LDraw Primitives Reference
This page is a source of reference for the LDraw primitives in the
\LDraw\p directory. Primitives are defined as highly re-usable
components of LEGO parts modelled for LDraw.
- To speed up parts authoring by providing a library of components which can be incorporated into several parts
- To allow rendering software to make substitutions of curved components
- Rectilinear primitives
- Curved primitives
- Technic primitives
- Stud-related primitives
- Miscellaneous primitives
Each section contains an overview of the characteristics common to all primitives within that category. Primitives are grouped into classes within each category - one class of primitive serving a similar purpose at different sizes or resolutions. For each class of primitive, a brief description of the purpose of the primitive is provided, with notes on its co-ordinate origin, default size and rules for scaling. A list of the available primitives is shown.
An understanding of the orientation of the co-ordinate axes is essential for authoring a part for LDraw. For reference within this page the axes and their direction is shown in this diagram. |
![]() |
Rectilinear primitives
These rectilinear elements may be scaled in the {x}, {y} and {z} dimensions to make elements of any size. For example
1 16 0 0 0 40 0 0 0 1 0 0 0 20 rect.dat
would generate a 80LDu x 40LDu rectangle in the {x,z} plane.
Although the default orientation of the rect.dat primitive is in the {x,z} plane the LDraw language allows for this to be transformed
1 16 0 0 0 0 1 0 40 0 0 0 0 20 rect.dat
would generate a 80LDu x 40LDu rectangle in the {y,z} plane.
1 16 0 0 0 40 0 0 0 0 20 0 1 0 rect.dat
would generate a 80LDu x 40LDu rectangle in the {x,y} plane.
Two dimensional |
Top |
|
Rectangle with all edges |
![]() |
This primitive represents a rectangle in the {x,z} plane and the four edges that bound it.
Its origin is at its centre and by default has a size of 2LDu in each of the {x} and {z} dimensions. To avoid matrix
arithmetic problems in some renderers, the third dimension ({y} in the default orientation) must be given a non-zero scaling
factor. |
|
Rectangle with 3 edges |
![]() |
This primitive represents a rectangle in the {x,z} plane but excludes one edge {-z}. Its origin is at its centre and by default has a size of 2LDu in each of the {x} and {z} dimensions. |
|
Rectangle with 2 parallel edges |
![]() |
This primitive represents a rectangle in the {x,z} plane but excludes two parallel edges ({+x} and {-x}). Its origin is at its centre and by default has a size of 2LDu in each of the {x} and {z} dimensions. |
|
Rectangle with 2 adjacent edges |
![]() |
This primitive represents a rectangle in the {x,z} plane but excludes two adjacent edges ({-x} and {-z}). Its origin is at its centre and by default has a size of 2LDu in each of the {x} and {z} dimensions. |
|
Rectangle with 1 edge |
![]() |
This primitive represents a rectangle in the {x,z} plane but include only the one {+x} edge. Its origin is at its centre and by default has a size of 2LDu in each of the {x} and {z} dimensions. |
|
Empty rectangle with three edges |
![]() |
This primitive represents three edges of a rectangle in the {x,z} plane. Its origin is at its centre and by default has a size of 2LDu in each of the {x} and {z} dimensions. |
|
Empty rectangle with all edges |
![]() |
This primitive represents the four edges of a rectangle in the {x,z} plane. Its origin is at its centre and by default has a size of 2LDu in each of the {x} and {z} dimensions. |
Three dimensional |
Rectilinear primitives Top |
|
Cuboid with all faces and edges |
![]() |
This primitive is used to define a cuboid. Its origin is the centre of the cuboid and by default has a size of 2LDu in each of the three dimensions. |
|
Cuboid with 5 faces and all edges |
![]() |
This primitive represents a cuboid missing the top {-y} face. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 5 faces without 1 edge |
![]() |
This primitive represents a cuboid missing the top {-y} face and one edge {-z} of that. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 5 faces without 2 parallel edges |
![]() |
This primitive represents a cuboid missing the top {-y} face and two of the four edges surrounding that. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 5 faces without top edges |
![]() |
This primitive represents a cuboid missing the top {-y} face and the four edges surrounding that. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 5 faces missing all edges |
![]() |
This primitive represents a cuboid missing the top {-y} face and all edges. Its primary use is for sticker parts. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 4 parallel faces and all edges |
![]() |
This primitive represents a cuboid missing the top {-y} and bottom {+y} faces. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 4 parallel faces without bottom edges |
![]() |
This primitive represents a cuboid missing the top {-y} and bottom {+y} faces, and missing the edges of the bottom face. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 4 parallel faces without top and bottom edges |
![]() |
This primitive represents a cuboid missing the top {-y} and bottom {+y} faces, and missing the edges of the top and bottom face. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 4 adjacent and all edges |
![]() |
This primitive represents a cuboid missing the top {-y} and front {-z} faces, but with all its edges. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 4 adjacent faces missing 1 edge |
![]() |
This primitive represents a cuboid missing the top {-y} and front {-z} faces and the edge between those faces. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 4 faces without two opposite top edges |
![]() |
This primitive represents a cuboid missing the top {-y} and bottom {+y} faces, and missing two edges of the top face - the intersection of the two missing faces and the opposite edge. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 4 faces without three parallel edges |
![]() |
This primitive represents a cuboid missing the top {-y} and bottom {+y} faces, and missing three edges of the missing faces. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 4 adjacent faces missing 4 edges |
![]() |
This primitive represents a cuboid missing the top {-y} and front {-z} faces and all the edges of the missing front face. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 4 adjacent faces missing 7 edges |
![]() |
This primitive represents a cuboid missing the top {-y} and front {-z} faces and all the edges of both missing faces. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 3 adjacent faces missing 3 edges |
![]() |
This primitive represents a cuboid missing the top {-y}, front {-z} and left {-x} faces and excludes the three edges which do not bound the included faces. Its origin is the centre of the cuboid and by default has a size of 2LDu in each of the {x}, {y} and {z} dimensions. |
|
Cuboid with 3 adjacent faces missing 5 adjacent edges |
