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+
Axis-Positive: Towards the negative end of the axis the object is oriented on. IE: X-, Y-, or Z-.
Axis-Negative: Towards the negative end of the axis the object is oriented on. IE: X-, Y-, or Z-.
Fillet: A rounding of an interior or exterior edge.
Chamfer: A bevelling of an interior or exterior edge.
Orientation: The axis a part should be oriented to.
Alignment: The side of the origin that the part should be on. Given as a vector.

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])`
`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])`
`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]])`

`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);}`
`prismoid([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);}`

`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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