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added gridbeam library

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Timothy Schmidt 2011-01-05 12:23:09 +08:00 committed by Elmo
parent 851067e429
commit 4c90200e60
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/*
* OpenSCAD GridBeam Library (www.openscad.org)
* Copyright (C) 2009 Timothy Schmidt
*
* License: LGPL 2.1 or later
*/
// zBeam(segments) - create a vertical gridbeam strut 'segments' long
// xBeam(segments) - create a horizontal gridbeam strut along the X axis
// yBeam(segments) - create a horizontal gridbeam strut along the Y axis
// shelf(width, height) - create a shelf suitable for use in gridbeam structures width and height in 'segments'
// translateBeam([x, y, z]) - translate gridbeam struts or shelves in X, Y, or Z axes in units 'segments'
include <units.scad>
$beam_width = inch * 1.5;
$beam_hole_radius = inch * 5/16;
$beam_is_hollow = 1;
$beam_wall_thickness = inch * 1/8;
$beam_shelf_thickness = inch * 1/4;
module zBeam(segments) {
difference() {
cube([$beam_width, $beam_width, $beam_width * segments]);
for(i = [0 : segments - 1]) {
translate([$beam_width / 2, $beam_width + 1, $beam_width * i + $beam_width / 2])
rotate([90,0,0])
cylinder(r=$beam_hole_radius, h=$beam_width + 2);
translate([-1, $beam_width / 2, $beam_width * i + $beam_width / 2])
rotate([0,90,0])
cylinder(r=$beam_hole_radius, h=$beam_width + 2);
}
if ($beam_is_hollow == 1) {
translate([$beam_wall_thickness, $beam_wall_thickness, -1])
cube([$beam_width - $beam_wall_thickness * 2, $beam_width - $beam_wall_thickness * 2, $beam_width * segments + 2]);
}
}
}
module xBeam(segments) {
translateBeam([0,0,1])
rotate([0,90,0])
zBeam(segments);
}
module yBeam(segments) {
translateBeam([0,0,1])
rotate([-90,0,0])
zBeam(segments);
}
module translateBeam(v) {
for (i = [0 : $children - 1]) {
translate(v * $beam_width) child(i);
}
}
module shelf(width, depth) {
difference() {
cube([width * $beam_width, depth * $beam_width, $beam_shelf_thickness]);
translate([-1, -1, -1])
cube([$beam_width + 2, $beam_width + 2, $beam_shelf_thickness + 2]);
translate([-1, (depth - 1) * $beam_width, -1])
cube([$beam_width + 2, $beam_width + 2, $beam_shelf_thickness + 2]);
translate([(width - 1) * $beam_width, -1, -1])
cube([$beam_width + 2, $beam_width + 2, $beam_shelf_thickness + 2]);
translate([(width - 1) * $beam_width, (depth - 1) * $beam_width, -1])
cube([$beam_width + 2, $beam_width + 2, $beam_shelf_thickness + 2]);
}
}