DGKC Control Documentation

Geometry is an attribute of entity. Geometry defines shape of the surface or curve or a set of points. In mathematical terms it defines internal distances between various points and parts of the shape.

Geometry does not have location or orientation. Most often it is expressed using data related to some fixed, but unspecified set of coordinate axes. Geometry obtains location and orientation only using local frame of the entity which uses the geometry. Geometries can be shared by different entities almost always at different locations/orientations

There are several significantly different types of geometry. Type is a string property of geometry. See IEntity_DG.GeometryType for the list of valid options.

Geometry is defined internally using various data structures which significantly depend on type of the geometry.

Supported geometry types:

Name	GeometryType string	Primary Interface	Description
BRep	BRep	IBRepGeometry_DG	Parametric geometry defined by NURB-based BRep shapes: Face, Solid, etc.
Mesh	Mesh	IMesh_DG	Free-form meshed surfaces
Curve Geometry	Curve	ICurveGeometry_DG	Geometry containing a curve
Line Strip	SegmentStrip	ISegmentStripGeometry_DG	Geometry containing a set of segmented curves or straight lines
Point Set	PointArray	IPointSetGeometry_DG	Geometry containing an array of 3D points
Overlay	Overlay	I2DEditor_DG	Geometry, which presents a 2D model in a 3D plane
3D Label	Label3D	ILabelGeometry_DG	3D Labels
ViewPoint	ViewPoint	IViewPoint_DG	View Points, which allow storing the current view configuration
Measurement	Measurement	IMeasurement_DG	Measurements
Label3dManaged	Label3dManaged	ILabelGeometry_DG	Smart Labels

		Deprecated
3DS	3DS	IStrip	Arc spline surfaces and curves
SOR	SOR	IStrip	Arc spline surface of revolution

There is also a number of deprecated geometry types providing backward compatibility with v5: Deprecated Geometries.