![]() |
This primitive represents a cuboid missing the top {-y}, front {-z} and left {-x} faces and includes the three internal edges and the outer edges except those on the left {-z}. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x}, {y} and {z} dimensions. |
|
Cuboid with 3 adjacent faces missing 7 adjacent edges |
![]() |
This primitive represents a cuboid missing the top {-y}, front {-z} and left {-x} faces and includes the three internal edges but only the outer edges at the top (-y). Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x}, {y} and {z} dimensions. |
|
Cuboid with 3 adjacent faces missing 9 adjacent edges |
![]() |
This primitive represents a cuboid missing the top {-y}, front {-z} and left {-x} faces and includes only the three internal edges. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x}, {y} and {z} dimensions. |
|
Cuboid with 3 adjacent faces missing all edges |
![]() |
This primitive represents a cuboid missing the top {-y}, front {-z} and left {-x} faces but excludes all edges. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x}, {y} and {z} dimensions. |
|
Cuboid with 3 faces missing 2 edges |
![]() |
This primitive represents a cuboid missing the top {-y} and left {-x} and right {+x} faces and excludes the top edges of the left {-x} and right {+x} faces. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 3 faces missing 4 parallel edges |
![]() |
This primitive represents a cuboid missing the top {-y} and left {-x} and right {+x} faces and excludes the topand bottom edges of the left {-x} and right {+x} faces. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 3 faces missing 4 adjacent edges |
![]() |
This primitive represents a cuboid missing the top {-y} and left {-x} and right {+x} faces and excludes the edges of the missing top face. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 3 faces missing 5 edges |
![]() |
This primitive represents a cuboid missing the top {-y} and left {-x} and right {+x} faces and excludes the top edge of the left {-x} face and all edges of the right {+x} face. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 3 faces missing 6 edges |
![]() |
This primitive represents a cuboid missing the top {-y} and left {-x} and right {+x} faces and excludes the top and bottome edges of the right {+x} face and all edges of the left {-x} face. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 3 faces missing 7 adjacent edges |
![]() |
This primitive represents a cuboid missing the top {-y} and left {-x} and right {+x} faces and excludes the edges of the missing top (-y) and right (+x) faces. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 3 parallel faces missing all edges |
![]() |
This primitive represents a cuboid missing the top {-y} and left {-x} and right {+x} faces and excludes all the edges. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 3 faces missing 8 edges (in two parallel groups) |
![]() |
This primitive represents a cuboid missing the top {-y} and left {-x} and right {+x} faces and excludes all the edges of the left {-x} and right {+x} faces. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 3 faces in a 'U' shape, missing 10 edges (all except those between the faces) |
![]() |
This primitive represents a cuboid missing the top {-y} and left {-x} and right {+x} faces and excludes all the edges except the two betweenthe faces. Its origin is the centre of the (missing) top face and by default has a size of 2LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Cuboid with 2 adjacent faces missing 5 edges |
![]() |
This primitive represents a cuboid missing the top {-y}, front {-z}, left {-x} and right {+x} faces and excludes all the edges which do not bound the included faces. Its origin is the centre of the cuboid and by default has a size of 2LDu in each of the {x}, {y} and {z} dimensions. |
|
Cuboid with 2 adjacent faces missing 7 edges |
![]() |
This primitive represents a cuboid missing the top {-y}, front {-z}, left {-x} and right {+x} faces and excludes all the edges except that at the join between the two faces and those along the left {-x} and right {+x} sides. Its origin is the centre of the cuboid and by default has a size of 2LDu in each of the {x}, {y} and {z} dimensions. |
|
Cuboid with 2 adjacent faces missing 9 edges (all except those connected to the {+x}, {+y}, {+z} vertex) |
![]() |
This primitive represents a cuboid missing the top {-y}, front {-z}, left {-x} and right {+x} faces and excludes all the edges except that at the join between the two faces and those along the right {+x} sides. Its origin is the centre of the cuboid and by default has a size of 2LDu in each of the {x}, {y} and {z} dimensions. |
|
Cuboid with 2 adjacent faces missing 9 edges (all except three parallel edges) |
![]() |
This primitive represents a cuboid missing the top {-y}, front {-z}, left {-x} and right {+x} faces and excludes all the edges except that at the join between the two faces and those parallel to that. Its origin is the centre of the cuboid and by default has a size of 2LDu in each of the {x}, {y} and {z} dimensions. |
|
Cuboid with 2 adjacent faces missing 11 edges |
![]() |
This primitive represents a cuboid missing the top {-y}, front {-z}, left {-x} and right {+x} faces and excludes all the edges except that at the join between the two faces. Its origin is the centre of the cuboid and by default has a size of 2LDu in each of the {x}, {y} and {z} dimensions. |
|
Cuboid with no faces and edges |
![]() |
This primitive is used to define the frame a cuboid. Its origin is the centre of the cuboid and by default has a size of 2LDu in each of the three dimensions. |
|
Right-angled triangular prism with 3 faces |
![]() |
This primitive represents a triangular prism missing the top {-y} and bottom {+y} faces but including all edges. The left {-x} and front {-z} faces are perpendicular. Its origin is the right-angle corner of the (missing) top face and by default has a size of 1LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Right-angled triangular prism with 3 adjacent faces missing 1 edge |
![]() |
|
|
Right-angled triangular prism with 3 adjacent faces missing 4 adjacent edges |
![]() |
|
|
Right-angled triangular prism with 3 faces missing 1 edge |
![]() |
This primitive represents a triangular prism missing the left {-x} and front {-z} faces. Its origin is the right-angle corner of the top face and by default has a size of 1LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Right-angled triangular prism with 3 faces missing 3 edges |
![]() |
This primitive represents a triangular prism missing the left {-x} and front {-z} faces, the edge where they would join and one edge of each of the triangles. Its origin is the right-angle corner of the top face and by default has a size of 1LDu in each of the {x} and {z} dimensions and 1LDu in the {y} dimension. |
|
Box truncated by cylinder |
![]() |
This suite of primitives are used to model the intersection between a box and cylinders of different radii.
