the exterior edge
  if (ext_corner==true)
    translate([th,th,0])
      bconcave_corner_aux(cr,cres,l,th);
  else
     //-- Locate the origin in the interior edge
     translate([0.01, 0.01,0])
       bconcave_corner_aux(cr,cres,l,th);
}

//----------------------------------------------------------------------
//-- Auxiliary module (NOT FOR THE USER!)
//-- It is and standar "attach", particularized for placing concave
//-- corners
//----------------------------------------------------------------------
module bconcave_corner_attach_final(
        cfrom,  //-- Origin connector
        cto,    //-- Target connector
        cr,
        cres,
        l,
        th,
        ext_corner)
{

  //-- This block represent an attach operation
  //-- It is equivalent to:  attach(cto,cfrom)
  translate(cto[0])
    rotate(a=cto[2], v=cto[1])
      rotate(a=anglev(cfrom[1],cto[1]),
             v=cross(cfrom[1],cto[1]) )
        translate(-cfrom[0])

  //-- Place the concave corner (along with some debug information)
  union() {
    //color("Blue")
    //connector(cfrom);
    //connector([cfrom[0],cnormal_v,0]);
    bconcave_corner(cr=cr,
             cres=cres,
             l=l,
             th=th,
             ext_corner=ext_corner);
  }
}

//-------------------------------------------------------------------------
//-- Auxiliary module (NOT FOR THE USER!)
//-- It is the general module for performing the bconcave corner attach
//-- All the parameters should be passed to it
//--
//--  External connectors are where de concave corner will be placed. They
//--  are provided by the user
//--
//--  Internal connectors refers to the connectors of the concave corner
//--
//--  Then an attach between the internal and external connectors is done
//-------------------------------------------------------------------------
module bconcave_corner_attach_aux(

         //-- External connectors
         edge_c,
         normal_c,

         //-- Internal connectors
         iedge_c,
         inormal_c,

	 //-- Other params
         cr,
         cres,
         th,
         l,
         ext_corner)

{
  //-- Get the Corner vectors from the internal connectors
  cedge_v = iedge_c[1];         //-- Corner edge vector
  cnormal_v = inormal_c[1];     //-- Corner normal vector

  //-- Get the vector paralell and normal to the edge
  //-- From the external connectors
  edge_v = edge_c[1];      //-- Edge verctor
  enormal_v = normal_c[1]; //-- Edge normal vector

  //---------------------------------------------------------------
  //-- For doing a correct attach, first the roll angle for the
  //-- external connector should be calculated. It determines the
  //-- orientation of the concave corner around the edge vector
  //--
  //-- This orientation is calculated using the edge normal vectors
  //-- that bisec the corner
  //--
  //-- There are 2 different cases: depending on the relative angle
  //-- between the internal and external edges. They can be parallel
  //-- or not
  //-----------------------------------------------------------------
  //-- The roll angle has two components: the value and the sign

  //-- Calculate the sign of the rotation (the sign of roll)
  s=sign2(det(cnormal_v,enormal_v,edge_v));

  //-- Calculate the roll when the edges are paralell
  rollp = s*anglev(cnormal_v, enormal_v);

  //-- Calculate the roll in the general case
  Tcnormal_v = Tovector(cedge_v, edge_v, cnormal_v);
  rollg=s*anglev(Tcnormal_v, enormal_v);

  //-- For the paralell case... use rollp
  if (mod(cross(cedge_v,edge_v))==0) {
    //echo("Paralell");

     //-- Place the concave bevel corner!
     bconcave_corner_attach_final(
       cfrom = [[0,0,0],   cedge_v,   0],
       cto   = [edge_c[0], edge_c[1], rollp],
       cr    = cr,
       cres  = cres,
       l     = l,
       th    = th,
       ext_corner = ext_corner);
  }

  //-- For the general case, use rollg
  else {
    //echo("not paralell");

     //-- Place the concave bevel corner!
     bconcave_corner_attach_final(
       cfrom = [[0,0,0],   cedge_v,   0],
       cto   = [edge_c[0], edge_c[1], rollg],
       cr    = cr,
       cres  = cres,
       l     = l,
       th    = th,
       ext_corner = ext_corner);
  }
}

