[User]
Okay, I'm looking to create a 3D printable tree using OpenSCAD, and I've seen some cool examples using recursion, but it seems that's not fully supported in all contexts. I'm hoping you can help me create a parametric OpenSCAD file that generates a tree with a similar branching pattern to the one I've seen but without using actual recursion, since that seems problematic.

Here's the basic idea: The tree should consist of cylindrical segments, each becoming thinner towards the top. It will have a trunk and then branches that split, and then those branches split again, and so on, for a number of levels.

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

*   **`height`**: The initial height of the trunk (and the base height for later branches) in millimeters.
*   **`number_of_levels`**: The total number of branching levels in the tree. This should be an integer, probably between 1 and 8.
*   **`TILTANGLE`**: The angle (in degrees) at which branches tilt upwards from the parent branch.
*   **`ZANGLE`**: The angle (in degrees) by which each branch is rotated around the z-axis. I want to ensure the branches are spread out nicely.
*   **`HEIGHTFACT`**: A factor that determines the height of each child branch relative to its parent branch. A value less than 1.
*   **`height_to_with_bottom`**: used in combination with height, this value specifies the radius of the cylinder at the bottom.
*   **`height_to_with_top`**: used in combination with height, this value specifies the radius of the cylinder at the top.

Essentially, each level of the tree should be generated by its own set of modules so the recursion effect is achieved by chaining modules together manually, rather than using a recursive call. The color of the branches should change slightly with each level, and I think you could do that using `color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ])` where 'level' represents the current branch level, so the trunk starts at level 0 and then each successive level increments the value used for color.

I'm not using any special libraries for this - just the standard OpenSCAD functions. I'm imagining that the trunk and branches will be made out of simple cylinders, with the dimensions changing according to the parameters.

The modules should be structured so that the trunk is built using a `tree(level, height)` module, which calls `branch1` modules, which calls `tree1` modules, which calls `branch2` modules, which calls `tree2` modules, and so on.

Can you help me generate the OpenSCAD file to do this? I want to see how the overall design changes as I adjust these input parameters. I expect this to work in the OpenSCAD Customizer.

[Assistant]
recursive_tree_-_pseudo.scad:
```
height = 20;
number_of_levels=6; // [1:8]
TILTANGLE = 30;
ZANGLE = 120;
HEIGHTFACT = 0.75;
height_to_with_bottom = 18;
height_to_with_top = 20;

tree (0, height);

module tree(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom, height / height_to_with_top);
	if (level < number_of_levels-1){
		branch1(level + 1, TILTANGLE, height, 1, 0, 0);
		branch1(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch1(level + 1, TILTANGLE, height, 0, 1, 0);
		branch1(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

module branch(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom, r2= height / height_to_with_top);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree(level, height * HEIGHTFACT);
			}
		}
	}
}

/////////////
// Level 1 //
/////////////

module branch1(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom, r2= height / height_to_with_top);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree1(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree1(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom, height / height_to_with_top);
	if (level < number_of_levels-1){
		branch2(level + 1, TILTANGLE, height, 1, 0, 0);
		branch2(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch2(level + 1, TILTANGLE, height, 0, 1, 0);
		branch2(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 2 //
/////////////

module branch2(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom, r2= height / height_to_with_top);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree2(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree2(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom, height / height_to_with_top);
	if (level < number_of_levels-1){
		branch3(level + 1, TILTANGLE, height, 1, 0, 0);
		branch3(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch3(level + 1, TILTANGLE, height, 0, 1, 0);
		branch3(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 3 //
/////////////

module branch3(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom, r2= height / height_to_with_top);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree3(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree3(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom, height / height_to_with_top);
	if (level < number_of_levels-1){
		branch4(level + 1, TILTANGLE, height, 1, 0, 0);
		branch4(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch4(level + 1, TILTANGLE, height, 0, 1, 0);
		branch4(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 4 //
/////////////

module branch4(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom, r2= height / height_to_with_top);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree4(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree4(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom, height / height_to_with_top);
	if (level < number_of_levels-1){
		branch5(level + 1, TILTANGLE, height, 1, 0, 0);
		branch5(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch5(level + 1, TILTANGLE, height, 0, 1, 0);
		branch5(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 5 //
/////////////

module branch5(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom, r2= height / height_to_with_top);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree5(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree5(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom, height / height_to_with_top);
	if (level < number_of_levels-1){
		branch6(level + 1, TILTANGLE, height, 1, 0, 0);
		branch6(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch6(level + 1, TILTANGLE, height, 0, 1, 0);
		branch6(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 6 //
/////////////

module branch6(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom, r2= height / height_to_with_top);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree6(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree6(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom, height / height_to_with_top);
	if (level < number_of_levels-1){
		branch7(level + 1, TILTANGLE, height, 1, 0, 0);
		branch7(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch7(level + 1, TILTANGLE, height, 0, 1, 0);
		branch7(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 7 //
/////////////

module branch7(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom, r2= height / height_to_with_top);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree7(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree7(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom, height / height_to_with_top);
	if (level < number_of_levels-1){
		branch8(level + 1, TILTANGLE, height, 1, 0, 0);
		branch8(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch8(level + 1, TILTANGLE, height, 0, 1, 0);
		branch8(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 8 //
/////////////

module branch8(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom, r2= height / height_to_with_top);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree8(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree7(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom, height / height_to_with_top);
	if (level < number_of_levels-1){
		branch8(level + 1, TILTANGLE, height, 1, 0, 0);
		branch8(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch8(level + 1, TILTANGLE, height, 0, 1, 0);
		branch8(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

```


[User]
Okay, I'd like to design a customizable card box for trading cards, specifically Magic: The Gathering cards, but I want it to be flexible enough for other types of cards too. I'd like to be able to specify the number of cards, the card dimensions (width, height, and thickness, accounting for sleeves), and have the box automatically adjust its size accordingly.

Here are the specific features I want:

1.  **Card Size Parameters:** I need to be able to set the card width, card height, and card thickness. I also want to be able to specify the number of cards the box should hold. The box should automatically calculate the internal dimensions based on these parameters.

2.  **Wall Thickness and Seal Gap:** The box should have a parameter for the wall thickness of the plastic and a small 'seal gap' to ensure the lid fits properly, but not too tightly. The seal gap should be a global variable that can be easily changed, just like the wall thickness.

3.  **Bottom Half Height:** There needs to be a parameter to specify the height of the bottom half of the box, which essentially dictates where the lid starts to overlap. There will be a secondary parameter that controls the overlap distance.

4.  **Customizable Text:**
    *   I want to add text to the bottom and top of the box. I need to be able to specify the text itself, its height, and its offset from the edge. This text should be on the face of the box, not on the sides.
    *  I also need to add text to the front/back of the lid, as well as the top. All of these should be separately specified with text and text heights.
	*   I'd like to use the `write.scad` library (that I've included in my project) to handle the text rendering and placement. It already supports `center` and `rotate` parameters, so those should be made available to me in this design. I also need to be able to change the `font` file as well.

5.  **Symbol/Logo:** I need a place to put a symbol or logo on the front face of the box. This will be an imported DXF file (like the `red.dxf` example from my file). I need to be able to specify the file name and a scaling factor for the symbol.

6.  **Lid Design:** The lid should overlap the bottom part of the box. The amount of overlap should be a parameter. The lid should be a separate module (it seems like in my sample code I already was doing that) that can be rendered separately.

7.  **Basic Shapes:** I just need a basic box shape that will have the card-sized space inside it and some space around it.

8.  **Nozzle Diameter:** We should include a parameter for nozzle diameter to calculate minimum feature sizes.

9.  **Mitered Edges:** It is not in the included sample code but, for my final output I would like to have mitred edges, if that is possible.

10. **Parametric Design:** Everything (card size, wall thickness, text, symbols, overlap, etc.) should be adjustable through parameters.

I'm using a library called `write.scad` which provides the necessary text rendering capabilities. I've included that in my project and its default parameters (e.g. `h`, `t`, `space`, `font`, etc.) should be accessible. I want to make sure the code is set up to take advantage of that library.

Can you generate an OpenSCAD file that meets these requirements?