The box has a fixed width of 2LDu and the cylinder radius is denoted by the r in the filename. |
Curved primitives
LDraw represents curved surfaces as polygons. For circular components two series of primitives are provided.
All the circular primitives are orientated in the {x,z} plane with their origin at the centre of the circle and a default radius of 1 LDu. Primitives are provided for complete circles and for commonly used fractions of a complete circle. Where the naming convention includes a prefix of the form n-f this indicates the fraction (n/f) of the circle drawn by the primitive. Where this fraction is less than an entire circle, the primitive starts at {+x,0} and progresses in a conterclockwise direction when viewed from above {-y}.
To avoid rounding errors, it is preferable to use existing fractional circular primitives, or create a new primitive, rather than rotate an existing primitive by anything other than 90 or 180 degrees. For example, use 3-16XXXX.dat rather than combining 1-8XXXX.dat with 1-16XXXX.dat rotated by 22.5 degreees.
![]() |
![]() 1-8disc |
![]() 1-4disc |
![]() 2-4disc |
![]() 3-4disc |
![]() 4-4disc |
To avoid matrix arithmetic problems in some renderers, the third dimension ({y} in the default orientation) of two-dimensional primitives must be given a non-zero scaling factor.
LDraw circles are normally formed of 16-sided polygons (hexdecagons) - the regular resolution. For larger elements, where scaling-up of hexadecagons would give too angular an appearance, a series of high resolution primitives based on a 48-sided polygon are available. These may also be used for parts not well suited to a 16-fold symmetry.
These circular elements may be scaled by the same factor in both the {x} and {z} dimensions to make circular elements of greater or less than 1LDu radius. For example
1 16 0 0 0 3 0 0 0 1 0 0 0 3 4-4edge.dat
would generate a circle in the {x,z} plane with a radius of 3LDu.
They may also be scaled asymmetrically in the x and z dimension to make ellipses.
Although the default orientation is in the {x,z} plane the LDraw language allows for these to be transformed
1 16 0 0 0 0 1 0 3 0 0 0 0 3 4-4edge.dat
would generate a circle in the {y,z} plane
1 16 0 0 0 3 0 0 0 0 3 0 1 0 4-4edge.dat
would generate a circle in the {x,y} plane
Two dimensional |
Curved primitives Top |
|
Circular line segment |
![]() |
This suite of primitives are used for edges which comprise an entire or part circle. |
|
Circular disc sector |
![]() |
This suite of primitives are used for surfaces which comprise an entire or part circle. |
|
Inverse of circular disc sector |
![]() |
This suite of primitives pad their matching n-fdisc.dat primitives out to the bounding square.
They are used to integrate circular elements into rectilinear elements. |
|
Circular disc segment |
![]() |
This suite of primitives are used for surfaces which comprise part of a circle enclosed by the arc of its circumference
and its chord. Note that the bounding circle in the image is for context only - only the grey segment is generated by
the 1-4chrd primitive. |
|
Primitive Substitution Adapters |
![]() |
This suite of primitives are used correct for gaps that form between curved primitives and normal geometry in editors that utilize
primitive substitution. This is a special case used on the inside of a curved primitive where it
joins geometry that cannot make use of a curved primitive. The chrd files themselves are simply a reference to empty.dat,
which under normal circumstances does not draw anything. However, in tools that support primitive substitution, the
curved primitive it is attached to would normally in this case create a gap when rendered using more than 16 points to
form a circle. In that case, the substituted version of these normally empty primitives would fill in the gap between the
curve and the other geometry.
Note that the bounding circle in the image is for context only - there are no actual geometry producing lines contained in these files Currently available primitives : Regular resolution (n-f) : 1-16chrd, 1-4ering, 1-8ering, 3-16ering, 2-4ering, 4-4ering High resolution (n-f) : none |
|
Tangential ring segment |
![]() |
This suite of primitives are used to pad a 16-sided polygon to a circumscribing 16-sided polygon whose edges are tangential to the inner polygon.
Note that the bounding circle in the image is for context only - only the grey segment is generated by
the 1-4tang primitive. |
|
Circular ring segment |
![]() |
This suite of primitives are used to generate circular rings or part rings. The numeric suffix r in the
filename indicates the inner radius of the ring - the outer radius is 1LDu greater. For example a n-f4-4ring4 primitive
would create a ring with an inner radius of 4LDu and an outer radius of 5LDu. |
|
Circular adaptor ring segment |
This suite of primitives are used to interface between high resolution (48-segment) circular primitives and normal resolution (16-segment) circluar primitives.
| |
Three dimensional |
Curved primitives Top |
|
Circular cylinder | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
This suite of primitives are used to generate cylinders or part cylinders.
