Mathematical Objects
Mathematical, or Pure Geometric Objects, are
dynamically created objects, which are not part of the model. but rather
used for geometric calculations. Mathematical Objects do not normally implement
IEntity_DG interface.
Mathematical Objects can be created via
Create or
Create2 method of
IDIObjectGenerator with
parameter eType set to a
member of
EObjectType enumeration.
Examples of Mathematical Objects are: Frame,
FreeForm 3D Curves,
Splined 3D Curves, and simpler
objects like Oriented Box,
Plane and
arcs
Although Mathematical Objects are not part of the model, in many cases they still can
be rendered in the scene using IScene_DG.CreatePresentationEntity(). IDraw_DG is another way of "drawing into the model" for simple objects.
See also: Rotation Sample, Sample List.