//---------------------------------------------------------------------------
//-- API MODULE
//--
//--  Bevel an edge. A concave corner is located so that the calling
//--  module can easily perform a difference() operation
//--
//--  Two connectors are needed:
//--    * edge_c   : Connector located on the edge, paralell to the edge
//--    * normal_c : Connector located on the same point than edge_c
//--                 pointing to the internal corner part, in the direction
//--                 of the corner bisector
//--    * cr        : Corner radius
//--    * cres      : Corner resolution
//--    * l         : Corner length
//--------------------------------------------------------------------------
module bevel(
           edge_c,
           normal_c,
           cr=3,
           cres=3,
           l=5)
{

  //-- Call the general module with the correct internal connectors
  bconcave_corner_attach_aux(

         //-- External connectors
         edge_c   = edge_c,
         normal_c = normal_c,

	 //-- Internal connectors
         iedge_c   = [[0,0,0], unitv([0,0,1]), 0],
         inormal_c = [[0,0,0], [-1,-1,0]       , 0],

         //-- The other params
         cr=cr,
         cres=cres,
         l=l,
         th=1,
         ext_corner=false);
}

//---------------------------------------------------------------------------
//-- API MODULE
//--
//--  Attach a Beveled concave corner
//--  Two connectors are needed:
//--    * edge_c   : Connector located on the edge, paralell to the edge
//--    * normal_c : Connector located on the same point than edge_c
//--                 pointing to the internal corner part, in the direction
//--                 of the corner bisector
//--    * cr        : Corner radius
//--    * cres      : Corner resolution
//--    * l         : Corner length
//--    * th        : Corner thickness (not visible when ext_corner=false)
//--    * ext_corner: If the exterior corner is used as a reference
//--------------------------------------------------------------------------
module bconcave_corner_attach(
           edge_c,
           normal_c,
           cr=3,
           cres=3,
           l=5,
           th=1,
           ext_corner=false)
{

  //-- Call the general module with the correct internal connectors
  bconcave_corner_attach_aux(

         //-- External connectors
         edge_c   = edge_c,
         normal_c = normal_c,

	 //-- Internal connectors
         iedge_c   = [[0,0,0], unitv([0,0,1]), 0],
         inormal_c = [[0,0,0], [1,1,0]       , 0],

         //-- The other params
         cr=cr,
         cres=cres,
         l=l,
         th=th,
         ext_corner=ext_corner);

}

// inline attach.scad
//--------------------------------------------------------------------
//-- Draw a connector
//-- A connector is defined a 3-tuple that consist of a point
//--- (the attachment point), and axis (the attachment axis) and
//--- an angle the connected part should be rotate around the
//--  attachment axis
//--
//--- Input parameters:
//--
//--  Connector c = [p , n, ang] where:
//--
//--     p : The attachment point
//--     v : The attachment axis
//--   ang : the angle
//--------------------------------------------------------------------
module connector(c)
{
  //-- Get the three components from the connector
  p = c[0];
  v = c[1];
  ang = c[2];

  //-- Draw the attachment poing
  color("Gray") point(p);

  //-- Draw the attachment axis vector (with a mark)
  translate(p)
    rotate(a=ang, v=v)
    color("Gray") vector(unitv(v)*6, l_arrow=2, mark=true);
}

//-------------------------------------------------------------------------
//--  ATTACH OPERATOR
//--  This operator applies the necesary transformations to the
//--  child (attachable part) so that it is attached to the main part
//--
//--  Parameters
//--    a -> Connector of the main part
//--    b -> Connector of the attachable part
//-------------------------------------------------------------------------
module attach(a,b)
{
  //-- Get the data from the connectors
  pos1 = a[0];  //-- Attachment point. Main part
  v    = a[1];  //-- Attachment axis. Main part
  roll = a[2];  //-- Rolling angle

  pos2 = b[0];  //-- Attachment point. Attachable part
  vref = b[1];  //-- Atachment axis. Attachable part
                //-- The rolling angle of the attachable part is not used

  //-------- Calculations for the "orientate operator"------
  //-- Calculate the rotation axis
  raxis = cross(vref,v);

  //-- Calculate the angle between the vectors
  ang = anglev(vref,v);
  //--------------------------------------------------------.-

