GuitarModels/2Banger_headpiece.scad

include <common.scad>
include <2BangerCommon.scad>

// Nice big jumbo fret for the 0th fret
fret_width = 2.4*1.5; //2.4; //2.8;  // Jumbo = 0.11", 0.055" tall

module headpiece(from_fret, to_fret, tang_depth = 3, Cap_Length = 30) {
	z_min = (fret_scale_length(to_fret) + fret_scale_length(to_fret+1))/2;
	z_max = (fret_scale_length(from_fret) + fret_scale_length(from_fret-1))/2 + Cap_Length;
	z_offset = z_min;
	Tube_Length = z_max - z_min;
	echo(str("Cap length from fret ", from_fret, " to ", to_fret, " is ", Tube_Length, "mm"));

	module solid_tube(cap_taper = 1.5, fingerboard_min_thick = 2.5, fingerboard_max_thick = 5+2, fret_angle = 60) {  // Fret angle of 45° is normal, anything over 60 will not work correctly
		module fret_bumps(w=50) {
			translate([0,0,-z_offset]) for (fret = [from_fret:to_fret])
				translate([fingerboard_max_thick - fret_width/2, w/2, fret_scale_length(fret)])
					rotate([90,0,0]) cylinder(h = w, r = fret_width/2);
		}

		module scallops(w=50) {
			for (fret = [from_fret:to_fret+1])
				let(
					f_prev = fret_scale_length(fret-1) - z_offset,
					f_next = fret_scale_length(fret) - z_offset,
					o = fret_width/2 * sin(fret_angle),
					x0 = f_prev - o,
					x1 = f_next + o,
					y0 = fingerboard_min_thick,
					y1 = fingerboard_max_thick - (fret_width/2 * cos(fret_angle)),
					pts = [[x0, y1], [x1, y1], [(x0+x1)/2, y0]],
					cc = tri_circumcenter(pts),
					r = norm([x0, y1] - cc)
				) {
					translate([0,-w/2,0])
					rotate([-90,-90,0])
					translate(cc) cylinder(h = w, r = r);
				}
		}

		module basic_fretboard() {
			intersection() {
				hull() {
					minkowski($fn = mink_fn) {
						sphere(cap_taper, $fn = mink_fn);
						translate([0,0,cap_taper]) linear_extrude(0.01) offset(-cap_taper)
							cap_outline(fingerboard_min_thick = fingerboard_min_thick, fingerboard_max_thick = fingerboard_max_thick);
					}
					minkowski($fn = mink_fn) {
						sphere(cap_taper, $fn = mink_fn);
						translate([0,0,Tube_Length-cap_taper]) linear_extrude(0.01) offset(-cap_taper)
							cap_outline(fingerboard_min_thick = fingerboard_min_thick, fingerboard_max_thick = fingerboard_max_thick);
					}
					linear_extrude(Tube_Length) offset(-1) cap_outline();
					translate([0,0,cap_taper]) linear_extrude(Tube_Length-cap_taper*2)
						cap_outline(fingerboard_min_thick = fingerboard_min_thick, fingerboard_max_thick = fingerboard_max_thick);
				}
				union() {
					fret_bumps();
					translate([-50,-50,0]) cube([50 + fingerboard_max_thick - (fret_width/2 * cos(fret_angle)), 100, Tube_Length]);
				}
			}
		}

		// Make a solid tube and then subtract the notches
		difference() {
			union() {
				basic_fretboard();
				// translate([0,0,Tube_Length]) linear_extrude(tang_depth) tang_outline(-0.1);
			}
			difference() {
				scallops();
				fret_bumps();
			}
			// Shear off the top at an angle
			translate([-1,-50,Tube_Length])
			rotate([0,83.8])
				cube([45,100,100]);
			// Tang for connecting to next tube
			tapered_tang_groove(depth = tang_depth + 0.5, taper = 0);
			tapered_tang_groove(depth = 0.5, taper = 0, offset = 0.5);
		}
		// color("red") scallops();
	}

	module string_hole() {
		translate([0, 0, Tube_Length - Cap_Length - 5])
		rotate([0,-40])
		union() {
			translate([0, 0, 105])
				cube([7.5, 5, 200], center = true);
			cylinder(h = 200, r = 2.5, center = true);
		}
	}

	difference() {
		solid_tube(1.5);
		linear_extrude(Tube_Length - Cap_Length + 10) T_hole();
		tapered_T_hole(z0 = 0, z1 = 3);
		// tapered_T_hole(z0 = Tube_Length-3, z1 = Tube_Length+0.0001, o0 = 0, o1 = 1);
		// String holes
		translate([0, -10, 0])
			string_hole();
		translate([0, 10, 0])
			string_hole();
		// Version number
		translate([-10,10,Tube_Length-0.5]) linear_extrude(1) text("05²", size=5, halign="center", valign="center", font="Noto Sans");
		// Fret number markers
		for (fret = [from_fret:to_fret])
			translate([-3,-16,fret_scale_length(fret)-z_offset]) rotate([90,25,16]) linear_extrude(100) text(str(fret), size=4, halign="center", valign="center", font="Noto Sans");
	}
}


headpiece(from_fret = -5, to_fret = -5);
//translate([50, 0]) headpiece(from_fret = 0, to_fret = 0);