These are provided in two forms - with conditional lines (n-fcyli) or without conditional lines (n-fcyli2).
In almost all circumstances the "cyli" version should be used. The "cyli2" versions are for very special cases and their use for the rounded corners of stickers is no longer appropriate. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Circular cylinder with Open End | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
This suite of primitives are used to generate cylinders or part cylinders with edges around the lower and upper surfaces. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Circular cylinder with Closed End | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
This suite of primitives are used to generate cylinders or part cylinders with the upper surface closed. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Circular cylinder truncated by an angled plane | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() 1-4cyls.dat ![]() 3-8cyls.dat ![]() 2-4cyls.dat ![]() 1-4cyls2.dat |
These primitives are used to generate cylinders or part cylinders which
are truncated by a plane which is not perpendicular to the axis of the cylinder. The default angle of the plane is 45
degress.
Currently available primitives : Regular resolution : 1-8cyls, 3-16cyls, 1-4cyls, 3-8cyls, 2-4cyls, 4-4cyls, 1-8cyls2, 3-16cys2, 1-4cyls2 High resolution : 1-4cyls, 1-4cyls2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Circular cylinder truncated by an angled plane with angled edge included | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
This suite of primitives are similar to the n-fcyls primitive, but with the edge along the angled plane included. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Circular cylinder truncated by another cylinder | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
This suite of primitives are used to model the intersection between two cylinders of different radii. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Circular cylinder truncated by a sphere | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
This suite of primitives are used to model the intersection between a cylinder and a sphere of a different radius. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Circular cone | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
This suite of primitives are used to generate circular cones or part cones. The numeric
suffix r in the filename indicates the inner radius of the cone - the outer radius is 1LDu greater. By default the
cone is 1LDu high in the {+y} dimension with the origin at the centre of the outer diameter.
For example a n-fcone4 primitive would create a cone with an inner radius of 4LDu and an outer radius of 5LDu. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Circular torus | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() inner ![]() outer ![]() tube |
This suite of primitives are used to generate circular torus sections.
By default all these primitives produce a torus with a major radius of 1LDu, so typically need to be scaled up in the {x} and {z} dimensions.
The first character denotes whether the minor radius is smaller than (tff primitives) or larger than the major radius (rff primitives).
The latter are termed reverse ratio tori.
The second and third characters of the filename ff denotes the sweep of torus, as an inverse fraction
(01=1/1, 02=1/2, 04=1/4, 08=1/8, 16=1/16, 32=1/32, 48=1/48).
The fourth character denotes the section of a torus (i=inner, o=outer, q=tube - the combination of 2 inner and 2 outer
sections). Inner sections are not possible for reverse ratio tori.
Regular resolution :
High resolution:
Currently available reverse ratio torus primitives : Regular resolution :
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Circular torus (obsolete) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
This single primitive pre-dates the creation of the tffirrrr
and tfforrrr suite of primitives and will not be augmented. It produces a quarter torus with a major
radius of 2.5Ldu and a tube radius of 1LDu. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Sphere section | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Spherical corner | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
This primitive represents one octant (eighth) of a sphere,
centered at the origin {0,0,0} of radius 1.414, truncated by the sides of a cube with a
vertex at {1,1,1}. The boundaries of the resulting surface are circular and fit with 1-4edge.dat. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Technic primitives
Technic axle primitives |
Top |
These primitives represent various components of the technic axle and its matching hole. They are orientated in the {x,z} plane. Except where noted below, and in the {y} dimension only, these primitives must not be scaled.
|
Technic axle section |
![]() |
This primitive is comprises a 1LDu long section of technic axle, including its ends. It may be scaled in the {y} dimension to produce an axle of any length. |
|
Technic axle end |
![]() |
This primitive is used to produce the "plus-shaped" cross section of a technic axle. |
|
Technic axle hole - closed |
![]() |
This primitive produces a technic axle hole with the disc ends and all sides. It may be scaled in the {y} dimension as necessary. |
|
Technic axle hole - open one side |
![]() |
This primitive produces a technic axle hole with one side omitted. It may be scaled in the {y} dimension as necessary. |
|
Technic axle hole - open two opposite sides |
![]() |
This primitive produces a technic axle hole with two opposite sides omitted. It may be scaled in the {y} dimension as necessary. |
|
Technic axle hole tooth |
![]() |
This primitive represents one tooth of a technic axle hole. It may be scaled in the {y} dimension as necessary. |
|
Technic axle hole - tooth surface |
![]() |
