mirror of
https://github.com/DJSundog/NopSCADlib.git
synced 2024-11-23 23:33:50 -05:00
76 lines
4.1 KiB
OpenSCAD
76 lines
4.1 KiB
OpenSCAD
//
|
|
// 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/>.
|
|
//
|
|
|
|
//
|
|
//! Global constants, functions and modules. This file is used directly or indirectly in every scad file.
|
|
//
|
|
include <../../global_defs.scad>
|
|
|
|
function inch(x) = x * 25.4; //! Inch to mm conversion (For fractional inches, 'inch(1 + 7/8)' will work as expected.)
|
|
function foot(x) = x * 25.4 * 12; //! Foot to mm conversion
|
|
function yard(x) = x * 25.4 * 12 * 3; //! Yard to mm conversion
|
|
function mm(x) = x; //! Explicit mm specified
|
|
function cm(x) = x * 10.0; //! cm to mm conversion
|
|
function m(x) = x * 1000.0; //! m to mm conversion
|
|
|
|
function sqr(x) = x * x; //! Returns the square of ```x```
|
|
function echoit(x) = echo(x) x; //! Echo expression and return it, useful for debugging
|
|
function in(list, x) = !!len([for(v = list) if(v == x) true]); //! Returns true if ```x``` is an element in the ```list```
|
|
function Len(x) = is_list(x) ? len(x) : 0; //! Returns the length of a list or 0 if ```x``` is not a list
|
|
function r2sides(r) = $fn ? $fn : ceil(max(min(360/ $fa, r * 2 * PI / $fs), 5)); //! Replicates the OpenSCAD logic to calculate the number of sides from the radius
|
|
function r2sides4n(r) = floor((r2sides(r) + 3) / 4) * 4; //! Round up the number of sides to a multiple of 4 to ensure points land on all axes
|
|
|
|
module translate_z(z) translate([0, 0, z]) children(); //! Shortcut for Z only translations
|
|
module vflip() rotate([180, 0, 0]) children(); //! Invert children by doing a 180° flip around the X axis
|
|
module hflip() rotate([0, 180, 0]) children(); //! Invert children by doing a 180° flip around the Y axis
|
|
module ellipse(xr, yr) scale([1, yr / xr]) circle4n(xr); //! Draw an ellipse
|
|
|
|
module extrude_if(h, center = true) //! Extrudes 2D object to 3D when ```h``` is nonzero, otherwise leaves it 2D
|
|
if(h)
|
|
linear_extrude(height = h, center = center, convexity = 2) // 3D
|
|
children();
|
|
else
|
|
children(); // 2D
|
|
|
|
module circle4n(r, d = undef) { //! Circle with multiple of 4 vertices
|
|
R = is_undef(d) ? r : d / 2;
|
|
circle(R, $fn = r2sides4n(R));
|
|
}
|
|
|
|
module semi_circle(r, d = undef) //! A semi circle in the positive Y domain
|
|
intersection() {
|
|
R = is_undef(d) ? r : d / 2;
|
|
circle4n(R);
|
|
|
|
sq = R + 1;
|
|
translate([-sq, 0])
|
|
square([2 * sq, sq]);
|
|
}
|
|
|
|
module right_triangle(width, height, h, center = true) //! A right angled triangle with the 90° corner at the origin. 3D when ```h``` is nonzero, otherwise 2D
|
|
extrude_if(h, center = center)
|
|
polygon(points = [[0,0], [width, 0], [0, height]]);
|
|
|
|
include <sphere.scad>
|
|
include <bom.scad>
|
|
include <polyholes.scad>
|
|
include <teardrops.scad>
|
|
include <rounded_rectangle.scad>
|
|
include <clip.scad>
|