LEGO.scad

An OpenSCAD LEGO-compatible brick generator.

This parametric brick takes the popular work of http://www.thingiverse.com/thing:5699 a couple steps further, adding easy Customizer support and support for generating wings, smooth-topped tiles, DUPLO-style bricks, sloped bricks, Technic-style holes, and more.

Depending on the resolution of your printer, you may not be able to print pieces that fit exactly with standard LEGO blocks. If you do print any of these bricks, I'd be interested to know whether they fits together with other bricks, especially if you have an SLS or SLA printer.

These blocks are not strictly identical to LEGO bricks, but they should be compatible in most every way.

See http://www.chrisfinke.com/2015/01/27/3d-printed-lego-compatible-bricks/ for more details.

Usage

The library exposes 2 high-level modules: the block module imported from LEGO.scad and the angle_plate module imported from LEGO-Angle-Plate.scad.

block()

The block module is most basic module, able to generate most basic parts.

Parameters

Parameter	Values	Description
width	int	Width of the block in studs
length	int	Length of the block in studs. The longest dimension between length and width is automatically re-mapped to length
height	$\left[\frac{1}{3}-\infty\right]$	Height of the block. A ratio of "1" is a standard LEGO brick height; a ratio of 1/3 is a standard LEGO plate height; 1/2 is a standard DUPLO plate.
type	brick, tile, wing, slope, curve, baseplate, round	What type of block should this be
brand	lego, duplo	What brand of block should this be
stud_type	solid, hollow	What stud type do you want? Hollow studs allow rods to be pushed into the stud.
block_bottom_type	open, closed	Open blocks are the standard, closed bottom blocks can be used for stacking composite shapes.
include_wall_splines	yes, no	Should the block wall include splines? Valid only for an open block bottom type.
horizontal_holes	yes, no	Should the block include round horizontal holes like the Technics LEGO bricks have?
vertical_axle_holes	yes, no	Should the block include vertical cross-shaped axle holes?
wing_type	full, left, right	What type of wing? Full is suitable for the front of a plane, left/right are for the left/right of a plane.
wing_end_width	int	The number of studs across the end of the wing. If width is odd, this needs to be odd, and the same for even.
wing_base_length	int	The length of the rectangular portion of the wing, in studs.
wing_stud_notches	yes, no	Should the wing edges be notched to accept studs below?
slope_stud_rows	int	How many rows of studs should be left before the slope?
slope_end_height	int	How much vertical height should be left at the end of the slope?
curve_stud_rows	int	How many rows of studs should be left before the curve?
curve_type	concave, convex	Should the curve be convex or concave?
curve_end_height	int	How much vertical height should be left at the end of the curve?
roadway_width	int	If you want a roadway, how wide should it be (in studs)?
roadway_length	int	How long should the roadway be?
roadway_x	int	Where should the roadway start (x-value)?
roadway_y	int	Where should the roadway start (y-value)?
roadway_invert	true, false	Should the road be inverted? Useful for minifigure display with one row of studs on the middle.
round_radius	int	How many studs should be rounded at the corners?
round_stud_notches	yes, no	Should the rounded edges be notched to accept studs below?
dual_sided	yes, no	SNOT means Studs Not On Top -- bricks with alternative stud configurations. Put studs on the top and bottom?
dual_bottom	yes, no	Instead of both sides having studs, both sides can have no studs.
use_reinforcement	yes, no	Should extra reinforcement be included to make printing on an FDM printer easier? Ignored for tiles, since they're printed upside-down and don't need the reinforcement. Recommended for block heights less than 1 or for Duplo bricks.
stud_rescale	float	If your printer prints the blocks correctly except for the stud diameter, use this variable to resize just the studs for your printer. A value of 1.05 will print the studs 105% wider than standard.
stud_top_roundness	float	If you want stud tops to be curved, specify a value between 0 and 1, where 0 is no roundness and 1 is very round

Examples

1x2 Plate use <LEGO.scad>; block( type="brick", width=1, length=2, height=1/3 );
1x1 Sloped Tile use <LEGO.scad>; block( width=1, length=1, height=2/3, type="slope" );
1x2 Rounded Plate use <LEGO.scad>; // Increase resolution of curves: $fn=32; block( type="round", width=1, length=2, height=1/3, stud_type="hollow", round_radius = .5 );