SubDComponentParameter Structure |
Identifies a point on the surface of a SubD.
SubDs have no global (u,v) parameterization. Instead a point on the surface is identified relative to a component of the SubD: a vertex, a point on an edge, or a point inside a face. A point inside a face is given by the index of the face corner it belongs to plus two parameters inside that corner, because a face with five or more sides has no single well behaved (u,v) domain.
Use ClosestPoint(Point3d, Point3d, SubDComponentParameter) to find a parameter and Evaluate(SubDComponentParameter, Point3d) and its overloads to evaluate one.
Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll)
SyntaxThe SubDComponentParameter type exposes the following members.
Properties| Name | Description | |
|---|---|---|
 | ActiveFaceId |
Gets the id of the face this parameter uses to resolve which sector of a
vertex or which side of an edge it means, or 0 if there is none.
It is always 0 when IsFaceParameter is true; use
ComponentId in that case.
|
| ComponentId |
Gets the id of the SubD component this parameter is relative to, or 0 if
this parameter is not set.
|
| ComponentIndex |
Gets the component index of the SubD component this parameter is relative
to. It is Unset if this parameter is not set.
|
| EdgeParameter |
Gets a value between 0 and 1 identifying a point on the edge, or
NaN if IsEdgeParameter is false.
|
| FaceCornerIndex |
Gets the index of the face corner the face parameters are measured in, or
-1 if IsFaceParameter is false.
|
| FaceCornerParameters |
Gets the two parameters inside the face corner identified by
FaceCornerIndex. Both run from 0 to 1/2: (0,0) is the corner
vertex and (1/2,1/2) is the center of the face. X runs towards the
midpoint of the edge leaving the corner and Y towards the midpoint of the
edge entering it. The point is Unset if
IsFaceParameter is false.
|
| FaceEdgeCount |
Gets the number of edges of the face, or 0 if
IsFaceParameter is false.
|
| IsEdgeParameter |
Gets true if this parameter identifies a surface point on a SubD edge.
|
| IsFaceParameter |
Gets true if this parameter identifies a surface point inside a SubD face.
|
| IsSet |
Gets true if this parameter identifies a point on a SubD.
|
| IsVertexParameter |
Gets true if this parameter identifies the surface point at a SubD vertex.
|
 | Unset |
The unset parameter. It does not identify a point on any SubD.
|
Methods| Name | Description | |
|---|---|---|
 | CreateEdgeParameter |
Creates a parameter that identifies a surface point on a SubD edge.
|
| CreateFaceParameter |
Creates a parameter that identifies a surface point inside a SubD face.
|
| CreateVertexParameter |
Creates a parameter that identifies the surface point at a SubD vertex.
|
| Equals(Object) | Indicates whether this instance and a specified object are equal. (Overrides ValueTypeEquals(Object).) |
| Equals(SubDComponentParameter) | Indicates whether the current object is equal to another object of the same type. |
| GetHashCode | Returns the hash code for this instance. (Overrides ValueTypeGetHashCode.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| ToString | Returns the fully qualified type name of this instance. (Overrides ValueTypeToString.) |
Operators| Name | Description | |
|---|---|---|
 | Equality |
Determines whether two parameters are equal.
|
| Inequality |
Determines whether two parameters are different.
|
See Also