openscad/NopSCADlib
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Refactored for readability.

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This commit is contained in:
Chris Palmer
2023-04-23 20:30:12 +01:00
parent f8af61568a
commit 61fc194995
1 changed files with 14 additions and 13 deletions
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27
vitamins/screw.scad
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@@ -88,49 +88,50 @@ module screw(type, length, hob_point = 0, nylon = false) { //! Draw specified sc
vitamin(str("screw(", type[0], "_screw, ", length, arg(hob_point, 0, "hob_point"), arg(nylon, false, "nylon"), "): ", description)); vitamin(str("screw(", type[0], "_screw, ", length, arg(hob_point, 0, "hob_point"), arg(nylon, false, "nylon"), "): ", description));
head_type = screw_head_type(type); head_type = screw_head_type(type);
rad = screw_radius(type) - eps; shaft_rad = screw_radius(type) - eps;
head_rad = screw_head_radius(type); head_rad = screw_head_radius(type);
head_height = screw_head_height(type); head_height = screw_head_height(type);
socket_af = screw_socket_af(type); socket_af = screw_socket_af(type);
socket_depth= screw_socket_depth(type); socket_depth= screw_socket_depth(type);
socket_rad = socket_af / cos(30) / 2; socket_rad = socket_af / cos(30) / 2;
max_thread = screw_max_thread(type); max_thread = screw_max_thread(type);
thread_rad = is_undef(screw_thread_diameter(type)) ? rad : screw_thread_diameter(type) / 2 - eps; has_shoulder = !is_undef(screw_thread_diameter(type));
thread_rad = has_shoulder ? screw_thread_diameter(type) / 2 : screw_radius(type);
thread = max_thread ? length >= max_thread + 5 ? max_thread thread = max_thread ? length >= max_thread + 5 ? max_thread
: length : length
: length; : length;
thread_offset = is_undef(screw_thread_diameter(type)) ? 0 : thread; thread_offset = has_shoulder ? thread : 0;
d = 2 * (thread_rad + eps); thread_d = 2 * thread_rad;
pitch = metric_coarse_pitch(d); pitch = metric_coarse_pitch(thread_d);
colour = nylon || head_type == hs_grub ? grey(40) : grey(80); colour = nylon || head_type == hs_grub ? grey(40) : grey(80);
module shaft(socket = 0, headless = false) { module shaft(socket = 0, headless = false) {
point = screw_nut(type) ? 0 : 3 * rad; point = screw_nut(type) ? 0 : 3 * shaft_rad;
shank = length - socket - (is_undef(screw_thread_diameter(type)) ? thread : 0); shank = length - socket - (has_shoulder ? 0 : thread);
if(show_threads && !point && pitch) if(show_threads && !point && pitch)
translate_z(-length - thread_offset) translate_z(-length - thread_offset)
male_metric_thread(d, pitch, thread - (shank > 0 || headless ? 0 : socket), false, top = headless ? -1 : 0, solid = !headless, colour = colour); male_metric_thread(thread_d, pitch, thread - (shank > 0 || headless ? 0 : socket), false, top = headless ? -1 : 0, solid = !headless, colour = colour);
else else
color(colour * 0.9) color(colour * 0.9)
rotate_extrude() { rotate_extrude() {
translate([0, -length + point - thread_offset]) translate([0, -length + point - thread_offset])
square([thread_rad, length - socket - point]); square([thread_rad - eps, length - socket - point]);
if(point) if(point)
polygon([ polygon([
[0.4, -length], [0, point - length], [rad, point - length] [0.4, -length], [0, point - length], [shaft_rad, point - length]
]); ]);
} }
if(shank > 0) if(shank > 0)
color(colour) color(colour)
translate_z(-shank - socket) translate_z(-shank - socket)
cylinder(r = rad + eps, h = shank); cylinder(r = shaft_rad + eps, h = shank);
} }
module cs_head(socket_rad, socket_depth) { module cs_head(socket_rad, socket_depth) {
head_t = rad / 5; head_t = shaft_rad / 5;
head_height = head_rad + head_t; head_height = head_rad + head_t;
color(colour) { color(colour) {
@@ -176,7 +177,7 @@ module screw(type, length, hob_point = 0, nylon = false) { //! Draw specified sc
} }
if(head_type == hs_grub) { if(head_type == hs_grub) {
color(colour) { color(colour) {
r = show_threads ? rad - pitch / 2 : rad; r = show_threads ? shaft_rad - pitch / 2 : shaft_rad;
translate_z(-socket_depth) translate_z(-socket_depth)
linear_extrude(socket_depth) linear_extrude(socket_depth)
difference() { difference() {