BOSL

The Belfry OpenScad Library - A library of tools, shapes, and helpers to make OpenScad easier to use.

This library is a set of useful tools, shapes and manipulators that I developed while working on various projects, including large ones like the Snappy-Reprap printed 3D printer.

Terminology

For purposes of the BOSL library, the following terms apply:

Left: Towards X-
Right: Towards X+
Front/Forward: Towards Y-
Back/Behind: Towards Y+
Bottom/Down/Below: Towards Z-
Top/Up/Above: Towards Z+

Examples

A lot of the features of this library are to allow shorter, easier-to-read, intent-based coding. For example:

`BOSL/transforms.scad` Examples	Raw OpenSCAD Equivalent
`up(5) ...`	`translate([0,0,5]) ...`
`yrot(45) ...`	`rotate([0,45,0]) ...`
`xrot(30, cp=[0, 10, 20]) ...`	`translate([0,10,20]) rotate([30,0,0]) translate([0,-10,-20]) ...`
`xspread(20, n=3) ...`	`for (dx=[-20,0,20]) translate([dx,0,0]) ...`
`zring(n=6, r=20) ...`	`for (zr=[0:5]) rotate([0,0,zr*60]) translate([20,0,0]) ...`
`zflip_copy() shape();`	`shape(); mirror([0,0,1]) shape();`
`skew_xy(xa=30,ya=45) ...`	`multmatrix([[1, 0, tan(30), 0], [0, 1, tan(45), 0], [0, 0, 1, 0], [0, 0, 0, 1]]) ...`
`top_half(100) shape();`	`difference() {shape(); translate([0,0,-50]) cube(100, center=true);}`

`BOSL/shapes.scad` Examples	Raw OpenSCAD Equivalent
`upcube([10,20,30]);`	`translate([0,0,15]) cube([10,20,30], center=true);`
`rcube([20,20,30], r=5, $fn=32);`	`minkowski() {cube([10,10,20], center=true); sphere(r=5, $fn=32);}`
`chamfcube([20,20,30], chamfer=5);`	`hull() {cube([10,10,30], center=true); cube([10,20,20], center=true); cube([20,10,20], center=true); cube([15,15,25], center=true);}`
`trapezoid([30,40], [20,30], h=10);`	`hull() {translate([0,0,0.005]) cube([30,40,0.01], center=true); translate([0,0,9.995]) cube([20,30,0.01], center=true);}`
`xcyl(l=20, d=4);`	`rotate([0,90,0]) cylinder(h=20, d=4, center=true);`
`rcylinder(h=100, d=40, fillet=5);`	`translate([0,0,50]) minkowski() {cylinder(h=90, d=30, center=true); sphere(r=5);}`
`torus(r=30, r2=5);`	`rotate_extrude(convexity=4) translate([30,0,0]) circle(r=5);`

`BOSL/masks.scad` Examples	Raw Openscad Equivalent
`chamfer_mask_z(l=20, chamfer=5);`	`rotate(45) cube([5sqrt(2), 5sqrt(2), 20], center=true);`
`fillet_mask_z(l=20, fillet=5);`	`difference() {cube([10,10,20], center=true); for(dx=[-5,5],dy=[-5,5]) translate([dx,dy,0]) cylinder(h=20.1, r=5, center=true);}`
`fillet_hole_mask(r=30, fillet=5);`	`difference() {cube([70,70,10], center=true); translate([0,0,-5]) rotate_extrude(convexity=4) translate([30,0,0]) circle(r=5);}`

The Library Files

The library files are as follows:

Commonly Used

transforms.scad: The most commonly used transformations, manipulations, and shortcuts are in this file.
shapes.scad: Common useful shapes and structured objects.
masks.scad: Shapes that are useful for masking with difference() and intersect().
threading.scad: Modules to make triangular and trapezoidal threaded rods and nuts.
paths.scad: Functions and modules to work with arbitrary 3D paths.
beziers.scad: Functions and modules to work with bezier curves.

Standard Parts

involute_gears.scad: Modules and functions to make involute gears and racks.
joiners.scad: Modules to make joiner shapes for connecting separately printed objects.
sliders.scad: Modules for creating simple sliders and rails.
metric_screws.scad: Functions and modules to make metric screws, nuts, and screwholes.
linear_bearings.scad: Modules to make mounts for LMxUU style linear bearings.
nema_steppers.scad: Modules to make mounting holes for NEMA motors.
phillips_drive.scad: Modules to create Phillips screwdriver tips.
torx_drive.scad: Functions and Modules to create Torx bit drive holes.
wiring.scad: Modules to render routed bundles of wires.

Miscellaneous

math.scad: Useful helper functions.
constants.scad: Useful constants for vectors, edges, etc.
quaternions.scad: Functions to work with quaternion rotations.
debug.scad: Modules to help debug creation of beziers, polygons()s and polyhedron()s

Documentation

The full library docs can be found at https://github.com/revarbat/BOSL/wiki

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