This primitive used to produce the fill the "plus-shaped" cross section of a technic axle to the bounding circle. |
|
Technic axle hole - sides |
![]() |
This primitive is comprises a 1LDu long section of outer sides of a technic axle. It may be scaled in the {y} dimension. |
|
Technic axle hole perimeter |
![]() |
This primitive is comprises a 1LDu long section of technic axle, without any ends. It may be scaled in the {y} dimension as necessary. |
|
Technic axle hole - side edges |
![]() |
This primitive produces the edges at the ends of the "plus-shaped" technic axle. |
|
Technic axle hole - tooth outer edges |
![]() |
This primitive produces the outer edges of the teeth of a technic axle hole. |
|
Technic axle hole - tooth inner edges |
![]() |
This primitive produces the inner edges of the "plus-shaped" technic axle. |
Reduced axle hole
|
Technic axle hole reduced |
![]() |
This primitive produces a technic axle hole with reduced teeth including the disc ends and all edges. It may be scaled in the {y} dimension as necessary. |
|
Technic axle hole reduced - tooth surface |
![]() |
This primitive used to produce the fill the "plus-shaped" cross section of a reduced technic axle to the bounding circle. |
|
Technic axle hole reduced - perimeter |
![]() |
This primitive is comprises a 1LDu long section of reduced technic axle, without any ends. It may be scaled in the {y} dimension as necessary. |
|
Technic axle hole reduced - side edges |
![]() |
This primitive produces the edges at the ends of the "plus-shaped" reduced technic axle. |
|
Technic axle hole reduced - tooth outer edges |
![]() |
This primitive produces the outer edges of the teeth of a reduced technic axle hole. |
|
Technic axle hole reduced - tooth inner edges |
![]() |
This primitive produces the inner edges of the reduced "plus-shaped" technic axle. |
Semi-reduced axle hole
|
Technic axle hole - semi reduced |
![]() |
This primitive produces a technic axle hole with semi-reduced teeth including the disc ends and all edges. It may be scaled in the {y} dimension as necessary. |
|
Technic axle hole semi-reduced tooth |
![]() |
This primitive represents the teeth of a semi-reduced technic axle hole. It may be scaled in the {y} dimension as necessary. |
|
Technic axle hole semi-reduced - tooth surface |
![]() |
This primitive used to produce the fill the "plus-shaped" cross section of a semi-reduced technic axle to the bounding circle. |
|
Technic axle hole semi-reduced - perimeter |
![]() |
This primitive is comprises a 1LDu long section of semi-reduced technic axle, without any ends. It may be scaled in the {y} dimension as necessary. |
|
Technic axle hole semi-reduced - side edges |
![]() |
This primitive produces the edges at the ends of the "plus-shaped" semi-reduced technic axle. |
|
Technic axle hole semi-reduced - tooth outer edges |
![]() |
This primitive produces the outer edges of the teeth of a semi-reduced technic axle hole. |
|
Technic axle hole semi-reduced - tooth inner edges |
![]() |
This primitive produces the inner edges of the semi-reduced "plus-shaped" technic axle. |
Special axle primtives
|
Technic axle - truncated to fit ball joint | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
This primitive produces the tip of an axle, truncated to fit a 12.81 LDu radius sphere. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Technic castellated bush primitives | Technic primitives Top |
These primitives are various representations of the castellated technic bush. They are orientated with the technic axle hole along the {y} axis and must not be scaled.
|
Technic 16-tooth castellation - long teeth |
![]() |
|
|
Technic 16-tooth castellation - regular teeth |
![]() |
|
|
Technic 16-tooth castellation - regular teeth indented |
![]() |
This primitive differs from bushloc2.dat in that the teeth are indented in four places to allow it to fit between four adjacent studs. |
|
Technic 16-tooth castellation - short teeth |
![]() |
|
|
Curved end to technic 1xn plate with 16-tooth castellation on underside |
![]() |
Technic bush primtives | Technic primitives Top |
These primitives are usd to construct technic bush parts.
|
Technic bush with collar at one end |
![]() |
|
|
Technic bush without end collars |
![]() |
|
|
Technic bush collar quarter |
![]() |
|
Technic connector primitives |
Technic primitives Top |
These primitives are used to contruct technic connector pegs. They are orientated with the technic axle hole along the {y} axis and must not be scaled.
|
Technic connector - long with collar |
![]() |
|
|
Technic connector - long with collar and blind hole |
![]() |
|
|
Technic connector - long without collar |
![]() |
|
|
Technic connector - short with collar |
![]() |
|
|
Technic connector - short without collar |
![]() |
|
|
Technic connector - long with collar and slot |
![]() |
|
|
Technic connector - long with collar and notches |
![]() |
|
|
Technic connector - long with rectangular centre hole and thin (frictionless) ribs |
![]() |
|
|
Technic connector with friction - long with collar |
![]() |
|
|
Technic connector with friction - long without collar |
![]() |
|
|
Technic connector with friction - long with rectangular centre hole and collar |
![]() |
|
|
Technic connector with friction - long with collar and slot |
![]() |
|
|
Technic connector with friction - long with collar and blind hole |
![]() |
|
|
Technic connector with friction - long without collar with slot |
![]() |
|
|
Technic connector with friction - middle section with collar and slot |
![]() |
|
|
Technic connector with friction - middle section slotted with unsplit base collar |
![]() |
|
Technic connector hole primitives |
Technic primitives Top |
These primitives are used to contruct technic connector peg holes. They are orientated with the technic axle hole along the {y} axis. They must not be scaled in the {x} or {z} dimensions, but the peghole and npeghol families of primitives may be scaled in the {y} dimension.
