Class Name: Feature Ring Edge Direction
Definition
Link data that indicates whether each Feature
Edge that is a component of a Feature Face
Ring is oriented in the same direction as the
Feature Face Ring, and should therefore be
traversed from its
Feature Edge Starting Node to its
Feature Edge Ending Node, or in
the opposite direction.
Primary Page in DRM Diagram:
Secondary Pages in DRM Diagram:
Example
- The External Feature Face Ring
of a Feature Face consists of three
Feature Edges. In traversing the ring, the
first Feature Edge might be traversed from
Feature Edge Starting Node to
Feature Edge Ending Node, so its
Feature Ring Edge Direction
would be TRUE (i.e., forward). If the next Feature
Edge was traversed from its
Feature Edge Ending Node (which
would be the same Feature Node as the
Feature Edge Ending Node of the
previous Feature Edge) to its
Feature Edge Starting Node, its
Feature Ring Edge Direction
would be FALSE (i.e., backward).
FAQs
- Isn't this information redundant?
- Yes. This information can be derived by comparing the
Feature Edge Terminal Nodes of
consecutive Feature Edges within the
Feature Face Ring. However, it is
provided as a convenience and as a validity check.
Constraints
None.
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