[Assistant]
Write.scad:
```
/* 	Version 3
	Added support for font selection (default is Letters.dxf)
	Added WriteCube module
	Added Rotate for text (rotates on the plane of the text)
	Added writesphere
	Added space=     (spacing between characters in char widths) def=1
	Added writecylinder()

 By Harlan Martin
 harlan@sutlog.com
 January 2012

 (The file TestWrite.scad gives More usage examples)
 (This module requires the file Letters.dxf to reside in the same folder)
 (The file Letters.dfx was created with inkscape..Each letter is in its own layer)
 (This module seperates each letter in the string and imports it from Letters.dfx)

*/

	pi=3.1415926535897932384626433832795028841971693993751058209;
	pi2=pi*2;

// These control the default values for write() writesphere() writecube()
// if the parameters are not included in the call. Feel free to set your own
// defaults.

//default settings
	center=false;
	h = 4;			 //mm letter height
	t = 1; 			//mm letter thickness
	space =1; 			//extra space between characters in (character widths)
	rotate=0;			// text rotation (clockwise)
	font = "Letters.dxf";	//default for aditional fonts

// write cube defaults
	face = "front";	 // default face (top,bottom,left,right,back,front)
	up =0;		 //mm up from center on face of cube
	down=0;
	right =0;		 //mm left from center on face of cube
	left=0;

// write sphere defaults
	rounded=false;	 //default for rounded letters on writesphere
	north=0; 		// intial text position (I suggest leave these 0 defaults)
	south=0;
	east=0;
	west=0;
	spin=0;
// writecylinder defaults
	middle=0;     //(mm toward middle of circle)
	ccw=false;   //write on top or bottom in a ccw direction
 	r1=0; 	//(not implimented yet)
	r2=0;	 	//(not implimented yet)

// Contact me if your interested in how to make your own font files
// Its tedious and time consuming, but not very hard

module writecylinder(text,where,radius,height){
	wid=(.125* h *5.5 * space);
	widall=wid*(len(text)-1)/2;
	//angle that measures width of letters on sphere
	function NAngle(radius)=(wid/(pi2*radius))*360;
	//angle of half width of text
	function mmangle(radius)=(widall/(pi2*radius)*360);

	if ((face=="top")||(face=="bottom") ){
		if (face=="top" ){
			if (center==true){
				writecircle(text,where+[0,0,height/2],radius-h,rotate=rotate,font=font,h=h,t=t,
				space=space,east=east,west=west,middle=middle,ccw=ccw);
			}else{
				writecircle(text,where+[0,0,height],radius-h,rotate=rotate,font=font,h=h,t=t,
				space=space,east=east,west=west,middle=middle,ccw=ccw);
			}
		}else{
			rotate(180,[1,0,0])
			if (center==true){
				writecircle(text,where+[0,0,height/2],radius-h,rotate=rotate,font=font,h=h,t=t,
				space=space,east=east,west=west,middle=middle,ccw=ccw);
			}else{
				writecircle(text,where+[0,0,0],radius-h,rotate=rotate,font=font,h=h,t=t,
				space=space,east=east,west=west,middle=middle,ccw=ccw);
			}
		}

	}else{
//		if (radius>0){
			if (center==true)  {
				rotate(-mmangle(radius)*(1-abs(rotate)/90),[0,0,1])
				translate(where)
				writethecylinder(text,where,radius,height,r1=radius,r2=radius,h=h,
					rotate=rotate,t=t,font=font,face=face,up=up,down=down,
					east=east,west=west,center=center,space=space,rounded=rounded);
			} else{
				rotate(-mmangle(radius)*(1-abs(rotate)/90),[0,0,1])
				translate(where+[0,0,height/2])
					writethecylinder(text,where,radius,height,r1=radius,r2=radius,h=h,
					rotate=rotate,t=t,font=font,face=face,up=up,down=down,
					east=east,west=west,center=center,space=space,rounded=rounded);
			}
// the remarked out code is for cone shaped cylinders (not complete)
//		}else{
//			if (center==true)  {
//				rotate(-mmangle(radius)*(1-abs(rotate)/90),[0,0,1])
//				translate(where)
//				writethecylinder(text,where,radius,height,r1=r1,r2=r2,h=h,
//					rotate=rotate,t=t,font=font,face=face,up=up,down=down,
//					east=east,west=west,center=center,space=space,rounded=rounded);
//			} else{
//				rotate(-mmangle(radius)*(1-abs(rotate)/90),[0,0,1])
//				translate(where+[0,0,height/2])
//					writethecylinder(text,where,radius,height,r1=r1,r2=r2,h=h,
//					rotate=rotate,t=t,font=font,face=face,up=up,down=down,
//					east=east,west=west,center=center,space=space,rounded=rounded);
//			}
//		}
	}
}
module writecircle(text,where,radius){
	wid=(.125* h *5.5 * space);
	widall=wid*(len(text)-1)/2;
	//angle that measures width of letters on sphere
	function NAngle(radius)=(wid/(pi2*radius))*360;
	//angle of half width of text
	function mmangle(radius)=(widall/(pi2*radius)*360);

	if (ccw==true){
		rotate(-rotate+east-west,[0,0,1]){
			rotate(-mmangle(radius-middle),[0,0,1]){
			translate(where)
				for (r=[0:len(text)-1]){
					rotate(-90+r*NAngle(radius-middle),[0,0,1]) // bottom out=-270+r
					translate([radius-middle,0,0])
					//rotate(90,[1,0,0])
					//rotate(90,[0,1,0])
					rotate(-270,[0,0,1])  // flip text (botom out = -270)
					write(text[r],center=true,h=h,t=t,font=font);
				}
			}
		}
	}else{
		rotate(-rotate-east+west,[0,0,1]){
			rotate(mmangle(radius-middle),[0,0,1]){
			translate(where)
				for (r=[0:len(text)-1]){
					rotate(90-r*NAngle(radius-middle),[0,0,1]) // bottom out=-270+r
					translate([radius-middle,0,0])
					//rotate(90,[1,0,0])
					//rotate(90,[0,1,0])
					rotate(270,[0,0,1])  // flip text (botom out = -270)
					write(text[r],center=true,h=h,t=t,font=font);
				}
			}
		}
	}

}
module writethecylinder(text,where,radius,height,r1,r2){
	wid=(.125* h *5.5 * space);
	widall=wid*(len(text)-1)/2;
	//angle that measures width of letters on sphere
	function NAngle(radius)=(wid/(pi2*radius))*360*(1-abs(rotate)/90);
	//angle of half width of text

	function mmangle(radius)=(widall/(pi2*radius)*360);
			translate([0,0,up-down])
			rotate(east-west,[0,0,1])
			for (r=[0:len(text)-1]){
				rotate(-90+(r*NAngle(radius)),[0,0,1])
				translate([radius,0,-r*((rotate)/90*wid)+(len(text)-1)/2*((rotate)/90*wid)])
				rotate(90,[1,0,0])
				rotate(90,[0,1,0])
				write(text[r],center=true,h=h,rotate=rotate,t=t,font=font);
		//echo("zloc=",height/2-r*((rotate)/90*wid)+(len(text)-1)/2*((rotate)/90*wid));
			}

}

module writesphere(text,where,radius){
	wid=(.125* h *5.5 * space);
	widall=wid*(len(text)-1)/2;

	echo("-----------------",widall,wid,mmangle(radius));
	//angle that measures width of letters on sphere
	function NAngle(radius)=(wid/(pi2*radius))*360;
	//angle of half width of text
	function mmangle(radius)=(widall/(pi2*radius)*360);

	rotate(east-west,[0,0,1]){
	rotate(south-north,[1,0,0]){
	rotate(spin,[0,1,0]){
	rotate(-mmangle(radius),[0,0,1]){
		if ( rounded== false ){
			translate(where)
			for (r=[0:len(text)-1]){
				rotate(-90+r*NAngle(radius),[0,0,1])
				translate([radius,0,0])
				rotate(90,[1,0,0])
				rotate(90,[0,1,0])
				write(text[r],center=true,h=h,rotate=rotate,t=t,font=font);
			}
		}else{
			difference(){
				translate(where)
				for (r=[0:len(text)-1]){
					rotate(-90+r*NAngle(radius),[0,0,1])
					translate([radius,0,0])
					rotate(90,[1,0,0])
					rotate(90,[0,1,0])
					write(text[r],center=true,h=h,rotate=rotate,t=t*2+h,font=font);
				}
				difference(){ //rounded outside
					sphere(radius+(t*2+h)*2);
					sphere(radius+t/2);
				}
				sphere(radius-t/2); // rounded inside for indented text
			}
		}
	}
}}}
}

module writecube(text,where,size){
	if (str(size)[0] != "["){
		// its a square cube (size was not a matrix so make it one)
		writethecube(text,where,[size,size,size],h=h,rotate=rotate,space=space,
		t=t,font=font,face=face,up=up,down=down,right=right,left=left);

	}else{
		// its not square
		writethecube(text,where,size,h=h,rotate=rotate,space=space,
		t=t,font=font,face=face,up=up,down=down,right=right,left=left);
	}
}
// I split the writecube module into 2 pieces.. easier to add features later
module writethecube(text,where,size){
		if (face=="front") {
			translate([where[0]+right-left,where[1]-size[1]/2,where[2]+up-down])
			rotate(90,[1,0,0])
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
		if (face=="back") {
			translate([where[0]+right-left,where[1]+size[1]/2,where[2]+up-down])
			rotate(90,[1,0,0])   // rotate around the x axis
			rotate(180,[0,1,0])  // rotate around the y axis (z before rotation)
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
		if (face=="left") {
			translate([where[0]-size[0]/2,where[1]-right+left,where[2]+up-down ])
			rotate(90,[1,0,0])   // rotate around the x axis
			rotate(90,[0,-1,0])  // rotate around the y axis  (z before rotation)
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
		if (face=="right") {
			translate([where[0]+size[0]/2,where[1]+right-left,where[2] +up-down])
			rotate(90,[1,0,0])   // rotate around the x axis
			rotate(90,[0,1,0])  // rotate around the y axis  (z before rotation)
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
		if (face=="top") {
			translate([where[0]+right-left,where[1]+up-down,where[2]+size[2]/2 ])
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
		if (face=="bottom") {
			translate([where[0]+right-left,where[1]-up+down,where[2]-size[2]/2 ])
			rotate(180,[1,0,0])
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
}

module write(word){

	echo (h);
	echo (word);
	echo ("There are " ,len(word) ," letters in this string");
//	echo ("The second letter is ",word[1]);
//	echo (str(word[0],"_"));
rotate(rotate,[0,0,-1]){
	for (r = [0:len(word)]){   // count off each character
		// if the letter is lower case, add an underscore to the end for file lookup
		if ((word[r] == "a" ) || (word[r]== "b")  || (word[r]== "c")
	 	  || (word[r]== "d") || (word[r]== "e") || (word[r]== "f")
	 	  || (word[r]== "g") || (word[r]== "h")  || (word[r]== "i")
       	  	  || (word[r]== "j") || (word[r]== "k") || (word[r]== "l")
       	 	  || (word[r]== "m") || (word[r]== "n") || (word[r]== "o")
       	 	  || (word[r]== "p") || (word[r]== "q") || (word[r]== "r")
	 	  || (word[r]== "s") || (word[r]== "t") || (word[r]== "u")
       	 	  || (word[r]== "v") || (word[r]== "w") || (word[r]== "x")
       	 	  || (word[r]== "y" )|| (word[r]== "z")){
			if (center == true)  {
				translate([0,-h/2,0]){
					scale([.125*h,.125*h,t]){
						translate([ (-len(word)*5.5*space/2) + (r*5.5*space),0,0])
						linear_extrude(height=1,convexity=10,center=true){
							import(file = font,layer=str(word[r],"_"));
						}
					}
				}
			}else{
				translate([0,0,t/2]){
					scale([.125*h,.125*h,t]){
						translate([r*5.5*space,0,0])
						linear_extrude(height=1,convexity=10,center=true){
							import(file = font,layer=str(word[r],"_"));
						}
					}
				}
			}

		}else{
			if (center == true)  {
				translate([0,-h/2,0]){
					scale([.125*h,.125*h,t]){
						translate([ (-len(word)*5.5*space/2) + (r*5.5*space),0,0])
						linear_extrude(height=1,convexity=10,center=true){
							import(file = font,layer=str(word[r]));
						}
					}
				}
			}else{
				translate([0,0,t/2]){
					scale([.125*h,.125*h,t]){
						translate([r*5.5*space,0,0])
						linear_extrude(height=1,convexity=10,center=true){
							import(file = font,layer=str(word[r]));
						}
					}
				}
			}
		}
	}
}
}

/*writecylinder test
translate([0,0,0])
%cylinder(r=20,h=40,center=true);
color([1,0,0])
writecylinder("rotate=90",[0,0,0],20,40,center=true,down=0,rotate=90);
writecylinder("rotate = 30,east = 90",[0,0,0],20,40,center=true,down=0,rotate=30,east=90);
writecylinder("ccw = true",[0,0,0],20,40,center=true,down=0,face="top",ccw=true);
writecylinder("middle = 8",[0,0,0],20,40,h=3,center=true,down=0,face="top",middle=8);
writecylinder("face = top",[0,0,0],20,40,center=true,down=0,face="top");
writecylinder("east=90",[0,0,0],20,40,h=3,center=true,down=0,face="top",east=90);
writecylinder("west=90",[0,0,0],20,40,h=3,center=true,down=0,face="top",ccw=true,west=90);
writecylinder("face = bottom",[0,0,0],20,40,center=true,down=0,face="bottom");
*/
/*writesphere test
sphere(20);
color([1,0,0])
writesphere("Hello World",[0,0,0],20,t=1,h=6);
*/
/* writecube test
translate([30,30,30])
cube([10,15,30],center=true);
write("hello",center=true,rotate =30);
color([1,0,0])
writecube( "front",[30,30,30],[10,15,30],h=5,rotate=-90);
color([0,1,0])
writecube( "back",[30,30,30],size=[10,15,30],h=5,face="back",rotate=90,t=4);
color([0,0,1])
writecube( "left",[30,30,30],[10,15,30],h=5,face="left",up=5);
color([1,1,0])
writecube( "right",where=[30,30,30],size=[10,15,30],h=5,face="right",rotate=55);
color([1,0,1])
writecube( "top",where=[30,30,30],size=[10,15,30],h=5,face="top");
color([1,1,1])
writecube( "bttm",where=[30,30,30],size=[10,15,30],h=5,face="bottom",rotate=90);
*/