|
Technic beam hole long |
![]() |
This primitive is used for Technic connector peg holes in 20LDu wide Technic beams. |
|
Technic beam hole long with extended end |
![]() |
This primitive is used for Technic connector peg holes in 20LDu wide Technic parts with an extended indentation. |
|
Technic beam hole long with only one end |
![]() |
This primitive is used for Technic connector peg holes for use in Technic parts with a narrow beam section. |
|
Technic beam hole long with extension to adjacent hole |
![]() |
This primitive is used for Technic connector peg holes at the end of 20LDu wide Technic beams. |
|
Technic beam hole short with extension to adjacent hole |
![]() |
This primitive is used for Technic connector peg holes at the end of 10LDu wide Technic beams. |
|
Technic connector hole |
![]() |
|
|
Technic connector hole - 180 degrees - long |
![]() |
|
|
Technic connector hole - 180 degrees - medium |
![]() |
|
|
Technic connector hole - 180 degrees - short |
![]() |
|
|
Technic connector hole - 90 degrees |
![]() |
|
|
Technic connector hole negative without top surface extensions |
![]() |
|
|
Technic connector hole negative without top surface extensions - half |
![]() |
|
|
Technic connector hole negative with top surface extensions |
![]() |
|
|
Technic peg hole to connector hole negative without top surface extensions |
![]() |
This primitive is designed to fill the gap between an axlehol4 or axlehol5 primitive and a Technic peg hole. |
|
Technic peg hole to connector hole negative with top surface extensions |
![]() |
This primitive is designed to fill the gap between an axlehol4 or axlehol5 primitive and a Technic peg hole. |
|
Technic peg hole to axle hole negative with top surface extensions |
![]() |
|
|
Technic peg hole to axle hole negative quarter for beams |
![]() |
|
Technic gear tooth primitives |
Technic primitives Top |
These primitives are used to contruct technic gears and racks. Gear teeth are shaped differently depending on the diameter of the gear wheel. These primitives must not be scaled.
|
Tooth for 8-tooth Technic gears |
![]() |
|
|
Tooth for 16-tooth Technic gears |
![]() |
|
|
Tooth for 24-tooth Technic gears |
![]() |
|
|
Tooth for 24-tooth Technic Crown Gear Type 2 |
![]() |
|
|
Tooth for 24-tooth Technic Crown Gear Type 3 |
![]() |
|
|
Tooth for 24-tooth Technic Crown Gear Type 1 |
![]() |
|
|
Tooth for 40-tooth Technic gears |
![]() |
|
|
Tooth for 12-tooth Technic bevel gears |
![]() |
|
|
Tooth for 14-tooth Technic bevel gears |
![]() |
|
|
Tooth for 20-tooth Technic bevel gears |
![]() |
|
|
Full size tooth for 28-tooth Technic bevel gears |
![]() |
|
|
Short tooth for 28-tooth Technic bevel gears |
![]() |
|
|
Tooth for 28-tooth Technic Differential |
![]() |
|
|
Tooth for Technic Gear Racks |
![]() |
|
|
Tooth for Large Technic Gears |
![]() |
|
Technic Duplo primitives |
Top |
These primitives represent various components of the Duplo-scale technic parts.
|
Duplo technic axle section |
![]() |
This primitive is comprises a 1LDu long section of duplo technic axle, including its ends. It may be scaled in the {y} dimension to produce an axle of any length. |
|
Duplo technic axle hole - closed |
![]() |
This primitive produces a 1LDu long section of duplo technic axle hole structure. It may be scaled in the {y} dimension as necessary. |
|
Duplo technic axle hub |
![]() |
This primitive produces a 1LDu long section of th eouter hub for a duplo technic axle hole. It may be scaled in the {y} dimension as necessary. |
|
Duplo technic connector hole |
![]() |
|
|
Duplo technic peg hole negative |
![]() |
|
|
Tooth for 8-tooth Duplo Technic gears |
![]() |
|
|
Tooth for 24-tooth Duplo Technic crown gears |
![]() |
|
Stud-related primitives
Stud primitives | Stud-related primitives Top |
Each studxxx primitive described below has a matching low resolution stu2xxx primitive, used by the fast-draw mode of renderers - these stu2xxx primitive must never be used in part files. An additional primitive (studline.dat) is used to substitute a single line for studs by the super fast-draw mode of LDraw.
All stud primitives are modelled with the solid disc uppermost, even if designed for the underside of parts (stud3, stud4, stud8, stud11). The origin is at the base of the stud and they extend for 4LDU in the {-y} dimension. To use for the underside, the primitives need to be inverted in the {y} dimension, viz.
1 16 x y z 1 0 0 0 -1 0
0 0 1 stud3.dat
These primitives must not be scaled in the {x} or {z} dimensions. Ideally they should not be scaled in the {y} dimension either, to allow the accurate substitution of chamfered studs by high-quality renderers [but this rule is flouted in the regular brick files, where stud4 is scaled by 5 to generate the underside tube].
|
Regular stud |
![]() |
|
|
Regular stud without edge around base |
![]() |
|
|
Regular stud with white dot |
![]() |
|
|
Regular electric stud |
![]() |
The electric contact is on the {-x} {-z} corner |
|
Truncated solid stud |
![]() |
For use on 2x2 round parts where the stud does not hang over the edge of the part. |
|
Moderately truncated solid stud |
![]() |
For use on 2x2 round parts where the stud does not hang over the edge of the part. |
|
Very truncated solid stud |
![]() |
For use on the 2x2 Light&Sound siren part where the stud does not extend over the edge of the part. |
|
Hollow stud |
![]() |
|
|
Hollow stud without edge around base |
![]() |
|
|
Hollow stud sloped |
![]() |
Hollow stud for inverted slope bricks. |
|
Truncated hollow stud without edge around base |
![]() |
For use on 2x2 octagonal parts where the stud does not hang over the edge of the part. |
|
Hollow stud with small hole |
![]() |
|
|
Truncated hollow stud |
![]() |
For use on 2x2 round parts where the stud does not extend over the edge of the part. |
|
Truncated hollow stud without edge around base |
![]() |
For use on 2x2 round parts where the stud does not hang over the edge of the part. |
|
Small underside stud |
![]() |
For use on the underside of parts (usually plates) between the gaps for studs. This is modelled with the solid disc uppermost.
