API Reference > geometry-core > Curve > CurveExtendMode CurveExtendMode Enumeration enumeration of condition for extending a curve beyond start or end point. Not all CurvePrimitives support these modes. Members Name Value Description None 0 No extension allowed. OnTangent 1 Extend along continuation of the end tangent OnCurve 2 Extend along continuation of the curve. Defined in curve/CurveExtendMode.ts Line 17 Last Updated: 11 June, 2024