```
cardBox.scad:
```
include <write.scad>
readyToPrint=1;
/* Personalization-Box*/
//Choose a mana symbol
symboleFile="red.dxf";//[black.dxf, blue.dxf, green.dxf, red.dxf, white.dxf,none.dxf]
// a scale of 1 is ~25mm design volume
symboleScale=1.75;
bottomText="Bottom Text";
//Height of text in mm
bottomTextHeight=6;
// this defines how far above the bottom of the box the text starts
bottomOffset=2;
topText="Top Text";
topTextHeight=6;
//this defines how far from the break the top text is
topOffset=2;
innerBoxHeight=bottomHalfHeight;

/*Personalization-Lid */
lidFrontBackText="Lid Side";
lidFrontBackTextHeight=6;
lidTopText="Lid Top";
lidTopTextSize=6;

/* Card Information */
//Most cards are ~67mm without a sleeve
cardWidth=67;
//most cards are about ~90mm without sleeve
cardHeight=92;
// Magic cards are ~.3mm, with a sleeve this becomes ~.5mm. The case will have 2*wall Thickness extra space in the volume to get your cards in an out.
cardThickness=.6;
//This is the card count for the box, it should be a postive integer
numberOfCards=100;

/* Case parameters */
//this is the plastic thickness of case
wallThickness=2;
// This is a fudge factor to insure that your box has a tight but openable seal. you ay want to tweek this depending on the printer
sealGap=.1;
// this defines the seam location, should be less than the card height
bottomHalfHeight=80;
// This defines how much of the box overlaps with the lid
overlapDistance=10;
//Nozzel diameter
nozzelDiameter=.4;

outerBoxHeight=70;//bottomHalfHeight-overlapDistance;
innerBoxHeight=80;//bottomHalfHeight;
//the is the volume of the cards
module cards(){
cube([cardThickness*numberOfCards,cardWidth,cardHeight]);
}

module box(){
difference(){
difference(){
difference(){
union(){
translate([-3*wallThickness/2,-2*wallThickness/2,-2*wallThickness/2]) cube([cardThickness*numberOfCards+sealGap+6*wallThickness/2,cardWidth+sealGap+4*wallThickness/2,sealGap+outerBoxHeight+2*wallThickness/2]);
translate([-2*wallThickness/2,-1*wallThickness/2,-2*wallThickness/2]) cube([cardThickness*numberOfCards+sealGap*2+4*wallThickness/2,cardWidth+sealGap*2+2*wallThickness/2,innerBoxHeight+2*wallThickness/2]);
}
translate([-1*wallThickness/2-sealGap,-sealGap,-wallThickness/2-sealGap])cube([cardThickness*numberOfCards+2*wallThickness/2+.2,cardWidth+0*wallThickness/2+.2,cardHeight+wallThickness/2+sealGap]);
}
translate([-wallThickness*1.5,0,0]) face();
}
translate([cardThickness*numberOfCards+3*wallThickness/2,cardWidth,0]) rotate([0,0,180]) face();
}
}
module face(){
union(){
union(){
translate([-nozzelDiameter,cardWidth/2,outerBoxHeight/2])rotate([90,0,90])scale([symboleScale,symboleScale,1])linear_extrude(height = wallThickness)import(symboleFile);

translate([0,cardWidth/2,bottomTextHeight/2+bottomOffset])rotate([90,0,270])write(bottomText,h=bottomTextHeight,center=true,t=wallThickness);
}
translate([0,cardWidth/2,outerBoxHeight-nozzelDiameter-bottomTextHeight/2-topOffset])rotate([90,0,270])write(topText,h=topTextHeight,center=true,t=wallThickness);
}
}
module lid(){
difference(){
difference(){
difference(){
difference(){
difference(){
translate([-3*wallThickness/2,-2*wallThickness/2,outerBoxHeight+.1])cube([cardThickness*numberOfCards+6*wallThickness/2,cardWidth+4*wallThickness/2,(cardHeight-outerBoxHeight+wallThickness)]);
translate([-2*wallThickness/2,-wallThickness/2,outerBoxHeight])cube([cardThickness*numberOfCards+4*wallThickness/2,cardWidth+2*wallThickness/2,(innerBoxHeight-outerBoxHeight+.1)]);
}
translate([-1*wallThickness/2,-0*wallThickness/2,sealGap])cube([cardThickness*numberOfCards+2*wallThickness/2,cardWidth,(cardHeight)]);
}
translate([cardThickness*numberOfCards/2,cardWidth/2,(cardHeight+wallThickness)]) rotate([0,0,90])write(lidTopText,h=lidTopTextSize,center=true,t=wallThickness);
}
translate([-1.5*wallThickness,cardWidth/2,innerBoxHeight+(cardHeight-innerBoxHeight)/2]) rotate([90,0,270])write(lidFrontBackText,h=lidFrontBackTextHeight,center=true,t=wallThickness);
}
translate([cardThickness*numberOfCards+3*wallThickness/2,cardWidth/2,innerBoxHeight+(cardHeight-innerBoxHeight)/2]) rotate([90,0,90])write(lidFrontBackText,h=lidFrontBackTextHeight,center=true,t=wallThickness);
}
}
translate([0,0,wallThickness])box();

*translate([0,-readyToPrint* 10 * wallThickness, readyToPrint*(wallThickness + cardHeight) ]) rotate([180,0,0])  lid();

*translate([0,0, readyToPrint*(wallThickness + cardHeight) ]) rotate([180,0,0])  lid();

```


[User]
Okay, here's my design request:

I'm looking for an OpenSCAD script to generate battery holders, similar to what I've already started, but I need it to be more flexible and robust. I want it to handle different battery sizes and arrangements, with customizable dimensions and a more polished output.

Here are the key features and parameters I need:

**Core Functionality:**

*   **Battery Type Selection:** The script should support standard battery sizes (AAA, AA, C, D) as well as a "custom" size option where the user can specify the battery length and diameter.
*   **Cell Count:** The holder should be able to hold a specified number of cells, arranged in a line.
*   **Cell Dimensions:**
    *   For standard sizes, the script should use pre-defined dimensions for length and diameter.
    *   For "custom" sizes, the user should be able to input `custom_length` and `custom_diameter`.
*   **Spacing and Wall Thickness:**
    *   The user should be able to set `space`, the clearance between the battery and the holder's inner walls.
    *   The user should be able to set `wall`, the thickness of the holder's walls.
*   **Build Plate Visualization:** The design must include the ability to visualize the outline of a build plate for size reference. The user should be able to specify common printer build plates by name (e.g., Replicator 2, Replicator, Thingomatic) or by manual X and Y dimensions. This build plate outline is *only* for display and does not affect the final STL generation.

**Design Requirements:**

*   **Individual Cell Holders:** Each cell should sit in its own separate compartment within the holder.
*   **Simple Construction:** The holder should have a simple, geometric design that's easy to 3D print. My current version uses cubes with subtracted volumes and some extra stabilizing features.
*   **Parametric Design:** *All* of the above should be controlled by user-adjustable parameters.

**Here's a summary of the specific parameters I want to be able to control:**

*   `type`:  (string, dropdown list) `["AAA","AA","C","D","custom"]`
*   `cells`: (integer) Number of cells
*   `custom_length`: (float) Length of custom battery in mm.
*   `custom_diameter`: (float) Diameter of custom battery in mm.
*   `space`: (float) Clearance around the battery in mm.
*   `wall`: (float) Wall thickness of the holder in mm.
* `build_plate_selector`: (integer, dropdown list) `[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]`
*  `build_plate_manual_x`: (integer) X dimension of manual build plate selection in mm.
*  `build_plate_manual_y`: (integer) Y dimension of manual build plate selection in mm.

**Library Usage:**

*   I will include a `build_plate.scad` library in the same folder to handle the build plate outline visualization. I do not need the assistant to provide me with this file.

I'm aiming for a design that's versatile and easy to use.  Could you please create an OpenSCAD script that meets these requirements?

