A collection of 3D curves making up a closed boundary. FaceBoundaryCurve has the following child elements:
| Child | Namespace | Type | Use | Cardinality | Choice | Description |
|---|---|---|---|---|---|---|
| Circle3D | ocx | ocx:Circle3D_T | req. | [1, ∞] | False | A circle in 3D space. |
| CircumArc3D | ocx | ocx:CircumArc3D_T | req. | [1, ∞] | False | 3D Line/Arc representation. Represents a semicircle uniquely defined by three points in 3D space given by the start position, intermediate position and the end position.. |
| CircumCircle3D | ocx | ocx:CircumCircle3D_T | req. | [1, ∞] | False | Definition of a circle in 3D space by a circum-circle of 3 points. |
| CompositeCurve3D | ocx | ocx:CompositeCurve3D_T | req. | [1, ∞] | False | The concept of a composite curve composed of a collection of Line3D, CircumArc3D and/or NURBS segments. Curves are sorted end to end and have C0 continuity across each segment in the CompositeCurve3D definition. |
| Ellipse3D | ocx | ocx:Ellipse3D_T | req. | [1, ∞] | False | An ellipse in 3D space. |
| Line3D | ocx | ocx:Line3D_T | req. | [1, ∞] | False | A straight line defined by two points. |
| NURBS3D | ocx | ocx:NURBS3D_T | req. | [1, ∞] | False | Non-Uniform Rational Spline Base curve definition. |
| PolyLine3D | ocx | ocx:PolyLine3D_T | req. | [1, ∞] | False | A list of 3D points defining a sequence of linear segments. Repeat the first position at the end of the last line segment to form a closed contour. |
FaceBoundaryCurve has the following attributes:
| Attribute | Namespace | Type | Use | Default | Fixed | Description |
|---|---|---|---|---|---|---|
| isUVspace | ocx | xs:boolean | opt. | false | If set to True, the FacBoundaryCurve is defined in the parametric UV space. The Pont3D X and Y corresponds to U and V while the Z coordinate is disregarded. The default is False, i.e. the FaceBoundaryCurve is defined in the 3D space. |