  //-- Apply the transformations to the child ---------------------------

  //-- Place the attachable part on the main part attachment point
  translate(pos1)
    //-- Orientate operator. Apply the orientation so that
    //-- both attachment axis are paralell. Also apply the roll angle
    rotate(a=roll, v=v)  rotate(a=ang, v=raxis)
      //-- Attachable part to the origin
      translate(-pos2)
	child(0);
}

// inline vector.scad

//---------------------------------------------------------------
//-- Openscad vector library
//-- This is a component of the obiscad opescad tools by Obijuan
//-- (C) Juan Gonzalez-Gomez (Obijuan)
//-- Sep-2012
//---------------------------------------------------------------
//-- Released under the GPL license
//---------------------------------------------------------------

obiscad_drawing_resolution = 6;

//----------------------------------------
//-- FUNCTIONS FOR WORKING WITH VECTORS
//----------------------------------------

//-- Calculate the module of a vector
function mod(v) = (sqrt(v[0]*v[0]+v[1]*v[1]+v[2]*v[2]));

//-- Calculate the cros product of two vectors
function cross(u,v) = [
  u[1]*v[2] - v[1]*u[2],
  -(u[0]*v[2] - v[0]*u[2]) ,
  u[0]*v[1] - v[0]*u[1]];

//-- Calculate the dot product of two vectors
function dot(u,v) = u[0]*v[0]+u[1]*v[1]+u[2]*v[2];

//-- Return the unit vector of a vector
function unitv(v) = v/mod(v);

//-- Return the angle between two vectores
function anglev(u,v) = acos( dot(u,v) / (mod(u)*mod(v)) );

//----------------------------------------------------------
//--  Draw a point in the position given by the vector p
//----------------------------------------------------------
module point(p)
{
  translate(p)
    sphere(r=0.7,$fn=obiscad_drawing_resolution);
}

//------------------------------------------------------------------
//-- Draw a vector poiting to the z axis
//-- This is an auxiliary module for implementing the vector module
//--
//-- Parameters:
//--  l: total vector length (line + arrow)
//--  l_arrow: Vector arrow length
//--  mark: If true, a mark is draw in the vector head, for having
//--    a visual reference of the rolling angle
//------------------------------------------------------------------
module vectorz(l=10, l_arrow=4, mark=false)
{
  //-- vector body length (not including the arrow)
  lb = l - l_arrow;

  //-- The vector is locatead at 0,0,0
  translate([0,0,lb/2])
  union() {

    //-- Draw the arrow
    translate([0,0,lb/2])
      cylinder(r1=2/2, r2=0.2, h=l_arrow, $fn=obiscad_drawing_resolution);

    //-- Draw the mark
    if (mark) {
      translate([0,0,lb/2+l_arrow/2])
      translate([1,0,0])
        cube([2,0.3,l_arrow*0.8],center=true);
    }

    //-- Draw the body
    cylinder(r=1/2, h=lb, center=true, $fn=obiscad_drawing_resolution);
  }

  //-- Draw a sphere in the vector base
  sphere(r=1/2, $fn=obiscad_drawing_resolution);
}

//-----------------------------------------------------------------
//-- ORIENTATE OPERATOR
//--
//--  Orientate an object to the direction given by the vector v
//--  Parameters:
//--    v : Target orientation
//--    vref: Vector reference. It is the vector of the local frame
//--          of the object that want to be poiting in the direction
//--          of v
//--    roll: Rotation of the object around the v axis
//-------------------------------------------------------------------
module orientate(v,vref=[0,0,1], roll=0)
{
  //-- Calculate the rotation axis
  raxis = cross(vref,v);

  //-- Calculate the angle between the vectors
  ang = anglev(vref,v);

  //-- Rotate the child!
  rotate(a=roll, v=v)
    rotate(a=ang, v=raxis)
      child(0);
}

//---------------------------------------------------------------------------
//-- Draw a vector
//--
//-- There are two modes of drawing the vector
//-- * Mode 1: Given by a cartesian point(x,y,z). A vector from the origin
//--           to the end (x,y,z) is drawn. The l parameter (length) must
//--           be 0  (l=0)
//-- * Mode 2: Give by direction and length
//--           A vector of length l pointing to the direction given by
//--           v is drawn
//---------------------------------------------------------------------------
//-- Parameters:
//--  v: Vector cartesian coordinates
//--  l: total vector length (line + arrow)
//--  l_arrow: Vector arrow length
//    mark: If true, a mark is draw in the vector head, for having
//--    a visual reference of the rolling angle
//---------------------------------------------------------------------------
module vector(v,l=0, l_arrow=4, mark=false)
{
  //-- Get the vector length from the coordinates
  mod = mod(v);

