48 lines
2.5 KiB
Markdown
48 lines
2.5 KiB
Markdown
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GENERATOR: 'Mozilla/4.05C-SGI [en] (X11; I; IRIX64 6.5 IP28) [Netscape]'
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---
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<img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow2.gif">"30"
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"30"](mstkla.md#parent-child) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow3.gif">"30"
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"30"](mstkla.md) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow4.gif">"30"
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"30"](prelim.md)
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------------------------------------------------------------------------
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------------------------------------------------------------------------
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**Parent-Child Node (Vertex) Issues**
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------------------------------------------------------------------------
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All the operators are designed to work consistently with parent and
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child nodes(if they exist) consistently. Operators exist for getting the
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parent of a vertex, edge and face. The parent edge/face of a edge/face
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is constructed from the parents of its component vertices. Operators
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also exist for obtaining the child vertices/edges/faces of
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vertices/edges/faces.
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The upward and downward adjacency information is designed to be returned
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in a consistent manner as described below. If upward adjacency
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information is requested for a child entity then only those higher order
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entities connected to the child will be returned. On the other hand, if
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it is requested for a parent, upward adjacency information from all its
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children will be consolidated and returned. For example, if regions of a
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child vertex (node) are requested, then only the regions classified in
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that model region will be returned. On the other hand if one wants all
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the regions in all model regions connected to the node, one should get
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the parent of the vertex and ask for the regions connected to the parent
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vertex. The behavior of downward adjacency information queries is
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determined by the type of entity and how it is constructed. Asking for
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the nodes of a vertex will return only the child nodes if any of the
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nodes are on an interface. Parent faces and edges on an interface will
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return parent nodes and child faces and edges on an interface will
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return child nodes. *Lastly, if the entity is not on an interface, it is
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its own parent or its own child.*
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<img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow2.gif">"30"
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"30"](mstkla.md#parent-child) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow3.gif">"30"
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"30"](mstkla.md) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow4.gif">"30"
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"30"](prelim.md)
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