[Assistant]
BatteryCustom.scad:
```
use <utils/build_plate.scad>
/* [Important bits] */
//Some common battery sizes.
type = "AA";// ["AAA":AAA, "AA":AA, "C":C, "D":D, "custom":Custom]

//The number of cells this will hold
cells = 1;

//Length for custom cells (pre-set: CR2032)
custom_length = 3.2;
//Diameter for custom cells (pre-set: CR2032)
custom_diameter = 20;

/* [Tweaks] */

//The gap around the cell, adjust this for a tight fit.
space = 1.5;
// Thickness of the walls of the holder. You may want to adjust this for a thin wall thickness that works well with your printer.
wall = 1.2;

/* [Build plate] */

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

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

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

build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);

if (type=="AAA"){
start(44.5,10.7);
};
if (type=="AA"){
start(50.5,14.5);
};
if (type=="C"){
start(50,26.2);
};
if (type=="D"){
start(61.5,34.2);
};
if (type=="custom"){
start(custom_length, custom_diameter);
};

module start(l,w){

length = l + space;
width = w + space;
translate([-((width+wall/2)*(cells-1)/2),0,width/2+wall/4])
holders (length,width);
}

module holders(length,width){
for(i = [0:cells-1]){
translate([(width+wall/2)*i,0,0])single();
}

module single(){
difference(){
cube ([width+wall, length+wall, width],center=true);
cube ([width*1.001, length*1.001 , width*1.001],center=true);
translate([0,0,width/1.2])rotate([0,45,0])cube ([width, (length+wall)*1.001, width],center=true);
translate([0,0,-width/1.2])rotate([0,45,0])cube ([width, (length+wall)*1.001, width],center=true);
}
translate([0,0,-width/2]) cube ([width+wall, length+wall, wall/2],center=true);
}
}

```


[User]
Okay, I'd like to design a 3D model of a stylized broccoli using OpenSCAD. I've got a bit of a concept already, but I need help making it parametric and more flexible.

My idea is that the broccoli will be built up from a trunk and recursively branching stems with little florets on the ends. I'd like to control the height of the main trunk, how many levels of branching there are, the angle at which the branches tilt away from the vertical, a rotation angle around the vertical (z) axis used at each branch point, and a height factor that determines how much each level of branching scales down in height.

Right now, I'm kind of faking the recursive behavior by manually chaining together several tree and branch modules, as you can see in the included code. I know that's not the best way to do it, so I'm looking for a solution that properly uses recursion. However, I understand that some OpenSCAD interfaces might not support true recursion, so maybe the best way is still a chain of function calls. Either way, it needs to work when the user changes parameters.

Specifically, I'd like to have these parameters:

*   `height`: The initial height of the main trunk.
*   `number_of_levels`: The number of branching levels in the broccoli structure (e.g. a value of 3 or 4 would be nice).
*   `TILTANGLE`: The angle at which the branches tilt away from the vertical axis.
*   `ZANGLE`: The rotation angle around the Z-axis applied at each branch point, allowing for some variation.
*   `HEIGHTFACT`: The factor by which the height of the branch decreases at each level.

The trunk and branches should be cylinders, with the trunk being thicker and each branching level getting slightly thinner. The florets can be cylinders or, if possible, something a little more organic looking, but let's stick with cylinders for now. Let's start simple.

Each level should ideally branch into 4 sub-branches that are evenly spaced around the Z-axis.

I'd also like to have control over the color of the trunk and branches (maybe use different shades of green to indicate structure?). Let's start with the trunk being a brighter green and the branches a slightly darker green.

I'd also want the branches to rotate a bit as they extend outwards, which i am doing by using the `ZANGLE` to offset the rotational angle of the branches at each level, and the `tilt` argument to add a tilt to the horizontal branches.

Finally, I'd prefer to create this model without relying on any external OpenSCAD libraries.

Can you generate a parametric OpenSCAD file that implements this design?

[Assistant]
recursive_tree_-_Broccoli_pseudo.scad:
```
height = 20;
number_of_levels=6; // [1:8]
TILTANGLE = 30;
ZANGLE = 120;
HEIGHTFACT = 0.75;

tree (0, height);

module tree(level, height){
	color("GreenYellow") cylinder(height, height / 3.0, height / 5.0);
	if (level < number_of_levels-1){
		branch1(level + 1, TILTANGLE, height, 1, 0, 0);
		branch1(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch1(level + 1, TILTANGLE, height, 0, 1, 0);
		branch1(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

module branch(level, tilt, height, x, y, z){
	color("LawnGreen") cylinder(h = height, r1 = height / 18.0, r2= height / 20.0);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree(level, height * HEIGHTFACT);
			}
		}
	}
}

/////////////
// Level 1 //
/////////////

module branch1(level, tilt, height, x, y, z){
	color("LawnGreen") cylinder(h = height, r1 = height / 18.0, r2= height / 20.0);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree1(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree1(level, height){
	color("GreenYellow") cylinder(height, height / 3.0, height / 5.0);
	if (level < number_of_levels-1){
		branch2(level + 1, TILTANGLE, height, 1, 0, 0);
		branch2(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch2(level + 1, TILTANGLE, height, 0, 1, 0);
		branch2(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 2 //
/////////////

module branch2(level, tilt, height, x, y, z){
	color("LawnGreen") cylinder(h = height, r1 = height / 18.0, r2= height / 20.0);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree2(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree2(level, height){
	color("GreenYellow") cylinder(height, height / 3.0, height / 5.0);
	if (level < number_of_levels-1){
		branch3(level + 1, TILTANGLE, height, 1, 0, 0);
		branch3(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch3(level + 1, TILTANGLE, height, 0, 1, 0);
		branch3(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 3 //
/////////////

module branch3(level, tilt, height, x, y, z){
	color("LawnGreen") cylinder(h = height, r1 = height / 18.0, r2= height / 20.0);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree3(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree3(level, height){
	color("GreenYellow") cylinder(height, height / 3.0, height / 5.0);
	if (level < number_of_levels-1){
		branch4(level + 1, TILTANGLE, height, 1, 0, 0);
		branch4(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch4(level + 1, TILTANGLE, height, 0, 1, 0);
		branch4(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 4 //
/////////////

module branch4(level, tilt, height, x, y, z){
	color("LawnGreen") cylinder(h = height, r1 = height / 18.0, r2= height / 20.0);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree4(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree4(level, height){
	color("GreenYellow") cylinder(height, height / 3.0, height / 5.0);
	if (level < number_of_levels-1){
		branch5(level + 1, TILTANGLE, height, 1, 0, 0);
		branch5(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch5(level + 1, TILTANGLE, height, 0, 1, 0);
		branch5(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 5 //
/////////////

module branch5(level, tilt, height, x, y, z){
	color("LawnGreen") cylinder(h = height, r1 = height / 18.0, r2= height / 20.0);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree5(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree5(level, height){
	color("GreenYellow") cylinder(height, height / 3.0, height / 5.0);
	if (level < number_of_levels-1){
		branch6(level + 1, TILTANGLE, height, 1, 0, 0);
		branch6(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch6(level + 1, TILTANGLE, height, 0, 1, 0);
		branch6(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 6 //
/////////////

module branch6(level, tilt, height, x, y, z){
	color("LawnGreen") cylinder(h = height, r1 = height / 18.0, r2= height / 20.0);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree6(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree6(level, height){
	color("GreenYellow") cylinder(height, height / 3.0, height / 5.0);
	if (level < number_of_levels-1){
		branch7(level + 1, TILTANGLE, height, 1, 0, 0);
		branch7(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch7(level + 1, TILTANGLE, height, 0, 1, 0);
		branch7(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 7 //
/////////////

module branch7(level, tilt, height, x, y, z){
	color("LawnGreen") cylinder(h = height, r1 = height / 18.0, r2= height / 20.0);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree7(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree7(level, height){
	color("GreenYellow") cylinder(height, height / 3.0, height / 5.0);
	if (level < number_of_levels-1){
		branch8(level + 1, TILTANGLE, height, 1, 0, 0);
		branch8(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch8(level + 1, TILTANGLE, height, 0, 1, 0);
		branch8(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}

/////////////
// Level 8 //
/////////////

module branch8(level, tilt, height, x, y, z){
	color("LawnGreen") cylinder(h = height, r1 = height / 18.0, r2= height / 20.0);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE, v = [0, 0, 1]) {
				tree8(level, height * HEIGHTFACT);
			}
		}
	}
}

module tree7(level, height){
	color("GreenYellow") cylinder(height, height / 3.0, height / 5.0);
	if (level < number_of_levels-1){
		branch8(level + 1, TILTANGLE, height, 1, 0, 0);
		branch8(level + 1, -TILTANGLE, height, 1, 0, 0);
		branch8(level + 1, TILTANGLE, height, 0, 1, 0);
		branch8(level + 1, -TILTANGLE, height, 0, 1, 0);
	}
}
```


[User]
Okay, I'd like to design a parametric tree generator in OpenSCAD. I've seen some examples of recursive tree designs, but I want something a little more flexible and customizable.

Here’s what I'm looking for:

**Core Functionality:**

*   **Recursive Tree Structure:** The tree should be built using a recursive function. This will handle the branching.
*   **Branching:** Each branch should have a similar structure, getting smaller and possibly thinner as the levels increase.
*   **Randomized Appearance:** I want the tree to have some randomness for a more organic look, but it should be repeatable given the same seed. The randomness should be applied to branch angles, lengths, and potentially widths.
*   **Number of Levels:** The user should be able to control how many levels deep the recursion goes.
*   **Trunk and Branch Colors:** I want control over the colors of different levels of the tree, perhaps using a gradient to make the trunk darker and branch colors lighter.
*   **Customizable Dimensions:** Base height, base width, and degree of reduction on branch length should all be parameters.

**Specific Parameters and Features:**

*   `seed`: An integer that controls the random number generator, to ensure trees are reproducible.
*   `number_of_levels`: An integer that determines the depth of the tree structure, the number of branch levels, probably in the range of 1-8, or perhaps more.
*   `height`: The height of the initial trunk.
*   `TILTANGLE`: The angle at which branches tilt from their parent branch.
*   `ZANGLE`: The rotation angle about the Z-axis before applying the tilt
*   `HEIGHTFACT`: A factor that determines the height of the next level branches, relative to the parent branches, so that the branches become shorter with each level
*  `height_to_with_bottom`: parameter that will determine the radius of a given branch at its base.
*  `height_to_with_top`: parameter that will determine the radius of a given branch at its top.
*   I'd like to see each branch spawn off in four directions, i.e. + and - tilt in both x and y directions.
*   I'd like the tree trunk and each branch to be represented by a cylinder

**Desired OpenSCAD Structure:**

I envision the code having:

*   A main `tree` module that will be recursive and create the branches using `branch` module.
*   The `branch` module should calculate rotations and translations before invoking the next level of the `tree` module.
*   A seed function should be initialized at the beginning of the code and used throughout the `rands` calls.

Can you generate this parametric OpenSCAD code for me? It seems like it might get a little complex if you add some extra randomness at each level.

