Class Name: Geometry Face
Subclasses
This DRM class is concrete and has no subclasses.
Definition
An instance of this DRM class is used to represent a geometric region,
the external boundary of which is specified by an ordered sequence of
three or more associated <Geometry Edge> instances.
Primary Page in DRM Diagram:
Secondary Pages in DRM Diagram:
Example
Consider a forest canopy represented by a set of
<Polygon> instances. The topology of the upper surface of the
canopy may be represented by a set of
<Geometry Face> instances, each corresponding to the boundary
of one of the <Polygon> instances.
FAQs
No FAQs supplied.
Constraints
Associated with (two-way)
Component of (two-way) (inherited)
Inherited Field Elements
This class has no inherited field elements.
Notes
Associated with Notes
These <Geometry Edge> instances specify the
border of the <Geometry Face> instance.
For level 3 topology or higher, any
<Geometry Node> instances
contained within the boundary of a
<Geometry Face> instance
have an association relationship with that
<Geometry Face>
instance to indicate the relationship.
For topology of less than level 3, the association relationship
between <Geometry Face> instances
and <Geometry Node> instances has
the same meaning, but data providers are not required to
supply the information.
If present, these <Geometry Volume> instances (if any
exist) are those bounded by the
<Geometry Face> instance, possibly one for each side
of the <Geometry Face> instance.
The <Geometry Face> instance corresponds to the
geometric region bounded by each <Polygon> instance.
Where multiple <Polygon> instances are associated with
the <Geometry Face> instance, each
<Polygon> instance represents the same geometric region
and shall be collocated with a common external boundary.
Prev: Geometry Edge.
Next: Geometry Hierarchy.
Up:Index.