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global_defs.scad
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global_defs.scad
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//
// NopSCADlib Copyright Chris Palmer 2018
// nop.head@gmail.com
// hydraraptor.blogspot.com
//
// This file is part of NopSCADlib.
//
// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
// GNU General Public License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with NopSCADlib.
// If not, see <https://www.gnu.org/licenses/>.
//
//
// This file included directly or indirectly in every scad file.
//
// This scheme allows the following:
// bom defaults to 0
// Setting $bom on the command line or in the main file before including lib.scad overrides it everywhere.
// Setting $bom after including lib overrides bom in the libs but not in the local file.
//
rr_green = [0, 146/255, 0]; // RepRap logo colour
crimson = [220/255, 20/255, 60/255];
layer_height = is_undef($layer_height) ? 0.25 : $layer_height; // layer height when printing
extrusion_width = is_undef($extrusion_width) ? 0.5 : $extrusion_width; // filament width when printing
nozzle = is_undef($nozzle) ? 0.45 : $nozzle; // 3D printer nozzle
cnc_bit_r = is_undef($cnc_bit_r) ? 1.2 : $cnc_bit_r; // minimum tool radius when milling 2D objects
pp1_colour = is_undef($pp1_colour) ? rr_green : $pp1_colour; // printed part colour 1, RepRap logo colour
pp2_colour = is_undef($pp2_colour) ? crimson : $pp2_colour; // printed part colour 2
pp3_colour = is_undef($pp3_colour) ? "SteelBlue" : $pp3_colour; // printed part colour 3
pp4_colour = is_undef($pp4_colour) ? "darkorange" : $pp4_colour;// printed part colour 4
show_rays = is_undef($show_rays) ? false : $show_rays; // show camera sight lines and light direction
show_threads = is_undef($show_threads) ? false : $show_threads; // show screw threads
// Minimum wall is about two filaments wide but we extrude it closer to get better bonding
squeezed_wall = $preview ? 2 * extrusion_width - layer_height * (1 - PI / 4)
: extrusion_width - layer_height / 2 + nozzle / 2 + extrusion_width / 2;
inf = 1e10; // very big
eps = 1/128; // small fudge factor to stop CSG barfing on coincident faces.
$fa = 6;
$fs = extrusion_width / 2;
function round_to_layer(z) = ceil(z / layer_height) * layer_height;
// Some additional named colours
function grey(n) = [0.01, 0.01, 0.01] * n; //! Generate a shade of grey to pass to color().
silver = [0.75, 0.75, 0.75];
gold = [255, 215, 0] / 255;
brass = [255, 220, 100] / 255;
copper = [230, 140, 51] / 255;
/*
* Enums
*/
//
// Screws
//
hs_cap = 0;
hs_pan = 1;
hs_cs = 2; // counter sunk
hs_hex = 3;
hs_grub = 4; // pulley set screw
hs_cs_cap = 5;
hs_dome = 6;
//
// Hot end descriptions
//
jhead = 1;
e3d = 2;
//
// Face enumeration
//
f_bottom = 0;
f_top = 1;
f_left = 2;
f_right = 3;
f_front = 4;
f_back = 5;