[Assistant]
recursive_tree_-_pseudo_and_random.scad:
```
// From this seed, your tree will grow! Enter a number.
seed=42;

number_of_levels=6; // [1:8]

height = rands(10,30,1,seed);
TILTANGLE = rands(20,40,1,seed);
ZANGLE = rands(0,360,1,seed);
HEIGHTFACT = rands(0.6,0.9,1,seed);
height_to_with_bottom = rands(15,30,1,seed);
height_to_with_top = rands(20,40,1,seed);

tree (0, height[0]);

module tree(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom[0], height / height_to_with_top[0]);
	if (level < number_of_levels-1){
		branch1(level + 1, TILTANGLE[0], height, 1, 0, 0);
		branch1(level + 1, -TILTANGLE[0], height, 1, 0, 0);
		branch1(level + 1, TILTANGLE[0], height, 0, 1, 0);
		branch1(level + 1, -TILTANGLE[0], height, 0, 1, 0);
	}
}

module branch(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom[0], r2= height / height_to_with_top[0]);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE[0], v = [0, 0, 1]) {
				tree(level, height * HEIGHTFACT[0]);
			}
		}
	}
}

/////////////
// Level 1 //
/////////////

module branch1(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom[0], r2= height / height_to_with_top[0]);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE[0], v = [0, 0, 1]) {
				tree1(level, height * HEIGHTFACT[0]);
			}
		}
	}
}

module tree1(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom[0], height / height_to_with_top[0]);
	if (level < number_of_levels-1){
		branch2(level + 1, TILTANGLE[0], height, 1, 0, 0);
		branch2(level + 1, -TILTANGLE[0], height, 1, 0, 0);
		branch2(level + 1, TILTANGLE[0], height, 0, 1, 0);
		branch2(level + 1, -TILTANGLE[0], height, 0, 1, 0);
	}
}

/////////////
// Level 2 //
/////////////

module branch2(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom[0], r2= height / height_to_with_top[0]);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE[0], v = [0, 0, 1]) {
				tree2(level, height * HEIGHTFACT[0]);
			}
		}
	}
}

module tree2(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom[0], height / height_to_with_top[0]);
	if (level < number_of_levels-1){
		branch3(level + 1, TILTANGLE[0], height, 1, 0, 0);
		branch3(level + 1, -TILTANGLE[0], height, 1, 0, 0);
		branch3(level + 1, TILTANGLE[0], height, 0, 1, 0);
		branch3(level + 1, -TILTANGLE[0], height, 0, 1, 0);
	}
}

/////////////
// Level 3 //
/////////////

module branch3(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom[0], r2= height / height_to_with_top[0]);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE[0], v = [0, 0, 1]) {
				tree3(level, height * HEIGHTFACT[0]);
			}
		}
	}
}

module tree3(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom[0], height / height_to_with_top[0]);
	if (level < number_of_levels-1){
		branch4(level + 1, TILTANGLE[0], height, 1, 0, 0);
		branch4(level + 1, -TILTANGLE[0], height, 1, 0, 0);
		branch4(level + 1, TILTANGLE[0], height, 0, 1, 0);
		branch4(level + 1, -TILTANGLE[0], height, 0, 1, 0);
	}
}

/////////////
// Level 4 //
/////////////

module branch4(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom[0], r2= height / height_to_with_top[0]);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE[0], v = [0, 0, 1]) {
				tree4(level, height * HEIGHTFACT[0]);
			}
		}
	}
}

module tree4(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom[0], height / height_to_with_top[0]);
	if (level < number_of_levels-1){
		branch5(level + 1, TILTANGLE[0], height, 1, 0, 0);
		branch5(level + 1, -TILTANGLE[0], height, 1, 0, 0);
		branch5(level + 1, TILTANGLE[0], height, 0, 1, 0);
		branch5(level + 1, -TILTANGLE[0], height, 0, 1, 0);
	}
}

/////////////
// Level 5 //
/////////////

module branch5(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom[0], r2= height / height_to_with_top[0]);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE[0], v = [0, 0, 1]) {
				tree5(level, height * HEIGHTFACT[0]);
			}
		}
	}
}

module tree5(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom[0], height / height_to_with_top[0]);
	if (level < number_of_levels-1){
		branch6(level + 1, TILTANGLE[0], height, 1, 0, 0);
		branch6(level + 1, -TILTANGLE[0], height, 1, 0, 0);
		branch6(level + 1, TILTANGLE[0], height, 0, 1, 0);
		branch6(level + 1, -TILTANGLE[0], height, 0, 1, 0);
	}
}

/////////////
// Level 6 //
/////////////

module branch6(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom[0], r2= height / height_to_with_top[0]);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE[0], v = [0, 0, 1]) {
				tree6(level, height * HEIGHTFACT[0]);
			}
		}
	}
}

module tree6(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom[0], height / height_to_with_top[0]);
	if (level < number_of_levels-1){
		branch7(level + 1, TILTANGLE[0], height, 1, 0, 0);
		branch7(level + 1, -TILTANGLE[0], height, 1, 0, 0);
		branch7(level + 1, TILTANGLE[0], height, 0, 1, 0);
		branch7(level + 1, -TILTANGLE[0], height, 0, 1, 0);
	}
}

/////////////
// Level 7 //
/////////////

module branch7(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom[0], r2= height / height_to_with_top[0]);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE[0], v = [0, 0, 1]) {
				tree7(level, height * HEIGHTFACT[0]);
			}
		}
	}
}

module tree7(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom[0], height / height_to_with_top[0]);
	if (level < number_of_levels-1){
		branch8(level + 1, TILTANGLE[0], height, 1, 0, 0);
		branch8(level + 1, -TILTANGLE[0], height, 1, 0, 0);
		branch8(level + 1, TILTANGLE[0], height, 0, 1, 0);
		branch8(level + 1, -TILTANGLE[0], height, 0, 1, 0);
	}
}

/////////////
// Level 8 //
/////////////

module branch8(level, tilt, height, x, y, z){
	//color("LawnGreen") cylinder(h = height, r1 = height / height_to_with_bottom[0], r2= height / height_to_with_top[0]);
	translate(v = [0, 0, height]) {
		rotate(a = tilt, v = [x, y, z]) {
			rotate(a = ZANGLE[0], v = [0, 0, 1]) {
				tree8(level, height * HEIGHTFACT[0]);
			}
		}
	}
}

module tree7(level, height){
	color([ 150/255, (80+level*(175/(number_of_levels-1)))/255, 0/255 ]) cylinder(height, height / height_to_with_bottom[0], height / height_to_with_top[0]);
	if (level < number_of_levels-1){
		branch8(level + 1, TILTANGLE[0], height, 1, 0, 0);
		branch8(level + 1, -TILTANGLE[0], height, 1, 0, 0);
		branch8(level + 1, TILTANGLE[0], height, 0, 1, 0);
		branch8(level + 1, -TILTANGLE[0], height, 0, 1, 0);
	}
}

```


[User]
Okay, I'm looking to create a parametric fan guard, and I've got an existing design I like but want to have the flexibility to modify it easier with parameters. I'd like to be able to specify the following:

*   **Fan Size:** The size of the fan (e.g., 25mm, 30mm, 40mm, 50mm) which would determine the overall dimensions of the guard. This should be a single dimension representing the side length of a square fan.

*   **Mounting Hole Spacing:** The distance between the mounting holes on the fan, also usually a single dimension, for the screws.  This is related to the fan size, but not always identical.

*   **Mounting Hole Diameter:** The diameter of the mounting holes for the screws.

*   **Mesh Type:** I'd like to be able to select between different mesh patterns, specifically "hex", "square", "radial_circles", and "radial_poly".

*   **Mesh Cell Size:**  The size of the individual openings in the mesh.

*   **Mesh Thickness:** The thickness of the mesh material itself.

*   **Mesh Clearance:**  An additional distance between the mesh and the fan. I'd want this to be additive, so the total distance would be mesh thickness + mesh clearance.

*   **Mesh Density Ratio:** A ratio, likely a percentage, that affects the thickness of the mesh strands. This is a way to adjust the strength of the mesh and the overall open area.  It would need to be tuneable. I don't need a 1:1 match of the ratio and the thickness, but rather that it could adjust in a linear, understandable fashion.

*   **Minimum Side Wall Thickness:**  The minimum thickness of the solid outer border around the fan guard.

*  **Outer Roundness:** A value that controls the roundness of the corners of the fan guard, perhaps as a ratio of the total height of the fan guard. The actual height may be the mesh thickness + the mesh clearance. A value of 0 would represent completely squared corners, 100 would be almost completely rounded. I'd like to think of it in percentages.

*   **Mesh Radial Offset:** This one is specific to the "radial_circles" and "radial_poly" mesh types. It affects the starting point of the radial mesh pattern, which can improve airflow. I'd expect a similar percentage type scale, with a range from 0 to 100 where 0 might be the center and 100 might be the outer edge.

* **Tolerance:** A value for small discrepancies in rendering so that the model renders well.

*   **File Resolution Parameters:** Parameters for `fa` and `fs` that control the fineness of the model.

I have an existing SCAD file that accomplishes most of this, but I'm trying to make it more readable and modifiable. I'd like the new file to be fully parametric so that each of these values can be adjusted. I'd like it laid out clearly with good comments explaining each section.

I expect this will need a hull, and some differences and unions.
I don't need to use any libraries in particular, this is all basic geometry.

Could you help me with that?