  //-- The vector is very easy implemented by means of the orientate
  //-- operator:
  //--  orientate(v) vectorz(l=mod, l_arrow=l_arrow)
  //--  BUT... in OPENSCAD 2012.02.22 the recursion does not
  //--    not work, so that if the user use the orientate operator
  //--    on a vector, openscad will ignore it..
  //-- The solution at the moment (I hope the openscad developers
  //--  implement the recursion in the near future...)
  //--  is to repite the orientate operation in this module

  //---- SAME CALCULATIONS THAN THE ORIENTATE OPERATOR!
  //-- Calculate the rotation axis

  vref = [0,0,1];
  raxis = cross(vref,v);

  //-- Calculate the angle between the vectors
  ang = anglev(vref,v);

  //-- orientate the vector
  //-- Draw the vector. The vector length is given either
  //--- by the mod variable (when l=0) or by l (when l!=0)
  if (l==0)
    rotate(a=ang, v=raxis)
      vectorz(l=mod, l_arrow=l_arrow, mark=mark);
  else
    rotate(a=ang, v=raxis)
      vectorz(l=l, l_arrow=l_arrow, mark=mark);

}

//----------------------------------------------------
//-- Draw a Frame of reference
//-- Parameters:
//-- l: length of the Unit vectors
//-----------------------------------------------------
module frame(l=10, l_arrow=4)
{

  //-- Z unit vector
  color("Blue")
    vector([0,0,l], l_arrow=l_arrow);

  //-- X unit vector
  color("Red")
    vector([l,0,0], l_arrow=l_arrow );

  //-- Y unit vector
  color("Green")
    vector([0,l,0],l_arrow=l_arrow);

  //-- Origin
  color("Gray")
    sphere(r=1, $fn=obiscad_drawing_resolution);
}

// vim: set sw=2 ts=2 noet:

```


[User]
Hey there, I'm looking to generate a chainmail design in OpenSCAD, and I'd like to make it parametric so I can easily adjust the size and dimensions. I've seen a few designs out there, but I'd like to have something custom.

Here's what I'm thinking:

The basic unit will be a link that interlocks with others. Each link should be a square-ish shape with a cut-out, kind of like a rounded square with bits chopped out of the sides. I need to be able to control the overall width of the link, the thickness, and the vertical spacing between the top and bottom parts. I also want to be able to make some of the links "open" by adding a small gap to one side - this should be configurable as well, with separate parameters controlling which sides are "open."

I want to arrange these links in a grid pattern to form a sheet of chainmail. I need to be able to define the overall width and length of this sheet in terms of the number of links rather than precise dimensions. I should also be able to control the spacing (pitch) between adjacent links.

I’d also like to include functionality for “ditto printing” which I saw in one version online. I need a switch for turning ditto printing on and off, and a parameter to control the nozzle separation if ditto printing is enabled. In the ditto case, the chainmail sheet will be generated with several stripes offset to account for this nozzle spacing, so there should be some math to make this work automatically. The horizontal size of a single link will be controlled by nozzle separation and the number of nozzles.

Finally, I want to use the `build_plate` module from a library that appears to be called `utils` (or something close) to include a visual build plate that shows how this would fit on different printers. I don't have the exact code for this library, but I assume it will allow you to choose between a few standard printer profiles, as well as manual dimensions.

So, to recap, I'll need parameters for:

*   `ditto`: boolean (0 for false, 1 for true)
*   `x_dim`: overall width of the chainmail in mm
*   `y_dim`: overall length of the chainmail in mm
*   `T`: thickness of the links
*   `vtol`: vertical spacing between the top and bottom parts of the links
*  `np`: number of links between nozzles (ditto mode only)
*   `nozzle_separation`: spacing between nozzles (ditto mode only)
*   `gap`: cut width for open links
*   `build_plate_selector`: numerical id for build plate type
*   `build_plate_manual_x`: manual x dimension of build plate
*   `build_plate_manual_y`: manual y dimension of build plate
* `openX`: boolean (0 for false, 1 for true) to make links on the right edge of a grid open
* `openY`: boolean (0 for false, 1 for true) to make links on the top edge of a grid open

The main modules should be:

*   `link()`: generates a single chainmail link, with an optional `open` parameter.
*   `grid()`: places the links in a grid pattern.
*   `mesh()`: uses `grid()` to create a single flat sheet of chainmail, with an optional `openX` and `openY` parameter.
* `dittomesh()`: uses `mesh()` to create several offset strips of chainmail.

I think that's everything. Let me know if you have any questions!

[Assistant]
fixedExtensibleChainmail.scad:
```
// Dual head ditto printing, 0 for false, 1 for true
ditto=0;
//Width of chainmail
x_dim=220;
//Length of chainmail
y_dim=140;
// thickness
T=2;
// vertical spacing
vtol=0.6;
// number of links between nozzles
np=3;
// for ditto printing, also controls size of links
nozzle_separation=33;
// cut width for open links
gap=0.2;

