SubDEdgeChain Class |
An ordered run of connected SubD edges.
Consecutive edges in a chain share a vertex, and each edge carries the direction it is traversed with, so the chain has a start and an end even when the individual edges do not agree on orientation. Chains are what commands like Bridge, Loft and edge sharpening operate on.
Inheritance HierarchySystemObject
Rhino.GeometrySubDEdgeChain
Rhino.GeometrySubDEdgeChain
Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll)
Since: 8.36
SyntaxThe SubDEdgeChain type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | SubDEdgeChain(SubD) |
Creates an empty chain in the given SubD.
|
| SubDEdgeChain(SubD, SubDEdge) |
Creates a chain containing a single starting edge. Grow it with
AddAllNeighbors(ChainDirection, SubDChainType) or
AddOneNeighbor(ChainDirection, SubDChainType).
|
Properties| Name | Description | |
|---|---|---|
 | EdgeCount |
The number of edges in this chain.
|
| Edges |
The edges of this chain, in order.
|
| IsClosedLoop |
True when the chain closes back on itself.
|
| ParentSubD |
The SubD this chain runs through.
|
Methods| Name | Description | |
|---|---|---|
| AddAllNeighbors |
Extends the chain as far as it will go at one or both ends.
|
| AddEdge |
Adds an edge to whichever end of the chain it connects to.
|
| AddOneNeighbor |
Extends the chain by one edge at one or both ends.
|
| Begin |
Clears the chain and restarts it from a single edge.
|
| Clear |
Removes every edge from the chain.
|
| Dispose |
Frees the unmanaged chain.
|
| EdgeAt |
Gets the edge at the given position in the chain. The returned edge carries the
direction the chain traverses it with, in
ComponentDirection.
|
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
 | Finalize |
Finalizer.
(Overrides ObjectFinalize.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| IsConvexLoop |
True when the chain is a closed loop that is convex.
|
| Reverse |
Reverses the direction of the chain.
|
 | SortEdgesIntoEdgeChains |
Sorts a set of edges into chains.
|
| ToLoftCurve |
Gets a NURBS curve suitable for lofting SubDs, following this chain.
|
| ToNurbsCurve |
Gets a NURBS curve on the SubD surface following this chain.
|
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
| TrimToRange |
Trims the chain down to the run of edges between firstEdge and lastEdge, removing
everything before firstEdge and everything after lastEdge.
|
| VertexAt |
Gets the vertex at the given position along the chain. A chain of N edges has N+1
vertices, or N when it is a closed loop.
|
Remarks
A chain holds a reference to its SubD and does not keep it alive across edits that
change the SubD topology; rebuild the chain after editing.
See Also