[Assistant]
fanguard.scad:
```
//
// parametric fanguard (rev 1.01) - 20130806-1638
//
// (c)Jeremie Francois (jeremie.francois@gmail.com)
//	http://www.thingiverse.com/MoonCactus
//	http://tridimake.blogspot.com
//
// Licence: Attribution - Share Alike - Creative Commons
//

// Fan size (eg. 25, 30, 40, 50 mm side length)
fan_side_length=30;

// Distance between two consecutive mounting fan screws (respectively 20, 24, 32, 40 mm)
mount_hole_width=24;

// Mounting screw diameter (respectively 3, 3, 3.5, 4.5 mm)
mount_hole_d=3;

// The mesh kind
mesh_kind="hex"; // [hex,square,radial_circles,radial_poly]

// The mesh cell size (mm)
mesh_holes_d=5;

// The mesh thickness (mm)
mesh_thickness=1;

// Additional distance between the mesh and the fan (add it to the mesh thickness for the total height) (mm)
mesh_clearance=1;

// Mesh string thickness ratio (depends on your nozzle and gcode generator); default gives about 0.8 mm (two passes)
mesh_density_ratio= 98; // [90:120]

// Minimum side wall thickness (mm)
solid_outer_border=1;

// Outer roundness (ratio over the total height; values over 50% ask for a thick wall also)
outer_roundness=50; // [0:100]

// Mesh radial offset for circular meshes (tune it for a better flow, when the outer ring is the most "open")
mesh_offset= 68; // [0:100]

tol=0.1+0;
$fa=1+0;
$fs=0.33+0;

dholes= mesh_holes_d;
marginhole= (fan_side_length-mount_hole_width)/2;
roundness= outer_roundness * (mesh_thickness + mesh_clearance) / 100;

function drot(radius, spacing)= 360 / round( (2 * 3.1415926 * radius) / spacing );

module wedge(radius,dholes)
{
	w= (drot(radius, dholes)/2) * mesh_density_ratio / 125;
	dl= (mesh_holes_d) * mesh_density_ratio / 135;
	translate([0,0,-tol])
	scale([1,1,mesh_thickness+2*tol])
	hull()
	{
		rotate([0,0,-w]) translate([radius-dl/2,0,0])	cylinder(r=0.1,$fn=4);
		rotate([0,0,+w]) translate([radius-dl/2,0,0])	cylinder(r=0.1,$fn=4);

		translate([radius+1.05*dl/2,0,0])	cylinder(r=0.1,$fn=4);

		rotate([0,0,-w]) translate([radius+dl/2,0,0])	cylinder(r=0.1,$fn=4);
		rotate([0,0,+w]) translate([radius+dl/2,0,0])	cylinder(r=0.1,$fn=4);
	}
}

union()
{
	difference()
	{
		hull()
		{
			for(i=[-1,+1]) for(j=[-1,+1])
				translate([i*(fan_side_length/2-roundness),j*(fan_side_length/2-roundness),0])
					translate([0,0,roundness])
					{
						intersection() { sphere(r=roundness); translate([0,0,-roundness-tol]) cylinder(r=roundness+tol, h=roundness+tol); }
						cylinder(r=roundness,h=mesh_thickness+mesh_clearance-roundness);
					}
		}
		// Carve main section and screw holes
		translate([0,0,-tol]) scale([1,1,mesh_thickness+mesh_clearance+2*tol])
		{
			cylinder(r=fan_side_length/2-solid_outer_border);
			for(i=[-1,+1]) for(j=[-1,+1])
				translate([i*(fan_side_length/2-marginhole),j*(fan_side_length/2-marginhole),0])
					cylinder(r=mount_hole_d/2);
		}
	}

	difference()
	{
		cylinder(r=fan_side_length/2-solid_outer_border+tol, h=mesh_thickness);
		// Hey... if you find this readable, you are mad :)
		if(mesh_kind=="radial_circles" || mesh_kind=="radial_poly")
		{
			for(radius=[mesh_offset*mesh_holes_d/100:mesh_holes_d*0.95:fan_side_length/2])
				// circumference= 2*PI*radius
				for(rot=[0:drot(radius, dholes):359.9])
					rotate([0,0,rot])
						if(mesh_kind=="radial_poly")
							wedge(radius,dholes);
						else if(mesh_kind=="radial_circles")
						{
							translate([radius,0,-tol])
							cylinder(r=38*mesh_holes_d/mesh_density_ratio, h=mesh_thickness+2*tol);
						}
		}
		else // hex or square
		{
			for(i=[0:dholes:fan_side_length/2+dholes])
				for(j=[0:dholes:fan_side_length/2+dholes])
					for(si=[-1,+1]) for(sj=[-1,+1]) scale([si,sj,1])
						if(mesh_kind=="hex")
						{
							translate([i + (((j+dholes) / dholes + 1) % 2) * dholes/2 ,(j)*0.9,-tol]) // HUH!
								rotate([0,0,30])
									cylinder(r=50*mesh_holes_d/mesh_density_ratio, $fn=6, h=mesh_thickness+2*tol);
						}
						else if(mesh_kind=="square")
						{
							translate([i,j,-tol])
								cube([
									75*mesh_holes_d/mesh_density_ratio,
									75*mesh_holes_d/mesh_density_ratio,
									mesh_thickness*3+2*tol],center=true);
						}
		}
	}

}
```


[User]
Okay, I'm looking to create a customizable button system for a project, and I'd like your help designing the OpenSCAD files for it. I'm envisioning a system where the buttons can be easily tiled together, and the user can adjust various parameters to fit their needs.

Here's a breakdown of the features and parameters I'd like to control:

**Button Characteristics:**

*   **Button Character:** I need to be able to engrave or extrude a character onto the button face. I'd like to specify the character itself (e.g., "X", "A", "1", etc.).
*   **Character Rotation:** The character needs to be rotatable on the button's face. I'll need to set the angle of rotation, in degrees.
*   **Character Depth:**  The depth of the engraved/extruded character should be adjustable.
*   **Button Throw:** This is the vertical distance the button needs to travel to actuate fully.
*   **Button Diameter:**  The overall diameter of the button itself.
*   **Button Extra Z Height:** I need a parameter to add a bit of extra height to the top of the button, past the throw.
*   **Button Edge Bevel:** The button edge needs a bevel, with both the radius of the bevel and a smoothing factor that controls the number of facets used to create that rounded edge being adjustable.
*   **Lever Thickness:** The thickness of the button's lever arm that will actuate a switch.
*   **Fulcrum Diameter:** The diameter of the cylindrical fulcrum that the lever arm pivots around.
*   **Fulcrum Latch Depth:** The depth of the latch area that holds the fulcrum in place.

**Case Characteristics:**

*   **Top Thickness:** The thickness of the top of the case enclosure.
*   **Wall Thickness:** The general thickness of the case walls.
*   **Minimum Spacer Thickness:** A minimum height for the spacers used inside the case; This will be used to calculate the total spacer height.
*   **Wire Escape Hole Diameter:** The diameter of a hole in the case for wires to pass through.
*  **Gap:**  A small gap to ensure the button lever does not bind against the wall.
* **Print Gap**: A gap to ensure that parts do not print fused together.

**Switch Parameters (For the Electrical Switch):**

*   **Switch Thread Diameter:** The diameter of the switch's mounting threads.
*  **Switch X, Y, Z Dimensions:** The overall bounding box dimensions of the switch body.
*   **Switch Thread Length:** The length of the threads on the switch.
*   **Switch Max Throw Distance:** The maximum travel distance of the switch's button or actuator.
*   **Switch Button Diameter:** The diameter of the switch button.
*   **Switch Nut Z Height:**  The height or thickness of the nut that secures the switch.
*  **Switch Nut Diameter:** The diameter of the nut for the switch
* **Switch X and Y Center:** The X and Y position of the switch within it's bounding box.

**Lever Parameters:**

*   **Lever Length:** The overall length of the lever.
*   **Lever Button Offset:** The offset of the button from the lever's pivot point.
*   **Lever Switch Offset:** The offset of the switch from the lever's pivot point.

I think that covers all the parameters. Ideally, I'd like to have modules for the button itself, the switch (including its nut), the outer case, a middle case section that includes the fulcrum point, a module for spacers, and some for assembling all the components. I also want a "printer friendly" module that places all parts flat on the bed for easy printing.

Also, could you include the "write.scad" library for engraving the text on the button? This seems to be a standard tool for text manipulation. I don't need any other libraries right now.

Thanks! I'm excited to see what you come up with.