To use for the underside of plates, it is necessary to invert in the {y} dimension, like
|
|
Small underside stud without edge around base |
![]() |
See note for stud3. |
|
Cross-shaped underside stud |
![]() | |
|
Cross-shaped underside stud for Minitalia parts |
![]() | |
|
Ring underside stud |
![]() |
See note for stud3. A semi-circular version of this is also available as 2-4stud4.dat, and a 75% version as 3-4stud4.dat. |
|
Ring underside stud without edge around base |
![]() |
See note for stud3. |
|
Ring underside stud with sloped end |
![]() |
For use on the underside of sloping parts. See note for stud3. |
|
Ring underside stud with half sloped end |
![]() |
For use on the underside of sloping parts where the slope starts midway across the stud. See note for stud3. |
|
Ring underside stud without outer cylinder |
![]() |
|
|
Ring underside stud without outer cylinder and top surface |
![]() |
|
|
Ring underside stud with extended hole |
![]() |
For use on the underside of plate thickness parts where the hole extends to the top surface of the plate. |
|
Ring underside stud with fillet stubs |
![]() |
For use on the underside of parts where a strengthening fillet joins the stud. The number of fillets is indicated by n: 1=one fillet, 2=two opposite fillets, 3=three fillets, 4=four fillets, 5=two adjacent fillets. The fillet width is indicatd by s: n=narrow (2LDu), s=standard (3LDu), w=wide (4LDu) |
Currently available primitives: | |
One fillet: stud4f1n, stud4f1s Two opposite fillets: stud4f2n, stud4f2s, stud4f2w Three fillets: stud4f3s Four fillets: stud4f4n, stud4f4s Two adjacent fillets: stud4f5n | |
|
Ring underside stud - split |
![]() |
A divided underside stud, as typically used in minifig headwear. See also note for stud3. |
|
Ring underside stud - split with single wide slot |
![]() |
A partially divided underside stud, used on pull-back motors. See also note for stud3. |
|
Ring underside stud - split with double wide slot |
![]() |
A divided underside stud, used on pull-back motors. See also note for stud3. |
|
Stud Tube Open Snap |
![]() |
|
|
Square underside stud hole |
![]() |
|
|
Scala stud |
![]() |
|
|
Duplo hollow top stud |
![]() |
|
|
Duplo hollow top stud without edge around base |
![]() |
|
|
Duplo hollow underside stud |
![]() |
|
|
Large Duplo hollow underside stud |
![]() |
|
|
Quatro stud |
![]() |
|
|
Quatro underside stud |
![]() |
|
|
Duplo Primo Stud |
![]() |
|
|
Duplo Primo Underside Stud Socket |
![]() |
|
|
Znap connector stud |
![]() |
|
Stud group primitives | Stud-related primitives Top |
Stud groups are provided to reduce the size of part files with many regularly spaced studs. The naming convention is stugN-XxZ.dat, where:
- N = type of stud (regular stud, hollow stud, underside stud, etc.)
- X = number of studs on the x axis
- Z = number of studs on the z axis
To prevent an overload of the library with excessive combinations, the numbers on the x and z axis are limited to:
- 1xZ stugs
- Xx1 stugs (Due to stud orientation you cannot rotate a 1xZ stud group by 90 degrees to get a Xx1 stud group)
- XxZ stugs where X = Z
These primitives must not be scaled.
|
Stud group | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() |
Currently available primitives :
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Miscellaneous primitives
Text primitves | Miscellaneous primitives Top |
The section comprises reusable glyphs for constructing text patterns. These primitives may be re-sized.
The naming convention for these primitives is typeffci, where ff is an arbitrary two-letter abbreviation for the typeface, c is the glyph class (u=upper case letter, l=lower case letter, n=number, s=symbol, a=accented letter) and i is the glyph identifier (a-z for the upper and lower case letters, 0-9 for the numbers).
|
Stencil typeface |
Currently available primitives : | |
ua, ub, ud, ue, uf, uh, ui, uk, ul, um, un, uo, ur, us, ut, uv, uw, uy, n0, n5, s4 (dollar symbol) |
Primitives for ZNAP parts | Miscellaneous primitives Top |
This section comprises primitives for the ZNAP parts, all of which have been modelled and released into the official library.
|
|
|
|
|
|
|
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
Arm, Clip and Pin primitives | Miscellaneous primitives Top |
This section comprises miscellaneous primitives that do not fit neatly into any of the other categories. All are highly specialised and represent components of parts which fit together with each other or other standard parts. As such these primitives are not intended to be re-sized.
