Table 6.115—DRM_Geometry_Face
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Property |
Description |
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Superclass |
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Class |
· <DRM Geometry Face> |
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Subclass |
· none |
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Definition |
An instance of this DRM class specifies a significant polygonal area. The external boundary of a <DRM Geometry Face> is specified by its <DRM Geometry Face Ring> component. |
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Example(s) |
· A triangulation of <DRM Polygon>s that detail the upper surface of a forest canopy is composed of many <DRM Geometry Face>s. |
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Inherited field elements |
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Field elements |
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Associated to (one-way) (inherited) |
· none |
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Associated to (one-way) |
· none |
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Associated by (one-way) (inherited) |
· none |
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Associated by (one-way) |
· one or more <DRM Geometry Edge> instances1 |
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Associated with (two-way) (inherited) |
· none |
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Associated with (two-way) |
· one or more <DRM Geometry Node> instances2 · zero or more <DRM Polygon>s |
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Composed of (two-way) (inherited) |
· zero or one <DRM Geometry ID> |
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Composed of (two-way) |
· one <DRM Geometry Face Ring> · zero or more <DRM¸Same As Geometry Face>s |
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Composed of (two-way metadata) (inherited) |
· none |
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Composed of (two-way metadata) |
· none |
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Component of (two-way) (inherited) |
· zero or one <DRM Union Of Geometry Topology> |
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Component of (two-way) |
· none |
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Constraints |
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Notes |
1 The <DRM Geometry Edge> instances that border a <DRM Geometry Face> instance - in other words, those specifying its <DRM Geometry Face Ring> component - associate to that <DRM Geometry Face> instance in order that it may be possible to determine, for any <DRM Geometry Edge> instance, the topological relationships in which it participates. 2 For level 3 topology or higher, any <DRM Geometry Node> instances contained within the boundary of a <DRM Geometry Face> instance have an association relationship with that <DRM Geometry Face> instance to indicate the relationship. For topology of less than level 3, the association relationship between instances of <DRM Geometry Face> and <DRM Geometry Node> has the same meaning, but data providers are not required to supply the information. |
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Class diagram |