[Assistant]
Button.scad:
```
include <write.scad>
/*[Active Views]*/
printerFriendlyView=false;//[true false]
assembledUnitView=true;//[true false]
assembledUnitDepressedButtonView=true;//[true false]

/*[Button]*/
buttonCharictor="X";
//In some use cases the button may need to be rotate for user recognition
buttonCharictorRotation=90;
buttonCharictorDepth=.5;
//This is the amount that the user must depress the button to get full actuation
buttonThrow=5;
//this determines the pad volume of the button
buttonDiameter=20;
//
buttonExtraZHeight=1;
buttonEdgeBevelRadius=3;
buttonEdgeBevelSmoothingFactor=5;
//This is a variable for adding strength/reducing volume
leverThickness=2;
fulcrumDiameter=2;
fulcrumLatchDepth=1;

/*[Case]*/
topThickness=1;
wallThickness=1;
minimumSpacerThickness=.3;
wireEscapeHoleDiameter=7;
//a fudge factor to prevent the button lever from binding against the wall
gap=.4;
printGap=10;

/* [Switch parameters]*/
//This is the diameter mounting treads for the switch
switchTrheadDiameter=10.2;//defaults values are for digikey part # 561PB-ND  I chose it due to its cost and easy to assemble
//this defines the enclosed volume of the switch. Note the wire exit is build into the X Dimention
switchXdim=30;
switchYdim=15;
switchZdim=8;
switchThreadLength=10.5;
switchMaxThrowDistance=5;
switchButtonDiameter=5.5;
switchNutZHeight=4;
switchNutDiameter=13;
switchXCenter=6;
switchYCetner=7.5;
/*[Lever Parameters]*/
//When I think about how best to handle these they will be automatically calculated, but for now i am leaving these user defined.
leverLength=40;
leverButtonOffset=30;
leverSwitchOffset=30;

/*Calculation Block*/
maxAngleOfRotation=atan(switchMaxThrowDistance/leverSwitchOffset);
expationDueToSkewing=(leverSwitchOffset+buttonDiameter)/cos(maxAngleOfRotation)-(leverSwitchOffset+buttonDiameter);
fulcrumCenterHeight=(switchThreadLength+switchZdim+switchMaxThrowDistance+fulcrumDiameter/2);
innerWallZ=switchThreadLength+switchZdim-switchNutZHeight;
innerWallX=leverLength+fulcrumDiameter/2+wallThickness*2;
innerWallY=buttonDiameter+fulcrumLatchDepth*2;
leverX=buttonDiameter;
fulcrumLength=2*fulcrumLatchDepth+buttonDiameter;
spacerThickness=innerWallZ-topThickness-switchZdim;
numberOfSpacers=((spacerThickness-spacerThickness%minimumSpacerThickness)/minimumSpacerThickness);
outerCaseZ=fulcrumCenterHeight+fulcrumDiameter/2+topThickness;
outerCaseX=innerWallX+2*wallThickness;
outerCaseY=innerWallY+2*wallThickness;

/* Parts Modules block*/
module switch(){
union(){
cylinder(r=switchButtonDiameter/2,h=(switchThreadLength+switchZdim+switchMaxThrowDistance));
cylinder(r=switchTrheadDiameter/2,h=(switchThreadLength+switchZdim));
translate([-switchXCenter,-switchYCetner,0])cube([switchXdim,switchYdim,switchZdim]);
translate([0,0,innerWallZ])cylinder(r=switchNutDiameter/2,h=switchNutZHeight);
}
}

module button(){
	translate([leverButtonOffset,0,-fulcrumDiameter/2]) difference(){
		union(){
			difference(){
				hull(){
					for( i=[1:buttonEdgeBevelSmoothingFactor]){
						cylinder(r=buttonDiameter/2-buttonEdgeBevelRadius+buttonEdgeBevelRadius*2*sin(i*90/buttonEdgeBevelSmoothingFactor)/2,h=(leverThickness+topThickness+buttonThrow+buttonExtraZHeight-buttonEdgeBevelRadius+buttonEdgeBevelRadius*cos(i*90/buttonEdgeBevelSmoothingFactor)));
					}
				}
		translate([0,0,leverThickness+topThickness+buttonThrow+buttonExtraZHeight-buttonCharictorDepth/2])rotate([0,0,buttonCharictorRotation])write(buttonCharictor,t=buttonCharictorDepth,h=buttonDiameter/2,center=true);
			}
			translate([-leverButtonOffset,-buttonDiameter/2,0])cube([leverLength,buttonDiameter,leverThickness]);
			translate([-leverButtonOffset,-buttonDiameter/2-fulcrumLatchDepth,leverThickness/2])rotate([-90,0,0])cylinder(r=fulcrumDiameter/2,h=fulcrumLength);
		}
	translate([leverSwitchOffset-leverButtonOffset,0,-switchNutZHeight])rotate([0,-maxAngleOfRotation,0])cylinder(r=1.1*switchNutDiameter/2,h=switchNutZHeight);
	}
}
module outerCase(){
	difference(){
		translate([-2*wallThickness,-outerCaseY/2,0])cube([outerCaseX,outerCaseY,outerCaseZ]);
		translate([-wallThickness,-innerWallY/2,0])cube([innerWallX,innerWallY,outerCaseZ-topThickness]);
		translate([-innerWallX/2,0])rotate([90,0,90])cylinder(r=wireEscapeHoleDiameter/2,innerWallX+innerWallY);
		translate([leverButtonOffset,0,outerCaseZ-topThickness-gap])cylinder(r=2*expationDueToSkewing+buttonDiameter/2,h=(topThickness*4));
	}
}
module casemiddle(){
	difference(){
		union(){
			difference(){
				hull(){
					translate([0,-fulcrumLength/2,fulcrumCenterHeight])rotate([-90,0,0])cylinder(r=fulcrumDiameter/2,h=fulcrumLength);
					translate([0,-fulcrumLength/2,fulcrumDiameter/2])rotate([-90,0,0])cylinder(r=fulcrumDiameter/2,h=fulcrumLength);
					translate([leverSwitchOffset,-(fulcrumLength)/2,fulcrumDiameter/2])rotate([-90,0,0])cylinder(r=fulcrumDiameter/2,h=fulcrumLength);
					translate([-fulcrumDiameter/2,-innerWallY/2,0]) cube([fulcrumDiameter,innerWallY,innerWallZ]);
				}
				translate([0,-(fulcrumLength),fulcrumCenterHeight])rotate([-90,0,0])cylinder(r=1.10*fulcrumDiameter/2,h=2*fulcrumLength);
				rotate([0,maxAngleOfRotation,0])translate([-leverLength,-buttonDiameter/2,fulcrumCenterHeight-1*leverThickness])cube([2*leverLength,buttonDiameter,4*leverThickness]);
			}
			translate([-fulcrumDiameter/2,-innerWallY/2,0]) cube([innerWallX,,innerWallY,innerWallZ]);
		}
	translate([-fulcrumDiameter/2+wallThickness,-innerWallY,0])cube([innerWallX-2*wallThickness,2*innerWallY,innerWallZ-topThickness]);
	translate([leverSwitchOffset,0,0])cylinder(r=switchTrheadDiameter/2,h=(gap+innerWallZ*2));
	translate([-innerWallX/2,0])rotate([90,0,90])cylinder(r=wireEscapeHoleDiameter/2,innerWallX+innerWallY);
	}
}
module spacerStackForAssemblyCheck()
{
	translate([leverSwitchOffset,0,innerWallZ-spacerThickness-topThickness])cylinder(r=switchNutDiameter/2,h=(spacerThickness));
}
module spacersForPrint(){
//I need to think about how to do this whithout a while loop...
	difference() {
		cylinder(r=switchNutDiameter/2,h=(spacerThickness));
	translate([0,0,-spacerThickness])cylinder(r=gap/2+switchTrheadDiameter/2,h=(spacerThickness*3));
	}
}
/*Assembly/ print orentation block*/
module printerFriendly(){
translate([0,0,outerCaseZ])rotate([180,0,0])outerCase();
translate([0,leverX /2+outerCaseY/2+printGap,fulcrumDiameter/2])button();
translate([0, -outerCaseY/2-printGap,innerWallY/2])rotate([90,0,0])casemiddle();
//spacers need to be added
translate([(-switchNutDiameter/2-printGap),0,0])spacersForPrint();
}
module assembledUnit()
{
casemiddle();
translate([0,0,-(-fulcrumDiameter/2-(switchThreadLength+switchZdim+switchMaxThrowDistance)-fulcrumDiameter/2)-fulcrumDiameter/2])button();
translate([leverSwitchOffset,0,0])rotate([0,0,180])switch();
spacerStackForAssemblyCheck();
outerCase();
}
module assembledUnitDepressedButton()
{
casemiddle();
translate([leverSwitchOffset,0,0])rotate([0,0,180])switch();
translate([0,0,-(-fulcrumDiameter/2-(switchThreadLength+switchZdim+switchMaxThrowDistance)-fulcrumDiameter/2)-fulcrumDiameter/2])rotate([0,maxAngleOfRotation,0])button();
spacerStackForAssemblyCheck();
outerCase();
}

/*Scratch block/ display block*/

;
if( printerFriendlyView){
printerFriendly();
}
if( assembledUnitView){
translate([-outerCaseX-printGap,-outerCaseY,0])assembledUnit();
}
if( assembledUnitDepressedButtonView){
translate([-outerCaseX-printGap,outerCaseY,0])assembledUnitDepressedButton();
}
```
Write.scad:
```
/* 	Version 3
	Added support for font selection (default is Letters.dxf)
	Added WriteCube module
	Added Rotate for text (rotates on the plane of the text)
	Added writesphere
	Added space=     (spacing between characters in char widths) def=1
	Added writecylinder()

 By Harlan Martin
 harlan@sutlog.com
 January 2012

 (The file TestWrite.scad gives More usage examples)
 (This module requires the file Letters.dxf to reside in the same folder)
 (The file Letters.dfx was created with inkscape..Each letter is in its own layer)
 (This module seperates each letter in the string and imports it from Letters.dfx)

*/

	pi=3.1415926535897932384626433832795028841971693993751058209;
	pi2=pi*2;

// These control the default values for write() writesphere() writecube()
// if the parameters are not included in the call. Feel free to set your own
// defaults.

//default settings
	center=false;
	h = 4;			 //mm letter height
	t = 1; 			//mm letter thickness
	space =1; 			//extra space between characters in (character widths)
	rotate=0;			// text rotation (clockwise)
	font = "Letters.dxf";	//default for aditional fonts

// write cube defaults
	face = "front";	 // default face (top,bottom,left,right,back,front)
	up =0;		 //mm up from center on face of cube
	down=0;
	right =0;		 //mm left from center on face of cube
	left=0;

// write sphere defaults
	rounded=false;	 //default for rounded letters on writesphere
	north=0; 		// intial text position (I suggest leave these 0 defaults)
	south=0;
	east=0;
	west=0;
	spin=0;
// writecylinder defaults
	middle=0;     //(mm toward middle of circle)
	ccw=false;   //write on top or bottom in a ccw direction
 	r1=0; 	//(not implimented yet)
	r2=0;	 	//(not implimented yet)

// Contact me if your interested in how to make your own font files
// Its tedious and time consuming, but not very hard

module writecylinder(text,where,radius,height){
	wid=(.125* h *5.5 * space);
	widall=wid*(len(text)-1)/2;
	//angle that measures width of letters on sphere
	function NAngle(radius)=(wid/(pi2*radius))*360;
	//angle of half width of text
	function mmangle(radius)=(widall/(pi2*radius)*360);

	if ((face=="top")||(face=="bottom") ){
		if (face=="top" ){
			if (center==true){
				writecircle(text,where+[0,0,height/2],radius-h,rotate=rotate,font=font,h=h,t=t,
				space=space,east=east,west=west,middle=middle,ccw=ccw);
			}else{
				writecircle(text,where+[0,0,height],radius-h,rotate=rotate,font=font,h=h,t=t,
				space=space,east=east,west=west,middle=middle,ccw=ccw);
			}
		}else{
			rotate(180,[1,0,0])
