117 lines
3.8 KiB
OpenSCAD
117 lines
3.8 KiB
OpenSCAD
PBass_Scale_mm = 865; // Actually 34inch = 863.6mm
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Fender_Scale_mm = 648; // Actually 25.5inch = 647.7mm
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Classical_Normal_Scale_mm = 650; // about 25.59inch
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Classical_Short_Scale_mm = 635; // = 25inch
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Gibson_Scale_mm = 630; // 24.75inch = 628.65mm
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$guitar_scale_length_mm = Fender_Scale_mm;
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ln2 = ln(2);
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function log2(x) = ln(x)/ln2;
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function fret_scale_length(n) = $guitar_scale_length_mm * 2^(-n/12);
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function mm_to_fret_number(mm) = -log2(mm/$guitar_scale_length_mm)*12;
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function lerp(start, end, amount) = start + (end-start)*amount;
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function clamp(minimum, value, maximum) = min(max(minimum, value), maximum);
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function flatten(l) = [ for (a = l) for (b = a) b];
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function tri_circumcenter(pts) =
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let(
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v0 = pts[1] - pts[0],
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v1 = pts[2] - pts[1],
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d0 = (pts[1] + pts[0])/2 * v0,
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d1 = (pts[2] + pts[1])/2 * v1,
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det = -cross(v0, v1)
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)
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[cross([d1, d0], [v1.y, v0.y]), cross([d0, d1], [v0.x, v1.x])] / det;
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// Create a circle containing all 3 points, then plot the arc between the first two points
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function arc_points(tri_points, fragments_per_mm=5) =
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let(
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cc = tri_circumcenter(tri_points),
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r = norm(tri_points[0] - cc),
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steps = ceil((norm(tri_points[2] - tri_points[0]) + norm(tri_points[2] - tri_points[1]))*fragments_per_mm),
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normalized0 = (tri_points[0] - cc)/r,
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normalized1 = (tri_points[1] - cc)/r,
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a_start = atan2(normalized0[1], normalized0[0]),
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a_end = atan2(normalized1[1], normalized1[0]),
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a_sweep = a_end - a_start,
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a_step = a_sweep/steps
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)
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[for (i = [0:steps]) r*[cos(a_start+i*a_step), sin(a_start+i*a_step)] + cc];
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// Modified version of above for when we just want the initial angle
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function arc_points_angle(tri_points, fragments_per_mm=5) =
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let(
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cc = tri_circumcenter(tri_points),
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r = norm(tri_points[0] - cc),
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steps = ceil((norm(tri_points[2] - tri_points[0]) + norm(tri_points[2] - tri_points[1]))*fragments_per_mm),
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normalized0 = (tri_points[0] - cc)/r,
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normalized1 = (tri_points[1] - cc)/r,
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a_start = atan2(normalized0[1], normalized0[0])
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)
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a_start;
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function list_has(list, value) = len(search(value, list)) > 0;
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module sequential_hull() {
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// given sequential_hull() {a b c d}, do hull {a b} hull {b c} hull {c d}, etc.
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for (i = [0:$children-2]) hull() {
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children(i);
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children(i+1);
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}
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}
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module round_cube(size, r) {
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translate([r, r, r]) minkowski() {
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cube(size-[r*2,r*2,r*2]);
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sphere(r=r, $fn=72);
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}
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}
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module rotate_around(angles, pt) {
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translate(pt)
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rotate(angles)
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translate(-pt)
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children();
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}
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module screw_hole_lobe(ID, OD, lobes=3) {
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difference() {
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circle(d=OD);
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for (a=[0:360/lobes:360])
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translate((OD/2)*[cos(a), sin(a)])
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circle(d=OD-ID);
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}
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}
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module circle_outer(d) {
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// Regular circle inscribes, this circumscribes
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$fn = (is_undef($fn) || $fn<3) ? 72 : $fn;
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fudge = 1/cos(180/$fn);
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circle(d=d*fudge);
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}
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module cylinder_outer(d, h, center=false, d2=undef) {
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// Regular circle inscribes, this circumscribes
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$fn = (is_undef($fn) || $fn<3) ? 72 : $fn;
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fudge = 1/cos(180/$fn);
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if (is_undef(d2)) {
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cylinder(d=d*fudge, h=h, center=center);
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} else {
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cylinder(d1=d*fudge, d2=d2*fudge, h=h, center=center);
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}
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}
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module cylinder_beak(d, h, beak=0.75) {
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// A cylinder with a beak to take seams. This helps improve tolerances as seams often expand a little bit and ruin the fit.
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// Since we only use it for holes, it will be a cylinder_outer as well
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cylinder_outer(d=d, h=h);
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// beak notch for seams
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translate([0, d/2-beak*0.25, h/2]) rotate([0,0,45]) cube([beak, beak, h], center=true);
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}
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// We can't use Droid Sans Japanese because the rendering library is really dumb and will pick the wrong Droid Sans. CJK fonts must be singular files.
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JP_Serif_Font = "New Tegomin";
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JP_Sans_Font = "Yuji Boku";
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JP_Fat_Sans_Font = ["Potta One", "Yusei Magic"];
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JP_Light_Sans_Fonts = ["Hachi Maru Pop", "MotoyaLMaru", "Rounded MPlus 1c"];
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