89 lines
3.4 KiB
OpenSCAD
89 lines
3.4 KiB
OpenSCAD
//
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// NopSCADlib Copyright Chris Palmer 2018
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// nop.head@gmail.com
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// hydraraptor.blogspot.com
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//
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// This file is part of NopSCADlib.
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//
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// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
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// GNU General Public License as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along with NopSCADlib.
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// If not, see <https://www.gnu.org/licenses/>.
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//
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//
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//! Sheet materials. Rectangular with optional rounded corners. Negative radii make a chamfer.
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//!
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//! The "Soft" parameter can be used to determinesif the sheet material needs machine screws or wood screws, e.g.:
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//!
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//! * If soft, wood screws will be used, with a pilot hole.
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//! * If not soft, either tapped holes or a clearance hole and nuts will be used to retain screws.
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//!
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//! The "Color" parameter is a quad-array: [R, G, B, Alpha], or can be a named color, see [OpenSCAD_User_Manual](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/The_OpenSCAD_Language#color).
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//!
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//! For speed sheets should be modelled in 2D by subtracting holes from 2D templates made by ```sheet_2D()``` and then extruded to 3D with ```render_2D_sheet()```.
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//! Note that modules that drill holes will return a 2D object if ```h``` is set to 0 to facilitate this.
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//
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include <../core.scad>
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function sheet_thickness(type) = type[2]; //! Thickness
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function sheet_colour(type) = type[3]; //! Colour
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function sheet_is_soft(type) = type[4]; //! Is soft enough for wood screws
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module corner(r) {
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if(r > 0)
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translate([r, -r])
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circle4n(r);
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else
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if(r < 0)
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translate([-r, r])
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rotate(45)
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square(-r * sqrt(2), -r * sqrt(2), center = true);
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else
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translate([0.5, -0.5])
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square(1, center = true);
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}
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module sheet_2D(type, w, d, corners = [0, 0, 0, 0]) { //! 2D sheet template with specified size and optionally rounded corners
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t = sheet_thickness(type);
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vitamin(str("sheet(", type[0], ", ", w, ", ", d, arg(corners, [0, 0, 0, 0]), "): ", type[1], " ", round(w), "mm x ", round(d), "mm x ", t, "mm"));
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c = is_list(corners) ? corners : corners * [1, 1, 1, 1];
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hull() {
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translate([-w/2, d/2])
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corner(c[0]);
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translate([ w/2, d/2])
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rotate(-90)
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corner(c[1]);
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translate([ w/2, -d/2])
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rotate(-180)
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corner(c[2]);
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translate([-w/2, -d/2])
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rotate(-270)
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corner(c[3]);
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}
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}
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module sheet(type, w, d, corners = [0, 0, 0, 0]) //! Draw speified sheet
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linear_extrude(height = sheet_thickness(type), center = true)
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sheet_2D(type, w, d, corners);
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module render_sheet(type, color = false) //! Render a sheet in the correct colour after holes have been subtracted
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color(color ? color : sheet_colour(type))
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render() children();
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module render_2D_sheet(type, color = false) //! Extrude a 2D sheet template and give it the correct colour
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color(color ? color : sheet_colour(type))
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linear_extrude(height = sheet_thickness(type), center = true)
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children();
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