			if (center==true){
				writecircle(text,where+[0,0,height/2],radius-h,rotate=rotate,font=font,h=h,t=t,
				space=space,east=east,west=west,middle=middle,ccw=ccw);
			}else{
				writecircle(text,where+[0,0,0],radius-h,rotate=rotate,font=font,h=h,t=t,
				space=space,east=east,west=west,middle=middle,ccw=ccw);
			}
		}

	}else{
//		if (radius>0){
			if (center==true)  {
				rotate(-mmangle(radius)*(1-abs(rotate)/90),[0,0,1])
				translate(where)
				writethecylinder(text,where,radius,height,r1=radius,r2=radius,h=h,
					rotate=rotate,t=t,font=font,face=face,up=up,down=down,
					east=east,west=west,center=center,space=space,rounded=rounded);
			} else{
				rotate(-mmangle(radius)*(1-abs(rotate)/90),[0,0,1])
				translate(where+[0,0,height/2])
					writethecylinder(text,where,radius,height,r1=radius,r2=radius,h=h,
					rotate=rotate,t=t,font=font,face=face,up=up,down=down,
					east=east,west=west,center=center,space=space,rounded=rounded);
			}
// the remarked out code is for cone shaped cylinders (not complete)
//		}else{
//			if (center==true)  {
//				rotate(-mmangle(radius)*(1-abs(rotate)/90),[0,0,1])
//				translate(where)
//				writethecylinder(text,where,radius,height,r1=r1,r2=r2,h=h,
//					rotate=rotate,t=t,font=font,face=face,up=up,down=down,
//					east=east,west=west,center=center,space=space,rounded=rounded);
//			} else{
//				rotate(-mmangle(radius)*(1-abs(rotate)/90),[0,0,1])
//				translate(where+[0,0,height/2])
//					writethecylinder(text,where,radius,height,r1=r1,r2=r2,h=h,
//					rotate=rotate,t=t,font=font,face=face,up=up,down=down,
//					east=east,west=west,center=center,space=space,rounded=rounded);
//			}
//		}
	}
}
module writecircle(text,where,radius){
	wid=(.125* h *5.5 * space);
	widall=wid*(len(text)-1)/2;
	//angle that measures width of letters on sphere
	function NAngle(radius)=(wid/(pi2*radius))*360;
	//angle of half width of text
	function mmangle(radius)=(widall/(pi2*radius)*360);

	if (ccw==true){
		rotate(-rotate+east-west,[0,0,1]){
			rotate(-mmangle(radius-middle),[0,0,1]){
			translate(where)
				for (r=[0:len(text)-1]){
					rotate(-90+r*NAngle(radius-middle),[0,0,1]) // bottom out=-270+r
					translate([radius-middle,0,0])
					//rotate(90,[1,0,0])
					//rotate(90,[0,1,0])
					rotate(-270,[0,0,1])  // flip text (botom out = -270)
					write(text[r],center=true,h=h,t=t,font=font);
				}
			}
		}
	}else{
		rotate(-rotate-east+west,[0,0,1]){
			rotate(mmangle(radius-middle),[0,0,1]){
			translate(where)
				for (r=[0:len(text)-1]){
					rotate(90-r*NAngle(radius-middle),[0,0,1]) // bottom out=-270+r
					translate([radius-middle,0,0])
					//rotate(90,[1,0,0])
					//rotate(90,[0,1,0])
					rotate(270,[0,0,1])  // flip text (botom out = -270)
					write(text[r],center=true,h=h,t=t,font=font);
				}
			}
		}
	}

}
module writethecylinder(text,where,radius,height,r1,r2){
	wid=(.125* h *5.5 * space);
	widall=wid*(len(text)-1)/2;
	//angle that measures width of letters on sphere
	function NAngle(radius)=(wid/(pi2*radius))*360*(1-abs(rotate)/90);
	//angle of half width of text

	function mmangle(radius)=(widall/(pi2*radius)*360);
			translate([0,0,up-down])
			rotate(east-west,[0,0,1])
			for (r=[0:len(text)-1]){
				rotate(-90+(r*NAngle(radius)),[0,0,1])
				translate([radius,0,-r*((rotate)/90*wid)+(len(text)-1)/2*((rotate)/90*wid)])
				rotate(90,[1,0,0])
				rotate(90,[0,1,0])
				write(text[r],center=true,h=h,rotate=rotate,t=t,font=font);
		//echo("zloc=",height/2-r*((rotate)/90*wid)+(len(text)-1)/2*((rotate)/90*wid));
			}

}

module writesphere(text,where,radius){
	wid=(.125* h *5.5 * space);
	widall=wid*(len(text)-1)/2;

	echo("-----------------",widall,wid,mmangle(radius));
	//angle that measures width of letters on sphere
	function NAngle(radius)=(wid/(pi2*radius))*360;
	//angle of half width of text
	function mmangle(radius)=(widall/(pi2*radius)*360);

	rotate(east-west,[0,0,1]){
	rotate(south-north,[1,0,0]){
	rotate(spin,[0,1,0]){
	rotate(-mmangle(radius),[0,0,1]){
		if ( rounded== false ){
			translate(where)
			for (r=[0:len(text)-1]){
				rotate(-90+r*NAngle(radius),[0,0,1])
				translate([radius,0,0])
				rotate(90,[1,0,0])
				rotate(90,[0,1,0])
				write(text[r],center=true,h=h,rotate=rotate,t=t,font=font);
			}
		}else{
			difference(){
				translate(where)
				for (r=[0:len(text)-1]){
					rotate(-90+r*NAngle(radius),[0,0,1])
					translate([radius,0,0])
					rotate(90,[1,0,0])
					rotate(90,[0,1,0])
					write(text[r],center=true,h=h,rotate=rotate,t=t*2+h,font=font);
				}
				difference(){ //rounded outside
					sphere(radius+(t*2+h)*2);
					sphere(radius+t/2);
				}
				sphere(radius-t/2); // rounded inside for indented text
			}
		}
	}
}}}
}

module writecube(text,where,size){
	if (str(size)[0] != "["){
		// its a square cube (size was not a matrix so make it one)
		writethecube(text,where,[size,size,size],h=h,rotate=rotate,space=space,
		t=t,font=font,face=face,up=up,down=down,right=right,left=left);

	}else{
		// its not square
		writethecube(text,where,size,h=h,rotate=rotate,space=space,
		t=t,font=font,face=face,up=up,down=down,right=right,left=left);
	}
}
// I split the writecube module into 2 pieces.. easier to add features later
module writethecube(text,where,size){
		if (face=="front") {
			translate([where[0]+right-left,where[1]-size[1]/2,where[2]+up-down])
			rotate(90,[1,0,0])
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
		if (face=="back") {
			translate([where[0]+right-left,where[1]+size[1]/2,where[2]+up-down])
			rotate(90,[1,0,0])   // rotate around the x axis
			rotate(180,[0,1,0])  // rotate around the y axis (z before rotation)
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
		if (face=="left") {
			translate([where[0]-size[0]/2,where[1]-right+left,where[2]+up-down ])
			rotate(90,[1,0,0])   // rotate around the x axis
			rotate(90,[0,-1,0])  // rotate around the y axis  (z before rotation)
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
		if (face=="right") {
			translate([where[0]+size[0]/2,where[1]+right-left,where[2] +up-down])
			rotate(90,[1,0,0])   // rotate around the x axis
			rotate(90,[0,1,0])  // rotate around the y axis  (z before rotation)
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
		if (face=="top") {
			translate([where[0]+right-left,where[1]+up-down,where[2]+size[2]/2 ])
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
		if (face=="bottom") {
			translate([where[0]+right-left,where[1]-up+down,where[2]-size[2]/2 ])
			rotate(180,[1,0,0])
			write(text,center=true,h=h,rotate=rotate,t=t,font=font);
		}
}

module write(word){

	echo (h);
	echo (word);
	echo ("There are " ,len(word) ," letters in this string");
//	echo ("The second letter is ",word[1]);
//	echo (str(word[0],"_"));
rotate(rotate,[0,0,-1]){
	for (r = [0:len(word)]){   // count off each character
		// if the letter is lower case, add an underscore to the end for file lookup
		if ((word[r] == "a" ) || (word[r]== "b")  || (word[r]== "c")
	 	  || (word[r]== "d") || (word[r]== "e") || (word[r]== "f")
	 	  || (word[r]== "g") || (word[r]== "h")  || (word[r]== "i")
       	  	  || (word[r]== "j") || (word[r]== "k") || (word[r]== "l")
       	 	  || (word[r]== "m") || (word[r]== "n") || (word[r]== "o")
       	 	  || (word[r]== "p") || (word[r]== "q") || (word[r]== "r")
	 	  || (word[r]== "s") || (word[r]== "t") || (word[r]== "u")
       	 	  || (word[r]== "v") || (word[r]== "w") || (word[r]== "x")
       	 	  || (word[r]== "y" )|| (word[r]== "z")){
			if (center == true)  {
				translate([0,-h/2,0]){
					scale([.125*h,.125*h,t]){
						translate([ (-len(word)*5.5*space/2) + (r*5.5*space),0,0])
						linear_extrude(height=1,convexity=10,center=true){
							import(file = font,layer=str(word[r],"_"));
						}
					}
				}
			}else{
				translate([0,0,t/2]){
					scale([.125*h,.125*h,t]){
						translate([r*5.5*space,0,0])
						linear_extrude(height=1,convexity=10,center=true){
							import(file = font,layer=str(word[r],"_"));
						}
					}
				}
			}

		}else{
			if (center == true)  {
				translate([0,-h/2,0]){
					scale([.125*h,.125*h,t]){
						translate([ (-len(word)*5.5*space/2) + (r*5.5*space),0,0])
						linear_extrude(height=1,convexity=10,center=true){
							import(file = font,layer=str(word[r]));
						}
					}
				}
			}else{
				translate([0,0,t/2]){
					scale([.125*h,.125*h,t]){
						translate([r*5.5*space,0,0])
						linear_extrude(height=1,convexity=10,center=true){
							import(file = font,layer=str(word[r]));
						}
					}
				}
			}
		}
	}
}
}

/*writecylinder test
translate([0,0,0])
%cylinder(r=20,h=40,center=true);
color([1,0,0])
writecylinder("rotate=90",[0,0,0],20,40,center=true,down=0,rotate=90);
writecylinder("rotate = 30,east = 90",[0,0,0],20,40,center=true,down=0,rotate=30,east=90);
writecylinder("ccw = true",[0,0,0],20,40,center=true,down=0,face="top",ccw=true);
writecylinder("middle = 8",[0,0,0],20,40,h=3,center=true,down=0,face="top",middle=8);
writecylinder("face = top",[0,0,0],20,40,center=true,down=0,face="top");
writecylinder("east=90",[0,0,0],20,40,h=3,center=true,down=0,face="top",east=90);
writecylinder("west=90",[0,0,0],20,40,h=3,center=true,down=0,face="top",ccw=true,west=90);
writecylinder("face = bottom",[0,0,0],20,40,center=true,down=0,face="bottom");
*/
/*writesphere test
sphere(20);
color([1,0,0])
writesphere("Hello World",[0,0,0],20,t=1,h=6);
*/
/* writecube test
translate([30,30,30])
cube([10,15,30],center=true);
write("hello",center=true,rotate =30);
color([1,0,0])
writecube( "front",[30,30,30],[10,15,30],h=5,rotate=-90);
color([0,1,0])
writecube( "back",[30,30,30],size=[10,15,30],h=5,face="back",rotate=90,t=4);
color([0,0,1])
writecube( "left",[30,30,30],[10,15,30],h=5,face="left",up=5);
color([1,1,0])
writecube( "right",where=[30,30,30],size=[10,15,30],h=5,face="right",rotate=55);
color([1,0,1])
writecube( "top",where=[30,30,30],size=[10,15,30],h=5,face="top");
color([1,1,1])
writecube( "bttm",where=[30,30,30],size=[10,15,30],h=5,face="bottom",rotate=90);
*/

```