Geometry

Geometry

Geometry_oM

Geometry_oM is the core library, on which all engineering BHoM objects are based. It provides a common foundation that allows to store and represent spatial information about any type of object in any scale: building elements, their properties and others, both physical and abstract.

All objects can be found here in the Geometry_oM

The code is divided into a few thematic domains, each stored in a separate folder:

• Coordinate System
• Curve
• Interface
• Math
• Mesh
• Misc
• SettingOut
• ShapeProfiles
• Solid
• Surface
• Vector

All classes belong to one namespace (BH.oM.Geometry) with one exception of Coordinate Systems, which live under BH.oM.Geometry.CoordinateSystem. All methods referring to the geometry belong to BH.Engine.Geometry namespace, which is a part of the BHoM_Engine.

Interfaces

Two separate families of interfaces coexist in Geometry_oM. First of them organizes the classes within the namespace:

Interface	Implementing classes
IGeometry	All classes within the namespace
ICurve	Curve classes
ISurface	Surface classes

The other extends the applicability of the geometry-related methods to all objects, which spatial characteristics are represented by a certain geometry type:

Interface	Implementing classes
IElement0D	All classes represented by Point
IElement1D	All classes represented by ICurve
IElement2D	All classes represented by a planar set of closed ICurves (e.g. building panels)
IElement3D	All classes represented by a closed volume (e.g. room spaces) - not implemented yet

Tolerances

There is a range of constants representing default tolerances depending on the tolerance type and scale of the model:

Scale	Value
Micro	1e-9
Meso	1e-6
Macro	1e-3
Angle	1e-6

Conversion to proprietary software packages

While being pulled/pushed through the Adapters, the BHoM geometry is converted to relevant geometry format used by each software package.

BHoM Rhinoceros conversion table

Known issues

At the current stage, Geometry_oM bears a few limitations:

• Nurbs are not supported (although there is a framework for them in place)
• 3-dimensional objects (curved surfaces, volumes etc.) are not supported with a few exceptions
• Boolean operations on regions contain a few bugs