|
Cylindrical arm two-fingered hinge |
![]() |
This primitive produces two-fingered hinge component of the cylindrical arm with a radius of 10LDu. |
|
Cylindrical arm three-fingered hinge |
![]() |
This primitive produces three-fingered hinge component of the cylindrical arm with a radius of 10LDu. |
|
Cylindrical arm three-fingered hinge with truncated middle finger |
![]() |
This primitive produces three-fingered hinge component of the cylindrical arm with a radius of 10LDu. |
|
Click-lock hinge single finger for bricks |
![]() |
This primitive produces the single finger of a click-lock hinge for use on bricks. To use on the side of bricks, rotate accordingly and place 10LDu below the top surface of the brick. To use on the top of bricks, rotate accordingly and place 4LDu below the top surface, centered on the stud location. |
|
Click-lock hinge single finger for arms |
![]() |
This primitive produces the single finger of a click-lock hinge for use on cylindrical arms. |
|
Click-lock hinge single finger for plate sides and ends |
![]() |
This primitive produces the single finger of a click-lock hinge for use on the sides or ends of plates. To use, rotate accordingly and place 2LDu below the top surface. |
|
Click-lock hinge single finger for crevices and ledges |
![]() |
This primitive produces the single finger of a click-lock hinge for use within crevices and on ledges. To use, rotate accordingly and place 1LDu below the top surface centred on a stud location. |
|
Click-lock hinge single finger for plate top |
![]() |
This primitive produces the single finger of a click-lock hinge for use on the top of plates. To use, rotate accordingly and place 1LDu below the top surface, centered on the stud location. |
|
Click-lock hinge single finger for plate top with groove. |
![]() |
This primitive produces the single finger of a click-lock hinge with a groove for use on the top of plates. To use, rotate accordingly and place 1LDu below the top surface centered on stid location. |
|
Click-lock hinge half dual finger for bricks and plates |
![]() |
This primitive produces one of the pair of a two finger click-lock hinge. Parts typically require two of these primitives rotated 180 degrees on the {z} axis. To use on the side of bricks, rotate accordingly and place 10LDu below top surface and 6 LDu off side surface. To use on the side of plates and windscreens, rotate accordingly, place 2LDu below top surface and 6LDu off side surface. |
|
Click-lock hinge half dual finger for arms |
![]() |
This primitive produces one of the pair of a two finger click-lock hinge. Parts typically require two of these primitives rotated 180 degress on the {z} axis. |
|
Click-lock hinge half dual finger - 7 position, missing clicks 4 and 6 |
![]() |
This primitive produces one of the pair of a two finger click-lock hinge, with reduced positions. Parts typically require two of these primitives rotated 180 degrees on the {z} axis. To use on the side of bricks, rotate accordingly and place 10LDu below top surface and 6 LDu off side surface. To use on the side of plates and windscreens, rotate accordingly, place 2LDu below top surface and 6LDu off side surface. |
|
Click-lock hinge half dual finger - 7 position, missing clicks 2 and 4 |
![]() |
This primitive produces one of the pair of a two finger click-lock hinge, with reduced positions. Parts typically require two of these primitives rotated 180 degrees on the {z} axis. To use on the side of bricks, rotate accordingly and place 10LDu below top surface and 6 LDu off side surface. To use on the side of plates and windscreens, rotate accordingly, place 2LDu below top surface and 6LDu off side surface. |
|
Click rotation ring with stop ring |
|
Click rotation ring without stop ring |
|
Vertical clip for Flags |
![]() |
This primitive produces a vertical clip designed to hold an 8LDu diameter pole or rod at be used for flag parts. |
|
Vertical clip for Bricks |
![]() |
This primitive produces a vertical clip designed to hold an 8LDu diameter pole or rod at be used for brick parts. |
|
|
![]() |
|
|
|
![]() |
|
|
|
![]() |
|
|
Vertical clip - three fingered |
![]() |
This primitive produces a three-fingered vertical clip designed to hold an 8LDu diameter pole or rod. |
|
|
![]() |
|
|
Thick 'C' clip |
![]() |
This primitive produces a thick 'C' clip for use with organic shape parts with a clip (claws, arms, weapons...). |
|
Thick 'C' clip minimal |
![]() |
This primitive produces a thick 'C' clip, with minimal surfaces. |
|
Horizontal clip |
![]() |
This primitive produces a horizontal clip designed to hold an 8LDu diameter pole or rod. |
|
|
![]() |
|
|
|
![]() |
|
|
|
![]() |
|
|
Bottom finger for classic windows |
![]() |
This primitive produces a single finger for the base of classic windows. |
|
Two-fingered plate hinge |
![]() |
This primitive produces the standard two-fingered hinge with a depth of 8LDu - the thickness of a plate. |
|
Three-fingered plate hinge |
![]() |
This primitive produces the standard three-fingered hinge with a depth of 8LDu - the thickness of a plate. |
|
Electric Plug Pin |
![]() |
This primitive produces the pin for electric plugs of type 3 and 4. |
|
Wheel holding pin |
![]() |
|
|
Wheel holding pin with two fillets |
![]() |
|
|
Wheel holding pin with two fillets missing bottom faces |
![]() |
|
|
Wheel holding pin with three fillets |
![]() |
|
|
Wheel holding pin with ridges |
![]() |
|
|
Wheel holding pin hole, type 2 |
![]() |
|
|
Bump |
![]() |
This class of primitives produces shallow hemisperical bumps, primarily used as locators for window and door inserts. |
|
Mursten Brick Slot |
![]() |
This primitive is used for the window/door slots on Mursten bricks. |
|
Handle for flat minifig shields. |
![]() |
|
|
Handle for curved minifig shields. |
![]() |
|
|
Electrical connector for 12V train track |
![]() |
|
Last updated 03 February 2018, to include LDraw updates up to 2018-01, by Chris Dee.
Website copyright ©2003-2022 LDraw.org, see Legal Info for details.
LDraw is a completely unofficial, community run free CAD system which represents official parts produced by the LEGO company.
LDraw™ is a trademark owned and licensed by the Estate of James Jessiman
LEGO® is a registered trademark of the LEGO Group, which does not sponsor, endorse, or authorize this site. Visit the official Lego website at http://www.lego.com