use <utils/build_plate.scad>

//for display only, doesn't contribute to final object
build_plate_selector = 1; //[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]
build_plate_manual_x = 220; //[100:400]
build_plate_manual_y = 100; //[100:400]

build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);

pitch=nozzle_separation/np;
w=pitch-(pitch/2-2*T)/2;
echo(w);

if(ditto)
	dittomesh(stripes=round(x_dim/(np*2*pitch)-0.5-1/(4*np)),m=round(y_dim/pitch-1));
else
	mesh(n=round(x_dim/pitch-1),m=round(y_dim/pitch-1));

module dittomesh(stripes,m)
for(i=[1:stripes])assign(o= i==stripes ? 1 : 0)
	translate([(i-stripes/2-1/4)*np*2*pitch,0,0])mesh(np,m,openX=o);

module mesh(n=2,m=2,openX=1,openY=1){
translate([pitch/4,pitch/4,T/2])grid(n,m,openX,openY);
translate([-pitch/4,-pitch/4,T/2])grid(n,m);
}

module grid(n=2,m=2,openX=0,openY=0)
for(i=[1:n]){
	for(j=[1:m]){
		assign(open= ((i==n && openX) || (j==m && openY)) ? 1 : 0)
		translate([(i-n/2-1/2)*pitch,(j-m/2-1/2)*pitch,0])link(open);
	}
}

module link(open=0)
difference(){
	cube([w,w,T],center=true);
	translate([0,0,T/2-vtol/2])cube([w+T,w-2*T,T],center=true);
	translate([0,0,-T/2+vtol/2])cube([w-2*T,w+T,T],center=true);
	translate([w/2,-w,vtol/2])rotate([0,-45,0])cube(2*w);
	translate([-w/2,-w,vtol/2])rotate([0,-45,0])cube(2*w);
	translate([-w,w/2,-vtol/2])rotate([-135,0,0])cube(2*w);
	translate([-w,-w/2,-vtol/2])rotate([-135,0,0])cube(2*w);
	if(open==1)translate([w,0,0])cube([2*w,gap,2*T],center=true);
}

```


[User]
Hey, I'm trying to design a customizable wheel using OpenSCAD, but I'm having some trouble getting the hang of it. Could you help me generate a script?

Here's what I'm looking for:

The wheel should have a central hole, spokes radiating outwards, and a circular outer rim. I'd like to be able to customize several aspects.

First, I need a variable for the number of spokes.  Let's call it `num_spokes` and it should be adjustable, perhaps with a default value of 20.

Second, the center hole needs a diameter. I'd like to be able to adjust both the diameter and the number of sides it has. Let's call these `center_diameter` and `center_sides`, with default values of 2 and 6 respectively. It should be a regular polygon.

Third, the spokes themselves.  I'd like to control the width of the spokes, let's call it `spoke_width`, with a default value of 1.

Fourth, the overall wheel radius, named `wheel_radius`, default to 25.

Fifth, the overall wheel thickness named `wheel_thickness`, with a default of 3.

And finally, I'd like an option for a rim on each side of the wheel. I'd like a toggle to turn this on or off with `rim_enabled`. There should also be an adjustable diameter for the rim itself with `rim_diameter_offset`, defaulting to 1.

Could you generate an OpenSCAD file for me that includes all of this? It would be great if it was clear and easy to read! I don't need any special libraries or anything.

[Assistant]
wheel.scad:
```
//How Many Spokes Should There Be?
m=20; //[4:50]
//How Large Should The Center Hole Be?
h=2; //[1:12]
//How Many Sides Should The Center Hole Have?
c=6; //[3:12]
//How Large Are The Spokes?
a=1; //[1:8]
//What Is The radius Of The Wheel?
text_box=25;
//What Is The Height Of the Wheel?
l=3; //[3:20]
//Is There A Rim On The End?
rim="yes"; //[yes,no]
//How Much Lager Is The Toltal Rim Diameter? (Only Applys If There Is A Rim)
rd=1; //[1:5]

