Geometry Attribute
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 |
Type String |
Description |
| BRep |
BRep |
Parametric geometry defined by NURB-based BRep shapes: Vertex, Edge, Wire, Face, Shell, Solid, Composite Solid, Compound |
| Mesh |
Mesh |
Free-form meshed surfaces |
| Curve Geometry |
Curve |
Geometry containing a curve |
| Line Strip |
SegmentStrip |
Geometry containing a set of segmented curves or straight lines |
| Point Set |
PointArray |
Geometry containing an array of 3D points |
| Overlay |
Overlay |
Geometry, which presents a 2D model in a 3D plane |
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| Geometry types for auxiliary (not purely geometric) items |
| 3D Label |
Label3D |
3D Labels |
| ViewPoint |
ViewPoint |
View Points, which allow storing the current view configuration |
| Measurement |
Measurement |
Measurements |
| Label3dManaged |
Label3dManaged |
Smart Labels |
There is also a number of deprecated geometry types providing backward compatibility with v5:
Deprecated Geometries.
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