s=360/m;
difference() {
    cylinder(h=l,r=h+.5,$fn=50,center=true);
    cylinder(h=l+1,r=h,$fn=c,center=true);
}
for(r=[0:s:360]) {
    translate([0,0,0-a/2]) {
        rotate([0,0,r]) {
            difference() {
                cube([a,text_box-.5,a]);
                rotate([0,0,0-r]) {
                    cylinder(h=l+1,r=h,$fn=c,center=true);
                }
            }
        }
    }
}
difference() {
    cylinder(h=l,r=text_box, $fn=50,center=true);
    cylinder(h=l+1,r=text_box-1, $fn=50,center=true);
}
if(rim=="yes") {
    translate([0,0,l/3]) {
        difference() {
            cylinder(h=l/3,r=rd+text_box, $fn=50,center=true);
            cylinder(h=l+1,r=text_box-1, $fn=50,center=true);
        }
    }
    translate([0,0,0-l/3]) {
        difference() {
            cylinder(h=l/3,r=rd+text_box, $fn=50,center=true);
            cylinder(h=l+1,r=text_box-1, $fn=50,center=true);
        }
    }
}
```


[User]
I'd like to design a long spoon for mixing, and I'm aiming for a parametric design in OpenSCAD. I'll need two identical pieces that can be printed and then joined together, so the model will need to create a single piece of a spoon that will be doubled in the final print.

Here are the details:

*   **Overall Shape:** The spoon is basically a long, thin rectangle for the handle that transitions into a rounded or slightly cubic end for mixing.
*   **Parameters:**
    *   `width`: Length of the rectangular handle part. I'd like to be able to adjust this from 50mm to 300mm.
    *   `height`: Thickness of the spoon. Range: 4mm to 20mm.
    *   `depth`: Width of the spoon. Range: 4mm to 20mm.
    *   `UseCubicTip`: A boolean (yes/no) to switch between a rounded (cylinder) tip and a cubic tip.
*   **Construction:** The handle should be a simple rectangular extrusion of width, depth, and height. The tip should be formed by a hull that blends the handle into either a rounded cylinder or a cube at the end, with a further blending into a smaller cylinder or cube above that.
*   **Assembly:** I'll print two copies of this single spoon part, flip one, and glue them together.
*   **Important:** I understand the concerns about food safety with 3D printed materials, so that's noted. The goal of this design is simply to create the model.

Could you generate the OpenSCAD code for this? I don't need any libraries but if it would be useful, please use $fn for smooth curves.

[Assistant]
VeryLongSpoon.scad:
```
width = 170; // [50:300]
height = 6;  // [4:20]
depth = 7;   // [4:20]
UseCubicTip = "yes"; // [yes,no]
/* HIDDEN */
$fn=100;
CubicTip= (UseCubicTip=="yes");

P1(false);
translate([width+depth,depth*4])rotate(a=[0,0,180]) P1(CubicTip);

module P1(Cubic){
    cS1 = depth*2;
    cS2 = depth*1.5;
    cube([width,depth,height]);
    translate([-depth*2,0])cube([depth*2,depth,height/2-0.1]);
    translate([width+depth-depth/2+1,depth/2]) difference(){
        hull(){
            cylinder(d=depth*2,h=height);
            if(Cubic) {translate([depth,-cS1/2]) cube([cS1,cS1,height]);}
            else {translate([depth,0]) cylinder(d=depth*2,h=height);}
        }
        translate([0,0,height*2/3+0.1]) hull(){
            cylinder(d=depth*1.5,h=height/3);
            if(Cubic) {translate([depth,-cS2/2]) cube([cS2+1,cS2,height/3]);}
            else {translate([depth,0]) cylinder(d=depth*1.5,h=height/3);}
        }
    }
}
```